Pulsator for hydraulic systems controlling actuating mechanisms - has hydraulic circuit with non-return valve connecting actuator with cavity under piston

摘要

The pulsator for hydraulic systems controlling actuating mechanisms has a housing accommodating a pusher made in the form of a piston with a rod. There is a delivery valve and a pneumatic piston displacing in the cavity connected to the pneumatic control system. Above the pusher piston there is an upper cavity communicating with a high-pressure main, and under the piston there is a lower cavity communicating with the actuating mechanism via a non-return valve. A stem is provided between the rod and the piston. Also made above the pusher piston is an auxiliary cavity which is an extension of the upper cavity, defined by a leading edge and connected to the actuating mechanism. Above the lower cavity of the pusher piston there is a an annular cavity disposed coaxially with the cavity, separated from the cavity by the leading edge, connected to the valve controlling resetting of the pusher.