發(fā)布時間：2018-05-23 12:05

  本文選題：乳化液 + 帶式輸送機(jī)��； 參考：《太原理工大學(xué)》2015年碩士論文

【摘要】：隨著帶式輸送機(jī)日益向大型化方向發(fā)展，其張緊裝置已發(fā)展成為以機(jī)電液一體化技術(shù)為特征的自動張緊裝置。使用礦物油作為液壓傳動介質(zhì)會有著火的危險(xiǎn)，對煤礦井下設(shè)備而言存在巨大的安全隱患。高水基乳化液是煤礦井下常用難燃液，因其阻燃性良好等優(yōu)點(diǎn)，已被廣泛應(yīng)用于液壓支架等煤礦機(jī)械。因此有必要研究用乳化液取代液壓油作為帶式輸送機(jī)張緊裝置的液壓傳動介質(zhì)。 本文首先通過對帶式輸送機(jī)張緊裝置設(shè)計(jì)理論的分析，以某3.2公里可伸縮式帶式輸送機(jī)為例，對其張緊力進(jìn)行了計(jì)算。針對乳化液介質(zhì)存在泄漏量大和乳化液馬達(dá)壽命短的問題，以盡量降低系統(tǒng)壓力并減少乳化液馬達(dá)的工作時間為原則，設(shè)計(jì)了以乳化液為介質(zhì)的帶式輸送機(jī)液壓張緊裝置。 利用AMESim仿真軟件，分析了在使用乳化液介質(zhì)張緊裝置的前提下，在可伸縮帶式輸送機(jī)啟動過程及機(jī)尾自移過程中機(jī)頭緊邊、松邊、張緊小車等處的動張力，以及張緊小車的位移和速度。在載荷、輸送帶參數(shù)、粘性摩擦力占總摩擦力比例不同的情況下，乳化液介質(zhì)張緊裝置對可伸縮帶式輸送機(jī)上述特性點(diǎn)張力、速度、位移等影響，得出主要結(jié)論如下： 泵站流量須大于400L/min，乳化液絞車才可滿足工作要求；機(jī)尾自移引起機(jī)頭緊邊張力波動較大，不會對游動小車和機(jī)頭松邊張力造成沖擊。游動小車最大位移為8.1m，發(fā)生在帶式輸送機(jī)啟動將要完成時刻，最大速度為0.18m/s。張緊裝置的設(shè)計(jì)中，在確定啟動系數(shù)和計(jì)算張緊力時，應(yīng)充分考慮帶式輸送機(jī)啟動方式和機(jī)尾自移的影響，啟動和機(jī)尾自移過程中，滿載工況均為最不利條件。 可伸縮帶式輸送機(jī)啟動過程中，機(jī)頭緊邊張力、張緊力比以及游動小車位移三者與載荷量均呈正相關(guān)；彈性波傳播速度與載荷量呈負(fù)相關(guān)；機(jī)尾自移時，載荷量越大，，游動小車張力波動越小。 彈性波在輸送帶中的傳播速度、輸送機(jī)啟動時機(jī)頭緊邊張力上升速度、機(jī)尾自移時機(jī)頭緊邊張力波動三者與輸送帶彈性模量均呈正相關(guān)，游動小車最大位移與輸送帶彈性模量呈負(fù)相關(guān)，機(jī)頭緊邊張力峰值與輸送帶彈性模量無關(guān)。輸送帶流變常數(shù)越大，對張力沖擊的緩沖作用越明顯。 粘性摩擦力占總摩擦力的比例越大，機(jī)頭緊邊張力峰值越小，張力越平穩(wěn)，機(jī)尾輸送帶速度波動也越小。
[Abstract]:With the development of belt conveyor in the direction of large scale, its tensioning device has been developed into an automatic tensioning device characterized by electromechanical and hydraulic integration technology. The use of mineral oil as hydraulic transmission medium has the danger of fire, which is a huge hidden danger to the underground equipment of coal mine. High water base emulsion is commonly used in coal mine. Because of its good flame retardancy, it has been widely used in coal mine machinery such as hydraulic support. Therefore, it is necessary to use emulsion instead of hydraulic oil as hydraulic transmission medium of belt conveyor tensioning device. Based on the analysis of the design theory of belt conveyor tensioning device, the tension force of a 3.2-kilometer extensible belt conveyor is calculated in this paper. In order to reduce system pressure and reduce the working time of emulsion motor, a hydraulic tensioning device of belt conveyor with emulsion as medium was designed, aiming at the problems of large leakage of emulsion medium and short life of emulsion motor. Using AMESim simulation software, the dynamic tension of the head, loose edge, tension car and so on in the starting process of the extensible belt conveyor and the self-moving process of the tail are analyzed on the premise of using the emulsion medium tensioning device. And the displacement and speed of the tension car. Under the condition that the load, the parameters of conveyor belt and the ratio of viscous friction to the total friction force are different, the effects of emulsion medium tensioning device on the tension, velocity and displacement of the above-mentioned characteristics of the extensible belt conveyor are obtained. The main conclusions are as follows: The flow rate of pump station must be more than 400 L / min before the emulsion winch can meet the working requirements, and the tension of tight edge of the head will fluctuate greatly due to the self-shift of the tail, which will not impact the loose edge tension of the swimming trolley and the nose. The maximum displacement of the trolley is 8.1 m, which occurs when the belt conveyor starts and is about to complete, with a maximum speed of 0.18 m / s. In the design of the tensioning device, when determining the starting coefficient and calculating the tension force, the influence of belt conveyor starting mode and tail self-shifting should be fully taken into account. In the process of starting and tail self-shifting, the most disadvantageous condition is the full load working condition. In the starting process of the extensible belt conveyor, the tension of the nose, the ratio of the tension to the tension and the displacement of the swimming trolley are all positively correlated with the load quantity, the velocity of elastic wave propagation is negatively correlated with the load quantity, and the load quantity increases when the tail is self-moving. The smaller the tension fluctuation of the swimming car. The propagation speed of elastic wave in the conveyor belt, the rising speed of the tight edge tension at the beginning of the conveyor, the fluctuation of the tension between the head and the edge of the conveyor when the tail is self-moving are all positively correlated with the elastic modulus of the conveyor belt. The maximum displacement of the moving trolley is negatively correlated with the elastic modulus of the conveyor belt, and the peak value of the tight edge tension of the head is independent of the elastic modulus of the conveyor belt. The bigger the rheological constant of conveyor belt, the more obvious the buffer effect to tension impact. The larger the ratio of viscous friction to the total friction is, the smaller the peak value of the tight edge tension is, the more stable the tension is, and the smaller the velocity fluctuation of the tail conveyor belt is.
【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】：2015
【分類號】：TD528.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 朱愛華;朱成九;張衛(wèi)華;;滾動軸承摩擦力矩的計(jì)算分析[J];軸承;2008年07期

