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公开(公告)号：US11073020B2
公开(公告)日：2021-07-27
申请号：US14671081
申请日：2015-03-27
Inventor： Nobuyori Yagi , Daisuke Hirata
Abstract: An impeller includes a disk section having a tube section with a grip section which is fixed by thermal deformation to a rotary shaft that is configured to rotate around an axis line, and a main disk body, which is on another end in an axial direction from the grip section and which extends outward in a radial direction of the rotary shaft; and blade sections that protrude from the main disk body in the axial direction. The disk section has a hoop stress-limiting section with a tube section which extends further towards the other end in the axial direction than the main disk body.
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公开(公告)号：US20200300253A1
公开(公告)日：2020-09-24
申请号：US16089067
申请日：2017-03-02
Inventor： Shin Yanagisawa , Akihiro Nakaniwa , Eiichi Yanagisawa , Kazutoshi Yoko , Daisuke Hirata , Takanori Matsueda
Abstract: A rotary machine includes: a casing; a rotor that includes a rotatable rotary shaft located inside the casing, and a plurality of stages of impellers fixed to an outer periphery of the rotary shaft; a diaphragm group including diaphragms that are respectively provided in the plurality of stages of the impellers; gas flow paths provided respectively corresponding to the impellers and through which process gas to be compressed flows; and a discharge volute connected to the gas flow paths. The discharge volute is provided to expand inward in an axis line direction of the casing.
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公开(公告)号：US20190249675A1
公开(公告)日：2019-08-15
申请号：US16242214
申请日：2019-01-08
Inventor： Toshio Mizunoue , Takanori Matsueda , Daisuke Hirata
CPC classification number: F04D17/122 , F01D25/24 , F01D25/243 , F04D29/083 , F04D29/403 , F04D29/4206 , F04D29/624 , F05B2240/14 , F05B2260/301
Abstract: A rotary machine includes a first flange in which a first hole portion is formed, a second flange disposed to face the first flange via an abutting surface and having a second hole portion formed therein, and a stud bolt inserted into a first hole portion and a second hole portion and fastened to a female screw of the second hole portion, wherein the thickness of the second flange is larger than the thickness of the first flange.
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公开(公告)号：US11603858B2
公开(公告)日：2023-03-14
申请号：US17155426
申请日：2021-01-22
Inventor： Takashi Oda , Daisuke Hirata
Abstract: A method for manufacturing a compressor includes a step of installing a bundle having an O-ring on an outer peripheral surface inside a lower half casing so that a position of the O-ring in an axial direction coincides with a position of a lower half relief groove, a step of installing an upper half casing having an upper half relief groove on the lower half casing so that a position of the upper half relief groove in the axial direction coincides with the position of the O-ring, and a step of pressing the bundle in the axial direction to move the O-ring to a position away from the lower half relief groove and the upper half relief groove, and bringing the O-ring into contact with the inner peripheral surface of the lower half casing and the inner peripheral surface of the upper half casing.
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公开(公告)号：US11143205B2
公开(公告)日：2021-10-12
申请号：US16775701
申请日：2020-01-29
Inventor： Takashi Oda , Daisuke Hirata
Abstract: A compressor 1 includes a base 10 that is fixed on a foundation F and supports a compressor main body 20 from below in a vertical direction Dv, and a connecting part that detachably connects the compressor main body 20 and the base 10 to each other. The compressor main body 20 includes a suction-side protruding pipe 28A and a discharge-side protruding pipe 28B that communicate between an inside and an outside of a casing 21 and protrude outward from an outer peripheral surface of the casing 21. The base 10 includes a support base 11 having a support surface 11f for supporting a lower part of the casing 21, and a suction port 12 that extends downward from the support base 11 in the vertical direction Dv and has a through-hole into which the suction-side protruding pipe 28A is inserted.
