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: 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
  • Patent number: 9488279
    Abstract: Provided is a method of fabricating a shaft sealing device, in which a plurality of thin plate pieces arranged in a circumferential direction of a rotation shaft are provided and base ends of the thin plate pieces are mutually connected, the method including a stacking step of stacking the plurality of thin plate pieces in one direction, a connecting step of mutually connecting the base ends of the plurality of stacked thin plate pieces to form a stacked body, and a first smoothing step of bringing one lateral end surface of two lateral end surfaces of the stacked body formed by each end portion in a width direction of the plurality of thin plate pieces in contact with a flat surface to smooth the other lateral end surface.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: November 8, 2016
    Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., EAGLE INDUSTRY CO., LTD.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Publication number: 20160258536
    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: Application
    Filed: October 18, 2013
    Publication date: September 8, 2016
    Inventors: Shin NISHIMOTO, Hidekazu UEHARA, Takashi NAKANO, Tanehiro SHINOHARA
  • Patent number: 9404375
    Abstract: A shaft seal device includes a seal piece-laminated body with a plurality of thin seal pieces laminated in a circumferential direction along a rotating shaft. Outer ends of the plurality of thin seal pieces in the radial direction are connected to each other. Inner ends of the thin seal pieces in the radial direction are formed as free ends. A small gap is formed between each adjacent pair of the thin seal pieces. A small gap is formed between the rotating shaft and the seal piece-laminated body. A wear-resistant treatment layer is formed on a surface of a portion of each of the thin seal pieces close to the inner end.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: August 2, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Publication number: 20160010751
    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: Application
    Filed: February 13, 2014
    Publication date: January 14, 2016
    Inventors: Hidekazu UEHARA, Shin NISHIMOTO, Tanehiro SHINOHARA, Hiroharu OYAMA
  • Patent number: 9103223
    Abstract: A shaft sealing device is provided in an annular space between a rotor and a stator surrounding an outer periphery of the rotor, and divides the annular space in the direction of an axis of the rotor into a high-pressure region and a low-pressure region. The shaft sealing device includes a seal body obtained by stacking a plurality of thin plate sealing pieces in a circumferential direction of the rotor; and a high-pressure side plate that extends from the stator toward the radial inner side so as to run along the high-pressure side of the seal body, and is segmented into a plurality of portions in the circumferential direction, and includes a rigidity imparting member configured to impart rigidity in the direction of the axis to a portion of the surface of the high-pressure side plate that faces the high-pressure region.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: August 11, 2015
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Yukihiro Hashimoto, Shin Nishimoto, Takashi Nakano, Masato Araki, Keita Takamura
  • Patent number: 9091348
    Abstract: A shaft sealing apparatus is installed in an annular space between a rotor and a stator in a rotating machine and divides the annular space into a low-pressure side region and a high-pressure side region in an axial direction of the rotor. The shaft sealing apparatus includes a seal body formed by stacking a plurality of thin seal pieces, which extend from the stator toward a radial inner side of the rotor, in a circumferential direction of the rotor, and lateral plates having a surface facing the axial direction and curved and extending in a circumferential direction of the annular space. The seal body is welded to the surfaces of the lateral plates which face the axial direction so that the seal body follows a curved shape of the lateral plates.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: July 28, 2015
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tanehiro Shinohara, Hidekazu Uehara, Shin Nishimoto, Hiroharu Oyama, Takashi Nakano
  • Patent number: 9046179
    Abstract: An axial seal structure includes a high-pressure-side regulating member configured to regulate the flow of a fluid from a high-pressure-side region to multiple thin sheet seal pieces arranged with a minute gap between each of the multiple thin sheet seal pieces in a circumferential direction along a high pressure side of the multiple thin sheet seal pieces and along an outer peripheral surface of a rotating shaft. The high-pressure-side regulating member has multiple wires that are flexible. Respective longitudinal directions of the multiple wires are directed towards a direction having a radial component of the rotating shaft. Tips that are radial inner ends of the wires form free ends, and are in close proximity to or in contact with the outer peripheral surface of the rotating shaft. The wires that are adjacent to each other in the circumferential direction come into contact with each other partially in the longitudinal directions.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: June 2, 2015
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Patent number: 8844288
    Abstract: A steam turbine facility is provided which is capable of appropriately sealing a gap between members made of cast material of Ni-based alloy even under the steam-temperature condition of 650° C. or higher, and which includes a first member and a second member whose base material is formed of cast material composed of at least one of Ni-based alloy, austenite steel, or high-chrome steel, form a space where the steam of 650° C. or higher flows. Between the first member and the second member, a metal gasket is provided which has a plurality of portions in line contact with the first member and the second member. On the first member and the second member, a first high-hardness layer which is harder than the base material, is provided at least in a portion where each of the first member and the second member is in line contact with the metal gasket.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: September 30, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shin Nishimoto, Katsuhisa Hamada, Yoshinori Tanaka, Tanehiro Shinohara, Tetsuro Akamatsu
  • Publication number: 20140241877
    Abstract: A shaft sealing device is provided in an annular space between a rotor and a stator surrounding an outer periphery of the rotor, and divides the annular space in the direction of an axis of the rotor into a high-pressure region and a low-pressure region. The shaft sealing device includes a seal body obtained by stacking a plurality of thin plate sealing pieces in a circumferential direction of the rotor; and a high-pressure side plate that extends from the stator toward the radial inner side so as to run along the high-pressure side of the seal body, and is segmented into a plurality of portions in the circumferential direction, and includes a rigidity imparting member configured to impart rigidity in the direction of the axis to a portion of the surface of the high-pressure side plate that faces the high-pressure region.
