Causes and Countermeasures of low Air Volume and Air pressure of High-pressure centrifugal Fan

When the impeller of high pressure centrifugal fan is working, there are two areas in which the pressure is higher and the pressure is lower. The following are two main reasons why the wind pressure and air volume of the high pressure centrifugal fan are too small:

1. Since there must be a gap between moving parts and fixed parts, it is possible for the fluid to leak from the high pressure zone to the low pressure zone, and the gas leaks from the clearance between the shaft of the fan and the volute, resulting in an external leakage loss.

2.The airflow of the volute near the front disk flows back into the low pressure region of the impeller inlet through the gap between the impeller inlet and the intake port, resulting in internal leakage loss.

The larger the clearance is, the smaller the wind volume and pressure are, and the lower the fan efficiency is. This is not only proved by the test, but also recognized by the majority of fan manufacturers. To this end, the following measures can be taken:

1. use physical methods to narrow the gap too much work, replace fan parts, or overhaul the machine.

2. The chemical method is used to narrow the gap, that is to say, the strong adhesive is filled evenly in the gap. The adhesive has high strength, water resistance, oil, acid, alkali, moisture and heat aging resistance, and is widely used in machinery manufacturing, maintenance, agricultural machinery, furniture.

3. The fan has been tested and tested. The air volume and pressure of the fan are increased, which can effectively improve the operating efficiency of the fan.www.jnblower.com