Abstract
Excessive vibration in large-capacity turbine generators can lead to expensive repairs and downtime with associated loss of operational income. Therefore, it is vital to detect the rubbing location in the rotor system at an early stage. The challenge is in achieving this without the expense and labor of complete disassembly. In this study, we present a practical tool for estimating the rubbing locations in a large-capacity rotor system from the shaft vibration patterns at each bearing. The measurement and analysis were performed on the rotor system of an 800-MW class large-capacity turbine generator. Three vibration patterns were observed in the machine operating on-site and were explained in terms of vibration modal analysis and the unbalance response characteristics to identify the rubbing locations. These results will be of interest to industrial engineers and have the potential to increase savings in operation costs.
| Original language | English |
|---|---|
| Article number | 072605 |
| Journal | Journal of Engineering for Gas Turbines and Power |
| Volume | 138 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2016 Jul 1 |
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Keywords
- low-pressure turbine
- rubbing vibration
- rubbing vibration pattern
- shaft unbalance
- turbine rotor system
- vibration mode
- vibration response
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Fuel Technology
- Mechanical Engineering
- Nuclear Energy and Engineering
- Aerospace Engineering
Cite this
Physical Analysis of Rotor-to-Stator Rub in a Large-Capacity Low-Pressure Steam Turbogenerator. / Cha, Seogju; Na, Sung Soo.
In: Journal of Engineering for Gas Turbines and Power, Vol. 138, No. 7, 072605, 01.07.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Physical Analysis of Rotor-to-Stator Rub in a Large-Capacity Low-Pressure Steam Turbogenerator
AU - Cha, Seogju
AU - Na, Sung Soo
PY - 2016/7/1
Y1 - 2016/7/1
N2 - Excessive vibration in large-capacity turbine generators can lead to expensive repairs and downtime with associated loss of operational income. Therefore, it is vital to detect the rubbing location in the rotor system at an early stage. The challenge is in achieving this without the expense and labor of complete disassembly. In this study, we present a practical tool for estimating the rubbing locations in a large-capacity rotor system from the shaft vibration patterns at each bearing. The measurement and analysis were performed on the rotor system of an 800-MW class large-capacity turbine generator. Three vibration patterns were observed in the machine operating on-site and were explained in terms of vibration modal analysis and the unbalance response characteristics to identify the rubbing locations. These results will be of interest to industrial engineers and have the potential to increase savings in operation costs.
AB - Excessive vibration in large-capacity turbine generators can lead to expensive repairs and downtime with associated loss of operational income. Therefore, it is vital to detect the rubbing location in the rotor system at an early stage. The challenge is in achieving this without the expense and labor of complete disassembly. In this study, we present a practical tool for estimating the rubbing locations in a large-capacity rotor system from the shaft vibration patterns at each bearing. The measurement and analysis were performed on the rotor system of an 800-MW class large-capacity turbine generator. Three vibration patterns were observed in the machine operating on-site and were explained in terms of vibration modal analysis and the unbalance response characteristics to identify the rubbing locations. These results will be of interest to industrial engineers and have the potential to increase savings in operation costs.
KW - low-pressure turbine
KW - rubbing vibration
KW - rubbing vibration pattern
KW - shaft unbalance
KW - turbine rotor system
KW - vibration mode
KW - vibration response
UR - http://www.scopus.com/inward/record.url?scp=84958793686&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84958793686&partnerID=8YFLogxK
U2 - 10.1115/1.4032415
DO - 10.1115/1.4032415
M3 - Article
AN - SCOPUS:84958793686
VL - 138
JO - Journal of Engineering for Gas Turbines and Power
JF - Journal of Engineering for Gas Turbines and Power
SN - 0742-4795
IS - 7
M1 - 072605
ER -