Optimum porting configuration for a slipper seal pump

Details Optimum porting configuration for a slipper seal pump Optimum porting configuration for a slipper seal pump

1974-11-04

1978-03-21

Vrablik, John J.

Rotary expansible chamber devices

Positively actuated vane

Spring biased

F01C 100, F04C 100

Patent

active

040801241

ABSTRACT:
A slipper vane seal pump has a porting plate and pumping chamber combination having optimum slipper seal porting configuration so that in a typical ten slipper pump the spacing from the end of the constant tangent arc to the opening of the inlet port is nominally ten degrees or approximately one times the slipper arcuate surface interface to the cam bore. Further, the end of the inlet port termination point matched with the arcuate contour of the pumping bore wall assures that each slipper will return to its corresponding driving slot before the inlet port openings are terminated when one full slipper arcuate width enters the constant working arc. The inlet port is extended from 25.degree., assuming a zero degree datum, to 76.degree., thereby providing a lengthened arc. There is thus provided an arrangement which negates explosive turbulence effects at the crossover point outlet-to-inlet, as well as improved noise and high speed durability characteristics for high pressure pumps having increased performance specifications.

REFERENCES:
patent: RE27241 (1971-12-01), Pace et al.
patent: 3424094 (1969-01-01), Clark et al.
patent: 3781145 (1973-12-01), Wilcox
patent: 3785758 (1974-01-01), Adams et al.
patent: 3797977 (1974-03-01), Carlson

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