Frictional Heat Effect and Wear Characteristics Analysis for a Reciprocating Seal in the Fuel Actuator
The thrust vector control actuator uses fuel as the transmission medium.The low viscosity of the fuel makes the sealing contact in poor lubrication conditions,and the problem of friction and wear of the seal is prominent.Aimed to investigate the influences of working conditions of different pressures,velocities and oil temperatures,a thermo-elastohydrodynamic mixed-lubrication numerical model for a reciprocating seal is established to analyze the effect of frictional heat of sealing contact on oil film behaviour.The boundary conditions for thermal analysis are determined to calculate the transient temperature distribution of the sealing system.According to the thermal analysis results,the oil viscosity and film thickness in the sealing area are corrected.The frictional heat effect on sealing performance and wear characteristics is explored by considering the seal's lubrication condition.The impacts of the different working conditions on film thickness,friction force and wear depth distribution are analyzed.The results will provide a theoretical basis for designing high-performance aerospace seals.
万方数据
维普
