共查询到20条相似文献,搜索用时 171 毫秒
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针对国内某钢厂中板矫直机支承辊用调心滚子轴承出现抱死而频繁停机的问题,对轴承进行了拆解,介绍了轴承失效的情况.结合支承辊的应用工况,得到结论:轴承失效的主要原因是过大的轴向力.鉴于此,提出了多项优化措施,包括改用CC型结构调心滚子轴承;正确安装支承辊,控制支承辊位置偏差;增加轴承座刚度,降低振动;以及其他降低轴向力的措... 相似文献
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本文介绍了一种车轮支承装置以及圆锥滚子轴承。在圆锥滚子轴承的内外套圈间有密封装置,由于密封装置与轴承为一体,使整个支承装置易安装,结构紧密。 相似文献
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在参阅大量文献和实际研究实践的基础上,对汽车驱动后桥减速器小齿轮支承圆锥滚子轴承应用现状进行了综述,讨论了当前应用圆锥滚子轴承支承结构存在的不足和今后结构改进的方向。 相似文献
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交叉滚子轴承滚子与滚道间隙的测量长沙重型机器厂唐云龙交叉滚子轴承主要用于单斗挖掘机、门座起重机、塔式起重机和斗轮式堆取料机等设备作为回转支承部件,其结构形式见图1。交叉滚子轴承(以下简称轴承)组装后,外齿圈1及上下内圈2、3与滚子4接触处均为圆环滚道... 相似文献
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朱孝录 《机械工人(冷加工)》1999,(6):42-44
在第5讲中已叙述滚动轴承的失效形式、形貌和一般的分析方法,本讲举一个实例来作进一步的具体说明。 1.滚动轴承的失效情况 我国某高速线材厂精轧机主传动增速箱是从国外某公司引进的重要设备。增速箱的机构简图如图1所示。由图可见,大、中、小三个齿轮轴系都由滚动轴承支承。其中圆柱滚子轴承承受径向负荷, 相似文献
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从弹性复合滚子轴承的基本结构形式出发,结合当前关于实心圆柱滚子轴承和空心圆柱滚子轴承的研究方法,对弹性复合圆柱滚子轴承的静态径向刚度进行了深入细致的研究,用ABAQUS软件建立了弹性复合圆柱滚子轴承径向刚度的有限元计算模型,分析了填充度、外载荷、滚子数对径向刚度的影响规律,并和空心圆柱滚子轴承的刚度进行了比较。计算结果表明:填充度越小,随着外载荷的增大刚度的提升幅度越大,滚子数的增加对轴承的刚度提升幅度越大;填充度越大,随着外载荷的增大刚度的提升幅度越小,滚子数的增加对轴承的刚度提升幅度越小。弹性复合圆柱滚子轴承和空心圆柱滚子轴承比较时,填充度(空心度)越大,两者的刚度相差越大。 相似文献
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The purpose of this article is to numerically investigate one source of acoustic noise in roller bearings, that which results from the motion of the rollers in the bearing under zero external load. For the sake of simplification, it was assumed that the cylindrical roller bearings are infinitely long. Furthermore, the effects of the following on the noise of the bearing were also examined: the radial clearance of the bearing, the viscosity of the lubricant, and the number of rollers. The results of the study show that the fundamental frequency of the noise components of the cylindrical roller bearing corresponds to the multiplication of the number of rollers and the whirling frequency of the roller center. The acoustical frequency spectra of the cylindrical roller bearing are pure tone spectra, containing the fundamental frequency of the roller bearing and its superharmonics. The factors that decrease the sound pressure level of a cylindrical roller bearing include low lubricant viscosity, high radial clearance, and a reduced number of rollers. The results and discussions of the present article could aid in the design of low-noise cylindrical roller bearings. 相似文献
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Laser Doppler vibrometry is presented as an effective inspection technique for contour mapping of defects on precision roller bearing balls. Localized defects are characterized by measuring the Doppler shift of a laser beam incident on a rotating ball. Contour maps are obtained by scanning the ball at equally spaced azimuths with the laser beam as the ball rotates about a vertical axis. A technique for characterizing the repeatable runout of a ferrofluid spindle is discussed. Tests were performed on two different grades of ceramic ball bearings. With the experimental setup, a height resolution of 5.5 nm could be attained. Defects of 22 μm in width could be detected. Use of the contour mapping technique greatly enhances visualization of defects on ball bearing surfaces. 相似文献
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The roller profile plays a key role in the overall performance of roller bearings. In traditional profile design for roller bearings, the roller profile was often analyzed in terms of the bearing performance, particularly the fatigue life. However, the bearing dynamic stiffness and fatigue life were seldom considered simultaneously in the design of Tapered roller bearings (TRBs). Among the available roller profiles, the partially crowned roller profile has been acknowledged as one of the best from the viewpoint of the bearing fatigue life and stiffness characteristics. This paper presented a design optimization for the partially crowned roller profile to improve the performance of TRBs. Two profile parameters of rollers employed for TRBs including the central flat length and crown radius were investigated. The optimal design parameters for the roller profile were obtained in consideration of both bearing fatigue life and stiffness. The proposed design approach was useful and applicable for further geometrical optimization, manufacturing, and engineering application of rolling bearings. 相似文献
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高速滚动轴承的动力学分析 总被引:7,自引:0,他引:7
在高速轻载的工况条件下,打滑引起的接触表面损坏(如打滑切伤或擦伤)已成为高速滚动轴承的主要失效原因。本文根据牛顿运动定律,建立了滚动轴承动力学模型,分析了轴承元件间的相互作用和滚动轴承的有关动力学特性。利用本文所编制的软件,对滚子的公转和自转转速及保持架转速进行了动态模拟,分析了滚子和保持架的打滑,得到了与实际相符的结果 相似文献
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飞轮储能磁轴承系统结构及其悬浮特性 总被引:1,自引:2,他引:1
介绍了一种由径向永磁轴承与电磁推力轴承组成的单轴主动控制的飞轮储能磁轴承系统结构 ,径向永磁轴承提供径向恢复力与轴向悬浮力 ,电磁推力轴承提供轴向恢复力。并对系统的结构参数计算及其磁悬浮特性进行了分析与讨论。研究结果表明 ,永磁轴承动、静磁环轴向位移对系统承载力与刚度有明显影响 ,采用多对磁环永磁轴承 ,有利于提高系统承载力与径向刚度 相似文献
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无预负荷空心圆柱滚子轴承空心度的优化设计 总被引:5,自引:0,他引:5
根据接触力学理论,对空心滚子轴承进行了三维有限元分析,在此基础上对空心滚子轴承的空心度进行了优化设计,为最大限度地发挥空心滚子轴承的优势和空心滚子轴承的设计提供参考。 相似文献