    Type: Application
    Filed: October 25, 2012
    Publication date: August 28, 2014
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Yukihiro Hashimoto, Shin Nishimoto, Takashi Nakano, Masato Aaki, Keita Takamura
  • Publication number: 20140000258
    Abstract: A steam turbine facility is provided which is capable of appropriately sealing a gap between members made of cast material of Ni-based alloy even under the steam-temperature condition of 650° C. or higher, and which includes a first member and a second member whose base material is formed of cast material composed of at least one of Ni-based alloy, austenite steel, or high-chrome steel, form a space where the steam of 650° C. or higher flows. Between the first member and the second member, a metal gasket is provided which has a plurality of portions in line contact with the first member and the second member. On the first member and the second member, a first high-hardness layer which is harder than the base material, is provided at least in a portion where each of the first member and the second member is in line contact with the metal gasket.
    Type: Application
    Filed: December 28, 2012
    Publication date: January 2, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shin NISHIMOTO, Katsuhisa HAMADA, Yoshinori TANAKA, Tanehiro SHINOHARA, Tetsuro AKAMATSU
  • Publication number: 20130259680
    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: Application
    Filed: December 20, 2011
    Publication date: October 3, 2013
    Inventors: Tanehiro Shinohara, Hidekazu Uehara, Shin Nishimoto, Takashi Nakano
  • Publication number: 20130234397
    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: Application
    Filed: January 31, 2013
    Publication date: September 12, 2013
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hidekazu UEHARA, Tanehiro SHINOHARA, Shin NISHIMOTO, Takashi NAKANO
  • Publication number: 20130230393
    Abstract: An inner wall surface of a low-pressure-side side plate opposite to a lateral surface of a thin plats 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: Application
    Filed: February 21, 2013
    Publication date: September 5, 2013
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hitoshi Morimoto, Keizo Tsukagoshi, Junichiro Masada, Tatsuji Takahashi, Masato Araki, Tanehiro Shinohara, Hidekazu Uehara
  • Publication number: 20130154195
    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: Application
    Filed: October 26, 2011
    Publication date: June 20, 2013
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Shin Nishimoto, Takashi Nakano, Masato Araki, Tatsuji Takahashi
  • Patent number: 8413992
    Abstract: A shaft seal that is constituted by annularly arranging a plurality of seal segments in the circumferential direction of a rotating shaft, in which each seal segment has a plurality of thin plates that are provided in a predetermined arrangement in the circumferential direction of the rotating shaft, side plates that sandwich the plurality of thin plates from both sides thereof in the axial direction, and retention rings that retain the base ends of the plurality of thin plates and the base ends of the side plates; the distal ends of the thin plates protrude farther toward the rotating shaft than the distal ends of the side plates, and the protrusion length of the distal ends of the thin plates in the vicinity of the end portions in the circumferential direction where adjacent seal segments are connected is set to be less than the protrusion length of the distal ends of the thin plates that are located at the middle of the seal segment in the circumferential direction.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: April 9, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Publication number: 20130069316
    Abstract: An axial seal structure includes a high-pressure-side regulating member (30) that regulates the flow of a fluid from a high pressure side to multiple thin sheet seal pieces (20) arranged with minute gaps from each other in the circumferential direction along the high pressure side of the multiple thin sheet seal pieces (20) and along an outer periphery of a rotating shaft (6). The high-pressure-side regulating member (30) has flexible multiple wires (35). Longitudinal directions of the multiple wires (35) are directed towards a direction having a radial component of the rotating shaft (6). Tips (35b) that are radial inner ends of the wires form free ends, and are brought into close proximity to or into contact with the outer peripheral surface of the rotating shaft (6). The wires (35) that are adjacent to each other in the circumferential direction come into contact with each other partially in the longitudinal directions.
    Type: Application
    Filed: June 23, 2011
    Publication date: March 21, 2013
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Publication number: 20130004310
    Abstract: Provided is a method of fabricating a shaft sealing device, in which a plurality of thin plate pieces arranged in a circumferential direction of a rotation shaft are provided and base ends of the thin plate pieces are mutually connected, the method including a stacking step of stacking the plurality of thin plate pieces in one direction, a connecting step of mutually connecting the base ends of the plurality of stacked thin plate pieces to form a stacked body, and a first smoothing step of bringing one lateral end surface of two lateral end surfaces of the stacked body formed by each end portion in a width direction of the plurality of thin plate pieces in contact with a flat surface to smooth the other lateral end surface.
    Type: Application
    Filed: April 28, 2011
    Publication date: January 3, 2013
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Publication number: 20120261884
    Abstract: There is provided a shaft seal device comprising a seal piece-laminated body (12) where a plurality of thin seal pieces (20) are laminated in the circumferential direction along a rotating shaft, outer ends of the plurality of thin seal pieces in the radial direction are connected to each other, inner ends (20b) of the thin seal pieces in the radial direction are formed as free ends, a small gap (s) is formed at every two thin seal pieces adjacent to each other, and a small gap (s) is formed between the rotating shaft and the seal piece-laminated body (12). A wear-resistant treatment layer (25) is formed on the surface of a portion of the thin seal piece close to the inner end.
    Type: Application
    Filed: January 28, 2011
    Publication date: October 18, 2012
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto