基于LS-DYNA的采煤机行走轮与销排的接触动力学分析
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摘要
由于煤矿井下地质环境复杂,给采煤机的截割机构造成无规则的冲击载荷作用,影响采煤机的正常运行。因此,利用LS-DYNA仿真分析软件建立了采煤机行走轮和销排接触时的动力学模型,对其实际工作时的接触动力学情况进行了仿真分析。结果表明行走轮的轮齿进入啮合和脱开啮合时会产生明显的应力突变,且在一个齿轮啮合时节线冲击比较明显,可以通过降低销排的节距,使行走轮和销排啮合时的重合度增加,能有效降低啮合时的接触应力,提升采煤机行走机构工作时的使用寿命。
Due to the complicated geological environment in the coal mine, the cutting mechanism of the shearer causes irregular impact load, which affects the normal operation of the shearer. Therefore, the dynamic model of the contact between the shearer wheel and the pin row is established by using LS-DYNA simulation analysis software, and the contact dynamics of the shearer in actual work is simulated and analyzed. The results show that the gear teeth of the walking wheel will produce obvious stress sudden change when they enter the meshing and detach meshing, and the impact of the pitch line will be obvious when a gear is engaged, and the pitch of the pin row can be reduced by reducing the pitch of the pin row. The coincidence degree between the wheel and the pin row is increased, which can effectively reduce the meshing performance of the wheel and the pin row. Contact stress, improve the working life of shearer walking mechanism.
Due to the complicated geological environment in the coal mine, the cutting mechanism of the shearer causes irregular impact load, which affects the normal operation of the shearer. Therefore, the dynamic model of the contact between the shearer wheel and the pin row is established by using LS-DYNA simulation analysis software, and the contact dynamics of the shearer in actual work is simulated and analyzed. The results show that the gear teeth of the walking wheel will produce obvious stress sudden change when they enter the meshing and detach meshing, and the impact of the pitch line will be obvious when a gear is engaged, and the pitch of the pin row can be reduced by reducing the pitch of the pin row. The coincidence degree between the wheel and the pin row is increased, which can effectively reduce the meshing performance of the wheel and the pin row. Contact stress, improve the working life of shearer walking mechanism.
引文
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