超大型履带起重机起升系统研究及其优化

发布时间：2018-03-15 01:29

本文选题：超大型　切入点：履带起重机　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着社会和科技的发展与进步,整体吊装已经成为工程建设中不可或缺的重要角色。由于超大型履带起重机具备其他起重机械所不具备的诸多优点,凸显其重要性和必要性,决定了必然越来越受到各行各业的重视和青睐。作为起重机械,起升系统稳定性和安全性尤为重要。在起升系统中,对安全性影响较大的问题之一是二次起升的防下滑问题,二次起升过程性能直接影响着整机的工作性能和寿命。由于本文研究的超大型履带起重机采用闭式系统,使得该问题比其他中小型或者采用开式系统的起重机更为明显。目前,超大型履带起重机该问题的研究,国内要落后于国外,相应文献和资料也较少。本文就该问题提出一种对于二次起升防下滑的解决方案,并通过理论和仿真分析进行起升系统的研究和优化,为实际开发中提高起升系统动态特性性能提供理论指导和参考。第一章,在查阅大量国内外有关起重机起升系统二次起升问题的研究文献的基础上,介绍国内外履带起重机生产以及应用的概况,二次起升问题的普遍性,以及国内外对于二次起升问题的研究现状和解决方案。并进一步对比分析超大型履带起重机二次起升问题与文献资料中问题的相通之处和独特之处,从而提出了本课题的研究内容和意义。第二章,设计超大型履带起重机起升系统的电液控制系统,并介绍起升系统各部分工作原理和控制方案。根据实际工况,确定起升系统关键参数,并选取关键元件。第三章,通过数学建模和理论分析的方法,研究电液控制系统中,元件以及参数设置对于起升系统综合性能的影响,并进行理论计算和优化。第四章,基于仿真软件AMESim,建立起升系统的液压模型,对前一章理论分析结果进行仿真分析和结果优化。第五章,总结本课题完成工作以及不足之处,并对以后超大型履带起重机的起升系统研究以及优化工作提出展望。
[Abstract]:With the development and progress of society and science and technology, integral hoisting has become an indispensable and important role in engineering construction. As a lifting appliance, the stability and safety of hoisting system are very important. One of the problems that have a great influence on safety in hoisting system is the anti-slide problem of secondary hoisting. The performance of secondary hoisting process directly affects the working performance and life of the whole machine. Because the super large crawler crane studied in this paper uses closed system, the problem is more obvious than that of other cranes with medium or small size or open system. The research on this problem of super-large crawler crane is lagging behind that of foreign countries, and the corresponding literature and data are also relatively few. This paper puts forward a solution to this problem, which is to prevent the secondary hoisting from sliding. Through theoretical and simulation analysis, the research and optimization of hoisting system are carried out, which provides theoretical guidance and reference for improving the dynamic characteristics of hoisting system in practical development. In the first chapter, on the basis of consulting a large number of domestic and foreign literatures on the secondary hoisting problem of crane hoisting system, the general situation of production and application of crawler crane at home and abroad, the universality of secondary hoisting problem are introduced. As well as the domestic and foreign research status and solutions for the secondary hoisting problem. Furthermore, the similarities and uniqueness between the secondary hoisting problem of super-large crawler crane and the problems in the literature are compared and analyzed. Thus, the research content and significance of this subject are put forward. In the second chapter, the electro-hydraulic control system of the lifting system of super-large crawler crane is designed, and the working principle and control scheme of each part of the lifting system are introduced. According to the actual working conditions, the key parameters of the lifting system are determined, and the key components are selected. In the third chapter, through mathematical modeling and theoretical analysis, the effects of components and parameters on the overall performance of the hoisting system are studied, and the theoretical calculation and optimization are carried out. In chapter 4th, the hydraulic model of the lifting system is established based on the simulation software AMESim. the theoretical analysis results of the previous chapter are simulated and optimized. In chapter 5th, the paper summarizes the work and shortcomings of this subject, and puts forward the prospect of the research and optimization of the lifting system of super large crawler crane in the future.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH213.7

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