Double silencing structure

The FBD series low-noise double silencing structure is based on the conventional FBD series explosion-proof, pressure-in, counter-rotating axial flow local ventilation fan. It adds an inlet silencer to achieve a double silencing structure at the inlet and outlet. The fan consists of a collector, inlet silencer, primary host, secondary host, outlet silencer diffuser, explosion-proof motor, etc.; This ventilation fan features high flow rate, high pressure, high efficiency, and low noise. It is well-designed and technologically advanced, featuring energy saving, low noise, serialization, simple structure, convenient maintenance, and strong applicability.

Environmentally friendly, convenient, 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, a large amount of dust or coal ash will accumulate inside the silencing layer after prolonged operation. This accumulation on the silencing material significantly reduces the noise reduction effect, and cleaning the original structure is 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 adopts a three-dimensional hexagonal structure, using automated edge folding technology and an independent design method, making it convenient for users to replace the silencing material later; This structure is easy to disassemble and install, meeting users' noise reduction requirements while overcoming the problems of cleaning and replacing the noise reduction material after pollution, 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 of 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 from 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 through better adsorption of mid-low frequency noise and efficient isolation of high-frequency noise, the overall noise of the fan is eliminated and attenuated. The modular design composed of various silencing components can provide 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-in, counter-rotating axial flow local ventilation fans. They are widely used in pressure-in long-distance ventilation in large and small cross-section roadways in coal mines, and can also be used for ventilation and air exchange 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 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 the noise of various frequencies to below 85 to 80 decibels, protecting the physical and mental health of on-site workers, improving the underground working environment of the mine, 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 and outlet composite silencer, optimized the structural design of the fan host, and used high-quality silencing materials to better absorb mid-low frequency noise and efficiently isolate high-frequency noise, eliminating and attenuating the overall noise of the fan.

Introduction to the low-noise counter-rotating axial flow ventilation fan patent

FBD series explosion-proof, pressure-in, counter-rotating axial flow local ventilation fan for mines

Local ventilation in coal mines is essential ventilation equipment in the mining and excavation process, especially the EBD series explosion-proof, pressure-in, counter-rotating axial flow local ventilation fan. It is widely used in pressure-in long-distance ventilation in large and small cross-section roadways in coal mines, and can also be used for ventilation and air exchange 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 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 silencer structure significantly reduces noise. At the same time, the silencer material uses oil-immersed glass fiber felt, which has anti-static and flame-retardant functions. Starting from the design, the fan adopts measures in three aspects: aerodynamic stability, motor electrical noise reduction, and casing noise reduction, effectively reducing the operating noise of the fan; the noise complies with JB/T8690-2014 "Noise Limits for Industrial Ventilation Fans".

Shanxi Jinyuan Anfeng Machinery Co., Ltd. (formerly Shanxi Yunan Fengji Manufacturing Co., Ltd.) is located in 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 currently employs over 120 people, including 20 engineering and technical personnel. It has 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 has hired experts and professors as R&D consultants to keep abreast of industry trends and continuously strengthen technological innovation. With complete production and testing equipment, including laser cutting machines, automatic welding equipment, CNC bending machines, shearing machines, rolling machines, CNC lathes, dynamic balancers, and fan performance testing stations, more than 180 sets of advanced processing and manufacturing equipment, 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 cover 38 series and more than 3,000 specifications of fan products, including FB(D) series, FBC(D)Z series, FKZ series, rail transit SDS series, and tunnel SDF series; supporting products include vertical shaft and inclined shaft self-resetting explosion-proof doors, louver-type automatic regulating air valves, side-opening (vertical) automatic regulating air valves, butterfly valves, silencers, main ventilation fan online detection and fault diagnosis systems, uninterrupted ventilation systems, and intelligent oil injection systems, which can fully meet the ventilation needs of mines and are 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 hard work, anything is possible. 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 processing 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.