锚杆钻机滑架振动特性分析及设计优化

Research on Vibration Characteristics of Sliding Frame of the Bolter Drilling Rig

针对锚杆钻机关键部件滑架受井下复杂工况影响易出现振动而引起结构破坏等问题,基于锚杆钻机结构组成及原理分析了滑架的振动特性,并利用Workbench 14.5对动力学特性进行仿真分析,得出了滑架部件的模态特性,仿真结果表明:锚杆钻机滑架固有频率为36.505 Hz,结构的振动频率远远避开了巷道环境频率,锚杆钻机滑架处于煤矿井下振动频率80 Hz的环境中时不会引起共振。利用拓扑优化算法对滑架结构进行优化,优化后固有频率增大0.8%,结构最大变形量减小0.66%,应力分布更加均匀合理,保证了滑架结构的可靠性和设备稳定性,提高了煤矿井下锚杆钻机的作业效率,为后期锚杆钻机结构设计与优化提供理论参考。

Aiming at the problems such as structural damage caused by vibration of the key components of the rock bolt rig under the influence of complex working conditions,the vibration characteristics of the skid are analyzed based on the structural composition and principle of the rock bolt rig,and the dynamic characteristics are simulated and analyzed by using Workbench 14.5.The modal characteristics of the carriage components are obtained;the simulation results show that the natural frequency of the bolting rig carriage is 36.505 Hz,and the vibration frequency of the structure is far away from the environmental frequency of the roadway,it will not cause resonance when it is in the environment of underground vibration frequency of 80Hz.The topological optimization algorithm is used to optimize the sliding frame structure.After optimization,the natural frequency increases by 0.8%,the maximum deformation of the structure decreases by 0.66%,and the stress distribution is more uniform and reasonable,which ensures reliability of the sliding frame structure and stability of the equipment,and improves the operation efficiency of underground bolting rig in coal mine.It provides theoretical reference for the later structural design and optimization of the bolting rig.