Sealing Performance Analysis Of Recip Rocating Skeleton Oil Seal Based On Th Ermal-mechanical Coupling

The reciprocating skeleton oil seal is used for the sealing work of reciprocating systems and is an important component to ensure that oil does not leak.However,during the use of reciprocating skeleton oil seal,various factors can cause damage to the oil seal lip and reduced service life,which can lead to problems such as decreased sealing performance and ineffective sealing.Therefore,it is extremely important to study its sealing performance.In the past,this article focused on the impact of relevant parameters on the sealing performance of reciprocating skeleton oil seals,taking the compound skeleton oil seal as the research object.(1)In this paper,the finite element method is used to establish a thermalmechanical coupling analysis model for reciprocating skeleton oil seals,taking into account the thermal stress of rubber.The effectiveness of the model is verified through radial force measurement tests and friction measurement tests,The relative error is within 15%;Based on the model,the effects of temperature on the maximum deformation of oil seals,the maximum Von Mise stress,the maximum contact stress,and the distribution of lip contact stress with contact width were analyzed.(2)Due to the complexity of the practical application environment of reciprocatin g skeleton oil seals,in order to study the effects of various parameters on the sealing pe rformance of oil seals under different temperature loads,the effects of main spring prel oad,oil pressure,interference,and other parameters on the maximum deformation of t he oil seal and the mechanical properties of the main and second lips under different te mperature loads were analyzed.(3)Based on the obtained mechanical values and contact widths of the main and second lips of the reciprocating skeleton oil seal under different working conditions,the heat generation capacity of the two lips is calculated according to Coulomb’s friction law,and the changes in heat generation capacity and heat flow density with reciprocating speed,friction coefficient,oil pressure,and interference are analyzed.(4)Based on the results obtained from the analysis of the thermal-mechanical coupling model of the reciprocating skeleton oil seal,the geometric model of the deformed oil seal is extracted,a new temperature field distribution model is established,and the boundary conditions of the temperature field model are improved according to the heat generation and the contact area between the oil seal lip and the shaft.Finally,the reciprocating speed,friction coefficient,oil temperature,ambient temperature The influence of interference on the temperature distribution of the oil seal lip and the influence of reciprocating speed,friction coefficient,and interference on the maximum temperature of the lip under different temperature loads.Under certain conditions,the lip temperature can reach more than 100 °C.