Performance characteristics of multi-wing centrifugal cooling fan

The centrifugal cooling fan is based on the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas, then decelerate, change the flow direction, and convert kinetic energy into potential energy (pressure). In a single-stage centrifugal cooling fan, the gas enters the impeller from the axial direction, changes to a light direction when the gas flows through the impeller, and then enters the diffuser. In the diffuser, the gas changes the direction of flow to cause deceleration, which converts kinetic energy into pressure energy. The increase in pressure mainly occurs in the impeller, followed by the expansion process. In the multi-stage centrifugal cooling fan, a reflux device is used to make the air flow into the next impeller, generating higher pressure.

u003cbru003eQuanzhou Qianyi tells you the performance characteristics of the multi-wing centrifugal cooling fan: the multi-wing centrifugal cooling fan is essentially a variable flow and constant pressure device. When the speed is constant, the pressure-flow theoretical curve of the centrifugal cooling fan should be A straight line. Due to the internal loss, the actual characteristic curve is curved. The pressure generated in the centrifugal cooling fan is greatly affected by the change of the intake air temperature or density. For a given intake air volume, the maximum intake air temperature (air density Lowest) produces the lowest pressure. For a given pressure and flow characteristic curve, there is a power and flow characteristic curve. When the drum cooling fan runs at a constant speed, for a given flow rate, the required power varies with The intake air temperature decreases and increases.