Check Valve Device In The Suction Side of A Hydrostatic Power-Unit That Can Be Operated In The Same Direction of Rotation As A Pump And As A Motor

摘要

A hydrostatic power-unit (7) is connected with an internal combustion engine (2). The suction side (S) of the power-unit (7), when operating as a pump, sucks hydraulic fluid from a tank (9) and delivers into a delivery side (P), and when operating as a motor is driven by hydraulic fluid from a hydraulic accumulator (20). A check valve device (30) is located in the suction side (S) to provide a pressure increase when the power-unit (7) is operated as a motor. The check valve device (30) has a check valve (32) operated by an actuator device (31). The actuator device (31) actuates the check valve (32) between a closed position (32a) in which a connection of the suction side (S) with the tank (9) is shut off, and an open position (32b) in which the connection of the suction side (S) to the tank (9) is opened.

主权项

1. A check valve device for a hydrostatic power-unit in a drive connection with an internal combustion engine, comprising:
a check valve device located in a suction side of a hydrostatic power-unit operable as a pump and a motor such that when the power-unit is operated as a motor, a pressure increase is provided on the suction side, wherein the check valve device includes a check valve connected to an actuator device, and wherein the actuator device actuates the check valve between a closed position in which a connection of the suction side with a tank in the direction of flow from the suction side to the tank is shut off, and an open position in which the connection of the suction side to the tank is opened.