某矿主井井塔振动测试及振动控制

发布时间：2018-07-24 16:42

【摘要】：井塔是整个矿井系统中的纽带和灵魂。井塔结构复杂,内部设备较多,不管是新建还是改造都将花费不少的人力、物力、财力。新建井塔由于在设计过程中未考虑到提升设备的振动频率接近梁板结构的固有频率,导致提升设备与梁板结构产生共振,危害结构和人身安全。该矿在提升设备提煤过程中,楼板振动强烈,不能正常运营,严重影响矿井的生产效率及经济效益。本文以内蒙古鄂尔多斯某矿主井井塔为研究对象,研究井塔楼板振动强烈的原因,寻找主要振源。具体做法为采用实测法和自由振动法,测量梁板结构和提升设备的振动信号,并对数据进行分析处理,依据振源与梁板结构相关性找出本井塔结构振动的主要振源:电机设备的振动与井塔结构的振动产生共振,根据现场实际情况采取对井塔结构部分梁板增大截面、部分梁底增加钢梁的加固措施,增大结构固有频率,避免提升系统振动与梁板结构振动产生共振,经有限元模拟加固后的井塔结构固有频率,加固后楼板的固有频率成功避开振源产生共振的频率段,即电机提升设备振动不会与楼板振动产生共振。
[Abstract]:The well tower is the link and soul in the whole mine system. The structure of the well tower is complex and the internal equipment is more. It will cost a lot of manpower, material and financial resources, whether it is new or reformed. The new well tower does not consider the vibration frequency of the lifting equipment near the natural frequency of the beam structure, which leads to the lifting equipment and the beam plate structure. In the process of lifting equipment, the vibration of the floor is strong and it can not operate normally, which seriously affects the production efficiency and economic benefit of the mine. This paper takes the main well tower of an Ordos mine in Inner Mongolia as the research object, and studies the reasons for the strong vibration of the tower slab and seeks the main source of vibration. The method is to measure the vibration signals of the beam plate structure and lifting equipment by using the measured method and free vibration method. The data are analyzed and processed. According to the correlation between the vibration source and the beam plate structure, the main vibration source of the structure of the well tower is found. The vibration of the motor equipment and the vibration of the well tower structure are produced by the vibration, and the well tower knot is taken according to the actual situation. A part of the beam plate increases the cross section and the part of the beam increases the strengthening measures of the steel beam, increasing the natural frequency of the structure, avoiding the resonance of the vibration of the hoisting system and the vibration of the beam plate structure. The natural frequency of the structure after reinforcement is simulated by the finite element method. The natural frequency of the reinforced floor is successfully avoided by the frequency section of the resonance source, that is, the motor hoisting. The vibration of the floor will not resonate with the vibration of the floor.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD54

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