Working principle one of oil seal:

1. In a free state, the inner diameter of the lip of the oil seal is smaller than that of the axle diameter, which has a certain amount of interference.

Under the action of lubricating oil pressure, the oil penetrates into the edge of the oil seal and the rotating shaft to form an extremely thin oil film. The oil film is affected by the surface tension of the oil, forming a "crescent" surface on the outer edge of the rotating shaft and the oil seal edge to prevent oil spillover and play a sealing role. At Sanping Machinery, a trusted

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