Shanxi Jinyun Anfeng Fan Co., Ltd. has always focused on technological investment and product upgrades. It has collaborated with Xi'an Jiaotong University, the Chinese Academy of Sciences, Shanxi Mining Institute, and other scientific and technological institutions. The company also employs more than ten ventilation fan experts and professors as technical consultants for product design and development, ensuring product safety, reliability, and advancement. For example, in blade design, we further improve the advanced three-dimensional twisted blade type of aero-dynamic three-element flow theory by combining bending and sweeping orthogonal types. Through computer flow field calculation and analysis, model machine experiments, and testing, a new type of twisted blade is introduced and applied to local ventilation fans; this makes the fan performance superior, the energy-saving effect more significant, and the noise level lower.

The side-inlet silencing device, combined with the inlet and outlet silencers, significantly reduces noise. The silencer material uses oil-immersed glass fiber felt, which is anti-static and flame-retardant. The fan design addresses aerodynamic noise, motor electromagnetic noise, and mechanical noise to effectively reduce operating noise; the noise level complies with JB/T8690-2014 "Noise Limits for Industrial Ventilation Fans".

Product Features

Underground local ventilation fans for coal mines are essential equipment for safe coal mine production. When operating, these fans generate harsh aerodynamic and mechanical noise. Noise pollution has become the third largest public hazard after air and water pollution. Currently, most domestic local fan noise reduction methods use absorbent materials filled in double-layer casings. The overall radiated noise of the fan is greater than 100dB(A). We can provide users with better solutions for modification and selection.

The design philosophy of the environmentally friendly local fan developed by Shanxi Jinyun Anfeng Fan Co., Ltd. is to reduce various frequency noises to below 80 decibels, protect workers' physical and mental health, improve the underground working environment, and achieve environmentally friendly mine ventilation. The noise reduction measures adopted by the environmentally friendly local fan are based on the principles of noise generation and propagation. By changing the air intake direction, optimizing the structure, and better absorbing low and mid-frequency noise and effectively isolating high-frequency noise, the overall noise of the fan is eliminated and attenuated. The modular design, composed of various silencing components, provides users with better solutions for modification and selection.

Following international quality system standards and based on the company's actual situation, strict regulations are implemented for every product-related process, from raw material procurement, product design, manufacturing, inspection, and testing. Process tracking and recording are performed, and key processes implement quality control points, with inspections conducted through self-inspection, mutual inspection, and specialized inspection.

Raw Material Procurement: Sheet materials must have a material inspection report for the batch, strictly controlling their mechanical properties. Motors must have product qualification certificates, explosion-proof certificates, dynamic balance test reports, and performance test reports.

Key Components: Process control points are established for key processes. Blades use high-quality carbon steel, pressed, welded, and corrected using special molds. Special processing ensures that the blade profile after forming matches the design. Hubs must undergo flaw detection to ensure the overall quality of the impeller.