2 宋偉剛,鄧永勝,郭立新;帶式輸送機(jī)停機(jī)動態(tài)過程的計(jì)算機(jī)仿真[J];東北大學(xué)學(xué)報(bào);2002年10期

3 于光;侯建濤;;新型礦用水-乙二醇型難燃液壓液在煤礦中的應(yīng)用[J];潔凈煤技術(shù);2012年02期

4 王繁生;侯友夫;蔣紅旗;;帶式輸送機(jī)動態(tài)分析方法研究進(jìn)展[J];礦山機(jī)械;2009年09期

5 李保春;帶式輸送機(jī)自動拉緊裝置的計(jì)算方法[J];煤礦機(jī)電;2005年02期

6 宋偉剛,趙琛;帶式輸送機(jī)阻力隨帶速變化規(guī)律性的實(shí)驗(yàn)研究[J];煤礦機(jī)械;2001年03期

7 戴建立;;帶式輸送機(jī)自動張緊裝置的現(xiàn)狀及研究[J];煤礦機(jī)械;2007年11期

8 王繼勇;王萍;劉姍姍;于維雨;賈大軍;;煤礦設(shè)備用液壓液的著火分析及安全評估管理[J];煤炭工程;2010年07期

9 宗勇,宗敏;法國A型膠帶輸送機(jī)液壓張緊裝置分析[J];煤炭科學(xué)技術(shù);1997年03期

10 李玉瑾;帶式輸送機(jī)的動態(tài)特性分析與軟起動設(shè)計(jì)[J];煤炭學(xué)報(bào);2002年03期

相關(guān)博士學(xué)位論文 前1條

1 董大仟;大型帶式輸送機(jī)動態(tài)特性研究及其應(yīng)用[D];華北電力大學(xué)（北京）;2008年

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