Vibration Diagnostic and Analysis of Rotating Machinery Services
From Diagnostics and Monitoring
The diagnostic of a rotary machine must detect any anomalies, identify their nature and determine the gravity. Vibration analysis is the basic tool, but other investigation techniques are often used to complete the diagnostic, including analyses of the intensity of supply current or the analysis of dynamic values, such as pressure, speed, torque, etc.
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Fault diagnostics are used when an indicator raise...
- Fault diagnostics are used when an indicator raises an alarm: the measured indicator, abnormal noise or a production fault resulting from the malfunction of the means of production.
- It aims to identify the problem, assess the risk and propose solutions.
- The investigation tools are selected for each case according to the symptoms. Vibration analyses are a basic diagnostic tool. Diagnostic by current analysis (FR) is widely used by Dynae, which has published a number of documents on the subject.
- Other dynamic physical phenomena can be measured if necessary: instantaneous speed of rotation, torque, pressure, stress, etc.
- Electro-mechanical analyses are occasional vibration and electric diagnostics that are usually made before a technical stoppage in order to determine the required preventive maintenance actions.
- The dynamic acceptance of a system is a means of accepting new systems.
- It is based on the analysis of sources of excitation, the qualification of the dynamic behaviour of the structure (assembly, frame, base, mountings, foundations, piping, etc.) and the measurement of the environment impact.
- It is also a means of initialising the monitoring of rotating machinery.