Overview

Local ventilation fans are essential ventilation equipment in the coal mining process, especially the series of explosion-proof, pressure-type, contra-rotating axial flow local ventilation fans. These are widely used for pressure-type long-distance ventilation in the excavation of large and small cross-section roadways in coal mines, and can also be used for ventilation in metallurgical, petrochemical, power, railway, and highway tunnel industries. This series of ventilation fans are reasonably matched with the ventilation parameters of coal mine roadways. This series of fans features high flow rate, high pressure, and high efficiency. However, during operation, they produce harsh aerodynamic and mechanical noise, affecting the physical and mental health of workers in the mining process. Currently, most commonly used local fans use double-layer casings filled with sound-absorbing materials to reduce noise, but the overall radiated noise of the fan during operation is greater than 110dB(A), failing to meet user requirements for low noise.

Therefore, our company has developed low-noise and ultra-low-noise environmentally friendly ventilation fans, reducing various frequency noises to below 85-80 decibels, protecting the physical and mental health of on-site personnel, improving the underground working environment, and achieving environmentally friendly air supply. We have adopted multiple noise reduction measures. Based on the aerodynamic principles of the fan and the principles of noise generation and propagation, we have added a streamlined air intake silencer and an inlet/outlet composite silencer, optimized the structure of the fan unit, and added high-quality sound-absorbing materials for better absorption of mid-to-low frequency noise and efficient isolation of high-frequency noise, eliminating and attenuating overall fan noise.

Front and Rear Double Silencing Structure

The FBD series low-noise front and rear double silencing structure is based on the conventional FBD series explosion-proof, pressure-type, contra-rotating axial flow local ventilation fan, with the addition of an inlet silencer to achieve a double silencing structure at the inlet and outlet. This fan consists of a collector, inlet silencer, primary unit, secondary unit, outlet silencer diffuser, and explosion-proof motor; this ventilation fan features high flow rate, high pressure, high efficiency, and low noise. Its design is excellent, the technology is advanced, and it features energy saving, low noise, serialization, simple structure, convenient maintenance, and strong applicability.

Environmentally Friendly, Conveniently Detachable, Low-Noise Axial Flow Local Ventilation Fan Structure

Considering that the environmentally friendly FBD low-noise axial flow local ventilation fan operates in environments with high coal dust or dust for extended periods, resulting in a large amount of dust or coal ash accumulating inside the silencing layer over time, which significantly reduces the noise reduction effect. Cleaning the original structure is also difficult. Therefore, our company has developed a new convenient and detachable hexagonal environmentally friendly FBD low-noise axial flow local ventilation fan structure;

This structure uses a three-dimensional hexagonal structure, employing automated edge-folding technology and an independent design method, making it convenient for users to replace sound-absorbing materials later; this structure is simple to disassemble and easy to install, meeting user requirements for noise reduction while overcoming the problems of cleaning and replacing noise reduction materials, making it convenient, practical, and cost-effective.

Environmentally Friendly Low-Noise Local Ventilation Fan Structure

The environmentally friendly FBD explosion-proof axial flow local ventilation fan reduces various frequency noises to below 85 to 80 decibels, protecting the physical and mental health of workers, improving the underground working environment, and achieving environmentally friendly ventilation in mines.
The environmentally friendly local fan is a new product improved and designed based on the side-inlet low-noise local fan. The noise is below 80 decibels. The noise reduction measures adopted by the low-noise environmentally friendly local fan are based on the principles of noise generation and propagation, changing the air intake direction, optimizing the structural design, and achieving better absorption of mid-to-low frequency noise and efficient isolation of high-frequency noise, eliminating and attenuating overall fan noise. The modular design, composed of various silencing components, provides users with better selection, modification, and solutions.

Environmentally Friendly FBD Low-Noise Axial Flow Local Ventilation Fan

Local ventilation fans are essential ventilation equipment in the coal mining process, especially the FBD series explosion-proof, pressure-type, contra-rotating axial flow local ventilation fans. These are widely used for pressure-type long-distance ventilation in the excavation of large and small cross-section roadways in coal mines, and can also be used for ventilation in metallurgical, petrochemical, power, railway, and highway tunnel industries. This series of ventilation fans are reasonably matched with the ventilation parameters of coal mine roadways. This series of fans features high flow rate, high pressure, and high efficiency. However, during operation, they produce harsh aerodynamic and mechanical noise, affecting the physical and mental health of workers in the mining process. Currently, most commonly used local fans use double-layer casings filled with sound-absorbing materials to reduce noise, but the overall radiated noise of the fan during operation is greater than 100dB(A), failing to meet customer requirements for low noise.

Therefore, our company has developed low-noise and ultra-low-noise environmentally friendly ventilation fans, reducing various frequency noises to below 85 to 80 decibels, protecting the physical and mental health of on-site personnel, improving the underground working environment, and achieving environmentally friendly air supply. We have adopted multiple noise reduction measures. Based on the aerodynamic principles of the fan and the principles of noise generation and propagation, we have added a streamlined air intake silencer and an inlet/outlet composite silencer, optimized the structure of the fan unit, and added high-quality sound-absorbing materials for better absorption of mid-to-low frequency noise and efficient isolation of high-frequency noise, eliminating and attenuating overall fan noise.

Introduction to Low-Noise Contra-Rotating Axial Flow Fan Patent

Equipment Instructions

Contact Information:

Service Hotline: 0359-2480002 Technical Consultation: 0359-2480003