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How to realize the axial flow fan's negative pressure mode?

   Axial fan The work of the blade is similar to that of the aircraft wing. Relatively speaking, axial flow fans are special machines, so it is relatively necessary to familiarise themselves with the key start-up knowledge. What are the points for attention? It should be understood that axial flow fans usually use water-cooled bearings when starting. Therefore, the first thing to do is to check whether the piping of the cooling water inlet pipe is smooth, whether the flow meets the requirements, and ensure that the axial flow fan can run normally. However, the latter is lifting the lift up to the wing and supporting the weight of the aircraft, while the axial flow fan is fixed and moving the air.

  

The cross section of axial-flow fan is usually the wing section. The blades can be fixed or rotate around their longitudinal axis. The angle between blades and airflow or blade spacing can not be adjusted or adjustable. Changing the blade angle or spacing is one of the main advantages of axial flow fans. The small blade spacing angle leads to lower flow rate, while increasing the spacing can result in higher flow rate.

  

The advanced axial fan can change the blade spacing during the operation of the fan, which is quite similar to that of the helicopter rotor, thus changing the flow accordingly. This is called an adjustable blade (VP) axial flow fan. Do not damage the ventilation network at any time when entering the warehouse. If damaged, repair should be made in time. Keep the storage in good condition, the grain is cleared up, and the lower the impurity content is, the better the ventilation efficiency will be. In order to reduce the automatic grading of grain, the location of grain entry point should be changed frequently. After entering the warehouse, the grain surface should be smoothed to ensure that the resistance of the grain piles is uniform.

  

Check ventilation equipment operation status; Axial fan Whether the steering is correct or not; the axial flow fan in the silo is turned to the exhaust air outside the warehouse; in order to reduce the running resistance of the ventilation equipment, there should be no capping material on the grain surface to ensure the smooth flow of the air; open the bottom of the bin and close the upper doors and windows; measure the temperature and moisture of the grain, and then judge whether the ventilation is based on the temperature and humidity conditions of the atmosphere.

  

During the ventilation process, we should strengthen the inspection of the grain situation and the operation of ventilation equipment, find problems and deal with them in time. If condensation occurs, we must not stop the work. We should continue to ventilate and turn over the grain surface. We should analyze and detect the records at any time, observe the changes of grain temperature and moisture, and find out whether there is a phenomenon of ventilation dead ends and invalid ventilation.



Tags:   Axial fan   Mixed flow fan   Exhaust fan
Clicks: Update time: 2017-07-19 10:12:36 [ Print this page [ Close ]
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