Finite Element Analysis Of Cylindrical Roller Bearing With Defects

In the process of cylindrical roller bearing design and analysis, vibration, fatiguedamage, the load carrying capacity, life expectancy and noise, etc. problems areclosely related to bearing contact stress distribution. Therefore, through the contactanalysis, a good grasp of the bearing contact surfaces’ stress distribution provides theeffective theoretical basis for improving the load carrying capacity and reliability ofbearing system，design and processing techniques.Based on the finite element software ANSYS, this paper studies the study ofinterval of arc modification length of cylindrical roller using ANSYS, contact stressanalysis of cylindrical roller with logarithmic curve generatrix of convexity excursion,analysis of contact stress between cylindrical roller and outer ring raceway with tapererror using ANSYS, analysis of contact stress between cylindrical roller and outer ringraceway with taper error and logarithmic curve generatrix of convexity excursionusing ANSYS, effects of misalignment in cylindrical roller bearings on contactbetween roller and inner ring, effects of rotating in cylindrical roller bearings oncontact between roller and inner ring. Firstly, this paper establishes the statics finiteelement model of the maximum load-bearing cylindrical roller and makes acomparison with the results of hertz theory, which shows that the analysis results offinite element method meet practical engineering needs. Then, this paper establishesthe finite element models of cylindrical roller and outer ring raceway with defects,aiming to make a comparison with the contact stress of normal bearing. Last, thispaper establishes the finite element models of cylindrical roller bearings with differentdefects to study what influences the change of defects have on the contact stress.The results of the contact stress of the roller are obtained by finite elementanalysis. Under the condition of the given load, the range of values the length of thearc modification should be controlled1.3~2.3mm for the cylindrical roller, theconvexity excursion of the logarithmic curve generatrix of the roller of cylindrical roller must be controlled within a appropriate range, such as0.4mm, the outer racewayof taper size of the cylindrical roller with the logarithmic curve generatrix should becontroled under the0.004mm, the taper error and logarithmic curve generatrix ofconvexity excursion must be controlled within a appropriate range, in turn, such as0-0.002mm and0.2mm for the cylindrical roller bearing, the misalignment of rollerwith the logarithmic curve generatrix should be controlled in an appropriate range,such as0-0.02-degree, the rotation of roller with the logarithmic curve generatrixshould be controlled in an appropriate range, such as0-0.082-degree.In this paper, the simulation based on the finite element analysis visually revealsthat: as the defects changes, the contact stress between the roller and inner and outerring raceway will also change. Especially, when the defects increases to a certain size,the contact stress between the roller and inner and outer ring raceway will increasesconsiderably, which will seriously affects the use of the bearing performance and life.