The Basic Research On The Effect Of Groove Shape Error Of Cylindrical Roller Bearing On Mechanics Performance

Rolling bearing is the foundation and backbone industry of machinery industry,which often restricts the related mechanical industry of a country's level of development.But no matter how advanced manufacture technology,elastic contact between raceway and roller during operation as well as the geometric error of bearing components will cause vibration and noise.The purpose of this paper is to analyze the effect of geometric errors on bearing performance.the results of the study is of great significance to the design and manufacture of bearing.In this paper,the cylindrical roller bearing as the research object,using the established finite element model of shaft and bearing assembly,analysis the magnitude of interference,error,roundness error and error combination on bearing performance influence.The results show that the error of angle and amplitude error of position angle deviation;shaft shape error influences the deformation amplitude of inner ring road,the deflection angle relative to the inner ring shaft will affect the error location in the inner ring;the error is 2.5 ?m,the inner ring raceway deformation trend close to a straight line;when the amount of interference is small,the rolling element and the inner ring raceway to contact and there is no deformation.Therefore,the performance of the bearing can not be affected when the error is satisfied.The form of Fourier series simplified the raceway outline,described in a discrete number of each rolling element geometry size error,according to the contact condition between components,each roller equivalent to two spring,considering the support structure deformation,setting up the load distribution and mechanical model,using the method of Newton-Raphson iteration to solve the nonlinear equations,analysis the effect of roundness error and rollers size error of cylindrical roller bearing on load distribution.Results show that the error is a single roller,away from the bearing area has little impact on the properties of bearing,0 roller had the greatest influence of contact load;multiple rollers exist error,the position of bearing roller will not change the number of roller loads,the order of different roller and raceway roundness error will change the number of roller loads;at 0 location roller,raceway amplitude error has less effect on the contact load and deformation;the results show that the raceway geometry error and roller size satisfy a certain relationship can be optimized load distribution.The research results of this paper have important theoretical significance and engineering application value to improve the design,manufacture,use and maintenance of the bearing.