发明授权
- 专利标题： Centrifugal compressor having an asymmetric self-recirculating casing treatment
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申请号： US13578188申请日： 2011-02-03
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公开(公告)号： US09816522B2公开(公告)日： 2017-11-14
- 发明人: Xinqian Zheng , Yun Lin , Yangjun Zhang , Mingyang Yang , Takahiro Bamba , Hideaki Tamaki
- 申请人： Xinqian Zheng , Yun Lin , Yangjun Zhang , Mingyang Yang , Takahiro Bamba , Hideaki Tamaki
- 申请人地址： JP Tokyo CN Beijing
- 专利权人： IHI CORPORATION,TSINGHUA UNIVERSITY
- 当前专利权人： IHI CORPORATION,TSINGHUA UNIVERSITY
- 当前专利权人地址： JP Tokyo CN Beijing
- 代理机构： Griffin and Szipl PC
- 优先权： CN201010110299 20100209; CN201010110311 20100209
- 国际申请： PCT/JP2011/052274 WO 20110203
- 国际公布： WO2011/099419 WO 20110818
- 主分类号： F04D17/16
- IPC分类号： F04D17/16 ; F04D29/42 ; F04D29/68
摘要：
A centrifugal compressor has a casing 7. In the casing 7 is formed a back-flow channel 9 to return fluid from a downstream position of an impeller full blade leading edge 6a to an upstream position of the impeller full blade leading edge 6a. The back-flow channel 9 includes a suction ring groove 9a and a back-flow ring groove 9b. The suction ring groove opens at the downstream position on the inner face 7a of the casing 7, and extends in the circumferential direction. The back-flow ring groove opens at the upstream position on the inner face 7a, and extends in the circumferential direction. Distribution in the circumferential direction of the axial-direction position of the suction ring groove 9a or a width of the suction ring groove 9a is asymmetric with reference to the rotation axis.