Dynamic Response of Rub Caused by a Shedding Annular Component Happening in a Steam Turbine
Rub caused by a shedding annular component is a severe fault happening in a steam turbine, which could result in a long-term wearing effect on the shaft. The shafting abrasion defects shortened the service...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/607674 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Rub caused by a
shedding annular component is a severe fault
happening in a steam turbine, which could result
in a long-term wearing effect on the shaft. The
shafting abrasion defects shortened the service
life and damaged the unit. To identify the fault
in time, the dynamic response of rub caused by a
shedding annular component was studied as
follows: (I) a rotor-bearing model was
established based on the structural features of
certain steam turbines; node-to-node contact
constraint and penalty method were utilized to
analyze the impact and friction; (II) dynamic
response of the rotor-bearing system and the
shedding component was simulated with the
development of rub after the component was
dropping; (III) fault features were extracted
from the vibration near the bearing position by
time-domain and frequency-domain analysis. The
results indicate that the shedding annular
component would not only rotate pivoting its
axis but also revolve around the shaft after a
period of time. Under the excitation of the
contact force, the peak-peak vibration
fluctuates greatly. The frequency spectrum
contains two main components, that is, the
working rotating frequency and revolving
frequency. The same phenomenon was observed from
the historical data in the field. |
|---|---|
| ISSN: | 1070-9622 1875-9203 |