Network optimization information:

Structural differences:

one Hydraulic motor Generally, it needs to rotate back and forth, so the internal structure should be symmetrical, while the hydraulic pump generally rotates in one direction, which is unnecessary.

2. In order to reduce the oil suction resistance and radial force, the size of the oil suction port of the hydraulic pump is larger than the size of the oil outlet. However, the pressure in 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 needs to work normally in a wide speed range. Therefore, hydraulic bearing or hydrostatic bearing shall be adopted. Because when the motor speed is very low, it is difficult to form a lubricating film if dynamic bearing is used.

4. Vane pump relies on centrifugal force generated by high-speed rotation of blades and rotors, SAYI hydraulic motor Make the blade stick to the sealing oil on the inner surface of the stator all the time to form a working volume. If SAOS hydraulic motor As a motor, a spring must be installed at the blade root of the hydraulic motor to ensure that the blade is always stuck to the inner surface of the stator so that the motor can start normally.

5. The hydraulic pump shall have self-priming capacity in structure, but the hydraulic motor does not have this requirement.

6. The hydraulic motor must have a large starting torque. The so-called starting torque is the torque that can be output to the motor shaft when the motor starts from the static state, which is usually greater than the torque under the operating state under the same working pressure difference. Therefore, in order to make the starting torque as close as possible to the torque under the working state, the motor is required to have small torque ripple and internal friction.