| Rolling bearing has a small friction coefficient, high precision, etc,and it’s widelyused in various kinds of machine.The mechanical model based on the kinematics andmechanics analysis of high-speed rolling bearing is established. According to the actualdifferent working condition, the mechanical model of high-speed rolling bearing underthe pure axial load and combined load are established separately, then the contact angleand contact stress between the rolling element and the inner and outer ring arecalculated. The calculation results show that under pure axial load, the contact anglebetween the rolling element and inner ring increases with the increase of rotate speed,while that between the rolling element and outer ring decrease; under combined load,the increase of axial load can make the distribution of load in bearing tend to uniform.At the same time, the mechanical model is solved by genetic algorithm, and comparedwith the result of traditional Newton-Raphson algorithm. The results shows that geneticalgorithm can simply and effectively solve the mechanical model and provide a newmethod for the numerical solution of high-speed rolling bearing.Combined with numerical simulation， the temperature and vibration of rollingbearing under different load and rotate speed are measured and analyzed by using theaircraft engine spindle bearing testing machine. Rules are as follows, under the certainload, temperature of bearing rises constantly with the increase of rotate speed, and thefaster temperature of tested bearing rises, the slower that of back-up bearing rises; underthe certain rotate speed, the increase of load make the temperature of bearing risesignificantly.Through the numerical simulation and experimental research of high speedrolling bearing, we can get a series of important conclusions, and they have guidingsignificance to the actual production。... |
