Patents by Inventor Takaaki Kaikogi
Takaaki Kaikogi 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: 11143242Abstract: A journal bearing includes: a carrier ring; a plurality of bearing pads disposed on a radially inner side of a lower half region of the carrier ring, and configured to support a rotor shaft from below; and a guide metal disposed in an upper half region of the carrier ring, in center with respect to an axial direction of the rotor shaft, so as to cover an upper region of an outer peripheral surface of the rotor shaft.Type: GrantFiled: February 28, 2017Date of Patent: October 12, 2021Assignee: MITSUBISHI POWER, LTD.Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
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Patent number: 11035404Abstract: A bearing device includes a carrier ring, a first bearing portion disposed along an outer periphery of a rotor shaft on a radially inner side of the carrier ring; a second bearing portion disposed along the outer periphery and downstream of the first bearing portion, with respect to a rotational direction of the rotor shaft, on the radially inner side of the carrier ring; a pair of side plates disposed along the outer periphery of the rotor shaft, on both sides of the carrier ring with respect to an axial direction; a first oil guide portion disposed downstream of the first bearing portion and upstream of the second bearing portion, and configured to change a flow direction of oil after passing through a gap between an inner peripheral surface of the first bearing portion and an outer peripheral surface of the rotor shaft to guide the oil.Type: GrantFiled: August 10, 2016Date of Patent: June 15, 2021Assignee: MITSUBISHI POWER, LTD.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Publication number: 20200408257Abstract: A bearing device includes a carrier ring, a first bearing portion disposed along an outer periphery of a rotor shaft on a radially inner side of the carrier ring; a second bearing portion disposed along the outer periphery and downstream of the first bearing portion, with respect to a rotational direction of the rotor shaft, on the radially inner side of the carrier ring; a pair of side plates disposed along the outer periphery of the rotor shaft, on both sides of the carrier ring with respect to an axial direction; a first oil guide portion disposed downstream of the first bearing portion and upstream of the second bearing portion, and configured to change a flow direction of oil after passing through a gap between an inner peripheral surface of the first bearing portion and an outer peripheral surface of the rotor shaft to guide the oil.Type: ApplicationFiled: August 10, 2016Publication date: December 31, 2020Applicant: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Patent number: 10738822Abstract: A journal bearing includes: a carrier ring; a plurality of bearing pads disposed on a radially inner side of a lower half region of the carrier ring; a pair of side plates disposed on both sides of the plurality of bearing pads with respect to an axial direction of the rotor shaft; and at least one oil-supply unit for supplying lubricant oil to the plurality of bearing pads. From among the at least one oil-supply unit, a first oil-supply unit disposed on a downstream side of a most downstream pad positioned most downstream of the plurality of bearing pads is configured to supply the lubricant oil toward a region below a corner portion of the most downstream pad, of a trailing edge surface of the most downstream pad, the corner portion being formed by an intersection between a pad surface of the most downstream pad and the trailing edge surface.Type: GrantFiled: February 28, 2017Date of Patent: August 11, 2020Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
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Patent number: 10724573Abstract: A journal bearing includes: a carrier ring having a cylindrical shape; at least two bearing pads disposed on a radially inner side of the carrier ring and configured to support a rotor shaft; at least one oil-supply unit disposed on the radially inner side of the carrier ring, for supplying lubricant oil to a gap between the bearing pad and the rotor shaft; a pair of side plates disposed on both end portions of the carrier ring with respect to an axial direction, along an outer periphery of the rotor shaft; and at least one opening configured to bring a bearing interior space surrounded by the at least two bearing pads and the pair of side plates into communication with atmosphere, and discharge the lubricant oil to outside via the bearing interior space.Type: GrantFiled: August 10, 2016Date of Patent: July 28, 2020Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Patent number: 10514058Abstract: A bearing device includes: a carrier ring; a first bearing portion disposed along an outer periphery of a rotor shaft on a radially inner side of the carrier ring; a second bearing portion disposed along the outer periphery of the rotor shaft and downstream of the first bearing portion, with respect to a rotational direction of the rotor shaft, on the radially inner side of the carrier ring; and a pair of side plates disposed along the outer periphery of the rotor shaft, on both sides of the carrier ring with respect to an axial direction. In a carrier-ring side region of an inner peripheral surface of each of the side plates, a groove extending in a circumferential direction along a side surface of the first bearing portion is formed at least in a part of an extending range of the first bearing portion.Type: GrantFiled: August 10, 2016Date of Patent: December 24, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Patent number: 10514062Abstract: A journal bearing includes: a carrier ring having an annular shape; a first bearing pad disposed on a radially inner side of a lower half region of the carrier ring and configured to support a rotor shaft from below; a first oil-supply unit disposed immediately before and upstream of the first bearing pad; a pair of side plates disposed on both end portions of the carrier ring with respect to an axial direction, along an outer periphery of the rotor shaft, Each of the side plates includes: a first region; and a second region which is positioned above the first region, and in which a gap between an inner peripheral surface of the side