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).

  • Patent number: 10738822
    Abstract: 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: Grant
    Filed: February 28, 2017
    Date of Patent: August 11, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
  • Patent number: 10724573
    Abstract: 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: Grant
    Filed: August 10, 2016
    Date of Patent: July 28, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
  • Patent number: 10514058
    Abstract: 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: Grant
    Filed: August 10, 2016
    Date of Patent: December 24, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
  • Patent number: 10514062
    Abstract: 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: Grant
    Filed: August 10, 2016
    Date of Patent: December 24, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
  • Patent number: 10508565
    Abstract: 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: Grant
    Filed: February 28, 2017
    Date of Patent: December 17, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
  • Patent number: 10451105
    Abstract: 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: Grant
    Filed: February 28, 2017
    Date of Patent: October 22, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
  • Publication number: 20190128321
    Abstract: 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: Application
    Filed: August 10, 2016
    Publication date: May 2, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
  • Publication number: 20190101155
    Abstract: 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: Application
    Filed: August 10, 2016
    Publication date: April 4, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
  • Patent number: 10247025
    Abstract: 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: Grant
    Filed: January 30, 2014
    Date of Patent: April 2, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kazuyuki Matsumoto, Takaaki Kaikogi
  • Publication number: 20190072128
    Abstract: 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: Application
    Filed: August 10, 2016
    Publication date: March 7, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Takashi Nakano, Tanehiro Shinohara, Takaaki Kaikogi, Yuichiro Waki, Yutaka Ozawa
  • Publication number: 20190048924
    Abstract: 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: Application
    Filed: February 28, 2017
    Publication date: February 14, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
  • Publication number: 20190032718
    Abstract: 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: Application
    Filed: February 28, 2017
    Publication date: January 31, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Tanehiro Shinohara, Takaaki Kaikogi, Takashi Nakano, Yuichiro Waki, Yutaka Ozawa, Naoto Tochitani
  • Publication number: 20190032513
    Abstract: 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: Application
    Filed: February 28, 2017
    Publication date: January 31, 2019
    Inventors: Tanehiro SHINOHARA, Takaaki KAIKOGI, Takashi NAKANO, Yuichiro WAKI, Yutaka OZAWA, Naoto TOCHITANI
  • Publication number: 20190010976
    Abstract: 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: Application
    Filed: February 28, 2017
    Publication date: January 10, 2019
    Inventors: Tanehiro SHINOHARA, Takaaki KAIKOGI, Takashi NAKANO, Yuichiro WAKI, Yutaka OZAWA, Naoto TOCHITANI
  • Publication number: 20170284386
    Abstract: 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: Application
    Filed: November 17, 2015
    Publication date: October 5, 2017
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akihiro NAKANIWA, Minoru MATSUO, Takaaki KAIKOGI
  • Patent number: 9358638
    Abstract: 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: Grant
    Filed: July 26, 2013
    Date of Patent: June 7, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES MACHINE TOOL CO., LTD.
    Inventors: Takumi Hori, Yasuyuki Fujiya, Takehisa Okuda, Osamu Hasegawa, Katsuya Sennyu, Masao Watanabe, Takaaki Kaikogi
  • Publication number: 20160047265
    Abstract: 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: Application
    Filed: January 30, 2014
    Publication date: February 18, 2016
    Inventors: Kazuyuki MATSUMOTO, Takaaki KAIKOGI
  • Publication number: 20150258633
    Abstract: 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 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: Application
    Filed: July 26, 2013
    Publication date: September 17, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takumi Hori, Yasuyuki Fujiya, Takehisa Okuda, Osamu Hasegawa, Katsuya Sennyu, Masao Watanabe, Takaaki Kaikogi
  • Patent number: 8602654
    Abstract: A bearing temperature monitoring device and bearing device provided with the monitoring device composed so that occurrence of scratch on the rotation shaft supported by the bearing caused by a bearing temperature carrying member integrated in the bearing such that its top end surface faces the rotation shaft, are provided.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Takaaki Kaikogi, Kazuhiko Yamashita, Takashi Nakano, Yuichiro Waki, Motohisa Uesato, Yutaka Yamada
  • Patent number: 8408801
    Abstract: An oiling nozzle for a thrust bearing improves the following capability of pads and achieves a higher bearing pressure of the thrust bearing. The oiling nozzles are arranged between respective pads disposed in positions facing the thrust surface of a thrust collar that protrudes radially outward from a rotor shaft, along the circumferential direction. Each oiling nozzle has a cylindrical stem and a rectangular-shaped mainframe whose heightwise middle portions of opposite lateral sides are provided with convex parts. Each convex part presents a semicircular disk shape in a plane view to be fitted into concave parts that are formed in lateral sides of the pads. A top portion located on a side opposite to the stem is formed with a plurality of nozzle holes for ejecting lubricating oil that has been supplied from the bottom of the stem toward a space between the thrust collar and the pads.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 2, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yuichiro Waki, Takashi Nakano, Takaaki Kaikogi