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5. Balancing flexible rotors
The quest for excellent vibration behavior of machines on site leads to balancing as close as possible to operating conditions, i.e. :
higher out-of-balance excitations at high speeds, resulting in improved sensitivity;
often supercritical operation, with flexible rather than rigid rotor balancing techniques;
higher drive power, requiring special balancing systems;
throws over the entire speed range to cover low-speed operation (start-up), critical speeds and the normal range of continuous operation.
These techniques also cover in-situ balancing, the most complex case of which is that of the shaft lines of large turboalternator sets in power generation plants (alternator driven by a turbine comprising a...
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Balancing flexible rotors
Bibliography
- BIGRET (R.), KARAJANI (P.), VIALARD (S.), CHEVALIER (R.) - Machines tournantes – Détermination des coefficients d'influence par les caractéristiques modales. - Deuxième conférence MSTDAV (Méthodes de surveillance et Techniques de diagnostic acoustiques et vibratoires), Senlis (France). Revue française de mécanique n° 1995-4, p. 277-283...
Suppliers of balancing equipment
Balancing machines
IRD Mechanalysis
REUTLINGER France
SCHENCK https://www.schenck-rotec.fr/
Balancing software
a) See the three companies above
French and international standards
- Mechanical vibration – Balancing. Vocabulary . - ISO 1925 - 2001
- - ISO 2041 - 1990
- Vibration and shock – Vocabulary. - ou NF E 90-001 - 06-1993
- Mechanical vibration and shock – Balancing vocabulary . - NF E 90-002 - 10-1984
- Critères d'équilibrage des rotors en état rigide . - NF E 90-600 - 10-1985
- Mechanical vibration – Balancing quality requirements for rotors...
International congresses and corresponding conference proceedings
a) ASME – TURBO EXPO (alternating odd-numbered years in the USA, even-numbered years in Europe)
ASME (American Society of Mechanical Engineers) and IGTI (International Gas Turbine Institute) http://www.asmeconferences.org
b) Turbomachinery Symposium...
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