FIELD: electricity.
SUBSTANCE: method comprises an filling wedge input of the elastic waves from the end surface before the wedges installation, after the wedging and when the electrical machine is in use, the measurement of the elastic waves time delays for each wedge and the value calculation (C) - the relative change of the time delays difference of the elastic wave propagation in the wedge. The preload condition is determined by the volume average value C and the dispersion value of the value change C.
EFFECT: control of the rim preload to the frame without the rotor disassembling by measurement of the stressed state change of the wedges providing preload.
5 cl, 2 dwg
