Patents by Inventor Shoki Yamashita
Shoki Yamashita 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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Patent number: 11536162Abstract: An exhaust chamber of a steam turbine according to an embodiment includes an outer casing which includes an end wall part in an axial direction and an extension part extending upward in the axial direction from the end wall part, a first flow guide formed into an annular shape, the first flow guide forming an upstream region of a diffuser surface in a hub-side flow guide and being fixed to an upstream end portion of the extension part on a radially inner side of the diffuser surface, and a second flow guide formed into an annular shape, the second flow guide forming a downstream region of the diffuser surface at a position downstream of the first flow guide and on a radially outer side of the extension part, and being fixed to the extension part.Type: GrantFiled: September 20, 2019Date of Patent: December 27, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shoki Yamashita, Takaaki Matsuo, Soichiro Tabata
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Publication number: 20210262365Abstract: An exhaust chamber of a steam turbine according to an embodiment includes an outer casing which includes an end wall part in an axial direction and an extension part extending upward in the axial direction from the end wall part, a first flow guide formed into an annular shape, the first flow guide forming an upstream region of a diffuser surface in a hub-side flow guide and being fixed to an upstream end portion of the extension part on a radially inner side of the diffuser surface, and a second flow guide formed into an annular shape, the second flow guide forming a downstream region of the diffuser surface at a position downstream of the first flow guide and on a radially outer side of the extension part, and being fixed to the extension part.Type: ApplicationFiled: September 20, 2019Publication date: August 26, 2021Applicant: Mitsubishi Power, Ltd.Inventors: Shoki Yamashita, Takaaki Matsuo, Soichiro Tabata
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Patent number: 9551224Abstract: The turbine includes: a shaft body supported rotatably; a plurality of turbine blade members; a casing covering the shaft body and the turbine blade row; an outer ring member that is provided on an inner periphery of the casing and includes an inner peripheral portion in which a cross-section having a uneven shape is continuous in a circumferential direction; a plurality of turbine vane members that each has a shroud fitted into the inner peripheral portion of the outer ring member and a turbine vane main body extending from the shroud to a radially inward side; and a plate member that connects at least some of the plurality of turbine vane members and covers one side of the shrouds in the axial direction, thereby sealing a shroud gap formed between the shrouds adjacent to each other in the circumferential direction.Type: GrantFiled: October 28, 2011Date of Patent: January 24, 2017Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Tomoyuki Onishi, Yuichiro Waki, Shoki Yamashita, Takaaki Matsuo, Asaharu Matsuo
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Patent number: 8757964Abstract: A scroll structure of a rotary machine and a rotary machine is provided in which it is possible to achieve an improvement in reliability and functionality of a rotary machine such as a turbine and to achieve a reduction in size. Provided are a scroll main body that entirely covers an area surrounding an annular channel extending in a circular shape about a rotational axis in a rotating portion of a rotary machine and a cylindrical channel extending from the annular channel at the rotational axis side and extending towards the rotating portion; and a fitting portion that supports the scroll main body with respect to a support portion and a casing accommodating the scroll main body so as to enable expansion and contraction in a radial direction centered on the rotational axis, while restraining the scroll main body in the direction along the axial axis.Type: GrantFiled: March 27, 2009Date of Patent: June 24, 2014Assignees: Pebble Bed Modular Reactor (Pty) Limited, Mitsubishi Heavy Industries, Ltd.Inventors: Shoki Yamashita, Toshihiro Inoue
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Patent number: 8613589Abstract: To provide a thermal insulation structure for a structural member and a scroll structure which can be easily used even in integrally constructed structural members and which can ensure reliability and thermal insulation properties. Provided are securing portions (52 and 53) extending outward from an outer wall of the structural member; a press plate (55) attached to the securing portions (52 and 53), with a gap between the press plate and the outer wall; and a thermal insulation member (56) disposed between the outer wall and the press plate (55).Type: GrantFiled: March 27, 2009Date of Patent: December 24, 2013Assignees: Pebble Bed Modular Reactor (Pty) Limited, Mitsubishi Heavy Industries, Ltd.Inventors: Shoki Yamashita, Toshihiro Inoue
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Publication number: 20130149125Abstract: The turbine includes: a shaft body supported rotatably; a plurality of turbine blade members; a casing covering the shaft body and the turbine blade row; an outer ring member that is provided on an inner periphery of the casing and includes an inner peripheral portion in which a cross-section having a uneven shape is continuous in a circumferential direction; a plurality of turbine vane members that each has a shroud fitted into the inner peripheral portion of the outer ring member and a turbine vane main body extending from the shroud to a radially inward side; and a plate member that connects at least some of the plurality of turbine vane members and covers one side of the shrouds in the axial direction, thereby sealing a shroud gap formed between the shrouds adjacent to each other in the circumferential direction.Type: ApplicationFiled: October 28, 2011Publication date: June 13, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tomoyuki Onishi, Yuichiro Waki, Shoki Yamashita, Takaaki Matsuo, Asaharu Matsuo
