NVH analysis to prevent imbalance

Imbalance is a condition in which the mass distribution of rotating components, such as the crankshaft, flywheel, or fan, is uneven. This leads to unwanted vibrations and reduced engine performance. It is therefore crucial to detect and correct rotor imbalance to ensure smooth operation and prevent possible damage to the engine.

There are many possible causes of rotor imbalance, including manufacturing variations, wear, accumulation of deposits, damage or misalignment of components, and installation errors. These factors can contribute to motor rotor imbalance and require careful monitoring and maintenance.

The advantages of correct rotor imbalance correction are manifold. In addition to improving the performance and efficiency of machines, it can also extend their service life. This leads to greater operational reliability and can ultimately save costs by avoiding expensive repairs and downtime. Rotor imbalance correction is therefore a critical aspect of machine and plant maintenance that should not be neglected. It contributes significantly to reliability and efficiency in industrial operations.

Specialized knowledge and equipment are required to perform rotor imbalance correction. Technologies such as balancing machines and vibration analyzers play a crucial role in this process. They enable precise diagnosis and correction, which is essential for maintaining the operational readiness and performance of rotating machines. This is exactly where NVH analysis comes into play.

What is NVH analysis and why does it help with imbalance?

NVH analysis (noise, vibration, harshness) examines the noise and vibrations produced by machines.

In rotating machines, it can help to detect and prevent imbalance at an early stage by:

• Measuring vibration patterns and identifying typical frequencies of imbalance.
• Highlighting resonance points so that the design or operation can be adjusted.
• Enabling root cause analysis (e.g., manufacturing tolerances, assembly errors, wear).
• Supporting optimizations, for example in terms of bearings, balancing, or damping.

In short, NVH analyses reveal imbalances through vibration and noise signatures and enable targeted countermeasures to be taken before damage or comfort issues arise.

LTTsmart measurement data acquisition device for ideal NVH analysis

In order to perform an NVH analysis correctly, the right measurement technology is required. The LTTsmart of Labortechnik Tasler GmbH offers the optimal solution. With its measurement accuracy and fast data transfer rate, the data acquisition device is ideal for this area of application. Together with the NVH analysis software "Balancing and Vibrations Analysis" by Siad Zibaei, all math and analysis functions in this area of application can be implemented with high performance.

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