本文選題：工程機(jī)械　切入點(diǎn)：濕式多盤(pán)制動(dòng)器　出處：《蘭州理工大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：濕式多盤(pán)制動(dòng)器是工程機(jī)械的核心部件,在復(fù)雜的工作條件下容易出現(xiàn)制動(dòng)器的磨損、翹曲和變形從而導(dǎo)致失效。為了提高濕式多盤(pán)制動(dòng)器的性能和使用壽命,本文分析了造成其失效的原因；并以濕式多盤(pán)制動(dòng)器為研究對(duì)象,建立了三維有限元模型,運(yùn)用ANSYS workbench14.0軟件對(duì)關(guān)鍵元件的性能進(jìn)行了研究；最后通過(guò)對(duì)制動(dòng)器的制動(dòng)過(guò)程進(jìn)行模擬分析,得到了濕式多盤(pán)制動(dòng)器的初始?jí)毫Ψ植己吞厥夤r下的溫度場(chǎng)和熱應(yīng)力的分布。具體的工作內(nèi)容如下： 在分析濕式多盤(pán)制動(dòng)器工作原理和掌握國(guó)內(nèi)外的研究現(xiàn)狀的基礎(chǔ)上,對(duì)關(guān)鍵元件制動(dòng)過(guò)程中熱量的產(chǎn)生、熱傳導(dǎo)方程和非線(xiàn)性接觸理論進(jìn)行了闡述。運(yùn)用有限元法求解了濕式多盤(pán)制動(dòng)器的熱應(yīng)力耦合問(wèn)題及其結(jié)構(gòu)的非線(xiàn)性問(wèn)題。 依據(jù)濕式多盤(pán)制動(dòng)器的結(jié)構(gòu)參數(shù)和材料參數(shù),建立了三維有限元模型,并對(duì)模型進(jìn)行了必要的簡(jiǎn)化和假設(shè),確定了濕式多盤(pán)制動(dòng)器的載荷和邊界條件。在此基礎(chǔ)上運(yùn)用ANSYS workbench軟件對(duì)其進(jìn)行模擬制動(dòng)過(guò)程,且得到了開(kāi)有8個(gè)徑向油槽的濕式多盤(pán)制動(dòng)器的應(yīng)力分布云圖和熱應(yīng)力耦合的分布云圖。 探討了在特殊工況下,制動(dòng)器的溫度和應(yīng)力分布規(guī)律。依據(jù)該分布規(guī)律得出溫度分布不均勻是導(dǎo)致制動(dòng)器摩擦盤(pán)產(chǎn)生變形、裂紋直至失效的主要原因。為得到制動(dòng)過(guò)程中摩擦盤(pán)的溫度變化情況,根據(jù)以上分析的結(jié)果設(shè)計(jì)了一個(gè)溫度測(cè)量系統(tǒng),該系統(tǒng)可以實(shí)現(xiàn)對(duì)制動(dòng)器溫度的實(shí)時(shí)監(jiān)測(cè)和控制。
[Abstract]:Wet multi-disc brake is the core part of construction machinery. In order to improve the performance and service life of wet multi-disc brake, it is easy to wear, warp and deform the brake under complex working conditions. In this paper, the causes of the failure are analyzed, and the 3D finite element model is established, and the performance of the key components is studied by using ANSYS workbench14.0 software, taking the wet multi-disc brake as the research object. Finally, the initial pressure distribution of wet multi-disc brake and the distribution of temperature field and thermal stress under special working conditions are obtained by simulating and analyzing the braking process of the brake. The specific work contents are as follows:. On the basis of analyzing the working principle of wet multi-disc brake and mastering the research status at home and abroad, the heat production in the braking process of key components is analyzed. The heat conduction equation and nonlinear contact theory are described. The thermal stress coupling problem of wet multi-disc brake and the nonlinear problem of its structure are solved by finite element method. According to the structural and material parameters of wet multi-disc brake, a three-dimensional finite element model is established, and the model is simplified and hypothesized. The load and boundary conditions of wet multi-disc brake are determined. On the basis of this, the braking process is simulated by ANSYS workbench software. The stress distribution cloud diagram and thermal stress coupling cloud diagram of wet multi-disc brake with 8 radial oil grooves are obtained. The distribution law of temperature and stress of brake under special working condition is discussed. According to the distribution law, it is concluded that the uneven temperature distribution leads to the deformation of brake friction disk. In order to obtain the temperature change of friction disk during braking, a temperature measuring system is designed according to the above analysis results, which can realize the real-time monitoring and control of brake temperature.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU603;TH134

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