Patents Assigned to MITSUBISHI POWER, LTD.
  • Publication number: 20220349346
    Abstract: An acoustic attenuator comprises a first attenuation unit, a second attenuation unit, a welded section, and a communication part. A first acoustic damper is provided on an outer surface of a first acoustic liner, which faces toward a side opposite from an object, to form a first damper space that communicates with an internal space of the object. The second attenuation unit is attached to an outer surface of the object. The welded section is provided at least between the first acoustic damper and a second acoustic damper. The welded section secures the second attenuation unit to the first acoustic liner. The communication part is disposed in a position farther from an outer surface of the object than the welded section, allowing communication between the first damper space and a second damper space.
    Type: Application
    Filed: July 28, 2020
    Publication date: November 3, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventors: Hirokazu Shiraishi, Tatsuya Nadayoshi, Kentaro Murakami
  • Patent number: 11441428
    Abstract: A turbine blade includes an airfoil portion having a pressure surface and a suction surface each of which extends between a leading edge and a trailing edge, and a platform including an end wall to which a base-end portion of the airfoil portion is connected. The end wall includes a concave portion on suction surface disposed at least in a region of suction surface of the end wall, and a convex portion on pressure surface disposed at least in a region of pressure surface of the end wall. The concave portion on suction surface has a bottom point located on an axially upstream side of a tangent point on the suction surface, the suction surface having a tangential line extending in an axial direction through the tangent point.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: September 13, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Shigeki Senoo, Kazuhiro Momma, Reza Abhari, Anestis Kalfas, Ilias Papagiannis, Vahid Iranidokht
  • Patent number: 11441774
    Abstract: A method for operating a flue gas purification system, comprising, in the flue gas purification system, equipped with a boiler which can burn oil fuel and coal fuel either simultaneously or switching therebetween, a denitration equipment having a reducing agent injector and a catalytic reactor, an inlet flue to guide flue gas discharged from the boiler to the denitration equipment, an outlet flue to guide flue gas discharged from the denitration equipment, a bypass flue which can guide flue gas from the inlet flue to the outlet flue so as to bypass the denitration equipment, and a bypass damper, opening the bypass damper and burning oil fuel in the boiler being in condition not yet suitable for coal combustion to allow the flue gas discharged from the boiler to dividedly flow to the denitration equipment and the bypass flue, switching the oil fuel to coal fuel when the boiler is in condition suitable for coal combustion to burn the coal fuel in the boiler, closing the bypass damper after switching the oil fue
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: September 13, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Shinya Ii, Akira Hirota, Satoru Shishido, Katsuhiro Yashiro, Hiroyuki Yoshimura, Nobuaki Shimizu
  • Patent number: 11437634
    Abstract: A fuel cell system that comprises an SOFC that generates power as a result of an oxide gas being supplied to an air electrode and a fuel gas being supplied to a fuel electrode, a plurality of exhaust fuel gas discharge lines that discharge, into the atmosphere, exhaust fuel gas that has been discharged from the fuel electrode, exhaust fuel gas discharge valves that are respectively provided to the plurality of exhaust fuel gas discharge lines, a plurality of exhaust oxide gas discharge lines that discharge, into the atmosphere, exhaust oxide gas that has been discharged from the air electrode, exhaust oxide gas discharge valves that are respectively provided to the plurality of exhaust oxide gas discharge lines, and a control device that, when stopping the SOFC, closes the exhaust oxide gas discharge valves before the exhaust fuel gas discharge valves.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: September 6, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Hiroki Irie, Takuma Nagai
  • Patent number: 11428409
    Abstract: A combustor includes: a fuel nozzle for injecting fuel; a combustion liner surrounding a combustion space for combusting the fuel and having an internal passage having an outlet communicating with the combustion space; and an air-fuel mixture line, connected to an inlet of the internal passage of the combustion liner, for introducing an air-fuel mixture containing the fuel and compressed air to the internal passage. The combustion liner is configured to be cooled by the air-fuel mixture flowing through the internal passage.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: August 30, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Kei Inoue, Keijiro Saito, Yuichi Ichikawa
  • Publication number: 20220259982
    Abstract: A seal member is disposed between a rotor and a stator to provide a seal between the rotor and the stator. The seal member comprises: a rotary-side member fixed to a surface of the rotor opposing the stator; a fixed-side member fixed to the stator and facing the rotary-side member; and a first fin and a second fin which are disposed on one of the rotary-side member and the fixed-side member, the first fin protruding on the opposing surface side, the second fin being disposed on a lower pressure side in a rotating axis direction relative to the first fin and protruding on the opposing surface side. The thickness, in the rotating axis direction, of the second fin at the root thereof is greater than the thickness, in the rotating axis direction, of the first fin at the root thereof.
