3000吨级履带起重机回转支承与台车架的载荷分配研究

发布时间：2018-07-08 08:24

本文选题：履带起重机 + 回转支承　；参考：《大连理工大学》2012年硕士论文

【摘要】：随着水利、风电、石化及第三代核电建设的发展,超大吨位履带起重机的设计越来越受到重视,而回转支承装置的设计是其设计的一个重点。目前,双臂架超大吨位履带起重机的回转支承装置由左右台车架、回转支承、后台车架组成。通过左右台车架承受部分载荷,减少了回转支承承受的载荷；可保证在运输尺寸要求的前提下,设计出满足使用要求的回转支承。此种回转支承装置,回转支承和台车架承受的载荷无法用常规的解析计算求出,车架刚度、转台刚度的变化会影响二者载荷的分配。本文首先介绍了履带起重机的回转形式和回转支承的选型及计算。然后以大连理工大学与徐工机械建设机械分公司合作开展的3600t履带起重机项目为依托,以其主机结构为研究对象,以有限元软件ANSYS和参数化设计语言APDL为主要研究工具,建立了上车和主机有限元模型。通过改变上车和主机有限元模型中前转台与中间连接体的铰点位置,分析铰点位置变化时回转支承与台车架的载荷分配；通过改变上车有限元模型中前转台前侧板的板厚分析前转台局部刚度变化时二者的载荷分配,改变上车有限元模型中回转支承下环板的竖向约束位移模拟车架刚度,分析车架刚度变化时二者的载荷分配,改变上车有限元模型中右台车轮下边缘节点的竖向约束位移模拟右台车架U形耳板连接处间隙变化,分析间隙变化时二者的载荷分配。研究表明,前转台和中间连接体连接铰点位置向中间移动,台车架所受的载荷增大,回转支承所受的载荷减小；前转台中间刚度和车架中心体刚度增加、右台车U形耳板处间隙增大,台车架所受的载荷减小,回转支承所受的载荷增加。本文对台车架和回转支承组合式回转支承装置载荷分配影响因素的分析总结,将对设计此种装置具有一定的指导意义,所提出的求解回转支承与台车架承受载荷的方法具有实际的工程应用价值。
[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.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH213.7

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