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Doosan Corporation patents (2018 archive)


Recent patent applications related to Doosan Corporation. Doosan Corporation is listed as an Agent/Assignee. Note: Doosan Corporation may have other listings under different names/spellings. We're not affiliated with Doosan Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "D" | Doosan Corporation-related inventors


Magnetic field communication system and method

A magnetic field communication system and method is devised for communicating a signal indicating an internal state of metal equipment through a magnetic field and for converting the signal communicating through the magnetic field into power to analyze the internal state of the metal equipment. The system includes a sensor unit disposed inside a metal apparatus and an adapter disposed outside the metal equipment. ... Doosan Corporation

Magnetic field communication system and method

A magnetic field communication system and method is devised for communicating a signal indicating an internal state of a bearing through a magnetic field and for converting the signal communicating through the magnetic field into power to analyze the internal state of the bearing. The system includes a sensor unit disposed inside a bearing and an adapter disposed outside the bearing. ... Doosan Corporation

Film and impingement platform cooling for serpentine cooled turbine blades

A serpentine turbine blade can include: a platform having a top surface; an air foil on the top surface of the platform; a trailing edge turnaround formed in the platform; and a filmhole formed in the platform, wherein the filmhole is connected to the trailing edge turnaround through an impingement cavity in the platform. The air foil includes an internal cooling cavity providing a coolant to the trailing edge turnaround. ... Doosan Corporation

Sealing gas supply apparatus

Disclosed herein is a sealing gas supply apparatus. In the sealing gas supply apparatus for supplying sealing gas to a turbomachine of a power generation system, a source comprises at least one low-temperature source for supplying a working fluid to the sealing gas supply apparatus and at least one high-temperature source for supplying a working fluid having a higher temperature than the low-temperature source to the sealing gas supply apparatus, and the working fluids are mixed in the sealing gas supply apparatus to be suitable for a sealing condition as a temperature condition required in a sealing system so as to be supplied to the sealing system of the turbomachine. ... Doosan Corporation

Exhaust gas cleaning system and monitoring method of the same

An exhaust gas cleaning system comprises a reducing agent injection module installed in an housing mounted in an exhaust pipe through which an exhaust gas is discharged, the reducing agent injection module being configured to inject a reducing agent into the housing, a selective catalyst reduction device installed in rear of the reducing agent injection module and configured to catalytic react the reducing agent with nitrogen oxide included in the exhaust gas to reduce the nitrogen oxide, a differential pressure sensor to detect a differential pressure between a pressure in the housing in front of the selective catalyst reduction device and a pressure of the housing in rear of the selective catalyst reduction device, and a control device to receive the pressure information from the differential pressure sensor and to output a first warning signal when the detected differential pressure is lower than a predetermined pressure.. . ... Doosan Corporation

Apparatus for axial locking of bucket and bucket assembly and gas turbine having the same

An apparatus for axial locking of a bucket includes a depressed portion formed on an end portion of a male dovetail extending from a bucket and on an outer side of a seating groove of a female dovetail disposed on an outer circumferential surface of a rotor disk, and a locking member disposed in the depressed portion and configured to contact the male dovetail and the seating groove of the female dovetail to prevent the bucket mounted on the rotor disk from being separated in the axial direction.. . ... Doosan Corporation

Method and apparatus for controlling robot

A method and an apparatus for controlling a robot are provided. According to one aspect of the present disclosure, the method can include receiving information on a work type of robot motion performed by the robot; generating workflow of the robot motion based upon the received information on the work type of the robot motion; measuring information on work environment in which the robot motion is performed in accordance with the work type and the workflow of the robot motion by controlling the robot; receiving work information on the robot motion in accordance with the work type and the workflow of the robot motion by controlling the robot; and performing the robot motion in accordance with the work type and the workflow of the robot motion by controlling the robot based upon the measured information on the work environment and the received work information on the robot motion.. ... Doosan Corporation

Construction machine and method for controlling construction machine

Disclosed are a construction machine such as an excavator having a hydraulic system and a method for controlling the construction machine. The construction machine includes: a hydraulic pump which is operated by a driving source to supply a working fluid; an actuator which operates by being supplied with the working fluid from the hydraulic pump; a spool which controls a flow of the working fluid supplied to the actuator from the hydraulic pump; an operating unit which controls an operation of the actuator; a memory unit which stores at least two operating speed profiles for the actuator; an operating speed selecting unit which selects any one of the at least two operating speed profiles stored in the memory unit; and a control unit which controls a discharge flow rate of the hydraulic pump based on the operating speed profile selected by the operating speed selecting unit.. ... Doosan Corporation

Angle head attachment of a machine tool

An angle head attachment of a machine tool may include a main shaft, a bevel gear, a spindle and at least one idle gear module. The main shaft may be rotated with respect to a first direction. ... Doosan Corporation

Compressor blade locking mechanism in disk with tangential groove

A compressor blade locking device can include: a first support including a first locking groove; a second support including a left groove and a first protrusion corresponding to the first locking groove; a third support including a second locking groove; a fourth support including a right groove and a second protrusion corresponding to the second locking groove; a center support disposed between the second support and the fourth support; and a tab disposed in the center support, wherein the tab is configured to be turned such that the tab is disposed in the left groove and the right groove.. . ... Doosan Corporation

Compressor blade locking mechanism in disk with axial groove

A compressor bladed disk comprises a disk including an axial groove and a disk protrusion, a compressor blade including an attachment engaged with the axial groove of the disk, and a first locking plate disposed on the disk and the attachment, wherein the attachment includes an upstream surface and an upstream fillet connected to the upstream surface, wherein the upstream surface of the attachment and a protrusion front surface of the disk protrusion are aligned with each other, wherein a back surface of the first locking plate is disposed on the upstream surface of the attachment and the protrusion front surface of the disk protrusion, and wherein the first locking plate is disposed on the upstream fillet. The compressor bladed disk further comprises a second locking plate disposed on a downstream surface of the attachment.. ... Doosan Corporation

