Aircraft propeller engine balancing

The VM-BAL vibration/balance testing system, as a professional balancing testing system, can provide users with a complete set of balancing solutions by connecting the required sensors, measuring equipment, and professional software.
Dynamic balance measurement is an effective balancing method by integrating test results and professional calculations.

Users can easily and quickly complete the balancing setting and testing process through the VM-BAL software wizard.
The VM-BAL testing system can automatically detect the imbalance points of the tested system and perform necessary compensation measurements. The system can select the compensation mode based on the actual situation. Add or remove counterweights by calculation at the fixed angular position of the rotor.
The system is equipped with an automatic speed detection system, allowing operators to release their hands during the measurement process.
The VM-BAL vibration/balance testing system is a compact system that can be integrated into a suitcase for on-site user operation.

Balance principle
The purpose of balancing
When the center of mass axis of the rotating body itself, commonly known as the "inertia axis", is not concentric with the rotation circle, an imbalance phenomenon will occur, which will produce gravitational force vectors and vibrations. The purpose of balancing is to eliminate the vibrations generated by it, in order to:

• Improve product quality
• Extend equipment lifespan
• Reduce noise, etc

How does imbalance arise
When a component of a device is in a rotating state, all mass components of the component will generate a gravitational vector. If all gravitational vectors converge to zero, the dynamic force acting on the bearing is also zero, which means the rotor is balanced. If all gravitational vectors converge to zero, the combined gravitational vector will cause vibration on the bearing.

testing technology
Test solution
The VM-BAL testing system adopts comparative testing techniques:
VM-BAL records rotational vibration during equipment operation, which is the initial balancing operation;
Next, install a balancing block with known mass and installation position on the rotating mechanism;
Follow closely for calibration operation For dynamic imbalance, two calibration runs are required;
3. VM-BAL compares the signals with and without additional balancing blocks to calculate the initial imbalance;
This testing method is applicable to linear and coherent phase vibration systems, which means:
4. An unbalanced large change can also change the amplitude
At the same time as the phase shift of the unbalanced result, the vibration signal will also have the same phase shift
In fact, the ideal state is usually not achieved Bearings often weaken vibration signals and may cause phase shift errors
Based on the above factors, please do not expect that trying to balance them will lead to success In many instances, it requires repeated balancing processes to achieve satisfactory balancing results
The degree of imbalance cannot be directly measured The test value is the vibration result Does the VM BAL system use ICP? The output piezoelectric vibration sensor is connected to the M302 IEPE/USB converter Sensors can be installed at suitable locations near the bearing housing or other bearings For static balance, one sensor is sufficient to meet the testing requirements, while dynamic balance testing requires two sensors.