Two-piece balance plate for gerotor motor

Details Two-piece balance plate for gerotor motor Two-piece balance plate for gerotor motor

1999-02-05

2000-07-11

Denion, Thomas

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

418135, 418 77, F03C 200

Patent

active

060863455

ABSTRACT:
A gerotor motor of the type having an end cap (13), and a stationary valve plate (15) disposed adjacent a rearward surface of the gerotor gear set (17). Adjacent a forward surface of the gerotor star (27) is a balancing plate assembly (19) including a radially outer balance plate (73) and a radially inner balance plate (75), the balance plates defining inner (77) and outer (79) profiles, respectively, which are closely spaced apart and are radially inward from the gerotor volume chambers (29) to provide sufficient sealing land. The inner balance plate (75) is biased toward the star end surface (81) by a Belleville washer (87). The end surface (81) of the gerotor star (27) defines individual star tooth surfaces (97), each of which includes a radial fluid passage (99) receiving system pressure, and a fluid passage (101) oriented generally perpendicular to the radial passage, and having a decreasing flow volume in a direction away from the radial passage (99). The fluid flowing through the perpendicular fluid passage (101) substantially reduces the tendency for galling to occur between the end surface of the star and the adjacent surface of the balance plate (75).

REFERENCES:
patent: 4715798 (1987-12-01), Bernstrom
patent: 4741681 (1988-05-01), Bernstrom
patent: 4976594 (1990-12-01), Bernstrom
patent: 5466137 (1995-11-01), Bierlein et al.
patent: 5516268 (1996-05-01), Kassen et al.
patent: 5593296 (1997-01-01), Bernstrom et al.
patent: 5624248 (1997-04-01), Kassen et al.

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