销轨弯曲角对采煤机行走机构动力学特性的影响

Effect of bending angle of conveyor on dynamics of shearer running gear

为研究行走轮经过销轨连接处时的动力学特性,分析输送机在水平弯曲和垂直弯曲两种工况下销齿啮合中的三种激励,建立了销齿啮合力和导向滑靴与销轨间最小间隙的数学模型。利用ADAMS建立行走机构动力学仿真模型,模拟销轨间不存在弯曲角、存在水平弯曲角和存在垂直弯曲角三种状态的动力学特性。结果表明:销轨间不存在弯曲角时,行走轮角速度波动率为10.5%。随着弯曲角度的增大,行走轮角速度波动幅值由77(°)/s增大到83(°)/s,销齿啮合力幅值由504 kN增大至632 kN;而垂直弯曲角对行走轮速度波动不大,对销齿啮合力影响可忽略不计。该研究为行走轮与销齿的可靠性设计提供参考依据。

This paper is concerned with an insight into the dynamic behaviour of a walking wheel going through the connection of pin rails. The research consists of analyzing three kinds of incentives of pin teeth meshing in both the horizontal bending and the vertical bending of the conveyor and developing the two mathematical models, one for pin tooth meshing force and the other for the minimum gap between the guide shoes and pin rail. The study goes further into the development of the dynamic model of walking mechanism using the software ADAMS and the subsequent simulation of the dynamic dynamic characteristics of the fol- lowing three statuses between pin rails： the absence of bending angle, the presence of horizontal bending angle and vertical bending angle. The result indicates that the absence of bending angle between pin rails means the angular velocity fluctuations of walking wheel of 10.5% ; the increasing bending angle affords an increase from 77 （°）/s to 83 （°）/s in the angular velocity fluctuations amplitude of walking wheel and an increase from 504 kN to 632 kN in pin meshing force amplitude ; the vertical bending angle has little impact on walking wheel velocity fluctuation, meaning that its impact on pin tooth meshing force is negligible. The study provides a reference for the reliability design of walking wheel and pin teeth.