Vane compressor having an endless camming surface minimizing tor

Details Vane compressor having an endless camming surface minimizing tor Vane compressor having an endless camming surface minimizing tor

1982-10-19

1985-02-26

Vrablik, John J.

Rotary expansible chamber devices

Working chamber surface expressed mathematically

418259, F04C 1800

Patent

active

045015376

ABSTRACT:
A portion of the endless camming surface of the pump housing, which performs one cycle of suction, compression, and discharge of fluid in cooperation with the vanes and the rotor, includes an increasing radius portion and first through fourth decreasing radius portions successively arranged in the advancing direction of the vanes. These camming surface portions have such cam profiles that with movement of each vane, the amount of protrusion of the vane gradually increases along the increasing radius portion, and gradually decreases along the decreasing radius portions, the receding speed of the vane gradually increasing along the first and third decreasing radius portions, and gradually decreasing along the second and fourth decreasing radius portions. The cam profiles may preferably vary along quadratic curves. Preferably, the above one cycle performing portion further includes one or two constant radius portions located between the above five portions, along which the amount of protrusion of each vane is kept substantially constant with movement of the vane.

REFERENCES:
patent: 2352941 (1944-07-01), Curtis
patent: 2731919 (1956-01-01), Predergast
patent: 3717423 (1973-02-01), Pedersen
patent: 3917438 (1975-11-01), Glanvall

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