不同预紧力下热变形对高速主轴单元动态特性影响的综合研究

IF 4.5 1区工程技术 Q1 ENGINEERING, MECHANICAL

Mechanism and Machine Theory Pub Date : 2024-10-30 DOI:10.1016/j.mechmachtheory.2024.105820

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引用次数: 0

摘要

本文基于多自由度（M-DOF）有限元和二维瞬态热网络方法，综合考虑支撑球轴承和转子的径向耦合变形，提出了一种新型的高速主轴-轴承系统热机械耦合模型，并讨论了温升和热变形对其动态特性的影响。然后设计了一种非接触式电磁加载装置，用于测试液压变预载实验主轴系统的动态幅频响应。研究表明，提出的热机械耦合模型计算结果与主轴系统的实验结果高度一致，温升和热变形对其机械行为有重要影响，恒压预紧机构下高速主轴的线性共振频率持续上升，直至系统达到热平衡状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A comprehensive study of the effect of thermal deformation on the dynamic characteristics of the high-speed spindle unit with various preload forces

In this paper, based on the multi-degree-of-freedom (M-DOF) finite element and 2-dimensional transient thermal network methods, a novel thermo-mechanical coupling model of the high-speed spindle-bearing system by comprehensively considering the radial coupling deformations of supporting ball bearings and rotor is proposed, and the effects of the temperature rise and thermal deformation on its dynamic characteristics are discussed. Then a non-contact electromagnetic loading device is designed to test the dynamic amplitude-frequency response of a hydraulic variable preload experimental spindle system. The studies show that, the results calculated by proposed thermo-mechanical coupling model are highly consistent with the experimental results of the spindles system, and the temperature rise and thermal deformations have an important influence on its mechanical behavior, and the linear resonant frequency of the high-speed spindle under the constant pressure preload mechanism continues to increase until the system reaches its thermal equilibrium state.

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来源期刊

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