Brushless EC centrifugal blower manufacturer will show you the working principle of centrifugal fans
The manufacturer of brushless EC centrifugal fans tells you that when the impeller rotates, the gas between the blades of the centrifugal fan is subjected to centrifugal force to obtain kinetic energy discharged from the periphery of the impeller and the volute guides the flow to the outlet. The center of the fan causes the center of the impeller to be located at the center of the impeller. A negative pressure is formed, allowing the external airflow source to continuously flow in and replenish, allowing the fan to exhaust air.
The manufacturer of the brushless EC centrifugal blower tells you that the electric motor transmits power to the fan impeller through the shaft. The rotation of the impeller transfers energy to the air. Under the action of rotation, air generates centrifugal force. Blade diffusion from the fan impeller into the surrounding environment. At this point, the larger the fan impeller, the greater the energy received by the air. The larger the head (wind pressure) of the fan. If the large impeller is cut to a small size, it will not affect the air volume, but only reduce the air pressure.
The manufacturer of brushless EC centrifugal fans tells you that centrifugal fans mainly consist of impellers and casings. The impeller of a small fan is directly installed on the motor, while a large fan is connected to the motor through a coupling or pulley. Centrifugal fans generally use a single stage impeller with a single side air inlet; A large flow rate can be a double-sided intake with two back-to-back impellers, also known as a double suction centrifugal fan.
The manufacturer of brushless EC centrifugal fans tells you that the impeller is the main part of the fan. Its geometric shape, dimensional accuracy, and number of manufactured blades have a significant impact on its performance. Conduct static or dynamic balance tests on the impeller to ensure smooth rotation of the fan. According to the direction of the blade outlet, impellers are divided into three types: forward, radial, and backward. The manufacturer of the brushless EC centrifugal fan tells you that the top of the blades of the front impeller is tilted towards the direction of rotation of the impeller; The top of the blades of the radial impeller is radial, divided into straight blades and curved blades; The top of the rear impeller blade tilts in the opposite direction to the impeller.
The front impeller generates maximum pressure. The manufacturer of brushless EC centrifugal fans tells you that when the flow rate and speed are constant, the required impeller diameter is the smallest, but the efficiency is usually low. The backward impeller is the opposite, with the minimum pressure generated, the required impeller diameter being the largest, and usually the higher the efficiency. The radial impeller is between the two. The contour of the blade is the simplest straight blade, while the wing blade is the most complex blade. The manufacturer of the brushless EC centrifugal blower tells you that in order to have an appropriate speed distribution on the blade surface, curved blades are usually used, such as arcs of the same thickness. Impellers usually have a cover plate to increase the strength of the impeller and reduce gas leakage between the blades and the casing. The connection between the blades and the cover is welded or riveted. The welded impeller has a light weight and smooth flow path. The impellers of low and medium pressure small centrifugal fans are also cast with aluminum alloy.
