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Dear friends, today we want to talk about a very important topic, namely impeller balancing.

Balancing of fan impellers is vital because of the impracticality of working with perfect elements. Factors such as uneven mass distribution and diverse elements make balancing necessary. There are two main methods of balancing - static and dynamic. Static balancing involves a single correction plane and is simpler. Dynamic balancing, with two planes of correction, is more complex and time-consuming. While customers often expect dynamic balancing, static balancing may be sufficient for some components.

Let's learn more about each of them:

Static balancing involves a single correction plane to which the correction weight is attached. The advantage of this method is that it can be identified in the gravitational field, and the added mass is only in one correction plane, which makes it simpler. It can be performed both during motion and without motion if the fan impeller is horizontally mounted on the corresponding shaft. 

Dynamic balancing involves two correction planes. It is more complex than static balancing because adding a correction mass in one plane affects the other. Therefore, you need a balancer that calculates the correction mass for the specified points.  

Dynamic two-plane balancing is more labor-intensive and complex than static one-plane balancing. It is primarily used in fan impellers, where the height-to-diameter ratio is large and also depends on the rotation speed. Dynamic balancing cannot be determined in a gravitational field.

Depending on the relative position of the axis of rotation and the main central axis of inertia, the following types of rotor imbalance are distinguished

  • Static - when these axes are parallel. To eliminate such imbalance, static balancing is performed;
  • Momentary - when the axes intersect in the rotor's center of mass
  • Dynamic (mixed) - when the axes either intersect outside the center of mass or do not intersect but cross in space. Both moment and dynamic imbalances are eliminated by dynamic balancing.

For balancing fans, Blauberg Motoren uses high-quality equipment that meets all requirements and standards, which allows it to achieve the desired balancing class.

The benefits of proper balancing include reduced vibration, quieter operation, longer bearing life and smooth operation. It also prevents resonant vibrations and ensures the durability of the system as a whole.

A growing trend is the customization of balancing equipment for specific manufacturers based on dimensions, weight and operating speeds. Blauberg Motoren fans are balanced in accordance with the requirements of ISO 21940 and ISO 14694:2003, which specify the balancing classes G6.3 and G2.5 (if necessary).

The consequences of neglecting fan impeller balancing include increased vibration, accelerated wear, increased risk of failure, unplanned downtime, reduced product life and increased noise levels. As Blauberg Motoren stands for quality and innovation, the importance of fan impeller balancing is not overlooked, ensuring optimum performance, component longevity and minimizing any risks. Choose quality - Blauberg Motoren!

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