Patents by Inventor Yasuoki Tomita
Yasuoki Tomita 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: 11566983Abstract: A state quantity acquisition unit acquires a state quantity of a target apparatus including a temperature of the target apparatus. A load specification unit specifies a load history of the target apparatus, based on the state quantity. A remaining life calculation unit calculates a parameter related to a remaining life of the target apparatus for each of a plurality of degradation types, based on the load history specified by the load specification unit.Type: GrantFiled: November 28, 2017Date of Patent: January 31, 2023Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kuniaki Aoyama, Hideaki Kaneko, Masumi Nomura, Yasuoki Tomita, Katsuhiko Abe
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Patent number: 11384643Abstract: A turbine blade, a gas turbine, an intermediate product of the turbine blade, and a method of manufacturing the turbine blade are disclosed. The turbine blade has a blade body having hollow shape, cavities defined inside the blade body, and a cooling passage that opens from the cavities to a rear end portion of the blade body. The cooling passage includes: a first passage on a third cavity side and having a width that becomes narrower from the third cavity side toward the rear end portion of the blade body; and a second passage on a rear end portion side of the blade body and having a width that is constant from the third cavity side toward the rear end portion of the blade body.Type: GrantFiled: November 4, 2016Date of Patent: July 12, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yoshimasa Takaoka, Shunsuke Torii, Hidemichi Koyabu, Saki Matsuo, Yasuoki Tomita, Satoshi Hada, Yoshifumi Okajima
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Patent number: 11209811Abstract: A diagnostic device includes a storage unit that stores first information including a first abnormal event which occurred in the past in a plant, a first attribution event that is a cause of the first abnormal event, and a first occurrence probability of the first attribution event, in which a causal relationship between the first abnormal and attribution events is indicated by a tree structure, and second information including a second abnormal event which is supposed to occur in the plant but has not yet occurred, a second attribution event that is a cause of the second abnormal event, and a second occurrence probability of the second attribution event, in which a causal relationship between the second abnormal and attribution events is indicated by a tree structure; and an estimation unit that estimates the cause of the sign of the abnormality, based on the first and second information.Type: GrantFiled: September 1, 2017Date of Patent: December 28, 2021Assignee: MITSUBISHI POWER, LTD.Inventors: Masato Shida, Yukihiko Inoue, Kuniaki Aoyama, Ichiro Nagano, Shun Niizuma, Tomohiro Baba, Akihisa Endo, Takahiro Yamauchi, Tsuyoshi Kinoshita, Shinsaku Endo, Yasuoki Tomita, Katsuhiko Abe
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Patent number: 10990070Abstract: A state quantity acquiring unit is configured to acquire a state quantity of a turbine. A time calculation unit is configured to calculate an operable time at an over firing operation of the turbine based on a design life of the turbine and a state quantity. A distance calculation unit configured to calculate a Mahalanobis distance based on the state quantity. A determination unit configured to determine whether or not the over firing operation of the turbine is possible by the Mahalanobis distance and the operable time.Type: GrantFiled: December 8, 2016Date of Patent: April 27, 2021Assignee: MITSUBISHI POWER, LTD.Inventors: Yasuoki Tomita, Katsuhiko Abe, Shintaro Kumano, Motoshi Takasu, Etsushi Kanno, Takahiro Kawaguchi, Takayoshi Isoda, Yuki Enomoto, Nobuhiro Osaki, Kazuyuki Misawa, Akihisa Endo, Masao Ogino
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Publication number: 20210108999Abstract: A state quantity acquisition unit acquires a state quantity of a target apparatus including a temperature of the target apparatus. A load specification unit specifies a load history of the target apparatus, based on the state quantity. A remaining life calculation unit calculates a parameter related to a remaining life of the target apparatus for each of a plurality of degradation types, based on the load history specified by the load specification unit.Type: ApplicationFiled: November 28, 2017Publication date: April 15, 2021Inventors: Kuniaki AOYAMA, Hideaki KANEKO, Masumi NOMURA, Yasuoki TOMITA, Katsuhiko ABE
