Due to the action of pressure oil, the force imbalance makes the rotor produce torque. The output torque of the vane hydraulic motor is related to the displacement of the hydraulic motor and the pressure difference between the inlet and outlet of the hydraulic motor, and its rotational speed is determined by the size of the flow rate input to the hydraulic motor. As hydraulic motors are generally required to be able to forward and reverse, so the blade of the vane type hydraulic motor to be radially placed.
In order to make the blade root always through the pressure oil, in the return, pressure oil chamber through the blade root access should be set on the check valve, in order to ensure that the blade hydraulic motor in the pressure oil through the normal start, must make the top of the blade and the stator inner surface of the close contact, in order to ensure good sealing, so in the blade root should be set on the preloaded spring.
Vane hydraulic motor small size, small inertia, sensitive action, can be applied to the occasion of high commutation frequency, but the leakage is larger, low-speed work is not stable. Therefore, the vane hydraulic motor is generally used for high speed, small torque and sensitive action requirements of the occasion.
