Variable displacement vane compressor

Details Variable displacement vane compressor Variable displacement vane compressor

1988-07-28

1989-07-04

Freeh, William L.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

417310, F04B 4900, F04C 2908

Patent

active

048447030

ABSTRACT:
A variable displacement vane compressor for an air conditioning system having at least one crescent chamber (R1, R2) defined by vanes (8), a rotor (6), and a bore of a cylindrical body (3). The cooling capacity is adjusted by rotational displacement of an annular plate member (21) for controlling the amount of refrigerant introduced into the crescent chamber (R1, R2). The annular plate member (21) is rotated by a spool (25) driven by a dynamic pressure balance between a first compartment (S1) to which a refrigerant gas under a discharging pressure is introduced, and of a second compartment (S2) to which an oil under a discharging pressure is introduced. The spool (25) is connected to the annular plate member (21) through a pin (26) penetrating an arcuate slot 27 formed in a front end wall plate member (4). A sealing means (35a, 36) for preventing the leakage of the refrigerant gas from the high pressure region including the first compartment (S 1) to the low pressure region is provided between the annular plate member (21) and the front end wall member (4). A pressurized oil is supplied to the sealing means (35a, 36) through an intermediate passage (37) to enhance the sealing effect of the sealing means (35a, 36). The intermediate passage (37) is separated from the arcuate slot (27) to prevent the high pressure oil from leaking into the first compartment (S1).

REFERENCES:
patent: 4060343 (1977-11-01), Newton
patent: 4065229 (1977-12-01), Black
patent: 4137018 (1979-01-01), Brucken
patent: 4726740 (1988-02-01), Suzuki et al.
patent: 4744732 (1988-05-01), Nakajima et al.

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