Patents Assigned to Mitsubishi Heavy Industries Compressor Corporation
  • PIPING STRUCTURE AND COMPRESSOR SYSTEM
    Publication number: 20220268500
    Abstract: A compressor system includes a first pipe including a first pipe main body that forms a flow path therein and a first flange that projects from the first pipe main body to an outer peripheral side, and a second pipe including a second pipe main body that forms a flow path therein and a second flange that projects from the second pipe main body to an outer peripheral side and faces the first flange, a bellows provided so as to surround an entire circumference between the first flange and the second flange, and an excitation force reducing portion provided to separate the flow path and the bellows in a space between the first flange and the second flange and formed of a stretchable porous material.
    Type: Application
    Filed: January 12, 2022
    Publication date: August 25, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Hiroyuki Miyata, Masahiro Kobayashi, Masayuki Fujii
  • COMPRESSOR
    Publication number: 20220268292
    Abstract: A compressor has a rotor. The rotor includes a plurality of impellers that include a disk having a solid structure having a buried center, and are adjacent to each other in an axial direction, and a plurality of bolts for fixing the plurality of impellers together. The disk has a disk surface facing the axial direction and a bolt hole penetrating the disk at a position deviated outward from an axis in a radial direction. The disk surface includes a contact surface of which at least a part is located outside the bolt hole in the radial direction, and a non-contact surface which is a region inside the contact surface in the radial direction.
    Type: Application
    Filed: January 14, 2022
    Publication date: August 25, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Hideki Nagao
  • STEAM TURBINE
    Publication number: 20220268176
    Abstract: A steam turbine includes a rotor that rotates about an axis, a casing that covers the rotor from an outer side in a radial direction with respect to the axis, and a cover disposed outside the casing to form a hollow path portion between an outer peripheral surface of the casing and the cover, in which the cover is connected to a negative pressure source configured to put the path portion into a vacuum state, and the path portion is a space isolated from a space inside the casing.
    Type: Application
    Filed: February 17, 2022
    Publication date: August 25, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Tomoyuki Nishikawa
  • Rotary machine
    Patent number: 11421700
    Abstract: A rotary machine includes a plurality of shafts that extend in an axial direction, in which an axis extends, around the axis, are disposed such that at least parts of positions in the axial direction of the plurality of shafts overlap each other, and are rotatable relative to each other around the axis; a plurality of seal members that are disposed at intervals in the axial direction to seal gaps between the plurality of shafts in a radial direction with respect to the axis; and a seal gas supply unit configured to supply a seal gas from outside to a space surrounded by the plurality of shafts and the plurality of seal members.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: August 23, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Hiroyuki Miyata, Masahiro Kobayashi
  • GAS EXPANDER
    Publication number: 20220260088
    Abstract: A gas expander includes a scroll casing, an impeller accommodated in the scroll casing and rotationally driven to a first side in a circumferential direction around a central axis by the gas flowing while expanding from an outside to an inside in a radial direction, a diffuser disposed on a first side in an axial direction with respect to the scroll casing and forming a flow path of the gas discharged from the impeller to the first side in the axial direction and swirling to the first side in the circumferential direction, and a vortex preventer provided in the diffuser, in which the vortex preventer includes a profile rectifying blade portion, which is curved or inclined to a second side in the circumferential direction from the first side toward a second side in the axial direction, at least in a portion of the second side in the axial direction.
    Type: Application
    Filed: February 1, 2022
    Publication date: August 18, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Fumihiko Iwata
  • Valve device and steam turbine
    Patent number: 11415018
    Abstract: A valve device includes a valve casing 21, an intermediate rod portion 29, and an intermediate actuator unit 30. In the valve casing 21, a rod insertion hole into which the intermediate rod portion 29 can be inserted is formed. The intermediate actuator unit 30 includes a hydraulic cylinder that causes a piston rod portion to advance and retreat in a direction orthogonal to a second center axis direction D2. The hydraulic cylinder includes a rod guide portion that guides movement of the piston rod portion. A gap between an inner circumferential surface of the rod insertion hole and an outer circumferential surface of the intermediate rod portion 29 is formed to be wider than a gap between an inner circumferential surface of the rod guide portion and an outer circumferential surface of the piston rod portion.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: August 16, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Kenichi Nishiyama
  • Oil console equipment, rotary machine provided with oil console equipment, and method for recovering lubrication oil contained in exhaust gas
    Patent number: 11415022
    Abstract: Oil console equipment includes: a lubrication oil tank in which a lubrication oil is stored; a lubrication oil supply line which is connected to the lubrication oil tank and through which a liquid lubrication oil stored in the lubrication oil tank is supplied to a bearing supporting a rotor; a first cooler which is provided in the lubrication oil supply line and cools the liquid lubrication oil supplied to the bearing; a lubrication oil recovery line which is connected to the lubrication oil tank and through which the lubrication oil recovered from the bearing is introduced into the lubrication oil tank; a first atmosphere discharge pipe which is connected to the lubrication oil tank and through which a lubrication oil mist which exists in a gas phase in the lubrication oil tank and is a misted lubrication oil and a first exhaust gas containing a gas are introduced out.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: August 16, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Takuya Watanabe, Yusuke Kato, Tomoaki Takeda
  • VARIABLE-SPEED ACCELERATOR AND A METHOD FOR STARTING VARIABLE-SPEED ACCELERATOR
    Publication number: 20220252139
    Abstract: The variable-speed accelerator includes an electric device, a transmission device, and a power supply portion that supplies electric power of a constant rated frequency supplied from a power supply to the electric device when the electric device is started. The electric device includes a constant-speed electric motor that rotates a constant-speed input shaft of the transmission device, and a variable-speed electric motor that functions as a generator in a generator mode and also functions as an electric motor in an electric motor mode. When starting the electric device, the power supply portion supplies the electric power generated by the variable-speed electric motor in the generator mode to the constant-speed electric motor after supplying starting power to the constant-speed electric motor and the variable-speed electric motor.
