Electropneumatic pilot control stage for a pneumatic servo valve

Details Electropneumatic pilot control stage for a pneumatic servo valve Electropneumatic pilot control stage for a pneumatic servo valve

1983-06-07

1985-09-03

Camby, John J.

Fluid handling

Systems

Multi-way valve unit

251 65, 25112915, F16K 3112, F16K 3102

Patent

active

045386439

ABSTRACT:
Electropneumatic pilot or anticipatory control stage for a pneumatic servo valve includes a nozzle impact plate system, with an impact plate (9,23) controlled by a plunger coil (7) by the input of electric signals. Openings (58,61,62) are arranged in a diaphragm spring disk (10) serving as carrier element for the plunger coil (7), as well as in the front flange (65) of the coil body (8), these openings (58,61,62) guide a flow of air (64) passing through a measuring nozzle (22) of the valve main stage (2) into the pilot control state (1) through a magnetic gap or space (66,67) about the plunger coil (7) and conduct the air into the atmosphere via exhaust ducts (63). By means of the work medium inherent to the servo valve, a permanent cooling of the plunger coil (7) is effected. The automatic control valve affords miniaturization and the improvement of the valve dynamics for better integration in pneumatic drives.

REFERENCES:
patent: 2521854 (1970-07-01), Leiber et al.
patent: 3021866 (1962-02-01), Handley
patent: 3457956 (1969-07-01), Andrews

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