Engineering a notched belt can be a balancing act between flexibility, tensile cord support, and stress distribution. Precisely formed and spaced notches help to evenly distribute stress forces as the belt bends, thereby helping to prevent undercord cracking and extending belt existence.
Like their synchronous belt cousins, V-belts have undergone tremendous technological development since their invention by John Gates in 1917. New synthetic v belt china rubber substances, cover materials, construction strategies, tensile cord advancements, and cross-section profiles have led to an often confusing selection of V-belts that are extremely application particular and deliver vastly different degrees of performance.
Unlike smooth belts, which rely solely on friction and may track and slide off pulleys, V-belts possess sidewalls that match corresponding sheave grooves, providing additional surface area and greater stability. As belts operate, belt stress applies a wedging force perpendicular to their tops, pushing their sidewalls against the sides of the sheave grooves, which multiplies frictional forces that permit the drive to transmit higher loads. What sort of V-belt fits into the groove of the sheave while working under tension impacts its performance.
V-belts are made from rubber or synthetic rubber stocks, so they possess the flexibility to bend around the sheaves in drive systems. Fabric materials of various types may cover the stock material to provide a layer of security and reinforcement.
V-belts are manufactured in a variety of industry standard cross-sections, or profiles
The classical V-belt profile goes back to industry standards developed in the 1930s. Belts manufactured with this profile can be found in many sizes (A, B, C, D, E) and lengths, and so are widely used to displace V-belts in old, existing applications.
They are accustomed to replace belts on industrial machinery manufactured in other areas of the world.
All of the V-belt types noted over are typically available from producers in “notched” or “cogged” versions. Notches reduce bending tension, permitting the belt to wrap easier around little diameter pulleys and enabling better heat dissipation. Excessive warmth is a significant contributor to premature belt failing.
Wrapped belts have a higher resistance to oils and severe temps. They can be utilized as friction clutches during start up.
Raw edge type v-belts are better, generate less heat, enable smaller pulley diameters, increase power ratings, and provide longer life.
V-belts appear to be relatively benign and simple devices. Just measure the best width and circumference, discover another belt with the same measurements, and slap it on the drive. There’s only 1 problem: that strategy is approximately as wrong as you can get.