Patents by Inventor Hitoshi Sakakida
Hitoshi Sakakida 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: 9057682Abstract: According to the embodiment, there is provided a blade vibration measuring apparatus, having, a contactless displacement sensor which outputs a displacement measurement signal as measuring a displacement of a turbine moving blade in a rotation axis direction, a blade top position identifying device which outputs a blade top position identification signal to identify a top position based on a distance between the contactless displacement sensor and the top position of the turbine moving blade as receiving the displacement measurement signal output from the contactless displacement sensor, and a blade vibration calculating device which calculates vibration amplitude and a vibration frequency of the turbine moving blade based on temporal variation of the distance between the contactless displacement sensor and the top position of the turbine moving blade as receiving the blade top position identification signal output from the blade top position identifying device.Type: GrantFiled: September 13, 2012Date of Patent: June 16, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kohichi Nakayama, Kenji Osaki, Hisashi Matsuda, Hitoshi Sakakida, Toshio Hirano, Toshiaki Hirate, Sueyoshi Mizuno, Ikuo Saito
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Publication number: 20130247671Abstract: According to the embodiment, there is provided a blade vibration measuring apparatus, having, a contactless displacement 5 sensor which outputs a displacement measurement signal as measuring a displacement of a turbine moving blade in a rotation axis direction, a blade top position identifying device which outputs a blade top position identification signal to identify a top position based on a distance between the contactless displacement sensor 10 and the top position of the turbine moving blade as receiving the displacement measurement signal output from the contactless displacement sensor, and a blade vibration calculating device which calculates vibration amplitude and a vibration frequency of the turbine moving blade based on temporal variation of the distance 15 between the contactless displacement sensor and the top position of the turbine moving blade as receiving the blade top position identification signal output from the blade top position identifying device.Type: ApplicationFiled: September 13, 2012Publication date: September 26, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kohichi Nakayama, Kenji Osaki, Hisashi Matsuda, Hitoshi Sakakida, Toshio Hirano, Toshiaki Hirate, Sueyoshi Mizuno, Ikuo Saito
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Publication number: 20130028731Abstract: In a tilting pad journal bearing device including a plurality of arc-shaped pads 31, 32, . . . , 36 which are incorporated in a bearing inner ring 4 swingably in a circumferential direction of a journal 2, a load applied to each of the pads 31, 32, and 36 disposed in a lower half portion of the bearing inner ring 4 has anisotropy.Type: ApplicationFiled: July 24, 2012Publication date: January 31, 2013Inventors: Yuki MIMURA, Hitoshi SAKAKIDA, Toshio HIRANO, Kazunori IKEDA, Kenichi KASE, Kenichi IMAI
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Patent number: 8105023Abstract: A steam turbine has: a casing; a rotor rotatably arranged in the casing; a nozzle diaphragm concentrically arranged with respect to the rotor, the nozzle diaphragm being engaged with the casing; moving blades arranged in circumferential direction on outer circumference of the rotor at positions adjacent to the nozzle diaphragm; seal strips circumferentially extending on tips of the moving blades, the seal strips protruding in radial outward direction; and an abradable structure rigidly connected to the nozzle diaphragm. The abradable structure faces the seal strips in radial direction at a facing surface, and has an abradable part made of an abradable material arranged at the facing surface.Type: GrantFiled: January 2, 2008Date of Patent: January 31, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Kazutaka Ikeda, Takashi Sasaki, Satoru Asai, Hitoshi Sakakida, Kenji Kamimura, Ryohei Ogino, Yasushi Ooishi
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Publication number: 20080175706Abstract: A steam turbine has: a casing; a rotor rotatably arranged in the casing; a nozzle diaphragm concentrically arranged with respect to the rotor, the nozzle diaphragm being engaged with the casing; moving blades arranged in circumferential direction on outer circumference of the rotor at positions adjacent to the nozzle diaphragm; seal strips circumferentially extending on tips of the moving blades, the seal strips protruding in radial outward direction; and an abradable structure rigidly connected to the nozzle diaphragm. The abradable structure faces the seal strips in radial direction at a facing surface, and has an abradable part made of an abradable material arranged at the facing surface.Type: ApplicationFiled: January 2, 2008Publication date: July 24, 2008Inventors: Kazutaka IKEDA, Takashi Sasaki, Satoru Asai, Hitoshi Sakakida, Kenji Kamimura, Ryohei Ogino, Yasushi Ooishi
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Publication number: 20070147990Abstract: A sealing device by which the leakage of fluid is further reduced by securely maintaining the adhesion between a base material and an abradable layer and further strengthening the prevention of fluid leakage is provided. The sealing device according to the present invention includes seal strips provided to either one of a rotating portion or a stationary portion forming a gap therebetween; and a coating layer provided to a base material of the rotating portion or the stationary portion so that the coating layer faces the seal strips. The coating layer is composed of an abradable layer and a bond coat layer.Type: ApplicationFiled: December 19, 2006Publication date: June 28, 2007Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kenji Kamimura, Takashi Sasaki, Hitoshi Sakakida, Yoichi Tsuda, Satoru Asai
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Patent number: 6460422Abstract: A torque measuring device including a light irradiation element for irradiating a light, and a control unit operatively connected to the irradiation element so as to branch the light into a plurality of lights as beams and control a beam diameter of the respective lights so as to irradiate the lights on a surface of a member to be measured. The torque measuring device further includes a plurality of reflectors disposed on the surface of the member to be measured so as to change reflection state of the respective lights, a plurality of detectors for detecting the changes of intensities of the respective reflected lights and generating signals thereof, and a signal processor for processing the generated signals and operating a rotation period on the basis of the generated signals thereby to calculate a torque of the member to be measured.Type: GrantFiled: October 31, 2000Date of Patent: October 8, 2002Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Co., Inc.Inventors: Hidehiko Kuroda, Shigeru Kanemoto, Michio Sato, Takuhisa Kondo, Makoto Ochiai, Hitoshi Sakakida, Tatsuo Yamashita, Kiyoto Oyagi, Shuuichi Umezawa, Kazuo Saito, Hajime Obikawa