Patents by Inventor Takeshi Kudo

Takeshi Kudo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220162949
    Abstract: Water droplets that are moved on blade surfaces of a rotor blade are effectively guided toward the blade trailing edge while influence on the strength of the rotor blade is suppressed. A steam turbine rotor blade having a tie-boss for joining to adjacent blades at an intermediate position in the blade length direction is provided. The steam turbine rotor blade includes an airfoil part in which a blade surface is partly hollow as viewed in a section obtained by cutting by an orthogonal plane to a rotation center line of a turbine and a recessed blade surface that is this hollow partial blade surface passes through the blade root side of the tie-boss at least in a region on the pressure side and extends in a strip shape in the blade chord length direction.
    Type: Application
    Filed: November 19, 2021
    Publication date: May 26, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yasuhiro Sasao, Soichiro Tabata, Ryo Takata, Takeshi Kudo
  • Publication number: 20220159791
    Abstract: This high-frequency hardening apparatus is provided with: an induction heating coil which has a U-shaped part that sandwiches a turbine blade, a pair of linear parts, and a connection part connecting the U-shaped part and the linear parts; a temperature detection unit which detects, in a non-contact manner, temperature around the induction heating coil; a moving mechanism which relatively moves the turbine blade and the induction heating coil in the direction of blade height; an electrical current supply unit which supplies a high-frequency electrical current to the induction heating coil; and a control device which has an electrical current control unit that, on the basis of a detection value provided by the temperature detection unit, controls the magnitude of the high-frequency electrical current supplied from the electrical current supply unit such that the detection value will not exceed a predetermined temperature.
    Type: Application
    Filed: June 26, 2020
    Publication date: May 19, 2022
    Inventors: Kunio ASAI, Keiko SHISHIME, Shuichi ISHIZAWA, Takeshi KUDO, Yurika NAGAI, Katsumi TANAKA
  • Publication number: 20220018263
    Abstract: A stator blade heating system is to heat a hollow stator blade of a steam turbine, and includes: an electromagnetic coil disposed within a hollow portion of the stator blade; and a heating device electrically connected to the electromagnetic coil and capable of supplying an alternating current to the electromagnetic coil. A core wound with the electromagnetic coil is disposed within the hollow portion of the stator blade. The stator blade heating system further includes a regulator that regulates output of the alternating current of the heating device, and a temperature sensor that detects temperature of the stator blade. The regulator regulates the output of the heating device on the basis of the temperature detected by the temperature sensor.
    Type: Application
    Filed: July 14, 2021
    Publication date: January 20, 2022
    Inventors: Yurika SEO, Yasuhiro SASAO, Takeshi KUDO
  • Patent number: 11203941
    Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof, and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: December 21, 2021
    Assignee: Mitsubishi Power, Ltd.
    Inventors: Susumu Nakano, Koji Ishibashi, Shunsuke Mizumi, Masaki Matsuda, Takeshi Kudo
  • Patent number: 11047495
    Abstract: A fluid control valve includes a valve unit, a valve casing, and a secondary molded member. The valve casing houses the valve unit therein and includes a first connection pipe part and a second connection pipe part. The first connection pipe part has a hollow pipe shape with a first engagement part. The second connection pipe part has a hollow pipe shape with a second engagement part. The first connection pipe part is connected to the second connection pipe part. The secondary molded member is made of a resin material and covers the first engagement part and the second engagement part to prevent the first connection pipe part from being detached from the second connection pipe part.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: June 29, 2021
    Inventors: Katsuhiko Makino, Shinji Murai, Yasuhiro Tsuzuki, Naoya Sugiyama, Takeshi Kudo
  • Publication number: 20200408098
    Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof, and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.
    Type: Application
    Filed: September 10, 2020
    Publication date: December 31, 2020
    Inventors: Susumu NAKANO, Koji ISHIBASHI, Shunsuke MIZUMI, Masaki MATSUDA, Takeshi KUDO
  • Patent number: 10794196
    Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: October 6, 2020
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Susumu Nakano, Koji Ishibashi, Shunsuke Mizumi, Masaki Matsuda, Takeshi Kudo
  • Publication number: 20190376607
    Abstract: A fluid control valve includes a valve unit, a valve casing, and a secondary molded member. The valve casing houses the valve unit therein and includes a first connection pipe part and a second connection pipe part. The first connection pipe part has a hollow pipe shape with a first engagement part. The second connection pipe part has a hollow pipe shape with a second engagement part. The first connection pipe part is connected to the second connection pipe part. The secondary molded member is made of a resin material and covers the first engagement part and the second engagement part to prevent the first connection pipe part from being detached from the second connection pipe part.
