Axial actuator for unloading an orbital scroll type fluid materi

Details Axial actuator for unloading an orbital scroll type fluid materi Axial actuator for unloading an orbital scroll type fluid materi

1993-06-02

1994-08-30

Bertsch, Richard A.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 57, 418 14, F01C 102

Patent

active

053421868

ABSTRACT:
A scroll type fluid displacement machine (10) with a housing (12) a fluid inlet port (78) and a fluid outlet port (76) has an annular piston (88) that biases the balls (90) of the ball coupler and the orbital scroll (29) toward the fixed scroll (18) to move the axial tips (40 and 58) of the wraps (34 and 52) into sealing contact with the end plates (30 and 48) when fluid is pumped into the annular chamber (120). A control system (28) is provided to control the axial position of the orbital scroll (20). The control system (28) includes a solenoid valve (176) which directs fluid from a small trigger compressor (174) to the annular chamber (120) to axially move the orbital scroll (20) into sealing contact with the fixed scroll (18). The solenoid valve (176) also directs fluid from the exhaust chamber (42) to the annular chamber (120) to maintain the orbital scroll (20) in sealing contact with the fixed scroll (18). The solenoid valve (176) also directs fluid from the annular chamber (120) to the sump (232) to stop fluid compression by the scrolls (18 and 20).

REFERENCES:
patent: 3884599 (1975-05-01), Young et al.
patent: 4575318 (1986-03-01), Blain
patent: 4610610 (1986-09-01), Blain
patent: 4877382 (1989-10-01), Caillat et al.
patent: 4927339 (1990-05-01), Riffe et al.
patent: 4990072 (1991-02-01), Guttinger

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