圆锥滚子轴承互换性设计及分析

影响圆锥滚子轴承公称宽度的参数较多，而对其影响较大的滚子直径和内圈滚道直径的公差进行分组选配，从而降低轴承的加工难度，提高合套率，实现圆锥滚子轴承互换性要求。     

圆锥滚子轴承及推力调心滚子轴承大挡边球面曲率半径的设计改进

使用现行的设计方法，圆锥滚子轴承易发生啃挡边现象，而推力调心滚子轴承内圈球面挡边的回转中心绕轴承轴线旋转，形成一圆形轨迹，实际磨削中很难达到设计要求。为解决上述问题，从设计上进行改进，重新推算了一套计算有关挡边和滚子球基面参数的公式。     

无预负荷空心圆柱滚子轴承空心度的优化设计

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。     

圆锥滚子轴承套圈锻造工艺的探讨

圆锥滚子轴承内外圈套锻辗扩（挤压）锻造新工艺如圆筒形套圈套锻辗扩（挤压）工艺一样，在一条生产线上同时生产出同一套圆锥滚子轴承的内外圈锻件，并只有一个工艺废料芯。介绍了此工艺方法的特点及优点。附参考文献3篇。     

考虑滚子位置变化的圆柱滚子轴承非线性刚度特性分析

以圆柱滚子轴承为研究对象，考虑轴承运转过程中滚子周向位置分布的周期性变化，对经典圆柱滚子轴承载荷分布理论进行改进，并对由此引起的轴承刚度时变特性进行分析，同时研究圆柱滚子轴承平均刚度及平均接触滚子数随径向力的非线性变化规律。为了对改进理论算法进行验证，采用有限元接触分析方法对圆柱滚子轴承刚度及滚子接触状态进行分析。研究结果表明，改进理论算法和有限元接触法均能准确预测轴承瞬时刚度的时变特性及平均刚度随径向力的非线性变化特性，同时证明轴承平均接触滚子数的改变是轴承刚度变化的根源。基于改进理论算法进而分析轴承初始径向游隙、径向力、滚子设计数量等关键参数对圆柱滚子轴承性能的定量影响规律。     

某圆锥滚子轴承异音故障分析

一批圆锥滚子轴承32313装机使用后,产生很大的振动和噪声。经拆套分析发现,故障是由于滚子磨伤引起的。提出了避免磨伤的相应措施,使振动和噪声恢复到合格范围。     

高速圆柱滚子轴承非线性刚度分析

在航空发动机高速圆柱滚子轴承拟静力学分析基础上，建立基于轴承径向游隙的高速圆柱滚子轴承非线性刚度计算模型，分析了轴承内、外圈转速对高速圆柱滚子轴承工作径向游隙影响的关系，并对高速圆柱滚子轴承非线性刚度特性进行了研究，最后就某型号航空发动机主轴高速圆柱滚子轴承进行了实例计算与分析，得出在满足主机支承刚度条件下的合理高速圆柱滚子轴承工作径向游隙使用范围。     

内外圈相对倾斜对圆柱滚子轴承承载能力的影响分析

研究了由于转子弯曲引起的圆柱滚子轴承内外圈相对倾斜，以及轴承游隙与滚子修缘圆弧半径对轴承载荷分布的影响，并进行了数值计算和结果分析，提出了解决因轴承内外圆相对倾斜对轴承承载能力的影响问题的有效途径。     

圆锥滚子轴承凸度设计

利用仿真软件及有限元分析，以JRM3939/JRM3968XD轴承为例，对圆锥滚子轴承滚子和滚道的凸度进行设计，选定合适的滚子素线，确定滚子与滚道的接触状态及凸度匹配关系，并计算接触应力，为轴承的改进设计提供依据。     

对数型滚子凸度量设计中的几个问题

对数型凸度滚子可有效地避免边缘效应。通过对滚道宽度大于滚子长度和滚道宽度小于滚子长度两种情况滚子轴承的接触压力分布计算分析，提出了凸度量设计应注意的几个关键因素，即（１）凸度量触压力集中的程度，并相应减小接触长度，以充分发挥滚子轴承中的有限材料的能力。（２）最的齿度量取决于轴承载荷最大的滚子上所受的载荷和轴承的结构形式，即对某一特写工况条件。（３）滚子凸度量的设计载荷至少应取实际载荷的最大值，并以     

Hydro-Roll: A Novel Bearing Design with Superior Thermal Characteristics

A novel journal bearing design, called hydro-roll, which combines a hydrodynamic journal bearing with a rolling-element bearing in series, is presented. The hydro-roll principally operates as a rolling-element bearing at low speeds and as a hydrodynamic bearing at high speed. When properly designed, the hydro-roll can offer superior performance over the conventional hydrodynamic bearing in terms of both wear and thermal characteristics. The hydro-roll prevents the severe wear which occurs during the start-up of hydrodynamic journal bearings since it operates as a rolling-element bearing whenever the sliding friction is too high. This characteristic has the important advantage of reducing the risk of catastrophic failure by bearing seizure.

At a steady high speed, the hydro-roll operates as a hydrodynamic journal bearing while the sleeve together with the inner race of the rolling-element bearing turn at a low speed. This study focuses on the thermal analysis of a journal bearing with a rotating sleeve in comparison to an identical stationary sleeve. The results indicate that the sleeve rotation reduces the risk of bearing failure due to local overheating of the sleeve. The minimum sleeve speed required for this effect is evaluated.     