Pre-swirler for gas turbine

Disclosed is a pre-swirler for a gas turbine. A pre-swirler for a gas turbine according to an embodiment of the present invention including an auxiliary vane between main vanes disposed along a circumferential direction of a pre-swirler housing of a gas turbine to promote stable movement of cooling air.. ... Doosan Corporation

Gas turbine ring segment having serially connected cooling holes and gas turbine including the same

A gas turbine ring segment for a gas turbine. The gas turbine includes a rotor rotating about an axis, a housing containing the rotor to be rotatable, and a stationary wing ring disposed on an inner circumferential portion of the housing to be annular about the axis. ... Doosan Corporation

Gas turbine ring segment having straight cooling holes and gas turbine including the same

A gas turbine ring segment for a gas turbine. The gas turbine ring segment includes an impingement target wall having an impingement target surface formed in one side, in a direction of a main cavity, and a hot side surface formed on the other side, in which the main cavity is located in a central portion in an axial direction. ... Doosan Corporation

08/09/18 / #20180223675

Double shelf squealer tip with impingement cooling of serpentine cooled turbine blades

A turbine blade comprises a leading edge, a trailing edge, a squealer tip floor, and one or more walls arranged to form a cooling circuit within the turbine blade, the one or more walls forming an impingement shelf having one or more impingement holes through which coolant is expelled to cool the turbine blade.. . ... Doosan Corporation

08/09/18 / #20180223669

Disk assembly for gas turbine compressor

Disclosed herein is a disk assembly for a gas turbine compressor, which comprises a partition wall formed to partition a space between disks for a gas turbine compressor to optimize a cooling fluid path.. . ... Doosan Corporation

08/02/18 / #20180216826

Device to correct flow non-uniformity within a combustion system

A flow controller in a combustor of a gas turbine includes a body and a flow regulating portion configured to be placed in an air path providing air flow to a combustion chamber, the flow regulating portion including a plurality of holes configured to regulate the amount of air provided to one or more fuel nozzles in the combustor.. . ... Doosan Corporation

08/02/18 / #20180216536

Gas turbine

Provided is a gas turbine including: a combustor positioned between a compressor and a turbine of a gas turbine; a cooling air discharge unit configured to receive compressed air from the compressor, receive cooling water from a power plant, and discharge cooling air having exchanged heat with the compressed air; and a supply unit configured to supply the cooling air discharged from the cooling air discharge unit to the turbine and the combustor.. . ... Doosan Corporation

07/26/18 / #20180209650

Resonator for damping acoustic frequencies in combustion systems by optimizing impingement holes and shell volume

A resonator in a combustor of a gas turbine comprises a flow sleeve defining an air path to provide air flow to a combustion chamber of the combustor, and one or more impingement holes disposed on the flow sleeve tuned to a damping frequency.. . ... Doosan Corporation

07/26/18 / #20180209439

Compressor blade locking mechanism in disk with tangential groove

A compressor blade locking device can include: a first support including a first locking groove; a second support including a second locking groove; an upper plate disposed in the first locking groove and the second locking groove; and a plurality of bolts passing through the upper plate and coupled with the first support and the second support. The compressor blade locking device can further include a center support interposed between the first support and the second support.. ... Doosan Corporation

07/26/18 / #20180209351

Method for controlling surge margin of gas turbine and extraction device for gas turbine

Disclosed herein is a method for controlling a surge margin of a gas turbine and an extraction device for a gas turbine. The method for controlling the surge margin of the gas turbine and the extraction device for the gas turbine may support stable operation of a compressor unit in the gas turbine, thereby improving the efficiency of the gas turbine and minimizing vibration and noise of the gas turbine.. ... Doosan Corporation

07/26/18 / #20180209121

Construction machinery and method of controlling construction machinery

Disclosed are a construction machine and a method of controlling a construction machine. The construction machine includes: a first pump and a second pump; an engine which provides available torque to the first pump and the second pump; a first joystick and a second joystick which control actuators operated by a working fluid discharged from the first pump and the second pump; a joystick operation amount acquiring unit which acquires operation amounts of the first joystick and the second joystick; and a control unit which adjusts a torque distribution ratio with respect to the first pump and the second pump in accordance with the operation amounts of the first joystick and the second joystick when a sum of required torque of the first pump and required torque of the second pump is higher than the available torque.. ... Doosan Corporation

07/19/18 / #20180205142

Composite substrate for antenna module and preparation method thereof

The present disclosure provides a composite substrate for an antenna module, which includes: a first non-magnetic substrate that is configured to have a first copper foil; a second non-magnetic substrate that is configured to have a second copper foil; and a magnetic sheet that is configured to be interposed between the first non-magnetic substrate and the second non-magnetic substrate and that is configured to be integrally laminated with the non-magnetic substrates, and further provides a preparation method thereof. The present disclosure provides a simplification of a process, low costs, a slim design, and a grip-feeling of a metal material while providing functions of wireless charging, mst, and nfc.. ... Doosan Corporation

07/19/18 / #20180202661

Flow conditioner to reduce combustion dynamics in a combustion system

A flow conditioner in a combustor of a gas turbine comprises a body and a flow conditioning portion configured to be placed in an air path providing air flow to a combustion chamber, the flow conditioning portion including a plurality of holes tuned to a damping frequency to dampen a pressure fluctuation caused by combustion dynamics from the combustion chamber.. . ... Doosan Corporation