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Patent number: 8360677Abstract: A hydraulic detachable coupling, which can transmit rated torque in a manner stable to vibrations, and can fully withstand abnormal torque. For this purpose, in a hydraulic detachable coupling (4) mounted detachably on a rotor (1) of a steam or gas turbine or other machine, a coupling sleeve (4b), which is fitted on a shaft end portion of a casing penetrating shaft (2) in the rotor (1), includes a taper hole portion (4b-a) which is interference-fitted on a taper shaft portion (2a) of the shaft end portion by a hydraulic pressure, and a straight hole portion (4b-b) having teeth (13) engaging a plurality of teeth (12) formed in a straight shaft portion (2b) of the shaft end portion, the taper hole portion (4b-a) and the straight hole portion (4b-b) being located adjacent to each other.Type: GrantFiled: February 21, 2007Date of Patent: January 29, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shoki Yamashita, Tadao Yashiki, Taku Ichiryu
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Publication number: 20120001426Abstract: A hydraulic detachable coupling, which can transmit rated torque in a manner stable to vibrations, and can fully withstand abnormal torque. For this purpose, in a hydraulic detachable coupling (4) mounted detachably on a rotor (1) of a steam or gas turbine or other machine, a coupling sleeve (4b), which is fitted on a shaft end portion of a casing penetrating shaft (2) in the rotor (1), includes a taper hole portion (4b-a) which is interference-fitted on a taper shaft portion (2a) of the shaft end portion by a hydraulic pressure, and a straight hole portion (4b-b) having teeth (13) engaging a plurality of teeth (12) formed in a straight shaft portion (2b) of the shaft end portion, the taper hole portion (4b-a) and the straight hole portion (4b-b) being located adjacent to each other.Type: ApplicationFiled: September 13, 2011Publication date: January 5, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shoki Yamashita, Tadao Yashiki, Taku Ichiryu
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Publication number: 20110217175Abstract: It is possible to easily and rapidly slot a blade root of a final (last) turbine rotor blade into a blade groove on a turbine disc even when the plan-view shape of a shroud of the turbine rotor blade is complex. A turbine rotor blade that is provided with a blade root that is slotted into a blade groove formed on a circumferential portion of the turbine disc to hold the whole blade, a blade portion that is exposed to high-temperature gas, a platform that supports this blade portion, a shank that connects the blade root and the platform, and a shroud that extends along the circumferential direction from the end of the blade portion has a cut-out portion cut out to a predetermined depth, either at the leading-edge or the trailing-edge of the blade root, along the lengthwise direction thereof from the end of the blade root to an intermediate part of the shank.Type: ApplicationFiled: January 8, 2009Publication date: September 8, 2011Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Naoto Tochitani, Shohei Danno, Shoki Yamashita
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Publication number: 20100316491Abstract: To provide a thermal insulation structure for a structural member and a scroll structure which can be easily used even in integrally constructed structural members and which can ensure reliability and thermal insulation properties. Provided are securing portions (52 and 53) extending outward from an outer wall of the structural member; a press plate (55) attached to the securing portions (52 and 53), with a gap between the press plate and the outer wall; and a thermal insulation member (56) disposed between the outer wall and the press plate (55).Type: ApplicationFiled: March 27, 2009Publication date: December 16, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shoki Yamashita, Toshihiro Inoue
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Publication number: 20100296923Abstract: To provide a scroll structure of a rotary machine and a rotary machine in which it is possible to achieve an improvement in reliability and functionality of a rotary machine such as a turbine and to achieve a reduction in size of the rotary machine and the scroll structure. Provided are a casing (21) that entirely covers an area surrounding an annular channel extending in a circular shape about a rotational axis in a rotating portion of a rotary machine and a cylindrical channel extending from the annular channel at the rotational axis side and extending towards the rotating portion; and a fitting portion (23A) that supports the casing (21) with respect to a support portion accommodating the casing (21) so as to enable expansion and contraction in a radial direction centered on the rotational axis.Type: ApplicationFiled: March 27, 2009Publication date: November 25, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shoki Yamashita, Toshihiro Inoue
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Publication number: 20100260599Abstract: To reduce the size of a rotary machine and to provide a rotary machine in which it is possible to achieve an improvement in reliability and performance of the rotary machine.Type: ApplicationFiled: March 27, 2009Publication date: October 14, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shoki Yamashita, Toshihiro Inoue, Takaaki Matsuo
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Publication number: 20090324323Abstract: A hydraulic detachable coupling, which can transmit rated torque in a manner stable to vibrations, and can fully withstand abnormal torque, is provided. For this purpose, in a hydraulic detachable coupling (4) mounted detachably on a rotor (1) of a steam or gas turbine or other machine, a coupling sleeve (4b), which is fitted on a shaft end portion of a casing penetrating shaft (2) in the rotor (1), includes a taper hole portion (4b-a) which is interference-fitted on a taper shaft portion (2a) of the shaft end portion by a hydraulic pressure, and a straight hole portion (4b-b) having teeth (13) engaging a plurality of teeth (12) formed in a straight shaft portion (2b) of the shaft end portion, the taper hole portion (4b-a) and the straight hole portion (4b-b) being located adjacent to each other.Type: ApplicationFiled: February 21, 2007Publication date: December 31, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shoki Yamashita, Tadao Yashiki, Taku Ichiryu