Investigation and modelling of the operational behaviour of tapered roller bearings at high speeds

尽管与主轴轴承相比，圆锥滚子轴承具有较高的额定载荷和刚度，但在重型粗加工和HPC操作的机床主轴中，圆锥滚子轴承的使用并不常见。这主要是由于他们的低速额定值和有限的知识，他们的高速运行behavior.This研究项目追求两个主要目标：第一，算法来描述圆锥滚子轴承的高速运行行为的开发。一般来说，轴承内部的滚动和滑动接触建模构成了这些计算的基础。详细地说，必须特别强调摩擦学上至关重要的非赫兹滚子-肋接触。除了描述力、速度和温度相关的载荷-位移行为外，这些模型应构成计算轴承摩擦的基础。为了进一步分析滚子-挡边接触的载荷、润滑和摩擦条件，进行了模拟实验。其次，采用真实的轴承进行了试验台试验，以验证计算结果。此外，这些测试旨在证明新算法允许开发具有显著提高的额定速度的圆锥滚子轴承。该项目中开发的方法可以为更高级的圆锥滚子轴承运行行为描述奠定基础。此外，它们将允许这种轴承在新型机床主轴和其他应用（如高速齿轮）中的应用进行特定优化。

Despite their high load rating and stiffness compared to spindle bearings, the usage of tapered roller bearings in machine tool main spindles for heavy roughing and HPC operations is not very common. This is mainly due to their low speed rating and the limited knowledge about their high speed operating behaviour.This research project pursues two major objectives: First, algorithms to describe the high speed operating behaviour of tapered roller bearings are to be developed. Generally, modelling the rolling and sliding contacts inside the bearing forms the basis for these calculations. In detail, special emphasis has to be put on the tribologically crucial, non-Hertzian roller-rib contact. Besides describing the force, speed and temperature dependent load-displacement behaviour, these models shall form the basis for calculating the bearing friction. Analogy experiments to further analyse the load, lubrication and friction conditions in the roller-rib contact shall be carried out to support the modelling.Secondly, test rig experiments with real bearings are used to verify the calculations. Additionally, these tests are designed to prove that the new algorithms allow for the development of tapered roller bearings with considerably increased speed ratings.The methods developed in this project can form the basis for more advanced descriptions of the operating behaviour of tapered roller bearings. Additionally they will allow for the specific optimisation of such bearings for the application in new types of machine tool main spindles and other applications like high speed gears.