Today we are going to discuss the common failure mode o […]
Today we are going to discuss the common failure mode of the Automotive V Belts. The slippage of the belt in the pulley causes the sides of the belt to become smooth and shiny, the smooth surface makes the belt friction coefficient lower and easier to slip, in the pulley with or grease will cause this Kind of situation.
All the belt in the small pulley after a period of time after the operation will produce cracks, the reason is that the bottom of the rubber continue to be squeezed and produce large stress to break the point, early relatively small irregular cracks usually indicate that the belt has changed Hard, probably due to high temperatures.
The loss of the belt is due to the crack deepened to the position of the tension line caused by the whole piece of the fall, the last piece of the whole piece split, can not pass the need to meet. The stratification of the belt may be due to engine oil spills. The oil will weaken the adhesion of the rubber compound, resulting in a decrease in the adhesion between the rubber, the rope and the canvas, and the last belt will slip or break down. When installing the new belt To remove the source of oil contaminants.
Large foreign bodies in the pulley may be cut into the drive belt and cause the rupture of the tension line. It may also be forced by the external force during the installation. The tension line is damaged and not noticed until the belt is finally broken and the belt is broken Is due to bear too much tension and sustained mutations caused by the load.
If a belt slip occurs, you can check the cause, probably because the number of bands is too small or the pulley diameter is too small, or the tension is too small. In view of these problems, it is possible to increase the number of bands, appropriately increase the diameter and the pulling force. If the automotive V belt hardening, may be due to slip caused by belt heat, or the ambient temperature is too high. You should change the tension, improve the cooling method or use the heat-resistant automotive V belt.