本文關(guān)鍵詞：基于熱固耦合的齒輪軸軸肩微動(dòng)磨損機(jī)理研究　出處：《湖南大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 齒輪軸 微動(dòng)磨損 熱固耦合 熱應(yīng)力 有限元分析

【摘要】：微動(dòng)是發(fā)生在接觸表面之間振幅很小的往復(fù)運(yùn)動(dòng),而微動(dòng)磨損是工程實(shí)際中接觸表面產(chǎn)生微動(dòng)而出現(xiàn)的損傷形式。微動(dòng)磨損可能造成機(jī)構(gòu)配合性能改變,降低機(jī)器的工作可靠性和壽命,甚至引發(fā)嚴(yán)重的工程事故。由于表面磨損和表面微裂紋的誘發(fā)和擴(kuò)展在現(xiàn)代高科技領(lǐng)域引起的破壞逐漸增加,因此研究微動(dòng)磨損產(chǎn)生的機(jī)理,確定微動(dòng)磨損的影響因素并采取相應(yīng)的改進(jìn)措施有著非常重要的現(xiàn)實(shí)意義。 為此,本文以校企合作項(xiàng)目為依托,運(yùn)用有限元分析軟件ABAQUS對(duì)發(fā)動(dòng)機(jī)動(dòng)力總成齒輪軸軸肩與圓錐滾子軸承內(nèi)圈接觸面出現(xiàn)的微動(dòng)磨損破壞現(xiàn)象進(jìn)行了研究,主要工作與創(chuàng)新之處如下： (1)確定了軸肩微動(dòng)磨損的影響因素,建立了齒輪軸機(jī)構(gòu)的有限元模型和數(shù)學(xué)模型,為齒輪軸的熱固耦合分析奠定了有力的研究基礎(chǔ)。 (2)研究分析了軸肩處熱量的來(lái)源,建立了錐齒輪和圓錐滾子軸承的幾何模型和有限元模型,得出了齒輪溫度、軸承溫度和軸肩處溫度隨轉(zhuǎn)速變化的規(guī)律。 (3)用熱固耦合的方法確定減速器軸肩所受熱應(yīng)力,并分析微動(dòng)磨損和溫度的關(guān)系,通過(guò)氧化磨損公式計(jì)算齒輪軸軸肩的微動(dòng)磨損量,從而說(shuō)明溫度是引起微動(dòng)破壞的重要因素。
[Abstract]:Fretting is a reciprocating movement with small amplitude between contact surfaces, and fretting wear is the damage form of fretting the contact surface in engineering practice. Fretting wear may change the coordination performance of the mechanism. Reducing the working reliability and life of the machine, and even causing serious engineering accidents, the damage caused by the surface wear and micro-cracks in the field of modern high technology is increasing gradually. Therefore, it is of great practical significance to study the mechanism of fretting wear, determine the influencing factors of fretting wear and take corresponding improvement measures. Therefore, this paper relies on the cooperation project of school and enterprise. Using the finite element analysis software ABAQUS, the fretting wear failure phenomenon of the contact surface between the shaft shoulder of the engine powertrain gear shaft shoulder and the inner ring of the cone roller bearing is studied. The main work and innovation are as follows:. 1) the factors influencing the fretting wear of the shaft shoulder are determined, and the finite element model and mathematical model of the gear shaft mechanism are established, which lays a strong research foundation for the thermal-solid coupling analysis of the gear shaft. 2) the source of heat at the shaft shoulder is analyzed, the geometric model and finite element model of bevel gear and bevel roller bearing are established, and the gear temperature is obtained. The relationship between bearing temperature and shaft shoulder temperature with rotating speed. The thermal-solid coupling method is used to determine the thermal stress on the shaft shoulder of the reducer, and the relationship between fretting wear and temperature is analyzed, and the fretting wear quantity of gear shaft shoulder is calculated by oxidizing wear formula. It shows that temperature is an important factor of fretting failure.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH132.41;TH117.1

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本文編號(hào)：1414561