SS-ISO-22266-1 › Mechanical vibration -Torsional vibration of rotating machinery - Part 1: Land-based steam and gas turbine generator sets in excess of 50 MW (ISO 22266-1:2009, IDT)
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This part of ISO 22266 provides guidelines for applying shaft torsional vibration criteria, under normal operating conditions, for the coupled shaft system and long blades of a turbine generator set. In particular, these apply to the torsional natural frequencies of the coupled shaft system at line and twice line frequencies of the electrical network to which the turbine generator set is connected. In the event that torsional natural frequencies do not conform with defined frequency margins, other possible actions available to vendors are defined. This part of ISO 22266 is applicable to - land-based steam turbine generator sets for power stations with power outputs greater than 50 MW and normal operating speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 600 r/min, and - land-based gas turbine generator sets for power stations with power outputs greater than 50 MW and normal operating speeds of 3 000 r/min and 3 600 r/min. Methods currently available for carrying out both analytical assessments and test validation of the shaft system torsional natural frequencies are also described.
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17.160 (Vibrations, shock and vibration measurements Including measuring instruments and installations Vibration and shock with respect to human beings, see 13.160 Balancing and balancing machines, see 21.120.40 Vibration protection of buildings, see 91.120.25)
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Oct. 19, 2009