Control section for a control system for controlling the interna

Details Control section for a control system for controlling the interna Control section for a control system for controlling the interna

1988-10-07

1990-06-12

Smith, Leonard E.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417310, 417440, 251 28, 251 31, F04B 4902, F16K 3112

Patent

active

049328441

ABSTRACT:
For controlling the internal volume of a rotary compressor (5), adjustable valve bodies (3) are used on the outlet side. External control means, often of an extremely complicated nature, have previously been used to control the internal volume in the rotary compressor. By allowing the different pressure levels of the rotary compressor (5) to directly influence a control section (1), the position of the valve body (3) can be controlled by an operating section (2). In the control section (1) an intermediate pressure (9) from the compressor is balanced against a pressure from the high-pressure side (19) of the compressor by a plunger (6) having different diameters. The position of the plunger (6) then determines the control of the internal volume by the position of the valve body (3) connected to the operating section (2).

REFERENCES:
patent: 3578025 (1971-05-01), Furrer
patent: 3936239 (1976-02-01), Shaw
patent: 4080110 (1978-03-01), Szymaszek

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