    Type: Application
    Filed: July 16, 2020
    Publication date: August 18, 2022
    Applicant: MITSUBISHI POWER, LTD
    Inventors: Tatsuro Furusho, Shin Nishimoto, Hidekazu Uehara, Kohei Ozaki, Azumi Yoshida
  • Patent number: 11415078
    Abstract: In the present invention, a coal gasification combined power generation facility comprises: a feed water supply line (72); a condensate pump (39) and an intermediate-pressure feed water pump (40); a turbine bypass line (32) that bypasses a steam turbine and supplies steam to the condenser (73); and a spray water line (76) that supplies the feed water to the turbine bypass line (32). The coal gasification combined power generation facility has a normal operation mode and a bypass operation mode, and in the bypass operation mode, a control device (80) supplies the feed water to the turbine bypass line (32) and performs a first opening degree control to control the opening degree of the supply adjustment valve so that the amount of feed water supplied to the exhaust heat recovery boiler becomes less than that in the normal operation mode.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: August 16, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Tomoya Hayashi, Jun Taguchi, Satoru Matsuo, Kei Moriyama, Ken Tamura, Kentaro Nakamura, Yuji Ohta
  • Publication number: 20220235674
    Abstract: This steam turbine is provided with: a steam turbine rotor which extends in an axial direction; a pair of bearings which support the steam turbine rotor in such a way as to be capable of rotating about the axial direction; a steam turbine casing which encloses the steam turbine rotor between the pair of bearings; a casing support unit which supports the steam turbine casing from below; and a first heating unit: which is provided on the casing support unit and which is capable of heating the casing support unit.
    Type: Application
    Filed: August 18, 2020
    Publication date: July 28, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventors: Makoto Kondo, Katsuhisa Hamada
  • Publication number: 20220236232
    Abstract: An ultrasonic inspection device is an device for ultrasonically inspecting a rotor disc. The ultrasonic inspection device includes: an inspecting portion that has an ultrasonic probe for transmitting an ultrasonic wave to a disc surface of the rotor disc; a first magnet that movably holds the ultrasonic probe relative to the disc surface of the rotor disc; a drive wheel that causes the ultrasonic probe to move in a direction that intersects a radial direction of the rotor disc; a steering wheel that adjusts a moving direction of the drive wheel; a stroke sensor that detects the radial position of the ultrasonic probe being held relative to the disc surface; and a control device that controls the steering wheel on the basis of information detected by the stroke sensor such that the radial position of the ultrasonic probe falls within a predetermined range.
    Type: Application
    Filed: May 18, 2020
    Publication date: July 28, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventors: Masakazu Kamibayashi, Atsushi Sugiura, Takuro Masuda
  • Publication number: 20220228510
    Abstract: A steam turbine stator vane includes a vane body portion which has a vane surface including a pressure surface and a suction surface, a moisture removal channel disposed in the vane body portion, at least one slit opening to the vane surface to communicate with the moisture removal channel and extending along a height direction from a base end portion toward a tip end portion of the vane body portion, and at least one groove portion disposed in the vane surface and extending from the base end portion along the height direction, at least a part of the at least one groove portion overlapping the at least one slit along the height direction.
    Type: Application
    Filed: May 1, 2020
    Publication date: July 21, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventors: Ryo Takata, Yasuhiro Sasao, Naoto Tochitani, Soichiro Tabata
  • Patent number: 11384645
    Abstract: A turbine wheel is provided with a groove having a bottom surface and a pair of side wall surfaces. The turbine wheel includes: a balance weight that is arranged in the groove, is insertable from any circumferential position of the opening of the groove, and has a through-hole opened toward one of the pair of side wall surfaces; and a retaining member that contacts the one of the pair of side wall surfaces in a state of being inserted in the through-hole of the balance weight, to thereby cause the balance weight to abut against the other one of the pair of side wall surfaces and be retained in the groove. The groove has engagement recesses provided at intervals in a circumferential direction at the bottom surface or an engagement protrusion fitted to one of fitting recesses provided at intervals in the circumferential direction at the bottom surface and protruding from the bottom surface.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: July 12, 2022
    Assignee: Mitsubishi Power, Ltd.
    Inventors: Shosaku Hiwatashi, Yasuyuki Watanabe, Tadashi Murakata, Yoshiki Sakamoto
  • Patent number: 11384933
    Abstract: A burner device includes a burner body which includes a protruding portion protruding from a furnace wall into an interior of a combustion furnace, a cooling pipe through which a refrigerant for cooling the burner body flows, the cooling pipe being disposed so as to surround an outer peripheral surface of the protruding portion, and a light detection unit for detecting internal light of the cooling pipe.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: July 12, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Yoshinori Koyama, Katsuhiko Yokohama, Yasunari Shibata
  • Patent number: 11384938
    Abstract: To provide a burner that makes it possible to reduce error displacement of the distal end position of a burner main body when the burner main body is inserted. A burner (161) includes: a burner main body (162); a plurality of driving cylinders (163) that are disposed parallel to a direction of an axis line in which the burner main body (162) moves, and drive movement of the burner main body (162); a connecting member that connects the burner main body (162) and the plurality of driving cylinders (163); and a fitting member (170) that is provided between the burner main body (162) and the connecting member, and constrains relative movement in the direction of the axis line (X) and permits relative movement in a direction perpendicular to the direction of the axis line (X).
