Patents by Inventor Shin Nishimoto

Shin Nishimoto 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: 10619505
    Abstract: A clearance-control-type seal structure including a plurality of arc-shaped grooves (23) formed side by side in the axial direction with respect to an inner circumferential surface of a housing (22) of a turbine; and abradable seal rings (11, 12) having fitting parts (11a, 12a) that are fitted into the grooves so as to leave a prescribed gap, that have extended parts (11b, 12b) that are exposed from the housing in the radial direction toward the inside and expand in the axial direction, and that, during operation, due to back pressure inside the grooves, receive a force that moves in the radial direction toward the inside. One extended part has a protruding part extending even further in the axial direction toward the upstream side, and the other extended part has formed in an outer circumferential surface of a downstream-side end part thereof a recessed part that corresponds to the protruding part.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: April 14, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Kohei Ozaki, Hidekazu Uehara, Shin Nishimoto
  • Patent number: 10590508
    Abstract: A method for manufacturing a shaft body by welding a plurality of shaft members together and forming the shaft body, the method including: a primary tempering step of subjecting a range in at least one of the shaft members, which is in the vicinity of an end of another shaft member side adjacent thereto, to tempering before the shaft members are welded together so that a strength of an end side of a region thereof is lower than a strength at a side which is opposite to the end of the region thereof; a welding step of welding the shaft members together after the primary tempering step; and a secondary tempering step of tempering the vicinity of a weld part between the shaft members after the welding step.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: March 17, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yuichi Hirakawa, Hiroaki Fukushima, Shin Nishimoto, Hiroyuki Endo
  • Patent number: 10519791
    Abstract: A shaft sealing device includes a plurality of leaves that is arranged in a periphery of a rotating shaft and divides a space around the rotating shaft into two spaces in an axial direction of the rotating shaft, and a side seal plate that is arranged on one side of the plurality of leaves in the axial direction of the rotating shaft and has an opposite surface facing a side end on one side of the plurality of leaves. The side seal plate has a friction reducing portion for reducing a friction force between the opposite surface of the side seal plate and a surface of the side end on the one side of the plurality of leaves.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: December 31, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Azumi Yoshida, Hidekazu Uehara, Kohei Ozaki, Shin Nishimoto
  • Patent number: 10385714
    Abstract: In a seal structure that seals a gap between a first structure and a second structure which faces the first structure in a radial direction and rotates relative to the first structure, one of the first structure and the second structure has a base surface and a step surface that protrudes toward the other side from the base surface, and the other is provided with: a first fin which extends toward the step surface and forms a first gap between the step surface; a second fin that, on the downstream side of the first fin, extends toward the base surface and forms a second gap between the base surface; and a protrusion part that is disposed between the first fin and the second fin and that divides a leak flow, into a first vortex along the first fin and a second vortex along the second fin.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: August 20, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yoshihiro Kuwamura, Kazuyuki Matsumoto, Hiroharu Oyama, Yoshinori Tanaka, Toyoharu Nishikawa, Hidekazu Uehara, Shin Nishimoto
  • Publication number: 20190200666
    Abstract: A sheet-shaped food product is a sheet-shaped food product molded by containing a raw food material and a binding agent, in which the sheet-shaped food product is provided with a surface layer at both sides and an inner side layer, which is present between the surface layers and has lower density than each surface layer, and mass ratio (WA/WB) of dry mass of the raw food material (WA) to dry mass of the binding agent 3 (WB) is 4.9 to 7.3.
    Type: Application
    Filed: August 29, 2018
    Publication date: July 4, 2019
    Applicant: TANAKA FOODS CO.,LTD.
    Inventors: Shigeki TANAKA, Yoshiharu FUJINAKA, Fumio NISHIMOTO, Shin IGUCHI
  • Patent number: 10316679
    Abstract: A seal structure (2) for sealing a gap between a first structure body (10) and a second structure body (51). The seal structure includes: a peripheral surface formed on one of the first structure body and the second structure body; a plurality of seal fins (5) provided at intervals in the axial direction so as to form clearances (m) together with the peripheral surface and protrusions that form re-adhesion edges between pairs of axially adjacent seal fins; the re-adhesion edges being locations at which leak currents (SL) re-adhere that have passed through a clearance (mA) of an upstream seal fin; and the protrusions forming first cavities in which eddies (B1) are created that flow along the upstream seal fin toward the second structure body, and second cavities in which currents (B2) are created that cause a contraction current effect on a clearance (mB) of a downstream seal fin.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: June 11, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Toyoharu Nishikawa, Yoshihiro Kuwamura, Hiroharu Oyama, Yoshinori Tanaka, Shin Nishimoto, Kazuyuki Matsumoto, Hidekazu Uehara
  • Publication number: 20190162120
    Abstract: A seal segment (11) includes a retainer (21), a seal body (13) having a thin plate seal piece (20), a high-pressure side plate (23), a low-pressure side plate, a retainer simulating section (51) further extending in the circumferential direction (Dc) from an end portion of the retainer (21) in the circumferential direction (Dc), and a block body (50) including a seal body simulation section (53) extending inward in the radial direction (Dr) from the retainer simulation section. The high-pressure side plate (23) and the low-pressure side plate cover at least a part of the seal body simulation section (53) of the block body (50).
