某大吨位全地面起重机塔式副臂起臂静力学研究

发布时间：2018-06-13 03:23

本文选题：全地面起重机 + 塔式副臂　；参考：《吉林大学》2017年硕士论文

【摘要】：改革开放后,中国的基础设施、能源等建设发展迅速,使国内起重机产业需求不断扩大。随着工程建设要求的提高,机动性能优越的全地面起重机逐步向大吨位方向发展,以满足更多的吊装工况需求。随着全地面起重机设计吨位越来越大,臂架结构自重越来越大,导致起重机发生事故的几率越来越大,包括倾翻事故、钢丝绳折断、起重臂折臂断裂事故、安全防护装置失灵等。起重机起臂过程是起重机所有后续正常作业的先决条件,因此,研究起臂工况计算,对减少事故和人员伤亡,具有十分重要意义。本文首先对大吨位全地面起重机的主要结构进行了简要说明,对塔式副臂起臂过程中独有的结构进行了阐述并介绍了塔式副臂起臂的两种形式及其区别。分析塔臂起臂的运动过程和受力特点,建立塔臂有限元模型,通过编制有限元计算程序,实现整个起臂过程计算。以变幅油缸受力、支腿受力、伸缩油缸受力、回转支撑受力、臂架强度和起臂时的倾翻稳定性系数为评价指标,验证起重机在不同起升状态下是否能够正常工作。最后通过有限元分析结果与实测数据进行对比,验证有限元分析的可靠性。两种起臂形式在伸缩油缸力、变幅油缸力、防倾油缸和防倾杆都满足设计要求;通过新配重表算出的回转支撑、倾翻系数和支腿反力也都满足设计要求。在结构强度方面在主臂+塔臂情况下形式一优于形式二,在带超起结构情况下形式二优于形式一;在伸缩油缸力、前倾翻决定的最小配重方面起臂形式二要优于起臂形式一;在最大配重方面形式一要优于形式二;而在其他包括变幅油缸力、防倾油缸和防倾杆、回转支撑等方面两种形式的差别并不大。
[Abstract]:After reform and opening up, China's infrastructure, energy construction and other rapid development, the domestic crane industry demand continues to expand. With the improvement of engineering construction requirements, the all-ground crane with superior maneuverability is gradually developing towards the direction of large tonnage to meet more requirements of hoisting conditions. As the design tonnage of all-ground cranes becomes larger and larger, the weight of the jib structure becomes larger and larger, which leads to more and more accidents of the crane, including the accident of overturning, the breakage of wire rope and the fracture of the arm of the lifting arm. Failure of safety protection devices, etc. The hoisting process of crane is the precondition of all follow-up normal operation of crane. Therefore, it is very important to study the calculation of jib working condition to reduce accidents and casualties. In this paper, the main structure of large-tonnage all-ground crane is introduced briefly, and the unique structure in the process of tower jib hoisting is expounded, and the two forms and their differences are introduced. Based on the analysis of the movement process and force characteristics of the tower arm, the finite element model of the tower arm is established, and the calculation of the whole starting process is realized by compiling the finite element calculation program. Taking the variable amplitude oil cylinder force, support leg force, telescopic oil cylinder force, rotary support force, arm strength and tipping stability coefficient of jib as evaluation indexes, it is verified whether the crane can work normally under different lifting conditions. Finally, the reliability of the finite element analysis is verified by comparing the finite element analysis results with the measured data. The two types of lifting arm can meet the design requirements in the retractive cylinder force, the variable amplitude cylinder force, the anti-dip cylinder and the anti-tilt rod, and the slewing support, the tipping coefficient and the leg reaction force calculated by the new counterweight meter also meet the design requirements. In the aspect of structural strength, form one is superior to form two in the case of main arm tower arm, form two is better than form one in case of overloading structure, and form two is better than form one in respect of the minimum weight determined by forward tipping and the force of telescopic oil cylinder. The first form is better than the second form in the aspect of maximum weight, but the difference between the two forms is not great in other aspects, such as the variable amplitude cylinder force, the anti-dip cylinder and the anti-dip rod, the rotary support and so on.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH21

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