Tangential belt drive


In the tangential belt drive a belt coming from the suspended drive motor passes along the back of all the spindles. A large number of pressure rollers ensure that the belt is pressed uniformly against all the spindles. A fundamental distinction is made between three basic forms: single-belt, double-belt and group drive.

In the first case, an endless belt drives the spindles on both sides (Fig. 22, b), in the other system there are two belts, one of which drives the spindles on one side, and the second those on the other side (Fig. 22, a). The double-belt system results in more uniform spindle speeds. With the single-belt system, differences can arise due to the widely differing tension in the belts, especially on long machines. Group drive is being used increasingly nowadays instead of the single or double-belt version (Fig. 23). In this system a tangential belt drives 50 spindles on each side of the machine, for example, i.e. 10 group drives with 10 motors operating synchronously are needed for a machine with 1 000 spindles. Speed synchronization must be guaranteed. In another group drive system only 1 tangential belt is used. However, this belt is then driven by several motors operating synchronously along the length of the machine.

Fig. 22 – Tangential belt drive

Fig. 23 – Group drive (new from SKF Almanac)