МЕЖДУНАРОДНОЕ СОТРУДНИЧЕСТВО
Z i v o s l a v A d a m o v i c
1
,
L j i l j a a n R a d o v a n o v i c
2
THE RESEARCH OF VIBRATION LEVEL EFFECT
ONTO THE DAMAGE OF THE TURBOGENERATOR
ENGINE ROTORS
The amplitude of vibrations and the phase angles and their changes when
the rotor of turbogenerator has cracks are researched in this paper. This
paper deals with two kinds of generator rotor’s damage. In the first case
of damage of turbogenerator rotor, the cracks appeared at the end of
the cogs of the rotor’s active part. In the second case cracks occurred
in the middle of the cross section of the shaft, on the exciting side at the
end of the shaft.
Introduction.
Two kinds of the damage that have appeared on the
generator rotors in a thermoelectric power plant, are analysed in this paper.
The signs of such damages are drawn from the vibration analysis and
loading is also pointed out at which it is necessary to pay special attention
to these signs during exploitation process of turbogenerator.
The arrangement of the turbogenerator rotors is presented in Fig. 1.
There are totally nine rotor places; the nominal number of revolutions
is 3000 1/min. The damages have appeared on the exciting side of the
generator rotor.
The vibration analysis.
For the usual vibrations analysis there is a
vibrations acceptor for vertical direction at each of nine bearings, and with
its help the maximal amplitudes of the vibration path are measured. To
get more information about vibration behaviour in the initial period and
to compare the measuring results with calculations, there are installed the
vibrations acceptors for horizontal and vertical direction, as follows:
— at every bearing;
— at both shaft ends of the generator turbine of high pressure, as well
as of four generator turbines of low pressure (Fig. 2).
Fig. 1.The arrangement of the turbogenerator rotors:
HP rotor with high pressure turbine, LP rotor with low pressure turbines
Статья публикуется в авторской редакции.
1
Zivoslav Adamovic — Professor of University of Novi Sad Technical faculty
“Mihajlo Pupin”;
2
Ljiljaan Radovanovic — Teaching Assistant of University of Novi Sad Technical
faculty “Mihajlo Pupin”.
110 ISSN 0236-3941. Вестник МГТУ им. Н.Э. Баумана. Сер. “Машиностроение”. 2009. № 3
