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行走轮与销轨的啮合属于非共轭传动,传统齿轮强度校核方法对行走轮不再适用,以往对行走轮强度的校核大多采用有限元静态力学仿真分析,而静态力学仿真分析不能准确反映行走轮轮齿的实际受力状态,计算结果略有偏差。为了能比较准确地校核采煤机176 mm节距复合齿形行走轮的强度,利用Solid Edge和ANSYS软件对176 mm节距复合齿形行走轮建立动态力学仿真模型,提取齿面接触应力与齿根弯曲应力随时间的变化的仿真计算数据,并绘制成曲线,通过对比仿真结果和行走轮材料的许用应力值,发现176 mm节距复合齿形行走轮可以满足采煤机1 500 k N牵引力的使用要求,与此同时总结了行走轮轮齿从进入啮合到脱开啮合过程中,接触应力和弯曲应力随时间的变化规律,得到了行走轮出现接触应力峰值和弯曲应力峰值时行走轮与销轨啮合的位置,为今后优化行走轮齿形提供了依据;通过对比理论计算结果与仿真结果,验证了仿真结果的正确性。
Conventional gear strength checking methods are no longer suitable for running wheels. In the past, the checking of walking wheel strength mostly adopts the finite element static mechanical analysis, but the static mechanical simulation analysis can not be accurate Reflect the actual stress state of walking gear tooth, the calculation result is slight deviation. In order to check the strength of 176 mm pitch composite toothed walking wheel more accurately, the dynamic mechanical simulation model of 176 mm pitch composite toothed walking wheel was established by using Solid Edge and ANSYS software, and the tooth surface contact stress and Tooth root bending stress with time changes of the simulation data and draw a curve, by comparing the simulation results and walking wheel material allowable stress values and found that 176 mm pitch composite toothed walking wheel can meet the shearer 1 500 k N traction requirements, and at the same time, summarized the variation of contact stress and bending stress with the time from entering meshing to disengaging meshing, and obtained walking contact peak and bending stress peak The position of the wheel and the pin rail meshing provides the basis for optimizing the gear shape of the walking wheel in the future. The correctness of the simulation results is verified by comparing the theoretical calculation results with the simulation results.