Title:
OIL-FREE SCREW COMPRESSOR
Document Type and Number:
Japanese Patent JP2015169177
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an oil-free screw compressor in which a shaft seal device has superior assemblability and leakage of compressed gas from the shaft seal device can be reduced.SOLUTION: The oil-free screw compressor is provided in which: a pair of male and female screw rotors 16 meshed with each other are housed in a rotor chamber 15 of a compressor casing 12; the screw rotors are supported by a bearing 22 through a rotor shaft 21; and shaft seal devices 30, 40 is provided which are arranged in a shaft seal space 10 of a casing formed between a rotor chamber and the bearing and which seal the rotor shaft. The shaft seal devices comprise an oil seal 31 arranged at the bearing side, a packing case 41 arranged at the rotor chamber side, and a gas seal 42 for sealing against gas, and a seal ring is housed in a gas seal housing space 48 formed by fitting and fixing of the bearing-side end part 44 of the packing case and the rotor chamber-side end part 33 of the oil seal through close fit.
Inventors:
YANO NORIO
MIYATAKE TOSHIYUKI
MIYATAKE TOSHIYUKI
Application Number:
JP2014046598A
Publication Date:
September 28, 2015
Filing Date:
March 10, 2014
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
F04C18/16; F04C27/00; F04C29/00; F16J15/16; F16J15/18; F16J15/28; F16J15/34
Domestic Patent References:
| JPS61179460U | 1986-11-08 | |||
| JPH02124289U | 1990-10-12 | |||
| JPH0177169U | 1989-05-24 | |||
| JPS50354U | 1975-01-06 | |||
| JPH0266762U | 1990-05-21 | |||
| JPS6429690A | 1989-01-31 |
Foreign References:
| WO2012001829A1 | 2012-01-05 | |||
| US20130075975A1 | 2013-03-28 | |||
| US5014999A | 1991-05-14 |
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Yoshiyuki Maebori
Takuji Yamada
Yoshiyuki Maebori