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2. Defects and signs
2.1 Rotors and rotating parts
2.1.1 Rotor mass imbalance. Unbalance
No matter how carefully a machine is built, it is not possible to align the axis of rotation with the center of gravity of each individual rotor section, which is what characterizes unbalance. As a result, the rotating shaft is subjected to centrifugal forces that deform it. These forces result in vibrations linked to the rotation frequency
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Bibliography
References
Suppliers
(non-exhaustive list)
BENTLY NEVADA (also offers training courses) http://www.bently.com
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VIBROMETER
Standardization
Association française de normalisation (AFNOR) http://www.afnor.fr
- Vibrations des machines tournantes ou alternatives. Spécifications des appareils de mesurage de l'intensité vibratoire. - NF E 90-100 - 12-1985
- Surveillance et diagnostic des machines. Sur- (projet de norme) veillance des vibrations des machines. Partie 1 : procédures générales. - PR NF ISO 13373-1 - 7-2000
- Surveillance et diagnostic...
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