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: July 12, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Kohei Matsuo, Keisuke Matsuo, Shinya Hamasaki
  • Publication number: 20220213818
    Abstract: A gas turbine combined-cycle power plant comprising a gas turbine engine comprising a compressor for generating compressed air, a combustor that can receive a fuel and the compressed air to produce combustion gas and a turbine for receiving the combustion gas and generating exhaust gas; a heat recovery steam generator for generating steam from water utilizing heat from the exhaust gas; a steam turbine for producing power from the steam generated by the heat recovery steam generator; a fuel regasification and expansion system in fluid communication with and disposed downstream of the fuel regasification and expansion system for producing power from gasified fuel; and a fuel expansion turbine in fluid communication with and disposed downstream of the fuel regasification and expansion system for producing power from gasified fuel. In examples, the power plant can include an Organic Rankine Cycle (ORC) using heat input from the heat recovery steam generator.
    Type: Application
    Filed: May 10, 2019
    Publication date: July 7, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventor: Benjamin Shimin Deng
  • Patent number: 11376681
    Abstract: A method of forming a curved-shaped processing hole in a workpiece by electromechanical machining includes a step of feeding an electrolytic solution through an inner channel of a processing electrode and jetting the electrolytic solution from an outlet opening of the inner channel disposed on a tip surface of the processing electrode, a step of applying a potential difference between the processing electrode and the workpiece while jetting the electrolytic solution from the outlet opening of the processing electrode, and a step of forming the curved-shaped processing hole in the workpiece. In the jetting step, at least one of a current density distribution on the tip surface of the processing electrode or a flow velocity distribution of the electrolytic solution jetted from the outlet opening is eccentric to a downstream side of a curving direction of the processing hole with respect to an axial center of the tip surface.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: July 5, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Kota Matsumoto, Masako Idota, Takuro Hashimoto
  • Publication number: 20220205395
    Abstract: This fuel gas supply device and method comprises: a fuel gas supply line (L3) that connects a fuel gas supply source (100) and a combustor (12); a fuel gas compressor (24) that is provided to the fuel gas supply line (L3) and compresses fuel gas; a pressure detector (32) that detects a pressure (P2) of fuel gas which is introduced to the fuel gas compressor (24); and a pressure reducing valve (23) that is provided upstream from the fuel gas compressor (24) of the fuel gas supply line (L3) and that adjusts the pressure of the fuel gas so that a pressure (P1) of the fuel gas which is detected by the pressure detector (32) attains a certain target suction pressure consisting of a rated discharge pressure of the fuel gas compressor (24).
    Type: Application
    Filed: April 8, 2020
    Publication date: June 30, 2022
    Applicant: MITSUBISHI POWER, LTD.
    Inventors: Yosuke Fujitomi, Tetsuya Igarashi, Yuusuke Kawasaki
  • Patent number: 11371707
    Abstract: A combustor includes: a casing having an air chamber filled with air; at least one mixing passage forming member forming at least one mixing passage which is connected at an inlet side to the air chamber and at an outlet side to a combustion chamber and having an inlet at the inlet side of the at least one mixing passage so as to communicate with the air chamber; and at least one fuel nozzle disposed inside the air chamber and having a fuel injection hole, positioned upstream of the inlet of the at least one mixing passage forming member, for injecting fuel downstream.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: June 28, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Katsuyoshi Tada, Keijiro Saito, Satoshi Tanimura
  • Patent number: 11364467
    Abstract: Provided is a desulfurization device that allows for the easy and accurate disposition of a spray pipe inside an absorption tower. Provided is a desulfurization device including: an absorption tower (10); and a spray pipe (20) disposed inside the absorption tower (10). The spray pipe (20) includes: a cylindrical pipe portion (21), the leading end of which is closed; and an attachment flange (24) attached to the pipe portion (21). The absorption tower (10) includes: an opening hole (14e) opening toward the side; and a flange (14a) disposed around the opening hole (14e). The attachment flange (24) and the flange (14a) are detachably attached.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: June 21, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Satoru Sugita, Tetsu Ushiku, Ryozo Sasaki, Naoyuki Yoshizumi, Tsuyoshi Miyachi, Seiji Kagawa
  • Publication number: 20220186628
    Abstract: A rotating machine includes a casing having a hollow shape; a rotator rotatably supported in the casing; a stator blade fixed to an inner peripheral portion of the casing; a rotor blade fixed to an outer peripheral portion of the rotator while being displaced from the stator blade in an axial direction of the rotator; a sealing device disposed between the inner peripheral portion of the casing and a tip of the rotor blade; a swirling flow generation chamber provided along a circumferential direction of the rotator on a downstream side of the sealing device in the casing in a fluid flow direction; and guiding members provided at predetermined intervals in the swirling flow generation chamber in the circumferential direction of the rotator. The guiding members each include a first guiding surface that is inclined in the circumferential direction with respect to the axial direction of the rotator.
    Type: Application
    Filed: November 13, 2019
    Publication date: June 16, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventors: Yoshihiro Kuwamura, Chongfei Duan, Hideaki Sugishita, Kazuyuki Matsumoto, Hideki Ono, Kiyoshi Segawa, Hisataka Fukushima
  • Patent number: D960833
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: August 16, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Masahiro Murata, Eiichi Tsutsumi