Optimal Design of Power Transfer Unit Oil Seal Considering Pressure Drop Generated during Water-Way Driving

Abstract:

This study investigated the pressure drop generated in the power transfer unit (PTU). During water-way driving, this pressure drop could open the lips of an oil seal and caused critical problems, such as water intrusion into or oil leakage out of the PTU. Optimal design of oil seal shape was proposed in order to prevent the unexpected failure of oil seal. As the result of the test to check the effects of the vacuum pressure, it was found that outside water was flowed into inside at - 0.4 bar for dust lip without any interference, whereas, there was no intrusion of outside weater through the seal with interferences of dust lips even at - 0.8 bar. But the seal with interferences of dust lips had 30~40 % higher than that without interference because the interference of dust lip with shaft made friction force increased at the interface between rubber and shaft.

• Periodical: Key Engineering Materials (Volume 739)
• Pages: 247-251
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.739.247
• Online since: June 2017
• Authors: Tae Hyung Kim*, Chang Gon Kim, Eun Min Park, Sok Choi, Bo Ram Lee
• Keywords: ACM, Oil Seal, Power Transfer Unit (PTU), Pressure Drop, Water-Way Driving

References

[1] S. Choi, B. R. Lee, J. H. An, T. H. Kim, E. M. Park and C. G. Kim, Hyundai Motors Group International Conference(2016), in-Press.

[2] S. W. Zhang, in: Tribology of Elastomers, Chapter. 2 (2004), pp.21-23.