行星滚柱丝杠副载荷分布规律研究

model for calculating load distributions of threads in Planetary Roller Screw Mechanism (PRSM) with different installations is developed, in which the shaft stiffness, thread stiffness and contact stiffness of screw, rollers and nut in PRSM are taken into consideration. The proposed model is verified in comparison with an existing model. The effects of installations on the load distributions over threads are studied thoroughly. The results show preliminarily that: (1) The main factors which affect the load distribution are material parameters, structural parameters and installation; (2) The accumulative axial deformations of screw and nut are the main reasons which cause the uneven distribution of loads acted on threads.