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Roots blower fan is a kind of typical volume

Release date:2015-11-26 00:00 Source:http://www.zqlcfj.com Views:

  Roots blower is mainly according to the flow, pressure head to choose, at the same time satisfy the installation, noise and other requirements. General is to choose form first, such as centrifugal or axial flow. To select models, mainly according to the flow, pressure head, whether to cut blade, how much electricity pause, etc. Finally, effect of other requirements such as noise and first of all, to analyze process on the requirements of the wind, is a constant flow for wind or constant pressure air supply, technology on the extent to which these parameters strictly, once these parameters are destroyed, how the severity of the consequences. Roots blower fan, belongs to the constant flow work is the main parameters of air volume, output pressure along with the change of pipeline and the load change, volume change is very small. Fan, centrifugal fan belongs to the constant pressure work is the main parameters of wind pressure, the output of air volume changes over pipe and load, wind pressure. When these parameters are destroyed, the consequence is serious, you need to take the auxiliary measures, such as: add voltage regulator valve, discharge valve, alarm device and automatic stop device of roots blower and air pressure is not restricted by the fan speed, no matter how the wind speed changes can remain the same. The fan rotation speed and air volume is proportional to the, i.e., Q = KN Q: said air N: for fan speed K: from the formula for coefficient, the air volume adjustment, entirely by the frequency converter to change motor to achieve stepless speed change, rise to adjust the effect of air volume. According to the fan of the 15 hz low frequency field application process, usually at around 35 hz, have individual moment 50 hz full airflow run, due to the basic shaft kiln process is consistent, so in different amount of shaft kiln air regulation is basically the same, every shaft kiln application of frequency conversion technology can obtain 40% energy saving effect. Roots blower a constant torque load, the power saving rate is proportional to the droop or N % = delta N %, though different from general fan and water pump power saving rate is higher, but because of its power is larger, but not bad, as long as the furnace wall is continuous 24 hours work, and start the time also is very long. So electricity saving potential, the high cost of energy saving. After technical innovation of roots blower, changed the past to adjust export (import) valve opening ways to adjust the production mode of wind pressure or volume, reduce Labour intensity, adjust good timeliness, raised the qualification rate of products, consumption decreased obviously. Roots blower is an example of a positive displacement blower, it depends on the change of the rotor displacement, the prime mover to join the mechanical energy is transformed into the gas pressure and kinetic energy. Compared with centrifugal blower, it has a high head, small flow resistance influence, for the wind stability, etc, but in the process of using common exist the shortcomings of low efficiency, high noise. Roots blower use is quite common, especially small and medium-sized chemical plant in chemical plant as fan worsen the labor condition, large noise polluted the environment, thus increasingly aroused people's emphasis on the fan noise, carried out on the fan noise and the mechanism of prevention and control measures of research work. For centrifugal fan and axial flow fan in this study has been gradually perfect, the main roots blower analysis of aerodynamic noise source and its mechanism, on the basis of the combination of application examples, puts forward various methods and reduce the noise, the basic way of roots blower and to reduce the noise was discussed.

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