Centrifugal compressor having an asymmetric self-recirculating casing treatment

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United States of America Patent

PATENT NO 10273973
APP PUB NO 20120321440A1
SERIAL NO

13578163

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Abstract

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A centrifugal compressor includes an asymmetric self-recirculating casing treatment that includes, on an inner face of a casing 10, a suction ring groove 1, a ring guide channel 2 and a back-flow ring groove 3 to form a self-recirculating channel. An axial distance Sr from an upstream end face of the suction ring groove 1 to an impeller full blade leading edge 4 or a width br of the suction ring groove 1 is represented as A·sin(α+θ0)+A0 and is distributed in a sinusoidal shape in a circumferential direction, an initial phase angle θ0 is in a range of 0°≤θ0≤360°, and a circumferential angle α of the casing 10 has a definition range of θ0≤α≤θ0+360°. In the expression, A denotes amplitude of distribution of the axial distance Sr or the width br, and A0 denotes an average of the axial distance Sr or the width br.

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Patent Owner(s)

Patent OwnerAddress
TSINGHUA UNIVERSITY100084 TSINGHUA YUAN BEIJING HAIDIAN DISTRICT BEIJING CITY BEIJING CITY 100084
IHI CORPORATIONTOKYO 135-8710

International Classification(s)

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  • 2011 Application Filing Year
  • F04D Class
  • 829 Applications Filed
  • 694 Patents Issued To-Date
  • 83.72 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances201120122013201420152016201720182019202020212022202320240255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bamba, Takahiro Tokyo, JP 15 66
Lin, Yun Beijing, CN 119 2554
Tamaki, Hideaki Tokyo, JP 8 42
Yang, Mingyang Beijing, CN 10 42
Zhang, Yangjun Beijing, CN 9 34
Zheng, Xinqian Beijing, CN 6 30

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  • 3 Citation Count
  • F04D Class
  • 47.28 % this patent is cited more than
  • 6 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges139153201 - 1011 - 200102030405060708090100110120130140150160170

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