The similarities and differences between hydraulic motors and hydraulic pumps

The similarities and differences between hydraulic motors and hydraulic pumps

1....The similarities between hydraulic motors and hydraulic pumps
①In principle, hydraulic motors and hydraulic pumps are reversible. If driven by an electric motor, the output is pressure energy (pressure and flow). This is the hydraulic pump; if pressure oil is input, the output is mechanical energy (torque and speed). ), it becomes a hydraulic motor.

② From the structural point of view, the two are similar.

③The working principle of hydraulic motor and hydraulic pump is to use the change of seal working volume to suck and discharge oil. For hydraulic pumps, oil is sucked when the working volume increases, and high-pressure oil is discharged when the working volume decreases. For hydraulic motors, high-pressure oil enters when the working volume increases, and low-pressure oil is discharged when the working volume decreases.


2...The difference between hydraulic motor and hydraulic pump
①Hydraulic pump is a conversion device that converts the mechanical energy of the motor into hydraulic energy. It outputs flow and pressure and hopes that the volumetric efficiency is high; the hydraulic motor is a conversion device that converts the pressure energy of the liquid into mechanical energy. It outputs torque and speed and hopes mechanical efficiency. high. Therefore, the hydraulic pump is the energy device, and the hydraulic motor is the actuator.

②The steering of the output shaft of the hydraulic motor must be able to rotate forward and reverse, and the steering of hydraulic pumps such as gear pumps and vane pumps has clear regulations, which can only be rotated in one direction, not at will.
A hydraulic motor is an executive element that converts hydraulic energy into mechanical energy for continuous rotary motion.

The hydraulic motor and the hydraulic pump have the same basic structural elements-a closed but cyclically variable volume and corresponding oil distribution mechanism.

In terms of working principle, both hydraulic motors and hydraulic pumps rely on changes in the volume of the sealed working chamber. However, due to the different purposes of use, there are many differences in structure. Generally, they cannot be directly reversed and used. Only a few pumps can work. Use of hydraulic motors.