Vane compressor with means for obtaining sufficient back pressur

Details Vane compressor with means for obtaining sufficient back pressur Vane compressor with means for obtaining sufficient back pressur

1984-10-31

1985-09-24

Gluck, Richard E.

Rotary expansible chamber devices

Positively actuated vane

Fluid biased

F04C 1800, F04C 2910

Patent

active

045430497

ABSTRACT:
Front and rear radial roller bearings are provided in front and rear side blocks of the pump housing. A partition wall member is secured to an end face of the rear side block remote from the rotor to define a sealing chamber therebetween. The sealing chamber communicates with a back pressure chamber in the rotor through the rear radial roller bearing. A shaft-seal chamber defined between the front head and the front side block communicates with the back pressure chamber through the front radial roller bearing. The pump housing is formed therein with passage means communicating the discharge pressure chamber with at least one of the sealing chamber and the shaft-seal chamber. The passage means has valve means arranged therein, which is operable to open when the difference in pressure between the discharge pressure chamber and the back pressure chamber is below a predetermined value and to close when the pressure difference is above the latter, to thereby establish and interrupt communication between the discharge pressure chamber and at least one of the sealing chamber and the shaft-seal chamber.

REFERENCES:
patent: 3086475 (1963-04-01), Rosaen
patent: 3762843 (1973-10-01), Suzuki et al.
patent: 4248575 (1981-02-01), Watanabe et al.
patent: 4447196 (1984-05-01), Nagasaku et al.
patent: 4484868 (1984-11-01), Shibuya et al.

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