Mechanical vibration - Measurement and evaluation of machine vibration - Part 2: Land-based gas turbines, steam turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 600 r/min (ISO 20816-2:2017 + Amd 1:2024)
Abstract
The document provides specific guidance for assessing the severity of vibration measured on both the bearing housings and the shafts of gas turbines, steam turbines and generators in situ. The criteria provided in this document apply to land-based gas turbines, steam turbines and generators with power outputs greater than 40 MW and a normal operating speed of 1 500 r/min, 1 800 r/min, 3 000 r/min or 3 600 r/min. This document provides specific guidance for evaluating the severity of in-situ, broad-band vibration measured radial (i.e. transverse) to the shaft axis on all main bearing housings or pedestals or on the shaft and in the axial direction on thrust bearings. Two criteria are provided for assessing the machine vibration when operating under steady state conditions. One criterion considers the magnitude of the observed vibration; the second considers changes in the magnitude. In addition, different criteria are provided for transient operating conditions, such as run-up and run-down. The evaluation criteria in this document are not applicable to the vibrations caused by electromagnetism, which can occur at twice line frequency at the generator stator core and housing.
Begin
2023-06-26
Planned document number
DIN ISO 20816-2
Project number
00101160
Responsible national committee
NA 001-03-03 AA - Measurement and evaluation of vibration of machines
Responsible international committee
ISO/TC 108/SC 2/WG 1 - Rotordynamics and vibration of machines
draft standard
Mechanical vibration - Measurement and evaluation of machine vibration - Part 2: Land-based gas turbines, steam turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1500 r/min, 1800 r/min, 3000 r/min and 3600 r/min - Amendment 1 (ISO 20816-2:2017/DAM 1:2023); Text in German and English
2024-02
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