【摘要】：軋機(jī)主傳動(dòng)系統(tǒng)是由一些慣性元件和彈性元件構(gòu)成的“質(zhì)量彈簧系統(tǒng)”,穩(wěn)定工作時(shí)主傳動(dòng)系統(tǒng)不發(fā)生扭振,但當(dāng)生產(chǎn)中負(fù)荷擾動(dòng)(如咬鋼,拋鋼,啟動(dòng),變速等)時(shí),系統(tǒng)會(huì)產(chǎn)生不穩(wěn)定的瞬態(tài)扭轉(zhuǎn)沖擊振動(dòng)現(xiàn)象,由此引發(fā)的事故也是頻繁發(fā)生,因此研究軋機(jī)主動(dòng)系統(tǒng)的扭振現(xiàn)象可以更好的認(rèn)識(shí)其發(fā)生的本質(zhì),為主傳動(dòng)系統(tǒng)設(shè)計(jì)、優(yōu)化和降低扭振水平提供理論支持。 軋機(jī)減速機(jī)又是傳動(dòng)系統(tǒng)中關(guān)鍵設(shè)備之一,其工作特點(diǎn)是低速、重載、沖擊負(fù)荷大、沖擊次數(shù)頻繁,要求軋機(jī)齒輪傳動(dòng)系統(tǒng)具有足夠的承載能力。它性能的好壞直接影響著整個(gè)系統(tǒng)的可靠性,在軋機(jī)工作過(guò)程中,齒輪系統(tǒng)同樣伴隨著軋機(jī)工作負(fù)荷擾動(dòng),不可避免會(huì)引起齒輪沖擊振動(dòng),不僅會(huì)影響自身傳動(dòng)的動(dòng)態(tài)特性,而且還會(huì)引起整個(gè)傳動(dòng)系統(tǒng)的振動(dòng)。因此研究軋機(jī)齒輪的動(dòng)力學(xué)特性有著重要的意義。本文從數(shù)值分析求解和有限元計(jì)算的角度出發(fā),對(duì)軋機(jī)減速機(jī)斜齒輪傳動(dòng)系統(tǒng)的動(dòng)態(tài)特性進(jìn)行分析。 本文以連續(xù)彈性碰撞理論和齒輪系統(tǒng)動(dòng)力學(xué)為支撐,以某鋼廠1580F2軋機(jī)為算例,首先使用ANSYS/LS-DYNA顯示動(dòng)力學(xué)分析軟件及LS-PREPOST后處理器,建立單個(gè)軋機(jī)減速器斜齒輪副3D分析模型,計(jì)算沖擊載荷激勵(lì)下的沖擊動(dòng)應(yīng)力及變形情況,并與傳統(tǒng)國(guó)標(biāo)法計(jì)算得出的齒輪動(dòng)應(yīng)力相互驗(yàn)證結(jié)果的準(zhǔn)確性,綜合比較在不同起步轉(zhuǎn)速、啟動(dòng)時(shí)間及外載荷咬鋼時(shí)間等常見(jiàn)擾動(dòng)工況下斜齒輪系統(tǒng)的承載能力和動(dòng)態(tài)特性,以及沖擊應(yīng)力波在齒輪中的傳播圖像,為減速機(jī)傳動(dòng)系統(tǒng)的設(shè)計(jì)優(yōu)化提供參考。 其次針對(duì)負(fù)荷擾動(dòng)引起的軋機(jī)沖擊扭振,采用集中參數(shù)法和影響系數(shù)法建立考慮輪齒嚙合剛度、齒輪誤差、齒輪間隙等因素的軋機(jī)傳動(dòng)系統(tǒng)分支式動(dòng)力學(xué)模型和簡(jiǎn)化的扭振數(shù)學(xué)模型,利用MATLAB軟件中的龍格-庫(kù)塔數(shù)值計(jì)算方法,對(duì)斜坡咬鋼和階躍咬鋼沖擊過(guò)程進(jìn)行數(shù)值求解分析,得出沖擊載荷作用下軋機(jī)齒輪系統(tǒng)的動(dòng)態(tài)扭矩響應(yīng)曲線和扭矩放大系數(shù)TAF,判定扭振發(fā)生時(shí)傳動(dòng)系統(tǒng)的最大動(dòng)力載荷,并研究分析鋼坯不同咬入時(shí)間和咬鋼方式對(duì)齒輪傳動(dòng)系統(tǒng)動(dòng)力學(xué)沖擊特性的影響,得出抑制沖擊扭振的方法。
[Abstract]:The main drive system of the rolling mill is a "mass spring system" consisting of some inertial and elastic elements. The main transmission system does not take place torsional vibration when it works stably, but when the production is disturbed by load (such as steel biting, throwing, starting, changing speed, etc.), the rolling mill main transmission system is a "mass spring system" composed of some inertial and elastic elements. The system will produce unstable transient torsional shock vibration phenomenon, and the accidents caused by this phenomenon will also occur frequently. Therefore, the study of torsional vibration phenomenon in the active system of rolling mill can better understand the essence of its occurrence, and the main transmission system design is given priority to. Optimization and reduction of torsional vibration provide theoretical support. The speed reducer of rolling mill is one of the key equipments in the transmission system, which is characterized by low speed, heavy load, large impact load and frequent impact times. The gear transmission system of rolling mill is required to have sufficient bearing capacity. Its performance has a direct impact on the reliability of the whole system. In the rolling mill operation process, the gear system is also accompanied by the mill workload disturbance, which inevitably results in gear shock vibration, which not only affects the dynamic characteristics of its own transmission, but also affects the dynamic characteristics of its own transmission. It also causes the vibration of the whole transmission system. Therefore, it is of great significance to study the dynamic characteristics of rolling mill gears. From the angle of numerical analysis and finite element calculation, the dynamic characteristics of helical gear transmission system of mill reducer are analyzed in this paper. Based on the continuous elastic collision theory and gear system dynamics, this paper takes a steel mill 1580F2 as an example. Firstly, the ANSYS/LS-DYNA display dynamics analysis software and the LS-PREPOST post-processor are used. The 3D analysis model of helical gear pair of single mill reducer is established to calculate the impact dynamic stress and deformation under the impact load excitation, and the accuracy of the results is verified with the calculation of gear dynamic stress by traditional national standard method. The load carrying capacity and dynamic characteristics of bevel gear system under different starting speed, starting time and steel biting time of external load are comprehensively compared, as well as the propagation image of impact stress wave in gear. It provides a reference for the design and optimization of the drive system of the reducer. Secondly, aiming at the impact torsional vibration of rolling mill caused by load disturbance, the lumped parameter method and the influence coefficient method are used to establish the gear tooth meshing stiffness and gear error. By means of Runge-Kutta numerical calculation method in MATLAB software, the impact process of slope bite and step bite steel is numerically solved and analyzed by means of branch dynamics model and simplified torsional vibration mathematical model of rolling mill transmission system with gear clearance and other factors. The dynamic torque response curve and the torque magnification factor (TAF,) of the rolling mill gear system under the impact load are obtained to determine the maximum dynamic load of the transmission system when the torsional vibration occurs. The influence of different piercing time and biting mode on the dynamic impact characteristics of the gear transmission system is studied and analyzed, and the method to restrain the impact torsional vibration is obtained.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TG333;TH113.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周建剛;任學(xué)平;;熱帶鋼連軋機(jī)主傳動(dòng)系統(tǒng)的動(dòng)態(tài)研究[J];鞍鋼技術(shù);2007年01期

