1. Rotors and unbalances
1.1 Rotors
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A rotor consists of a shaft on which the active parts (wheels, windings, gears, etc.) are mounted. It is held in the stator by rotating connections (radial bearings and an axial thrust bearing); the journals are the parts of the shaft facing the bearings. A cantilever coupling transmits the drive torque.
Figures 1 (schematic diagram of an electrical machine) and 2 (alternator rotor) show inter-bearing rotors with the active part located between the trunnions. Figures
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Rotors and unbalances
Balancing criteria
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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