浅析滚动轴承在磨机主轴承中的应用

针对工业中使用较多的磨杌主轴承，介绍了磨机主轴承的分类，并进行比较，重点介绍采用滚动主轴承的特点、应用成果及设计要点。指出滚动轴承代替滑动轴承是一大进步，有广阔的发展空间。     

滚动轴承自动检装置设计

在S0910轴承加速度测振仪的基础上,设计了滚动轴承自动检测装置,可实现轴承的自动化检测,提高了检测精度及效率,减轻了工人劳动强度。     

铁路货车滚动轴承压装机液压系统

介绍了铁路货车滚动轴承压装机的机械结构,在压装工艺流程的基础上,设计了压装机的液压系统并详细阐述了其工作过程,实现了21t轴重及25t轴重轮对轴承的压装任务,达到了预定的目的。     

铁路货车滚动轴承退卸系统设计

介绍了货车轮对轴承退卸机的工作原理,根据退卸工序设计了退卸机液压系统,采用PLC为下位机、PC为上位机的模式实现了退卸机监控系统的设计,介绍了退卸机PLC控制系统及监控系统组态界面.     

铁路货车滚动轴承加载磨合机的研制

为适应铁路货车高速重载的要求,对自行研制的货车滚动轴承加载磨合机的原理、总体方案、主要技术参数和技术特点做了介绍。该磨合机提高了货车轮对的检修质量,具有较突出的优点,将对确保列车的运行安全发挥重要作用。     

新型固定式铁路货车滚动轴承压退机的研制

现铁路货车轴承已实现了滚动轴承化,铁路货车厂段修时,需对滚动轴承进行压退(将滚动轴承从轮对上退缷下来)、分解检查及检修。现依据铁路货车滚动轴承检修技术标准要求,研制了滚动轴承压退机,可用于RD2、RD2A,RE2A、RE2B等货车轮对轴承,以及25 t轴重、紧凑型滚动轴承的退卸工作。该滚动轴承压退机以液压系统为动力,采用PLC控制,可同时压退轮对两端的2个轴承,亦可单独压退一端1个轴承。具有自动化程度高、劳动强度低、效率高、不损伤轴承及附件等优点。完全能满足铁路工厂、车辆段检修滚动轴承的工艺要求。     

基于C均值算法的货车滚动轴承诊断系统

为了实现铁路机车车辆轮对滚动轴承不解体的现场检修，设计了一种基于C均值算法便携式滚动轴承诊断系统，阐述了基于C均值算法的诊断原理、诊断系统的整体设计与结构。软件采用C＋＋Builder开发，基于MS Access数据库，讨论了数据实例模块的表达，采用按采集时间和列车编号的查询方式，对货车滚动轴承进行了现场试验，给出保持架断裂典型故障信号故障实例。结果表明其应用于现场稳定可靠，采集诊断速度快，能准确检测出常见轴承故障，满足现场实时性要求。     

铁路货车滚动轴承退卸机液压系统

介绍了铁路货车滚动轴承退卸机的机械结构,在退卸工艺流程的基础上,设计了退卸机的液压系统并详细阐述了其工作过程,实现了21t轴重及25t轴重轮对轴承的退卸任务,达到了预定的目的。     

250B轴承环扩孔机改造初探

经过对设备的滑动导轨、汽缸尺寸及结构、碾压宽度、传动轴结构等部分进行改造,使该设备的结构更加合理,加工范围增加,降低成本,故障率低,使用寿命延长。     

滚动轴承CAPP系统的探讨

介绍CAPP系统、滚动轴承CAPP系统的组件及工艺设计的实用性。     

Friction reduction in rolling bearing by using polymer additives

The friction torque on the outer ring of a tapered roller bearing has been experimentally measured for a mineral oil (base oil), as well as for samples of the base oil additived with low‐density polyethylene. The data show an important reduction of friction by introducing the polymer into the base oil due to the film formed by the adsorption of macromolecular coils on the solid surface. The effectiveness of macromolecular additive contribution to friction behaviour is described in terms of polymer efficiency, which shows maximum values at low polymer concentrations. Copyright © 2009 John Wiley & Sons, Ltd.     

非标准滚动轴承CAD的研究

本文对标准轴承和非标准轴承的设计方法进行了分析比较,阐述了非标准轴承采用CAD系统设计的必要性,介绍了用VB6.0开发非标准轴承CAD系统的方法。     

滚动轴承经常发生的质量问题及改进措施

针对检查中遇到的一些共性质量问题,提出了相应的解决措施,保证了轴承的质量。     

减少滚动轴承车加工留量的分析与实践

实验分析滚动轴承车工各工序留量的减少,通过调整磨工工艺来提高劳动生产率。     

基于神经网络的滚动轴承振动预测

以神经网络与MATLAB实现理论为依据,提出了一种新的滚动轴承振动预测方法。这种方法根据轴承的加工质量试验数据,建立轴承振动预测的BP网络试验模型,在MATLAB开发环境下输入训练样本数据矩阵和目标矩阵。经过训练后,网络误差达到要求,预报结果的最大相对误差小于10％。     

基于VisualBasic平台的滚动轴承额定载荷计算

滚动轴承的额定载荷关系到轴承的承载能力及寿命，在设计、生产、选用轴承的过程中，都占据重要的地位。而欲得到该数值，则需经过查标准、带公式、查表格等一系列繁琐而易错的过程。使用VisualBasic语言软件将此过程开发为自动程序，则可准确、快捷地得到滚动轴承额定载荷的数值。     

小波消噪在滚动轴承故障诊断的应用研究

滚动轴承振动信号容易受到随机噪声的污染,如何去噪成为滚动轴承故障诊断的关键问题之一。而传统的消噪方法可能会将信号中一些能量小的有用信号当作噪声消除,本文即提出一种改进的小波消噪方法,并用仿真信号和实测滚动轴承振动信号对额方法和传统消噪的方法进行性能比较。结果表明,在消噪方面,小波消噪能更好地提高信噪比,为进一步故障诊断决策提供了可靠的依据。     

Nonlinear vibration induced by the water-film whirl and whip in a sliding bearing rotor system

Many industrial applications and experiments have shown that sliding bearings often experience fluid film whip due to nonlinear fluid film forces which can cause rotor-stator rub-impact failures. The oil-film whips have attracted many studies while the water-film whips in the water lubricated sliding bearing have been little researched with the mechanism still an open problem. The dynamic fluid film forces in a water sliding bearing are investigated numerically with rotational, whirling and squeezing motions of the journal using a nonlinear model to identify the relationships between the three motions. Rotor speed-up and slow-down experiments are then conducted with the rotor system supported by a water lubricated sliding bearing to induce the water-film whirl/whip and verify the relationship. The experimental results show that the vibrations of the journal alternated between increasing and decreasing rather than continuously increasing as the rotational speed increased to twice the first critical speed, which can be explained well by the nonlinear model. The radial growth rate of the whirl motion greatly affects the whirl frequency of the journal and is responsible for the frequency lock in the water-film whip. Further analysis shows that increasing the lubricating water flow rate changes the water-film whirl/whip characteristics, reduces the first critical speed, advances the time when significant water-film whirling motion occurs, and also increases the vibration amplitude at the bearing center which may lead to the rotor-stator rub-impact. The study gives the insight into the water-film whirl and whip in the water lubricated sliding bearing.