Research On Bushing Wear And Interfacial Stress Field Of Oil Film Bearing

Taking the actual working state of the oil film bearing as the background,the finite element model of the oil film bearing bushing is established according to the actual operating state of the oil film bearing.The bushing is made of two materials bonded together.Due to the different physical properties of the materials,Bushing will be affected by environmental temperature,oil film pressure,external pressure,scratches and defects on the bonding interface of the two materials,etc.The stress field of the bonding interface of the oil film bearing bushing is deeply analyzed.The singular stress field model of the bonding interface of two materials given by Yang and Munz,combined with the Reynolds equation and the elastodynamic deformation equation,is used to theoretically derive the bonding interface stress field of the oil film bearing bushing considering the surface roughness of the bonding interface.Compiled by MATLAB to calculate stress intensity factor,the influence parameters,such as oil film pressure,calculation with the surface roughness of bonding interface stress field solution,obtained with the surface roughness and bonding interface bonding interface end of stress distribution and stress distribution curve,and analysis the influence of surface roughness on the bonding interface stress field and the maximum stress.From a practical point of view,the force of the oil film bearing bush was analyzed,including the internal force under actual operating conditions and the thermal stress caused by temperature.The finite element model of the bushing was established by using the finite element software and different force loads were applied to the model,and the stress at the bond interface of the oil film bearing bushing was obtained under different load conditions.The same load or temperature load is obtained by setting a series of load gradients on the other load while keeping the same load or temperature load.The influence of different load values or temperatures on the stress of the bond interface is analyzed.Finally,the influence degree of different loads on the interface stress of oil film bearing bushing is analyzed.The formula for adding surface roughness to the stress field of the bushing bond interface is deduced and calculated,and the calculation formula for the stress field of the bond interface considering the surface roughness is derived by itself,making the theoretical deduction and finite element calculation closer to the actual operation.The oil film bearing in the state,and the influence of different materials on the odd stress of the interface is analyzed and discussed.The finite element model of the bushing with non-ideal bonding interface is established,and the stress distribution of the interface under two conditions is analyzed by comparing with the finite element model of the bushing with ideal bonding interface,and the influence of the bond and interface wear on the stress distribution and stress concentration is obtained.Finally,the influence of different conditions and different factors on the bond interface stress of oil film bearings and the degree of damage are analyzed,which provides a reference for the industry for the manufacture and improvement of oil film bearings.