Oil flooded screw compressor with thrust compensation control

Details Oil flooded screw compressor with thrust compensation control Oil flooded screw compressor with thrust compensation control

1991-03-12

1992-08-04

Bertsch, Richard A.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

418203, F04C 1816, F04C 2910

Patent

active

051353741

ABSTRACT:
An oil flooded screw compressor wherein a thrust force acting upon a bearing is controlled within a fixed range to prevent possible damage to the bearing. The oil-cooled screw compressor comprises a pair of meshing screw rotors, a balance piston mounted for axial movement in parallel to axes of the screw rotors for causing, when operated, a force to act upon one of the screw rotors in a direction from the sucking side to the discharging side, and a slide valve for adjusting the volume of the screw compressor. A flow path of pressure fluid is provided for operating the balance piston and and is controlled such that it is opened when the slide valve is positioned on the full load side with respect to a preset position, but is closed when the slide valve is positioned at any other position.

REFERENCES:
patent: 3314597 (1967-04-01), Schibbye
patent: 3432089 (1969-03-01), Schibbye
patent: 3811805 (1974-05-01), Moody, Jr. et al.
patent: 4119392 (1978-10-01), Breckheimer
patent: 4519748 (1985-05-01), Murphy et al.
patent: 4609329 (1986-09-01), Pillis et al.
patent: 4909716 (1990-03-01), Orosz et al.
patent: 4964790 (1990-10-01), Scott

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