plate and an outer peripheral surface of the rotor shaft is narrower than that in the first region.Type: GrantFiled: August 10, 2016Date of Patent: December 24, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Patent number: 10508565Abstract: A journal bearing includes: a carrier ring; a plurality of bearing pads disposed on a radially inner side of a lower half region of the carrier ring and configured to support a rotor shaft from below; a pair of side plates disposed on both sides of the plurality of bearing pads, with respect to an axial direction of the rotor shaft; and a dam disposed on a radially inner side of the carrier ring, in a downstream section of an upper half region of the carrier ring, and configured to suppress a downstream flow of carried-over oil. A gap is provided between inner peripheral surfaces of the respective side plates and an outer peripheral surface of the rotor shaft, for bringing into communication an outside and a bearing interior space surrounded by the pair of side plates.Type: GrantFiled: February 28, 2017Date of Patent: December 17, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
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Patent number: 10451105Abstract: A journal bearing includes a carrier ring, a plurality of bearing pads disposed on a radially inner side of a lower-half region of the carrier ring and configured to support a rotor shaft from below, and a pair of side plates disposed on both sides of the plurality of bearing pads with respect to an axial direction of the rotor shaft. Each of the side plates includes a first region including a circumferential range upstream of a first bearing pad positioned furthest upstream among the plurality of bearing pads, and a second region positioned upstream of the first region and has a larger distance between an inner peripheral surface of the side plate and an outer peripheral surface of the rotor shaft than that of the first region.Type: GrantFiled: February 28, 2017Date of Patent: October 22, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
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Publication number: 20190128321Abstract: A journal bearing includes: a carrier ring having a cylindrical shape: at least two bearing pads disposed on a radially inner side of the carrier ring and configured to support a rotor shaft; at least one oil-supply unit disposed on the radially inner side of the carrier ring, for supplying lubricant oil to a gap between the bearing pad and the rotor shaft; a pair of side plates disposed on both end portions of the carrier ring with respect to an axial direction, along an outer periphery of the rotor shaft; and at least one opening configured to bring a bearing interior space surrounded by the at least two bearing pads and the pair of side plates into communication with atmosphere, and discharge the lubricant oil to outside via the bearing interior space.Type: ApplicationFiled: August 10, 2016Publication date: May 2, 2019Applicant: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Publication number: 20190101155Abstract: A journal bearing includes: a carrier ring having an annular shape; a first bearing pad disposed on a radially inner side of a lower half region of the carrier ring and configured to support a rotor shaft from below; a first oil-supply unit disposed immediately before and upstream of the first bearing pad; a pair of side plates disposed on both end portions of the carrier ring with respect to an axial direction, along an outer periphery of the rotor shaft, Each of the side plates includes: a first region; and a second region which is positioned above the first region, and in which a gap between an inner peripheral surface of the side plate and an outer peripheral surface of the rotor shaft is narrower than that in the first region.Type: ApplicationFiled: August 10, 2016Publication date: April 4, 2019Applicant: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Patent number: 10247025Abstract: A rotating machine includes a casing (10) having a cavity (12) that a tip of a rotor blade enters, a plurality of sealing fins (17) extending from an inner circumferential surface of the cavity (12) of the casing (10) toward the tip of the rotor blade (50) and configured to seal a space between the casing (10) and the rotor blade (50), and swirl breakers (2) disposed between the plurality of sealing fins, extending from the inner circumferential surface of the cavity (12) of the casing (10) inward in the radial direction, and having swirl flow collision surface (3) with which a swirl flow collides and swirl flow transmission parts (n) formed at at least parts of the swirl flow collision surfaces (3) and through which the swirl flow passes in a circumferential direction.Type: GrantFiled: January 30, 2014Date of Patent: April 2, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuyuki Matsumoto, Takaaki Kaikogi
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Publication number: 20190072128Abstract: A bearing device includes: a carrier ring; a first bearing portion disposed along an outer periphery of a rotor shaft on a radially inner side of the carrier ring; a second bearing portion disposed along the outer periphery of the rotor shaft and downstream of the first bearing portion, with respect to a rotational direction of the rotor shaft, on the radially inner side of the carrier ring; and a pair of side plates disposed along the outer periphery of the rotor shaft, on both sides of the carrier ring with respect to an axial direction. In a carrier-ring side region of an inner peripheral surface of each of the side plates, a groove extending in a circumferential direction along a side surface of the first bearing portion is formed at least in a part of an extending range of the first bearing portion.Type: ApplicationFiled: August 10, 2016Publication date: March 7, 2019Applicant: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
