水射流割缝防突设备缠绕系统动力学及有限元分析

发布时间：2018-03-28 11:59

本文选题：高压水射流　切入点：割缝防突　出处：《太原理工大学》2013年硕士论文

【摘要】：煤矿瓦斯治理关系安全生产大局,但在实践中存在诸多的困难。有的煤层本身透气性低,随着作业深度的增加,瓦斯抽放的难度变大、成本提高,直接对安全生产构成威胁。传统的防治瓦斯突出问题的方法有很多,如采取提前爆破、钻孔预抽、水力冲孔等,但都存在效率较低、影响掘进速度等诸多问题。理论和实践表明,采用高压水射流在钻孔内割缝的新方法可以有效提高煤层的透气性,这样研制割缝设备就具有很大的实践意义。本文的研究对象就是太原理工大学多年来不断研究改进的割缝钻机。该设备由液压系统驱动将焊接起来的无缝钢管缠绕在滚筒上,使设备具有较长的工作半径。同时在行走、换向一系列机构的辅助下完成井下作业的各个动作,实现割缝提高煤层透气性的设计目的。其中焊接钢管作为高压水射流的通道,工作时伸出至掘进工作面,工作完成后缠绕在滚筒上,受到交变应力的作用,存在疲劳损坏的危险。缠绕机构作为上述过程的动力源,承载了设备较大的载荷,其传动性能和齿轮系强度成为研究重点。本文的研究内容主要包括以下几个方面： (1)深入研究了井下瓦斯突出问题及现有的防突技术方案,探讨了高压水射流破煤以及防突机理,在此基础上阐述了水射流割缝防突的原理和方法。 (2)借助ANSYS软件结构分析模块的强大功能,研究缠绕在滚筒上的焊接无缝钢管工作弯曲时的静力以及工作过程中的弯曲疲劳,对焊接钢管的疲劳寿命进行预测。 (3)利用UG三维造型功能完成设备传动系统主要零件的模型和装配,再利用多体动力学仿真软件ADAMS建立设备传动部分的刚体动力学分析模型,以此得到传动部分的运动学仿真结果。 (4)在ANSYS环境下对传动系统的主要零部件如轴、齿轮等进行静力学和动力学分析,得到其应力和应变情况,振动振型和模态信息。
[Abstract]:Gas control in coal mines is related to the overall situation of safe production, but there are many difficulties in practice. Some coal seams have low permeability. With the increase of operation depth, gas drainage becomes more difficult and the cost increases. There are many traditional methods to prevent and cure gas outburst, such as early blasting, borehole pre-drainage, hydraulic punching and so on, but they all have low efficiency. The theory and practice show that the new method of high pressure water jet cutting in borehole can effectively improve the permeability of coal seam, so it is of great practical significance to develop the cutting equipment. The research object of this paper is the continuous research and improvement of the slit drilling rig in Taiyuan University of Technology for many years. The equipment is driven by hydraulic system and wound the welded seamless steel pipe on the drum, which makes the equipment have a long working radius. At the same time, it is walking. With the assistance of a series of commutative mechanisms, the various actions of underground operation are completed to achieve the design purpose of improving the permeability of coal seams by cutting joints. The welded steel pipe, as a passage of high pressure water jet, reaches out to the tunneling face when working. Winding on the drum after the completion of the work, under the action of alternating stress, there is a danger of fatigue damage. As the power source of the above process, the winding mechanism bears a large load on the equipment. Its transmission performance and gear system strength have become the focus of the research. The research contents of this paper mainly include the following aspects:. 1) the problem of underground gas outburst and the existing technical scheme of preventing outburst are studied in depth, and the mechanism of breaking coal and preventing outburst by high pressure water jet is discussed. On the basis of this, the principle and method of preventing outburst by cutting joint of water jet are expounded. With the help of the powerful function of the structure analysis module of ANSYS software, the static force and bending fatigue of welded seamless steel tube wound on the drum are studied, and the fatigue life of welded steel pipe is predicted. Using UG three-dimensional modeling function to complete the model and assembly of the main parts of the equipment transmission system, and then using the multi-body dynamics simulation software ADAMS to establish the rigid body dynamics analysis model of the transmission part of the equipment. The kinematics simulation results of the transmission part are obtained. The main parts of transmission system such as shafts and gears are analyzed by statics and dynamics under ANSYS environment, and the stress and strain, vibration mode and modal information are obtained.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD713

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