A mixed lubrication model of a rotary lip seal using flow factors

A mixed lubrication model of a rotary lip seal using flow factors has been developed. The model consists of coupled fluid mechanics, contact mechanics and deformation mechanics analyses. The fluid mechanics analysis is described by a Reynolds equation that takes into account the surface roughness effect using flow factors. The contact mechanics analysis uses the Greenwood and Williamson model to compute contact pressure. The deformation mechanics analysis utilizes the influence coefficient approach to compute deformation of the seal. Results for a typical seal show how the operation parameters and the surface roughness affect seal behavior.

► Predicts performance: minimum film thickness, contact area, pumping rate, friction torque.
► Analyzes fluid mechanics, asperity contact, and elastic deformation of the lip.
► More computationally efficient than deterministic approach.
► Provides effective tool for designer to predict and optimize performance of a seal design.