1) Ensure the lubrication of the bearing. When the shaft rotates, the screw seal works like a screw, continuously sending oil to the bearing to ensure the lubrication of the bearing;
2) It is not limited by the shaft speed of the shock absorber. The higher the speed, the greater the sealing pressure, especially at high speeds, which can exert a sealing effect to ensure that there is no oil in the shock absorber;
3) When the screw seal rotates at the same time as the shaft, there is a certain radial gap between the screw and the stationary part, no friction loss, reduced power consumption, low heat generation, long life, no vibration and noise, and high reliability;