Patents by Inventor Tsuguhisa Tashima
Tsuguhisa Tashima 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).
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Publication number: 20210262361Abstract: There is provided a turbine in which a sufficient measure against windage loss can be executed. In a turbine of an embodiment, a cooling medium higher in pressure and lower in temperature than a working medium is introduced to the inside from the outside of a turbine casing. Here, in at least a turbine stage of an exhaust stage, the cooling medium passes through a stator blade and thereafter passes through a flow path present between rotor blades and a rotor wheel to flow to an exhaust-stage wheel space.Type: ApplicationFiled: February 8, 2021Publication date: August 26, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Takahiro ONO, Shogo IWAI, Daisuke NOMURA, Norikazu TAKAGI, Tomomi OKUYAMA, Koki NISHIMURA
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Publication number: 20210215102Abstract: Shaft stability is enhanced and reliability is improved. In a gas turbine power generation system of an embodiment, a pressurizing unit, a rotation control unit, a diaphragm coupling, a turbine, and a generator are disposed to line up sequentially on the same shaft. A thrust bearing is provided between the turbine and the generator. The turbine is configured such that a working medium flows from the diaphragm coupling side toward the rotation control unit side.Type: ApplicationFiled: January 6, 2021Publication date: July 15, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro ONO, Tsuguhisa TASHIMA, Shogo IWAI, Hideyuki MAEDA, Tomomi OKUYAMA, Koki NISHIMURA
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Publication number: 20210215046Abstract: According to an embodiment, a turbine comprises: a casing; a rotor shaft; turbine stages; a thrust bearing which receives thrust load in the axial direction generated by a flow of a working fluid supplied to the turbine stages; a balance piston which is formed on the rotor shaft along a circumferential direction and projects in a radial direction from the rotor shaft, for adjusting a thrust contact pressure; and a thrust load adjusting mechanism which applies pressures of a pressure-increasing side and a pressure-decreasing side to at least one of a balance piston inner-side chamber and a balance piston outer-side chamber which sandwich the balance piston in the axial direction.Type: ApplicationFiled: December 7, 2020Publication date: July 15, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Takahiro ONO, Shogo IWAI, Tomomi OKUYAMA, Hideyuki MAEDA, Koki NISHIMURA
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Patent number: 11047260Abstract: There is provided a turbine casing capable of easily realizing improvement of reliability regarding a connection with an exhaust pipe. A turbine casing according to an embodiment includes an exhaust pipe connecting part formed of ferritic heat resistant steel, to which an exhaust pipe formed of austenitic heat resistant steel is connected. Here, the exhaust pipe connecting part and the exhaust pipe are fastened by using screws.Type: GrantFiled: December 13, 2019Date of Patent: June 29, 2021Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Shogo Iwai, Tsuguhisa Tashima, Toshio Morimoto
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Publication number: 20210180469Abstract: The steam turbine of an embodiment has: an outer casing; an inner casing housed in the outer casing; a turbine rotor penetrating the inner casing and the outer casing; and a support beam provided in the outer casing, extending in an axial direction of the turbine rotor, and supporting the inner casing, and is disposed on a foundation. The outer casing has outer casing support portions provided in both end portions of the outer casing in the axial direction of the turbine rotor and supported by the foundation. The support beam has beam end portions provided in both end portions in the axial direction of the turbine rotor. The outer casing support portion has a support surface supporting the beam end portion. Further, the outer casing includes a height adjustment mechanism capable of accessing the beam end portion from the outside of the outer casing.Type: ApplicationFiled: December 9, 2020Publication date: June 17, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Shogo IWAI, Tsuguhisa TASHIMA, Takahiro ONO, Daichi FUKABORI
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Publication number: 20210172343Abstract: In one embodiment, a turbine monitoring system includes one or more measurers configured to sense a physical quantity of steam to be introduced to a steam turbine or exhausted from the steam turbine or water obtained from the steam exhausted from the steam turbine, and output a sensing result of the physical quantity. The system further includes a computing module configured to compute an erosion quantity of a moving vane of the steam turbine with water drops, based on the sensing result output from the one or more measurers. The system further includes a displaying module configured to display information that is based on the erosion quantity computed by the computing module.Type: ApplicationFiled: December 7, 2020Publication date: June 10, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tomohiko TSUKUDA, Tsuguhisa TASHIMA
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Publication number: 20210172321Abstract: A turbine rotor of an embodiment includes a rotor body portion having turbine discs in plural stages in an axial direction protruding radially outside from an outer peripheral surface of the rotor body portion over a circumferential direction. The turbine rotor includes a plurality of axial passages, through which a cooling medium flows, formed at the rotor body portion radially outside than a center axis of the turbine rotor and radially inside than an outer peripheral surface of the rotor body portion in the axial direction; an introduction passage introducing the cooling medium into each of the axial passages; and discharge passages that penetrate from each of the axial passages to the outer peripheral surface of the rotor body portion to discharge the cooling medium.Type: ApplicationFiled: November 25, 2020Publication date: June 10, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Takahiro ONO, Shogo IWAI, Yoshifumi IWASAKI, Norikazu TAKAGI
