Engineering a notched belt is definitely a balancing act among versatility, tensile cord support, and stress distribution. Precisely shaped and spaced notches help to evenly distribute tension forces as the belt bends, thereby helping to prevent undercord cracking and extending belt life.
Like their synchronous belt cousins, V-belts have undergone tremendous technological development since their invention by John Gates in 1917. New synthetic rubber substances, cover materials, construction strategies, tensile cord advancements, and cross-section profiles have resulted in an often confusing selection of V-belts that are extremely application particular and deliver vastly different degrees of performance.
Unlike flat belts, which rely solely on friction and may track and slide off pulleys, V-belts possess sidewalls that match V Belt corresponding sheave grooves, providing additional surface and greater stability. As belts operate, belt stress applies a wedging force perpendicular with their tops, pressing their sidewalls against the sides of the sheave grooves, which multiplies frictional forces that allow the drive to transmit higher loads. How a V-belt fits into the groove of the sheave while working under pressure impacts its performance.
V-belts are manufactured from rubber or synthetic rubber stocks, so they possess the versatility to bend around the sheaves in drive systems. Fabric materials of various types may cover the share material to supply a layer of safety and reinforcement.
V-belts are manufactured in various industry regular cross-sections, or profiles
The classical V-belt profile goes back to industry standards created in the 1930s. Belts manufactured with this profile can be found in a number of sizes (A, B, C, D, E) and lengths, and are widely used to displace V-belts in old, existing applications.
They are accustomed to replace belts on commercial machinery manufactured in other areas of the world.
All the V-belt types noted above are usually available from producers in “notched” or “cogged” versions. Notches reduce bending stress, enabling the belt to wrap more easily around small diameter pulleys and enabling better warmth dissipation. Excessive high temperature is a major contributor to premature belt failing.
Wrapped belts have a higher level of resistance to oils and extreme temps. They can be utilized as friction clutches during start up.
Raw edge type v-belts are more efficient, generate less heat, enable smaller pulley diameters, enhance power ratings, and offer longer life.
V-belts look like relatively benign and basic devices. Just measure the best width and circumference, find another belt with the same measurements, and slap it on the drive. There’s only 1 problem: that strategy is approximately as wrong as possible get.