滚珠丝杠推杆载荷分布优化效果的数值研究

IF 4.5 1区 工程技术 Q1 ENGINEERING, MECHANICAL
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引用次数: 0

摘要

滚珠丝杠的载荷分布不均匀,导致滚珠沿螺母的接触载荷不平衡。这种不均匀性会对滚珠丝杠的刚度、精度和使用寿命产生负面影响。本研究提出了一种解决方案,通过优化模型和两种实施方法来减少滚珠丝杠载荷分布的不均匀性:变螺距方法和滚珠偏移方法。这两种方法都涉及在螺母的某些区域施加初始预紧力,以补偿载荷不平衡。一项案例研究对这两种方法进行了测试,并对实施优化模型的影响进行了评估。结果证实,该模型能够减少载荷分布的不均匀性,比率改善高达 61%。此外,这种优化还能将刚度提高 78%,将使用寿命延长 17 倍。研究还确定了模型的局限性和可能产生的不利影响,并得出结论:在优化过程中必须考虑具体情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Numerical study on the effectiveness of the optimization of the load distribution in ball screw actuators

Numerical study on the effectiveness of the optimization of the load distribution in ball screw actuators

Load distribution in ball screws is characterized by non-uniformity, leading to imbalances in the contact load of the balls along the nut. This non-uniformity negatively impacts the stiffness, accuracy and service life of the ball screw. This work proposes a solution to reduce the ball screw load distribution non-uniformity through an optimization model and two implementation methods: the variable pitch method and the ball offset method. Both methods involve applying an initial preload in certain areas of the nut to compensate for load imbalance. A case study tests both methods and evaluates the implications of implementing the optimization model.

Results confirm the model’s ability to reduce the load distribution non-uniformity, with a ratio improvements up to 61%. Additionally, this optimization enhances stiffness by up to 78% and extends service life by up to 17 times. The study also identifies the model’s limits and possible adverse effects, concluding that the specific case conditions must be considered in the optimization process.

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来源期刊
Mechanism and Machine Theory
Mechanism and Machine Theory 工程技术-工程:机械
CiteScore
9.90
自引率
23.10%
发文量
450
审稿时长
20 days
期刊介绍: Mechanism and Machine Theory provides a medium of communication between engineers and scientists engaged in research and development within the fields of knowledge embraced by IFToMM, the International Federation for the Promotion of Mechanism and Machine Science, therefore affiliated with IFToMM as its official research journal. The main topics are: Design Theory and Methodology; Haptics and Human-Machine-Interfaces; Robotics, Mechatronics and Micro-Machines; Mechanisms, Mechanical Transmissions and Machines; Kinematics, Dynamics, and Control of Mechanical Systems; Applications to Bioengineering and Molecular Chemistry
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