    Type: Application
    Filed: May 29, 2019
    Publication date: December 12, 2019
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Katsuhiko MAKINO, Shinji MURAI, Yasuhiro TSUZUKI, Naoya SUGIYAMA, Takeshi KUDO
  • Patent number: 10378388
    Abstract: An exhaust hood for a steam turbine includes a bearing cone; an annular flow guide; and an external casing surrounding the bearing cone and the flow guide. Meridional shapes of the flow guide at respective circumferential positions are shapes obtained by rotating one representative shape around an upstream end of the representative shape in a meridional plane and by reducing or maintaining a radial length of the representative shape. A circumferential distribution of inclination angles of an upstream end of the flow guide with respect to a center axis of a turbine rotor of the steam turbine has representative inclination angles at respective representative positions in the circumferential direction. The circumferential distribution between the representative positions is defined by a linear interpolation. Each representative position is a position where the inclination angles change from increasing or decreasing to decreasing or increasing, or from constant to increasing or decreasing.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: August 13, 2019
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Hideki Ono, Shunsuke Mizumi, Takeshi Kudo, Tatsuhito Hattori
  • Patent number: 10301970
    Abstract: An axial turbine includes an upstream turbine stage that includes: a cover disposed at a distal end of an upstream bucket and opposed to an inner wall of an upstream diaphragm outer ring across a gap; and a downstream diaphragm outer ring that is disposed downstream of the upstream turbine stage and that has an inner peripheral-side end wall shaped into a flare. The inner peripheral-side end wall of the downstream diaphragm outer ring has a flare angle formed to be greater than a slant angle of an inner peripheral-side wall of the cover. In the axial turbine, the inner peripheral-side end wall of the downstream diaphragm outer ring is formed to have a meridional shape that has at least one inflection point between the upstream turbine stage and a downstream turbine stage and such that a tangent at the inflection point with respect to a steam flow direction has a positive gradient.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: May 28, 2019
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Hisataka Fukushima, Takeshi Kudo, Shigeki Senoo, Hideki Ono
  • Publication number: 20190078448
    Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.
    Type: Application
    Filed: November 8, 2018
    Publication date: March 14, 2019
    Inventors: Susumu NAKANO, Koji ISHIBASHI, Shunsuke MIZUMI, Masaki MATSUDA, Takeshi KUDO
  • Patent number: 10145248
    Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: December 4, 2018
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Susumu Nakano, Koji Ishibashi, Shunsuke Mizumi, Masaki Matsuda, Takeshi Kudo
  • Patent number: 10132178
    Abstract: To provide a steam turbine stationary blade adapted to remove a liquid film effectively. A steam turbine stationary blade with a hollow region therein, the steam turbine stationary blade includes a plurality of slots and arranged in lines in a direction of a chord length, the plurality of slots communicate with a working fluid flow passageway and with the hollow region, and extends in a direction of a blade length, and at least one connecting portion disposed so that for each of the most downstream slot of the plurality of slots and, a surface directed toward the working fluid flow passageway is positioned closer to the hollow region than to a surface of the steam turbine stationary blade, and so that the connecting portion connects both sidewall surfaces of each of the most downstream slots, in the direction of the chord length.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: November 20, 2018
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Koji Ishibashi, Susumu Nakano, Takeshi Kudo
  • Patent number: 9976208
    Abstract: The present invention provides a Cu—Fe—P alloy which has a high strength, high conductivity and superior bending workability. The copper alloy comprises 0.01 to 1.0% Fe, 0.01 to 0.4% P, 0.1 to 1.0% Mg, and the remainder Cu and unavoidable impurities. The size of oxides and precipitates including Mg in the copper alloy is controlled so that the ratio of the amount of Mg measured by a specified measurement method in the extracted residue by a specified extracted residue method to the Mg content in said copper alloy is 60% or less, thus endowing the alloy with a high strength and superior bending workability.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: May 22, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Yasuhiro Aruga, Katsura Kajihara, Takeshi Kudo
  • Patent number: 9745866
    Abstract: A steam turbine stationary blade is configured to be a stationary blade structure having a hollow structure. The steam turbine stationary blade is provided with a slit disposed on a stationary blade surface. The pressure of a stationary blade hollow is reduced to suction a liquid film through the slit for removing the liquid film formed on the stationary blade surface. An opening portion of the slit is covered with a sheet in a meshed pattern formed of a fine mesh thereby reducing an accompanied steam amount so as to effectively remove the liquid film.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: August 29, 2017
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Susumu Nakano, Koji Ishibashi, Kenjiro Narita, Takeshi Kudo
  • Publication number: 20170198608
    Abstract: An exhaust hood for a steam turbine including a turbine rotor that is rotatable around a center axis and moving blades disposed on an outer periphery side of the turbine rotor includes: a bearing cone disposed on an inner periphery side and on a downstream side of the moving blades of a final stage; an annular flow guide disposed on an outer periphery side and on the downstream side of the moving blades of the final stage; and an external casing surrounding the bearing cone and the flow guide. Meridional shapes of the flow guide at respective circumferential positions are shapes obtained by rotating a certain representative shape around an upstream end of the certain representative shape in a meridional plane and by equally maintaining or reducing a radial length of the representative shape.