07/19/18 / #20180202451

Centrifugal compressor

Disclosed is a centrifugal compressor capable of minimizing leakage of fluid while realizing high aerodynamic performance in the process of compressing the fluid. The centrifugal compressor includes an impeller having blades, a housing formed with an inlet and an outlet, a sealing unit disposed adjacent to one of the inlet and the outlet, and a partial shroud disposed adjacent to the sealing unit and formed at one of the inlet and the outlet to partially surround outer peripheral portions of outer ends of the blades.. ... Doosan Corporation

07/19/18 / #20180202324

Complex supercritical co2 generation system

The present invention relates to a complex supercritical co2 generation system capable of increasing the heat exchange efficiency to improve a system output. According to the present invention, a complex generation system of a bottoming cycle and a topping cycle is configured, a flow rate of a cold side outlet of a bottoming cycle recuperators provided in parallel is branched to be supplied to a recuperator of a topping cycle provided in series, thereby increasing heat exchange efficiency of the topping cycle.. ... Doosan Corporation

07/12/18 / #20180195396

Blade, cut-back of blade or vane and gas turbine having the same

A cut-back of a blade or vane in a gas turbine may comprise a first sidewall; a plurality of trailing ribs extended from the first sidewall and arranged along an end of the first sidewall; a second sidewall separated from the first sidewall, having a longer tail than the first sidewall and in contact with the plurality of trailing ribs; and one or more cut-back blocks extended between two trailing ribs along the inner surface of the second sidewall. The cut-back of the blade or vane may reduce the weight through the trailing ribs and the cut-back blocks formed at the trailing edge, and improve a heat transfer effect while retarding crack growth.. ... Doosan Corporation

07/12/18 / #20180195254

Apparatus and method for controlling construciton machine

The present invention relates to an apparatus and method for controlling a construction machine. An apparatus for controlling a construction machine according to an embodiment of the present invention may compare a fuel efficiency gain expected when engine revolutions per minute (rpm) is decreased with a fuel efficiency gain expected when a current torque curve is changed to a torque curve corresponding to a condition in which auxiliary power is provided and selected from among the plurality of torque curves and then the latter torque curve is selectively applied, based on the fuel efficiency map, and may control an engine by means of a method by which a larger fuel efficiency gain is expected.. ... Doosan Corporation

07/05/18 / #20180187555

Gas turbine blade

Disclosed herein is a gas turbine blade. The gas turbine blade includes a guide portion disposed adjacent to a direction-changing portion to guide the flow direction of cooling air in order to enhance the cooling efficiency of the turbine blade and promote the stable flow of the cooling air in a cooling passage.. ... Doosan Corporation

07/05/18 / #20180185771

High-rate sedimentation tank and water treatment apparatus including the same

A high-rate sedimentation tank includes a hopper configured to be supplied with raw water including floc, at least one circular orifice pipe disposed at a lower portion of the hopper and configured to have the floc deposited therein as a sludge while passing the floc included in the raw water therethrough, and a sludge outlet configured to discharge the sludge deposited by passing through the circular orifice pipe to an outside of the hopper.. . ... Doosan Corporation

06/28/18 / #20180181154

Fuel cell power plant with real and reactive power modes

An illustrative example fuel cell power plant includes a cell stack assembly having a plurality of fuel cells configured to generate electricity based on an electrochemical reaction. The power plant includes a capacitor, a plurality of inverters, and at least one controller that is configured to control the plurality of inverters in a first mode and a second mode. ... Doosan Corporation

06/28/18 / #20180179904

Gas turbine

A gas turbine includes protrusions provided on perimeters of front and rear surfaces of the turbine disk, a first retainer unit having openings at positions corresponding to the respective protrusions provided on the front surface of the turbine disk, and a second retainer unit having a first end thereof disposed in a first insert slot of the turbine disk and a second end thereof disposed in the second insert slot of turbine blades to fix the plurality of turbine blades to the turbine disk.. . ... Doosan Corporation

06/28/18 / #20180179902

Locking spacer for rotor blade

A locking spacer, which is fitted in a dovetail slot provided on an outer circumferential surface of a disk put on a rotor shaft, includes: a pair of first blocks each provided with a dovetail joint, and configured to have a size occupying a portion of an internal space of the dovetail slot; a pair of second blocks having a size occupying a portion of the internal space of the dovetail slot, the portion not being occupied by the pair of first blocks, and each being provided with a locking groove; and a locking block having a size occupying a portion of the internal space of the dovetail slot, the portion not being occupied by the first and second blocks, and being provided with a rotating locking arm configured such that opposite end portions thereof are inserted into the locking grooves.. . ... Doosan Corporation

06/21/18 / #20180171869

Turbine including flue gas recirculation combustor

A flue gas recirculation combustor includes a combustor chamber configured such that fuel and combustion gas are injected therein to cause combustion and having a nozzle-side end and a combustor outlet, a nozzle can connected to the nozzle-side end of the combustor chamber, a plurality of nozzles disposed in the nozzle can and configured such that an injection direction thereof is directed to a side of the combustor chamber, and a sleeve disposed in a premixing space defined between the nozzle can and the nozzle-side end of the combustor chamber, the sleeve including a recirculation pathway to recirculate combustion air from the combustor chamber to the premixing space.. . ... Doosan Corporation

06/21/18 / #20180171810

Gas turbine

A gas turbine includes a bearing housing surrounding an outside of a tie rod provided on the turbine. One end of a power strut is connected to an outside of the bearing housing, and the other end is radially arranged outwards. ... Doosan Corporation

