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Title:
WATER INJECTION TYPE SCREW FLUID MACHINE
Document Type and Number:
Japanese Patent JP2012149631
Kind Code:
A
Abstract:

To provide a water lubrication type screw fluid machine having a long-life shaft sealing device.

The screw fluid machine 1 includes a first non-contact seal 16, a second non-contact seal 17 and a lip seal 18, between a rotor chamber 3 and a high pressure-side bearing 11 of a rotor shaft 7 of a screw rotor 4, in this order. The machine includes: a low pressure communicating channel 23 for allowing an outflow space 19 formed on the rotor chamber 3 side with respect to the first non-contact seal 16 to communicate with a low pressure channel 5 for the target gas communicating with a low pressure space 22 inside the rotor chamber 3 or the rotor chamber, a pressurized communicating channel 24 for introducing high-pressure target gas into a pressurized space 20 formed between the first and second non-contact seals 16 and 17, and open communicating channels 25 and 26 through which an open space 21 formed between the second non-contact seal 17 and the lip seal 18 opens to the outside of the casing 2.


Inventors:
YOSHIMURA SEIJI
NOGUCHI TORU
Application Number:
JP2011052868A
Publication Date:
August 09, 2012
Filing Date:
March 10, 2011
Export Citation:
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Assignee:
KOBE STEEL LTD
International Classes:
F04C18/16; F04C27/00; F04C29/02; F04C29/12
Domestic Patent References:
JP2009287413A2009-12-10
JPH10252901A1998-09-22
JPS62186073A1987-08-14
JPS56155162U1981-11-19
JPH08504915A1996-05-28
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Atsushi Maeda



 
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