TY - JOUR
T1 - Experimental investigation of dynamic behavior of rotor-bearing system with nitrile rubber support
AU - Dong, Jian
AU - Wang, Xiaojing
AU - Zhang, Jin
AU - Gu, Jingjun
N1 - Publisher Copyright:
© IMechE 2018.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Nitrile rubber (NBR) as a vibration absorber of lower elasticity modulus has a considerable contribution in the effective damping. Three kinds of journal bearings (general journal bearings, journal bearings supported on circular nitrile rubber, journal bearings supported on radial nitrile rubber) were designed and manufactured. Experiments were carried out to investigate vibration and stability of the rotor-bearing system with the above bearings. Oil whirl and the onset of instability of the system was analyzed and compared. The experimental results show that there is a significant decrease in the acceleration amplitude of the bearings embedded with nitrile rubber compared to general journal bearings. In addition, the journal bearings supported on radial nitrile rubber have better vibration damping effect than journal bearings supported on circular nitrile rubber, for there is no obvious oil whirl and asynchronous vibration, which can be verified by waterfall plots and continuous wavelet transform spectrograms. Results demonstrated that vibration energy dissipated by viscous absorbers indeed contributes to improving dynamics stability of the rotor-bearing system.
AB - Nitrile rubber (NBR) as a vibration absorber of lower elasticity modulus has a considerable contribution in the effective damping. Three kinds of journal bearings (general journal bearings, journal bearings supported on circular nitrile rubber, journal bearings supported on radial nitrile rubber) were designed and manufactured. Experiments were carried out to investigate vibration and stability of the rotor-bearing system with the above bearings. Oil whirl and the onset of instability of the system was analyzed and compared. The experimental results show that there is a significant decrease in the acceleration amplitude of the bearings embedded with nitrile rubber compared to general journal bearings. In addition, the journal bearings supported on radial nitrile rubber have better vibration damping effect than journal bearings supported on circular nitrile rubber, for there is no obvious oil whirl and asynchronous vibration, which can be verified by waterfall plots and continuous wavelet transform spectrograms. Results demonstrated that vibration energy dissipated by viscous absorbers indeed contributes to improving dynamics stability of the rotor-bearing system.
KW - Nitrile rubber
KW - asynchronous vibration
KW - continuous wavelet transform
KW - journal bearing
KW - oil whirl
UR - http://www.scopus.com/inward/record.url?scp=85044051892&partnerID=8YFLogxK
U2 - 10.1177/1350650118757067
DO - 10.1177/1350650118757067
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AN - SCOPUS:85044051892
SN - 1350-6501
VL - 232
SP - 1502
EP - 1513
JO - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
JF - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
IS - 12
ER -