本文選題：履帶起重機(jī) + 回轉(zhuǎn)支承��； 參考：《大連理工大學(xué)》2012年碩士論文

【摘要】：隨著水利、風(fēng)電、石化及第三代核電建設(shè)的發(fā)展,超大噸位履帶起重機(jī)的設(shè)計(jì)越來(lái)越受到重視,而回轉(zhuǎn)支承裝置的設(shè)計(jì)是其設(shè)計(jì)的一個(gè)重點(diǎn)。 目前,雙臂架超大噸位履帶起重機(jī)的回轉(zhuǎn)支承裝置由左右臺(tái)車(chē)架、回轉(zhuǎn)支承、后臺(tái)車(chē)架組成。通過(guò)左右臺(tái)車(chē)架承受部分載荷,減少了回轉(zhuǎn)支承承受的載荷；可保證在運(yùn)輸尺寸要求的前提下,設(shè)計(jì)出滿(mǎn)足使用要求的回轉(zhuǎn)支承。此種回轉(zhuǎn)支承裝置,回轉(zhuǎn)支承和臺(tái)車(chē)架承受的載荷無(wú)法用常規(guī)的解析計(jì)算求出,車(chē)架剛度、轉(zhuǎn)臺(tái)剛度的變化會(huì)影響二者載荷的分配。 本文首先介紹了履帶起重機(jī)的回轉(zhuǎn)形式和回轉(zhuǎn)支承的選型及計(jì)算。然后以大連理工大學(xué)與徐工機(jī)械建設(shè)機(jī)械分公司合作開(kāi)展的3600t履帶起重機(jī)項(xiàng)目為依托,以其主機(jī)結(jié)構(gòu)為研究對(duì)象,以有限元軟件ANSYS和參數(shù)化設(shè)計(jì)語(yǔ)言APDL為主要研究工具,建立了上車(chē)和主機(jī)有限元模型。通過(guò)改變上車(chē)和主機(jī)有限元模型中前轉(zhuǎn)臺(tái)與中間連接體的鉸點(diǎn)位置,分析鉸點(diǎn)位置變化時(shí)回轉(zhuǎn)支承與臺(tái)車(chē)架的載荷分配；通過(guò)改變上車(chē)有限元模型中前轉(zhuǎn)臺(tái)前側(cè)板的板厚分析前轉(zhuǎn)臺(tái)局部剛度變化時(shí)二者的載荷分配,改變上車(chē)有限元模型中回轉(zhuǎn)支承下環(huán)板的豎向約束位移模擬車(chē)架剛度,分析車(chē)架剛度變化時(shí)二者的載荷分配,改變上車(chē)有限元模型中右臺(tái)車(chē)輪下邊緣節(jié)點(diǎn)的豎向約束位移模擬右臺(tái)車(chē)架U形耳板連接處間隙變化,分析間隙變化時(shí)二者的載荷分配。研究表明,前轉(zhuǎn)臺(tái)和中間連接體連接鉸點(diǎn)位置向中間移動(dòng),臺(tái)車(chē)架所受的載荷增大,回轉(zhuǎn)支承所受的載荷減��；前轉(zhuǎn)臺(tái)中間剛度和車(chē)架中心體剛度增加、右臺(tái)車(chē)U形耳板處間隙增大,臺(tái)車(chē)架所受的載荷減小,回轉(zhuǎn)支承所受的載荷增加。 本文對(duì)臺(tái)車(chē)架和回轉(zhuǎn)支承組合式回轉(zhuǎn)支承裝置載荷分配影響因素的分析總結(jié),將對(duì)設(shè)計(jì)此種裝置具有一定的指導(dǎo)意義,所提出的求解回轉(zhuǎn)支承與臺(tái)車(chē)架承受載荷的方法具有實(shí)際的工程應(yīng)用價(jià)值。
[Abstract]:With the development of water conservancy, wind power, petrochemical and third-generation nuclear power construction, more and more attention has been paid to the design of super-large tonnage crawler crane. At present, the slewing support device of the double arm crane is composed of the left and right frame, the rotary support and the backstage frame. Through the left and right frame bearing part of the load, reduce the load bearing, can ensure that under the transport size requirements, designed to meet the requirements of the use of slewing bearings. The load of this kind of slewing support, slewing bearing and platform frame can not be calculated by conventional analytical calculation. The change of frame stiffness and turntable stiffness will affect the distribution of load between them. This paper first introduces the rotary form of crawler crane and the selection and calculation of slewing support. Then, based on the project of 3600t crawler crane developed by Dalian University of Technology and Xugong Machinery Construction Machinery Branch, taking the main structure of the crane as the research object, the finite element software ANSYS and the parametric design language APDL are taken as the main research tools. The finite element model of boarding and main engine is established. By changing the hinge position between the front turntable and the middle connection in the finite element model of the vehicle and the host, the load distribution between the rotary support and the platform frame is analyzed when the hinge position changes. By changing the plate thickness of the front side plate of the front turntable in the finite element model of the vehicle, the load distribution of the two elements when the local stiffness of the front turntable changes, and the vertical constrained displacement of the annular plate under the slewing support in the finite element model of the car is changed to simulate the frame stiffness. The load distribution of the two is analyzed when the stiffness of the frame is changed. The vertical constrained displacement of the lower edge node of the right wheel in the finite element model of the car is changed to simulate the gap change at the U-shaped ear-plate joint of the right frame, and the load distribution between the two is analyzed when the gap changes. The results show that the load on the frame increases and the load on the slewing support decreases, while the intermediate stiffness of the front turntable and the center body of the frame increase. The gap at the U-shaped ear plate of the right car increases, the load on the frame decreases and the load on the slewing support increases. In this paper, the analysis and summary of the factors affecting the load distribution of the platform frame and the combined slewing bearing device with slewing support will be of certain guiding significance to the design of this kind of device. The proposed method for solving the load bearing of slewing support and platform frame 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】：2012
【分類(lèi)號(hào)】：TH213.7

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