The influence of sleeve surface roughness on the load-carrying capacity of journal bearings in a magnetic field

The influence of bearing sleeve roughness on the pressure distribution, temperature distribution and load-carrying capacity of a journal bearing in a magnetic field is discussed.The magnetic field increases the load-carrying capacity of the bearing with a smooth sleeve to a greater extent than it increases that of the bearing with a rough sleeve.     

油膜轴承锥套过盈装配过程中的压力分布及损伤

针对1580 PC热板带连轧机油膜轴承在装拆与使用过程中的锥套损伤问题,建立锥套装配的边界元力学模型及边界条件。利用三维弹塑性接触问题边界元法定量分析轧机油膜轴承锥套与轧辊辊颈过盈装配过程中的变形和载荷特性,通过设定不同加载模型的参数,对锥套装拆过程进行数值模拟。讨论油膜轴承偏载时锥套接触应力和变形对锥套与辊颈损伤的影响,得出装拆过程中不同胀型压力和轴向推力条件下的应力和应变变化规律,找出导致锥套损伤的根本原因,给出防止锥套与辊颈装配过程损伤的具体改进措施。利用制造出的两台轧机油膜轴承样机试验验证理论分析结果的正确性,并且找到油膜轴承损伤的根本原因。     

The numerical analysis of the radial sleeve bearing with combined surface slip

In order to improve the carrying capacity and reduce the temperature rise in high speed and precise spindle systems, a combined surface radial sleeve bearing using the interfacial slip technique was discussed. An extended Reynolds equation was derived based on the modified slip length model considering the limiting shear stress. By means of the finite differential methods, the characteristic analysis and optimization of the slip region of the combined surface sleeve bearing were carried out, and it has been proved that there is still a considerable large load support in a parallel sliding gap. Comparing with the general journal bearing, the load capacity and end leakage rate of the combined surface sleeve bearing can be increased greatly and the load capacity can be increased by 1.75 times. The attitude angle, friction drag, temperature rise of the combined bearing can be decreased distinctly and the temperature rise can be decreased by 92.4%.     

采用工程塑料轴承的免润滑输送链

为提高烟草产品质量安全,降低维护成本,对贮柜和喂料机使用的输送链进行创新改进,在输送链的滚子与套筒之间增加工程塑料轴承,工程塑料轴承与套筒直接作用实现自润滑,达到免润滑的效果。这种工程塑料轴承有较高的耐磨性、抗疲劳性和较小的摩擦因数。     

Influence of Wall Slip on the Dynamic Properties of a Rotor-Bearing System

Based on the limiting shear stress model, we used a multi-linearity finite element algorithm and quadratic programming technique to study the influence of wall slip (boundary slip) on the operation stability of a rigid rotor-bearing system. The shaft surface is designed as a no-slip surface. The bearing sleeve surface is designed as three types of surfaces: (a) no slip is allowed (traditional no-slip rotor-bearing system), (b) the entire sleeve surface has the same slip property (the homogeneous slip bearing), and (c) the sleeve surface is optimized to have an optimized slip zone (the optimized slip bearing). It is found that if the sleeve surface has a single slip property, the wall slip generally reduces the system operation stability, as well as the load-carrying capacity. However, if the sleeve surface is designed as the optimized slip surface, the wall slip enhances the system operation stability as well as the load-carrying capacity. Furthermore, the smaller the surface limiting shear stress, the better the dynamic stability and the higher the load-carrying capacity.     

自动垂直钻具井下流场特性研究

自动垂直钻井系统在工作中,导向活套与钻杆要有一个相对转速。导向活套在与钻杆连接轴承的摩擦转矩的作用下而随钻杆转动,而井下返程泥浆在通过活套时也会产生阻碍活套转动的反向扭矩,该反向扭矩是保证活套与钻杆存在相对转速的一个关键因素。利用FLUENT软件包对活套井下泥浆流场进行建模仿真,揭示了泥浆通过活套时的流动特性。计算结果表明泥浆对活套的反向扭矩取决于泥浆的流量、活套转速等多种因素,且只要钻杆转速超过平衡钻杆与活套的摩擦转矩的临界转速,该反向扭矩就可以使活套与钻杆间产生相应的转速差。     

油膜轴承锥套过盈装配的耦合变形分析

针对油膜轴承的锥套与轧辊辊颈通过液压胀型实现过盈配合的装配方式，以及锥套和辊颈在工作中所产生的表面损伤特点，采用接触问题有限元法分析了锥套装配过程中不同工况引起的接触状态分布形式和变形耦合特征，讨论了锥套变形对其工作性能的影响。     

镶嵌式复合径向滑动轴承的实验研究

对镶嵌式径向滑动轴承进行了实验研究,通过摩擦磨损实验进行了选材,提出了加工该型轴承的制造工艺,并采用台架试验测试了制得的几种镶嵌式径向滑动轴承的承载能力。结果表明：镶嵌式径向滑动轴承的承载能力比普通径向滑动轴承有较大的提高,其中镶嵌PTFE高分子材料的轴承,因PTFE材料能在其对偶件表面形成较为完全的转移膜,改善了轴承润滑性能,使轴承具有较高的承载能力。