基于热结构耦合方法的圆柱滚子轴承热特性分析

IF 2.1 4区 工程技术
Chuanmeng Yang, Mengyu Zhu, Ming Qiu, Yishuang Chu, Yanfang Dong, Feifan Chen
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引用次数: 0

摘要

高速运转的轴承会产生大量热量,对机床进给系统的精度有很大影响。本文通过应用轴承拟静力学和局部热源法,综合考虑表面接触热阻和润滑油粘温特性的影响,采用热网络法确定轴系主要热特性参数,建立瞬态热平衡方程,在迭代过程中求得轴系温度场与变形的耦合;通过求解,得到轴承温度场和热特性参数的瞬态变化,分析工况和结构参数对轴承瞬态热特性曲线的影响;采用有限元法耦合现场模拟和试验台试验,验证理论模型的合理性。分析了工况和结构参数对轴承瞬态热特性曲线的影响。通过有限元法耦合现场模拟和试验台试验,验证了理论模型的合理性。经过深入分析发现:无论是初始游隙还是转速和载荷的变化,都会导致轴承热平衡温度的变化,并产生热诱导载荷。因此,通过选择合适的游隙、提高润滑剂的粘度、加强空气对流等措施,可以有效降低轴承的发热量和热变形,为轴承结构优化和热平衡设计提供了重要的方法支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermal characterization of cylindrical roller bearings based on thermal-structural coupling approach
High-speed running bearings generate a large amount of heat, which has a significant impact on the accuracy of machine tool feeding system. In this paper, by applying the bearing proposed statics and local heat source method, considering the combined surface contact thermal resistance and lubricant viscous temperature characteristics of the influence of the thermal network method to determine the main thermal characteristics of the shaft system parameters, the establishment of the transient thermal equilibrium equations, in the iterative process of the shaft system temperature field and deformation of the coupling; through the solution, the bearing temperature field and the transient change of the thermal parameters of the characteristics of the bearing, analyze the working conditions and structural parameters of the bearing transient thermal characteristics curve; using the finite element method coupled field simulation and test bed test, to verify the theoretical model is reasonable. The influence of working conditions and structural parameters on the transient thermal characteristic curve of the bearing is analyzed. The reasonableness of the theoretical model is verified by using the finite element method coupled field simulation and test bench test. After in-depth analysis: no matter the initial clearance or the change of rotational speed and load, it will lead to the change of thermal equilibrium temperature of the bearings, and will produce heat-induced load. Therefore, by choosing the appropriate clearance, improving the viscosity of lubricant, and enhancing the air convection, the heat generation and thermal deformation can be effectively reduced, which provides an important method to support the optimization of the bearing structure and the design of thermal balance.
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来源期刊
Advances in Mechanical Engineering
Advances in Mechanical Engineering Engineering-Mechanical Engineering
自引率
4.80%
发文量
353
期刊介绍: Advances in Mechanical Engineering (AIME) is a JCR Ranked, peer-reviewed, open access journal which publishes a wide range of original research and review articles. The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas, and encourages submissions which contribute novel and innovative insights to the field of mechanical engineering
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