Title:
SCREW COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2019/044390
Kind Code:
A1
Abstract:
This screw compressor comprises a screw rotor, a casing, and a liquid supply unit (38) that supplies a liquid in film form into a compression chamber formed in the casing. The screw rotor has a male rotor and a female rotor. Formed on the inner surface of the casing are a male-side bore (9) that covers the male rotor and a female-side bore (10) that covers the female rotor. A high-pressure-side line of intersection between the male-side bore (9) and the female-side bore (10) is designated as a compression-side cusp (12). In an expanded view of the bores, the first point of intersection between an extended line (31) of a female-side addendum line (27) and a male-side addendum line (26) moves with the rotation of the male rotor and female rotor, and the locus formed by this movement is designated as a locus line (32). In this case, the position of the opening of the liquid supply unit (38) in the compression chamber is between the compression-side cusp (12) and the locus line (32). The liquid supplied from outside of the screw compressor into the compression chamber through the liquid supply unit is thereby sufficiently brought to atomization in a shorter distance from the liquid supply unit.
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Inventors:
CHIBA KOTARO (JP)
TAKANO MASAHIKO (JP)
YORIKANE SHIGEYUKI (JP)
MORITA KENJI (JP)
TAKEUCHI YOSHITAKA (JP)
KANADA MINAKO (JP)
TAKANO MASAHIKO (JP)
YORIKANE SHIGEYUKI (JP)
MORITA KENJI (JP)
TAKEUCHI YOSHITAKA (JP)
KANADA MINAKO (JP)
Application Number:
PCT/JP2018/029337
Publication Date:
March 07, 2019
Filing Date:
August 06, 2018
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
F04C18/16; F04C29/02; F04C29/04
Foreign References:
| JPS4519671B1 | 1970-07-04 | |||
| JP2003184768A | 2003-07-03 | |||
| JPS588288A | 1983-01-18 | |||
| JP2015078623A | 2015-04-23 | |||
| US5653585A | 1997-08-05 | |||
| JP2003184768A | 2003-07-03 | |||
| JP2017067011A | 2017-04-06 | |||
| EP3134649A2 | 2017-03-01 |
Other References:
"Methode zur stochastischen Optimierung von Schraubenrotorprofilen", 2003, Dortmund, XP055622874
See also references of EP 3680485A4
See also references of EP 3680485A4
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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