塔机顶升机构液压系统可靠性设计

发布时间：2018-11-03 08:20

【摘要】：塔机是一种常见的起重机械,常用于造船、建筑等场合。塔机的使用可以大大提高工人的工作效率。为了应对现在建筑业对塔机性能要求的提高,塔机趋于大型化。塔机的大型化给建筑业带来了更大的便利,但同时塔机的安全性问题也更加凸显。而从以往的塔机事故数据来看,塔机顶升机构故障造成的事故最多,后果最严重。塔机的顶升机构是塔机的重要组成部分,它可以使塔机随建筑物一起升高,以实现建筑材料的垂直升降。顶升机构的液压系统是其动力源和控制源,液压系统的可靠性直接影响顶升机构甚至整机的可靠性、安全性。对顶升机构液压系统进行合理的可靠性优化设计,可以有效的提高塔机的安全性,避免事故发生。 本文以某型号塔机为例,通过对其顶升机构液压系统各部分作用及故障类型、原因、后果的研究分析,得到液压系统的故障树模型。对液压系统进行可靠性仿真,判断其可靠性是否满足设计要求。然后又对液压系统进行了基于可用度的预防维修策略的仿真,得出了基于可用度的预防维修策略,既提高塔机顶升系统的安全性,又能够保证其较高的可用度。最后采用简化设计、降额设计、冗余设计、集成设计、容错设计等几种可靠性设计方法对液压系统进行可靠性优化设计,通过对可靠性、可用度、维修策略的综合考虑,确定液压系统的可靠性优化方案,并验证液压系统的可靠性优化效果。 本文的研究内容与实际项目相结合,制定塔机顶升机构液压系统可靠性设计方案,该方案运用到实际项目中,通过合理的可靠性设计,提高塔机顶升机构液压系统的可靠性,确定可用度优先的预防维修策略,可以提高顶升机构的安全性。
[Abstract]:Tower crane is a common lifting machinery, often used in shipbuilding, construction and other occasions. The use of tower cranes can greatly improve the working efficiency of workers. In order to meet the requirements of the building industry for tower crane performance, tower crane tends to be large. The large-scale tower crane brings more convenience to the construction industry, but at the same time, the safety problem of tower crane is more prominent. According to the previous data of tower crane accidents, the accidents caused by failures of tower crane lifting mechanism are the most serious. The lifting mechanism of the tower crane is an important part of the tower crane. It can make the tower crane rise with the building to realize the vertical lifting of building materials. The hydraulic system of the lifting mechanism is its power source and control source. The reliability of the hydraulic system directly affects the reliability and safety of the lifting mechanism and even the whole machine. Reasonable reliability optimization design of hydraulic system of lifting mechanism can effectively improve the safety of tower crane and avoid accidents. Taking a certain type of tower crane as an example, the fault tree model of hydraulic system is obtained by studying and analyzing the function, fault types, causes and consequences of each part of hydraulic system of lifting mechanism. The reliability of hydraulic system is simulated to determine whether its reliability meets the design requirements. Then the preventive maintenance strategy based on availability of hydraulic system is simulated, and the preventive maintenance strategy based on availability is obtained, which not only improves the safety of tower crane lifting system, but also ensures its high availability. Finally, several reliability design methods, such as simplified design, reduction design, redundant design, integrated design, fault-tolerant design and so on, are used to optimize the reliability of hydraulic system. The reliability, availability and maintenance strategy are considered synthetically. The reliability optimization scheme of hydraulic system is determined and the reliability optimization effect of hydraulic system is verified. Combining the research content with the actual project, the reliability design scheme of hydraulic system of tower crane hoisting mechanism is worked out. The scheme is applied to the actual project, and through reasonable reliability design, the reliability of hydraulic system of tower crane hoisting mechanism is improved. The safety of the jacking mechanism can be improved by determining the preventive maintenance strategy of availability priority.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH213.3

【参考文献】

中国期刊全文数据库 前10条

1 何富其;;工程机械可靠性存在的问题及解决策略[J];装备制造技术;2012年05期

2 乔丽霞;潘明存;;工程机械液压系统故障的检查及其维护方法分析[J];装备制造技术;2013年05期

3 徐丙凤;黄志球;胡军;魏欧;肖芳雄;;一种状态事件故障树的定量分析方法[J];电子学报;2013年08期

4 耿技;聂鹏;秦志光;;软件可靠性模型现状与研究[J];电子科技大学学报;2013年04期

5 王智明;杨建国;王国强;张根保;;多台数控机床的时间截尾可靠性评估[J];哈尔滨工业大学学报;2011年03期

6 孙忠胜;赵继广;曹震;李小利;乔东来;;火炮供输弹系统故障模式和影响分析研究[J];机电产品开发与创新;2009年04期

7 ;A reliability assessment method based on support vector machines for CNC equipment[J];Science in China(Series E:Technological Sciences);2009年07期

8 吕刚,谷立臣;泵式混凝土湿喷机液压系统可靠性分析与计算[J];建筑机械;2003年11期

9 董玉革;陆海涛;郭彪;;基于最小割集理论的可靠性计算精度提高方法[J];机械工程学报;2013年20期

10 周红;高鹏;;建筑机械中塔机的运用和发展[J];河南科技;2013年05期

中国博士学位论文全文数据库 前1条

1 陈炳锟;数控机床可靠性试验设计及评估方法研究[D];吉林大学;2011年

，

本文编号：2307234