Research On Modification Technology For Tapered Roller Bearing Of Automobiles

Tapered roller bearings widely used are adopted as the research object in this paper. The movements of components and the force analysis of taper roller bearings are introduced. Thus, their load distributions are obtained and the formula of fatigue life is deduced. Computer language named VB is used to edit the program for calculating their fatigue life. Therefore, the calculation efficiency of the fatigue life is improved for tapered roller bearings.The derivation process of the Hertz line contact theory is introduced and the dynamics simulation using the software named ADAMS is adopted to simulate the tapered roller bearings under various loads. After contact parameters and constraints are set up correctly, the contact load distributions under different loads are obtained. It can be concluded from the contact load distributions that the numbers of the loaded rollers and the maximum contact loads of the rollers are different, when the ratio of radial load to axial load is changed.Stress is one of the key factors affecting the life of tapered roller bearings. A large number of research shows that the bearing life is in inverse proportion to the7power of stress. The relevant design parameters of the bearings should be optimized and designed in order to make the bearings have a better performance, reduce the load stress, and prolong the service life of bearings. Finite element analysis software named ABAQUS is introduced to optimize the tapered roller bearings. A conclusion is drawn from the optimization results that the straight generatrix tapered roller bearings have "edge effect" which affects the service life of bearings. For the sake of reducing the end effect of stress concentration, the logarithmic modification of the rollers is performed. For increasing make the generality of results, the tapered roller bearings with different load conditions are implemented the logarithmic modification. The optimum modification amounts for different loads are acquired. Besides, the load adaptability problem in the same modification amount is analyzed.The internal load and the internal stress of tapered roller bearings are analyzed comprehensively using the3D design software named PRO/E, the dynamics simulation software named ADAMS, and finite element analysis software named ABAQUS. The design scheme is optimized which provides the theoretical basis for the product design of tapered roller bearings. The product development cycle is shorten for the tapered roller bearings. Research results of this paper have the reference significance for the study of other bearings.