Influence of elastomer compound design on the performance of rotary shaft lip seals

Abstract

Spring-energized rotary shaft lip seals are widely accepted as efficient and cost-effective bearing seals. There is a trend towards increasing shaft speeds, the use of wear-resistant coatings and requirements to minimize seal leakage either for cost or environmental reasons while maximizing seal life. At present, higher surface speeds and improved sealing efficiency result in higher under-lip temperatures, limiting seal life and increasing seal friction. This feature discusses research conducted to investigate the effects of harsher operating conditions, and the development of a new elastomer compound with inherent heat dissipation properties and superior wear resistance without prohibitive increases in friction or cost. Material property data and functional test results from laboratory and field trials are discussed.