    Type: Application
    Filed: January 19, 2022
    Publication date: August 11, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Yoshiyuki Okamoto, Masahiro Kobayashi, Hiroyuki Miyata
  • COMPRESSOR, COMPRESSOR ASSEMBLY, AND METHOD OF ASSEMBLING COMPRESSOR
    Publication number: 20220243738
    Abstract: A compressor includes: a casing that is formed in a cylindrical shape and has an opening portion that makes an inside and an outside of the casing communicate with each other at a lower portion in a vertical direction; a bundle that is accommodated inside the casing in a state of being insertable and removable in the axial direction; a first roller that is disposed at an end portion of a lower portion of the bundle and comes into contact with an inner peripheral surface of a lower portion of the casing; and a second roller that is disposed at the lower portion of the bundle at an interval from the first roller, and comes into contact with the inner peripheral surface of the lower portion of the casing.
    Type: Application
    Filed: January 26, 2022
    Publication date: August 4, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Hiroaki Oka, Jun Koyanagi
  • GEARED COMPRESSOR AND METHOD OF DESIGNING GEARED COMPRESSOR
    Publication number: 20220243736
    Abstract: A geared compressor includes a plurality of compression units and a compression-unit-driving mechanism which drives the plurality of compression units. The compression-unit-driving mechanism includes a plurality of driven gears which are provided in respective rotation shafts of the plurality of compression units and a plurality of large-diameter gears which are directly or indirectly driven by a drive source and have outer diameters larger than those of the plurality of driven gears. The plurality of large-diameter gears is arranged side by side in a horizontal direction and each of the plurality of large-diameter gears meshes with two or more of the plurality of driven gears.
    Type: Application
    Filed: January 11, 2022
    Publication date: August 4, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Hiroyuki Miyata, Masahiro Kobayashi
  • Metal laminating and modeling method
    Patent number: 11400536
    Abstract: In a metal laminating and modeling method, a three-dimensional modeled object 10 having a main surface 12 and an outer circumferential surface 13 is modeled by sequentially laminating a plurality of metal layers 11m. The metal laminating and modeling method has a metal layer formation step of forming the metal layers 11m by forming a plurality of weld beads 100 so as to be arranged in a horizontal direction on a table 2, and a first end portion weld bead formation step of inclining the table 2 such that a target surface 2f faces in a first inclination direction and forming first end portion weld beads 100a so as to overlap, among a plurality of center weld beads 100c, the center weld beads 100c located at an uppermost end in a vertical direction Dv.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: August 2, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Yasunori Sakai
  • Steam turbine and construction method of steam turbine
    Patent number: 11401888
    Abstract: A steam turbine 1 includes a turbine body 11 which includes a rotor 5 which is configured to rotate around an axis Ac, and a casing 6 which covers the rotor 5 to form a flow path through which steam flows in an axis Ac direction, together with the rotor 5, a thermal insulation member 12 which is provided to be in contact with an outer surface of the casing 6 in a high-pressure side region 61 out of the high-pressure side region 61 and a low-pressure side region 62 of the steam in the axis Ac direction of the casing 6, and a soundproof cover 13 which covers the low-pressure side region 62 out of the high-pressure side region 61 and the low-pressure side region 62 via a space between the outer surface of the casing 6 and the soundproof cover 13.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: August 2, 2022
    Assignees: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION, SANYU INDUSTRIES CO., LTD.
