A multi-roller static model of the planetary roller screw mechanism considering load sharing

Xiaojun Fu, Xin Li, Shangjun Ma, David Gerada, Geng Liu, Christopher Gerada

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)

Abstract

A multi-roller static model is proposed to calculate load sharing and load distribution in a planetary roller screw mechanism (PRSM) with axial loads and errors. Taking into the actual positions of rollers, the PRSM is discretized into a multi-roller spring system. The proposed model is validated by comparing the results from a finite element model. The load sharing, load distribution and elastic deformation behaviors of a PRSM under different part position errors and thread index errors are analyzed. The results show that load sharing is sensitive to the position errors of the screw and nut while being fairly insensitive to those of rollers. Part position errors and thread index errors have a great influence on the stiffness of the PRSM.

Original languageEnglish
Article number107648
JournalTribology International
Volume173
DOIs
Publication statusPublished - Sep 2022

Keywords

  • Axial clearance
  • Elastic deformation
  • Load sharing
  • Planetary roller screw mechanism

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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