Our company’s axial-flow fan adopts an integrated structure in which the motor is directly connected to the impeller, eliminating the need for a transmission system. This design features high efficiency, energy savings, low noise levels, and simple installation and disassembly.

The relevant details of our company’s products are briefly described below:

1. Technical features of the product:

When designing fans, we optimize the selection based on the parameters provided by the user and carry out personalized design to ensure that the fan operates with high efficiency both in the initial and later stages.

The chassis of the host machine is welded using high-quality Q235 steel plates. During welding, advanced CO₂ welding technology is employed. ₂ Gas-shielded welding center, automated CNC straight-bar cutting machine, and anti-corrosion treatment for fan housings: Both the inner and outer surfaces undergo sandblasting to remove rust, followed by two coats of epoxy zinc-rich primer and one coat of epoxy zinc-rich topcoat. All bolts are galvanized. These measures ensure the rigidity, quality, and service life of the fans submitted in this bid.

The fan blade is made of high-strength forged aluminum. The blade profile design is based on the latest blade profile experimental data released by the aerospace agency, featuring a three-dimensional twisted structure with a large cross-section and high strength, offering high structural integrity and a wide operating range.

The blades are manufactured using XAero’s most advanced production technology, ensuring product quality.

The hub of the fan is welded together from steel plates of varying thicknesses and bushings. In the design, both the blades and the hub are selected with a safety factor of more than 10, and their strength and the safe operation of the fan are thoroughly ensured through computer analysis. The welding and heat treatment processes used for the hub guarantee that it will remain deformation-free during service. Our factory’s machining equipment ensures that the angular deviation when the blades are mounted on the hub is no greater than 0.5 mm.

The fan is equipped with a dedicated explosion-proof motor. Radial and axial force values, corresponding to the ventilation parameters, are provided to the motor manufacturer to ensure that the motor bearing temperature remains within safe limits and that the motor’s service life meets the specified requirements. The motor is fitted with an oil-injection device, allowing for oiling without shutting down the motor, thus facilitating maintenance. The accompanying electrical control system features protections against phase failure, overload, and over- (or under-) voltage conditions. It can display the temperature of the motor (either the stator or the bearings) and provides both audible and visual alarms.

All components of the fan feature a compact structure and are equipped with vibration-damping rubber pads, ensuring a vibration velocity of ≤4.6 mm/s—meeting the requirements of the national standard. After secondary verification, the fan achieves a G5.6-grade quality through double-sided dynamic balancing. A material performance test report for the blades and a dynamic and static balance test report for the entire impeller are provided as standard.

Our company’s specially designed motor enclosure and silencer can reduce the operating noise of fans to below 85 dB(A), meeting the requirements of national standards. Moreover, they effectively isolate the cooling airflow around explosion-proof motors from the contaminated air flow discharged by the mine’s main ventilation fan. The isolation chamber is equipped with inlet and outlet ducts that connect to the atmosphere outside the motor housing. As a result, the airflow within the duct is under negative pressure, while the cooling airflow around the motor itself is at positive pressure and directly connected to the atmosphere, ensuring adequate heat dissipation for the motor. We have also designed a specialized braking system that fully meets the requirements of Article 122 of the “Coal Mine Safety Regulations” (which mandates the ability to reverse the airflow direction in roadways within 10 minutes).

The damper produced by our company features flexible opening and closing, low power consumption, remote or local operation capabilities, and is equipped with a manual override device.

Shanxi Jin Yun’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 and covers an area of 46,000 square meters. Its fixed assets exceed 36 million yuan, and it currently employs over 120 people, including 20 engineering and technical personnel. The company maintains long-term collaborative relationships with research institutions such as Northwestern Polytechnical University, Taiyuan University of Technology, and China University of Mining and Technology, engaging in technological R&D. It also recruits experts and professors as R&D consultants to stay abreast of industry trends and continuously strengthen its technological innovation capabilities. The company is equipped with complete production and testing facilities, featuring more than 180 advanced processing and manufacturing devices, including laser cutting machines, automatic welding equipment, CNC bending machines, shearing machines, plate rolling machines, CNC lathes, dynamic balancing machines, and fan performance testing stations. It is a specialized fan manufacturer integrating R&D, production, sales, and after-sales service.

The company’s core business focuses on the design, R&D, and manufacturing of various types of ventilators and their complementary products for mines, non-coal mines, rail transit systems, and other applications. Its product portfolio includes 38 series of ventilators—such as the FB(D) series, FBC(D)Z series, FKZ series, rail transit SDS series, and tunnel SDF series—comprising more than 3,000 different specifications. Complementary products include self-resetting explosion-proof doors for vertical and inclined shafts, louver-type automatic regulating dampers, side-opening (vertical) automatic regulating dampers, butterfly valves, silencers, online monitoring and fault diagnosis systems for main ventilators, wind-reversing systems that allow uninterrupted ventilation, and intelligent lubrication systems. These products comprehensively meet the ventilation needs of mines and are exported to diverse domestic sectors as well as international markets including South Africa, Russia, and Southeast Asia.

In recent years, the company has successively been awarded honors such as “Yuncheng Enterprise Technology Center,” “Outstanding Enterprise of Yuncheng,” “Demonstration Enterprise for Intellectual Property in Yuncheng,” and “Innovative Small and Medium-sized Enterprise.” The company has obtained certifications including “ISO9001 Quality Management System Certification,” “ISO14001 Environmental Management System Certification,” and “ISO45001 Occupational Health and Safety Management System Certification.” Its products have also passed the “China National Compulsory Product Certification,” and the company holds numerous patents. Relying on advanced process equipment, strong technical capabilities, excellent product quality, and a comprehensive service system, the company has earned unanimous recognition and praise from a wide range of customers. In particular, in recent years, the company has focused on launching environmentally friendly, low-noise fans into the market, achieving rapid growth and becoming a well-known enterprise that leads the industry in fan technology.

Where there’s sincerity, even metal and stone can be moved. Adhering to the principle of “people-oriented, technology-driven enterprise development” and the belief that “innovation paves the way to the future,” Jin Yun’an Company, backed by its robust technological capabilities, advanced CNC precision machining equipment, an outstanding team of talented professionals, and cutting-edge management practices, remains committed—as always—to providing customers with high-quality mining ventilation equipment and making greater contributions to the safe production and sustainable development of China’s mining industry.