Title:
CENTRIFUGAL COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2014/054440
Kind Code:
A1
Abstract:
In order to reduce leakage from the seal part of a centrifugal compressor and to improve the damping characteristic at the seal part, this centrifugal compressor is equipped with: a casing; a rotor which is held in this casing in a rotatable manner and to which an impeller is attached; and a labyrinth seal which is attached to the casing and is arranged opposing the rotor. A gas is compressed as the impeller rotates. The labyrinth seal is provided on at least the intake part of the final-stage of the impeller or a balance piston that balances the thrust of the rotor. The diameter of the rotor opposing the labyrinth seal increases or decreases in a stepwise manner. Furthermore, the labyrinth seal is formed from multiple grooves in the axial direction, and multiple pockets are formed in the circumferential direction in each groove.
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| JP2002544428 | [Title of the Invention] Regenerative pump type machine |
| WO/1987/004223 | CENTRIFUGAL SEAL |
Inventors:
MIURA HARUO (JP)
TAKAHASHI NAOHIKO (JP)
NARITA MITSUHIRO (JP)
TAKAHASHI NAOHIKO (JP)
NARITA MITSUHIRO (JP)
Application Number:
PCT/JP2013/075497
Publication Date:
April 10, 2014
Filing Date:
September 20, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
F04D29/10; F01D11/02; F04D17/12; F04D29/16; F16J15/447
Domestic Patent References:
| WO2011122092A1 | 2011-10-06 |
Foreign References:
| JP2010007611A | 2010-01-14 | |||
| JP2012072736A | 2012-04-12 | |||
| JP2008190487A | 2008-08-21 | |||
| JP2002228014A | 2002-08-14 | |||
| JPH08505462A | 1996-06-11 | |||
| JPH1113688A | 1999-01-19 |
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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