Patents by Inventor Tanehiro Shinohara

Tanehiro Shinohara 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: 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
  • 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
  • Patent number: 10190433
    Abstract: A shaft sealing mechanism (11) that partitions an annular space (14) that is formed between a fixed part (12) and a rotating shaft (13) into a high-pressure-side region and a low-pressure-side region, that obstructs the flow of a fluid (G), and that is provided with: a plurality of annularly laminated thin-plate seal pieces (22) that are fixed to an annular seal housing (21) that is provided to the fixed part and are in sliding contact with the rotating shaft; and an annular low-pressure-side plate (26) that is sandwiched and held such that a low-pressure-side gap (?L) is formed between the seal housing and a low-pressure-side side edge part (22d) of the thin-plate seal pieces. The thin-plate seal pieces have a thick part (31) that is formed further to the inside in the radial direction of the rotating shaft than an inner-circumferential-side tip part (26a) of the low-pressure-side plate.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: January 29, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Kohei Ozaki, Azumi Yoshida, Hidekazu Uehara, Tanehiro Shinohara, Hiroharu Oyama
  • 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: 9841104
    Abstract: Provided is a shaft sealing apparatus, which includes a seal ring that is installed in an annular space between a rotor and a stator surrounding an outer circumference side of the rotor, that is formed in a divided structure from a movable seal ring and a stationary seal ring whose circumferential ends are adjacent to each other, and that is configured so that the movable seal ring is biased toward a radial outer side thereof by an elastic body, a seal body that is formed by stacking a plurality of thin seal pieces, which extend from the seal ring toward a radial inner side of the rotor, in a circumferential direction of the rotor, and a communicating part that causes the low-pressure side region and the high-pressure side region to communicate with each other.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: December 12, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Shin Nishimoto, Takashi Nakano
  • Patent number: 9841109
    Abstract: A shaft seal structure capable of preventing a seal body of the shaft seal structure of a rotation body from being held in an inclined posture even when the seal body is inclined is provided. It includes, an accommodation body (9), a seal body (12) including thin plate seal pieces (20), and a plate body (17) covering one end in the axial direction (20d) of the seal body (12). A recessed portion (31) recessing in the axis direction, and a protruding portion projecting to the other side from the recessed portion (31) are formed on one of the plate surface (17c) of the plate body (17) and the inner wall surface (9e) of the accommodation body (9). When the protruding portion abuts the other side and a pocket (X), the recessed portion (31) communicates with the pocket (X) and the fluid low pressure region.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: December 12, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Shin Nishimoto, Takashi Nakano, Masato Araki, Tatsuji Takahashi
  • Publication number: 20170350267
    Abstract: A shaft sealing mechanism (11) that partitions an annular space (14) that is formed between a fixed part (12) and a rotating shaft (13) into a high-pressure-side region and a low-pressure-side region, that obstructs the flow of a fluid (G), and that is provided with: a plurality of annularly laminated thin-plate seal pieces (22) that are fixed to an annular seal housing (21) that is provided to the fixed part and are in sliding contact with the rotating shaft; and an annular low-pressure-side plate (26) that is sandwiched and held such that a low-pressure-side gap (?L) is formed between the seal housing and a low-pressure-side side edge part (22d) of the thin-plate seal pieces. The thin-plate seal pieces have a thick part (31) that is formed further to the inside in the radial direction of the rotating shaft than an inner-circumferential-side tip part (26a) of the low-pressure-side plate.
    Type: Application
    Filed: December 15, 2015
    Publication date: December 7, 2017
    Inventors: Kohei OZAKI, Azumi YOSHIDA, Hidekazu UEHARA, Tanehiro SHINOHARA, Hiroharu OYAMA
  • Patent number: 9677669
    Abstract: Disclosed is a shaft seal device comprising: a seal body made by layering a plurality of thin-plate seal pieces in the circumferential direction of the rotor, and a housing that is fixed to the stator, holds the seal body so as to surround the same from radially outside, and includes a first facing surface that faces the high-pressure-side edge of the seal body and a second facing surface that faces the low-pressure-side edge of the seal body. The high-pressure-side clearance between the seal body and the first facing surface is smaller than the low-pressure-side clearance between the seal body and the second facing surface, and a slope part that slopes gradually toward the high-pressure side toward the tip end, which is on the rotor side, is formed in the low-pressure-side edge of each thin-plate seal piece of the seal body.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: June 13, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Hidekazu Uehara, Shin Nishimoto, Tanehiro Shinohara, Hiroharu Oyama
  • Patent number: 9677410
    Abstract: A shaft sealing device and a rotary machine equipped therewith are provided with a sealing body configured by stacking a plurality of thin sealing pieces; and a low-pressure-side side sealing plate in which a plate surface facing the low-pressure side is pressed against an inner wall surface of the housing facing the direction of the axis by means of the pressure of a fluid applied from a high-pressure side to the low-pressure side. A protrusion for blocking a downward flow toward the inside of the low-pressure-side side sealing plate in the radial direction along the low-pressure side of the sealing body is formed on the inside of the low-pressure-side side sealing plate in the radial direction, and a communication path for guiding the downward flow blocked by means of the protrusion to a low-pressure-side region is formed on the housing.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: June 13, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tanehiro Shinohara, Hidekazu Uehara, Shin Nishimoto, Takashi Nakano
  • Patent number: 9644744
    Abstract: Disclosed is a shaft sealing device including: a housing in which an annular recessed portion is formed and which is fixed to a stator; a sealing body, a radially outer portion of which is accommodated by the annular recessed portion; and a high pressure-side sealing plate that is disposed along the sealing body in a high pressure region. An inflow groove is formed in any member of the housing, the high pressure-side sealing plate, and the sealing body such that a fluid flows through the sealing body from a low pressure region during a non-normal operation in which pressure in the high pressure region is higher than pressure in the high pressure region. A communication path is formed in the housing such that the inflow groove and a space in the high pressure region communicate with each other via the communication path.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: May 9, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shin Nishimoto, Hidekazu Uehara, Takashi Nakano, Tanehiro Shinohara
  • Patent number: 9593588
    Abstract: An inner wall surface of a low-pressure-side side plate opposite to a lateral surface of a thin plate is formed along a direction crossing an axial direction of a rotating shaft such that a gap between the inner wall surface and the thin plate gradually decreases from a radially inner side toward a radially outer side of the low-pressure-side side plate.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: March 14, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hitoshi Morimoto, Keizo Tsukagoshi, Junichiro Masada, Tatsuji Takahashi, Masato Araki, Tanehiro Shinohara, Hidekazu Uehara