普通胶带输送机作定坡转弯运行的理论分析

THEORETICAL ANALYSIS OF CONVENTIONAL BELT CONVEYOR RUNNING IN A CURVE AT CONSTANT GRADIENT

普通胶带输送机在采取一定的安装支撑角φ、内曲线抬高角γ和一定的成槽角φ_0后,经计算确定曲率半径即可作定坡转弯运行。曲率半径选用以下三种计算中的最大值:1.按稳定运行时力的平衡条件计算瞬时曲率半径;2.按胶带在曲线段的最大应力不超过容许值计算曲率半径;3.按外侧胶带不离开托辊计算曲率半径。

The curvature radius of a conventional belt conveyor is determined by calculations after the support angle φ, pitch angle of inside curve γ, and the troughing angle φ_0 are chosen. We take the maximum value from those obtained in the following calculations as the curvature radius. 1. Calculation of instantaneous curvature radius based on equilibrium conditions when conveyor is running smoothly; 2. Calculation of curvature radius when the maximum stress at the curve section of belt is not greater than the permissible value; 3. Calculation of curvature radius when the outside belt is not away from the rollers.