China Environmentally-Friendly Mine Isolated Explosion Type Press-in Axial Flow Local Fan, Find details about China Local Fan, Ventilation System from Environmentally-Friendly Mine Isolated Explosion Type Press-in Axial Flow Local Fan
Environmentally-friendly type FBD (type II) Mine Isolated Explosion Type Press-in Axial Flow Local Fan
(low noise and side air in-let design patented)
Functions
Mine ventilation plays an important role in the mining industry. It's the element guarantee for the mine production.
1) Underground mine ventilation continuously provides a flow of fresh air to the underground working area.
2) Underground mine ventilation provides workers with sufficient volume of air and to dilute and remove noxious gases and mine dust (typically NO, SO2, methane, CO2 and CO).
3) Underground mine ventilation creates good working environment, guarantee the health and safety of underground workers.
By In-depth analysis of the use of local fan fans in underground coal mines, and on-site analysis of the noise generated by the fans, confirmed that the current local fan noise is mainly derived from the radiated noise generated by the frictional noise of air at the air inlet. A variety of noise reduction designs are proposed for this situation The solution, after a long period of repeated trials and verifications, finally determined the most effective and cost-effective noise reduction solution-the side air inlet structure design of the air inlet.
The side air inlet design concept breaks through the original design idea of the fan, so that the air flow follows the curve of the streamlined guide cap, merges with the side air flow and presses into the noise reduction and noise reduction device from the circumferential direction. Part of the reflected noise is sucked in by the guide cap and the guide muffler cone, and the wind current is led in a direction parallel to the rotation axis of the fan. After installation, noise can be reduced by more than 15 dB. Coupled with the optimization of the internal structure of the fan, the frictional radiation noise of the airflow in the casing is further controlled and reduced.
FBD II fan adopts counter-rotating direct transmission, which reduces the guide vane device. While increasing the pressure of the fan, it also straightens out the direction of air flow and reduces the frictional sound of air. The internal structure is optimized to control the internal friction of the machine Radiated noise, the first unique structure design-the side inlet air silencer with national patent has been adopted to change the traditional axial air inlet method, effectively reducing the imported noise. Joint design and processing of special molds improve efficiency and reduce noise. The overall operating noise can be controlled below 90 decibels, and the ultra-low noise characteristics have a significant effect on changing the noise environment of the confined space downhole.
The application of FBD II flameproof pressure-injection axial flow local fans for mines can greatly improve the working environment of coal mine workers in underground mines.
Function and scope of application
FBD II flameproof pressure-injection axial flow local fans for mines is mainly used at coal mines and other industrial department transmits gas, coal dust and flammable gas. It is available for mine digging, building, partial ventilation and tunnel long-distance air supply in the fields of coal mine, metal mine, chemical mine and other mines.
Structure and shape
Working principle
FBD fan consists of two working motors with relative rotation of two-stage impeller. The air enters the grade one impeller from the side wind and gains energy directly into the grade two impeller, supply out after pressure-boosting. The function of grade two impeller is not only to increase the air flow energy, but also behave as static guide vanes in other types of axial flow ventilation, while obtaining the velocity component of the straight and straight circumferential direction, it smoothes the impact of the airflow, increases the energy of the airflow, and reduces the noise.
Characteristic
1.high efficiency, FBD fan is well-designed with state-of-art technology, whose blade adopts the ternary fluid design, which is twisted wing. Large scope of high efficiency working area of fan makes working fan operate at high efficiency working range.