The JK series of mine axial flow fans and underground local ventilators for mines are designed based on the ventilation needs of various non-metallic mines such as metallurgy, non-ferrous metals, gold, chemical industry, building materials, and nuclear industry. They are suitable for ventilation in various cross-sectional sizes of tunnels and shafts, air supply in mining areas and electric winch tracks, ventilation in stopes using the sublevel caving mining method, other local ventilation, and certain auxiliary ventilation. They can also be used in tunnel construction, underground engineering construction, and other occasions where air ducts are needed for ventilation.
The design of the JK series of mine axial flow fans and underground local ventilators takes into account the required air volume and smoke and dust exhaust volume for various local ventilation operation surfaces, the distance of air duct air supply, common air duct specifications, air resistance values, and the usage conditions within the mine. The JK series of local fans are divided into three types: single-stage working wheel JK-1, double-stage working wheel JK-2, and counter-rotating operation DJK. Among them, the JK40 series of local fans and the DJK50 series of counter-rotating local fans can be directly installed on the floor of the tunnel, or suspended on the side walls or under the roof of the tunnel.
The JK series of mine axial flow fans and underground local ventilators have the following features:
(1) High operating efficiency. The maximum total pressure efficiency of the single-stage and double-stage working wheels is 92% and 83% respectively, and the maximum total pressure efficiency of the counter-rotating type is 85%, which is 20% to 30% higher than the original JF series of local fans, showing a significant energy-saving effect.
(2) Complete specifications and strong adaptability. The air volume and total pressure values of the local fans have various combinations, and the air supply distance ranges from 80 meters to 600 meters (the air supply distance can reach over 1200 meters when used in series), which can meet the various needs of users.
(3) Small volume, light weight, and easy to move. Compared with the JF series of local fans, the volume is reduced by 20% to 30%, and the weight is reduced by 20% to 30% while maintaining the same performance.
(4) Low noise. The measured noise of the JK№.4 local fan in an open area does not exceed 86db(A). If the user has special requirements for the noise of the local fan, our factory can provide a silencer. Please make a note when placing an order.
The motors of the DJK series of local fans are all 2-pole, with a speed of 2860-2930r/min.
The main technical parameters of the DJK series of local fans are shown in Table 1.
The series and model numbers (types) of the JK series of local fans are indicated as follows: JK 58 – 1 №.4
Mine local exhaust fans: Model “DJK” for counter-rotating local fans. Model “№.3”, with a working wheel diameter D of 300mm; Model “№.5”, with a working wheel diameter D of 500mm; Hub ratio d = 0.58, “56” indicates d = 0.56. The rest follow the same pattern. “67” indicates d = 0.67, “55” indicates d = 0.55. Single-stage working wheel, “2” indicates double-stage working wheel. “40” indicates d = 0.40, “50” indicates d = 0.50.
Main technical parameters of JK series mine axial flow fans and local ventilators for underground mines
