Axial sealing mechanism for a scroll type compressor

Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll

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418 57, F04C 1804

Patent

active

050824325

ABSTRACT:
This invention discloses an axial sealing mechanism for axially sealing an orbiting scroll and a fixed scroll of a scroll type compressor. The compressor includes a driving mechanism for driving the orbiting scroll in an orbital motion and a block member fixedly attached to the housing of the scroll compressor to support the driving mechanism. The block member and the fixed scroll define an intermediate chamber in which the orbiting scroll is disposed. The intermediate chamber is divided into a first and second chamber by an end plate of the orbiting scroll. At least one first conduit sized to produce a pressure throttling effect, links the second chamber and the discharge chamber of the compressor to increase the pressure in the intermediate chamber. At least one second conduit, which also is sized to produce a pressure throttling effect, links the second chamber to the suction chamber of the compressor. During operation of the compressor, the second chamber is maintained at an intermediate pressure without pressure fluctuation due to the presence of the at least one first and second conduits. This intermediate pressure provides a constant urging force against the orbiting scroll to urge it against the fixed scroll to obtain a good axial seal between both scrolls without decreasing the durability of the driving mechanism and the rotation preventing mechanism or the life of the compressor.

REFERENCES:
patent: 3884599 (1975-05-01), Young et al.
patent: 4332535 (1982-06-01), Terauchi et al.
patent: 4475874 (1984-10-01), Sato
patent: 4527963 (1985-07-01), Terauchi
patent: 4538975 (1985-09-01), Tsukagoshi
patent: 4596520 (1986-06-01), Arata et al.

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