共查询到20条相似文献,搜索用时 46 毫秒
1.
本文介绍了一种深沟球轴承用球形兜孔实体保持架,该结构保持架采用滚动体引导方式,引导更精确,且可大大改善轴承的润滑性能,保证轴承具有良好的运行状态,为轴承设计研究提供了一种新思路。 相似文献
2.
针对高速圆柱滚子轴承保持架在引导方式选用上存在分歧的问题,基于Adore建立了高速圆柱滚子轴承的仿真模型,分析了保持架在外引导和内引导方式下,滚子数量、径向游隙、保持架引导间隙和兜孔间隙对保持架打滑及运转稳定性的影响,并通过高速轴承打滑试验验证了仿真模型的可靠性。结果表明,在内圈旋转的情况下,内引导方式比外引导方式更有利于防止保持架打滑;内引导方式下,采用较小的轴承径向游隙和引导间隙可以降低保持架的打滑率,并提高其运转稳定性;兜孔间隙对保持架打滑几乎没有影响,但是随着兜孔间隙的增大,保持架运转稳定性变差。 相似文献
3.
4.
5.
基于Adams软件建立了考虑润滑作用的高速圆柱滚子轴承动力学模型,采用正交试验法对轴承结构参数进行了多目标优化设计,研究了不同工况及轴承结构参数对轴承保持架动态特性的影响。结果显示:内圈转速对保持架打滑率的影响最大,引导间隙对保持架打滑率的影响最小;引导间隙对保持架运转稳定性的影响最大,滚子个数对保持架运转稳定性的影响最小。经过优化设计获得了保持架打滑率及运转稳定性的轴承结构参数最佳组合。保持架打滑率随内圈转速及引导间隙的增加而增加,随径向载荷、滚子个数及径向游隙的增加而减小。保持架运转稳定性随内圈转速及引导间隙的增加而增强;随径向游隙的增加而降低;存在合理的径向载荷及滚子个数使保持架运转稳定性最好。 相似文献
6.
对滚动轴承保持架引导方式及其适用工况作了概要介绍,凝练了保持架引导方式的一般选用准则,重点对高速轴承中保持架引导方式的关键控制要素进行了阐述,给出了保持架引导面失效的解决对策,列举了不同保持架引导方式以及不同线膨胀系数材料保持架引导间隙设计等典型案例,形成了有关保持架引导方式的系统化知识。 相似文献
7.
8.
针对单由滚子引导的圆锥滚子轴承筐形保持架窗孔过长,轴向、径向窜动量大,造成轴承噪声和振动较大的问题,通过在内圈挡边与保持架之间压配1个消声环,利用滚子和内圈挡边共同引导保持架,有效地降低了轴承噪声。 相似文献
9.
为了解决微型轴承浪型保持架由于轴承力矩均匀性差,使用中常被卡死的问题,采用上下两半保持架压爪时留有一定间隙。使之轴向和径向可以自由活动的浮动议型保持架、其上下两半保持架工作时处于自由浮动状态,可以自动调整保持架与球之间的作用力;采用内圈外径引导,大大减少了载荷区内钢球和保持架作用力的变化幅值。附图7幅,表2个,参考文献4篇。 相似文献
10.
11.
通过有限元分析的方法,阐述了固定球阀球体的应力分布及变形情况,并对几个重要的设计参数作了进一步的灵敏度分析,提出了设计高磅级球体时应注意的问题. 相似文献
12.
Fujio Hirano 《摩擦学汇刊》2013,56(4):425-434
The author carried out an experimental investigation on the motion of a ball in an angular-contact ball bearing under thrust load by measuring change in magnetic flux induced by a magnetized ball. The observed data of the angular velocity of the ball and that of the cage were adequate for analyzing the kinematical condition in the bearing. It is noted that the ratios of the angular velocities of the rolling elements are closely related to the parameter zFe/Pa, where z, Fe and Pa denote the number of balls in the bearing, the centrifugal force acting on a ball and the magnitude of thrust load, respectively. In the range zFe/Pa > 0.1, the deviation of the observed data from the values theoretically predicted based upon a simple assumption neglecting the gyroscopic moment is remarkable. In order to explain the experimental results reasonably, it is necessary to consider the gyroscopic moment along with the effect of the centrifugal force. 相似文献
13.
14.
15.
The kinetics of the absorption of lubricating oils and moisture from air into porous polyimide, as well as the exchange of oil between porous polyimide retainers and oil baths or operating bearings, have been measured. Oil absorption into porous polyimide is much faster than into cotton-phenotic. Water is absorbed by oil-impregnated polyimide, but little or no oil is lost during the process. Oil is absorbed by air-equilibrated polyimide at a slower rate than by dry polyimide. Porous polyimide is much easier to impregnate with oil than cotton-phenolic, and is also much more tolerant, of storage in air once impregnated. Oil within a porous polyimide ball bearing retainer exchanges slowly with oil in a bath in which the retainer is placed. The exchange is due to diffusion of the oils, and the diffusion coefficient is determined to be 3 × 10?9 cm2/s for the oils used in these experiments. Oil is exchanged quickly between polyimide retainers and well-lubricated operating bearings. The exchange is faster than a diffusion process, and is probably driven by bearing action. In these experiments, the authors could detect no net gain or loss of oil from the retainer or the bearing parts. Only about one-half of the oil originally supplied to the parts is available to the retainer; the rest remains elsewhere in the bearing. 相似文献
17.
18.
针对数控机床滚珠丝杠副在实际使用中出现问题后用户的拆装、调整和装配等难题,从滚珠丝杠副的拆卸、安装、调节及日常维护方法等方面,做了详细的阐述。 相似文献
19.
20.