Title:
MULTI-STAGE FLUID MACHINE
Document Type and Number:
Japanese Patent JP2005330878
Kind Code:
A
Abstract:
To provide a multi-stage pump which obtains high efficiency in other discharge area than a partial discharge area and excellent H-Q characteristics in the partial discharge area.
The rear edges 35b of a plurality of return guide vanes 35 are positioned further at the outside in a radial direction of a rotary shaft 19 than the front edge of a vane 36 of an impeller 20. A straightening vane 37 extending in the return flow path 32 from the rear edge 35b of the return guide vane 35 toward the rotary shaft 19 is situated at a part of a plurality of the return guide vanes 35.
Inventors:
WADA AKIHIRO
HARA TAKASHI
KANEMOTO TOSHIAKI
MIYANO MASAFUMI
HARA TAKASHI
KANEMOTO TOSHIAKI
MIYANO MASAFUMI
Application Number:
JP2004149381A
Publication Date:
December 02, 2005
Filing Date:
May 19, 2004
Export Citation:
Assignee:
TORISHIMA PUMP MFG CO LTD
International Classes:
F04D1/06; F04D29/44; (IPC1-7): F04D1/06; F04D29/44
Domestic Patent References:
| JP142414C | ||||
| JPS5771797U | 1982-05-01 | |||
| JPS59200089A | 1984-11-13 | |||
| JPH07293478A | 1995-11-07 |
Attorney, Agent or Firm:
Aoyama Aoi
Yasumichi Furukawa
Atsushi Maeda
Yoshiyuki Maebori
Yasumichi Furukawa
Atsushi Maeda
Yoshiyuki Maebori
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