托辊是皮带输送机的一个基本部件，在皮带机工作过程主要起支撑皮带机皮带上的物料，引导皮带、减少皮带的跑偏等作用；
Idler is a basic part of belt conveyor. It mainly supports the materials on the belt, guides the belt and reduces the deviation of the belt;
托辊的种类及作用
Types and functions of idlers
按照托辊的结构，托辊可以分为槽形托辊、过渡托辊、平行托辊、缓冲托辊、调心托辊等；
According to the structure of the idler, the idler can be divided into groove idler, transition idler, parallel idler, buffer idler, centering idler, etc;
槽形托辊一般用的较多的是倾角为35度的槽形托辊，槽形托辊一般用在皮带输送机的上侧承载皮带上的物料载荷，同时改变皮带的外形，可以方便物料在皮带上的堆积和输送；
Generally, the groove idler with an inclination angle of 35 degrees is often used. The groove roller is generally used on the upper side of the belt conveyor to carry the material load on the belt. At the same time, changing the shape of the belt can facilitate the accumulation and transportation of materials on the belt;