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Publication number: 20190384275Abstract: A diagnostic device includes a storage unit that stores first information including a first abnormal event which occurred in the past in a plant, a first attribution event that is a cause of the first abnormal event, and a first occurrence probability of the first attribution event, in which a causal relationship between the first abnormal and attribution events is indicated by a tree structure, and second information including a second abnormal event which is supposed to occur in the plant but does not occur yet, a second attribution event that is a cause of the second abnormal event, and a second occurrence probability of the second attribution event, in which a causal relationship between the second abnormal and attribution events is indicated by a tree structure; and an estimation unit that estimates the cause of the sign of the abnormality, based on the first and second information.Type: ApplicationFiled: September 1, 2017Publication date: December 19, 2019Inventors: Masato SHIDA, Yukihiko INOUE, Kuniaki AOYAMA, Ichiro NAGANO, Shun NIIZUMA, Tomohiro BABA, Akihisa ENDO, Takahiro YAMAUCHI, Tsuyoshi KINOSHITA, Shinsaku ENDO, Yasuoki TOMITA, Katsuhiko ABE
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Publication number: 20190018384Abstract: A state quantity acquiring unit is configured to acquire a state quantity of a turbine including a temperature of the turbine. A variable calculation unit is configured to calculate a history variable with respect to a history of the state quantity. A time calculation unit is configured to calculate the operable time at an over firing operation of the turbine based on a history variable corresponding to a design life of the turbine and a calculated history variable.Type: ApplicationFiled: December 8, 2016Publication date: January 17, 2019Inventors: Yasuoki TOMITA, Katsuhiko ABE, Shintaro KUMANO, Motoshi TAKASU, Etsushi KANNO, Takahiro KAWAGUCHI, Masao OGINO
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Publication number: 20190018380Abstract: A state quantity acquiring unit is configured to acquire a state quantity of a turbine. A time calculation unit is configured to calculate an operable time at an over firing operation of the turbine based on a design life of the turbine and a state quantity. A distance calculation unit configured to calculate a Mahalanobis distance based on the state quantity. A determination unit configured to determine whether or not the over firing operation of the turbine is possible by the Mahalanobis distance and the operable time.Type: ApplicationFiled: December 8, 2016Publication date: January 17, 2019Inventors: Yasuoki TOMITA, Katsuhiko ABE, Shintaro KUMANO, Motoshi TAKASU, Etsushi KANNO, Takahiro KAWAGUCHI, Takayoshi ISODA, Yuki ENOMOTO, Nobuhiro OSAKI, Kazuyuki MISAWA, Akihisa ENDO, Masao OGINO
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Publication number: 20180306037Abstract: Provided are a turbine blade, a gas turbine, an intermediate product of the turbine blade, and a method of manufacturing the turbine blade. This turbine blade has a blade body having hollow shape, cavities provided inside the blade body, and a cooling passage that opens from the cavities to the rear end portion of the blade body. The cooling passage includes: a first passage provided on the third cavity side and having a width that becomes narrower from the third cavity side toward the rear end portion of the blade body; and a second passage provided on the rear end portion side of the blade body and having a width that is constant from the third cavity side toward the rear end portion of the blade body.Type: ApplicationFiled: November 4, 2016Publication date: October 25, 2018Inventors: Yoshimasa TAKAOKA, Shunsuke TORII, Hidemichi KOYABU, Saki MATSUO, Yasuoki TOMITA, Satoshi HADA, Yoshifumi OKAJIMA
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Patent number: 9567909Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine; a cooling part provided in the intake duct and configured to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a protruding step part 13 formed in a convex shape protruding from bottom surfaces 12a1, 12a2 of the intake duct disposed on a downstream side of the cooling part; and at least one drain hole 110 formed in the bottom surfaces 12a1, 12a2 of the intake duct disposed on the downstream side of the cooling part so as to discharge drain water, generated on a surface of the cooling part and dropping from the surface, to an outside of the intake duct.Type: GrantFiled: March 20, 2014Date of Patent: February 14, 2017Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Keita Fujii, Yasuoki Tomita, Jiro Asakuno, Masaru Takamatsu, Tadakuni Nishio, Tatsunao Nagashima, Katsuhiro Hotta, Masashi Nishimura
