Influence of contaminants in oil on oil seal performance

摘要

In order to clarify the oil leakage mechanism of radial lip seals, seal lip behavior and oil leakage phenomena were observed using a CCD camera through a hollow glass shaft. The results showed that the contact area of the lip changed with the increase of the dynamic run out (DRO). It was also showed that the contact area changed drastically when a seal lip was worn. The observation of seal lip behavior in the contaminated oil revealed that this behavior of lip contact area allowed the contaminants in the oil to penetrate the lip contact area. It was confirmed that due to the contamination within lip contact area, the oil leakage easily occurred.