Scroll-type fluid machine having a sealed back pressure chamber

Details Scroll-type fluid machine having a sealed back pressure chamber Scroll-type fluid machine having a sealed back pressure chamber

1994-04-06

1995-09-05

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 554, 418 555, 418 57, 418149, 418179, F01C 104, F01C 1900

Patent

active

054474183

ABSTRACT:
A scroll-type fluid machine in which the high-pressure chamber side (36) of a back pressure chamber (6a) using a fixed scroll (11) made of an aluminum base material can be fully sealed. The fixed scroll (11) is made of an aluminum base material, and a discharge cover (2) is made of a ferrous material. Between the U seals (35) interposed between the high-pressure chamber (36) side of the back pressure chamber (6a) and the low-pressure side, at least the U seal (35a) on the high-pressure chamber (36) side is made of glass-reinforced polytetrafluoroethylene resin, and is installed so as to be pressed against the fixed scroll (11). The U seal withstands a high temperature and large pressure difference and is installed so that the sliding mating part of the U seal (35a) is not the fixed scroll (11) made of an aluminum base material which is easily worn, but the discharge cover (2) made of a ferrous material which is less prone to wear.

REFERENCES:
patent: 4438936 (1984-03-01), Schlegel
patent: 4580790 (1986-04-01), Doose
patent: 5257920 (1993-11-01), Takeda

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