本文選題：液黏傳動　切入點：純油膜剪切　出處：《太原理工大學(xué)》2017年碩士論文

【摘要】：刮板輸送機是煤礦井下綜采工作面主要設(shè)備之一,因其驅(qū)動形式的不同,能耗和性能表現(xiàn)也不同。CST可控啟動裝置中的技術(shù)核心——液黏傳動作為一種較為新型的傳動形式,具有無級調(diào)速、高效節(jié)能、啟動沖擊小等特點,是實現(xiàn)機械傳動設(shè)備節(jié)能降耗的有效技術(shù)手段。在CST液黏傳動工作過程中,摩擦副的轉(zhuǎn)速差會使其間隙內(nèi)流體因內(nèi)摩擦而導(dǎo)致黏性耗散的產(chǎn)生,進而使摩擦副和工作油液的溫度升高,輸出的轉(zhuǎn)矩降低,最終導(dǎo)致傳動的性能降低。通過對摩擦副流場特性的研究可以為離合器的轉(zhuǎn)矩預(yù)測提供理論基礎(chǔ)以及分析流場溫度變化所產(chǎn)生的影響,進而為液黏傳動技術(shù)的研究和大功率液黏傳動設(shè)備的研發(fā)提供技術(shù)支持。本文以刮板輸送機的可控啟動裝置CST中液黏傳動的一對雙圓弧油槽摩擦副間流場為研究對象,將摩擦片表面的雙圓弧油槽和工作油的黏溫特性考慮在內(nèi),對摩擦副間隙內(nèi)的流場在純油膜剪切階段下的流場特性進行研究。通過建立在絕熱邊界下流場的簡化數(shù)學(xué)模型,測量摩擦片和對偶鋼片的尺寸,分析影響油液黏度變化的因素,試驗測定液黏傳動不同工作油的黏溫特性,然后利用Pro/E軟件建立流場的幾何模型,使用ICEM CFD軟件進行網(wǎng)格劃分,接著導(dǎo)入ANSYS CFX軟件中對其進行數(shù)值計算,獲得不同轉(zhuǎn)速差、不同入口流量、不同油膜厚度等工況條件下摩擦副間流場的流場特性和轉(zhuǎn)矩特性,最后對結(jié)果進行研究分析。結(jié)果表明,在純油膜剪切階段,液黏傳動流場的整體溫升幅度不大,溫度沿徑向呈遞增趨勢,油槽區(qū)溫度低于非油槽區(qū),轉(zhuǎn)速差和入口流量的變化對溫度影響較大。流場壓力沿徑向方向整體呈線性遞減趨勢,周向壓力與階梯軸承周向壓力分布類似整體呈周期性變化,轉(zhuǎn)速差的變化對進出口壓差影響較小,入口流量的變化對其影響較大。流場的流體流速沿徑向呈周期性變化,但總體呈遞增趨勢,流體流線軌跡在非油槽區(qū)整體呈拋物線。油槽會降低油膜傳遞的轉(zhuǎn)矩,轉(zhuǎn)矩隨動靜摩擦副轉(zhuǎn)速差增大而增大,入口流量對轉(zhuǎn)矩影響很小,而油液的黏溫特性會影響油膜傳遞的轉(zhuǎn)矩。
[Abstract]:Scraper conveyor is one of the main equipment in coal mine fully mechanized mining face. Because of its different driving form, energy consumption and performance are different. With the features of stepless speed regulation, high efficiency and low impact, it is an effective technical means to realize energy saving and consumption reduction of mechanical transmission equipment. In the working process of CST fluid viscous transmission, The speed difference of the friction pair will cause viscous dissipation of the fluid in the gap due to internal friction, which will increase the temperature of the friction pair and the working oil, and reduce the output torque. Through the study of the flow field characteristics of the friction pair, it can provide the theoretical basis for the torque prediction of the clutch and analyze the influence of the temperature change of the flow field on the performance of the transmission. Then it provides technical support for the research of fluid viscosity transmission technology and the research and development of high power fluid viscosity transmission equipment. In this paper, the flow field between a pair of double circular arc oil groove friction pairs in CST, a controllable starting device of scraper conveyor, is taken as an object of study. Taking into account the viscosity and temperature characteristics of double arc oil grooves and working oils on the surface of friction plates, the flow field characteristics of friction pairs in the phase of pure oil film shear are studied. A simplified mathematical model of flow field under adiabatic boundary is established. Measuring the size of friction sheet and dual steel sheet, analyzing the factors that affect the viscosity change of oil, testing and measuring the viscosity and temperature characteristics of different working oil in fluid viscosity transmission, then using Pro/E software to establish the geometric model of flow field, and using ICEM CFD software to mesh. Then it is introduced into ANSYS CFX software for numerical calculation, and the flow field characteristics and torque characteristics of friction pairs under different operating conditions, such as different rotational speed difference, different inlet flow rate and different oil film thickness, are obtained. Finally, the results are analyzed. The results show that in the pure oil film shearing stage, the whole temperature rise range of fluid viscosity transmission flow field is not large, the temperature is increasing along radial direction, and the temperature of oil trough area is lower than that of non-oil tank area. The variation of rotational speed difference and inlet flow rate has a great influence on temperature. The pressure of flow field decreases linearly along the radial direction, and the distribution of circumferential pressure is similar to that of step bearing. The variation of rotational speed difference has little effect on the pressure difference between inlet and outlet, and the change of inlet flow rate has a great influence on it. The flow velocity of the flow field changes periodically along the radial direction, but it increases gradually. The flow line trajectory of the fluid is parabola in the non-oil tank area. The oil tank will reduce the torque of oil film transfer, and the torque increases with the increase of the rotational speed difference of the static and static friction pairs, and the inlet flow rate has little effect on the torque. The viscosity and temperature characteristics of oil affect the torque of oil film transfer.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD528.3

