Product Description
This product has obtained a patent: Patent for a side air inlet noise reduction and silencing device of pressure-type axial flow local ventilator for underground coal mines (Patent Certificate No. 2583510).
FBD series flameproof press-fit axial flow local ventilator is characterized by a new type, high efficiency, energy saving, and low noise. Because the fan adopts internationally leading three-dimensional twisted, swept, and orthogonal combination blades, the fan airflow is stable, vibration is weak, and it has high operating efficiency. The unique blade structure design also keeps the noise far below the national noise level. Within the standard, environmental pollution is greatly reduced.
At present, the domestically produced FBD series flameproof press-fit axial flow local ventilators often have noise levels of 100-120 decibels in underground environments, greatly exceeding the national noise standards and becoming one of the main noise sources in mines. The physical and mental health of coal miners who work in mines for a long time has a certain impact, and it also affects the further improvement of production efficiency.
Our company, together with scientific research institutions from colleges and universities such as Xi'an Jiaotong University and Dahl Fluid Research Institute, went deep into the use site of local fans in coal mines, conducted on-site analysis of the noise generated by the fans, communicated with ventilation equipment management operators, and confirmed that the current local fans were used. The loud fan noise mainly comes from the radiated noise caused by the friction noise of the air at the air inlet. A variety of noise reduction design solutions have been proposed for this situation. After long-term and large-scale repeated testing and verification, an effective and cost-effective noise reduction solution has been finally determined. Solution - The air inlet adopts a side air inlet structure design.
The original fan inlet air flow direction is parallel to the direction of the fan rotation axis, and the inlet noise is reduced through flow collection and rectification. Due to the design limitations of this structure, the reflected noise is large and the noise reduction effect is not obvious, which has a great impact on the use environment.
Detailed Photos
Product Parameters
| Serial no. |
Machine no. |
Air volume (m3/min) |
Full pressure (Pa) |
Power (KW) |
| 1 |
3.5/4.4 |
133-90 |
715-1320 |
2.2×2 |
| 2 |
4/3 |
111-56 |
172-1800 |
1.5×2 |
| 3 |
4/4.4 |
136-72 |
251-1880 |
2.2×2 |
| 4 |
4/6 |
150-86 |
351-1956 |
3×2 |
| 5 |
5/8 |
210-120 |
331-2503 |
4×2 |
| 6 |
5/11 |
228-132 |
371-2950 |
5.5×2 |
| 7 |
5/15 |
245-150 |
380-3524 |
7.5×2 |
| 8 |
5.6/15 |
274-164 |
375-3750 |
7.5×2 |
| 9 |
5.6/22 |
340-210 |
405-4418 |
11×2 |
| 10 |
5.6/30 |
395-250 |
450-4470 |
15×2 |
| 11 |
6.3/30 |
420-260 |
413-4950 |
15×2 |
| 12 |
6.3/37 |
486-292 |
513-5130 |
18.5×2 |
| 13 |
6.3/44 |
525-310 |
600-5263 |
22×2 |
| 14 |
6.3/60 |
590-390 |
760-5800 |
30×2 |
| 15 |
7.1/60 |
620-396 |
603-6450 |
30×2 |
| 16 |
7.1/74 |
672-480 |
800-6500 |
37×2 |
| 17 |
7.1/90 |
738-400 |
1100-6700 |
45×2 |
| 18 |
8.2/74 |
630-270 |
420-6900 |
37×2 |
| 19 |
8.2/90 |
654-380 |
600-7600 |
45×2 |
| 20 |
8.2/110 |
790-550 |
680-8200 |
55×2 |
| 21 |
8.2/150 |
964-546 |
700-8600 |
75×2 |
| 22 |
10/60 |
1170-814 |
745-2733 |
30×2 |
Company Profile
Contact Us
Company: Zibo Hengding Fan Co., Ltd.
Address: Industrial Park, Beijiao Town, Zhoucun District, Zibo City, Shandong Province, China.
Website: http://hengdingfan.en.made-in-china.com
Cellphone: 0086 198 6252 1678
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