ELEKTROPNEUMATISCHES SERVOVENTIL ZUR STEUERUNG EINES VOLUMENSTROMES BZW. EINES DRUCKES

摘要

Electropneumatic servo valve for controlling a volume current or a pressure, respectively. The subject matter of the invention relates to a two-stage, electropneumatic servo valve for controlling a volume current. The servo valve (1, 2) consists of an electromechanically controllable preliminary control stage (1), by means of which electric control signals are converted into pneumatic control pressure in a control air space (29) between the preliminary control stage (1) and a valve main stage (2) with a nozzle impact plate system (22, 9). The variably controllable control air pressure in the control air space (29) serves as actuating force for positioning a control piston (54) in the valve main stage (2), on the basis of which a proportional volume current can be adjusted at an operating output (A). The electropneumatic servo valve (1, 2) serves to convert electric control signals of low power for controlling a relatively large volume current for the operation of pneumatic drives.