目前，用户在输送机托辊的选型上普遍存在问题：当前市场上可供选择的托辊的种类繁多，性能差异很大，从寿命上看有的托辊运转几天甚就报废，而有的可正常运转十几年，当然其价格差别也比较大，这给用户的选择带来困难；如何选择合适的托辊降低输送机价格呢？

At present, user support problems and the selection of the current conveyor: many kinds of roller options on the market, the performance difference is very big, see some roller operation a few days what is discarded from life, and some of the normal operation of more than ten years, of course, the price difference is relatively large, it is difficult to the user's choice; how to choose the appropriate roller conveyor to reduce the price?

首先托辊的加工工艺对托辊的性能颇为重要，托辊的加工精度主要指外壳及托辊两端内孔的同心度以及各零件轴向尺寸的加工精度。若同心度太差，会造成滚动轴承咬死、增加阻力，降低使用寿命；若零件的轴向尺寸误差太大，会形成较大的轴向间隙，导致轴向窜动，破坏润滑和密封；若安装质量不好，将发生跑偏、咬卡、加剧磨损等，大大降低托辊使用寿命。

First of all, the processing technology of the roller is very important to the performance of the roller. The processing precision of the roller mainly refers to the concentricity of the inner hole at both ends of the shell and the roller, and the machining accuracy of the axial dimension of each part. If the concentricity is too poor, will cause the bearing seizure, increase resistance, reduce the service life; if the axial part size error is too large, will form a large axial gap, resulting in axial damage, lubrication and sealing; if the installation quality is not good, the deviation and bite card, increased wear, greatly reduced roller life.

托辊制造工艺也会影响托辊动载荷，产生动载的基本原因是托辊外壳壁厚不等和外壳径向跳动引起的质量不平衡。

The roller manufacturing process will also affect the dynamic load of the roller, the basic reason for the dynamic load is the uneven quality of the shell of the roller shell and the radial runout of the shell.