The operating principle of a high-pressure centrifugal fan is based on Newton's third law, which is the principle of action and reaction. Ventilators use a rotating impeller, usually made up of multiple blades, to accelerate the gas. When a gas, such as air, passes through the impeller, the impeller exerts centrifugal force on the gas, causing it to accelerate.
This process increases the kinetic energy and pressure of the gas, and the following will take you to learn more about how the high-pressure centrifugal fan works
1.Start-up: The electric motor starts and drives the impeller to rotate by a transmission device such as a direct connection or belt drive.
2.Inlet: The air is drawn from the air inlet of the ventilator and may pass through a guide to ensure a smooth flow of air into the impeller before entering the impeller.
3.Power Conversion: As the gas flows through the impeller, the bending design on the blades forces the gas outward and moves in a spiral path. At this point, the gas increases in velocity due to the centrifugal force exerted by the particles on the blades and gains additional energy and pressure as it moves to the edge of the impeller.
4.Pressurized exhaust: By the time the gas reaches the outer edge of the impeller, it has acquired relatively high velocity and pressure. It then enters a diffuser or volute – a gradually expanding channel that slows down the gas and converts more kinetic energy into static pressure energy.
5.Exhaust: Eventually, the gas leaves the ventilator in a pressurized state and is transported to the desired location through the air outlet.
To put it simply, a high-pressure centrifugal fan converts mechanical work into flow energy and pressure energy within the gas through the rapid rotation of the impeller, thereby efficiently moving and increasing the pressure of the gas. This type of ventilator is typically used where a high-pressure head and a small flow rate are required, such as in specific industrial applications, gas circulation systems, and certain cleaning equipment.