Scroll compressor having a compressor housing made up of a cup-l

Details Scroll compressor having a compressor housing made up of a cup-l Scroll compressor having a compressor housing made up of a cup-l

1995-07-10

1996-10-29

Freay, Charles G.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 551, 418 554, 418 88, 418 96, 418 98, 464104, F01C 104

Patent

active

055690289

ABSTRACT:
A scroll compressor includes a compressor housing made up of a cup-like first casing having a suction port defined therein and a cap-like second casing having a discharge port defined therein. The compressor housing accommodates a stationary scroll member having a stationary end plate and a stationary scroll wrap protruding axially from the stationary end plate, and an orbiting scroll member having an orbiting end plate and an orbiting scroll wrap protruding axially from the orbiting end plate, with the orbiting scroll wrap being in engagement with the stationary scroll wrap to define a plurality of working pockets therebetween. At least one shim is interposed between mating surfaces of the first and second casings to regulate axial gaps between axial end surfaces of the stationary and orbiting scroll wraps and the orbiting and stationary end plates opposed thereto. The stationary end plate is positioned in the proximity of the mating surfaces of the first and second casings so that a low-pressure chamber is defined between the stationary end plate and the first casing, while a high-pressure chamber is defined between the stationary end plate and the second casing. The location of the stationary end plate in the proximity of the mating surfaces of the first and second casings reduces a variation in the axial gaps referred to above.

REFERENCES:
patent: 4411604 (1983-10-01), Terauchi
patent: 4818198 (1989-04-01), Tamura
patent: 4861245 (1989-08-01), Tojo et al.
patent: 4917582 (1990-04-01), Fraser, Jr. et al.

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