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公开(公告)号：EP3421814A1
公开(公告)日：2019-01-02
申请号：EP17774624.5
申请日：2017-03-23
CPC分类号： F04D29/441 , F04D17/122 , F04D17/125 , F04D29/4206 , F04D29/4213
摘要： The present invention provides a centrifugal compressor (1) including: a first casing (19); a second casing (20) which is disposed on a downstream side of the first casing (19) and has an outer diameter larger than an outer diameter of the first casing; a first impeller (3a) which is disposed on a radially inner side of the first casing; a first return flow path (29a) which is disposed on a radially inner side of the first casing; a second impeller (3b) which is disposed on a radially inner side of the second casing and connected to a downstream side of the first return flow path (29a); an intermediate suction flow path (10) which is disposed on the radially inner side of the second casing and additionally supplies the fluid to a flow path between the first return flow path (29a) and the second impeller (3b); and a second return flow path (29b) which is disposed on the radially inner side of the second casing (20), wherein an outer diameter of the intermediate suction flow path (10) and an outer diameter of the second return flow path (29b) are larger than the outer diameter of the first casing (19).
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公开(公告)号：EP4001660A1
公开(公告)日：2022-05-25
申请号：EP21206286.3
申请日：2021-11-03
发明人： YAGI, Nobuyori , OKADA, Noriyuki , MYOREN, Chihiro , NAKANIWA, Akihiro , YAMASHITA, Shuichi , MASUTANI, Jo , HIGUCHI, Hirofumi , ODA, Takashi
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：EP3514392A1
公开(公告)日：2019-07-24
申请号：EP18754032.3
申请日：2018-02-19
发明人： MASUTANI, Jo , HIGUCHI, Hirofumi
摘要： A centrifugal compressor includes: an impeller that rotates about a main shaft 4; a return channel 63 that includes return vanes 64 for guiding a main stream of a fluid to be compressed by the impeller to the impeller from an outer side of the main shaft 4 in a radial direction toward an inner side in the radial direction, multi-stage compressor units 6 that are connected to a downstream side of the return channel 63 and that includes a first bent channel 61 for changing a direction of the main stream to a direction along the main shaft 4; and an intermediate suction channel 72 that is connected to the return channel 63 in at least one of the multi-stage compressor units 6 and that merges a suctioned fluid to the main stream. The intermediate suction channel 72 includes a chamber 721 that has a scroll shape, and inlet guide vanes (IGVs) 73 for guiding the suctioned fluid to the impeller. The IGVs 73 are integrated with the return vanes 64 in the connected return channel 63.
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公开(公告)号：EP3421814B1
公开(公告)日：2020-04-01
申请号：EP17774624.5
申请日：2017-03-23
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公开(公告)号：EP3587828A1
公开(公告)日：2020-01-01
申请号：EP18777375.9
申请日：2018-02-22
摘要： A suction-and-discharge flow path (30) includes a circumferential flow path (40) which extends in an arc shape about an axis (O) and an external communication path (50) which is connected to both ends of the circumferential flow path (40). The circumferential flow path (40) has a uniform flow path cross-sectional area in a circumferential direction, and a convex curved surface (64) having a convex curved surface shape is provided between an outer peripheral wall surface (42) of the circumferential flow path (40) and a second inner wall surface (52) of the external communication path (50). In a case where, when viewed in the axis (O) direction, a curvature radius of the convex curved surface (64) is defined as (R) and a radial dimension of the circumferential flow path (40) is defined as (W), a relationship of (W)≤ (R) ≤ (3W) is established.
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