Research On The Interface Bonding Performance Of Composite Oil-film Bearing Bush

Oil-film bearings are widely used in heavy machinery,large-scale water conservancy and hydropower,aerospace engineering and other fields.Bushing as the core of oil-film bearing parts,its structure and the force in the operation plays an important role in the ultimate performance of oil-film bearing.Bushing as the most vulnerable parts of oil-film bearing,the combining performance issues of the composite material often leads to the damage of the bushing.Therefore,it is very important to study the bonding performance of the composite oil-film bearing bushing.In this paper,through the micro simulation analysis of bushing interface,the interfacial binding mechanism is studied,and some influencing factors on the interfacial binding energy were studied.Through the analysis of the force field in the actual work of the bushing,some factors affecting the influence of the stress distribution in the bushing were studied.And the binding performance of the new composite bushing was studied by experiment,which provides a reference for improving the binding performance of the bushing.The main research contents are as follows:(1)Based on the molecular dynamics theory,the interface of bushing composite materials was modeled at the molecular scale.Molecular dynamics simulation of the interface of the bushing composite materials was carried out and the interfacial binding energy was calculated.And the mechanism of the interface of the bushing was studied.The effect of tin layer on the interfacial bonding properties was studied.The interfacial binding energy of the interface with different thickness was simulated and calculated.The influence of the thickness of Babbitt alloy on the binding performance of the bushing was studied from the microscopic aspect.(2)The actual stress of the bushing has been analyzed and calculated.The thick-walled cylinder theory is used to calculate the assembly stress of the bushing,and the reliability of the calculation was validated by finite element simulation.The analysis is carried out for the bushing with assembly stress and no assembly stress.At the same time,the friction force and friction free of the bushing are simulated,and the effect of them on the bushing was studied.(3)The finite element simulation of different surface shapes of the bushing was carried out.And the effects of different surface shapes on the stress distribution of the bushing were observed.The stress of the bushing under different thickness of Babbitt layer is simulated and analyzed.And the effect of the thickness of Babbitt on the stress of bushing was studied.It provides a reference for the design and improvement of bushing structure.(4)Experimental study on binding performance of composite oil-film bearing bushing was carried out.Two commonly-used experimental methods were compared and analyzed,and the suitable test method was selected.The test specimens were subjected to destructive binding strength test,and the binding strength was measured.And the binding strength of the bushing under other manufacturing processes was compared.Recommendations for the manufacturing process of the bushing are presented.