Commissioning of hydraulic universal testing machine oil pump

Press the button on the dynamometer table to start or stop the rotation of the hydraulic universal testing oil pump. When the first running or changing the wiring connector after installation, the groove wheel direction should be observed, and before starting to check whether the oil tank to the oil pump circuit is connected, if not, can properly tighten the connection thread between the oil tank and the tubing, oil Can enter the oil pump.

In the first operation of the oil pump, the side cover of the dynamometer is removed to observe whether there is an intermittent phenomenon of oil flowing back to the tank by the oil supply valve. If there is such a situation, the upper M8 of the oil pump can be blocked off to remove the air and then the oil in the oil tank can be observed whether the oil is intermittent. If there is such a phenomenon again, the hexagonal screw on the end surface of the oil pump can be screwed down. Push the steel ball of the oil delivery valve in the oil pump with a steel wire hook to observe whether the steel ball jumps (when the oil pump is in operation) and after the steel ball moves, screw up the hexagonal screw, and the oil pump will work normally.

After the cylinder nozzle may also have air into the pipe, will affect the unsteady pointer rotation, the elimination method is to start the oil pump, close the return valve, open the feed valve, so that the main working piston rises a certain distance, and then open the return valve, so that the oil pump through the working cylinder through the return valve, back to the tank, such a cycle for a period of time. Time, the internal air can be discharged and the air is cleared.