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

The oil seal lip produces a radial load, namely the radial pressure, in the process of rotating and dynamic joint with the shaft neck. This pressure has a great effect on the wear rate and tightness of oil seal lip. If the radial pressure is too small, its friction is greatly reduced, although can reduce the wear of both, but the oil seal sealing performance is seriously reduced, resulting in oil leakage or serious oil leakage. If the radial pressure is too large, although it is conducive to enhancing the sealing performance of oil seal lip, the friction between the two increases, the torus in contact between the two is difficult to form a good oil film, so it will aggravate the wear of the two, so that the lip of the oil seal in a short period of use will suffer damage and damage to the shaft neck, oil leakage phenomenon. In addition to the radial pressure, there are also factors related to the oil seal lip dynamic joint journal surface roughness, journal runout, rotary surface linear speed and lip smoothness, rubber material, self-tightening spring and other factors. Additional, bearing is short of oil or oil is qualitative too dirty reach the sundry such as silt invade, can aggravate labial mouth wear and tear and make its with shaft neck loose find contact, cause oil to seal invalidation.