DIN ISO 10816-2:2010-09

The document provides specific guidance for assessing the severity of radial vibration measured on the bearing housings of steam turbines and generators in situ. The criteria provided in this document apply to land-based steam turbines and generators with power outputs greater than 50 MW and a normal operating speed of 1500 r/min, 1800 r/min, 3000 r/min or 3600 r/min. It also includes steam turbines and/or generators which are directly coupled to a gas turbine (such as for combined-cycle applications). In such cases the criteria of this part of ISO 10816 apply only to the steam turbine and the generator (including synchronizing clutches). Evaluation of the gas turbine vibration should be carried out in accordance with ISO 7919 4 and ISO 10816 4. The evaluation criteria in this part of ISO 10816 do not apply for the electromagnetic excited vibration with twice line frequency at the generator stator core and housing. This part of ISO 10816 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 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 coast-down. The evaluation procedures presented in this part of ISO 10816 are based on broad-band measurements. Compared to DIN ISO 10816-2:2010-06, in Table A.1 the unit of vibration velocity was corrected to be mm/s.