Variable displacement compressor

Details Variable displacement compressor Variable displacement compressor

1999-03-26

2000-12-12

Freay, Charles G.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417270, 137 50, F04B 126

Patent

active

061589705

ABSTRACT:
A variable displacement compressor that decreases displacement to reduce compression load without imbalancing the rotation of the drive shaft when the rotating speed of the compressor's drive shaft exceeds a predetermined limit value. The compressor includes a pressurizing passage connecting a crank chamber to a discharge chamber. A rotated guide rotates integrally with the drive shaft. The pressurizing passage is opened and closed by a valve body. Orbiting balls, which contact the valve body, are arranged about the axis of the drive shaft and the rotated guide. The balls follow the rotation of the rotated guide and orbit about the axis. The orbiting radius of the balls varies. A spring urges the balls in a direction decreasing the orbiting radius of the balls. When the rotating speed of the drive shaft exceeds the limit value, centrifugal force moves the balls against the force of the spring and increases the orbiting diameter of the balls. This moves the valve body and increases the size of the pressurizing passage.

REFERENCES:
patent: 4872814 (1989-10-01), Skinner et al.
patent: 5547346 (1996-08-01), Kanzaki et al.
patent: 6010314 (2000-01-01), Kobayashi et al.
patent: 6015269 (2000-01-01), Ota et al.
patent: 6056513 (2000-05-01), Kawaguchi et al.

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