Automatic switch-off system for hydraulic load with occurrence of leakage

摘要

The vol. flow measuring motors are respectively fixed to the endfaces of the valve housing. The shafts of the motors are mutually aligned and lie inside the valve housing. The shaft (1) of the measuring motor (9) transmits the shaft rotational movement on to a sliding sleeve movable axially on the shaft (1). The shaft (2) of the measuring motor (10) is connected with this sliding sleeve across a thread. The sliding sleeve moves axially with a sliding piston. The sliding piston with the valve housing forms a 5/4 way valve, provided with connections (P,T,A,B,H). The sliding sleeve following the unscrewing of the screwed connection: slider sleeve/thread rod, is held in a selected position by plates and springs. In the event of a leakage, the connection (H) is connected without pressure.