A novel static model of planetary roller screw mechanisms based on an energy method

IF 1.8 4区工程技术 Q3 ENGINEERING, MECHANICAL Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science Pub Date : 2024-09-04 DOI:10.1177/09544062241271630

Bohong Zhang, Mingcai Xing, Yi Cui, Qiangqiang Huang, Bin Li, Shuo Liu

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Abstract

A novel static model of planetary roller screw mechanisms (PRSMs) is proposed to obtain the load distribution over threads by an energy method. The energy method consists of the structural potential energy and an optimization problem. The potential energy is calculated by structural discretization. And the optimization problem, whose objective is the structural potential energy, is obtained by combining the principle of minimum potential energy with the forces balance constraints. The load distribution is the result of the optimization problem. A finite element model is established for validation. Compared with previous models, the proposed model has lower complexity and higher precision. To further verify the reliability and practicability of the proposed model, effects of the nut position, shaft diameter, and number of roller threads on the load distribution are analyzed based on the proposed model. The results show that the nut position has little influence on the load distribution. The shaft diameter and number of roller threads significantly impact the load distribution.

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基于能量法的行星滚柱螺旋机构新型静态模型

本文提出了一种新型行星滚柱螺旋机构（PRSM）静态模型，通过能量法获得螺纹上的载荷分布。能量法包括结构势能和优化问题。结构势能通过结构离散化计算得出。优化问题的目标是结构势能，通过结合最小势能原理和力平衡约束得到。荷载分布是优化问题的结果。建立了一个有限元模型进行验证。与之前的模型相比，所提出的模型具有更低的复杂度和更高的精度。为了进一步验证所提模型的可靠性和实用性，基于所提模型分析了螺母位置、轴直径和滚柱螺纹数对载荷分布的影响。结果表明，螺母位置对载荷分布的影响很小。轴直径和滚柱螺纹数对载荷分布的影响很大。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 工程技术-工程：机械

CiteScore

3.80

自引率

10.00%

发文量

625

审稿时长

4.3 months

期刊介绍： The Journal of Mechanical Engineering Science advances the understanding of both the fundamentals of engineering science and its application to the solution of challenges and problems in engineering.