Load Analysis and Research of Planetary Roller Screw considering Tooth Angle error

in order to study the influence of error on the performance of planetary roller screw, the tooth profile angle error which has great influence on axial clearance is selected as the research object, and the spiral surface equation of each part is established according to the principle of spatial meshing. based on Hertz contact theory, elastic-plastic deformation theory and deformation coordination principle, the load distribution model of planetary roller screw considering tooth angle error is obtained. The load distribution before and after considering the tooth profile angle error is analyzed by ABAQUS. The results show that the tooth profile angle error will affect the axial clearance of the planetary roller screw pair and increase the non-uniformity of the load distribution of the whole system, but the trend of load distribution at both ends of the roller is not affected. This study provides a basis for the application of planetary roller screw in engineering practice.