06/21/18 / #20180171807

Locking spacer for rotor blade

A locking spacer, which is fitted in a dovetail slot provided on an outer circumferential surface of a disk put on a rotor shaft, includes: a pair of first blocks each provided with a dovetail joint and a stepped seating surface with a first bolt hole, and configured to have a size occupying a portion of an internal space of the dovetail slot; a second block having a size to be inserted into a remaining portion of the internal space of the dovetail slot, and having a height corresponding to the seating surfaces; a fixing plate seated on both the seating surfaces of the first blocks and an upper surface of the second block, and provided with second bolt holes corresponding to the first bolt holes; and a bolt screwed into the first bolt hole through an associated second bolt hole.. . ... Doosan Corporation

06/21/18 / #20180171592

Control device and control method for construction machine

The present invention relates to a control device and control method for a construction machine. A control device and control method for a construction machine according to the embodiments of the present invention can determine a need for the operation of the alternator by taking into account required electrical energy and the current charge amount of a battery when auxiliary power is received from the auxiliary power device, and can thus decrease an engine rpm in a situation in which power generation is not required, thereby improving the fuel efficiency of a construction machine.. ... Doosan Corporation

06/21/18 / #20180171421

Method and system for recovering carbonate from steel slag

The present invention relates to a method and system for recovering carbonate from steel slag, in which it is possible to extract carbonate from steel slag and reuse the extracted carbonate, and to recycle steel slag and make use of co2 gas without emission to the atmosphere. Since unreacted metal ions and an acidic solvent are reused in the method and system, it is possible to increase carbonate extraction efficiency and reduce an amount of waste.. ... Doosan Corporation

06/14/18 / #20180164780

Construction machine data processing method, device for performing same, construction machine data processing server, and construction machine data processing unit

In a method of processing data of a construction machine, a configuration file may be generated from master data of the construction machine stored in a server. The configuration file may be transmitted to the construction machine to share the configuration file between the server and the construction machine. ... Doosan Corporation

06/14/18 / #20180163545

Cooling structure for vane

A gas turbine vane includes a sidewall having a plurality of film holes formed therein and defining an airfoil having a leading edge and a trailing edge, a cut-back formed at the trailing edge of the airfoil defined by the sidewall, an insert spaced apart from an inner surface of the sidewall and installed within the sidewall while having a plurality of insert holes formed therein, and a plurality of posts extending from the sidewall. The plurality of insert holes are formed in a plurality of rows, the insert holes of each row are arranged at a distance from the leading edge to the trailing edge, and a surface of the insert is positioned on the posts.. ... Doosan Corporation

06/07/18 / #20180156075

Supercritical co2 generation system for series recuperative type

. . The present invention relates to a supercritical co2 power generation system of a series recuperative type. According to an embodiment of the present invention, an inlet temperature of a turbine can be increased to increase a work of the turbine, thereby realizing a cycle design having improved turbine efficiency. ... Doosan Corporation

06/07/18 / #20180156073

System and method for fast startup of a combined cycle power plant

Provided is a system for controlling start-up of a combined cycle power plant that includes a gas turbine that includes a rotor, an hrsg that generates steam, a steam turbine that includes a rotor, and generators that generate electric power using rotation forces, respectively, of the rotor of the gas turbine and the rotor of the steam turbine, the system including; a sensor that measures operating states of components of the combined cycle power plant; and a controller that controls the start-up, based on the operating states, which are acquired from the sensor, in which the controller verifies one or more restrictive conditions that restrict setting of an operational value of an operational parameter for the combined cycle power plant, based on the operating states, which are acquired from the sensor, and, based on a result of the verification, sets the operational value.. . ... Doosan Corporation

05/31/18 / #20180149057

Power apparatus including reducing agent supply control system and reducing agent supply control method

A power apparatus including a reducing agent supply control system includes: an engine configured to emit exhaust gas containing nitrogen oxide by burning air and fuel at a preset air-fuel ratio; an exhaust passage configured such that the exhaust gas emitted by the engine moves therethrough; a pressure sensor configured to actually measure the pressure of air which is supplied to the engine; a nitrogen oxide concentration sensor installed on the exhaust passage, and configured to measure the nitrogen oxide (nox) concentration of the exhaust gas; a reducing agent supply unit configured to supply a reducing agent to the exhaust gas which moves along the exhaust passage; and a control unit configured to determine the amount of reducing agent to be supplied based on information received from the pressure sensor and the nitrogen oxide concentration sensor, and to control the reducing agent supply unit.. . ... Doosan Corporation

05/31/18 / #20180148907

Hydraulic system of construction machinery

A hydraulic system for construction machinery comprises a regeneration valve unit including a first opening/closing valve installed in a first hydraulic line which connects a head-side chamber of a boom cylinder and a drain tank, to open and close the first hydraulic line, and a second opening/closing valve installed in a second hydraulic line which is branched from the first hydraulic line and is connected to a rod-side chamber of the boom cylinder, to open and close the second hydraulic line, a first check valve installed in the second hydraulic line between the rod-side chamber and the regeneration valve unit and configured to selectively drain a working oil discharged from the rod-side chamber to the drain tank, and a control unit configured to control opening and closing of the first opening/closing valve, the second opening/closing valve and the first check valve according to a control mode.. . ... Doosan Corporation

05/31/18 / #20180147540

Membrane filtration system and membrane bio reactor including the same

A membrane filtration system and a membrane bio reactor including the same are described. In an example, the membrane filtration system includes: a treatment tank; a membrane support frame disposed in the treatment tank and mounted with a separation membrane; a separation membrane module mounted on the membrane support frame; a vane member disposed at a lower end of the membrane support frame and provided to lift sludge accumulated at a lower part of the treatment tank; and a reciprocating portion connected to the membrane support frame and reciprocating the membrane support frame, in which the separation membrane module includes an upper frame and a lower frame and a hollow fiber membrane installed between the upper frame and the lower frame.. ... Doosan Corporation

