The technological development and innovation trends of centrifugal fans

Centrifugal fan technology, after a century of evolution, is moving towards high efficiency and intelligence. Historical evolution: From brick impellers in the 19th century to modern CFD simulation design, impeller materials have been upgraded from wood and cast iron to alloy steel and carbon fiber, with efficiency increased by over 50%. 2. Breakthroughs in modern technology (1) High specific speed design: By optimizing the number of blades and angles, the specific speed of the new type of centrifugal fan can reach 130, with an efficiency exceeding 75%, which can replace some axial flow fans. (2) Noise reduction technology: By adopting a thickless wind wheel model and active acoustic control, noise is reduced by 2 to 3 decibels. (3) Intelligent application: Integrating sensors and PLC control systems to achieve automatic air volume regulation and fault early warning, such as intelligent flow field optimization of air conditioning units in rail trains.