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  • BSI
    21/30423419 DC BS ISO 22266-1. Mechanical vibration. Torsional vibration of rotating machinery - Part 1. Evaluation of steam and gas turbine generator sets due to electrical excitation
    Edition: 2021
    $44.66
    / user per year

Description of 21/30423419 DC 2021

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 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

  1. steam turbine generator sets connected to the electrical network; and

  2. 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 .



Standard Number21/30423419 DC
TitleBS ISO 22266-1. Mechanical vibration. Torsional vibration of rotating machinery - Part 1. Evaluation of steam and gas turbine generator sets due to electrical excitation
StatusDefinitive
Publication Date2021-07-08
Identical National Standard OfISO/DIS 22266-1
DescriptorsSteam-electric power stations, Rotors (mechanical), Gas turbines, Torque, Frequencies, Steam turbines, Vibration measurement, Turbines, Turbine components, Gas-turbine electric power stations, Mechanical components, Electric generators, Vibration, Vibration testing, Shafts (rotating), Rotating parts
ICS17.160 Vibrations, shock and vibration measurements, 29.160.40 Generating sets
CommitteeGME/21/5
PublisherBSI
Pages44

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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