發(fā)布時(shí)間：2018-11-27 13:11

【摘要】：邊界摩擦過(guò)程中伴隨著摩擦生熱和熱傳導(dǎo)的熱行為,隨著邊界膜溫度的升高其潤(rùn)滑性能也會(huì)發(fā)生變化。本文以銷-盤摩擦為對(duì)象,采用數(shù)值分析與實(shí)驗(yàn)結(jié)合的方法,對(duì)銷-盤系統(tǒng)在摩擦過(guò)程中溫度場(chǎng)的變化進(jìn)行了研究工作。 首先,依據(jù)摩擦學(xué)和傳熱學(xué)原理推導(dǎo)出銷-盤摩擦模型的導(dǎo)熱微分方程和溫度迭代公式,采用“網(wǎng)格固定質(zhì)量流動(dòng)”的方法實(shí)現(xiàn)盤模型的轉(zhuǎn)動(dòng)場(chǎng)與溫度場(chǎng)的耦合,擬合邊界膜的溫度特性函數(shù),進(jìn)而采用相應(yīng)的迭代法編寫求解變摩擦系數(shù)條件下的銷-盤摩擦系統(tǒng)的穩(wěn)態(tài)溫度場(chǎng)和瞬態(tài)溫度場(chǎng)的仿真程序。 其次,為了驗(yàn)證仿真程序的正確性,研發(fā)了一臺(tái)銷-盤摩擦試驗(yàn)機(jī)。該試驗(yàn)機(jī)能使銷試樣和盤試樣在一定的潤(rùn)滑油作用下,以一定的載荷、轉(zhuǎn)速進(jìn)行摩擦,同時(shí)通過(guò)一套數(shù)據(jù)采集系統(tǒng)能夠?qū)崟r(shí)測(cè)量和存儲(chǔ)摩擦副的摩擦系數(shù)和摩擦面中心點(diǎn)的溫度值。 最后,在若干組摩擦條件下分別進(jìn)行摩擦實(shí)驗(yàn)和仿真分析,對(duì)比兩者的結(jié)果,可評(píng)價(jià)仿真程序的可靠性。 仿真結(jié)果和實(shí)驗(yàn)結(jié)果表明：自主編寫的銷-盤摩擦溫度場(chǎng)仿真程序能夠得到系統(tǒng)的穩(wěn)態(tài)溫度場(chǎng)和瞬態(tài)溫度場(chǎng),其結(jié)果基本符合理論分析；仿真結(jié)果與實(shí)驗(yàn)基本吻合,說(shuō)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.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TH117

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