What are the principles of fan selection?
The author:AdminPopularity:321release
time:2017-08-09
The principles are as follows:
1) Before choosing a ventilator, you should understand the environment and product quality environment of domestic ventilators, such as the type of fans, specifications and the special use of various products, the growth of new products and the implementation of the environment, but also adequate consideration of environmental protection Of the request, in order to choose the preferred fan.
2) According to the ventilation of the physical and chemical differences in the nature of the gas, the choice of divergent use of the fan. Such as the transport of explosives and flammable gases should be selected explosion-proof fan; dust or transport of coal should be selected dust or pulverized coal fan; transport corrosive gases should choose anti-corrosion ventilator; in low temperature places or Transport low temperature gas should choose low temperature fan and so on.
3) in the ventilator choice function chart on the more than two kinds of ventilators available for choice, should give priority to choose a higher effect, the machine smaller: a larger scale, of course, should also be compared, trade-off The pros and cons of the resolution.
4) If the selected fan impeller diameter is larger than the original fan impeller diameter is much larger, in order to apply the original motor shaft, bearings and bearings, etc., must start the motor, the original parts of the fan strength and the critical axis Speed, etc. to stop accounting.
5) When selecting a centrifugal fan, when the electromechanical power is less than or is 75KW, it can not be installed only for the start of the valve. When the discharge of low temperature flue gas or atmosphere and choose centrifugal steam pan fan, should be set to start the valve to prevent the formation of overload when the cold state.
6) The ventilation system with muffled request should be the first choice of high efficiency, low impeller round rate of the fan, and make it the most effective point of things; should also be based on ventilation system noise and vibration of the spread method, Response to the silencing and damping steps. Fan and motor vibration step, as usual can be adopted vibration foundation, such as spring shock absorber or rubber shock absorber and so on.
7) When choosing a ventilator, should only prevent the use of fan in parallel or in series. When not prevent, should choose the same model, with the function of the fan with things. When the series is adopted, there should be some piping contact between the first stage ventilator and the second stage ventilator.
8) The new fans to be used should be sufficient to use the original equipment, proper manufacturing equipment and safe operation and other issues.