Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1989-02-28
1990-09-25
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 94, 418188, 418DIG1, F04C 1804, F04C 2902
Patent
active
049589911
ABSTRACT:
An oil separating mechanism of a hermetically sealed scroll type compressor in which an inner chamber of a housing is kept at discharge pressure is disclosed. The compressor includes a drive shaft supported by a plain bearing in an inner block member. The drive shaft is operatively linked to an orbiting scroll which orbits within a stationary scroll. The drive shaft includes an axial bore extending from an open and termination within the inner block member. A radial bore is provided near the terminal end of the axial bore and links the axial bore to a discharge chamber of the compressor. A helical groove is formed on the exterior surface of the supported portion of the drive shaft. The helical groove is linked to the axial bore through a radial hole formed through the supported portion of the drive shaft. The open end of the axial bore is isolatedly linked to the outlet of the compressor such that refrigerant gas flowing from the discharge chamber to the outlet must flow through the radial bores and axial bore of the drive shaft. Therefore, lubricating oil mixed within the refrigerant gas as a mist is retained at the radial bores and does not flow out of the compressor with the refrigerant gas, increasing the efficiency of the external cooling circuit.
REFERENCES:
patent: 2420124 (1947-05-01), Coulson
patent: 3317123 (1967-05-01), Funke
patent: 4365941 (1982-12-01), Tojo et al.
patent: 4496293 (1985-01-01), Nakamura et al.
patent: 4547138 (1985-10-01), Mabe et al.
patent: 4552518 (1985-11-01), Utter
patent: 4561832 (1985-12-01), Shimizu
patent: 4666381 (1987-05-01), Butterworth
Sanden Corporation
Vrablik John J.
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