How to adjust the impeller clearance of Roots blower?

How to adjust the impeller clearance of Roots blower? A problem encountered in the work is the adjustment of the impeller clearance of Roots blower.

I have made some discussions on this issue and now share it with you.

First, I'd like to briefly introduce Roots blower.

Roots blower is a centrifugal fan, mainly composed of impeller, shell, inlet and outlet, etc.

Its working principle is to draw air into the air inlet through the rotating impeller, then compress the air and discharge it from the air outlet.

Roots blower has the advantages of compact structure, small volume, low noise, high reliability, and is widely used in various occasions.

Impeller is one of the components of Roots blower, its quality and accuracy directly affect the performance and efficiency of Roots blower.

The clearance adjustment of the impeller is also a very important part.

Excessive impeller clearance will lead to air leakage, reducing the efficiency of the fan; If the impeller clearance is too small, it will increase the wear of the impeller and shorten the service life of the fan.

Then, how to adjust the impeller clearance?

According to my experience, here are some experiences I have summarized:

1. Understand the structure and working principle of Roots blower.

Only by deeply understanding the structure and working principle of Roots blower, can it be better adjusted.

2. Determine the clearance range of the impeller.

Generally speaking, the clearance range of Roots blower impeller is 0.05mm~0.2mm.

The specific gap size needs to be adjusted according to the actual situation.

3. Use tools to adjust.

Tools needed to adjust the impeller clearance, such as graphite strip, micrometer, etc.

Pay attention to safety when using tools to avoid damage to the impeller.

4. Test after adjustment.

After completing the adjustment of the impeller clearance, a test is required to determine the effect.

Whether the impeller clearance is appropriate can be determined by measuring the pressure, flow and other indicators of the fan.

In general, the adjustment of Roots blower impeller clearance requires certain knowledge and skills.

The effect can only be achieved after in-depth understanding of the structure and working principle of Roots blower and adjustment with tools.

At the same time, attention should be paid to safety during adjustment to avoid damage to the impeller.