Relevant Knowledge Points Of W-shaped Sealing Lip Oil Seal

The W-shaped sealing lip oil seal adopts a composite assembly structure. In addition to the internal steel ring as the framework, a metal retainer ring is added at the bottom of the oil seal to enhance its pressure resistance; It can withstand large deformation, and has the characteristics of nonlinear stress-strain behavior and incompressibility of viscoelastic behavior;

The oil seal prevents oil leakage through the cooperation between the rubber sealing lip and the shaft. As for the sealing principle of the rotary shaft seal, the micro pump theory is currently more convincing and verified by tests;

Since the inner diameter of the oil seal is smaller than the shaft diameter of the rotating shaft, that is, they belong to an interference fit. With the effect of the spring, the contact pressure on the contact area is asymmetrically distributed, and the distribution of the strain shape on the oil seal lip is proportional to the distribution of the contact pressure. Therefore, a wrinkle curve with opposite directions and asymmetry is formed, resulting in an unequal oil pumping effect in two directions, The combination of the two results in directional pump oil power and directional flow of lubricating oil;