【作者】 张延军；

【导师】 寇子明；

【作者基本信息】 太原理工大学 ， 机械设计及理论， 2008， 硕士

【摘要】 煤炭行业是我国的支柱产业。随着高新技术和现代化生产的发展,煤矿的产量也在一年一年的上升,煤矿辅助运输对于煤矿的发展也就显得更为重要,成为制约一个煤矿发展的重要因素。随着新的科学技术在煤矿工业的应用,安全、高产、高效现代化矿井的建设,辅助运输的现代化程度成为衡量一个煤矿现代水平的重要指标,同时辅助运输的效率直接影响着矿井生产效率。因此发展高效快捷的辅助运输方式是我国煤矿工业建设的一项重要任务。作为高产高效辅助运输之一的单轨吊辅助运输系统越来越显示出它的优势,它不受底板条件的影响,运输巷道布置方便节省空间,运输效率高。过去一个月才能完成的综采面搬家倒面工作,利用单轨吊可以在一周内完成,大大提高了辅助运输的效率,从而提高全员效率。这可以在目前使用的单轨吊煤矿得到证明。本文在对常村矿进口单轨吊现场考察和查阅有关资料的基础上,分析了现在所使用单轨吊燃油动力系统存在的问题。对单轨吊燃油动力系统选配大功率4112型防爆柴油机,并针对所选配的柴油机设计了加载试验台,对柴油机的相关特性及相应参数测量,试验证明所选用的防爆柴油机能够满足目前煤矿大型液压支架、掘进机和采煤机的连续长距离大坡度的运输要求。为了保证防爆柴油机能够满足煤矿井下恶劣环境的要求和满足煤矿井下的防爆要求,防止排气温度过高,对单轨吊所配柴油机尾气冷却系统设计计算,对防爆柴油机排气歧管建模分析,设计并计算单轨吊尾气净化箱冷却性能。为了保证单轨吊动力系统的安全使用,开发设计单轨吊多点安全保护装置,对所用传感器进行选型分析,设计多点保护装置电控系统并对相应控制元件选型。在对进口单轨吊液压系统分析的基础上,针对目前液压系统存在的问题,结合改造后的大功率燃油系统,从原理上阐明单轨吊的液压系统及其控制回路、制动回路、安全保护回路,对液压系统关键阀——卸荷溢流阀工作原理,建立物理模型,运用功率键合图法建立卸荷溢流阀的数学模型,并转为状态方程,通过数字电路对其动态特性分析,得出了卸荷溢阀的静态工作区间和动态响应曲线,这为防止大功率燃油系统单轨吊液压系统发热,使液压系统能够长时间有效运行提供了理论依据,为进一步优化液压系统提供了新的方向和思路。另外,对单轨吊整机液压系统建立动态模型,运用现代控制理论,分析单轨吊液压系统的各种特性,从理论上确定单轨吊的最优参数,分析驱动系统和制动系统响应的协调特性。更多还原

【Abstract】 Coal industry is our chief industry. With the development of high and new technology and modernized product, mine yield is increased year by year, so auxiliary haulage is becoming more and more important for coal mine development, and it is becoming an important factor to confine coal development. With the application of new science and technology on the coal industry, it becomes an important index for mine modernization construction, which is the update mine construction of safe, high-production, high efficiency and update construction of auxiliary haulage. At the same time, the efficiency of auxiliary haulage directly affects the mine production efficiency. So it becomes an important task to develop highly active auxiliary haulage for our coal industry.As one of the auxiliary haulage modes, monorail crane auxiliary haulage system has exhibited its advantage, which is not confined with floor condition, convenience of transport tunnel layout and high transport efficiency. With monorail crane we can finish complex coal-cutting work of working face in a week which would be a month in the past. So it can increase auxiliary haulage efficiency and also worker efficiency. All of these can be certificated by the mines whose has used monorail crane.Based on the survey and collection of related data of import monorail crane in Changcun Mine, the problems of fuel system which are used now are analyzed. Superpower explosive-proof 4112 diesel for monorail crane fuel power system is used and loading tester is designed. Experiment results certificate that this explosion-proof diesel can meet the needs of continuously, long-distance and large gradient transport of hydraulic support, development machine and coal mining machine. To meet the need of bad environment and unexploited demands in mine and lower temperature of exhaustion, design and calculation of diesel cooling system and exhaust gas cleaner are done, and exhaust manifold is analyzed. Multiple-point safety device is developed to make the use of fuel power system safe. Electric control system is designed, and various elements are selected and analysis.The principle of Monorail crane hydraulic system and control loop system, braking loop system and safety loop system are illuminated according to the problems and fuel system which has been improved. The physical model and mathematic model of unloading relief valve, which is the key valve of hydraulic system, is building, and power characteristic study is done. Static working interval and power response curve of unloading relief valve can be acquired by power simulation. It can avoid generating heat and bring theory basis of anglicizing the run of hydraulic system in long time, also can supply new methods for motorizing hydraulic system. In addition, the power model of hydraulic system is building and modern control theory is used to acquire the best parameters in theory of monorail crane and coordination characteristic of driving and braking system, according to the analysis of hydraulic system characteristics.更多还原