1 basic data

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。

Roller is an important component of belt conveyor, which has many kinds and large quantities. It accounts for 35% of the total cost of a belt conveyor, resulting in more than 70% of the resistance, so the quality of idlers is particularly 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 roll is used to support the conveyor belt and the weight of the material. Idler operation must be flexible and reliable. Reducing the friction between the conveyor belt and the supporting 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. Although the roller is a small component in the belt conveyor, the structure is not complicated, but it is not easy to manufacture a high quality roller.

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 idlers: radial runout of roller, roller flexibility and axial thrust.

托辊的基本类型

Basic types of idlers

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。

Roller is an important component of belt conveyor, which has many kinds and large quantities. The function is to support the belt, reduce the running resistance of the belt, and make the verticality of the belt no more than a certain limit to ensure the smooth running of the belt.

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 idlers are classified as self-aligning rollers, cushion rollers, trough idlers and parallel idlers according to their uses. The function of self-aligning roller is to correct the deviation of belt conveyor. Usually, the rotary groove type self-aligning roller is installed on the heavy section of the conveyor, and the parallel self-aligning roller is installed on the unloaded section. The buffer roller is applied to the tail frame according to the actual situation. When the material is received, the impact of the material on the belt can be reduced, and the service life of the belt along the long belt can be reduced. Trough roller generally consists of two side rollers and a pinto roller, groove angle is 30 degrees, the belt conveyor is detachable, grooved roller of three roller hinged together, so called articulated roller. The parallel roller is usually a long roller, it is installed under the lower end of the pressure, so it is called the lower roller.