Title:
オイルフリーロータリコンプレッサのロータ軸シール装置
Document Type and Number:
Japanese Patent JP5046379
Kind Code:
B2
Abstract:
A rotor shaft sealing method for an oil-free rotary compressor is provided, with which occurrence of lubrication oil intrusion into the compression chamber of the compressor which is liable to occur when negative pressure is produced in the compression chamber, is prevented. With a rotor shaft sealing structure composed such that two shaft seal means (20,31) are provided in the rotor casing (1) between the oil lubricated bearing (10, 10') and the compression chamber (9) such that an annular airspace (24) is formed between the two shaft seal means (20,31), at least one communicating hole (34,34') is provided to communicate the annular airspace (24) to the outside of the rotor casing (1), and the annular airspace (24) of the male rotor shaft (6) sealing part and the annular airspace (24) of the female rotor shaft (7) sealing part are connected by a between-rotor shaft communication passage (35), pressurized air is supplied to the annular airspaces(24) by which lubrication oil intrusion into the compression chamber(9) is prevented.
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Inventors:
Hideyuki Kimura
Masato Muto
Masato Muto
Application Number:
JP2007095583A
Publication Date:
October 10, 2012
Filing Date:
March 30, 2007
Export Citation:
Assignee:
ANEST IWATA CORPORATION
International Classes:
F04C27/00; F04C18/16
Domestic Patent References:
| JP61065088A | ||||
| JP6001790U | ||||
| JP58084269A | ||||
| JP7317553A | ||||
| JP59110889A | ||||
| JP50030112A |
Foreign References:
| DE19544994A1 |
Attorney, Agent or Firm:
Patent business corporation Takahashi Matsumoto & Partners
Masahisa Takahashi
Hiroshi Matsumoto
Masahisa Takahashi
Hiroshi Matsumoto