Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Annular groove or recess completely encircles rotation axis
Patent
1975-02-05
1976-08-10
Vrablik, John J.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Annular groove or recess completely encircles rotation axis
418 82, 418269, F01C 2100, F03C 300, F04C 1500
Patent
active
039738817
ABSTRACT:
A vane-pump or motor which includes a rotor equipped with vanes slidable within at least approximately radial slots and with an endless cam surface which surrounds the rotor and together with the same forms a sickle-shaped working space; the cam surface is so shaped that it includes a radially outwardly directed inclination with respect to a circular cam concentric to the center of rotation of the rotor which forms the suction area and in other circumferential areas, it includes a radially inwardly directed inclination, forming the discharge area; two base plates are provided which axially sealingly enclose the rotor together with the vanes and the cam ring and which axially delimit the working space or spaces; internal channels connect the suction or inlet area of the working space with the feed line and the discharge area of the working space with the discharge channel; an unobstructed working medium supply is also provided out of the channel subjected to the higher pressure level which leads to the slot bottoms of the rotor disposed in the suction or inlet area by way of flooding channels while a throttled working medium discharge exists out of the slot bottoms of the vanes disposed in the discharge area which leads to the high pressure side of the installation by way of emptying channels, which includes at least in part a by-pass by way of at least some of the slot bottoms disposed in the suction or inlet area while the flooding channels to these slot bottoms terminate in the slot bottoms in an axial location disposed downstream with respect to the connecting place of the discharge channels as viewed in the flow direction of the working medium discharge.
REFERENCES:
patent: 2255786 (1941-09-01), Kendrick
patent: 3447477 (1969-06-01), Pettibone
patent: 3598510 (1971-08-01), Aoki
Daimler-Benz Aktiengesellschaft
Vrablik John J.
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