There is a case of leakage caused by improper lip contact due to the build-up of sludge on the lip area. Sludge, which is mainly carbide, is generated typically from aged oil under high temperature (150°C or more) conditions. However, it can also be generated in driving systems such as transfers. We analyzed the mechanism of sludge generation and optimized the seal design to avoid leakage under this environment.
Citation: Yasui, H., Tomiyama, T., Fujie, K., and Tamura, T., "Influence of Sludge on Seal Performance," SAE Technical Paper 980849, 1998, https://doi.org/10.4271/980849. Download Citation
