- Tytuł:
-
„Ścieżki pomiarowe” do pomiaru drgań względnych w maszynach elektrycznych
"Measurement paths" used to measure relative vibrations in electric machines - Autorzy:
- Szymaniec, S.
- Powiązania:
- https://bibliotekanauki.pl/articles/1373930.pdf
- Data publikacji:
- 2009
- Wydawca:
- Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
- Tematy:
-
maszyna elektryczna
drgania
pomiar drgań - Opis:
- The article presents the problem of preparing measurement surfaces, the so-called “measurement paths” of electric machine rotors to measure relative vibrations. Measurement of relative vibrations of the rotor shaft is recognised as the most diagnostically useful measurement of machines on slide bearings. Contactless eddy-current sensors used to the measurements are sensible to local mechanical, physiochemical and magnetic anomalies of surface layer of the shaft. The sensors can result in serious interference in measurement of relative vibrations referred to as the runout. Because the runout has two principal sources: the magnetic and the electromagnetic source, there is the mechanical runout and electrical runout. The author carried out own tests to reduce the runout. Reduction of the mechanical and the electric runout succeeded as a result of the following actions: 1. On the shaft of the motor, one has to precisely determine the location of the so-called measurement paths, i.e. places that will be “visible” to relative vibration sensors; beforehand, the place of eddy-current sensors in the motor needs to be anticipated very precisely. The places should be “metrologically” correct. For example, these should not be nodal points of the rotor; they have to be freely accessible during motor operation, etc. 2. Initially deviations in shape of the shaft should be reduce, eliminating burrs, roughness, scratches, indentations, whipping in places expected as measurement paths. It is worth bringing about reduction of shaft whipping while it is rotating in a turning lath to the level of 0.5/100÷1/100 mm. Further reduction of the mechanical runout, reduction of residual stresses, heterogeneity of the structure of shaft surface layer, reduction of the electrical runout, i.e. reduction of residual magnetic field is obtained by successive surface roller burnishing. It is done using a diamond burnisher during slow shaft rotations on a turning lathe.
- Źródło:
-
Maszyny Elektryczne: zeszyty problemowe; 2009, 81; 55-60
0239-3646
2084-5618 - Pojawia się w:
- Maszyny Elektryczne: zeszyty problemowe
- Dostawca treści:
- Biblioteka Nauki
Artykuł