Scroll fluid machine having a sealing member radially inwardly o

Details Scroll fluid machine having a sealing member radially inwardly o Scroll fluid machine having a sealing member radially inwardly o

1990-03-14

1991-12-03

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 554, 418143, F01C 104, F01C 1900

Patent

active

050696050

ABSTRACT:
A scroll fluid machine, such as a scroll vacuum pump or a scroll compressor, is disclosed and is capable of discharging substantially oil-free fluid. The scroll fluid machine comprises a casing, a drive shaft having an eccentric shaft portion, a scroll rotor supported on the eccentric portion of the drive shaft for revolution and having a scroll wrap, a scroll stator having a scroll wrap and attached to the open end of the casing with its scroll wrap in engagement with that of the scroll rotor to define a closed fluid compressing space together with the scroll wrap of the scroll rotor. Thrusts acting on the scroll rotor are sustained by thrust bearing portions formed in the end surface of the scroll stator, and an annular sealing member preformed of a flexible material in a U shape is disposed in a space defined between and by the scroll rotor and the scroll stator to isolate the closed fluid compressing space from the interior of the casing. Lubricating oil is splashed on the bearings and the scroll rotor to effect lubrication and cooling thereof.

REFERENCES:
patent: 3994633 (1976-11-01), Shaffer
patent: 4466784 (1984-08-01), Hiraga

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