Variale capacity vane compressor

Details Variale capacity vane compressor Variale capacity vane compressor

1990-05-21

1991-06-04

Nilson, Robert G.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

417310, F04B 4900

Patent

active

050209760

ABSTRACT:
A variable capacity vane compressor has a cylinder including a plurality of vanes slidably fitted in respective vane slits formed in a rotor thereof. Vane back pressure chambers are defined within the vane slits by respective ones of the vanes. A control element is rotatably arranged in the cylinder for varying the compression starting timing and hence the capacity of the compressor. Back pressure compensation holes are formed through the control element and communicating with a high pressure zone having high pressure of the compressor. The back pressure compensation holes are communicatable with each of the vane back pressure chambers for introducing the high pressure within the high pressure zone into the each vane back pressure chamber when the control element is in a first position wherein the compression starting timing is most retarded. The back pressure compensation holes are disconnectable from the each vane back pressure chamber for inhibiting the high pressure within the high pressure zone from being introduced into the each vane back pressure chamber when the control element is in a second position wherein the compression starting timing is most advanced.

REFERENCES:
patent: 4929156 (1990-05-01), Eitai

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