The hydraulic motor is an actuator of the hydraulic system, which converts the hydraulic pressure energy provided by the hydraulic pump into the mechanical energy of its output shaft. Also known as an oil motor, it is mainly used in injection molding machinery, ships, hoists, construction machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, marine machinery, petrochemical industry, port machinery, etc. As an odm original hydraulic pump factory, next, I will explain the difference between hydraulic motors and hydraulic pumps in detail.

Can a hydraulic motor replace an electric motor?

Whether the hydraulic motor can replace the motor depends on the actual situation. The power source of the hydraulic motor also depends on the motor or the engine to provide the power source. After the hydraulic system pump valve is converted, the hydraulic motor can be driven to provide the power source. As for whether to use a hydraulic motor or an electric motor, it depends on the actual situation. If the required torque is large, it must be driven by the hydraulic motor. If the torque is generally driven by the motor.

Similarities between hydraulic motors and hydraulic pumps

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

2. The hydraulic motor and the hydraulic pump have the same basic structural elements - a closed and cyclically variable volume and a corresponding oil distribution mechanism. The working principle of the hydraulic motor and the hydraulic pump is to use the change of sealing working volume to absorb 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.

Differences between hydraulic motors and hydraulic pumps

1. The hydraulic pump is a conversion device that converts the mechanical energy of the motor into hydraulic energy. It outputs flow and pressure. It is hoped that the volumetric efficiency is high; the hydraulic motor is a conversion device that converts the pressure energy of the liquid into mechanical energy. efficient. Therefore, the hydraulic pump is the energy device, and the hydraulic motor is the actuator.

2. The steering of the output shaft of the hydraulic motor must be able to rotate forward and reverse, so its structure is symmetrical; and some hydraulic pumps (such as gear pumps, vane pumps, etc.) have clear regulations on the steering, which can only be rotated in one direction, not at will Change the selection direction.

3. In addition to the oil inlet and outlet ports, the hydraulic motor has a separate oil leakage port; the hydraulic pump generally only has the oil inlet and oil outlet ports (except for the axial piston pump), and the leakage oil in it is connected with the oil inlet port.

4. The volumetric efficiency of hydraulic motors is lower than that of hydraulic pumps.

5. Usually the working speed of the hydraulic pump is relatively high, while the output speed of the hydraulic motor is low.

6. In addition, the oil suction port of the gear pump is large and the oil discharge port is small, while the suction and discharge ports of the gear hydraulic motor are the same size.

7. The number of teeth of the gear motor is more than that of the gear pump.

8. The vane of the vane pump must be installed obliquely, while the vane of the vane motor is installed radially; the vane of the vane motor relies on the swallow spring at the root to press it on the surface of the stator, while the vane of the vane pump relies on the pressure of the root. Oil and centrifugal force act on the stator surface.

In terms of the working principle, both hydraulic motors and hydraulic pumps work by changing the volume of the sealed working chamber. However, due to their different use purposes, there are many differences in structure, and generally, they cannot be directly reversed.