    Type: Application
    Filed: April 21, 2017
    Publication date: May 30, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Azumi YOSHIDA, Hidekazu UEHARA, Shin NISHIMOTO, Naoya TATSUMI, Kohei OZAKI
  • Publication number: 20190145320
    Abstract: A seal segment (11) includes a seal body having a plurality of laminated thin plate seal pieces (20), and a high-pressure side plate (23). The high-pressure side plate (23) includes an outer diameter side edge portion (23b) which is an outer edge portion in the radial direction (Dr) and extends in a circular are shape in the circumferential direction (Dc), an inner diameter side edge portion (23c) which is an inner edge portion in a radial direction (Dr) and extends in a circular arc shape in the circumferential direction (Dc), and a front edge portion (23d) which is an edge portion on a front side in the rotational direction (Bc). The high-pressure side plate (23) further includes a reinforcing portion (40) only in a region of the high-pressure side plate (23) on the front side in the rotational direction (Bc).
    Type: Application
    Filed: April 19, 2017
    Publication date: May 16, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Azumi Yoshida, Hidekazu Uehara, Shin Nishimoto, Naoya Tatsumi, Kohei Ozaki
  • Publication number: 20190136766
    Abstract: A seal segment includes a retainer extending in a circumferential direction of a rotary shaft on an outer circumferential side of the rotary shaft; a first seal body which has a plurality of first thin plate seal pieces extending inward in a radial direction from the retainer and laminated in the circumferential direction; a high-pressure side plate; a low-pressure side plate; and a second seal body having a plurality of second thin plate seal pieces which are laminated at an end portion of the retainer in the circumferential direction, extend inward in the radial direction, and have fluttering resistance higher than the first thin plate seal piece. The high-pressure side plate and the low-pressure side plate cover at least a part of the second seal body in the circumferential direction.
    Type: Application
    Filed: May 2, 2017
    Publication date: May 9, 2019
    Applicants: Mitsubishi Hitachi Power Systems, Ltd., Eagle Industry Co., Ltd.
    Inventors: Azumi YOSHIDA, Hidekazu UEHARA, Shin NISHIMOTO, Naoya TATSUMI, Kohei OZAKI, Toru KONO, Ryu KIKUCHI
  • Publication number: 20190048734
    Abstract: A rotary machine includes: a stationary body having a stationary-side peripheral surface; a rotating body having a rotating-side peripheral surface facing the stationary side-peripheral surface. One surface which is one of the stationary-side peripheral surface and the rotating-side peripheral surface has an upstream-side peripheral surface, a downstream-side peripheral surface, and a rearward step surface. The other surface has an upstream-side seal fin forming a minute gap between the upstream-side seal fin and the upstream-side peripheral surface; a downstream-side seal fin forming a minute gap between the downstream-side seal fin and the downstream-side peripheral surface. The rearward step surface has a guide surface extending downstream Da2 while directed toward the other surface and connected to the upstream-side peripheral surface.
    Type: Application
    Filed: February 17, 2017
    Publication date: February 14, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Yoshihiro Kuwamura, Eiji Konishi, Toyoharu Nishikawa, Shin Nishimoto, Hidekazu Uehara
  • Publication number: 20180371927
    Abstract: A seal structure is for sealing leakage fluid flowing through a gap between a rotation member rotating about a rotation axis and a stationary member facing the rotation member. The seal structure includes seal fins projecting from a base that is one of the rotation and stationary members toward the other one, the seal fins being spaced apart from each other at a certain interval in an axial direction of the rotation axis; and a step section provided to the other one, the step section including step surfaces facing the seal fins and a riser surface between the adjacent step surfaces, the step surfaces and the riser surface defining a step portion. The seal fins are inclined upstream in a flow direction of the leakage fluid relative to a radial direction perpendicular to the rotation axis. Each seal fin and the base define a corner portion having a curved surface.
