1. Under normal working conditions, Hydraulic motor The inlet and outlet pressures of are higher than atmospheric pressure, so there is no hydraulic pump

Inhalation performance problems. However, if the motor may work under the working condition of the pump (for example, when the load falls), its inlet

The oil port should have a pressure corresponding to its speed to avoid cavitation, noise and vibration.

Since the return oil pressure of the motor is higher than the atmospheric pressure, its leaking oil pipe cannot be connected with the return oil port and must be led back separately

Oil tank.

two Low speed high torque hydraulic motor The motor may run forward and backward, so the hydraulic motor is required to have structural symmetry in design.

3: The actual working pressure difference of the hydraulic motor depends on the size of the load torque. When the moment of inertia of the driven part is large or the speed is high

High, and requires rapid braking or reverse rotation, which will produce high hydraulic impact. For this purpose, necessary security should be set in the system

Valve, buffer valve.

four Radial plunger hydraulic motor Since internal leakage is inevitable, there will still be slow slip when the motor oil port is closed for braking.

Therefore, when it is necessary to brake for a long time and keep the original position still, another brake shall be set to prevent slipping.

5. Some types of hydraulic motors must have sufficient back pressure at the oil return port to ensure normal operation, and the higher the speed

The higher the back pressure is required. The increase of back pressure means that the pressure utilization rate of oil source is low and the system loss is large.