Centrifugal turbomachinery

Details Centrifugal turbomachinery Centrifugal turbomachinery

2007-01-26

2011-12-13

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural rigidly related blade sets

C415S211200

Reexamination Certificate

active

08075260

ABSTRACT:
A centrifugal turbomachinery in accordance with the present invention can lower a fluid loss in a return flow path. In the centrifugal turbomachinery, a plurality of centrifugal impellers is attached to a rotating shaft, and the centrifugal turbomachinery is provided with a diffuser having a plurality of blades introducing a fluid boosted by a front stage impeller to a rear stage impeller, and a return flow path means. The return flow path means has a side plate arranged in a back surface side of the front stage impeller, a plate opposing the side plate and arranged in a front surface side of the rear stage impeller, and a plurality of blades arranged between the side plate and the plate so as to be spaced in a peripheral direction. A maximum diameter portion of the side plate is changed in the peripheral direction.

REFERENCES:
patent: 5344285 (1994-09-01), O'Sullivan et al.
patent: 6162015 (2000-12-01), Nagai et al.
patent: 7338255 (2008-03-01), Nabesaka et al.
patent: 11-324987 (1999-11-01), None
patent: 11324987 (1999-11-01), None
patent: 2005-282548 (2005-10-01), None
First Chinese Office Action mailed Aug. 29, 2008 and English translation thereof.
Second Chinese Office Action mailed Apr. 24, 2009 and English translation thereof.

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