Valve in particular a proportional pressure relief valve

摘要

A valve, in particular, a proportional pressure relief valve, includes an electrically controlled solenoid system (10) for the control of an operating part (12, 12a). The operating part cooperates with a valve element (26) extending longitudinally inside a valve housing (24) to release a fluid transport connection path between a fluid inlet (32) and a fluid outlet (34) in its open position and to block the through path in its closed position. An energy store, preferably in the form of a compression spring (58), is arranged between the operating part (12, 12a) and valve element (26) in a free gap between the two and tends to hold the valve element (26) in the direction of its closed position. The operating piece (12a) is embodied as a guide piston having a longitudinal guide for the valve element (26).

主权项

1. A valve, comprising:
an electrically actuatable solenoid system having an actuating part with movable guide piston, said guide piston having an outer guide and an inner guide; a valve housing having a longitudinal axis and having a fluid inlet and a fluid outlet connected by a fluid conveying connection path through said housing, said fluid inlet having a surrounding contact surface, an inside periphery of said housing engaging and guiding said outer guide during longitudinal movement of said guide piston in said housing, a space inside said housing about said guide piston and on a side of said guide piston remote from the said fluid inlet and said fluid outlet and out of fluid communication with said fluid inlet and said fluid outlet; a valve element actuatable by said actuating part and movable within said housing along said longitudinal axis between an open position opening said fluid conveying connection path from said inlet to said outlet and a closed position blocking said fluid conveying connection path, a guided part of said valve element slidably received and engaged in said inner guide, said valve element having a closing cone ending in a conically extending point on a side thereof facing said fluid inlet; a transverse hole extending through said guide piston providing fluid communication between said inner guide and said space and being spaced from said guided part; a first compression spring located laterally between said inner guide and said inside periphery of said housing and extending axially between and engaging a contact surface of said guide piston and a first contact surface of said valve element at any distance therebetween and biasing said valve element to the closed position engaging said contact surface of said housing; and a second compression spring extending axially between a side of said valve element remote from said first compression spring and an inside surface of said valve housing adjacent said fluid inlet.