    Inventors: Akito Kunimoto, Keita Mori
  • Impeller and centrifugal compressor
    Patent number: 11401944
    Abstract: The impeller includes a disc having a main surface extending outward in a radial direction toward one side in an axial direction, a plurality of blades defining a flow path extending to an outlet on one side from an inlet on the other side in the axial direction, and a cover disposed to cover the plurality of blades. At least one of an inlet side region and an outlet side region which are a connection portion between the blade and the main surface and a connection portion between the blade and the cover has a small fillet portion curved in an arc shape and having a small radius of curvature. An intermediate region formed between the inlet side region and the outlet side region has a large fillet portion having a large radius of curvature.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: August 2, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Shuichi Yamashita, Miku Kuroda, Hiroaki Oka
  • Seal gas supply control method, seal gas supply control apparatus, and rotary machine
    Patent number: 11391292
    Abstract: A seal gas supply control method according to the present invention comprises a step for detecting a pressure difference between an internal pressure of a rotary machine and a supply pressure of a seal gas with respect to a dry gas seal portion, a step for adjusting an opening degree of a seal gas supply valve on the basis of the detected pressure difference between the internal pressure and the supply pressure, and a step for detecting a vent pressure for discharging the seal gas evacuated from the dry gas seal portion to the outside. The seal gas supply control method fully opens the seal gas supply valve when the detected vent pressure satisfies a predetermined condition.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: July 19, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Masaki Shakuda, Masahiro Hayashi
  • ACCUMULATOR AND LUBRICANT SUPPLY SYSTEM
    Publication number: 20220221103
    Abstract: An accumulator includes a tank body having a communication port that communicates the lubricant accommodating space capable of accommodating lubricant with the outside, the tank body extending around an axis, a piston that moves in the axial direction in the tank body to vary the size of the lubricant accommodating space, a spiral spring mechanism having a spiral spring, and a rotational force transmission member that converts a linear movement of the piston into a rotational force around the axis to transmit the converted rotational force. The rotational force transmission member converts a rotational movement due to a restoring force of the spiral spring into a force in the axial direction to move the piston in the axial direction.
    Type: Application
    Filed: December 28, 2021
    Publication date: July 14, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Kensei Shimamoto, Takuya Watanabe
  • Steam turbine and method of manufacturing steam turbine
    Patent number: 11384652
    Abstract: A steam turbine includes a casing which is dividable and of which both ends are open, and a bundle accommodated in the casing. The bundle includes a rotor, a plurality of diaphragms which can be divided, a bundle casing to which the diaphragm is fixed inside thereof, and a bearing portion fixed to an inside of the bundle casing on an outside of the diaphragm, and a seal portion fixed to the inside of the bundle casing between the diaphragm and the bearing portion. The bundle casing can be attached and detached to and from the casing in a state of holding the rotor, the diaphragm, the bearing portion, and the seal portion.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: July 12, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Yuichi Sasaki
  • Centrifugal compressor
    Patent number: 11378096
    Abstract: A centrifugal compressor includes: an impeller fixed on an outer periphery of a rotary shaft; a diffuser disposed at a radially outer side of the impeller; a casing accommodating the impeller and the diffuser; a scroll flow passage connected to an outlet of the diffuser, the scroll flow passage being formed into a scroll shape by a scroll inner peripheral wall and a scroll outer peripheral wall positioned at a radially outer side of the scroll inner peripheral wall; and a discharge pipe connected to the casing so as to form a discharge flow passage for guiding a fluid from the scroll flow passage to outside of the casing. The scroll inner peripheral wall is positioned at an inner side, in a radial direction, of the outlet of the diffuser, and the discharge pipe includes an inner wall surface which has a radially inner region.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: July 5, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Shuichi Yamashita, Jo Masutani, Yoshiaki Shoji
  • Centrifugal compressor and seal unit
    Patent number: 11371512
    Abstract: A centrifugal compressor includes a housing 20 having a facing surface 22f facing the outer peripheral surface of a cover 43, a seal member 50 forming a clearance with the outer peripheral surface of the cover 43, an inclined hole 55 formed in the seal member 50, extending at an angle to the side opposite to a direction of rotation, and having an opening portion 57 opening at a position facing the outer peripheral surface of the cover 43, a first fin 52 provided on the seal member 50 and protruding toward the outer peripheral surface of the cover 43, and a communication flow path portion 64 formed in the housing 20, having an introduction port 66i opening at a position facing the outer peripheral surface of the cover 43, and communicating with the inclined hole 55.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: June 28, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Masaki Shakuda, Shinichiro Tokuyama
  • Method and device for performing additive manufacturing while rotating a spindle
    Patent number: 11364544
    Abstract: An additive manufacturing method includes forming a shaped body by repeating: a material feeding step of forming a powder layer by feeding a shaping material that includes a metal powder onto a base that is provided outside a spindle in a radial direction thereof while rotating the spindle provided to be rotatable about a center axis; and a beam irradiating step of solidifying the shaping material by irradiating a prescribed area of the powder layer with a beam.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: June 21, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Kosei Kawahara
  • VALVE DEVICE AND STEAM TURBINE
    Publication number: 20220186630
    Abstract: The valve device includes: a valve casing that includes a valve casing main body, in which an inlet flow path, an intermediate flow path, and an outlet flow path are formed, and a lid portion that closes an external opening portion formed in the valve casing main body; an intermediate valve seat portion that is detachable from the valve casing main body; a strainer that extends in a direction connecting the lid portion and the intermediate valve seat portion and is disposed between the lid portion and the intermediate valve seat portion; and an energizing member that is disposed between the strainer and the intermediate valve seat portion and is energized the intermediate valve seat portion toward the valve casing main body. The strainer is disposed with the energizing member pressed toward the valve casing main body.
    Type: Application
    Filed: November 16, 2021
    Publication date: June 16, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Kenichi Nishiyama, Yuki Okamoto