Vibration diagnosis and protection

Our experts also perform in-depth vibration measurements - for example, during unit refurbishment (complete vibration signature) or when investigating specific issues such as unbalance or misalignment. A detailed diagnosis of the machine’s vibration condition is then provided to the customer.

These measurements allow us to track the evolution of a unit’s vibratory behavior over its lifecycle and quickly detect any potential deviations. In the event of a malfunction, automatic alarms and triggers protect the machine. Our experts respond promptly to diagnose the equipment, identify the source and severity of the fault, and advise the owner on appropriate corrective actions.

Methodology

• Defining the protection and monitoring system based on the customer's needs, the equipment involved, and the available budget.
• Selecting appropriate sensors, measurement points, indicators, and threshold values.
• Performing on-site visual inspections, periodic checks, and testing of measurement chains and protection functions.
• Planning the measurement program to minimize unit downtime.
• Equipping the genset with instrumentation (accelerometers, velocimeters, proximeters, tachometers).
• Conducting on-site measurements under real operating conditions across the entire operating range.
• Analyzing results (bearing vibration and temperature trends, spectra, orbits, Bode and polar plots, oil film monitoring, etc.) and presenting them in a comprehensive report.
• Defining and adjusting vibration levels to ensure optimal unit protection.
• Providing vibration diagnostics and recommendations for any necessary operational adjustments.

Specific skills

HYDRO Exploitation specialists:

• offer a complete vibration measurement service, equipped with all necessary tools.
• possess expert knowledge in vibration diagnostics and analysis.
• have a deep and holistic understanding of the construction and operation of all machine components (generators, bearings, turbines, etc.), ensuring accurate diagnoses.
• bring extensive operational experience in managing hydroelectric facilities, providing a comprehensive and pragmatic perspective on each situation.
• recommend effective and tailored solutions for continuous vibration monitoring of operating units.
• deliver a diverse range of specialized services, including balancing, modal analysis, torsional shaft vibration measurements, and more.

Client benefits

The owner of the hydroelectric facility benefits from:

• a comprehensive service provided by experienced specialists, who are among the few Swiss experts in this field.
• accurate and relevant information regarding the vibration behavior of their machines.
• reliable operation of hydraulic power units under optimal conditions, helping to reduce maintenance costs.
• expert recommendations for potential improvements (e.g., alignment, balancing).
• rapid assistance and diagnostics in the event of an alarm or unit shutdown, ensuring maximum availability of these critical power generation systems.