短距重载刮板输送机链传动啮合特性分析

Characteristic analysis on chain drive meshing of short-distance heavy duty scraper conveyor

根据矿用短距重载刮板输送机的结构特点和其链传动特点,研究了刮板链和链轮在啮合过程中的相互受力状态。在考虑离心力、悬垂张力、滚动摩擦力、弹性变形和设计加工误差等可忽略因素不计的情况下,根据刮板链在围齿区间内各链节的力平衡条件,建立了链节张力和链节与链轮啮合力随链轮旋转角度变化的方程式。应用方程式对10齿9°、12°和15°不同压力角链轮和12°压力角8齿、10齿和13齿不同齿数链轮进行了对比分析计算,分析结果表明压力角越小、齿数越少,链轮单齿传递的有效圆周力越大,但链节与链轮的最大啮合力也越大,对刮板链和链轮的强度要求也越高。最后应用计算机模拟仿真对上述结果进行了仿真验证,验证结果与计算分析结果基本一致。

The paper investigates engagement contact forces of flight chain and chain wheel based on the characteristic of structure and drive of short-distance heavy duty scraper conveyor.The formulation of rotation angle,engagement force,and chain tensile force are established according to force equilibrium conditions of engaged chains of flight chain,which omits the influence of eccentricity,suspension tensile force,elastic distortion,design and manufacturing errors.Analysis results with above formulation are compared between 9°,12°,15° pressure angle of 10 teeth chain wheel and 8 teeth,10 teeth,13 teeth with 12° pressure angle,the conclusion indicates that wheels have less pressure angle and teeth will gain larger tangential force and engagement force of single teeth,while demand higher material strength of chains and wheels.At last,finite element simulation is carried out to verify the formulation results.