The fan's maximum efficiency should exceed 80%, with an efficiency deviation of 3% between the actual and standard efficiency.
Mar 22nd,202625 Views
Mine Ventilation Fan Standards
Design Requirements
1. The fan's maximum efficiency should exceed 80%, with an efficiency deviation of 3% between the actual and standard efficiency.
2. The fan should have good adjustability to adapt to cumulative changes in mine airflow and pressure. Adjustment methods include: adjustable moving blades, adjustable stationary blades, one-button mechanical adjustment of moving blades when stopped, individual adjustment of moving blades when stopped, and adjustment by changing the main shaft speed.
3. When controlling flow with adjustable moving or stationary blades, the fan should have blade limit devices. The fan casing should have a position indicator and a device to provide electrical signals for remote control.
4. The fan vibration value should be below 4.5 m/s.
5. The fan's main bearing housing and hydraulic adjustment device should undergo a full-load, full-speed functional test for at least 4 hours.
6. The fan's design life should be greater than 20 years.
7. The fan should be equipped with a surge alarm device.
8. The fan noise level should be below 35 dB (A-weighted sound level). 9. Ventilation fans used in coal mines or mines containing flammable and explosive gases such as methane must meet the "friction-free spark test." Motors and electrical equipment located within the flow channel must comply with coal mine explosion-proof standards.
Due to space limitations, only a brief introduction is provided. For more information, please contact us to obtain the implementation standards for mine ventilation fans.