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Publication number: 20160326961Abstract: A gas turbine cooling system includes an organic Rankine cycle in which a cycle medium repeatedly circulates through condensation and evaporation, an air-extraction line configured to extract compressed air from a compressor of a gas turbine, a cooling apparatus for cooling the compressed air while heating and evaporating the cycle medium condensed in the organic Rankine cycle using heat of the compressed air passing through the air-extraction line, and a cooling air line configured to guide the compressed air cooled by the cooling apparatus to a high temperature section of the gas turbine.Type: ApplicationFiled: March 25, 2014Publication date: November 10, 2016Inventors: Yasuoki TOMITA, Eiji AKITA, Naoki SAKAGAMI, Takaaki NAGAKAWA, Jiro ASAKUNO, Masaru TAKAMATSU, Shin AKAZAWA, Yasuhiro TAKASHIMA
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Patent number: 9458765Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air from an intake-air inlet 22 to a compressor 14 of the gas turbine, the intake duct having a vertical duct 12c and a manifold part 12d disposed on a downstream side of the vertical duct; a cooling part 26 provided in the intake duct to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a filter part 42 provided on an inlet side of the manifold part to remove impurities contained in the intake air introduced through the vertical duct; and a drain catcher 110 constituted by a gutter member provided immediately above the filter part along inner wall surfaces 12c1, 12c2 of the vertical duct, the drain catcher being configured to collect drain water flowing along the inner wall surfaces of the vertical duct.Type: GrantFiled: March 20, 2014Date of Patent: October 4, 2016Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Keita Fujii, Yasuoki Tomita, Jiro Asakuno, Masaru Takamatsu, Tadakuni Nishio, Tatsunao Nagashima, Katsuhiro Hotta, Masashi Nishimura
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Publication number: 20140290911Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine; a cooling part provided in the intake duct and configured to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a protruding step part 13 formed in a convex shape protruding from bottom surfaces 12a1, 12a2 of the intake duct disposed on a downstream side of the cooling part; and at least one drain hole 110 formed in the bottom surfaces 12a1, 12a2 of the intake duct disposed on the downstream side of the cooling part so as to discharge drain water, generated on a surface of the cooling part and dropping from the surface, to an outside of the intake duct.Type: ApplicationFiled: March 20, 2014Publication date: October 2, 2014Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Keita Fujii, Yasuoki Tomita, Jiro Asakuno, Masaru Takamatsu, Tadakuni Nishio, Tatsunao Nagashima, Katsuhiro Hotta, Masashi Nishimura
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Publication number: 20140290253Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air from an intake-air inlet 22 to a compressor 14 of the gas turbine, the intake duct having a vertical duct 12c and a manifold part 12d disposed on a downstream side of the vertical duct; a cooling part 26 provided in the intake duct to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a filter part 42 provided on an inlet side of the manifold part to remove impurities contained in the intake air introduced through the vertical duct; and a drain catcher 110 constituted by a gutter member provided immediately above the filter part along inner wall surfaces 12c1, 12c2 of the vertical duct, the drain catcher being configured to collect drain water flowing along the inner wall surfaces of the vertical duct.Type: ApplicationFiled: March 20, 2014Publication date: October 2, 2014Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Keita Fujii, Yasuoki Tomita, Jiro Asakuno, Masaru Takamatsu, Tadakuni Nishio, Tatsunao Nagashima, Katsuhiro Hotta, Masashi Nishimura
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Patent number: 7552647Abstract: In order to provide a turbine blade fatigue life evaluating method for quantitively evaluating the fatigue life of a turbine blade, the turbine blade is determined to be within its fatigue life if the creep elongation strain in the longitudinal direction of the turbine blade is less than 0.5% of an initial length, and is determined to exceed its fatigue life if the creep elongation strain is 0.5% or more than the initial length. A turbine blade creep elongation strain measuring apparatus 20 comprises a first fixed end 21, a second fixed end 22, and a dial gauge 24. A dimension in the longitudinal direction is stamped on the surface of a turbine blade.Type: GrantFiled: October 11, 2005Date of Patent: June 30, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Friedrich Soechting, Charles Ellis, Yasuoki Tomita, Yugo Tokunaga