05/31/18 / #20180147539

Membrane filtration system and membrane bio reactor including the same

A membrane filtration system and a membrane bio reactor including the same are described. In an example, the membrane filtration system includes: a treatment tank; a membrane support frame disposed in the treatment tank and mounted with a filtration membrane; a reciprocating portion connected to the membrane support frame and reciprocating the membrane support frame; a sliding portion disposed in the treatment tank, connected to the reciprocating portion, and guiding a moving direction of the membrane support frame; and a sludge lifting portion flexibly disposed at a lower end of the membrane support frame to lift sludge accumulated at a lower part of the treatment tank.. ... Doosan Corporation

05/31/18 / #20180147538

Membrane filtration system and membrane bioreactor including the same

A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath, and a control part controlling a reciprocating distance or frequency of the separation membrane module.. . ... Doosan Corporation

05/31/18 / #20180147537

Membrane filtration system and membrane bioreactor including the same

A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, and a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath, and a filtered-water discharge part discharging filtered water that has been filtered via the separation membrane module. The filtered-water discharge part is formed to be movable or stretchable in response to a reciprocating motion of the membrane support frame.. ... Doosan Corporation

05/31/18 / #20180147536

Membrane filtration system and membrane bioreactor including the same

A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, and a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath. The separation membrane module includes an upper frame, a lower frame, and a hollow fiber membrane provided between the upper frame and the lower frame.. ... Doosan Corporation

05/24/18 / #20180143099

Pipe testing apparatus and method

A pipe testing apparatus is described. The apparatus comprises two pipe end holders, respectively to hold a first and a second end of a pipe section under test; a reeling former; a straightening former; and a translator to effect relative translational movement of the pipe and the reeling former and of the pipe and the straightening former to cause the pipe to move selectively into and out of contact with and to apply a contact force against one or other of the reeling former and the straightening former. ... Doosan Corporation

05/24/18 / #20180142581

Supercritical co2 generation system for parallel recuperative type

A supercritical co2 generation system for a parallel recuperative type capable of improving generation efficiency and saving costs is disclosed. According to the supercritical co2 generation system according to the exemplary embodiment, a compression ratio of a turbine can be increased by arranging recuperators in parallel, thereby maximizing work of the turbine.. ... Doosan Corporation

05/24/18 / #20180142317

Hot mold steel for long life cycle die casting having high thermal conductivity and method for preparing the same

According to an embodiment, the described hot mold steel may be excellent in high thermal conductivity to decrease the temperature difference in materials at high temperature, thereby making heat-checking properties excellent. When the hot mold steel according to the present disclosure is used for die casting, the cooling rate of the product produced using the die casting is quick, thereby improving the physical properties of the produced product and shortening the cooling time to improve productivity. ... Doosan Corporation

05/17/18 / #20180136641

Fault signal recovery apparatus and method

A fault signal recovery apparatus and method for collecting signals obtained in a plant and recovering normal signals from fault signals contained in the measured signals through a machine learning method includes receiving an input x including only normal signals for a plurality of tags, an input u including fault signals for a first group of tags among the plurality of tags and normal signals for a second group of tags, and an input s having information on the first group of tags including fault signals, and estimating and recovering normal signals for the first group of tags including fault signals based on feature information f, recovery model information p, and ensemble learning.. . ... Doosan Corporation

05/17/18 / #20180135466

Gas turbine and method for replacing bearing thereof

A gas turbine and a method for replacing a bearing thereof to easily adjust a clearance of a bearing housing and a bearing covering a tie rod, such that the bearing can be easily replaced is disclosed.. . ... Doosan Corporation

05/17/18 / #20180135416

Gas turbine

A gas turbine includes a compressor rotor having a plurality of compressor rotor disks installed therein; a turbine rotor having a plurality of turbine rotor disks installed therein; a connection part connecting the compressor rotor and the turbine rotor to each other; a tie rod extended through the central axes of the plurality of compressor rotor disks and the central axes of the plurality of turbine rotor disks; and a clamping member forced onto the tie rod in the an axial direction of the tie rod so as to be rotated with the tie rod, and relatively rotated with respect to the an inner circumferential surface of the connection part, thereby damping vibration and shock.. . ... Doosan Corporation

05/10/18 / #20180128127

Flow guide structure for casing flange, and casing and turbomachine having the same

A flow guide structure for a casing flange, and a casing and a turbomachine having the same, include a flange portion connecting an upper casing and a lower casing and a flow guide positioned at the flange portion to guide fluid to flow close to the flange portion, whereby steam flow resistance is reduced around an inner casing flange of a turbine and the steam flow is smoothed.. . ... Doosan Corporation

05/10/18 / #20180128114

Structure for cooling rotor of turbomachine, rotor and turbomachine having the same

The present invention relates to a structure for cooling a turbomachine's rotor part and a rotor and a turbomachine having the same. The structure for cooling a turbomachine's rotor part includes: a dovetail joint part disposed along an outer circumferential surface of a rotor wheel and having a plurality of mounting grooves in which dovetails of buckets are mounted and cooling slots disposed along the outer circumferential surface of the rotor wheel on the dovetail joint part and having a cooling fluid flowing therethrough.. ... Doosan Corporation

05/10/18 / #20180126391

Flocculation basin inclusion or exclusion type water treatment apparatus using dissolved air flotation

Disclosed herein is a flocculation basin inclusion ion type water treatment apparatus using dissolved air floatation which includes: a flocculation basin which forms flocs by mixing a coagulant inserted into feed water and grows up the flocs; a contact zone to which fine bubbles are induced through a nozzle disposed at a lower part; and a separation zone which removes the flocs when the fine bubbles are attached to the flocs and the flocs float on the surface of water, the flocculation basin inclusion type water treatment apparatus including: a fine bubble forming part.. . ... Doosan Corporation

