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 housing of the main unit is fabricated by welding high-quality Q235 steel plates. During welding, we employ an advanced CO2 gas-shielded welding center and an automated CNC straight-cutting machine. For corrosion protection of the fan housing, 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 used are galvanized, ensuring the rigidity, quality, and service life of the fan units 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 shaft sleeves. 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 calculations. 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 are provided to the motor manufacturer based on the ventilation parameters, ensuring that the motor bearing temperature remains within safe limits and that the motor’s service life meets the required standards. The motor is fitted with an oil-injection device, allowing for oiling without shutting down the machine, 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 (stator or 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 with 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 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. The airflow within the duct is under negative pressure, while the cooling airflow around the motor itself is at positive pressure and communicates directly with 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 stipulates 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.