Gears that use toothed belts are a popular method of transmission. This is because, apart from the ability to handle high torques and high speeds, they allow for precise synchronization of individual components of the device, e.g. camshaft handling in an internal combustion engine. This is important for many mechanical components, but also useful, for example, in controlling more complex work sequences. However, no gear of this type can function smoothly without a suitable one the toothed pulley with high durability. Let's look at how the pulley works and what mechanisms can lead to its premature wear.
How do gears with toothed pulleys work?
The use of toothed belts for drive various mechanisms it is very common. They are used both in internal combustion engines, e.g. for precise valve control and operation of accessories, but also in many industrial machines, especially where it is necessary cooperation of many moving parts. The principle of operation of the gear with toothed belts is relatively simple. The driven pulley works, transmitting torque to the belt and changing the rotary motion to a linear motion, which is then converted again to rotary motion of the driven wheel. The interaction between pulley and belt is possible with form coupling and the pressure exerted by pulley toothing on belt toothing, and in the case of a driven pulley on toothed wheel. An additional factor influencing the functioning of the system is also frictional coupling appearing between the teeth.
How do toothed pulleys wear?
The primary cause of premature wear is friction occurring between the toothing of the belt and the pulley. It causes gradual wear of the material from which the wheel was made, and depending on the geometry of the dentition, this mainly applies to either the bottom of the gullets or its vertices. Excessive loads on the gears and also contribute to the aggravation of the effects of wear alignment disorderswhich lead to accelerated abrasion of the material on the edges of the dentition, and sometimes also in its middle part.