高铁轴承试验台陪试轴承温度场特性及散热方法研究

发布时间：2018-06-17 11:41

本文选题：陪试轴承 + 温度场　；参考：《河南科技大学》2013年硕士论文

【摘要】：陪试轴承是高铁轴承试验台的关键零部件，它支承着试验台整个主轴系统，在高速运转工况下承受着主轴上的巨大工作载荷。由于陪试轴承的工作转速超过其参考转速，在工作过程中必然产生大量的热量，这些热量如果不能及时散发出去，，容易造成陪试轴承温度过高。如果陪试轴承的温度超过一定范围，就会造成润滑剂的失效、轴承内滚子与滚道表面之间油膜的破坏，使陪试轴承的滚动体和内外圈出现烧伤、胶合，甚至轴承报废，从而使试验台无法正常工作。因此，陪试轴承的正常运转是整个高铁轴承试验正常进行的关键。对高铁轴承试验台陪试轴承在工作时的温度场特性进行研究，并根据其温度特性设计散热方法和散热装置，改善陪试轴承的工作环境，可以保证其在正常的温度范围内工作，确保高铁轴承试验台的正常运转。本文根据高铁轴承试验台的设计要求，选取了合适的陪试轴承型号。利用两种摩擦力矩计算方法对陪试轴承进行了计算，通过对比分析，选择了更适合陪试轴承工况的摩擦力矩计算方法对陪试轴承进行生热计算。利用热流网络法建立了陪试轴承的传热模型，对陪试轴承在各种工况下的生热、传热和温度特性进行了研究，并分别对陪试轴承径向、外圈轴向和外圈周向的温度分布进行了计算，得出了陪试轴承在各种工况下的温度场特性。用有限元仿真方法对分析结果进行了验证，仿真结果与计算结果基本吻合，说明传热模型正确，分析合理，为陪试轴承的散热系统设计提供了理论依据。针对陪试轴承温度场的分析结果，设计了陪试轴承的散热系统。提出了一种全新的滚动轴承散热方法，在此方法基础上设计了一种滚动轴承散热装置，为需要外部强制散热的高速重载轴承提供了一种散热解决方案。
[Abstract]:The test bearing is the key part of the high speed bearing test bed. It supports the whole spindle system of the test bed and bears the huge working load on the main shaft under the high speed operation condition. Because the working speed of the test bearing exceeds its reference speed, a lot of heat will be produced in the working process. If the heat is not released in time, it will easily cause the temperature of the test bearing to be too high. If the temperature of the test bearing exceeds a certain range, it will result in the failure of the lubricant, the destruction of the oil film between the roller and the surface of the raceway, and the burning, gluing, and even the scrapping of the rolling body and the inner and outer ring of the test bearing. So that the test bed can not work properly. Therefore, the normal operation of the test bearing is the key to the normal test of the high-speed bearing. The characteristics of temperature field of the test bearing of high speed bearing are studied, and according to its temperature characteristic, the heat dissipation method and device are designed to improve the working environment of the test bearing, so as to ensure that the bearing can work in the normal temperature range. Ensure the normal operation of the high-speed bearing test rig. According to the design requirements of the high-speed bearing test rig, the appropriate model of the test bearing is selected. Two kinds of friction moment calculation methods are used to calculate the test bearing. By comparing and analyzing the friction moment calculation method which is more suitable for the working condition of the companion test bearing is selected to calculate the heat generation of the companion test bearing. The heat transfer model of the test bearing is established by using the heat flow network method. The heat generation, heat transfer and temperature characteristics of the test bearing under various working conditions are studied, and the radial characteristics of the test bearing are studied respectively. The temperature distribution of outer ring axial direction and outer ring circumferential direction was calculated, and the temperature field characteristics of the test bearing under various working conditions were obtained. The finite element simulation method is used to verify the analysis results. The simulation results are in good agreement with the calculated results. The results show that the heat transfer model is correct and the analysis is reasonable, which provides a theoretical basis for the design of the heat dissipation system of the test bearing. According to the analysis results of the temperature field of the test bearing, the heat dissipation system of the test bearing is designed. A new heat dissipation method for rolling bearings is presented. Based on this method, a heat dissipation device for rolling bearings is designed, which provides a heat dissipation solution for high speed and heavy load bearings which require external forced heat dissipation.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U270.33;TH133.3

【参考文献】