DIN ISO 20806:2010-03

Many rotors are balanced in specially designed balancing facilities prior to installation into their bearings on site. However, if remedial work is carried out locally or a balancing machine is not available, it is becoming increasingly common to balance the rotor in situ, i.e. in its own bearings and support structure. Unlike balancing in a specially designed balancing machine, in-situ balancing has the advantage that the rotor is installed in its working environment. However, it has the large disadvantage of restricted access to the rotor and the need to operate the whole machine. This standard specifies procedures to be adopted when balancing medium and large rotors installed in their own bearings on site. It addresses the conditions under which it is appropriate to undertake in-situ balancing, the instrumentation required, the safety implications and the requirements for reporting and maintaining records. The procedures specified in this standard are suitable for medium and large machines. However, many of the principles will be equally applicable to machines of a smaller size, where it is necessary to maintain records of the vibration behaviour and the correction mass configurations. This standard can be used as a basis for a contract to undertake in-situ balancing. It does not, however, provide guidance on the methods used to calculate the correction masses from measured vibration data. The International Standard ISO 20806 on which this standard is based has been prepared by ISO/TC 108 "Mechanical vibration, shock and condition monitoring". The German translation has been prepared by Committee NA 001-03-06-01 UA (NALS/VDI C 6 UA 1) "Auswuchten und Auswuchtmaschinen" ("Balancing and balancing machines").