Double-Silencer Structure (Inlet and Outlet)

The FBD series low-noise double-silencer structure (inlet and outlet) is based on the conventional FBD series explosion-proof, pressure-type, contra-rotating axial flow local ventilation fan. It adds an inlet silencer to achieve a double-silencer structure at both the inlet and outlet. This fan consists of a collector, inlet silencer, primary host, secondary host, outlet silencer diffuser, and explosion-proof motor; this ventilation fan features high flow rate, high pressure, high efficiency, and low noise. Its excellent design and advanced technology offer energy efficiency, low noise, serialization, simple structure, easy maintenance, and strong applicability.

Environmentally Friendly, Convenient, Disassemblable, 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, a large amount of dust or coal ash accumulates inside the silencer layer over time. This accumulation on the sound-absorbing material significantly reduces noise reduction effectiveness, and cleaning the original structure is difficult. Therefore, our company has developed a new convenient and disassemblable 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 easy to disassemble and install, meeting user requirements for noise reduction while overcoming the problems of cleaning and replacing contaminated 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 noise across various frequencies to below 85 to 80 decibels, protecting workers' physical and mental health, improving the underground working environment, and achieving environmentally friendly mine ventilation.

The environmentally friendly local fan is a new product improved upon the design of 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 adsorption of mid-to-low frequency noise and efficient isolation of high-frequency noise, eliminating and attenuating the overall noise of the fan. The modular design, composed of various sound-absorbing 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 mining and excavation process, especially the FBD series explosion-proof, pressure-type, contra-rotating axial flow local ventilation fans. They are widely used in the pressure-type long-distance ventilation of large and small cross-section roadways in coal mines, and can also be used for ventilation and air exchange in industrial fields such as metallurgy, petrochemicals, power, railways, and highway tunnels. This series of ventilation fans is reasonably matched with the ventilation parameters of coal mine roadways for excavation construction. This series of fans features high flow rate, high pressure, and high efficiency. However, during operation, the fans generate harsh aerodynamic and mechanical noise, affecting the physical and mental health of workers during mine production. 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 running fan is greater than 100dB(A), failing to meet customer requirements for low noise.

To this end, our company has developed low-noise and ultra-low-noise environmentally friendly ventilation fans, reducing fan noise across various frequencies to below 85 to 80 decibels, protecting the physical and mental health of on-site personnel, improving the underground working environment of mines, 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. The fan host has been structurally optimized, and the addition of high-quality sound-absorbing materials has achieved better adsorption of mid-to-low frequency noise and efficient isolation of high-frequency noise, eliminating and attenuating the overall noise of the fan.

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

FBD Series Explosion-Proof, Pressure-Type, Contra-Rotating Axial Flow Local Ventilation Fan

Local ventilation is essential ventilation equipment in the coal mining and excavation process, especially the EBD series explosion-proof, pressure-type, contra-rotating axial flow local ventilation fan. It is widely used for pressure-type long-distance ventilation in large and small cross-section roadways in coal mines, and can also be used for ventilation and air exchange in industrial fields such as metallurgy, petrochemicals, power, railways, and highway tunnels. This series of ventilation fans is reasonably matched with the ventilation parameters of coal mine roadways for excavation construction. This series of fans features high flow rate, high pressure, and high efficiency.

The side-inlet silencer 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 incorporates measures to reduce noise from aerodynamics, motor electricity, and mechanical aspects, effectively reducing fan operating noise; the noise complies with JB/T8690-2014 "Noise Limits for Industrial Ventilation Fans".

Shanxi Jinyun An Fan Co., Ltd. (formerly Shanxi Yun'an Fan Manufacturing Co., Ltd.) is located in the Yuncheng Economic and Technological Development Zone. Established in 2013, the company has a registered capital of 50 million yuan, covers an area of 46,000 square meters, has fixed assets of over 36 million yuan, and employs over 120 people, including 20 engineering and technical personnel. It maintains long-term cooperation with Northwestern Polytechnical University, Taiyuan University of Technology, China University of Mining and Technology, and other scientific research institutions for technological research and development, and employs experts and professors as R&D consultants to keep abreast of industry trends and continuously strengthen technological innovation. It has complete production and testing equipment, including over 180 sets of advanced processing and manufacturing equipment such as laser cutting machines, automatic welding equipment, CNC bending machines, shearing machines, rolling machines, CNC lathes, dynamic balancers, and fan performance testing stations. It is a professional fan manufacturing enterprise integrating R&D, production, sales, and after-sales service.

The company's main business is the design, R&D, and manufacturing of various ventilation fans and related products for mines, non-coal mines, and rail transit. Products include 38 series and over 3000 specifications of fans, such as the FB(D) series, FBC(D)Z series, FKZ series, rail transit SDS series, and tunnel SDF series. Supporting products include self-resetting explosion-proof doors for vertical and inclined shafts, louver-type automatic regulating air dampers, side-opening (vertical) automatic regulating air dampers, butterfly valves, silencers, online monitoring and fault diagnosis systems for main ventilation fans, non-stop fan reversal systems, and intelligent lubrication systems. It can fully meet the ventilation needs of mines and is sold to various domestic fields and international markets such as Russia and Canada.

In recent years, the company has successively won honorary titles such as "Yuncheng Enterprise Technology Center", "Yuncheng Excellent Enterprise", "Yuncheng Intellectual Property Demonstration Enterprise", and "Innovative Small and Medium-sized Enterprise". The company has passed the "ISO9001 Quality Management System Certification", "ISO14001 Environmental Management System Certification", and "ISO45001 Occupational Health and Safety Management System Certification". Products have passed the "China National Compulsory Product Certification", and obtained multiple patents. With advanced equipment, strong technical strength, excellent product quality, and a perfect service system, it has won the unanimous recognition and praise of a large number of users. In particular, the green, environmentally friendly, and low-noise fans that have been focused on the market in recent years have achieved rapid development, becoming a well-known enterprise with leading technology in the fan industry.

With sincerity and perseverance, even the hardest stone can be broken. Jinyuan'an Company adheres to the tenet of "people-oriented, science and technology for enterprise development" and the belief of "innovation owns the future." Relying on strong technical strength, advanced CNC precision machining equipment, an excellent team of talents, and an advanced management model, we will continue to wholeheartedly provide users with high-quality mining ventilation equipment and make greater contributions to the safe production and development of China's mining industry.