05/03/18 / #20180122524

Digital protection system for nuclear power plant

A digital protection system is provided. The digital protection system may include: a process protection system including at least two channels, each channel including a first bistable logic controller and a second bistable logic controller which are independent and different from each other, the first bistable logic controller and the second bistable logic controller outputting bistable logic results; a reactor protection system including at least two trains, each train including a first coincidence logic controller and a second coincidence logic controller which are independent and different from each other, the first coincidence logic controller and the second coincidence logic controller outputting coincidence logic results by receiving the bistable logic results from the process protection system; and an initiation circuit normally operating or stopping a reactor according to the coincidence logic results received from the reactor protection system.. ... Doosan Corporation

05/03/18 / #20180117534

Membrane bioreactor system using reciprocating membrane

The present invention relates to membrane bioreactor (“mbr”) system that includes a mechanical membrane reciprocation system to reduce or eliminate membrane fouling. The disclosed mbr system can be operated with higher flux and lower fouling than mbr systems using air scouring. ... Doosan Corporation

05/03/18 / #20180117531

Submerged membrane filtration system using reciprocating membrane

Provided is a reciprocating submerged membrane filtration apparatus including: a membrane tank comprising a submerged membrane and configured to intake influent wastewater to be treated, the influent wastewater being filtered through the submerged membrane to produce treated water; and a reciprocation apparatus configured to move the membrane to create an inertia force which shakes foulants off from the submerged membrane under oxygen-deficient conditions, wherein the submerged membrane comprises a microfiltration (mf) membrane or an ultrafiltration (uf) membrane.. . ... Doosan Corporation

04/19/18 / #20180106164

Gas turbine

A gas turbine comprises a strut assembly including an inner ring; an inclined member including a first end connected to the inner ring, a second end positioned opposite the first end, and a flange extending radially inward from the second end; an oil sump mounted to the second end or the flange; a thrust bearing fixed to the oil sump; and a thrust collar extending radially from a rotor, wherein the inclined member has an aperture portion formed therein, the aperture portion is positioned in an upper portion of a region between the thrust bearing and a journal bearing, and the aperture portion has a width and a circumferential length greater than at least the journal bearing. The gas turbine has the feature that the journal bearing is easily withdrawn and the total weight of the gas turbine is reduced.. ... Doosan Corporation

04/05/18 / #20180094815

Damping liner cap and gas turbine combustor

A gas turbine combustor includes a combustion chamber, a liner adjacent to the combustion chamber, a liner cap capping the combustion chamber, and a swirler cup passing through the liner cap. The liner cap includes a first cavity having a first inlet receiving an air, a second cavity having a first outlet facing the combustion chamber, and an impingement plate between the first cavity and the second cavity. ... Doosan Corporation

04/05/18 / #20180094547

Hybrid power generation system

Disclosed herein is a hybrid power generation system. The hybrid power generation system may enhance efficiency of production of electricity and heating heat by integrating power generation using supercritical carbon dioxide (co2) and cogeneration.. ... Doosan Corporation

04/05/18 / #20180094406

Control system for construction machinery and control method for construction machinery

A control system for construction machinery includes a first hydraulic pump, first and second actuators connected to the first hydraulic pump through first and second hydraulic lines respectively, first and second control valves installed in the first and second hydraulic lines respectively and configured to control operations of the first and second actuators, and a controller configured to adjust a spool displacement amount of the first control valve according to an amount of working oil to be supplied to the first actuator when the first actuator performs a single or multiple operation by self-load.. . ... Doosan Corporation

03/29/18 / #20180087408

Hybrid type power generation system

A hybrid type power generation system in which some of components of a cogeneration system are combined with a supercritical co2 power generation system, may increase an energy output by combining some of the components of the cogeneration system with the supercritical co2 power generation system.. . ... Doosan Corporation

03/15/18 / #20180077574

Data transmission apparatus and method

A data transmission method includes requesting, by a plurality of transceivers, an authentication to a main controller, transmitting an authentication acceptance signal and separate decoding keys from the main controller to the transceivers, transmitting an encoded data bundle from the main controller to the transceivers and extracting, by each of the transceivers, some of data in the at least one encoded data bundle using the decoding key.. . ... Doosan Corporation

03/15/18 / #20180073969

Apparatus and method for determining chemical input

An apparatus and method for determining an amount of chemical input, and more particularly to an apparatus and method for determining the amount of a chemical to be added, which is necessary to achieve target water quality, wherein a required chemical concentration can be accurately calculated based on the temperature of the water and the target turbidity of the water includes an information-receiving unit configured to receive at least one of environmental information, chemical information, and water-quality information of the water present in a specific area and a chemical input determination unit configured to derive a multiple regression equation based on the received environmental information, chemical information, and water-quality information and to determine the future input of a chemical that is added to satisfy a target turbidity of the water present in the specific area based on the multiple regression equation.. . ... Doosan Corporation

03/15/18 / #20180073728

Downshot burner

A burner outlet set for a downshot firing burner is described comprising a first outlet array having at least one primary outlet, and at least one vent air outlet disposed either side of the primary outlet in an array direction of the first outlet array; second and third outlet arrays each comprising an array of secondary air outlets, respectively disposed either side of the a first outlet array. A burner system with a plurality of such burner outlet sets, a burner arch configured for downshot firing and having one or more such burner sets, and a combustion furnace with one or more such arches are also described.. ... Doosan Corporation

03/15/18 / #20180073724

Influence analyzing apparatus for analyzing influence of combustibles

A apparatus may extract temperature for each region of a feed water and steam system of a thermoelectric power plant with respect to a combustible combination including one or more combustibles, extract one or more vectors for each region from the temperatures extracted for each region, generate one or more combustible clusters, each cluster including one or more combustible combinations having similar properties from the extracted vectors, and extract a characteristic component of a combustible combination that increases or decreases a boiler performance index from among one or more combustible combinations included in the one or more combustible clusters.. . ... Doosan Corporation

