【作者】 李杰；

【导师】 李文英；

【作者基本信息】 太原理工大学 ， 机械电子工程， 2010， 硕士

【摘要】 近年来,为了抑制煤矿灾难事故,我国许多煤矿企业都在不断提高其安全生产能力,以适应煤炭工业的发展要求。而煤矿井下排水系统作为煤矿生产的四大系统之一,担负着排除煤炭生产过程中产生各种积水的重任,对维护煤矿系统正常生产起着重要的作用。因此,研究煤矿井下排水系统的运行可靠性对于提高煤炭企业的安全生产有着重要的意义。本文首先根据某矿井的原始资料,对排水设备进行了选型设计。其中,引入了可靠性数学模型,并采用了一种全新的选择设计方法,即根据经济可靠的原则选择排水设备。这种方法可以有效的应用于排水系统的选型设计和排水设备可靠性改造中。在离心式水泵排水系统中,调节阀门是必不可少的元件之一。它一方面担负着水泵站可靠运行,另一方面可以控制水泵流量,影响系统的工作特性。本课题对煤矿排水系统中使用的调节阀门进行了系统分析和研究,并将其优缺点和适用性进行了概括叙述,然后提出了一种以多功能水泵控制阀代替传统的调节阀门应用于煤矿井下排水系统的改造方法。文中首先分析多功能水泵控制阀的结构特点和工作原理。然后从工程流体力学方面对该阀门的水锤防护进行了分析研究,从理论上证明该阀门相比于普通的逆止阀,在排水系统中有着更好的水锤防护能力。最后结合煤矿井下排水系统的实际情况以及在阀门研究中常用到的计算流体动力学分析方法,利用计算流体动力学分析软件——FLUENT6.2,对多功能水泵控制阀的稳态、动态性能进行了仿真研究。其中在对多功能水泵控制阀动态性能的数值模拟研究中使用到了动网格技术。随着自动控制技术的发展,将工业控制技术与通信技术应用于煤炭工业领域已成为一种必然趋势。我们根据文中所选用的排水设备,研制出其相应的自动控制系统。该控制系统采用西门子公司推出的S7-300系列PLC作为现场中心控制单元和安装有北京三维力控科技有限公司开发的组态软件(Force Control 6.0)的PC上位机作为远程监控中心。设计了基于PROFIBUS-DP协议和TCP/IP协议的总线监控网络,实现了对排水系统实时、准确的现场控制与远程监控。最后为了提高排水系统的运行可靠性,本文还对抑制控制系统各种干扰因素进行了研究。更多还原

【Abstract】 In recent years, in order to control the mine’s disaster happened frequently,there are some effective approaches should be taken to improve the capacity of coal mining enterprises’s safety to adapt the development of coal industry requirement. As one of the four component parts in coal mine system,the coal mine drainage system play an important role in normal production and has responsible for excluding the water which arise in the course of coal production. Therefore,studying the operational reliability is one of the great significant things about the coal mine safety production.Above all,according to some coal mine’s raw data, a new approach that reference the mathematical model of reliability can be adopted. Base on the principle of economy and reliability when selecting and designing the drainage device can improve its operational reliability.Regulating valves are essential components in the centrifugal pump drainage system. It responsible for the pump station reliable operation, on the other hand could control the pump flow, and affect the system’s operating characteristics. This study focus on the performance of regulating valve, and summarized the merits and drawbacks,and then this study propose that using the multi-function control valve for pumping system to replace the traditional regulating valves in coal mine drainage system. First of all, the structure and working principle of multi-function control valve for pumping system will be studied. and then,research the water hammer protection on the aspect of engineering fluid mechanics,theoretical proved that this valve have better water hammer protection capability than the ordinary check valve. At last, with the actual situation in coal mine drainage systems and Fluid Dynamics Analysis(CFD),this study simulate the valve’s steady-state performance and dynamic performance simulation through using fluid dynamics simulation software--FLUENT6.2.The technology of dynamic mesh will be used in study dynamic performance.With the continuous development of automation technology in our country, appling the industrial control technology and communication technology to the coal industry have become an inevitable trend. Based on the choice of drainage facilities,we have developed the corresponding automatic control system in which the Siemens S7-300 series PLC as an on-site central control unit and the PC host computer with configuration software (Force Control 6.0) as an remote monitoring center,we also have designed the bus monitoring network which base on PROFIBUS-DP and TCP / IP protocol, achieved the drainage system real-time、accurate on-site control and remote monitoring.To increase the operation reliability of coal mines drainage system, the various interfering factors in the automatic control system been studied更多还原