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 22266-1:2022, IDT)

SS-ISO-22266-1 - 2022 EDITION - CURRENT
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This document provides guidelines for the assessment of torsional natural frequencies and component strength, under normal operating conditions, for the coupled shaft train, including long elastic rotor blades, of steam and gas turbine generator sets. In particular, the guidelines apply to the torsional responses of the coupled shaft train at grid and twice grid frequencies due to electrical excitation of the electrical network to which the turbine generator set is connected. Excitation at other frequencies (e.g. subharmonic frequencies) are not covered in this document. No guidelines are given regarding the torsional vibration response caused by steam excitation or other excitation mechanisms not related to the electrical network. Where the shaft cross sections and couplings do not fulfil the required strength criteria and/or torsional natural frequencies do not conform with defined frequency margins, other actions shall be defined to resolve the problem. The requirements included in this document are applicable to a) steam turbine generator sets connected to the electrical network, and b) gas turbine generator sets connected to the electrical network. Methods currently available for carrying out both analytical assessment and test validation of the shaft train torsional natural frequencies are also described. NOTE      Radial (lateral, transverse) and axial vibration of steam and/or gas turbine generator sets is dealt with in ISO 20816-2.

To find similar documents by classification:

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)

29.160.40 (Generating sets)

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Designation Name

SS-ISO 22266-1:2022

Revision Level

2022 EDITION

Status

Current

Publication Date

June 10, 2022

Language(s)

English

Page Count

48

International Equivalent

ISO 22266-1:2022(IDT)