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Patent number: 10989074Abstract: An exhaust hood in an embodiment includes: an outer casing; and an annular diffuser which is provided on a downstream side of a final turbine stage and formed by a cylindrical steam guide and a cylindrical bearing cone provided inside the steam guide. The steam guide includes a curved guide and a flat-plate guide which is provided on a downstream side of the curved guide. When a cross section of the outer casing vertical to the rotation axis of the turbine rotor is viewed from the downstream side of the steam guide, expansion outward in the radial direction of the flat-plate guide is set based on D/H where a distance between the rotation axis of the turbine rotor and an inner surface of the outer casing is H and a distance between the rotation axis of the turbine rotor and a downstream end of the flat-plate guide is D.Type: GrantFiled: January 2, 2018Date of Patent: April 27, 2021Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Hiroaki Mitsui, Tsuguhisa Tashima, Shogo Iwai, Takahiro Ono, Daichi Fukabori
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Patent number: 10746058Abstract: A steam turbine 1 of one embodiment has a side exhaust structure where a condenser 190 is installed at one side in directions perpendicular and horizontal to an axial direction of a turbine rotor 40 and supported on a foundation 70. The steam turbine 1 includes an outer casing 10 having an outer casing upper half 12 and an outer casing lower half 13; a groove part 100 formed in each of a pair of lower half end plates 17 extending perpendicular to the axial direction of the turbine rotor 40, the groove part 100 being opened upward and being recessed to an inside of the outer casing 10; and a block-shaped key member 120 fitted to both the groove parts 100 and 110, a groove part 110 being formed at a part of the foundation 70 facing the groove part 100, the groove part 110 being opened upward.Type: GrantFiled: March 4, 2019Date of Patent: August 18, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro Ono, Tsuguhisa Tashima, Shogo Iwai, Daichi Fukabori
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Patent number: 10738658Abstract: An axial flow turbine according to an embodiment includes: an outer casing; an inner casing provided inside the outer casing; a discharge pipe that is welded and joined to the outer casing and through which a working fluid discharged from the axial flow turbine flows; a sleeve that is provided inside the outer casing and the discharge pipe and guides the working fluid discharged from the axial flow turbine to the discharge pipe; a tubular member that is provided over an outer periphery of the sleeve inside the outer casing and the discharge pipe and covers an inner periphery side of a joint portion between the outer casing and the discharge pipe; an introduction port that introduces a cooling medium into a space demarcated by the outer casing, the discharge pipe, and the tubular member; and a discharge port that discharges the cooling medium introduced into the space.Type: GrantFiled: April 19, 2018Date of Patent: August 11, 2020Assignee: Toshiba Energy Systems & Solutions CorporationInventors: Tomohiro Tejima, Tsuguhisa Tashima, Norikazu Takagi, Shogo Iwai
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Publication number: 20200191015Abstract: There is provided a turbine casing capable of easily realizing improvement of reliability regarding a connection with an exhaust pipe. A turbine casing according to an embodiment includes an exhaust pipe connecting part formed of ferritic heat resistant steel, to which an exhaust pipe formed of austenitic heat resistant steel is connected. Here, the exhaust pipe connecting part and the exhaust pipe are fastened by using screws.Type: ApplicationFiled: December 13, 2019Publication date: June 18, 2020Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Shogo IWAI, Tsuguhisa TASHIMA, Toshio MORIMOTO
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Publication number: 20200191060Abstract: There is provided a manufacturing method of a turbine casing capable of easily realizing improvement of reliability. A manufacturing method of a turbine casing according to an embodiment is a manufacturing method of a turbine casing which includes an outer casing formed of ferritic heat resistant steel and an inner casing disposed inside the outer casing and formed of austenitic heat resistant steel, and in which an exhaust hood to which a working medium after performing work in turbine stages is exhausted, is covered by the inner casing. Here, the inner casing is manufactured by using members produced by at least either forging or rolling.Type: ApplicationFiled: December 13, 2019Publication date: June 18, 2020Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Shogo IWAI, Tsuguhisa TASHIMA, Toshio MORIMOTO
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Patent number: 10662817Abstract: A steam turbine according to an embodiment includes an outer casing, an inner casing, a turbine rotor, and a pair of inner casing regulating portions. The pair of inner casing regulating portions regulates movement of the inner casing in a direction orthogonal to an axial direction of the turbine rotor. The pair of inner casing regulating portions is disposed beneath the inner casing at positions different from each other in the axial direction and is supported by a regulating supporting portion extending upward from a bottom portion of the outer casing.Type: GrantFiled: November 21, 2017Date of Patent: May 26, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Norikazu Takagi, Takahiro Ono, Tsuguhisa Tashima, Shogo Iwai, Daichi Fukabori
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Patent number: 10487692Abstract: A steam turbine according to an embodiment includes an outer casing; an inner casing housed in the outer casing; a turbine rotor penetrating the inner casing and the outer casing; and a supporting beam provided inside the outer casing. The supporting beam extends in an axial direction of the turbine rotor and supports the inner casing. The outer casing includes outer casing supporting portions which are provided at both ends of the outer casing in the axial direction and are supported by the foundation. The supporting beam has beam end portions provided at both ends in the axial direction. Each of the outer casing supporting portions includes a supporting surface that supports the corresponding beam end portion.Type: GrantFiled: November 21, 2017Date of Patent: November 26, 2019Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Takahiro Ono, Tsuguhisa Tashima, Shogo Iwai, Daichi Fukabori