03/15/18 / #20180073555

Thrust bearing assembly

Provided is a thrust bearing assembly including a casing, a supporting ring positioned within said casing, a leverage mechanism housed within said casing, tilting pads for contacting rotor, supporting discs connecting said leverage mechanism with said tilting pads via openings in said casing, wherein the leverage mechanism includes a plurality of first levering plates and an equal number of second levering plates, the first and second levering plates forming an endless overlapping arrangement within said casing, each first levering plate touching at contact surfaces two second levering plates and vice versa, wherein the levering plates are preferably substantially arcuate-shaped, and wherein at least all first levering plates or at least all second levering plates are tiltingly positioned on supporting pins, whereas the levering plate includes a recess with a ball-shaped protrusion within the recess, and the supporting pin includes a ball-shaped socket fitting the ball-shaped protrusion of the levering plate.. . ... Doosan Corporation

03/15/18 / #20180072588

Apparatus and method for analyzing influence variable on membrane fouling of seawater desalination system

This disclosure relates to an apparatus and method for analyzing an influence variable on membrane fouling of a seawater desalination system, wherein influence variables other than variables having a low degree of influence, among variables affecting the membrane, are selected, and the influence thereof on membrane fouling is used to derive an equation. The apparatus includes a variable storage unit configured to store variables affecting membrane fouling of a seawater desalination system, a dominant variable selection unit configured to select at least one dominant variable among the variables through at least one algorithm, and an equation derivation unit configured to derive a specific equation based on a correlation between the selected dominant variable and the membrane fouling.. ... Doosan Corporation

03/08/18 / #20180067010

Apparatus and method for detecting abnormal vibration in rotor

An apparatus for detecting abnormal vibrations of a rotor includes a vibration information receiver configured to receive at least one type of information among vibration information regarding one or more dimensions distinguishing locations and directions of the rotor and rotor rotation information including a number of rotations of the rotor, a multivariate management index calculator configured to calculate multivariate management indexes from the vibration information regarding the one or more dimensions, and an operation index extractor configured to determine an abnormality in vibration characteristics of the rotor when a hotelling's t-squared value is greater than an upper control limit and extracts an operation index causing the abnormality in the vibration characteristics of the rotor from one or more operation indexes. An abnormal vibration in a rotor is detected based on four-dimensional (4d) vibration information distinguishing locations and directions of the rotor.. ... Doosan Corporation

03/08/18 / #20180066417

Method of controlling a main control valve of an excavator and apparatus for performing the same

In a method of controlling a main control valve of an excavator, when speeds of a boom cylinder and an arm cylinder is increased by handling a boom joystick and an arm joystick, a second arm control spool between a first hydraulic pump and the arm cylinder may be closed. A first boom control spool between the first hydraulic pump and the boom cylinder may be opened to supply a first flux generated from the first hydraulic pump to the boom cylinder. ... Doosan Corporation

03/01/18 / #20180062184

Boron phosphate matrix layer

An illustrative example embodiment of a fuel cell includes a cathode electrode, an anode electrode, and a porous matrix layer between the electrodes. The porous matrix layer includes pores and solids. ... Doosan Corporation

02/22/18 / #20180053960

Fuel cell manifold assembly including a self-supporting polymer material liner

An illustrative example embodiment of a fuel cell manifold device includes a self-supporting polymer material liner body including a generally planar primary wall and a plurality of side walls. The side walls respectively extend generally perpendicularly from the primary wall. ... Doosan Corporation

02/22/18 / #20180053954

Preventing migration of liquid electrolyte out of a fuel cell

An illustrative example cell stack assembly includes a plurality of fuel cells that each include a cathode electrode, an anode electrode and a matrix for holding a liquid acid electrolyte. The electrodes have lateral outside edges that are generally coplanar. ... Doosan Corporation

02/22/18 / #20180053900

Organic compound and organic electroluminescent element comprising same

The present invention relates to a novel organic compound, and an organic electroluminescent element having improved characteristics, such as luminous efficiency, driving voltage, and lifespan, by containing the novel organic compound in one or more organic material layers.. . ... Doosan Corporation

02/22/18 / #20180051570

Gas turbine blade

A gas turbine blade according to an embodiment of the present invention includes a turbine blade provided in a gas turbine; and a plurality of film coolers formed in a section from a leading edge to a trailing edge of the turbine blade, in which the film cooler includes a cooling channel through which cooling air is introduced and formed in an oval shape; and an outlet through which the cooling air passing through the cooling channel is discharged and extending from an extended end of the cooling channel toward an outer side thereof and formed in an oval shape.. . ... Doosan Corporation

02/15/18 / #20180044891

Control system for construction machinery

A control system for construction machinery includes a main control valve installed in a hydraulic line between a hydraulic pump and actuators, and including a first group of electro proportional pressure reducing valves outputting a secondary pressure in proportion to an external pressure command signal to a first spool for controlling a first group of actuators of the actuators, and a second group of electro proportional pressure reducing valves outputting a secondary pressure in proportion to an external pressure command signal to a second spool for controlling a second group of actuators of the actuators, a first pressure sensor configured to detect the secondary pressure outputted from the first group of electro proportional pressure reducing valves and a second pressure sensor configured to detect the secondary pressure outputted from the second group of electro proportional pressure reducing valves, and a controller configured to output pressure command signals to the electro proportional pressure reducing valves corresponding to a manipulation signal of the construction machinery, and configured to compare the secondary pressures detected by the first and second pressure sensors and the pressure command signals to determine to determine whether or not the electro proportional pressure reducing valves fail.. . ... Doosan Corporation

