Patents by Inventor Yuichiro Waki

Yuichiro Waki 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).

  • Publication number: 20200277985
    Abstract: A tilting pad bearing including pads disposed around a rotating shaft so as to face an outer peripheral surface of the rotating shaft, liners each supporting an outside of the pad in a radial direction with an axis of the rotating shaft as a center, and pivots each supporting an outside of the liner in the radial direction with the axis as a center at a central position of the liner in an axial direction of the rotating shaft so as to allow the pad to be swingable, wherein a recessed portion recessed in a direction away from the pad is formed on a surface of the liner facing the pad or a surface of the pad facing the liner at least at the central position thereof in the axial direction of the rotating shaft.
    Type: Application
    Filed: October 24, 2018
    Publication date: September 3, 2020
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Chihiro Yoshimine, Tanehiro Shinohara, Takuzo Shigihara, Shuichi Isayama, Yuichiro Waki
  • 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
  • Publication number: 20200232502
    Abstract: A support part supporting a bearing pad (60) from an outer circumferential side so as to be swingable at a pivot position (P2) is provided. When the radius of curvature of a rotary shaft (10) is Rj, the radius of curvature of a pad surface (62) is Rp, and the radius of curvature of a reference circle (S) centered at an axial line (O) and having a radius equal to the distance between the center (O) and the pivot position (P2) on the pad surface (62) is Rb, the relationship of Rj<Rp<Rb is established.
    Type: Application
    Filed: September 6, 2017
    Publication date: July 23, 2020
    Inventors: Shimpei YOKOYAMA, Tadasuke NISHIOKA, Chihiro YOSHIMINE, Yuichiro WAKI, Yuki SUMI
  • Publication number: 20200095878
    Abstract: A vane segment includes a blade ring, a plurality of vanes, and a caulking member. The blade ring includes a blade ring groove and a storage space forming portion. The blade ring groove includes a convex portion projecting from a second groove side surface of the blade ring groove to the first side. The storage space forming portion, in combination with an outer shroud, forms a storage space into which the caulking member enters. The caulking member is accommodated within the storage space, contacts with the blade ring groove and the outer shroud, and is exposed from an inner opening of the storage space.
    Type: Application
    Filed: October 23, 2018
    Publication date: March 26, 2020
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Yuichiro Waki, Shouhei Danno, Yuki Yamamoto
  • 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
  • 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
  • Patent number: 9551224
    Abstract: The turbine includes: a shaft body supported rotatably; a plurality of turbine blade members; a casing covering the shaft body and the turbine blade row; an outer ring member that is provided on an inner periphery of the casing and includes an inner peripheral portion in which a cross-section having a uneven shape is continuous in a circumferential direction; a plurality of turbine vane members that each has a shroud fitted into the inner peripheral portion of the outer ring member and a turbine vane main body extending from the shroud to a radially inward side; and a plate member that connects at least some of the plurality of turbine vane members and covers one side of the shrouds in the axial direction, thereby sealing a shroud gap formed between the shrouds adjacent to each other in the circumferential direction.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: January 24, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Tomoyuki Onishi, Yuichiro Waki, Shoki Yamashita, Takaaki Matsuo, Asaharu Matsuo
  • Patent number: 8911152
    Abstract: The bearing device has a support ring positioned around a rotating shaft and a plurality of bearing pads provided between the rotating shaft and the support ring and configured to support the rotating shaft. Some of the plurality of bearing pads are positioned at a lower side of the rotating shaft, and a key member is installed between the support ring and a carrier ring supporting the plurality of bearing pads. The key member is inserted therebetween in a tangential direction of an outer circumference of the carrier ring and is configured to perform positioning of the plurality of bearing pads and the support ring in a radial direction.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: December 16, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yuichiro Waki, Yasuyuki Tatsumi, Hideaki Sato, Hirokazu Shirai
  • 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
  • Publication number: 20130272635
    Abstract: The bearing device is provided with: a support ring positioned around a rotating shaft; and a plurality of bearing pads provided between the rotating shaft and the support ring and configured to support the rotating shaft, wherein some of the plurality of bearing pads are positioned at a lower side of the rotating shaft, and a key member is installed between the support ring and a carrier ring supporting the plurality of bearing pads, wherein the key member is inserted therebetween in a tangential direction of an outer circumference of the carrier ring and is configured to perform positioning of the plurality of bearing pads and the support ring in a radial direction.
    Type: Application
    Filed: February 8, 2013
    Publication date: October 17, 2013
    Inventors: Yuichiro WAKI, Yasuyuki TATSUMI, Hideaki SATO, Hirokazu SHIRAI