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Title:
FLUID COMPRESSOR
Document Type and Number:
Japanese Patent JP2005140066
Kind Code:
A
Abstract:

To provide a fluid compressor sufficiently securing oil supply quantity with inexpensive structure and having excellent reliability.

The fluid compressor 1 has a rotary shaft 300 having a compression mechanism part 2 and an oil passage 311, an electric motor 600, bearings 401, 803, and a centrifugal pump part 900 for supplying oil through the oil passage 311. The rotary shaft 300 integrally has a main shaft part 302, a crank pin 301 eccentrically provided on the main shaft part 302, and an auxiliary bearing support part 303 of a small diameter of the main shaft part 302. The oil passage 311 has a first oil passage 311a extending from a lower end of the auxiliary bearing support part 303 to a lower part of the main shaft part 302, and a second oil passage 311b communicating with the first oil passage 311a and extending to an upper end of the crank pin 301. A plurality of the second oil passages 311b with passage parts having a diameter smaller than the first oil passage 311a and positioned outward, are formed in a plane range of the crank pin 311.


Inventors:
OTAWARA MASARU
NOZAWA SHIGEKAZU
MATSUNAGA MUTSUNORI
NAKAMURA SATOSHI
HASEGAWA SHUJI
TSUCHIYA TAKESHI
YANASE YUICHI
YASUNORI TOSHINORI
YOSUKE YOSHINOBU
Application Number:
JP2003379436A
Publication Date:
June 02, 2005
Filing Date:
November 10, 2003
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
F04B17/00; F04B35/04; F04B39/02; F04C18/02; F04C23/00; F04C29/02; (IPC1-7): F04C18/02; F04B39/02; F04C29/02
Attorney, Agent or Firm:
Katsuo Ogawa
Kyosuke Tanaka
Takashi Sasaki



 
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