W-shaped seal lip oil seal is mainly used in continuous casting equipment, the oil seal has a good sealing effect, dustproof, anti-deformation, anti-leakage, and can maintain lubrication, and has low friction performance and good ventilation;
The W-shaped seal lip oil seal adopts a composite assembly structure. Besides the steel ring as the skeleton inside, a metal stop 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 stress-strain nonlinear behavior, viscoelastic behavior and incompressibility.
Oil seal is to prevent oil leakage through the coordination between the rubber seal lip and the shaft. As for the sealing principle of the rotary shaft seal, the micropump theory is more convincing and verified by experiments.
Because the inner diameter of the oil seal is less than the shaft diameter of the rotating shaft, that is, the two belong to interference fit. Coupled with the action of the spring, the contact pressure in the contact area is asymmetrical, while the strain shape distribution on the rim of the oil seal lip is proportional to the distribution of the contact pressure, so the opposite direction and asymmetric wrinkles are formed, resulting in two unequal pumping effects. The combined results of the two forms a directional pump oil power and a directional flow of lubricating oil.