The effect of V-shaped cross section of V-ribbed belts on efficiency

The V-shaped cross section of V-Ribbed belts is essential to achieving their high efficiency. Unlike flat or round belts, the V-shaped cross section allows the pulley belt to penetrate deeper into the pulley groove, creating greater friction. This friction reduces slippage and increases power transmission efficiency. 
How the V-shaped cross section works
When V-Ribbed belts are installed in the pulley groove, the V-shaped cross section of the pulley belt contacts the V-shaped sides of the pulley groove. This contact creates a positive pressure that wedges the pulley belt into the groove. The greater the positive pressure, the greater the friction. Friction is the key factor in preventing the pulley belt from slipping in the pulley groove. Slippage causes power loss and wear on the pulley belt. The V-shaped cross section minimizes slippage by increasing friction, thereby increasing efficiency. 
Advantages of V-shaped cross section
The V-shaped cross section provides the following advantages over flat or round belts, which improve efficiency:
Larger contact area: The V-shaped cross section provides a larger contact area between the pulley belt and the pulley groove. This increases friction and reduces slippage. Positive Locking: The V-shaped cross section wedges the pulley belt into the pulley groove, providing positive locking. This prevents the pulley belt from slipping in the groove, further improving efficiency. Resistance to Bending Stress: The V-shaped cross section provides inherent strength against bending stress. This is critical for pulley belts that are subject to bending loads in the pulley groove. 
Impact in Specific Applications
The impact of the V-shaped cross section on the efficiency of V-Ribbed belts is demonstrated in the following specific applications:
Automotive Engines: V-Ribbed belts are used to drive various accessories in automotive engines, such as generators, water pumps, and air conditioning compressors. The V-shaped cross section helps improve efficiency, thereby reducing fuel consumption and improving overall engine performance. Industrial Machines: V-Ribbed belts are widely used in industrial machines, such as conveyor systems, pumps, and fans. The V-shaped cross section helps improve production efficiency by reducing slippage and improving power transmission efficiency. Agricultural Equipment: V-Ribbed belts are common in agricultural equipment, used to drive harvesters, tractors, and other machines. The V-shaped cross section provides the required friction to effectively transmit power in harsh environmental conditions.