Thermal-structural Coupling Analysis Of Split Rolling-sliding Bearing

Split rolling-sliding bearing is a new type of bearing formed by cutting the inner ring and the outer ring of overall rolling-sliding bearing and bolting together.Split rolling-sliding bearing make the replacement of bearings more convenient,especially difficult parts,so there is a certain realistic demand for split rolling-sliding bearing.Internal friction,rolling,and impact during the operation of the bearing with the production of heat,when the heat is accumulated to a certain degree,the bearing's temperature will be too high fail and the the bearing fails.In order to understand the distribution of temperature field during steady state operation of split rolling-sliding bearing and the influence of thermal load on bearing stress and deformation,this paper takes split rolling-sliding bearing as the research object to carry out the steady thermal analysis,the research work mainly includes the following four parts:1)Simulating the static of split rolling-sliding bearing by ABAQUS,obtain the contact stress and deformation of split rolling-sliding bearing under a certain static load,which lays the foundation for the subsequent thermal-structural coupling analysis of the split rolling-sliding bearing.2)Establish the heat calculation model of split rolling-sliding bearing based on the Palmgren bearing heat calculation formula,and establish the Thermal Network Equation by Thermal Network Method,then obtain the steady temperature field of split rolling-sliding bearing under certain load and speed conditions,and the effect of load and speed on bearing temperature.The results show that the temperature of the split rolling-sliding bearing's part from high to low is: outer ring raceway,outer ring,slider,roller,inner ring raceway and inner ring,the temperature of split rolling-sliding bearing increases linearly with the load,it also increases with the rotation speed,and the higher temperature with greater increase speed.3)Establish the steady temperature field model of split rolling-sliding bearing by ABAQUS,obtain the temperature field of split rolling-sliding bearing through simulation calculation.The results show that the temperature of bearing's part from high to low is: outer ring raceway,inner ring raceway,slider,outer ring,roller,and inner ring,comparison of the finite element results with the results obtained by the thermal network method shows the maximum error is 8.2%,then confirm the correctness of the finite element model of the steady temperature field of split rolling-sliding bearing,lay the foundation for thermal-structure coupling analysis of split rolling-sliding bearing.4)Based on the static analysis of the split rolling-sliding bearing,establish the thermal-structure coupling model of the split rolling-sliding bearing,and use the steady temperature field obtain by the finite element method as the thermal load.Then obtain thethermal-structural coupling simulation results of split rolling-sliding bearing under certain loads,compare with the static analysis results shows: split rolling-sliding bearing overall maximum stress in thermal-structure coupled conditions slightly larger than no thermal load conditions;split rolling-sliding bearing part's maximum deformation of Y direction in thermal-structure coupled conditions more than no thermal load conditions and so are fastening collars and bolts of X direction.Comparison results show that thermal load has no obvious influence on the stress of split rolling-sliding bearing components,but has a significant effect on the deformation,therefore,the thermal load and the structural load together lead to the deformation of split rolling-sliding bearing.