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Patent number: 7481614Abstract: In a gas turbine having a plurality of moving blades provided on a rotary shaft in a circumferentially adjoining condition, a seal pin is provided in a spacing between the shanks of the adjacent moving blades for preventing leakage of cooling air from a blade root portion side to an airfoil side; an arcuately depressed portion is formed on the shank of each of the moving blades; and vibration of each of the moving blades is suppressed in such a manner that the seal pin serves as a spring system while the airfoil portion, the platform, the shank, and the blade root portion serve as a mass system.Type: GrantFiled: February 17, 2005Date of Patent: January 27, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yasuoki Tomita, Masaki Ono, Eiji Akita, Masao Terazaki, Masayuki Takahama, Kouji Watanabe, Hideki Murata
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Patent number: 7252477Abstract: A rotating blade body is provided that can restrain vibrations of rotating blades effectively. The rotating blade body comprises a rotor disc, a plurality of rotating blades being assembled so as to extend from the outer circumference of the rotor disc in a radial pattern, and sealing pins extending along the direction of the rotating shaft in the gaps between the platforms of the rotating blades being adjacent in a circumferential direction. The sealing pins have a through-hole made therein, penetrating axially from one end surface to the other end surface.Type: GrantFiled: January 27, 2006Date of Patent: August 7, 2007Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yasuoki Tomita, Kouji Watanabe, Masamitsu Okuzono, Masaki Ono
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Patent number: 7168914Abstract: The gas turbine stationary blade comprises a stationary blade section provided therein with a passage for cooling air, an inner shroud for supporting the stationary blade section on the side of a discharge port of the cooling air, and a plurality of segments each of which includes at least one stationary blade section and at least one inner shroud. A flow passage is pulled out from the discharge port of the cooling air, and the flow passage is introduced to a front edge corner section of the inner shroud and is extended rearward along a side edge of the inner shroud.Type: GrantFiled: October 11, 2005Date of Patent: January 30, 2007Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shigehiro Shiozaki, Masamitsu Kuwabara, Yasuoki Tomita
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Publication number: 20060201257Abstract: In order to provide a turbine blade fatigue life evaluating method for quantitively evaluating the fatigue life of a turbine blade, the turbine blade is determined to be within its fatigue life if the creep elongation strain in the longitudinal direction of the turbine blade is less than 0.5% of an initial length, and is determined to exceed its fatigue life if the creep elongation strain is 0.5% or more than the initial length. A turbine blade creep elongation strain measuring apparatus 20 comprises a first fixed end 21, a second fixed end 22, and a dial gauge 24. A dimension in the longitudinal direction is stamped on the surface of a turbine blade.Type: ApplicationFiled: October 11, 2005Publication date: September 14, 2006Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Friedrich Soechting, Charles Ellis, Yasuoki Tomita, Yugo Tokunaga
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Publication number: 20060177312Abstract: A rotating blade body is provided that can restrain vibrations of rotating blades effectively. The rotating blade body comprises rotor disc, a plurality of rotating blades being assembled so as to extend from the outer circumference of the rotor disc in a radial pattern, and sealing pins extending along the direction of the rotating shaft in the gaps between the platforms of the rotating blades being adjacent in circumferential direction. The sealing pins have a through-hole made therein, penetrating axially from one end surface to the other end surface.Type: ApplicationFiled: January 27, 2006Publication date: August 10, 2006Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yasuoki Tomita, Kouji Watanabe, Masamitsu Okuzono, Masaki Ono