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Français- Similarities between hydraulic motor and hydraulic pump
1. In principle, the hydraulic motor and hydraulic pump are reversible. If the motor is used to drive, the output is pressure energy (pressure and flow), which is the hydraulic pump; If pressure oil is input and mechanical energy (torque and speed) is output, it becomes a hydraulic motor.
Structurally, they are similar.
2. The hydraulic motor and hydraulic pump have the same basic structural elements
The volume of the oil distribution mechanism can change correspondingly with the closed cycle. The working principle of hydraulic motor and hydraulic pump is to absorb and discharge oil by using the change of sealing working volume. For the hydraulic pump, when the working volume increases, it absorbs oil, and when the working volume decreases, it discharges high-pressure oil. For hydraulic motors, high-pressure oil will enter when the working volume increases, and low-pressure oil will be discharged when the working volume decreases.
- Differences between hydraulic motor and hydraulic pump
1. The hydraulic pump is a conversion device that converts the mechanical energy of the motor into hydraulic energy. It outputs flow and pressure and hopes to have high volumetric efficiency;
Hydraulic motor is a conversion device that converts the pressure energy of liquid into mechanical energy. It outputs torque and speed, hoping for high mechanical efficiency. Therefore, the hydraulic pump is an energy device, and the hydraulic motor is an 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; Some hydraulic pumps (such as gears
The direction of the pump blade can only be changed at will.
3. Besides the oil inlet and outlet, the hydraulic motor also has a separate oil leakage port; Generally, the hydraulic pump has only oil inlet and outlet (axial column
Plug (except for the pump), and the leaked oil in it is connected with the oil inlet.
4. The volumetric efficiency of hydraulic motor is lower than that of hydraulic pump.
5. Generally, the working speed of the hydraulic pump is relatively high, while the output speed of the hydraulic motor is relatively low.
6. In addition, the oil suction port of the gear pump is large and the oil discharge port is small, while the oil suction and discharge ports of the gear hydraulic motor are the same size.
7. The gear motor has more teeth than the gear pump.
In terms of working principle, both hydraulic motor and hydraulic pump work by changing the volume of sealed working chamber. However, due to their different purposes and many differences in structure, they can not be used against each other directly.
