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To the oil side of the pumping action by the tectonic deformation.
1 Summary: oil seal is a sealing element for rotating shaft sealing machinery and equipment, and the cavity basically is stationary.

2 oil seal oil seal sealing state: outer rim and the cavity between to static seal, while ensuring reliable seal in the cavity between the outer edge location. Oil seal sealing state between the lip and shaft as the shaft rotates, dynamic seal, shaft static to static seal.

3 sealing principle: in order to achieve the sealing effect, must make a layer of oil film forming shaft and the oil seal lip gap, in the surface tension of the liquid and the framework oil seal lip function, form a layer of oil film, to prevent the leakage of working medium, so as to realize the sealing of rotating shaft. The oil film thickness is too large, oil seal leakage; thickness is too small, may be caused by dry friction occurs, the oil seal and the shaft wear; no oil film between the seal lip and shaft, is easy to cause fever, wear. Oil film forming has many influence factors. For example: sliding surface finish, the occurrence of contact part of the pressure distribution and so on.