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本文阐述了选择胶带输送机最小过渡段长度的一些实用公式和中间过渡段托辊的几何形状。本文针对滚筒安装在胶带线上或滚筒抬高超过胶带时的过渡情况,调查研究了任何类型的三托辊几何形状,以便使胶带边缘和中间的应力相等。该理论基于这样的基本假定:过渡段内既有低张力区,又有高张力区;过渡段前的胶带平均应力与过渡段内的平均张力相等。最小过渡段长度是托辊几何形状、胶带弹性模数以及过渡段内胶带高低张力的函数。假定高低张力极限是胶带极限强度的函数以及认为弹性模数可以表示为胶带极限强度的函数,这样就可以简化已导出的公式和作出过渡段长度随胶带张力变化的曲线。
This article describes some practical formulas for selecting the minimum transition section length of the belt conveyor and the geometry of the idler roller in the intermediate transition section. In this paper, we investigated the three-roller geometry of any type to match the transition of the drum mounted on the tape line or the drum over the tape in order to equalize the stress at the edges and in the middle of the tape. The theory is based on the basic assumption that both the low-tension zone and the high-tension zone are present in the transitional section; the average stress in the tape before the transitional section is equal to the average tension in the transitional section. The minimum transition length is a function of roller geometry, modulus of elasticity of the tape, and the high and low tension of the tape in the transition. It is assumed that the high and low tension limits are a function of the ultimate strength of the tape and that the modulus of elasticity can be expressed as a function of the ultimate strength of the tape so that the derived formula can be simplified and the transition length varies with the tape tension.