Dynamic balancing is the process of running a piece of equipment at a given speed, measuring the dynamic imbalance, and correcting it via the addition or removal of weight. This can be achieved by sending the rotating assembly out to a specialized shop or making the appropriate corrections on-site using field balancing techniques.
Field balancing provides high-quality balance grades with minimal downtime when compared to shop balancing. Another advantage of dynamic field balancing is that the equipment is balanced in place at your specified running speed. Oftentimes, the balance grade achieved with a shop balance can be diminished when the rotating assembly is reinstalled.
Correcting imbalance involves measuring the amplitude of the vibration signal produced by the imbalance and determining the phase (or location of the “heavy spot”) relative to a reference signal. Dynamic balancing is most often performed on industrial fans, hammer mills, and rotating equipment that is too large to remove and place in a conventional balance stand.
Excessive imbalance of rotating equipment can lead to serious mechanical failures and result in unexpected and costly downtime. For these reasons, detecting potential causes early on can be crucial for your operation. In this article, IBT’s Industrial Maintenance Technologies Group (IMT) shares some common factors that require dynamic balancing.
Source: Email/GFMM
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