102米液压多级缸云梯的分析研究

发布时间：2018-04-17 19:13

本文选题：液压 + 云梯　；参考：《山东大学》2012年硕士论文

【摘要】：随着城市的迅速发展,楼房建筑越来越高,在带来便利的同时,其火灾对人民的生命财产安全也产生了巨大的威胁。高层建筑一旦发生火灾,燃烧猛烈、蔓延途径多、火情控制难,易造成重大人员伤亡和财产损失。目前我国消防支队配备的大多数为国产消防车,其技术水平低,很难对高层建筑火灾展开有效的工作。国外高层消防车价格昂贵,很难在国内进行推广。针对这一问题,利用液压缸快速、稳定、精确的特点,设计一种新型液压多级缸云梯。围绕此项技术,本文做了如下的研究工作：首先,文章综述了目前城市发展过程中消防安全方面存在的问题,介绍了消防车的国内外发展现状,叙述了云梯消防车的特点及发展趋势,阐述了课题的研究意义。其次,文章叙述了消防车的组成部分,在参考国内外消防车的主要技术的基础上,利用现有云梯消防车底盘,对102m液压多级缸云梯车上部分进行结构设计根据其设计的高度和强度要求,设计了多级液压缸的分布方式及连接形式,确定了液压缸和连接卡箍的尺寸。再次,设计了液压多级缸云梯的液压系统。根据所提出的102m液压多级缸云梯的技术要求,对其液压系统的工作压力、流量、功率等参数进行了设计。针对液压多级缸云梯要求运行平稳的特点,选择了合适的同步液压缸。由于液压多级缸云梯的三根液压缸要求其同步性,因此在对比几种常见的同步回路优缺点的基础上,选择了适合云梯的同步回路。然后,根据风荷载理论,对液压多级缸云梯所受风力进行了相关计算。针对云梯受高空风力影响比较大的特点,参考现有文献,对液压多级缸云梯在风力作用下的响应情况作了分析,并且根据抗风计算手册,计算了液压多级缸云梯在风力作用下的稳定性。最后,根据结构设计的内容,对102m多级液压缸云梯进行建模和ANSYS分析。利用结构设计的有关内容,使用三维建模软件对云梯进行了建模并导入到ANSYS中,将云梯在救人和救火情况下所受力施加到模型上并进行ANSYS分析,得出液压多级缸云梯的应力分布和变形情况,并找出危险截面,为结构设计的改进提供一定的依据。ANSYS分析结果表明,102米液压多级缸云梯在理论和实践中完全可行。
[Abstract]:With the rapid development of the city, the buildings are more and more high, which brings convenience to the safety of people's lives and property.Once a fire occurs in a high-rise building, it will burn violently, spread through many ways, and be difficult to control the fire situation. It is easy to cause heavy casualties and property losses.At present, most of the fire brigade in our country is equipped with domestic fire engines, which is difficult to carry out effective work on high-rise building fire because of its low technical level.High-rise fire engines abroad are expensive and difficult to promote at home.In order to solve this problem, a new type of hydraulic multistage cylinder ladder is designed by using the characteristics of rapid, stable and accurate hydraulic cylinder.Around this technology, this paper has done the following research work:Firstly, the paper summarizes the problems existing in the fire safety in the process of urban development, introduces the development status of fire engines at home and abroad, describes the characteristics and development trend of the ladder fire engines, and expounds the significance of the research on the subject.Secondly, the paper describes the components of the fire truck, on the basis of referring to the main technology of the fire engine at home and abroad, using the existing chassis of the fire truck,The structural design of the upper part of the 102m hydraulic multistage cylinder ladder car is carried out. According to the design height and strength requirements, the distribution mode and connection form of the multistage hydraulic cylinder are designed, and the dimensions of the hydraulic cylinder and the connecting clamps are determined.Thirdly, the hydraulic system of multistage cylinder ladder is designed.According to the technical requirements of 102m hydraulic multistage cylinder ladder, the working pressure, flow rate and power of its hydraulic system are designed.According to the requirement of stable operation of hydraulic multistage cylinder ladder, a suitable synchronous hydraulic cylinder is selected.Because the three hydraulic cylinders of the hydraulic multistage cylinder ladder require its synchronism, on the basis of comparing the advantages and disadvantages of several common synchronous circuits, the synchronous circuit suitable for the ladder is selected.Then, according to the wind load theory, the wind force of hydraulic multistage cylinder ladder is calculated.In view of the fact that the ladder is greatly influenced by high-altitude wind, the response of the hydraulic multi-cylinder ladder under the wind force is analyzed with reference to the existing literature, and the wind resistance calculation manual is used.The stability of hydraulic multistage cylinder ladder under wind force is calculated.Finally, according to the content of structure design, the modeling and ANSYS analysis of 102 m multi-stage hydraulic cylinder ladder are carried out.Using the relevant contents of structural design, the ladder is modeled and imported into ANSYS by using three-dimensional modeling software, and the force of ladder is applied to the model under the circumstance of saving lives and fighting fire, and the ANSYS analysis is carried out.The stress distribution and deformation of the hydraulic multistage cylinder ladder are obtained, and the dangerous section is found. The analysis results of ANSYS show that the 102-meter hydraulic multistage cylinder ladder is feasible in theory and practice.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.51

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