Electropneumatic servo valve for controlling a volume current and pressure, respectively

US4524804A · kind A · utility

Assignee

• Kienzle Apparate GmbH · DE

Inventors

• Wolf-Dieter Goedecke · Unterkirnach, DE
• Gerhard Schneckenburger · Hüfingen, DE
• Reinhard Schwenzer · Aachen, DE

Key dates

• Filing date: May 2, 1983
• Grant date: Jun 25, 1985
• Expiry date: May 2, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86622
• WIPO field: Control
• WIPO sector: Instruments

Abstract

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.