02/08/18 / #20180038333

Construction machine starting assist system

An exemplary embodiment of the present disclosure relates to a construction machine starting assist system including: an engine of a construction machine; an input unit which receives a key-on signal and a key-off signal of the engine; a hydraulic pump which is operated by the engine; an actuator which is operated by hydraulic oil discharged from the hydraulic pump; a regeneration valve which is switched so that a part or an entirety of the hydraulic oil returned from the actuator and a part or an entirety of the hydraulic oil discharged from the hydraulic pump are supplied for regeneration; an accumulator which is charged with the hydraulic oil supplied from the regeneration valve; a charging valve which is controlled so that the hydraulic oil is discharged from the accumulator when the key-on signal is inputted into the input unit; and a hydraulic motor which is operated by the hydraulic oil discharged from the charging valve, in which the hydraulic motor is connected to the engine and assists in starting the engine.. . ... Doosan Corporation

02/08/18 / #20180037478

Capacitive deionization electrode module and water treatment apparatus and method capable of saving energy using the same

The present invention relates to a capacitive deionization electrode module, a water treatment apparatus and method capable of saving energy using the same, and more particularly, to a capacitive deionization electrode module that is capable of improving durability, suppressing fouling, and increasing the amount of incoming water treated and to a water treatment apparatus and method that is capable of recovering and reusing energy generated while a saline adsorbed to the capacitive deionization electrode module is being desorbed through an energy recovery device, thereby saving the energy.. . ... Doosan Corporation

02/01/18 / #20180029136

Machine tool

The present invention relates to a machine tool including a ram spindle and a tool holder, and provides a machine tool comprising: a tool holder including at least two inserts; and a ram spindle capable of fixing the tool holder in a clamped state or rotating the tool holder in order to change the position of the insert, such that the position of the insert can be quickly changed, thereby enabling an improvement in productivity and precision and a reduction in product costs.. . ... Doosan Corporation

02/01/18 / #20180028945

Fiber filtering apparatus

A fiber filtering apparatus includes: an enclosure including an upper box and a lower box communicating with the upper box; a strainer installed in the upper box along a longitudinal direction; a plurality of fiber yarn media configured to be fixed to upper and lower fixing means each coupled to upper and lower parts of the strainer; a plurality of fiber ball media configured to be embedded in the lower box to form a second filtering layer; a first pipe configured to be formed on one side wall on the lower part of the upper box and introduced with raw water during filtration and drain backwashing water during backwashing; and a second pipe formed on one side wall on a lower part of the lower box and drain filtered water during the filtration and introduced with washing water during the backwashing.. . ... Doosan Corporation

01/18/18 / #20180019029

Apparatus and system for simulating maintenance of reactor core protection system

A system for simulating maintenance of a reactor core protection system that has at least two or more channels, includes: a simulation signal generation unit for generating a simulation state signal including a normal state or an abnormal state, a communication unit connected to each of the channels of the reactor core protection system to transmit the state signal to the channel, and a control unit for receiving a result signal output from the channel in response to the input simulation state signal and confirming whether the reactor core protection system normally determines a reactor core state by analyzing the result signal.. . ... Doosan Corporation

01/18/18 / #20180015551

Five-axis processing machine

The present invention relates to a five-axis machining apparatus. A five-axis machining apparatus according an embodiment of the present invention includes: a column; a slide coupled to the column so as to be slidable in a vertical direction; a main spindle drive unit supported on the back of the slide; and a tiltable spindle module detachably coupled to the front of the slide, and configured to receive rotation power from the main spindle drive unit.. ... Doosan Corporation

01/18/18 / #20180015499

System for coating heat transfer tube for condenser

A system for coating a heat transfer tube for a condenser is disclosed. The system simplifies a process of coating the heat transfer tube, and is able to uniformly coat a plurality of heat transfer tubes. ... Doosan Corporation

01/11/18 / #20180013072

Organic electroluminescent element

The present invention provides an organic electroluminescent element which comprises: an anode; a cathode; and an organic layer interposed between the anode and the cathodes, wherein the organic layer comprises one or more types of layer from the group consisting of a hole-injection layer, hole-transport layer, light-emitting layer, lifetime enhancement layer, electron-transport layer, and electron-injection layer.. . ... Doosan Corporation

01/11/18 / #20180010461

Disk assembly and turbine including the same

A disk assembly may include: a first disk engaged with a compressor section of a gas turbine; a second disk engaged with a turbine section of the gas turbine; and a third disk disposed between the first and second disks, and transferring torque applied to the second disk to the first disk. The third disk has a plurality of legs formed on an inner circumferential surface thereof, the plurality of legs being in contact with an outer circumferential surface of a tie bolt of the gas turbine.. ... Doosan Corporation

01/04/18 / #20180003219

Ball-socket type tilting pad journal bearing

A ball-socket type tilting pad journal bearing configured to reduce friction between a tilting pad and a pivot includes a housing body, a plurality of tilting pads disposed inside the housing body, and a plurality of pivots fixed on an inner surface of the housing body. An oil collection unit for collecting oil is provided in at least one of an outer circumferential surface of each of the pivots and a socket of each of the tilting pads.. ... Doosan Corporation

01/04/18 / #20180003062

Gas turbine blade

A gas turbine blade includes a plurality of guide ribs spaced apart from each other in a movement direction of a cooling fluid in order to guide movement of the cooling fluid flowing along a cooling passage formed in the turbine blade, and an opening formed in each of the guide ribs in order to guide a portion of the cooling fluid to a bottom of the cooling passage between the guide ribs or to side walls adjacent to the bottom.. . ... Doosan Corporation








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