The pressure of roots blower refers to its load pressure capacity, not the pressure that can be generated by roots blower. Roots blower does not generate pressure itself. When we use roots blower to transport air, the front pipe will have its own pressure. In order to transport air, the fan needs to overcome this pressure to transport air.
The main reasons for the pressure reduction of roots blower are: the gap between impellers increases, the gap between impellers, between impellers and wallboards, and between impellers and casings increases. Roots blower is a mandatory gas conveying equipment, and the pressure presented by roots blower is the front resistance, which is often referred to as back pressure. The increase of the gap will lead to serious gas backflow (increased internal leakage), resulting in the reduction of the negative pressure and the appearance of pressure reduction. Other reasons for the pressure decrease: the sealing is reduced, whether it is roots blower or pipeline, if there is gas leakage, it will affect the pressure value of roots blower, and the pressure will naturally fail to meet the rated standard due to serious leakage.
The pressure drop of roots blower is often caused by other faults. If the pressure drop is too large during use, it should be checked and repaired in time to ensure the normal operation of roots blower.
1. Cause of noise expansion
Roots blower has been used for more than ten years, and its overall compactness is reduced. The anchor bolts are loose, the muffler is brittle, and the gap deviation in the middle of each spare part is enlarged, leading to the noise of Roots blower getting bigger and bigger.
2. The working pressure decreases
The key reason for the decrease of the working pressure of roots blower is: the gap between centrifugal impeller and centrifugal impeller, between centrifugal impeller and plate wall, and between centrifugal impeller and housing is enlarged. Roots blower is a mechanical equipment for forced steam transportation, and the working pressure displayed by roots blower is the straight forward friction resistance, which is often referred to as condensing type. The expansion of the gap will cause serious steam flow back (expansion of internal leakage), resulting in the reduction of air pressure and the reduction of working pressure.
Other reasons for the decrease of working pressure: the decrease of airtightness, whether it is the Roots blower or the pipeline, if there is steam leakage, it will endanger the working pressure value of Roots blower. The leakage is relatively serious, and the working pressure certainly cannot meet the rated value specification.
3. Exhaust air volume is too small
The exhaust air volume is too small and the gap of Roots blower is too large. The gap expands and the internal leakage is serious, which will cause the exhaust air volume to decrease. Similarly, in the whole process of transporting the steam body, if the pipeline leaks, the exhaust air volume will also be reduced.
Small exhaust air volume may also be caused by pipeline blockage, which is generally associated with high-pressure and temperature distributed systems. In order to avoid pipeline blockage, regular maintenance of Roots blower is very necessary.
I believe that after reading the above contents, you should also have a better understanding of what is the main reason for the pressure reduction of Roots blower. I hope it will be helpful to you.
Text term label: Roots blower
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