Compressors

Details Compressors Compressors

1977-08-30

1979-05-08

Vrablik, John J.

Rotary expansible chamber devices

Multistage

Interengaging rotary members

418 15, 418 95, 418104, 418201, F04C 1712, F04C 2300, F04C 2700, F04C 2900

Patent

active

041533950

ABSTRACT:
In screw compressors for fluids there is normally leakage of fluid axially through the rotor-shaft bearing assemblies at the high-pressure end of the casing housing the interacting rotors. To obviate or mitigate the resulting inefficiency in the operation of the compressor, and also reduce atmosphere pollution arising from the leakage, a fluid coupling is provided between said bearing assemblies and an additional fluid inlet opening in the compressor casing, said additional opening being positioned to communicate with a land of the rotor when the rotor is at or beyond rotor cut-off, so that fluid leaking from the compression chamber is recirculated to the compression chamber.

REFERENCES:
patent: 3178104 (1965-04-01), Williams et al.
patent: 3265293 (1966-08-01), Schibbye
patent: 3307453 (1967-03-01), Nilsson et al.
patent: 3918854 (1975-11-01), Denis
patent: 3975123 (1976-08-01), Schibbye

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