本文選題：齒輪 + 熱流耦合��； 參考：《重慶大學(xué)》2011年碩士論文

【摘要】：齒輪嚙合過(guò)程中由于輪齒嚙合面相對(duì)滑動(dòng)將產(chǎn)生大量熱量,若產(chǎn)生的熱量不能及時(shí)散去則會(huì)導(dǎo)致齒輪的溫度上升,引起齒輪的承載能力和工作性能的下降,甚至直接導(dǎo)致齒輪失效。齒輪箱的潤(rùn)滑冷卻效果是決定齒輪溫度的主要原因,而齒輪箱內(nèi)潤(rùn)滑油的流動(dòng)特性對(duì)其性能有較大的影響。因此,開展基于熱流耦合的齒輪對(duì)流換熱及溫度場(chǎng)數(shù)值仿真分析,對(duì)改善齒輪副傳熱特性具有重要的理論意義及工程應(yīng)用價(jià)值。 本文課題來(lái)源于重慶市科技攻關(guān)計(jì)劃項(xiàng)目�；邶X輪嚙合原理、流體動(dòng)力學(xué)和傳熱學(xué)理論,運(yùn)用數(shù)值仿真方法,研究油浴潤(rùn)滑的齒輪箱內(nèi)部流場(chǎng)、齒輪對(duì)流換熱及齒輪溫度場(chǎng)。本文的主要研究工作如下: ①將UG建立的漸開線齒輪副參數(shù)化模型導(dǎo)入Gambit中,建立齒輪箱內(nèi)流體的計(jì)算模型;采用動(dòng)網(wǎng)格及UDF技術(shù),在Fluent中對(duì)齒輪箱油浴潤(rùn)滑的內(nèi)部氣液兩相流場(chǎng)進(jìn)行了瞬態(tài)特性數(shù)值模擬,得出瞬時(shí)油液分布、流體壓力和速度。 ②對(duì)不同齒輪轉(zhuǎn)速和浸油深度的齒輪箱內(nèi)部流場(chǎng)進(jìn)行流體動(dòng)力學(xué)仿真,計(jì)算其瞬時(shí)油液分布以及壓力、速度時(shí)間歷程,對(duì)比分析了不同轉(zhuǎn)速和浸油深度對(duì)齒輪箱內(nèi)部流場(chǎng)特性的影響規(guī)律。 ③構(gòu)建了包括流體與固體的齒輪箱三維瞬態(tài)傳熱有限元模型,計(jì)算了嚙合齒面的平均熱流量,利用Fluent軟件對(duì)齒輪箱的傳熱模型進(jìn)行熱流耦合仿真分析,得出了齒輪對(duì)流換熱系數(shù)的等值線。 ④對(duì)運(yùn)轉(zhuǎn)過(guò)程中齒輪的瞬態(tài)溫度場(chǎng)進(jìn)行了流體動(dòng)力學(xué)仿真,得出不同時(shí)刻齒輪副的溫度等值線以及輪齒嚙合區(qū)附近節(jié)點(diǎn)的溫度時(shí)間歷程,并研究了轉(zhuǎn)速對(duì)齒輪溫度分布的影響。
[Abstract]:In the process of gear meshing, a large amount of heat will be produced due to the relative sliding of the gear tooth meshing surface. If the generated heat can not be dissipated in time, the temperature of the gear will rise and the bearing capacity and working performance of the gear will decrease. Even causes gear failure directly. The lubricating cooling effect of the gear box is the main reason for determining the gear temperature, and the flow characteristics of the lubricating oil in the gear box have great influence on its performance. Therefore, the numerical simulation analysis of convection heat transfer and temperature field based on heat flux coupling has important theoretical significance and engineering application value in improving the heat transfer characteristics of gear pair. This paper comes from the project of Chongqing Science and Technology Project. Based on the theory of gear meshing, fluid dynamics and heat transfer, the flow field, convection heat transfer and gear temperature field in oil bath lubricated gear box are studied by numerical simulation. The main work of this paper is as follows: 1. The parameterized model of involute gear pair established by UG was introduced into Gambit, and the calculation model of fluid in gear box was established. The transient characteristics of the gas-liquid two-phase flow field in the oil bath lubrication of the gear box are simulated in Fluent. The instantaneous oil distribution, fluid pressure and velocity are obtained. (2) the hydrodynamic simulation of the internal flow field of the gear box with different gear speed and oil immersion depth was carried out to calculate the instantaneous oil distribution and the pressure and velocity time history. The influence of different rotational speed and oil immersion depth on the flow field characteristics of the gearbox was analyzed. 3Three-dimensional transient heat transfer finite element model of gear box including fluid and solid is constructed, the mean heat flux of meshing tooth surface is calculated, and the heat transfer model of gear box is simulated and analyzed by Fluent software. The contour of convection heat transfer coefficient of gear is obtained. (4) the transient temperature field of gear is simulated by hydrodynamics, and the temperature isoline of gear pair at different times and the temperature time history of nodes near gear tooth meshing zone are obtained, and the influence of rotational speed on gear temperature distribution is studied.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH132.41

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 張啟胤;推土機(jī)動(dòng)力換擋變速箱的熱平衡分析[D];太原科技大學(xué);2012年

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本文編號(hào)：1942109