本文關(guān)鍵詞：滾子夾套式回轉(zhuǎn)支承輪壓均衡方法研究　出處：《大連理工大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 滾子夾套式回轉(zhuǎn)支承 輪壓 均衡化 有限元分析

【摘要】：隨著海洋經(jīng)濟(jì)的快速發(fā)展,大型海洋起重設(shè)備的開(kāi)發(fā)作為大多數(shù)海洋工程的配套工程越來(lái)越受到重視,滾子夾套式回轉(zhuǎn)支承因具有結(jié)構(gòu)緊湊,重心位置低,承載能力大等諸多優(yōu)點(diǎn)成為大型海洋起重設(shè)備最常用的回轉(zhuǎn)支承類型,但這種類型的回轉(zhuǎn)支承裝置存在著一個(gè)顯著的缺點(diǎn),就是承載時(shí)各滾輪間壓力分布很不均勻,這造成工作狀態(tài)下有些滾輪承載過(guò)大,而有些滾輪幾乎不受力,影響整機(jī)的安全性以及回轉(zhuǎn)支承的使用壽命。 本文以與國(guó)內(nèi)某重工企業(yè)合作開(kāi)展的研究性項(xiàng)目為依托,以大型海洋平臺(tái)起重機(jī)滾子夾套式回轉(zhuǎn)支承為研究對(duì)象,以有限元軟件ANSYS和APDL為主要研究工具,分別從調(diào)整回轉(zhuǎn)支承結(jié)構(gòu)剛度分布和調(diào)整回轉(zhuǎn)軌道不平度兩條路徑出發(fā),研究解決滾子夾套式回轉(zhuǎn)支承輪壓分布不均衡問(wèn)題的方法。 本文首先研究了回轉(zhuǎn)支承結(jié)構(gòu)剛度分布對(duì)輪壓均衡度的影響,基于有限元軟件ANSYS建立了包括輪軌接觸系統(tǒng)在內(nèi)的回轉(zhuǎn)支承有限元模型,通過(guò)改變回轉(zhuǎn)支承轉(zhuǎn)盤(pán)內(nèi)部筋板的布置方向、布置位置、筋板形狀和厚度等方式改變回轉(zhuǎn)支承結(jié)構(gòu)的剛度分布,分析比較各有限元模型計(jì)算所得的輪壓值,從中找出對(duì)輪壓分布最有利的回轉(zhuǎn)支承結(jié)構(gòu)形式。研究表明,較有利于輪壓均衡分布的筋板布置方式為實(shí)心的筋板沿著回轉(zhuǎn)軌道圓周方向均勻地分布于滾輪軌道正上方。 然后研究了在固定的回轉(zhuǎn)支承結(jié)構(gòu)形式下,回轉(zhuǎn)軌道不平度對(duì)輪壓均衡度的影響。在有限元軟件中,通過(guò)調(diào)整回轉(zhuǎn)軌道輪軌接觸區(qū)域的強(qiáng)制位移量的方式模擬調(diào)整回轉(zhuǎn)軌道不平度。為實(shí)現(xiàn)計(jì)算機(jī)循環(huán)迭代自動(dòng)計(jì)算出實(shí)現(xiàn)輪壓均衡所需調(diào)整的軌道位移量,編寫(xiě)了若干APDL程序,研究結(jié)果表明通過(guò)該方法在有限元軟件中可以實(shí)現(xiàn)輪壓均衡。為驗(yàn)證調(diào)整回轉(zhuǎn)軌道不平度實(shí)現(xiàn)輪壓均衡的有限元方法的可行性,專門(mén)設(shè)計(jì)了驗(yàn)證性試驗(yàn)并進(jìn)行了實(shí)物模型現(xiàn)場(chǎng)測(cè)試,試驗(yàn)結(jié)果表明以該有限元方法指導(dǎo)調(diào)整回轉(zhuǎn)軌道不平度可以顯著改善輪壓分布,證明該方法是可行的。 最后本文分析比較了兩種方法各自的特點(diǎn),并結(jié)合算例說(shuō)明了如何將兩種方法結(jié)合應(yīng)用以達(dá)到最佳的輪壓均衡效果。 本文的研究成果為滾子夾套式回轉(zhuǎn)支承相關(guān)工程設(shè)計(jì)人員提供了一種全新的設(shè)計(jì)思路和一種基于有限元軟件的便捷又可行的方法,具有實(shí)際的工程應(yīng)用價(jià)值。
[Abstract]:With the rapid development of marine economy, the development of large marine hoisting equipment as the supporting engineering of most ocean projects has been paid more and more attention. The roller clamped slewing bearing has compact structure and low center of gravity. Many advantages, such as large bearing capacity, have become the most commonly used type of slewing support for large marine hoisting equipment, but this type of rotary support device has a significant disadvantage. The pressure distribution between the rollers is very uneven, which causes some rollers to bear too much load in the working state, while some rollers almost do not bear the force, which affects the safety of the whole machine and the service life of the slewing support. In this paper, based on the research project carried out in cooperation with a domestic heavy industry enterprise, the roller clamp slewing bearing of large offshore platform crane is taken as the research object. With the finite element software ANSYS and APDL as the main research tools, two paths of adjusting the stiffness distribution of the slewing bearing structure and adjusting the irregularity of the track are set out respectively. The method to solve the problem of uneven pressure distribution of roller clamping slewing bearing is studied. In this paper, the influence of the stiffness distribution of the slewing bearing structure on the wheel pressure balance is studied, and the finite element model of the slewing bearing including wheel-rail contact system is established based on the finite element software ANSYS. The stiffness distribution of the rotary support structure is changed by changing the arrangement direction, position, shape and thickness of the rotating support plate, and the wheel pressure values calculated by each finite element model are analyzed and compared. The structure form of rotary bearing which is most favorable to the distribution of wheel pressure is found out. The stiffened plate, which is more favorable to the uniform distribution of wheel pressure, is uniformly distributed along the circumferential direction of the rotary track along the straight top of the rolling wheel track. Then, the influence of the unevenness of the track on the wheel pressure equalization under the fixed structure of the slewing bearing is studied. In the finite element software. By adjusting the forced displacement of the wheel-rail contact area of the rotary track, the adjustment of the rotational track irregularity is simulated. In order to realize the computer cycle iteration, the track displacement which needs to be adjusted to realize the wheel pressure equalization is automatically calculated. Some APDL programs have been written, and the results show that the method can realize wheel pressure equalization in finite element software, and to verify the feasibility of the finite element method to adjust the rotation track irregularity to achieve wheel pressure equalization. The confirmatory test was designed and the field test of the physical model was carried out. The experimental results show that the wheel pressure distribution can be significantly improved by using the finite element method to guide the adjustment of the unevenness of the rotary track, and it is proved that the method is feasible. Finally, the characteristics of the two methods are analyzed and compared, and an example is given to illustrate how to apply the two methods in order to achieve the best wheel pressure equalization effect. The research results of this paper provide a new design idea and a convenient and feasible method based on finite element software for the related engineering designers of roller clamped slewing bearing. It has practical application value.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH21;TH133.3

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 李迎武;3000噸級(jí)履帶起重機(jī)回轉(zhuǎn)支承與臺(tái)車(chē)架的載荷分配研究[D];大連理工大學(xué);2012年

2 劉威;大型浮式起重機(jī)滑動(dòng)式回轉(zhuǎn)支承結(jié)構(gòu)優(yōu)化研究[D];大連理工大學(xué);2013年

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本文編號(hào)：1419075