Scroll type fluid compressor unit with axial end surface sealing

Details Scroll type fluid compressor unit with axial end surface sealing Scroll type fluid compressor unit with axial end surface sealing

1981-09-30

1984-03-20

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418142, 277 81P, 277 815, 277 961, 277204, F04C 1802, F04C 2700, F16J 1516

Patent

active

044378203

ABSTRACT:
In a scroll type fluid compressor having an orbiting scroll member and a fixed scroll member which form at least one pair of outer fluid pockets and a central pocket therebetween for fluid compression, the axial end surfaces of each spiral element of the scroll members have a groove along the spiral curve. At least one closed portion is located along the groove to block fluid flow in the groove. A seal element is loosely fitted in the groove. During operation the compressed fluid flows into the groove to urge the seal element against the end plate of the opposite scroll member so that the axial sealing between the spiral element and the end plate is assured without leakage of fluid along the groove. Also, the closed portion is located along the spiral element at the location where the line contact point where the outer fluid pockets and the central pocket merge to prevent back pressure changes from causing excessive wear of the seal element.

REFERENCES:
patent: 801182 (1905-10-01), Creux
patent: 3924977 (1975-12-01), McCullough
patent: 3994633 (1976-11-01), Shaffer
patent: 3994635 (1976-11-01), McCullough
patent: 3994636 (1976-11-01), McCullough et al.
patent: 4199308 (1980-04-01), McCullough

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