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Patent number: 10450958Abstract: A turbine and so on capable of enabling high reliability are provided. In the turbine of an embodiment, a turbine rotor is accommodated in a turbine casing, and is rotated by a working medium which is introduced after flowing in an inlet pipe of a combustor. A sleeve is provided at the turbine casing, and accommodates the inlet pipe therein. Here, the sleeve is thicker than the inlet pipe, and a cooling fluid whose temperature is lower than the working fluid flows between the inlet pipe and the sleeve.Type: GrantFiled: January 13, 2015Date of Patent: October 22, 2019Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa Tashima, Shogo Iwai, Masao Ito, Shunsuke Takae
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Publication number: 20190277162Abstract: A steam turbine 1 of one embodiment has a side exhaust structure where a condenser 190 is installed at one side in directions perpendicular and horizontal to an axial direction of a turbine rotor 40 and supported on a foundation 70. The steam turbine 1 includes an outer casing 10 having an outer casing upper half 12 and an outer casing lower half 13; a groove part 100 formed in each of a pair of lower half end plates 17 extending perpendicular to the axial direction of the turbine rotor 40, the groove part 100 being opened upward and being recessed to an inside of the outer casing 10; and a block-shaped key member 120 fitted to both the groove parts 100 and 110, a groove part 110 being formed at a part of the foundation 70 facing the groove part 100, the groove part 110 being opened upward.Type: ApplicationFiled: March 4, 2019Publication date: September 12, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro ONO, Tsuguhisa TASHIMA, Shogo IWAI, Daichi FUKABORI
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Publication number: 20180238194Abstract: An axial flow turbine according to an embodiment includes: an outer casing; an inner casing provided inside the outer casing; a discharge pipe that is welded and joined to the outer casing and through which a working fluid discharged from the axial flow turbine flows; a sleeve that is provided inside the outer casing and the discharge pipe and guides the working fluid discharged from the axial flow turbine to the discharge pipe; a tubular member that is provided over an outer periphery of the sleeve inside the outer casing and the discharge pipe and covers an inner periphery side of a joint portion between the outer casing and the discharge pipe; an introduction port that introduces a cooling medium into a space demarcated by the outer casing, the discharge pipe, and the tubular member; and a discharge port that discharges the cooling medium introduced into the space.Type: ApplicationFiled: April 19, 2018Publication date: August 23, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Tomohiro TEJIMA, Tsuguhisa TASHIMA, Norikazu TAKAGI, Shogo IWAI
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Publication number: 20180202320Abstract: An exhaust hood in an embodiment includes: an outer casing; and an annular diffuser which is provided on a downstream side of a final turbine stage and formed by a cylindrical steam guide and a cylindrical bearing cone provided inside the steam guide. The steam guide includes a curved guide and a flat-plate guide which is provided on a downstream side of the curved guide. When a cross section of the outer casing vertical to the rotation axis of the turbine rotor is viewed from the downstream side of the steam guide, expansion outward in the radial direction of the flat-plate guide is set based on D/H where a distance between the rotation axis of the turbine rotor and an inner surface of the outer casing is H and a distance between the rotation axis of the turbine rotor and a downstream end of the flat-plate guide is D.Type: ApplicationFiled: January 2, 2018Publication date: July 19, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Hiroaki Mitsui, Tsuguhisa Tashima, Shogo Iwai, Takahiro Ono, Daichi Fukabori
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Publication number: 20180142573Abstract: A steam turbine according to an embodiment includes an outer casing, an inner casing, a turbine rotor, and a pair of inner casing regulating portions. The pair of inner casing regulating portions regulates movement of the inner casing in a direction orthogonal to an axial direction of the turbine rotor. The pair of inner casing regulating portions is disposed beneath the inner casing at positions different from each other in the axial direction and is supported by a regulating supporting portion extending upward from a bottom portion of the outer casing.Type: ApplicationFiled: November 21, 2017Publication date: May 24, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Norikazu TAKAGI, Takahiro ONO, Tsuguhisa TASHIMA, Shogo IWAI, Daichi FUKABORI
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Publication number: 20180142574Abstract: A steam turbine according to an embodiment includes an outer casing; an inner casing housed in the outer casing; a turbine rotor penetrating the inner casing and the outer casing; and a supporting beam provided inside the outer casing. The supporting beam extends in an axial direction of the turbine rotor and supports the inner casing. The outer casing includes outer casing supporting portions which are provided at both ends of the outer casing in the axial direction and are supported by the foundation. The supporting beam has beam end portions provided at both ends in the axial direction. Each of the outer casing supporting portions includes a supporting surface that supports the corresponding beam end portion.Type: ApplicationFiled: November 21, 2017Publication date: May 24, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Takahiro Ono, Tsuguhisa Tashima, Shogo Iwai, Daichi Fukabori