Variable capacity vane compressor having an improved bearing arr

Details Variable capacity vane compressor having an improved bearing arr Variable capacity vane compressor having an improved bearing arr

1992-05-07

1993-08-31

Bertsch, Richard A.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

417DIG1, F04B 4900

Patent

active

052403874

ABSTRACT:
A variable capacity vane compressor includes a bearing arrangement having a radial bearing radially supporting a drive shaft of the compressor, and a thrust bearing rotatably supporting a capacity control element. The bearing arrangement comprises an annular member fixed in a through hole formed through a side block of the compressor, through which the drive shaft extends. The annular member has an inner peripheral surface in which the radial and thrust bearings are received. The annular member is formed of a material having a coefficient of thermal expansion substantially equal to that of a material forming the radial bearing. The thrust bearing has a first race disposed on a side thereof close to a rotor of the compressor, and a second race disposed on a side remote from the rotor. The first race is force-fitted in a through hole formed through the capacity control element and slidably fitted in the inner peripheral surface of the annular member. The first and second races have respective inner peripheral surfaces thereof spaced from an outer peripheral surface of the drive shaft.

REFERENCES:
patent: 4473309 (1984-09-01), Box
patent: 4573809 (1986-03-01), Jacob
patent: 4772139 (1988-09-01), Betton
patent: 4809833 (1989-03-01), Brunhen et al.
patent: 5028152 (1991-07-01), Hill et al.
patent: 5044908 (1991-09-01), Kawade

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