Oil suction process: When the rotor rotates in a clockwise direction, on the right side of the figure, the vanes extend under the action of centrifugal force and other forces, making them come into close contact with the inner surface of the stator. As the rotor rotates, the sealed volume between two adjacent vanes gradually increases, creating a local vacuum. At this time, the oil in the oil tank enters these sealed volumes through the oil suction port under the action of atmospheric pressure, thus achieving the oil suction process.
Oil pressure process: On the left side of the figure, as the rotor continues to rotate, the vanes are gradually pressed into the rotor slots under the action of the inner surface of the stator. The sealed volume between two adjacent vanes gradually decreases, and the oil is squeezed and discharged through the oil pressure port, completing the oil pressure process.
