The Tensioner.

The tensioner is a belt-driven tensioning device. When the center distance of the belt cannot be adjusted, the tensioner can be used to tension the belt. The tension wheel is a follower wheel pressed on the belt to change the wrap angle of the belt wheel or to control the tension of the belt. It is a belt drive tensioning device.

The pulley is driven by friction, and the belt must be tensioned during installation. But after working for a period of time, it is stretched and loosened, and it is easy to slip and must be re-tensioned. If the center distance of the two transmission wheels cannot be adjusted, a tensioning wheel must be used to ensure normal transmission without slipping. The tension pulley uses spring or oil pressure to generate a force to tighten the belt, so that the belt can be pressed on the working pulley with proper pressure.