Further Observations in Wiper design and Particle Transport Simulation in the Sealing Gap

In the last ISC results with several wiper designs with regards to dirt insert rate into a sealing system was presented. Also, the simulation of the motion of such particles in the sealing gap was shown. Material wear resistance and fluid streamlines before the lip seems to have an influence on particle’s ability to pass the gap between seal and rod. In this paper, starting from a standard wiper, lip design alterations were tested. By changing the wiper’s lip design a change in the flow lines of the fluid and therefore the particle insert rate was intended. Among the lip design changes furthermore the improvement in simulation of particle flow in the wiper-rod interaction area is presented. The effects of the lip variation on the particle insert test results will be discussed and compared with simulation results.