Performance requirements for fire smoke:
1. It should be able to run normally for a long time under the condition that the medium temperature is not higher than 85 ° C.
2. The operating vibration limit shall comply with the relevant provisions of JB/T8689.
3. It should be guaranteed that when the temperature of the transmitted medium can work continuously for 30 minutes when 280 ° C, it can still run normally when the medium temperature is cooled to the ambient temperature.
4. Under the rated speed and in the working area, the actual pressure curve and the curve given in the instructions of the ventilator shall meet the following regulations:
a) The corresponding pressure deviation of the corresponding flow of the axial flow fire exhaust ventilator is ± 5%.
b) Under the specified flow of centrifugal fans, the corresponding pressure value difference is ± 5%.
5. In the description, the than the noise limit of the A sound level in the description shall comply with the provisions of the JB/T8690.
6. The impeller should be calm, dynamic balance correction.The quality level is not less than G5.6.The material of the balancing block of the leaf wheels should be the same as the leaf wheel material, and it is connected to the impeller by welding and riveting.
7. The impeller of the fire exhaust fan should be performed in accordance with the requirements of JB/T 6445. The speedy speed is 110%of the higher working speed, and the speeding time is not less than 2min.
Structural requirements of fire fire exhaust fan:
1. The motor thermal insulation protection and the air cooling system should be set up in the fan (a ventilator using the H -class insulation -level motor may not be provided with a forced air cooling system).The insulation level of the motor should not be lower than the F -level.
2. The electric motor power leads to the temperature -resistant insulation sleeve tolerance or use high temperature resistance cable.
3. When using A -type transmission, the thermal insulation structure between the case and the motor should be set.