Centrifugal Ventilation Fan Composition Requirements

- Mar 17, 2018-

When the impeller rotates, the gas between the blades of the centrifugal ventilation fan will be effectively affected by its centrifugal force to obtain kinetic energy. The centrifugal ventilator will be effectively discharged from the periphery of the impeller through the orientation of its volute casing and make it The ventilator outlet flow, which will be in the form of negative pressure in the center of the impeller, so that the external flow of air will continue to flow into the supplement, so that the fan can exhaust gas.

The motor of the centrifugal ventilation fan passes the power to the fan impeller through the shaft, so that the rotation of the impeller will effectively transfer energy to the air. Under the effect of the rotation, the air generates centrifugal force, and the air spreads the blades of the fan impeller to the surroundings. At this moment, the fan The larger the impeller, the greater the energy received by the air, which is the greater the head pressure (wind pressure) of the fan.

The centrifugal ventilation fan is mainly composed of a casing and an impeller during the manufacturing process. In the process of manufacturing, the impeller of the small fan is directly mounted on the motor, and the large fan is coupled with the motor through the coupling or the pulley. Centrifugal fans are generally unilateral air intake, with a single stage impeller; large flow can be bilateral intake, with two back-to-back impeller, also known as double suction centrifugal fan.

When the centrifugal ventilation fan is in operation, its impeller is a very important part of the equipment. Its geometry, size, number of blades and manufacturing precision have a great influence on performance. The static balance or dynamic balance correction of the impeller can ensure the smooth rotation of the fan.