Patents by Inventor Hiroaki Irikawa
Hiroaki Irikawa 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: 11635002Abstract: A steam turbine includes a rotor, a casing, a partition plate, and a center guide pin. The center guide pin has a positioning portion. In a state of being attached to a pin attachment portion formed in one of the casing and the partition plate, the positioning portion is disposed in a groove portion formed in the other of the casing and the partition plate. The positioning portion includes a plurality of abutment portions capable of abutting on an inner side surface of the groove portion, around a pin axis. The plurality of abutment portions is formed to have different horizontal distances from the pin axis.Type: GrantFiled: February 24, 2017Date of Patent: April 25, 2023Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki
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Publication number: 20210332722Abstract: A steam turbine includes a rotor, a casing, a partition plate, and a center guide pin. The center guide pin has a positioning portion. In a state of being attached to a pin attachment portion formed in one of the casing and the partition plate, the positioning portion is disposed in a groove portion formed in the other of the casing and the partition plate. The positioning portion includes a plurality of abutment portions capable of abutting on an inner side surface of the groove portion, around a pin axis. The plurality of abutment portions is formed to have different horizontal distances from the pin axis.Type: ApplicationFiled: February 24, 2017Publication date: October 28, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki
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Patent number: 11047261Abstract: A steam turbine assembling method includes an upper half assembling step of, after disposing an upper half partition plate having an upper half partition plate division surface on the inner peripheral side of an upper half casing having an upper half casing division surface, attaching an upper half position defining portion to the upper half casing and the upper half partition plate so as to form an upper half assembly, and a lower half assembling step of disposing a lower half partition plate having a lower half partition plate division surface capable of abutting against the upper half partition plate division surface on an inner peripheral side of a lower half casing having a lower half casing division surface capable of abutting against the upper half casing division surface so as to form a lower half assembly.Type: GrantFiled: September 5, 2016Date of Patent: June 29, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki
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Patent number: 11022000Abstract: A steam turbine assembling method includes: disposing an upper half partition plate having an upper half partition plate division surface on an inner peripheral side of an upper half casing having an upper half casing division surface to form an upper half assembly; and, after disposing a lower half partition plate having a lower half partition plate division surface capable of abutting against the upper half partition plate division surface on an inner peripheral side of a lower half casing having a lower half casing division surface capable of abutting against the upper half casing division surface, fixing a lower half position defining portion to the lower half partition plate in a state where a lower half abutment surface abuts against the lower half casing division surface and the lower half partition plate division surface to form a lower half assembly.Type: GrantFiled: September 5, 2016Date of Patent: June 1, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki
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Patent number: 10612419Abstract: A steam turbine includes: a stator vane disposed in a cylinder inside a casing through which steam flows from an upstream side toward a downstream side; and a stationary support that supports the stator vane relative to the casing. The stationary support includes: a first supporting body fixed to the casing, a second supporting body that connects the stator vane to the first supporting body; and a replacement body detachably disposed between the first supporting body and the second supporting body on the upstream side.Type: GrantFiled: February 23, 2016Date of Patent: April 7, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki
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Publication number: 20190211710Abstract: A steam turbine assembling method includes: disposing an upper half partition plate having an upper half partition plate division surface on an inner peripheral side of an upper half casing having an upper half casing division surface to form an upper half assembly; and, after disposing a lower half partition plate having a lower half partition plate division surface capable of abutting against the upper half partition plate division surface on an inner peripheral side of a lower half casing having a lower half casing division surface capable of abutting against the upper half casing division surface, fixing a lower half position defining portion to the lower half partition plate in a state where a lower half abutment surface abuts against the lower half casing division surface and the lower half partition plate division surface to form a lower half assembly.Type: ApplicationFiled: September 5, 2016Publication date: July 11, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki
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Publication number: 20190186298Abstract: A steam turbine assembling method includes an upper half assembling step of, after disposing an upper half partition plate having an upper half partition plate division surface on the inner peripheral side of an upper half casing having an upper half casing division surface, attaching an upper half position defining portion to the upper half casing and the upper half partition plate so as to form an upper half assembly, and a lower half assembling step of disposing a lower half partition plate having a lower half partition plate division surface capable of abutting against the upper half partition plate division surface on an inner peripheral side of a lower half casing having a lower half casing division surface capable of abutting against the upper half casing division surface so as to form a lower half assembly.Type: ApplicationFiled: September 5, 2016Publication date: June 20, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki
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Publication number: 20190003338Abstract: A steam turbine includes: a stator vane disposed in a cylinder inside a casing through which steam flows from an upstream side toward a downstream side; and a stationary support that supports the stator vane relative to the casing. The stationary support includes: a first supporting body fixed to the casing, a second supporting body that connects the stator vane to the first supporting body; and a replacement body detachably disposed between the first supporting body and the second supporting body on the upstream side.Type: ApplicationFiled: February 23, 2016Publication date: January 3, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Katsumi Terada, Hiroaki Irikawa, Yuichi Sasaki