托辊是带式输送机的重要部件，种类多，数量大。它占了一台带式输送机总成本的35%，产生了70%以上的阻力，因此托辊的质量尤为重要。

The roller is an important part of belt conveyor. It accounts for 35% of the total cost of a belt conveyor, generating more than 70% resistance, so the quality of the roll is especially important.

托辊的作用是支撑输送带和物料重量。托辊运转必须灵活可靠。减少输送带同托辊的摩擦力，对占输送机总成本25%以上的输送带的寿命起着关键作用。虽然托辊在带式输送机中是一个较小部件，结构并不复杂，但制造出高质量的托辊并非易事。

The roller is supported by supporting conveyor belt and material weight. The roller must be flexible and reliable. Reducing the friction of the conveyor belt and the roller, plays a key role in the life of the conveyor belt, which accounts for more than 25% of the total cost of the conveyor belt. Although the roller is a small part in the belt conveyor, the structure is not complex, but it is not easy to make a high quality roll.

判断托辊好坏的标准有以下几条：托辊径向跳动量；托辊灵活度；轴向窜动量。

There are several criteria for judging the quality of a roll. Flexibility of the roller. Axial momentum.

托辊的基本类型

The basic type of the roller

托辊是带式输送机的重要部件，种类多，数量大。作用是支承皮带，减少皮带运行阻力，并使皮带的垂直度不超过一定限度以保证皮带平稳地运行。

The roller is an important part of belt conveyor. The function is the supporting belt, reduces the resistance of the belt, and makes the belt more vertical than certain to keep the belt running smoothly.

托辊按其用途分类为调心托辊、缓冲托辊、槽型托辊、平行托辊。调心托辊的作用是纠正带式输送机的跑偏，通常输送机的重载段上安装回转式槽型调心托辊，空载段上安装平行调心托辊。缓冲托辊是根据实际情况应用于机尾架上的，受料时，可以降低物料对皮带的冲击，有利于沿长皮带的使用寿命。槽形托辊一般由两个侧托辊和一个平托辊组成，槽角度一般为30度，对于可拆卸式的带式输送机，槽形托辊的三个托辊互相铰接在一起，故称铰接托辊。平行托辊一般为一个长辊，它安装在承受压力的下端故称下托辊。

The roller is classified as the adjustment roll, cushioning roller, groove roller and parallel roller. Self-aligning roller is to correct the action of running deviation of belt conveyor, conveyor often overloaded section is installed on the self-aligning roller rotary groove, the light is installed on parallel self-aligning roller. The cushioning roller is based on the actual situation, which can reduce the impact of the material on the belt, which is beneficial to the service life of the long belt. Grooved roller generally consists of two side of roller and a pinto roller, groove Angle is 30 degrees commonly, for removable type belt conveyor, three roller trough idlers hinged together each other, therefore calls articulated roller. The parallel roller is usually a long roll, which is mounted on the lower end of the pressure.