【參考文獻】

相關(guān)期刊論文 前10條

1 郝敬團;姚婷;馬玉紅;楊宏偉;;影響航空潤滑油粘度的因素探究[J];廣州化工;2014年08期

2 謝方偉;侯友夫;張立強;袁曉明;宋喜福;席濤;;液黏傳動變形界面間油膜溫度場實驗研究[J];中南大學(xué)學(xué)報(自然科學(xué)版);2011年12期

3 李興虎;趙曉靜;;潤滑油粘度的影響因素分析[J];潤滑油;2009年06期

4 孟慶睿;侯友夫;;摩擦片表面溝槽對調(diào)速起動影響的數(shù)值模擬[J];潤滑與密封;2008年08期

5 王建紅;程向軍;;隔爆型雙速電動機在刮板輸送機上的應(yīng)用[J];煤;2008年01期

6 賈云海;張文明;;濕式摩擦離合器摩擦片表面溫升和油槽結(jié)構(gòu)研究[J];中國公路學(xué)報;2007年05期

7 姜翎燕;;工作面刮板輸送機技術(shù)現(xiàn)狀與發(fā)展趨勢[J];煤炭科學(xué)技術(shù);2007年08期

8 陳寧;邱敏秀;;液體粘性調(diào)速離合器摩擦副設(shè)計方法[J];農(nóng)業(yè)機械學(xué)報;2007年07期

9 陳寧,魏建華,項冰靜,吳根茂;潤滑油對液體粘性調(diào)速離合器工作性能影響的研究[J];熱力發(fā)電;2004年07期

10 花家壽,馬昌太,王志敏;液粘調(diào)速離合器摩擦片的測試和研究[J];傳動技術(shù);2004年02期

相關(guān)博士學(xué)位論文 前2條

1 崔紅偉;液黏調(diào)速離合器摩擦副轉(zhuǎn)矩特性研究[D];北京理工大學(xué);2014年

2 張德生;大功率閥控液力偶合器設(shè)計理論及關(guān)鍵技術(shù)研究[D];中國礦業(yè)大學(xué);2011年

相關(guān)碩士學(xué)位論文 前1條

1 候惠萍;閥控調(diào)速型液力偶合器的可靠性分析研究[D];太原理工大學(xué);2013年

，

本文編號：1670347