Comparison of similarities and differences between hydraulic motor and hydraulic pump      

The same point of hydraulic motor and hydraulic pump

From the principle, hydraulic motor and hydraulic pump is reversible, if the motor drives, the output is the pressure (pressure and flow) that is hydraulic pump; if the input pressure oil output mechanical energy (torque and speed), a hydraulic motor.

(2) structurally, the two are similar.

The working principle of hydraulic motor and hydraulic pump is to make use of the change of sealing working volume to absorb oil and drain oil. For the hydraulic pump, working volume increases when the absorption volume decreases from high pressure oil. For hydraulic motor, when the working volume increases, it enters high pressure oil and reduces the working volume to discharge low pressure oil.

The difference between hydraulic motor and hydraulic pump

The hydraulic pump is a motor mechanical energy into hydraulic energy conversion device, the output flow and pressure to high volumetric efficiency; the hydraulic motor is the pressure of the liquid can be converted to mechanical energy conversion device, output torque and rotational speed, high mechanical efficiency hope. Therefore, the hydraulic pump is the energy device, and the hydraulic motor is actuator.

The steering of the output shaft of the hydraulic motor must be able to turn forward and reverse, and the steering of the hydraulic pump such as gear pump and vane pump is clearly defined, and can only rotate in one direction, and can not be arbitrary.

The hydraulic motor is the hydraulic actuators can be converted to continuous rotary movement of the mechanical energy.

Hydraulic motor and hydraulic pump have the same basic structural elements - closed and periodically variable volume and the corresponding oil distribution mechanism.

From the working principle, hydraulic motor and hydraulic pump are relying on the change of the sealing chamber volume of the work, but because of their different purposes, there are many differences in the structure, it can not be directly reciprocal common, only a few can be used as a hydraulic motor pump.