Generator idler - grooved
A tensioner is a belt tensioning device used in an automotive drivetrain.
structure
The tensioner is divided into accessory tensioner (generator belt tensioner, air conditioner belt tensioner, supercharger belt tensioner, etc.) and timing belt tensioner according to the location of occurrence.
The tensioner is mainly divided into mechanical automatic tensioner and hydraulic automatic tensioner according to the tensioning method.
Introduction
The tensioner is mainly composed of a fixed shell, a tensioning arm, a wheel body, a torsion spring, a rolling bearing and a spring bushing, etc., and can automatically adjust the tension according to the different degrees of tension of the belt, making the transmission system stable, safe and reliable.
The tensioner is a vulnerable part of automobiles and other spare parts. The belt is easy to wear after a long time. After the belt groove is ground and narrowed, it will appear elongated. The tensioner can be adjusted according to the wear of the belt through the hydraulic unit or the damping spring. The degree is automatically adjusted, and with the tensioner, the belt runs more smoothly, the noise is small, and it can prevent slipping.
The tensioner is a routine maintenance item, and generally needs to be replaced after 60,000 to 80,000 kilometers. Usually, if there is an abnormal howling sound at the front of the engine or the position of the tension mark on the tensioner is too far from the center, it means that the tension is insufficient. . When 60,000 to 80,000 kilometers (or when there is abnormal noise in the front-end accessory system), it is recommended to replace the belt, tensioning pulley, idler pulley, generator single pulley, etc. uniformly.
effect
The function of the tensioner is to adjust the tightness of the belt, reduce the vibration of the belt during operation and prevent the belt from slipping to a certain extent, so as to ensure the normal and stable operation of the transmission system. Generally, it is replaced together with the belt, idler and other cooperative accessories to avoid worries. .
Structural principle
In order to maintain proper belt tension, avoid belt slippage, and compensate for belt wear and elongation caused by aging, the tensioner pulley requires a certain torque during actual use. When a belt tensioner is running, the moving belt can induce vibrations in the tensioner, which can cause premature wear of the belt and tensioner. For this reason, a resistance mechanism is added to the tensioner. However, because there are many parameters affecting the torque and resistance of the tensioner, and the influence of each parameter is not the same, the relationship between the components of the tensioner and the torque and resistance is very complicated. The change of torque directly affects the change of resistance, and is the main factor affecting resistance. The main factor affecting torque is the parameter of torsion spring. Appropriately reducing the middle diameter of the torsion spring can increase the resistance value of the tensioner.
