Axial sealing mechanism for a scroll type compressor

F - Mech Eng,Light,Heat,Weapons – 04 – C

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F04C 18/04 (2006.01) F04C 18/02 (2006.01) F04C 27/00 (2006.01) F04C 23/00 (2006.01)

Patent

CA 1323865

AXIAL SEALING MECHANISM FOR A SCROLL TYPE COMPRESSOR ABSTRACT OF THE DISCLOSURE This invention discloses an axial sealing mechanism for axially seal- ing 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 mem- ber and the fixed scroll define an intermediate chamber in which the orbit- ing scroll is disposed. The intermediate chamber is divided into a first and second chamber by an end plate of the orbiting scroll. A first conduit, which is 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. A 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 compres- sor, the second chamber is maintained at an intermediate pressure without pressure fluctuation due to the presence of the 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 mech- anism and the rotation preventing mechanism.

597625

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