VVM-7 mine fan

Mine counter-rotating fans for local ventilation of dead-end workings with a cross section of 16-35 m2 with air density up to 1.3 kg/m3, temperature from 268 to 308 K, dust content up to 50 mg/m3 and relative humidity up to 95%. Made on the modern aerodynamic scheme with high-pressure characteristic. They have thermal protection with the ability to turn off the fan when the normal temperature and vibration are exceeded.

			VVM-7
ID			40100
Price, UAH			N/A
Nominal flow, m / h			31680
Nominal total pressure, Pa			7100
Nominal diameter, mm			700
Maximum full efficiency			0.64
Rotation frequency, rpm			3000
Electric drive power, kW			50*2
Weight, kg			1030
Length mm			2250
Height mm			1080
Width, mm			1000

Fan VVM has such advantages:

modern aerodynamic scheme with high-pressure;
thermal protection with the possibility of switching off the fan at excess of normal temperature and vibration;
fan blades are made of incombustible materials;
economy;
built-in noise suppressor.

Mine fan VVM-7 is designed for local ventilation of dead-end workings with cross-section up to 16-35 m2 at air density up to 1.3 kg/m3, temperature from 268 to 308 K, dust content up to 50 mg/m3 and relative humidity up to 95%.

The fan is installed in a horizontal position with the permissible deviation of the fan axis from the horizontal not more than 30°.

A distinctive feature of fans of this type is a significantly larger head with a smaller nominal diameter and greater efficiency, due to the absence of losses in the rectifiers and the loss of twisting at the fan output.

If necessary, fans of the VVM type can work with one engine switched on, which increases the economy of the machine. On request, fans can be supplied for 380/660 V and 660/1140 V.