高速润滑脂拖动特性的实验研究

发布时间：2018-04-19 18:51

本文选题：润滑脂 + 试验台　；参考：《河南科技大学》2012年硕士论文

【摘要】：弹流拖动特性作为弹流润滑理论研究的一个重要领域，它对滚动轴承的动态性能有着很大的影响，是滚动轴承动态设计的重要参数之一。在现代轴承设计中，润滑剂已成为轴承的基本元件之一，所以润滑剂在不同工况条件下的拖动特性也是轴承设计当中不可缺少的基本设计依据。由于脂润滑方式广泛地应用于滚动轴承中，通过模拟实际工况下的表面接触得到润滑脂膜在不同工况下的拖动力，是最为可靠的数据。所以，在充分供脂的条件下，进行润滑脂拖动特性的试验研究对于轴承的优化设计具有非常重要的现实意义。为了在实验室条件下模拟出滚动轴承润滑脂的实际工况，并能对工况条件进行控制，需采用专门研制的高速润滑脂拖动特性试验台。试验台主要包括测试球盘、动力及调速系统、加载及静压主轴的液压系统、供脂系统、冷却系统、辅助润滑系统、测力系统和信号采集系统。依据现有的试验设备，本项研究对试验系统做了许多改进工作，其中主要对调速部分和被测脂供脂系统做了较大改进，大大提高了测试及控制的精度。借助改良的试验设备，，对高速润滑脂7018和LGLT2在不同速度、不同载荷及不同滑差率条件下进行了一系列拖动特性测试。得到了两种润滑脂的拖动系数随滑滚比变化的特性曲线试验结果。通过考察现有拖动力理论模型，分析所得的试验数据，结果表明大多数模型与被测脂的试验结果都有一定的差距，但T-J弹塑模型能较准确地预测试验结果。因此，用T-J弹塑模型对LGLT2润滑脂进行拖动特性的理论分析。结果证明，它可以在试验范围内较为准确地预测拖动特性数据，得到了令人满意的结果。本课题完成了对SKF润滑脂LGLT2拖动特性的测试分析工作，为今后SKF公司开发新的轴承专用润滑脂或其它润滑脂的拖动特性测试奠定了良好基础。
[Abstract]:As an important research field of EHL theory, EHL drag has great influence on the dynamic performance of rolling bearings and is one of the important parameters in the dynamic design of rolling bearings. In modern bearing design, lubricant has become one of the basic components of bearing, so the drag characteristic of lubricant under different working conditions is also an indispensable basic design basis in bearing design. Because grease lubrication is widely used in rolling bearings, it is the most reliable data to get the traction force of grease film under different working conditions by simulating the surface contact under actual working conditions. Therefore, under the condition of sufficient grease supply, it is of great practical significance to study the drag characteristics of lubricating grease for the optimum design of bearings. In order to simulate the actual working conditions of rolling bearing grease under laboratory conditions and to control the operating conditions, a specially developed high-speed grease drag characteristic test bed is needed. The test bench mainly includes ball disk, power and speed control system, hydraulic system of loading and static pressure spindle, grease supply system, cooling system, auxiliary lubrication system, force measuring system and signal collecting system. According to the existing test equipment, this study has made a lot of improvements to the test system, in which the speed-regulating part and the fat-feeding system have been greatly improved, which has greatly improved the accuracy of the test and control. With the help of the improved test equipment, a series of drag characteristics of high speed grease 7018 and LGLT2 were tested at different speeds, different loads and different slip rates. The test results of the drag coefficient of two kinds of lubricating greases with the slip-roll ratio are obtained. Based on the analysis of the experimental data obtained from the existing towing theoretical models, the results show that most of the models are far from those of the fat test, but the T-J elastoplastic model can accurately predict the test results. Therefore, T-J elastoplastic model is used to analyze the drag characteristics of LGLT2 grease. The results show that the drag characteristic data can be predicted more accurately in the range of test, and satisfactory results are obtained. This paper has completed the test and analysis of the LGLT2 drag characteristics of SKF grease, which has laid a good foundation for the development of new bearing special lubricating greases or other lubricating greases by SKF Company in the future.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.33;TH117

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