起重機減速器工作失效分析研究
發(fā)布時間：2019-01-27 09:13
【摘要】：減速器是起重機的重要部分,由于其失效會使得整機產(chǎn)生破壞,為了避免此類問題的發(fā)生,本文以MQ4599門座起重機起升機構(gòu)中的減速器高速軸為研究對象,以理論力學、有限元法、結(jié)構(gòu)力學、機械振動等理論知識為指導(dǎo),借助ANSYS有限元分析軟件,結(jié)合數(shù)學建模和計算機建模的方法,借鑒前人已有的研究成果,在此基礎(chǔ)上,對起重機減速器箱體整體進行分析,找出其薄弱結(jié)構(gòu),并對其高速軸的失效影響因素分別進行研究,在實際工程運用中會有一定的意義,主要的研究內(nèi)容包括以下方面： (1)利用理論力學、材料力學知識,分析制動輪慣性力、軸不對中、制動器扭矩對減速器高速軸強度失效影響,建立了各量與高速軸強度的關(guān)系式。 (2)分析減速器高速軸在工作過程中,由于聯(lián)軸器、齒輪、制動輪等高速旋轉(zhuǎn)而具有很大的轉(zhuǎn)動慣量,在此情況下分析整個軸系的受力,建立系統(tǒng)的平衡方程,從而得出轉(zhuǎn)動慣量對高速軸失效的影響。 (3)對聯(lián)軸器不對中與電機軸與減速器高速軸不對中的情形進行研究,分別分析了慣性力和阻尼力對系統(tǒng)振動的影響,慣性力使系統(tǒng)產(chǎn)生彎曲振動,并且在接近軸承處的振動幅度要比遠離聯(lián)軸器處的振動強烈,阻尼力使系統(tǒng)產(chǎn)生扭轉(zhuǎn)振動,然而關(guān)于系統(tǒng)的扭轉(zhuǎn)振動,接近聯(lián)軸器軸承處的振動幅度要比遠離聯(lián)軸器軸承處的振動幅度要小。 (4)分析了高速軸上偏心圓盤對其失效的影響,偏心量越大,則使得軸的撓度越大：同時也研究了剛性聯(lián)軸器、撓性聯(lián)軸器和柔性聯(lián)軸器幾種不同類型聯(lián)軸器對減速器失效的影響程度,因為三者剛性的不同,使得臨界速度不同,對于實際工程運用中聯(lián)軸器的選取有一定的意義：最后簡單分析了軸承和底座對減速器失效的影響。 (5)借助ANSYS11.0軟件對特定的起重機減速器整個箱體進行實體建模,由于齒輪接觸模擬非常復(fù)雜,模型建立過程中將齒輪之間的接觸去掉,分別使用LINK10和BEAM4單元模擬軸承,對減速器箱體和軸進行了靜力分析,得出整個箱體的薄弱結(jié)構(gòu)出現(xiàn)在高速軸上,則在減速器工作過程中,最可能出現(xiàn)問題的地方是其高速軸,對前面理論分析起到一個驗證作用。
[Abstract]:The reducer is an important part of the crane. In order to avoid this kind of problem, the high speed shaft of the reducer in the lifting mechanism of the MQ4599 portal crane is taken as the research object, and the theoretical mechanics is taken as the research object. Under the guidance of theoretical knowledge of finite element method, structural mechanics and mechanical vibration, with the help of ANSYS finite element analysis software, combined with the methods of mathematical modeling and computer modeling, and drawing lessons from the previous research achievements, on this basis, This paper analyzes the whole body of the reducer box of the crane, finds out its weak structure, and studies the factors affecting the failure of its high-speed shaft respectively, which will be of certain significance in the practical engineering application. The main research contents are as follows: (1) based on the knowledge of theoretical mechanics and material mechanics, the influence of brake torque on the strength failure of high speed shaft of reducer is analyzed by analyzing the inertia force of brake wheel and shaft misalignment. The relationship between each quantity and the strength of high speed shaft is established. (2) it is analyzed that the high speed shaft of reducer has great moment of inertia due to the high speed rotation of coupling, gear and brake wheel. In this case, the force of the whole shaft system is analyzed, and the balance equation of the system is established. The influence of moment of inertia on the failure of high speed shaft is obtained. (3) the influence of inertia force and damping force on the vibration of the system is analyzed, and the bending vibration of the system is caused by the inertial force, and the misalignment of the coupling between the electrical shaft and the high speed shaft of the reducer is studied, and the influence of the inertia force and damping force on the vibration of the system is analyzed respectively. And the amplitude of the vibration near the bearing is stronger than the vibration far away from the coupling. The damping force causes the system to produce torsional vibration. However, with regard to the torsional vibration of the system, The vibration amplitude near the coupling bearing is smaller than that near the coupling bearing. (4) the influence of eccentric disk on the failure of high speed shaft is analyzed. The greater the eccentricity, the bigger the deflection of shaft. At the same time, the rigid coupling is also studied. The influence of flexible coupling and flexible coupling on the failure of reducer, because of the different rigidity, the critical speed is different. It has a certain significance for the selection of coupling in practical engineering. Finally, the influence of bearing and base on reducer failure is simply analyzed. (5) using ANSYS11.0 software to model the whole box of a specific crane reducer. Because the contact simulation of gear is very complicated, the contact between gears is removed in the process of establishing the model, and the bearing is simulated by LINK10 and BEAM4 element, respectively. The static analysis of the reducer box and shaft shows that the weak structure of the whole box appears on the high-speed shaft, and the most likely problem in the working process of the reducer is its high-speed shaft. To the previous theoretical analysis plays a role in verification.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH21
