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公开(公告)号：US11378096B2
公开(公告)日：2022-07-05
申请号：US17049161
申请日：2019-02-27
发明人： Shuichi Yamashita , Jo Masutani , Yoshiaki Shoji
摘要： 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.
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公开(公告)号：US20210190078A1
公开(公告)日：2021-06-24
申请号：US16757534
申请日：2018-11-29
摘要： A multi-stage centrifugal compressor includes: a rotary shaft that is configured to rotate around an axis; a plurality of stages of impellers that are fixed to the rotary shaft and are configured to integrally rotate to compress and deliver a fluid, which flows into the impellers from an upstream side in an axial direction, to a radial outer side; a casing including a return flow path that is configured to guide the fluid, which is compressed and delivered from an impeller on a preceding stage side, toward a radial inner side, and an introduction flow path that is connected to a downstream side of the return flow path and is configured to divert the fluid and introduce the fluid to an impeller on a succeeding stage side; and return vanes that are arranged in the return flow path while being spaced apart from each other in a circumferential direction.
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公开(公告)号：US20200309150A1
公开(公告)日：2020-10-01
申请号：US16822470
申请日：2020-03-18
摘要： A compressor includes a rotation shaft that is capable of rotating around a main axis, an impeller provided integrally with the rotation shaft, a casing that covers the impeller from an outer circumferential side and forms a flow path through which a working fluid circulates, a discharge scroll that is provided at an end of the flow path on a downstream side and extends in a spiral shape around the main axis, a discharge nozzle that communicates with the discharge scroll on the downstream side and extends from the discharge scroll in a tangent direction around the main axis, and a pressure loss body that has a plate shape extending in a direction orthogonal to an axis of the discharge nozzle extending in a radial direction orthogonal to the main axis and is capable of blocking a part of a flow path cross-section of the discharge nozzle.
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公开(公告)号：US20200248709A1
公开(公告)日：2020-08-06
申请号：US16780161
申请日：2020-02-03
发明人： Jo Masutani , Shuichi Yamashita
摘要： What is provided is a method of manufacturing a centrifugal rotary machine including: a fixing step S1 of fixing a return vane body having a virtual airfoil curved forward in a rotation direction of a rotation shaft as it goes inward in a radial direction and formed by a pressure surface recessed forward in the rotation direction and a negative pressure surface protruding forward in the rotation direction onto a guide flow path; and a cutting step S2 of forming a cut surface by cutting a portion including an inner radial end portion of the return vane body from the pressure surface to the negative pressure surface.
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公开(公告)号：US20220145898A1
公开(公告)日：2022-05-12
申请号：US17497407
申请日：2021-10-08
发明人： Nobuyori Yagi , Noriyuki Okada , Chihiro Myoren , Akihiro Nakaniwa , Shuichi Yamashita , Jo Masutani , Hirofumi Higuchi , Takashi Oda
摘要： The impeller of a rotating machine according to at least one embodiment of the present discloser is provided with: a disc; a cover disposed on an opposite side of a radial passage from the disc in an axial direction; and a blade disposed between the disc and the cover. In a dimensionless position along a camber line of the blade when the position of a leading edge of the blade is defined as 0 and the position of a trailing edge of the blade is defined as 1, a position where an angle difference between a first blade angle at a disc-side end portion of the blade and a second blade angle at a cover-side end portion of the blade is maximum is in a range of 0.5 or more and 1 or less. The first blade angle is −10 degrees or more and 0 degrees or less at the position where the angle difference is maximum.
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公开(公告)号：US11047393B1
公开(公告)日：2021-06-29
申请号：US16757534
申请日：2018-11-29
摘要： A multi-stage centrifugal compressor includes: a rotary shaft that is configured to rotate around an axis; a plurality of stages of impellers that are fixed to the rotary shaft and are configured to integrally rotate to compress and deliver a fluid, which flows into the impellers from an upstream side in an axial direction, to a radial outer side; a casing including a return flow path that is configured to guide the fluid, which is compressed and delivered from an impeller on a preceding stage side, toward a radial inner side, and an introduction flow path that is connected to a downstream side of the return flow path and is configured to divert the fluid and introduce the fluid to an impeller on a succeeding stage side; and return vanes that are arranged in the return flow path while being spaced apart from each other in a circumferential direction.
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公开(公告)号：US20190078583A1
公开(公告)日：2019-03-14
申请号：US16083412
申请日：2017-03-15
IPC分类号： F04D29/30
摘要： An impeller includes: a disc having a disc shape; a plurality of blades formed on a surface facing a first side in an axial direction of the disc; and a cover surrounding the plurality of blades. The cover includes: an inner circumferential surface connected to the blades with a diameter decreasing from the second side toward a first side in the axial direction; and a distal end surface extending from an end portion of the inner circumferential surface on the first side in the axial direction toward the outside in a radial direction and facing the first side in the axial direction. A front edge portion extends from a boundary between the inner circumferential surface and the distal end surface toward the inside in the radial direction.
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公开(公告)号：US20190055947A1
公开(公告)日：2019-02-21
申请号：US16079319
申请日：2017-02-28
发明人： Shuichi Yamashita
摘要： The centrifugal compressor includes an impeller configured to feed a fluid suctioned from one side to an outside in a radial direction by rotating about an axis, and a flow path provided between the impellers adjacent to each other in the direction of an axis and configured to guide the fluid discharged from an impeller on the upstream side to an impeller on the downstream side. The flow path includes a diffuser flow path, a return bend portion, and a guide flow path. Further, the centrifugal compressor further includes return vanes extending across the return bend portion and the guide flow path in the flow path and provided in intervals in a circumferential direction, and the radial positions of the leading edges of the return vanes in the flow paths adjacent in the direction of the axis are different from each other.
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公开(公告)号：US20210301831A1
公开(公告)日：2021-09-30
申请号：US17189660
申请日：2021-03-02
发明人： Shuichi Yamashita , Miku Kuroda , Hiroaki Oka
摘要： 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.
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公开(公告)号：US10989201B2
公开(公告)日：2021-04-27
申请号：US16088352
申请日：2017-03-23
摘要： A centrifugal compressor includes: a rotating shaft; a first impeller; a second impeller which is disposed on a downstream side of the first impeller; a return flow path which guides a first fluid flowing to a radially outer side from the first impeller toward a radially inner side; an introduction flow path which introduces the fluid guided to the radially inner side to the second impeller; an intermediate suction flow path which additionally supplies a second fluid to the second impeller; and a curved flow path which is connected to a downstream side of the introduction flow path and the intermediate suction flow path, and guides the first fluid and the second fluid to the second impeller, wherein a side surface on an upstream side of the introduction flow path is disposed on the downstream side from a return position of the return flow path.
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