How to solve the oil leakage of oil pump frame oil seal?

In the process of rotating and dynamic engagement between the oil seal lip and the journal, a radial load, i.e. radial pressure, is generated. This pressure has a great influence on the wear rate and sealing performance of the oil seal lip. If the radial pressure is too small, the friction will be greatly reduced. Although the wear of the two can be reduced, the sealing performance of the oil seal will be seriously reduced, resulting in oil leakage or serious oil leakage. If the radial pressure is too large, although it is beneficial to enhance the sealing performance of the oil seal lip, the friction between the two is increased, and it is difficult to form a good oil film on the ring surface contacted by the two, so it will intensify the wear of the two, so that the oil seal lip will be damaged and the journal will be damaged in a short service life, resulting in oil leakage. In addition to the radial pressure, the factors that affect the sealing performance of the oil seal are also related to the surface roughness of the journal, the journal runout, the linear speed of the rotating surface, the smoothness of the lip, the rubber material and the spring force of the self tightening spring. In addition, if the bearing is short of oil or the oil quality is too dirty and mud and other foreign matters enter, the lip wear will be intensified and the journal will be in loose contact, resulting in the failure of oil seal.