What primary function does a V-belt serve?

The primary function of a V-belt is power transmission. V-belts are designed to efficiently transfer rotational energy from one component to another, typically from a motor to a driven machine such as a fan, pump, or generator. They have a trapezoidal cross-section that allows them to fit snugly into pulleys, creating a friction grip that minimizes slippage and ensures effective energy transfer. This design helps in maintaining performance under varying loads and speeds, making V-belts a popular choice in various mechanical systems where reliable power transmission is necessary.

While cooling machinery, liquid storage, and filtering solids are important functions in certain industrial and mechanical contexts, they do not pertain to the core purpose of a V-belt. The focus is squarely on its role in transferring power between different parts of a machine.