Network optimization information:

The leakage of hydraulic motor is not the same every moment, and its leakage also fluctuates periodically with the change of the phase angle of rotor rotation. Because the flow rate of the incoming motor is very small at low speed and the leakage rate is large, the instability of the leakage will obviously affect the flow rate involved in the motor work, thus causing speed fluctuations. When the motor is running at low speed, the inertia of its rotating part and load is small, and the above effects are obvious, so the creeping phenomenon occurs.

In fact, the lower the stable speed, the better. Hydraulic motor The service speed of the hydraulic motor is mainly limited by its service life and mechanical efficiency. With the increase of the speed, the wear of each motion pair increases, and the service life decreases. The higher the speed, the greater the flow that the hydraulic motor needs to input. Therefore, the flow rate of each overflow part increases accordingly, PH hydraulic motor The pressure loss also increases, thus reducing the mechanical efficiency.

For some hydraulic motors, the increase in speed is also limited by the back pressure. For example, Crankshaft connecting rod hydraulic motor , when the speed increases, Hydraulic motor of bending machine The return oil back pressure must be increased significantly to ensure that the connecting rod does not hit the crankshaft surface and avoid hitting the surface. When the speed of the oil return chamber increases, the back pressure required by the oil return chamber should also increase. The high back pressure will significantly reduce the efficiency of the hydraulic motor. To ensure the efficiency of the motor, the speed of the motor should not be too high to avoid too low.