Pump Impeller Balance Correction: What is important in the impeller balance correction is the dimensional uniformity around the rotating bearing, the circularity and the squareness. In the case of fan blades, since they rotate in gas or air, the gas itself has no weight and is greatly affected by the unbalanced eccentric center of gravity in the direction of centrifugal force. However, some dimensional errors can be covered by a balance correction. However, most pumps rotate in a liquid and the liquid has weight. For this reason, when the outer shape of the pump impeller or rotor touches and rotates, or when the surface rotates with its surface inclined to the axis of rotation, in addition to the movement that would normally cause the liquid to flow out smoothly, the pump An action occurs that stirs the liquid inside the casing. As a result, stirring and agitation can cause cavitation, which can loosen the impeller ring or casing ring, and cause accidents and damage if the rings become loose during operation. Pump impellers and rotors are often made of cast metal, but the final shape and dimensions are finished by machining. After replacing the impeller sleeve and ring on the rotating shaft of the old pump with an oversized outside diameter and assembling everything, you can finish the dimensions of the outside diameter of the impeller sleeve and ring after exposing the core of the bearing part. important. Everything must be uniformly perpendicular to the center point of the axis of rotation.
![](https://i.ytimg.com/vi/5sF17UtYMho/maxresdefault.jpg)