汽车轮毂双列圆锥滚子轴承动力学仿真分析

发布时间：2018-07-03 06:56

本文选题：汽车轮毂轴承 + 双列圆锥滚子轴承　；参考：《河南科技大学》2014年硕士论文

【摘要】：随着汽车产业的不断发展，汽车轮毂轴承越来越多地采用双列圆锥滚子轴承。汽车轮毂双列圆锥滚子轴承逐渐成为人们关注的焦点，其动力学特性直接影响着汽车轮毂单元的综合性能。本文的研究对象是用于汽车轮毂中的双列圆锥滚子轴承，在滚动轴承动力学和多体动力学接触理论的基础上，考虑了圆锥滚子的偏斜、滚子和保持架的打滑、轴承内部的摩擦和润滑等因素，并结合汽车轮毂轴承的实际使用工况，对轮毂轴承内部各零件间的相互作用和运动特性进行分析。通过ADAMS软件和Fortran语言建立了汽车轮毂双列圆锥滚子轴承动力学分析模型，采用精细积分法和预估-校正Adams-Bashforth-Moulton多步法相结合的算法，对轴承动力学模型进行求解，并开发了汽车轮毂双列圆锥滚子轴承动力学分析软件。以某型号汽车轮毂双列圆锥滚子轴承为例，进行了汽车轮毂双列圆锥轴承的摩擦功耗和振动特性的理论分析并加以试验验证。研究结果表明：1轮毂轴承的疲劳寿命随初始轴向预紧量的增加呈先升高后降低的趋势，轮毂轴承安装时有一最佳初始轴向预紧量；径向载荷的增加使最佳初始轴向预紧量取值变大；2轴承摩擦功耗随着大挡边倾角、滚子数的增加而增加，随滚子球基面半径的增大而减少；3轴承摩擦功耗随着径向载荷、侧向载荷比、倾覆力矩以及轴承转速的增加而增加；4轴承振动值随着初始轴向预紧量、滚子球基面半径以及保持架兜孔间隙的增加呈先减小后增大的趋势，故合理选取这些参数有利于汽车轮毂轴承的减振降噪；5随着滚子数的增加，轴承振动值亦增加，当滚子数增加到一定数量，轴承振动值趋于稳定；6径向载荷、侧向载荷比以及倾覆力矩的增加使轴承振动值会有不同程度的增加。其中，径向载荷对轴承振动影响较大；7轴承振动值随着轴承转速的增加先增大后减小。当轴承转速达到轴承临界转速时，轴承振动出现峰值。
[Abstract]:With the development of automobile industry, double row tapered roller bearings are used more and more. The double row tapered roller bearings of automobile wheels have gradually become the focus of attention, and their dynamic characteristics have a direct impact on the comprehensive performance of automobile hub units. The object of study in this paper is double-row tapered roller bearings used in automobile wheels. On the basis of the dynamic contact theory of rolling bearings and multi-body dynamics, the deflection of tapered rollers, the skidding of rollers and cage are considered. The internal friction and lubrication of the bearings and the actual operating conditions of the automobile hub bearings are used to analyze the interaction and motion characteristics of the internal parts of the hub bearings. Based on Adams software and Fortran language, the dynamic analysis model of automobile hub double-row tapered roller bearing is established. The dynamic model of bearing is solved by the combination of precise integration method and predictor-correction Adams-Bashforth-Moulton multi-step method. The dynamic analysis software of double row tapered roller bearings for automobile wheels is developed. Taking the double-row tapered roller bearings of automobile hub as an example, the friction power consumption and vibration characteristics of the double-row tapered bearings are analyzed and tested. The results show that the fatigue life of the hub bearing increases first and then decreases with the increase of the initial axial preload, and there is an optimum initial axial preload when the hub bearing is installed. With the increase of radial load, the friction power consumption of the bearing increases with the increase of the angle of inclination and the number of rollers, and decreases with the increase of the radius of the base surface of the roller ball, and the friction power consumption of the bearing decreases with the radial load with the increase of the radius of the base surface of the roller ball. With the increase of lateral load ratio, overturning moment and bearing rotational speed, the vibration value of the bearing increases with the initial axial preload, the radius of the roller ball base and the gap of the cage pocket decrease first and then increase. Therefore, the reasonable selection of these parameters is beneficial to the vibration reduction and noise reduction of automobile hub bearings. With the increase of roller number, the bearing vibration value also increases. When the number of rollers increases to a certain number, the bearing vibration value tends to stabilize the radial load. With the increase of lateral load ratio and overturning moment, the vibration value of bearing will increase in varying degrees. The radial load has a great influence on bearing vibration. The vibration value of bearing increases first and then decreases with the increase of bearing speed. When the speed of the bearing reaches the critical speed of the bearing, the vibration of the bearing appears the peak value.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U463.343;TH133.3

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