1. What are the hazards of turbine bearing loss?
Causes damage to the journal, and in severe cases dynamic and static friction may cause damage to the turbine.
2. What is the phenomenon of turbine bearing damage?
(1) The temperature of the bearing tungsten metal rises significantly or the bearing smokes.
(2) When the thrust bearing is damaged, the metal temperature of the thrust pad increases.
(3) Tungsten gold powder was found in the oil return.
(4) Turbine vibration increases.
3. What are the causes of turbine bearing damage?
(1) The bearing is out of oil or the lubricating oil amount is too small.
(2) The oil pressure is low, the oil temperature is high, or the oil quality is unqualified.
(3) The bearing is overloaded or the thrust bearing is overloaded, and the oil pressure of the jacking shaft is low or not jacked when turning.
(4) Bearing clearance and tightening force are too large or too small.
(5) Water enters the turbine or water hammer occurs.
(6) Long-term excessive vibration causes bearing damage.
(7) The interlocking of the AC and DC oil pumps is abnormal, and the related interlocking and protection settings are incorrect, resulting in abnormal oil supply during the accident.
4. How to deal with damage to steam turbine bearings?
(1) If the bearing is found to be damaged during operation, the machine should be shut down immediately.
(2) If the cranking cannot be put into operation after shutdown due to bearing damage, the cranking should not be forced. Reliable isolation measures should be taken to prevent water or cold steam from entering the cylinder.
(3) After the bearing is damaged, the oil system should be thoroughly cleaned to ensure that the oil quality is qualified before restarting.
5. Pre-control measures to prevent damage to turbine bearings?
(1) Strengthen the monitoring and adjustment of oil temperature and oil pressure, and closely monitor the bearing tungsten metal temperature and return oil temperature. If any abnormality is found, the cause should be found and eliminated in time.
(2) The oil system equipment is automatic and reliable, and undergoes strict regular testing. During operation, the oil pump or oil cooler should be switched on and off smoothly and carefully to prevent oil cutoff and tile burning.
(3) The oil purification device is operating normally and the oil quality should meet the standards.
(4) Prevent water intrusion, large shaft bending, bearing vibration and damage to the flow part of the turbine.
(5) The turbine generator rotor should be reliably grounded.
(6) Before starting, the interlocking values of the AC and DC oil pumps should be carefully set according to the design requirements, and the wiring should be checked for correctness.
(Source: Internet)