Network optimization information:

1. The hydraulic motor generally needs forward and reverse rotation, so the internal structure should be symmetrical, while the hydraulic pump generally rotates in one direction, so there is no such requirement.

2. In order to reduce oil suction resistance and radial force, the size of oil suction port of hydraulic pump is generally larger than that of oil outlet. The pressure of the low pressure chamber of the hydraulic motor is slightly higher than the atmospheric pressure, so there is no such requirement.

3. The hydraulic motor is required to work normally in a wide speed range, and hydraulic bearings or hydrostatic bearings shall be used.

When the motor speed is low, the dynamic pressure bearing is used, and the lubricating film is not easy to form.

4. Centrifugal force generated by vane pump through high-speed rotation of vane and rotor, Inner five-star hydraulic motor The blade is always close to the inner surface of the stator to play the role of sealing oil and form a working volume. If it is used as a motor, a spring must be installed at the root of the blade of the hydraulic motor to ensure that the blade is always close to the inner surface of the stator so that the motor can start normally.

5. The hydraulic pump needs to ensure the self suction force in structure, but the hydraulic motor does not have this requirement.

6. The hydraulic motor must have a large starting torque. Starting torque refers to that when the motor starts under static state, Steel ball motor The torque that can be output on the motor shaft is usually greater than the torque under the operating state under the same operating pressure difference. Therefore, in order to make the starting torque as close as possible to the torque under the operating state, the motor torque has small pulsation and internal friction.