Roller gerotor device and pressure balancing arrangement therefo

Details Roller gerotor device and pressure balancing arrangement therefo Roller gerotor device and pressure balancing arrangement therefo

1994-09-15

1995-11-14

Vrablik, John J.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

418 79, 418 80, 418 81, 418132, 418171, F01C 1113, F01C 2100

Patent

active

054661374

ABSTRACT:
A roller gerotor device is disclosed including an outer rotor (39) and an inner rotor (31), and a plurality of rollers (37) serving as teeth. The device includes a housing means (11,45,47) defining a first wear surface (67) disposed axially adjacent first axial end surfaces (55,63) of the rotors. The first wear surface cooperates with one of the rotors to define an annular fluid passage (83) and a plurality of fluid grooves communicating with the passage (83) and extending radially outward. At least a terminal portion of each of the grooves (87) is adjacent an axial end surface (59) of each roller member (37) as the rotors rotate. Each of the terminal portions (95) becomes progressively shallower in the direction of rotation of the rotors, thus building up fluid pressure in the fluid groove (87) to prevent gouging or galling of the roller end surface against the adjacent wear surface (67).

REFERENCES:
patent: 3303793 (1967-02-01), Morita
patent: 3623929 (1971-11-01), Shaw et al.
patent: 3869228 (1975-03-01), Swedberg
patent: 4411607 (1983-10-01), Wusthof et al.
patent: 5104303 (1992-04-01), Mori et al.
patent: 5354188 (1994-10-01), Arbogast et al.

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