滑动轴承摩擦系统动力学仿真研究

在分析了滑动轴承内部摩擦学系统和摩擦学系统过程的基础上,基于摩擦学系统方法构建滑动轴承内部的摩擦磨损动力学模型,对滑动轴承的摩擦磨损特性进行了研究,并通过仿真试验研究了轴承内部温升和热量之间的关系.试验结果表明仿真结果与理论模型计算结果相吻合.     

基于虚拟仪器的滑动轴承摩擦试验系统的设计

通过改造MS-800A四球摩擦试验机的摩擦实验部分,引入虚拟仪器LabVIEW软件建立测试系统,对摩擦副之间摩擦系数和温度的变化进行采集、处理和实时检测,建立对滑动轴承的摩擦磨损试验系统,从而建立一套研究滑动轴承在不同工况条件（润滑介质、载荷和转速）下的摩擦磨损特性。     

钻井液污染润滑脂对牙轮钻头轴承摩擦学性能的影响

高温或冲击载荷会引起钻井液泄漏进入复合锂基润滑脂,从而影响牙轮钻头滑动轴承润滑及摩擦磨损性能。采用MCR102旋转流变仪对含有不同质量分数钻井液的复合锂基润滑脂进行流变性测试,并采用MDW-1型摩擦磨损试验机开展牙轮钻头滑动轴承模拟工况下轴承单元摩擦学实验,研究钻井液质量分数对轴承摩擦磨损性能的影响。结果表明:钻井液的污染将降低润滑脂的黏度,改变润滑脂的流变性能;钻井液的污染总体上增大了滑动轴承单元摩擦因数及摩擦因数波动幅度,同时加大轴承的磨损,且在高转速下,润滑脂中较低含量的钻井液就会使滑动轴承单元的摩擦磨损达到最大值;钻井液中的超细碳酸钙和重晶石颗粒引起的磨粒磨损和犁沟效应,可能导致滑动轴承快速失效。     

活塞压缩机用滑动轴承的摩擦磨损与润滑分析

对滑动轴承中的磨损与摩擦进行了分析，提出了相应对策。     

涡旋压缩机中滑动轴承的特性

涡旋压缩机的性能在很大程度上取决于机器中滑动轴承的磨损条件与能量耗损。本文着重分析了滑动轴承的摩擦性能。对滑动轴承的工作条件作了讨论。除此之外，作者还介绍了滑动轴承材料与参数的选择。     

塑料滑动轴承工作性能分析

综述了塑料滑动轴承的摩擦和磨损行为，指出在金属与塑料滑动副中表在粗糙度对滑动行为有重要影响，产对塑料滑动轴承工作中出现的爬行现象提出了解决办法，可作为设计塑料滑动轴承的依据。     

滑动轴承摩擦性能试验研究及方法

摩擦是摩擦副(如滑动轴承副)的接触表面在相对运动时产生的相互阻碍作用。因此摩擦性能的好坏是评定滑动轴承的滑动性能和承载性能的一个重要指标。国外的技术资料显示,动压轴承仍然是当今世界应用和研究非常广泛的一种轴承形式。但是由于普通动压轴承在起动和停机的某瞬间总是会发生表面固体接触,从而产生磨损,因此当人们对滑动轴承材料或结构进行试验时,还特别对边界摩擦和混合摩擦感兴趣。也就是     

PTFE基三层滑动轴承材料与不同材料配副时的摩擦学特性

PTFE基三层滑动轴承复合材料与不同材料组成的摩擦副有着不同的摩擦学特性,研究这些摩擦副的摩擦学特性,对于优化摩擦副配副材料具有重要的实用价值。研究PTFE基三层复合材料与钢铁材料、有色金属以及聚合物材料进行配副时的摩擦磨损性能,通过扫描电镜观察磨损表面的微观形貌,分析不同摩擦副的摩擦磨损机制,并给出摩擦副配副的优选结果。结果表明:PTFE基三层滑动轴承材料与钢铁材料以及聚合物材料配副时,其磨损机制为剥层磨损,摩擦学性能较好;而与有色金属配副时,其磨损机制为黏着磨损,摩擦学性能较差。     

铁基滑动轴承材料研究进展

对铁基滑动轴承材料的发展进行综述,重点阐述了铁基滑动轴承材料的分类、性能特点及适用工况,给出了铁基滑动轴承材料常用润滑相和硬质颗粒增强相材料,详细讨论了硬质颗粒增强相和润滑相材料对铁基滑动轴承摩擦磨损等性能的影响及对应的磨损机理,分析了铁基滑动轴承材料的未来发展方向。     

径向滑动轴承金属磨损自修复实验机研制

基于通用摩擦磨损实验机设计思想,模拟边界条件下的径向滑动轴承,依据金属磨损自修复边界润滑状态下发生的特点,应用自主开发的润滑状态判断软件,研制了径向滑动轴承金属磨损自修复实验机。介绍了该实验机的设计原理及特殊功能,采用该实验机进行了自修复实验。实验结果证明,金属磨损自修复专用实验机能模拟实际工况润滑状态和工况载荷,具有实时监测摩擦副胶合和磨损失效瞬间状态,在线测量摩擦副温度、摩擦扭矩、振动加速度、试件转速及摩擦力等功能,并能实现急停,可用于金属摩擦磨损自修复保护膜生成机制的研究。     

