本文選題：盾構(gòu)機(jī)　切入點(diǎn)：回轉(zhuǎn)支承　出處：《河南科技大學(xué)》2011年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：盾構(gòu)機(jī)是隧道施工中的主要施工機(jī)械,必須具有高可靠性,能夠穩(wěn)定地工作。盾構(gòu)機(jī)主軸承是盾構(gòu)機(jī)的關(guān)鍵部件,多采用三排滾柱式回轉(zhuǎn)支承,其結(jié)構(gòu)和受載情況復(fù)雜,容易產(chǎn)生較大的應(yīng)力和變形,影響盾構(gòu)機(jī)的施工安全。由于盾構(gòu)機(jī)主軸承的尺寸較大,滾動(dòng)體數(shù)目較多,所以?xún)?nèi)、外圈與滾動(dòng)體之間的接觸部位較多,接觸狀態(tài)復(fù)雜。理論方法和有限元法計(jì)算該軸承的承載能力、變形及載荷分布都非常復(fù)雜。 本文采用傳統(tǒng)軸承理論分析方法和有限元法分別對(duì)該軸承的承載能力、變形及載荷分布狀態(tài)進(jìn)行分析研究。首先分析了該軸承在靜載荷作用下三排滾動(dòng)體的受力狀態(tài),應(yīng)用滾動(dòng)軸承載荷分布計(jì)算方法,對(duì)軸承在軸向力、徑向力及傾覆力矩作用下的三列滾動(dòng)體的載荷分布進(jìn)行了計(jì)算。得出了每個(gè)受載滾子的載荷、最大接觸應(yīng)力及變形的值,并確定出每列滾動(dòng)體最大載荷滾子所在的位置。而后利用ANSYS有限元分析軟件,分別分析了軸承在軸向力、徑向力及傾覆力矩單獨(dú)作用下和聯(lián)合作用下的應(yīng)力及變形狀態(tài)。有限元分析得到的軸承載荷分布規(guī)律、應(yīng)力及變形的計(jì)算結(jié)果與滾動(dòng)軸承的理論計(jì)算結(jié)果基本接近。 由于盾構(gòu)機(jī)主軸承是低速重載回轉(zhuǎn)軸承,其損壞形式一般表現(xiàn)為疲勞斷裂。因此在軸承力學(xué)性能分析的基礎(chǔ)上,利用經(jīng)典的疲勞壽命分析理論和軸承疲勞壽命分析方法,結(jié)合該軸承實(shí)際結(jié)構(gòu),分析了軸承疲勞壽命。分析結(jié)果顯示,軸承的疲勞壽命滿(mǎn)足預(yù)期使用壽命。多工況下盾構(gòu)機(jī)主軸承力學(xué)性能的實(shí)驗(yàn)結(jié)果和理論分析結(jié)果在變化趨勢(shì)方面有很好的一致性。 通過(guò)對(duì)盾構(gòu)機(jī)主軸承的受力狀態(tài)和疲勞壽命的研究,以及對(duì)盾構(gòu)機(jī)主軸承的承載性能實(shí)驗(yàn),為盾構(gòu)機(jī)主軸承的選型和優(yōu)化設(shè)計(jì)奠定了基礎(chǔ)。
[Abstract]:Shield machine is the main construction machine in tunnel construction, it must have high reliability and be able to work stably. The main bearing of shield machine is the key part of shield machine. It is easy to produce large stress and deformation, which affects the construction safety of shield machine. Because the size of the main bearing of shield machine is large and the number of rolling body is more, there are more contact parts between the outer ring and the rolling body. The contact state is complicated. The bearing capacity, deformation and load distribution of the bearing are calculated by theoretical method and finite element method. In this paper, the bearing capacity, deformation and load distribution of the bearing are studied by using the traditional bearing theory analysis method and the finite element method. By using the method of load distribution calculation of rolling bearings, the load distribution of three series of rolling bodies under the action of axial force, radial force and overturning moment is calculated. The values of load, maximum contact stress and deformation of each loaded roller are obtained. The position of the maximum load roller for each row of rolling body is determined, and then the axial force of the bearing is analyzed by using ANSYS finite element analysis software. The stress and deformation state of bearing under the action of radial force and overturning moment separately and jointly. The results of stress and deformation calculation of bearing obtained by finite element analysis are close to the theoretical calculation results of rolling bearing. Because the main bearing of shield machine is low speed and heavy load rotary bearing, its damage form is generally manifested as fatigue fracture. Therefore, based on the analysis of bearing mechanical properties, the classical theory of fatigue life analysis and the fatigue life analysis method of bearing are used. Combined with the actual structure of the bearing, the fatigue life of the bearing is analyzed. The fatigue life of the bearing meets the expected service life. The experimental results of the mechanical properties of the main bearing of the shield machine under multiple working conditions are in good agreement with the theoretical analysis results in terms of the changing trend. Based on the study of the stress state and fatigue life of the main bearing of the shield machine and the experiment on the bearing capacity of the main bearing of the shield machine, the foundation has been laid for the selection and optimization design of the main bearing of the shield machine.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類(lèi)號(hào)】：TH133.33

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊曉蔚;提高滾動(dòng)軸承疲勞壽命的主要技術(shù)措施[J];軸承;2001年05期

2 劉橋方,嚴(yán)楓;我國(guó)軸承制造技術(shù)的現(xiàn)狀及其發(fā)展趨勢(shì)[J];軸承;2005年06期

3 徐躍進(jìn);;滾動(dòng)軸承的疲勞可靠性計(jì)算[J];軸承;2007年08期

4 汪洪;陳原;;轉(zhuǎn)盤(pán)軸承承載能力及額定壽命的計(jì)算方法[J];軸承;2008年02期

5 劉紅彬;馬偉;王秀君;李濟(jì)順;薛玉君;韓紅彪;;土壓平衡盾構(gòu)機(jī)主軸承力學(xué)性能分析[J];軸承;2010年07期

6 張鋼;殷慶振;阮娟;張雪;劉瑩;;交叉滾子軸承的疲勞壽命分析[J];軸承;2010年10期

7 于穎;徐寶富;奚鷹;宋木生;;軟土地基土壓平衡盾構(gòu)切削刀盤(pán)扭矩的計(jì)算[J];中國(guó)工程機(jī)械學(xué)報(bào);2004年03期

8 郭婧;;滾動(dòng)軸承疲勞壽命綜述[J];甘肅科技;2006年04期

9 劉源l，

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