Energy-saving retrofit of box-type centrifugal exhaust fans
When a box-type centrifugal exhaust fan is in operation, due to its internal structure, there are two distinct pressure zones within the unit: one high-pressure and one low-pressure.
At this point, a certain clearance exists between the moving and stationary parts inside the box-type centrifugal exhaust fan, which can affect the fan’s operational performance.
This is because, where there is a clearance, during normal operation, a portion of the fluid leaks from the high-pressure zone through the gap and flows into the low-pressure zone.
Consequently, a portion of the gas generated by the centrifugal exhaust fan leaks through the gap between the rotating shaft and the housing, reducing the unit’s operational efficiency.
So, what methods can be employed to resolve this issue?
Typically, the initial clearance may be relatively small; however, with prolonged use, the impeller of the centrifugal exhaust fan will suffer severe wear, and the housing may become corroded.
In such circumstances, regardless of how the unit is commissioned, the airflow and pressure of the box-type centrifugal exhaust fan will fail to meet the user’s requirements.
Consequently, it is necessary to devise countermeasures based on the specific causes of this issue. Addressing the problem through physical means would not only lead to overload issues but also necessitate the replacement of numerous components, thereby increasing costs; therefore, this approach is not recommended.
However, a chemical solution can be employed to resolve this issue. By directly applying the instant adhesive JZ-AB, the gaps in the box-type centrifugal exhaust fan can be uniformly filled.
This provides a straightforward solution to the problem. Consequently, should this issue arise during the actual operation of the box-type centrifugal exhaust fan, please follow this method to resolve it as promptly as possible.