Unbalance Response of a Super-Critical Rotor Supported by Foil Bearings—Comparison with Test Results©

This article compares theoretical and experimental results on the unbalance response of a super-critical rotor supported by two kinds of gas foil bearings. Analysis of the super-critical rotor is performed with viscoelastic foil bearings (VEFB) and conventional bump foil bearings and compared with early published experimental data. The vibration orbits obtained by theoretical investigation on the viscoelastic foil bearings (VEFB) and the conventional bump foil bearings are compared with the experimental vibration orbits of the super-critical rotor supported by both foil bearings. A numerical analysis program can calculate the static and dynamic characteristics of the elastically supported gas foil bearing using the measured stiffness and damping of the elastic foundation. After the stiffness and damping of both foil bearings are calculated using the perturbation method, vibration orbits of the flexible rotor modeled by the finite element method are calculated. Vibration orbits calculated by numerical analysis agree well with experimental data when the vibration amplitude is small and the rotating speed is below the bending critical speed. The numerical results also show that the enhanced structural damping of the elastic foundation reduces vibration near the bending critical speed.     

Experiments on the destabilizing factors in tilting pad bearings

Rotor systems with tilting pad bearings, may be unstable under normal working conditions due to destabilizing factors in the bearings. Theoretical and experimental results on the instability of tilting pad bearings are presented.     

Diagnostics of a linear electromagnetic suspension system for a rotor

A flexible vertical rotor on electromagnetic bearings is considered, with a view to selecting an experimental algorithm for determining the limits of the region with no collisions of the rotor and the safety bearings.     

Some aspects of rolling friction resistance in a complex tribological pair – the bicycle wheel bearing

Bicycles are an important means of transport — over 20 million are manufactured worldwide each year, and, because their source of motive energy is human, their energy conversion, as measured by their resistance to motion, is critical. The bearings used in bicycles are rolling bearings, but are normally of different materials and construction quality to the roller bearings used in other applications. The present paper is intended to provide an indication of the phenomena influencing the resistance to motion and loss of energy of these bearings, and is based on a rolling bearing test stand designed by the author. A mathematical model derived from experimental observation is presented, and the theoretical results compared with experimental results.     

用于滚动轴承故障检测与分类的支持向量机方法

介绍了支持向量机原理与算法，给出了基于支持向量机多类故障层次分类检测模型以及多类故障分类器构建方法及步骤。用滚动轴承实验数据对分类器的性能进行检验，并与神经网络分类器性能进行初步对比，结果证明了支持向量机方法用于轴承故障检测与识别的可行性和有效性。     

Comparison of slot-entry and orifice-compensated gas journal bearings

Controversy concerning the relative merits of gas journal bearings employing slot and orifice restrictors led to an experimental and theoretical study to determine the relative merits of the two types of bearing. This paper is an interim report on the programme and shows that slot-entry bearings yield greater load capacity at high eccentricity ratios, whilst orifice-compensated bearings have greater stiffness up to ? = 0.35.     

An experimental simulation of the tribology of large spherical roller bearings in paper machines

The spherical roller bearings, used to support the drier rolls in paper machines, experience premature failure in which external heating and water contamination of the lubricant have been implicated. An apparatus was designed, built and commissioned to simulate the conditions acting on these bearings. A pilot study was performed to examine the effect of the external heating on lubricant film thickness and ultimately on bearing failure. The amount of surface damage sustained by the test bearings increased as the estimated lambda parameter decreased. Furthermore, oil deposit formation was similar to that reported in the literature for drier roll bearings, thereby supporting the validity of the experimental simulation.     

改进的变渗透度含油轴承

本文介绍了作者研制的一种沿圆周方向和半径方向均变渗透度含油轴承，与以往的变渗透度含油轴承相比，其内部结构更为合理，其高低渗透度区过渡平缓，应力集中得到缓和，在制造和使用过程中不易破裂。理论分析与实验研究均表明：与普通含油轴承相比，其性能更为优越。     

基于ICA和小波变换的滚动轴承故障诊断方法研究

提出了结合独立分量分析(ICA)和小波变换进行滚动轴承故障诊断的方法。在设计的系统平台上,首先对冲击脉冲信号进行预处理,使信号较好地满足独立分量分析的前提条件。然后,应用独立分量快速算法分离故障轴承的冲击脉冲信号,通过小波快速算法完成信号重构,实现滚动轴承故障的识别。实验结果表明,利用独立分量分析方法提取的故障状态特征向量与小波快速算法相结合可以有效、准确地识别滚动轴承的故障信号。     

太空用固体润滑轴承试验分析

以轴承的固体润滑为研究对象，进行了轴承跑合试验、轴承寿命及性能试验研究分析，为采用固体润滑技术解决轴承空间润滑问题提供了依据。