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Patent Agency Ranking
公开(公告)号：US11131319B2
公开(公告)日：2021-09-28
申请号：US16117673
申请日：2018-08-30
Inventor： Akihiro Nakaniwa , Akinori Tasaki , Daisuke Hirata
Abstract: A centrifugal compressor is provided with a plurality of diaphragms including a first diaphragm and a second diaphragm which are adjacent to each other in an axial direction, a casing disposed on a radially outer side of the plurality of diaphragms and accommodating an internal component including the plurality of diaphragms, at least one axial spacer disposed between the first diaphragm and the second diaphragm, and a scroll flow passage formed by a scroll inner peripheral wall and a scroll outer peripheral wall. The scroll inner peripheral wall is formed by a surface of the first diaphragm positioned on a radially inner side of an outer peripheral surface of the first diaphragm. At least a part of the scroll outer peripheral wall is formed by an inner peripheral surface of the casing.
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公开(公告)号：US20210131568A1
公开(公告)日：2021-05-06
申请号：US16487241
申请日：2018-02-22
Inventor： Akihiro Nakaniwa , Daisuke Hirata
IPC: F16J15/40
Abstract: A sealing device includes a ring part, a first fin group that together with a first outer peripheral surface forms a clearance, and a second fin group of which the front end is positioned farther radially inward than the first outer peripheral surface and which together with a second outer peripheral surface forms a clearance. The ring part has a first gas supply channel capable of supplying a first sealing gas to the first fin group, a second gas supply channel capable of supplying a second sealing gas to the second fin group, and a mixed gas discharge channel capable of discharging a mixed gas of the first sealing gas and the second sealing gas from between the first fin group and the second fin group.
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公开(公告)号：US20190063457A1
公开(公告)日：2019-02-28
申请号：US16117673
申请日：2018-08-30
Inventor： Akihiro Nakaniwa , Akinori Tasaki , Daisuke Hirata
Abstract: A centrifugal compressor is provided with a plurality of diaphragms including a first diaphragm and a second diaphragm which are adjacent to each other in an axial direction, a casing disposed on a radially outer side of the plurality of diaphragms and accommodating an internal component including the plurality of diaphragms, at least one axial spacer disposed between the first diaphragm and the second diaphragm, and a scroll flow passage formed by a scroll inner peripheral wall and a scroll outer peripheral wall. The scroll inner peripheral wall is formed by a surface of the first diaphragm positioned on a radially inner side of an outer peripheral surface of the first diaphragm. At least a part of the scroll outer peripheral wall is formed by an inner peripheral surface of the casing.
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公开(公告)号：US20210246906A1
公开(公告)日：2021-08-12
申请号：US17155426
申请日：2021-01-22
Inventor： Takashi Oda , Daisuke Hirata
Abstract: A method for manufacturing a compressor includes a step of installing a bundle having an O-ring on an outer peripheral surface inside a lower half casing so that a position of the O-ring in an axial direction coincides with a position of a lower half relief groove, a step of installing an upper half casing having an upper half relief groove on the lower half casing so that a position of the upper half relief groove in the axial direction coincides with the position of the O-ring, and a step of pressing the bundle in the axial direction to move the O-ring to a position away from the lower half relief groove and the upper half relief groove, and bringing the O-ring into contact with the inner peripheral surface of the lower half casing and the inner peripheral surface of the upper half casing.
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公开(公告)号：US20190048877A1
公开(公告)日：2019-02-14
申请号：US16077162
申请日：2016-12-08
Inventor： Kazutoshi Yoko , Shin Yanagisawa , Eiichi Yanagisawa , Akihiro Nakaniwa , Daisuke Hirata , Takanori Matsueda
Abstract: A centrifugal compressor according to the present invention includes, as gas flow paths, diffuser flow paths into which process gas flowing from impellers to outside in a radial direction flows, curved flow paths that respectively communicate with the diffuser flow paths and change a flowing direction of the process gas from a direction toward the outside in the radial direction to a direction toward inside in the radial direction, and return flow paths that respectively communicate with the curved flow paths and cause the process gas flowing through the curved flow paths to flow into the impellers. In the present invention, the curved flow path configuring at least one of the gas flow paths is provided between a diaphragm and a flow path forming body that is provided between the diaphragm and the casing.
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