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Publication number: 20190048924Abstract: A journal bearing includes: a carrier ring; a plurality of bearing pads disposed on a radially inner side of a lower half region of the carrier ring; a pair of side plates disposed on both sides of the plurality of bearing pads with respect to an axial direction of the rotor shaft; and at least one oil-supply unit for supplying lubricant oil to the plurality of bearing pads. From among the at least one oil-supply unit, a first oil-supply unit disposed on a downstream side of a most downstream pad positioned most downstream of the plurality of bearing pads is configured to supply the lubricant oil toward a region below a corner portion of the most downstream pad, of a trailing edge surface of the most downstream pad, the corner portion being formed by an intersection between a pad surface of the most downstream pad and the trailing edge surface.Type: ApplicationFiled: February 28, 2017Publication date: February 14, 2019Applicant: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
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Publication number: 20190032513Abstract: A journal bearing includes: a carrier ring; a plurality of bearing pads disposed on a radially inner side of a lower half region of the carrier ring and configured to support a rotor shaft from below; a pair of side plates disposed on both sides of the plurality of bearing pads, with respect to an axial direction of the rotor shaft; and a dam disposed on a radially inner side of the carrier ring, in a downstream section of an upper half region of the carrier ring, and configured to suppress a downstream flow of carried-over oil. A gap is provided between inner peripheral surfaces of the respective side plates and an outer peripheral surface of the rotor shaft, for bringing into communication an outside and a bearing interior space surrounded by the pair of side plates.Type: ApplicationFiled: February 28, 2017Publication date: January 31, 2019Inventors: Tanehiro SHINOHARA, Takaaki KAIKOGI, Takashi NAKANO, Yuichiro WAKI, Yutaka OZAWA, Naoto TOCHITANI
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Publication number: 20190032718Abstract: A journal bearing includes: a carrier ring; a plurality of bearing pads disposed on a radially inner side of a lower half region of the carrier ring, and configured to support a rotor shaft from below; and a guide metal disposed in an upper half region of the carrier ring, in center with respect to an axial direction of the rotor shaft, so as to cover an upper region of an outer peripheral surface of the rotor shaft.Type: ApplicationFiled: February 28, 2017Publication date: January 31, 2019Applicant: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
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Publication number: 20190010976Abstract: A journal bearing includes a carrier ring, a plurality of bearing pads disposed on a radially inner side of a lower-half region of the carrier ring and configured to support a rotor shaft from below, and a pair of side plates disposed on both sides of the plurality of bearing pads with respect to an axial direction of the rotor shaft. Each of the side plates includes a first region including a circumferential range upstream of a first bearing pad positioned furthest upstream among the plurality of bearing pads, and a second region positioned upstream of the first region and has a larger distance between an inner peripheral surface of the side plate and an outer peripheral surface of the rotor shaft than that of the first region.Type: ApplicationFiled: February 28, 2017Publication date: January 10, 2019Inventors: Tanehiro SHINOHARA, Takaaki KAIKOGI, Takashi NAKANO, Yuichiro WAKI, Yutaka OZAWA, Naoto TOCHITANI
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Publication number: 20170284386Abstract: A condition monitoring device for an extracted-gas compression system including a compressor which increases pressure of extracted gas includes: a sensor for detecting a state quantity of the extracted gas flowing into the compressor; an erosion progression level calculation unit for calculating an erosion progression level of the compressor on the basis of the state quantity of the extracted gas; and a service life evaluation unit for evaluating a service life of the compressor on the basis of the erosion progression level of the compressor.Type: ApplicationFiled: November 17, 2015Publication date: October 5, 2017Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akihiro NAKANIWA, Minoru MATSUO, Takaaki KAIKOGI
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Patent number: 9358638Abstract: A movable vacuum welding device (1) includes a vacuum chamber (7) having an edge section (12) opposite to a surface of a welding target (T) and forming a vacuum space between the surface of the welding target (T) and the vacuum chamber (7), a seal section (8) interposed between the edge section (12) and the welding target (T) throughout the entire circumference of the edge section (12), a welding head (9) configured to perform welding on the surface of the welding target (T) in the vacuum space, and a preload unit (10) configured to previously apply a load to the seal section (8). The seal section (8) includes a first seal member (27) formed of an elastic material and extending along the edge section (12), and a second seal member (28) disposed at least a rear side in a relative moving direction in which a welding bead (W) passes and having higher flexibility than the first seal member (27).Type: GrantFiled: July 26, 2013Date of Patent: June 7, 2016Assignee: MITSUBISHI HEAVY INDUSTRIES MACHINE TOOL CO., LTD.Inventors: Takumi Hori, Yasuyuki Fujiya, Takehisa Okuda, Osamu Hasegawa, Katsuya Sennyu, Masao Watanabe, Takaaki Kaikogi
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Publication number: 20160047265Abstract: A rotating machine includes a casing (10) having a cavity (12) that a tip of a rotor blade enters, a plurality of sealing fins (17) extending from an inner circumferential surface of the cavity (12) of the casing (10) toward the tip of the rotor blade (50) and configured to seal a space between the casing (10) and the rotor blade (50), and swirl breakers (2) disposed between the plurality of sealing fins, extending from the inner circumferential surface of the cavity (12) of the casing (10) inward in the radial direction, and having swirl flow collision surface (3) with which a swirl flow collides and swirl flow transmission parts (n) formed at at least parts of the swirl flow collision surfaces (3) and through which the swirl flow passes in a circumferential direction.Type: ApplicationFiled: January 30, 2014Publication date: February 18, 2016Inventors: Kazuyuki MATSUMOTO, Takaaki KAIKOGI