Shac truck parts Hande Axle Rear Wheel Hub Oil Seal DZ90129340063 DZ90129340064

Working principle of Hande axle rear wheel hub oil seal:
Interference fit: In the free state, the inner diameter of the oil seal lip is smaller than the outer diameter of the axle, and there is a certain amount of interference. When installed on the axle, the oil seal lip fits tightly to the axle surface under the interference pressure and the contraction force of the spring, forming an effective sealing line of defense.
Oil film seal: During the driving process of the vehicle, the lubricating oil in the wheel hub will form an extremely thin oil film between the oil seal lip and the axle. Under the action of the lubricating oil pressure, the oil film is affected by the surface tension of the oil, and a "crescent" is formed on the outer edge of the rotating shaft and the oil seal lip, preventing the lubricating oil from leaking outward, and also preventing external impurities from entering the wheel hub, ensuring that the bearings and other components in the wheel hub can be well lubricated and protected.

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