本文編號：2416124
[Abstract]:The reducer is an important part of the crane. In order to avoid this kind of problem, the high speed shaft of the reducer in the lifting mechanism of the MQ4599 portal crane is taken as the research object, and the theoretical mechanics is taken as the research object. Under the guidance of theoretical knowledge of finite element method, structural mechanics and mechanical vibration, with the help of ANSYS finite element analysis software, combined with the methods of mathematical modeling and computer modeling, and drawing lessons from the previous research achievements, on this basis, This paper analyzes the whole body of the reducer box of the crane, finds out its weak structure, and studies the factors affecting the failure of its high-speed shaft respectively, which will be of certain significance in the practical engineering application. The main research contents are as follows: (1) based on the knowledge of theoretical mechanics and material mechanics, the influence of brake torque on the strength failure of high speed shaft of reducer is analyzed by analyzing the inertia force of brake wheel and shaft misalignment. The relationship between each quantity and the strength of high speed shaft is established. (2) it is analyzed that the high speed shaft of reducer has great moment of inertia due to the high speed rotation of coupling, gear and brake wheel. In this case, the force of the whole shaft system is analyzed, and the balance equation of the system is established. The influence of moment of inertia on the failure of high speed shaft is obtained. (3) the influence of inertia force and damping force on the vibration of the system is analyzed, and the bending vibration of the system is caused by the inertial force, and the misalignment of the coupling between the electrical shaft and the high speed shaft of the reducer is studied, and the influence of the inertia force and damping force on the vibration of the system is analyzed respectively. And the amplitude of the vibration near the bearing is stronger than the vibration far away from the coupling. The damping force causes the system to produce torsional vibration. However, with regard to the torsional vibration of the system, The vibration amplitude near the coupling bearing is smaller than that near the coupling bearing. (4) the influence of eccentric disk on the failure of high speed shaft is analyzed. The greater the eccentricity, the bigger the deflection of shaft. At the same time, the rigid coupling is also studied. The influence of flexible coupling and flexible coupling on the failure of reducer, because of the different rigidity, the critical speed is different. It has a certain significance for the selection of coupling in practical engineering. Finally, the influence of bearing and base on reducer failure is simply analyzed. (5) using ANSYS11.0 software to model the whole box of a specific crane reducer. Because the contact simulation of gear is very complicated, the contact between gears is removed in the process of establishing the model, and the bearing is simulated by LINK10 and BEAM4 element, respectively. The static analysis of the reducer box and shaft shows that the weak structure of the whole box appears on the high-speed shaft, and the most likely problem in the working process of the reducer is its high-speed shaft. To the previous theoretical analysis plays a role in verification.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH21
【參考文獻】
相關(guān)期刊論文 前10條
1 何鳳生,劉紅文,倪進飛;臺山電廠橋式起重機減速器輸出軸斷裂原因分析[J];廣東電力;2003年06期
2 劉海燕;;淺論新型減速器在港口起重機上的應(yīng)用[J];港口科技動態(tài);2004年06期
3 李玉萍;;基于Pro/E的減速器大齒輪三維建模及參數(shù)化設(shè)計[J];機械設(shè)計與研究;2007年03期
4 林遠東;;偏心質(zhì)量引起旋轉(zhuǎn)系統(tǒng)振動的動力學研究[J];機械設(shè)計與制造;2008年05期
5 姚海明;王會剛;劉偉;張偉杰;;基于ANSYS主減速器殼應(yīng)力及模態(tài)分析[J];機械設(shè)計與制造;2010年03期
6 張松林;機械產(chǎn)品兩種模塊化設(shè)計方法[J];交通與計算機;2001年03期
7 王劍彬;萬軍;尹吉淑;;擺動活齒減速器虛擬設(shè)計與運動仿真[J];機械傳動;2009年04期
8 李興凱;;抓斗起重機提升減速器故障淺析[J];機電工程技術(shù);2009年05期
9 李明;齒輪聯(lián)軸器不對中轉(zhuǎn)子系統(tǒng)的穩(wěn)態(tài)振動特征分析[J];機械強度;2002年01期
10 梁尚明,羅偉,徐俊光,徐禮鉅;擺動活齒減速器的有限元模態(tài)分析[J];機械設(shè)計;2004年07期
相關(guān)碩士學位論文 前1條
1 李芳;大型起重機變幅水平位移差動減速器補償研究[D];武漢理工大學;2010年
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