V-belts B-1700

Belts V-belts are used in belt drives, and among all belts this type is the most popular. Unlike flat belts, they have a trapezoidal or wedge-shaped cross-section. As in other belt drives, torque is transmitted from the driving V-pulley to the belt and from it to the driven pulley by means of friction forces. But in a V-belt drive, the working surfaces are the side surfaces of the belt. In this case, the contact patch is significantly larger than in a flat belt. This means greater friction force and, consequently, greater transmitted torque. To increase the contact patch, it is not necessary to increase the pulley diameter. It is more reasonable, from the standpoint of the overall dimensions of the design, to choose a pulley of small diameter but with several belts. In this case, it is called a multi-groove pulley. Advantages of using V-belts: Simple design. A belt and two pulleys are simpler than a gear or chain drive, whose parts are structurally more complex and require greater manufacturing precision. Simplicity of design means low cost. Easy maintenance. The belt drive does not require special maintenance and lasts until the belt wears out. Quiet operation. The belt is made of rubber or similar materials that dampen any noise very well. In a chain drive, the noise level will always be higher. Ability to withstand excessive loads without drive failure. If the force on the pulley exceeds the design value, the V-belt or any other belt will simply slip. In a chain drive, overload will lead to chain breakage or shearing of the key; in a gear drive, to chipping of the teeth. Ability to transmit forces over considerable distances. If a chain drive is used instead, the chain has a significantly greater weight compared to a belt drive, which will require additional drive power.