    Type: Application
    Filed: January 11, 2017
    Publication date: July 13, 2017
    Inventors: Hideki ONO, Shunsuke MIZUMI, Takeshi KUDO, Tatsuhito HATTORI
  • Patent number: 9598964
    Abstract: A plurality of slots with different widths are provided in a plurality of line on a stationary blade surface. More specifically, the steam turbine stationary blade has a hollow nozzle with a penetrating space, which is connected with a diaphragm outer ring or inner ring, and a plurality of suction slots extending radially which are arranged on the blade surface. At a position where a water film deposited to the blade surface is thick, the width of a slot is smaller and at a position where the water film is thin, the width of a slot is larger.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: March 21, 2017
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Koji Ishibashi, Susumu Nakano, Shunsuke Mizumi, Takeshi Kudo
  • Publication number: 20160369654
    Abstract: An axial turbine includes an upstream turbine stage that includes: a cover disposed at a distal end of an upstream bucket and opposed to an inner wall of an upstream diaphragm outer ring across a gap; and a downstream diaphragm outer ring that is disposed downstream of the upstream turbine stage and that has an inner peripheral-side end wall shaped into a flare. The inner peripheral-side end wall of the downstream diaphragm outer ring has a flare angle formed to be greater than a slant angle of an inner peripheral-side wall of the cover. In the axial turbine, the inner peripheral-side end wall of the downstream diaphragm outer ring is formed to have a meridional shape that has at least one inflection point between the upstream turbine stage and a downstream turbine stage and such that a tangent at the inflection point with respect to a steam flow direction has a positive gradient.
    Type: Application
    Filed: June 15, 2016
    Publication date: December 22, 2016
    Inventors: Hisataka FUKUSHIMA, Takeshi KUDO, Shigeki SENOO, Hideki ONO
  • Patent number: 9511471
    Abstract: A burnishing device and method are provided that enable burnishing processing to be reliably performed on a surface included in an object to be processed and having a change in height and inclination angle. The device includes a burnishing tool having a pressing unit that rotationally presses a surface of an object to be processed, the surface having a change in height and inclination angle; a tool driving device configured to move the burnishing tool; a strain sensor configured to detect the strain amount of the burnishing tool; and a computer that calculates pressing force to be applied by the pressing unit in a normal direction of the surface of the object to be processed, calculates correction amount of displacement of the tool driving device in a pressing direction based on calculated pressing force and stored pressing force in advance, and outputs the correction amount to the tool driving device.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: December 6, 2016
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Atsuya Hirano, Keiko Shishime, Takeshi Kudo, Kazuto Mikazuki, Koki Sato, Hideo Yoda
  • Patent number: 9435769
    Abstract: The transmission sensor 1T and the reception sensor 1R are disposed so as to sandwich a testing target 301 therebetween. The reception sensor 1R receives a false signal arising from a GL generated upon ML scanning by a scanning angle equal to or greater than a minimum scanning angle ?min but equal to or smaller than a maximum scanning angle ?max.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: September 6, 2016
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yutaka Suzuki, Hiroaki Chiba, Takeshi Kudo