销—盘摩擦过程中的热行为研究

发布时间：2018-11-27 13:11

【摘要】：边界摩擦过程中伴随着摩擦生热和热传导的热行为,随着边界膜温度的升高其润滑性能也会发生变化。本文以销-盘摩擦为对象,采用数值分析与实验结合的方法,对销-盘系统在摩擦过程中温度场的变化进行了研究工作。首先,依据摩擦学和传热学原理推导出销-盘摩擦模型的导热微分方程和温度迭代公式,采用“网格固定质量流动”的方法实现盘模型的转动场与温度场的耦合,拟合边界膜的温度特性函数,进而采用相应的迭代法编写求解变摩擦系数条件下的销-盘摩擦系统的稳态温度场和瞬态温度场的仿真程序。其次,为了验证仿真程序的正确性,研发了一台销-盘摩擦试验机。该试验机能使销试样和盘试样在一定的润滑油作用下,以一定的载荷、转速进行摩擦,同时通过一套数据采集系统能够实时测量和存储摩擦副的摩擦系数和摩擦面中心点的温度值。最后,在若干组摩擦条件下分别进行摩擦实验和仿真分析,对比两者的结果,可评价仿真程序的可靠性。仿真结果和实验结果表明：自主编写的销-盘摩擦温度场仿真程序能够得到系统的稳态温度场和瞬态温度场,其结果基本符合理论分析；仿真结果与实验基本吻合,说明仿真程序具有一定可靠性。
[Abstract]:With the increase of the temperature of the boundary film, the lubrication performance of the boundary friction is changed with the heat generation and heat conduction. In this paper, the change of temperature field of pin-disk system during friction is studied by the method of numerical analysis and experiment. Firstly, according to the principle of tribology and heat transfer, the heat conduction differential equation and temperature iterative formula of the pin disk friction model are derived, and the coupling of the rotation field and temperature field of the disk model is realized by the method of "fixed mass flow with mesh". The temperature characteristic function of the boundary film is fitted, and the corresponding iterative method is used to compile the simulation program to solve the steady and transient temperature field of the pin-disk friction system under the condition of variable friction coefficient. Secondly, in order to verify the correctness of the simulation program, a pin-disk friction tester is developed. The testing machine can make the pin sample and disk sample friction with certain load and speed under the action of certain lubricating oil. At the same time, a data acquisition system can be used to measure and store the friction coefficient of the friction pair and the temperature of the center of the friction surface in real time. Finally, friction experiments and simulation analysis are carried out under several groups of friction conditions, and the reliability of the simulation program can be evaluated by comparing the two results. The simulation results and experimental results show that the steady temperature field and transient temperature field of the system can be obtained by the self-compiled simulation program of pin-disk friction temperature field, and the results basically accord with the theoretical analysis. The simulation results are in good agreement with the experiment, which shows that the simulation program is reliable.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH117

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