(1) KL series vertical main and auxiliary ventilators. In the past, due to the lack of vertical wind turbines in the country, the mines that used the return air to the shaft, in order to install horizontal main fans such as 2BY, 70B2 and 2B60, must build the wells to connect the curve, the return air, the "S" shaped air duct and the diffusion. Tower and other projects. It wastes a lot of engineering investment and increases the local resistance (usually 15% to 20% of the working pressure of the main fan) and wastes electricity. In order to solve this problem, the K40L, K45L two series vertical main and auxiliary ventilators were developed, and the B5 type IMV1 type mounted motor was used to ensure stable and reliable operation. The vertical fan directly sits on the wellhead, so that the upward wind flow in the wellbore is discharged to the atmosphere through the fan, which not only saves the engineering investment of the above structure (the medium and large mines can save 300,000 to 600,000 yuan), but also eliminates the local Resistance and a lot of ventilation. According to estimates, each K40L-No19 110kW vertical main fan can save 143,000 kWh per year compared with the same size and horizontal main fan of the same power, equivalent to 72,000 yuan of electricity saving. It can be seen that the KL series vertical fans have high promotion and application value. In order to facilitate the installation and overhaul of the vertical fan and improve the practicability, the fan can be fixed on the flatbed and moved horizontally along the rail. The vertical lock structure can also be designed according to the specific conditions of the return air well to provide more for the mine. More convenience.
(2) CK series low pressure large air volume anti-shock wave fan. The shock wave generated by the underground mining blasting operation and the phenomenon of destroying the station are very common in metal mines. Because the underground station can not be set up reliably, which affects the promotion and application of multi-stage station ventilation technology. In order to solve this universal technical problem, based on the mature K series fan technology, the CK42 and CK40 two series low-pressure large-volume anti-shock wave fans have been successfully developed. It consists of a current collector, a main body (including impeller, motor and anti-impact chamber) and a diffuser outlet. Through the use of special structure, reliable strength design and buffer measures, the product's impact resistance is greatly improved, so that it can withstand the impact pressure of 400KPa. The specification model can adapt to the ventilation requirements of the stope or approach of the current metal mine. In November 1996, it passed the ministerial appraisal and reached the international advanced level.
(3) K series stepless speed control fan. Although multi-stage station ventilation is a practical and feasible new technology to ensure ventilation and save ventilation and power consumption, its biggest disadvantage is that the local resistance loss of the station is too large, generally accounting for 45% to 65% of the total resistance of the system; Moreover, it can not achieve rapid and continuous adjustment of the air volume, and can only be adjusted by increasing and decreasing the number of stages of the fan running in the station. In order to solve this critical problem, the K40T and K45T two series stepless speed regulation main and auxiliary fans have been developed. With one speed control fan instead of multiple machines and online station, the impeller speed can be adjusted steplessly according to the needs of production, realizing the on-demand adjustment of air volume, and also laying the foundation for the microcomputer control of multi-stage station ventilation system. The installation of a large-sized speed control fan in the machine hallway can greatly reduce the local resistance loss such as sudden reduction of wind flow, confluence of fan inlet, sudden expansion of wind flow and split of fan outlet, so that the local resistance of the station is reduced by 45% to 65%. Up to 5% to 15%. The ventilation effect is guaranteed, and the energy saving effect is remarkable. Under the condition that the air volume and section of the station are the same, the KT series large speed control fan is used to replace the original multi-machine and the online station, as long as the price does not exceed 5-7 times of the original single fan price, both technically and economically. It is reasonable. Now compare the K40T-8-No20 speed control fan with 4 K40-4-No10 fans and the online station. The price ratio of the speed control fan to the single No10 fan is only 5.5 times. Value.
(4) FK55 series anti-corrosion mining fan. The extraction main fan used in the high sulfur mine is very corrosive. For example, the 62A14-No24 320kW main fan used in Xinqiao Pyrite Mine in Tongling City, Anhui Province, runs the pits and holes through the surface of the multi-blade, causing the impeller to be unbalanced and affecting production. To this end, the mine has specially developed the FK55-8-No26 type 280kW anti-corrosion fan, which was put into normal operation in October 1994. FK55 series anti-corrosion fan adopts direct connection mode between motor and impeller, and the main part is equipped with airfoil type rear guide vane, which also supports the diversion and motor protection cavity, improves the support structure of the motor seat plate and reduces the flow inside the fan. Loss, and therefore high efficiency. The main anti-corrosion measures include: adding motor anti-corrosion protection cavity, and adopting special structure to ensure normal heat dissipation of the motor; the impeller adopts anti-corrosion material; the over-flow surface of other components is fully lined with rubber. FK55 series anti-corrosion mine energy-saving fan is especially suitable for the corrosive working environment common in the main fans of the middle and lower reaches of the Yangtze River, such as pyrite, copper and other main fans. It can also be used for main fan ventilation in other mines.
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