What is the reason for the unbalanced balance of the fan wheel impeller?
The author:AdminPopularity:330release
time:2017-08-09
Fan impeller will appear in the use of vibration phenomenon, which is due to impeller balance caused by the problem. What is the reason for the impeller's imbalance?
First: the impeller of the fan is the issue of wear and tear, which is the main reason for the imbalance in the use of the impeller, the wear is caused by dry dust removal device, although it can get rid of the vast majority of large particles of dust in the flue gas, but A small amount of large particles and a lot of tiny dust particles, along with the high temperature, high speed flue gas together through the draft fan, causes the blades to be continuously flushed, thus forming a blade-like wear at the blade exit. Since this wear is irregular, Resulting in impeller imbalance.Also, the impeller surface at high temperatures is easy to oxidation, resulting in thick oxide. These oxide and impeller surface adhesion is not uniform, some of the oxide by the role of vibration or centrifugal force Will automatically fall off, which is caused by impeller imbalance is a reason.
The second is the fan fouling problem is the wet dust removal device to purify the flue gas humidity is very large, not the net dust particles are small, but the viscosity is very large.When they pass the induced draft fan, under the action of the gas vortex will be Adsorption on the non-working surface of the leaves, especially in the non-working surface of the entrance and the exit of the formation of more serious dust fouling, and gradually thickening caused the impeller fouling.
In addition to the above reasons, we will encounter some other reasons, we are in the process of dealing with the actual situation according to the fan, and then solve the problem. In order to better deal with our fans encountered problems.
Fan vibration, the impeller will need to do static and dynamic balance test and calibration, otherwise it will seriously affect the stability of the fan, but also shorten the service life.