Rotor for hydraulic pump or motor

Details Rotor for hydraulic pump or motor Rotor for hydraulic pump or motor

1977-02-03

1978-08-08

Vrablik, John J.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Grooved working member surface

418 80, 418 81, F01C 2100, F03C 300

Patent

active

041053761

ABSTRACT:
A hydraulic vane-type pump or motor comprising a housing and a stator defining a rotor chamber, and a rotor for rotation in said chamber on a shaft extending axially through said housing. To prevent gouging of the walls of the rotor chamber by the sharp peripheral edges of the rotor, the rotor sidewalls are ground or offset in the area of the peripheral edges to provide sufficient clearance between the rotor sidewalls and the chamber walls. The rotor is offset to a lesser depth beginning at a point radially inwardly from the outer peripheral edge toward the center thereof to minimize excessive oil leakage normally associated with rotors which are milled to prevent gouging.

REFERENCES:
patent: 2642802 (1953-06-01), Gardiner
patent: 2820417 (1958-01-01), Adams et al.

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