    Type: Application
    Filed: November 24, 2016
    Publication date: December 27, 2018
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yoshihiro Kuwamura, Eiji Konishi, Toyoharu Nishikawa, Shin Nishimoto, Hidekazu Uehara
  • Patent number: 10024434
    Abstract: A rotary machine (100) includes a rotor (5) that rotates about an axis, a seal housing (30) that is disposed so as to face an outer peripheral surface of the rotor (5), and a seal body (10) that includes a plurality of thin plates (20) extending inward from the seal housing (30) in a radial direction and laminated in a circumferential direction. One thin plate (20) of the plurality of thin plates (20) has a shape in which the thin plate comes into contact with the other thin plates (20) provided on front and rear sides in a rotational direction in a state in which the thin plate does not come into contact with the rotor (5).
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: July 17, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kohei Ozaki, Hidekazu Uehara, Shin Nishimoto
  • Patent number: 9879786
    Abstract: A rotary machine includes turbine moving blades (50); a casing (10) covering the turbine moving blades (50) so as to define a gap at an outer circumferential side of the turbine moving blades; a leaf seal (70) having a seal body (71) that is disposed in the gap so as to protrude radially inward from the casing (10) and is capable of coming into contact with the turbine moving blades (50), and a high-pressure-side plate member (73) that is disposed along a face facing a high pressure side of the seal body (71); and a swirling flow inhibitor (80) that is provided on the high pressure side of the leaf seal (70) in the gap and inhibits a swirl flow flowing through the gap in a circumferential direction.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: January 30, 2018
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yoshihiro Kuwamura, Koichi Ishizaka, Yoshiyuki Okabe, Kazuyuki Matsumoto, Hiroharu Oyama, Hidekazu Uehara, Yoshinori Tanaka, Shin Nishimoto
  • 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: 20170328232
    Abstract: A clearance-control-type seal structure including a plurality of arc-shaped grooves (23) formed side by side in the axial direction with respect to an inner circumferential surface of a housing (22) of a turbine; and abradable seal rings (11, 12) having fitting parts (11a, 12a) that are fitted into the grooves so as to leave a prescribed gap, that have extended parts (11b, 12b) that are exposed from the housing in the radial direction toward the inside and expand in the axial direction, and that, during operation, due to back pressure inside the grooves, receive a force that moves in the radial direction toward the inside. One extended part has a protruding part extending even further in the axial direction toward the upstream side, and the other extended part has formed in an outer circumferential surface of a downstream-side end part thereof a recessed part that corresponds to the protruding part.
    Type: Application
    Filed: October 28, 2015
    Publication date: November 16, 2017
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Kohei OZAKI, Hidekazu UEHARA, Shin NISHIMOTO
  • Publication number: 20170298468
    Abstract: A method for manufacturing a shaft body by welding a plurality of shaft members together and forming the shaft body, the method including: a primary tempering step of subjecting a range in at least one of the shaft members, which is in the vicinity of an end of another shaft member side adjacent thereto, to tempering before the shaft members are welded together so that a strength of an end side of a region thereof is lower than a strength at a side which is opposite to the end of the region thereof; a welding step of welding the shaft members together after the primary tempering step; and a secondary tempering step of tempering the vicinity of a weld part between the shaft members after the welding step.
    Type: Application
    Filed: October 9, 2015
    Publication date: October 19, 2017
    Inventors: Yuichi HIRAKAWA, Hiroaki FUKUSHIMA, Shin NISHIMOTO, Hiroyuki ENDO
  • Patent number: 9759091
    Abstract: A steam turbine of an opposed-current single-casing type has a high pressure turbine part and an intermediate-pressure turbine part housed in a single casing. A dummy ring partitions the high-pressure turbine part and the intermediate-pressure part, and a cooling steam supply path and a cooling steam discharge path are formed in the dummy ring in the radial direction. Extraction steam or discharge steam of the high-pressure turbine part, whose temperature is not less than that of the steam having passed through a first-stage stator blade, is supplied to the cooling steam supply path. The cooling steam is fed throughout the clearance to improve the cooling effect of the dummy ring and a turbine rotor. The cooling steam is then discharged through a cooling steam discharge path to a discharge steam pipe which supplies the steam to a subsequent steam turbine.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: September 12, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Junichi Ishiguro, Tatsuaki Fujikawa, Yoshinori Tanaka, Naoto Tochitani, Shin Nishimoto
  • 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