Research On Mechanical Properties And Wear Process Of Rotary Shaft Lip Seal

Rubber rotary shaft lip seal(referred to oil seal)has great properties,such as followability,compensability,low friction resistance,low cost,etc.So it is widely used for sealing various rotating machinery,but when the seal fails,it will greatly affect the efficiency of the whole machine,even cause significant personal casualties and property losses.Therefore,it is of great significance to carry out research on sealing technology of rotary shaft lip seal.For the current situation that the mechanical properties of the rotary shaft lip seal are relatively single,this paper proposes a comprehensive evaluation method on the advantages and disadvantages of various mechanical properties of the oil seal.In view of the tedious and low-accuracy wear research process,a method based on the wear factor model and using the Abaqus/UMESHMOTION user subroutine to implement its adaptive dynamic wear simulation process is proposed.The details are as follows:Firstly,the structure and materials of oil seal system are first designed,and then uniaxial tensile experiments are conducted to obtain the material parameters.Subsequently,the finite element model is established.Secondly,FEA based mechanical properties analysis.The effects of various structural and operating parameters on mechanical properties such as contact pressure,radial force,internal stress,and displacement of the oil seal are evaluated.Subsequently,according to the obtained conclusions,more reasonable structure and working parameters can be chosen.Then,the wear process of oil seal research based on FEA.The wear factor model suitable for oil seal operating conditions is derived to control the wear rate.UMESHMOTION user subroutine is then used to adaptively re-mesh the corresponding areas,and realize continuous simulation.The oil seal wear process is analyzed based on the calculation results when the simulation is completed.Lastly,oil seal wear test design and do experiments.We further study on the process of oil seal,and compare the lip shape and wear depth of the oil seal after wear with calculated values.The experimental results verify the correctness of the above finite element method.