The difference between hydraulic vane motor and hydraulic pump

1. The hydraulic pump is a conversion device that converts the mechanical energy of the motor into hydraulic energy. Output flow and pressure, high volumetric efficiency is expected; hydraulic motor is a conversion device that converts liquid pressure energy into mechanical energy, and outputs torque and speed. High 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 forward and reverse, so its structure is symmetrical; and some hydraulic pumps (such as gear pumps, vane pumps, etc.) have clear regulations on steering, which can only be rotated in one direction and cannot be changed at will. Direction.
3. In addition to the oil inlet and outlet of the hydraulic motor, there is a separate oil leakage port; the hydraulic pump generally only has an oil inlet and an oil outlet (except the axial piston pump), and the internal oil leakage is connected with the oil inlet.
4. The volumetric efficiency of hydraulic motors is lower than that of hydraulic pumps.
5. Generally, the working speed of hydraulic pump is relatively high, while the output speed of 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 port and the oil discharge port of the gear hydraulic motor have the same size.
7. Gear motors have more teeth than gear pumps.
8. The blades of the vane pump must be installed obliquely, while the blades of the vane motor are installed radially; the blades of the vane motor rely on the swallow spring at the root to press it against the surface of the stator, while the blades of the vane pump rely on the pressure oil and centrifugal force at the root to press it. On the surface of the stator.
In terms of working principle, whether it is a hydraulic motor or a hydraulic pump, it depends on the change of the volume of the sealed working chamber. However, due to the different purposes of use, there are also many differences in structure, and generally cannot be used directly and in reverse.
hydraulic vane motor
2. The steering of the output shaft of the hydraulic motor must be forward and reverse, so its structure is symmetrical; and some hydraulic pumps (such as gear pumps, vane pumps, etc.) have clear regulations on steering, which can only be rotated in one direction and cannot be changed at will. Direction.
3. In addition to the oil inlet and outlet of the hydraulic motor, there is a separate oil leakage port; the hydraulic pump generally only has an oil inlet and an oil outlet (except the axial piston pump), and the internal oil leakage is connected with the oil inlet.
4. The volumetric efficiency of hydraulic motors is lower than that of hydraulic pumps.
5. Generally, the working speed of hydraulic pump is relatively high, while the output speed of 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 port and the oil discharge port of the gear hydraulic motor have the same size.
7. Gear motors have more teeth than gear pumps.
8. The blades of the vane pump must be installed obliquely, while the blades of the vane motor are installed radially; the blades of the vane motor rely on the swallow spring at the root to press it against the surface of the stator, while the blades of the vane pump rely on the pressure oil and centrifugal force at the root to press it. On the surface of the stator.
In terms of working principle, whether it is a hydraulic motor or a hydraulic pump, it depends on the change of the volume of the sealed working chamber. However, due to the different purposes of use, there are also many differences in structure, and generally cannot be used directly and in reverse.
hydraulic vane motor