Variable capacity vane compressor

Details Variable capacity vane compressor Variable capacity vane compressor

1988-05-20

1989-03-21

Freeh, William L.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

417310, F04B 4900, F04C 2908

Patent

active

048138541

ABSTRACT:
A variable capacity vane compressor has a cylinder within which a pair of compression spaces are defined between the cylinder and a rotor rotatably received within the cylinder at diametrically opposite locations, and a control element disposed in the cylinder for rotation about its own axis in circumferentially opposite directions in response to a difference between pressure from a lower pressure zone and pressure from a higher pressure zone. The control element has its outer peripheral edge formed with a pair of cut-out portions at substantially diametrically opposite locations, which each have a leading end in the direction of rotation of the rotor. The rotation of the control element causes a change in the circumferential position of each cut-out portion to thereby vary the timing of commencement of compression in the corresponding compression space and hence vary the compressor capacity. The leading ends of the cut-out portions are located at diametrically asymmetric locations to provide a difference in the timing of commencement of compression between the compression spaces. Therefore, the compressor as a whole is free from insufficient compression and can provide sufficient discharge pressure even when it assumes the minimum capacity position.

REFERENCES:
patent: 4726740 (1988-02-01), Suzuki et al.

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