DIN ISO 10816-2:2010-09

The standards of the DIN ISO 10816 series contain provisions for the evaluation of housing vibration, when measured in situ in the radial direction, that is transversely to the shaft axis, at or next to the main bearings or in the axial direction on thrust bearings. Two criteria are provided for this purpose. One criterion considers the magnitude of the measured vibration; the second one considers changes in the magnitude of the vibration. In addition, different criteria are provided for transient operating conditions, such as run-up and coast-down. The evaluation procedures presented in these standards are based on broad-band measurements of - vibration under normal steady-state operating conditions; - vibration under other (non-steady-state) conditions, that is under transient operating conditions, including run-up or coast-down, initial loading and load changes; - changes in vibration which can occur during normal steady-state operation. The International Standard ISO 10816-2, which forms the basis of this standard, has been prepared by Technical Committee ISO/TC 108 "Mechanical vibration, shock and condition monitoring", Subcommittee SC 2 "Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures", the secretariat of which is held by NALS. German collaboration has been performed through Working Committee NA 001-03-06-02 (NALS/VDI C 6.2) "Messung und Beurteilung von Maschinenschwingungen" ("Measurement and evaluation of machine vibration") of the Acoustics, Noise Control and Vibration Engineering Standards Committee (NALS). DIN ISO 10816-2 applies to steam turbines and generators. However, the evaluation criteria of DIN ISO 10816-2 are not applicable to the electromagnetic excited vibration with twice line frequency at the generator stator core and housing. With respect to DIN ISO 10816-2:2010-06, (in Table A.1) the unit of vibration velocity has been corrected and changed to mm/s.