Title:
HYDRAULIC SCREW COMPRESSOR
Document Type and Number:
Japanese Patent JP2019065707
Kind Code:
A
Abstract:
To prevent a seal member of a lip seal from being abnormally worn or burnt even in a case where a pressure difference between the inside and the outside is considerable in an oil-cooled screw compressor adopting the lip seal.SOLUTION: The present invention relates to an oil-cooled screw compressor comprising a shaft seal. A shaft seal 5 comprises a lip seal including at least two or more seal lips of which the distal end is directed towards the inside in an axial line direction of a drive shaft and which are brought into slide-contact with an outer periphery of the drive shaft. The seal lips are included in such a manner that at least one or more oil supply spaces 55 formed between the adjacent seal lips are included. A storage part for a lubricant of an oil separator and the oil supply space are communicated via oil supply piping. In a rotor chamber inside of a compressor body, a space of a relatively low pressure with respect to a pressure of a space inside a casing in which the shaft seal is provided, and the oil supply space are communicated via pressure regulation piping.SELECTED DRAWING: Figure 1
Inventors:
HOTTA KOJI
Application Number:
JP2017188240A
Publication Date:
April 25, 2019
Filing Date:
September 28, 2017
Export Citation:
Assignee:
HOKUETSU KOGYO CO
International Classes:
F04C27/00; F04C18/16; F16J15/3204; F16J15/324; F16J15/3268
Attorney, Agent or Firm:
Kokura Patent Office