2 李志強(qiáng);韓志勇;安寧;;體現(xiàn)軋機(jī)功率需求主動(dòng)性的周期性沖擊負(fù)荷模型[J];電網(wǎng)技術(shù);2011年12期

3 朱才朝,蔣祖信,李以農(nóng),謝永春;1450精軋機(jī)組主傳動(dòng)系統(tǒng)扭振測(cè)試分析[J];重慶大學(xué)學(xué)報(bào)(自然科學(xué)版);2002年01期

4 王超;邵朋禮;;基于LS_DYNA的齒輪傳動(dòng)有限元?jiǎng)恿W(xué)分析仿真[J];計(jì)算機(jī)輔助工程;2010年02期

5 陳昌明,陳瑩瑩,李真,廉錫剛;初軋機(jī)主傳動(dòng)系統(tǒng)的扭轉(zhuǎn)振動(dòng)[J];金屬學(xué)報(bào);1985年05期

6 佟景偉,徐步青,李林安,沈珉,Bruno Picasso;沖擊載荷作用下齒輪動(dòng)應(yīng)力的研究[J];機(jī)械強(qiáng)度;2002年01期

7 李平,劉曉星;HC軋機(jī)主傳動(dòng)扭振系統(tǒng)的建模及其動(dòng)態(tài)性能的研究[J];昆明理工大學(xué)學(xué)報(bào)(理工版);2004年02期

8 江榮貴;胡青春;;斜齒圓柱齒輪嚙合剛度的一種簡(jiǎn)化計(jì)算[J];機(jī)械;2005年12期

9 劉鵬飛;黃永強(qiáng);;基于ANSYS的漸開線斜齒圓柱齒輪參數(shù)化建模研究[J];機(jī)械;2006年S1期

10 趙鑫;梁義維;李珊珊;;基于LS-DYNA的斜齒輪動(dòng)力學(xué)接觸仿真分析[J];機(jī)械工程與自動(dòng)化;2009年03期

，

本文編號(hào)：2435268