关节轴承衬垫试验机的局部加热技术研究

发布时间：2018-08-12 20:57

【摘要】：关节轴承衬垫试验机在关节轴承衬垫性能的试验研究中占据重要地位,试验机模拟的衬垫的环境温度直接影响到衬垫性能的评估。目前,国内外试验机环境温度的施加大多数为传统的整体式加热,这种加热方式在试验过程中对试验机的非试验部位也进行了加热,所以对试验机以及评估衬垫性能的试验结果产生了不良影响,并且效率低、温升慢。为了消除非试验部位温升对试验机和试验结果的不良影响,并提高试验中的温升效率,本文设计并制造了一种局部加热装置,主要的研究内容如下:介绍了温度场计算的理论依据,建立了传热轴的传热过程模型,得到了传热轴局部加热的温度场基本方程,并用数值方法求解出传热轴达到设定温度需要的热源加载温度。通过有限元分析软件,模拟了传热轴加载热源后温度场的分布情况,对温度场理论计算结果进行了验证,得到了试验区的温差大小,以及传热轴上测温区和试验区温度的对应关系。依据传热学理论、电磁感应理论设计了应用于关节轴承衬垫试验机的硅橡胶加热片式与电感加热式两种局部加热装置。在硅橡胶加热片式局部加热装置中主要进行了硅橡胶加热片的选型和温度控制系统的设计;感应加热式局部加热装置中主要进行了电磁感应器的设计和温度控制系统的设计。使用关节轴承衬垫试验机进行了局部加热温度试验,得到了加载一定温度时传热轴各位置的温度数据,与仿真得到的数据进行对比,验证了仿真所得温度场分布的准确性以及理论计算公式的正确性;分析传热轴测温区和试验区的温度变化曲线,结合有限元分析结果进行对比,验证了测温区和试验区温度关系的准确性,得到局部加热装置间接测温的可行性。
[Abstract]:The joint bearing liner test machine plays an important role in the performance test of joint bearing liner. The environmental temperature of the gasket simulated by the testing machine has a direct impact on the evaluation of the performance of the gasket. At present, the application of ambient temperature in domestic and foreign testing machine is mostly the traditional integral heating, and the non-test part of the testing machine is also heated by this heating method in the course of the test. Therefore, the test results of testing machine and evaluating the performance of gasket have a bad effect, and the efficiency is low and the temperature rise is slow. In order to eliminate the adverse effect of temperature rise on the test machine and test results, and to improve the efficiency of temperature rise in the test, a local heating device is designed and manufactured in this paper. The main research contents are as follows: the theoretical basis for the calculation of the temperature field is introduced, the heat transfer process model of the heat transfer shaft is established, and the basic equation of the local heating temperature field of the heat transfer shaft is obtained. The heat source loading temperature which the heat transfer shaft reaches the set temperature is solved by numerical method. The distribution of temperature field after heat transfer axis loading is simulated by finite element analysis software. The theoretical calculation results of temperature field are verified and the temperature difference of the test area is obtained. And the corresponding relationship between the temperature measurement zone and the test area on the heat transfer shaft. Based on the heat transfer theory and electromagnetic induction theory, two kinds of local heating devices, silicone rubber heating sheet and inductive heating, were designed for joint bearing liner testing machine. The selection of silicone rubber heating sheet and the design of temperature control system are mainly carried out in the local heating device of silicone rubber, and the electromagnetic inductor and the temperature control system are designed in the induction heating local heating device. The local heating temperature test was carried out by using the joint bearing liner tester. The temperature data of the heat transfer shaft at certain temperature were obtained and compared with the simulated data. The accuracy of the simulated temperature field distribution and the correctness of the theoretical calculation formula are verified, and the temperature variation curves of the temperature measurement zone and the test area of the heat transfer axis are analyzed and compared with the results of the finite element analysis. The accuracy of the relationship between the temperature measurement area and the test area is verified, and the feasibility of indirect temperature measurement with the local heating device is obtained.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH87

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