When the DK45 shaft flow fan and metal mine ventilator are used as main fans and station fans, they should be equipped with dedicated diffusers. The surface main fan equipped with a diffuser can convert part of the dynamic pressure into static pressure, reduce the dynamic pressure loss at the outlet, and achieve the purpose of energy saving. The fan installed underground, when equipped with a diffuser, can not only reduce the local resistance coefficient but also lower the dynamic pressure value at the diffuser outlet, thereby significantly reducing the local resistance of the fan device and saving ventilation power consumption.
DK45 Mine Axial Flow Fan: Core Structure and Principle of Metal Mine Ventilation Fan
1. Counter-rotating dual-stage design: Two motors of the same power are directly connected to two counter-rotating impellers, eliminating the need for long shafts or belt drives; C-4/Ⅱ type three-dimensional flow twisted wing blades are used, with adjustable angles; a flow stabilizing ring is built into the air duct to prevent surging, and the characteristic curve has no hump.
2. Reverse air flow: No reverse air duct is required; simply reversing the direction of rotation can achieve a reverse air flow efficiency of over 60%.
3. Materials: The shell is made of Q235 steel plate welding, and the blades are hollow steel plates with alloy blade shafts, which are resistant to underground blasting shock waves, moisture-proof and corrosion-resistant.
Model and Key Parameters
• Mainly divided into two series: DK40-6 (6-pole motor, speed 980r/min) and DK40-8 (8-pole motor, speed 730r/min); the model numbers range from 15# to 26#. •
DK45 Mine Axial Flow Fan Parameters for Metal Mines
Model Unit Number Flow Rate (m³/s) Total Pressure (Pa) Motor Model Power (kW)
DK45-6
12 10.7-27.6 698-1374 Y200 L2-6 2×22
13 13.6-35.0 819-1613 Y250 M-6 2×37
14 17.0-43.8 950-1871 Y280M-6 2×55
15 20.9-53.8 1091-2148 Y315S-6 2×75
16 25.4-65.3 1241-2444 Y315M-6 2×90
17 30.4-78.3 1400-2759 Y315 L2-6 2×132
18 36.1-93.5 1570-3093 Y355 M1-6 2×160
19 42.5-109.4 1750-3446 Y355 M3-6 2×200
20 49.5-127.6 1939-3819 Y355 L2-6 2×250
DK45-8
16 18.9-48.7 688-1356 Y280S-8 2×37
17 22.7-58.4 777-1531 Y315S-8 2×55
DK45-8 18 26.9-69.3 871-1716 Y315M-8 2×75
19 31.6-81.5 971-1912 Y315 L1-8 2×90
20 36.9-95.1 1076-2119 Y315 L2-8 2×110
21 42.7-110.1 1186-2336 Y355 M2-8 2×160
22 49.1-126.6 1302-2563 Y355L2-8 2×200
Performance features of DK45 shaft fan for metal mines:
1. High efficiency and energy saving: Tri-dimensional flow design + direct drive, high operating efficiency, and significant long-term power savings.
2. Stable and safe: Anti-surge steady flow ring, no risk of shaft breakage; resistant to impact, suitable for complex underground environments.
3. Flexible and adjustable: Adjustable blade angle to meet the air volume / air pressure requirements of the mine at different periods.
4. Simple installation and maintenance: Compact structure, low civil construction cost; direct drive design reduces transmission faults and maintenance.
DK45 shaft flow fan, metal mine ventilation fan application scenarios
• Ground main fans and underground auxiliary fans for metal and non-metal mines; core fans for multi-stage station ventilation systems; ventilation for tunnels and civil air defense projects.
• Can be installed on the ground or directly placed in underground stations.
