Home > Operational Area > TURBINE
Maintenance and Inspection during Operation of C3-3.43/0.49 Steam Turbine

1. Keep the equipment clean, pay attention to the protection of insulation layer. 

2. At least the readings shall be recorded once every 60 minutes, if the readings of the instrument are found to be different with the normal numerical value, the causes shall be identified. 

3. Regularly inspect and calibrate the instrument. 

4. Regularly inspect the oil system, and 

(1) Keep the pipe clean, smooth and no leakage. 

(2) Regularly flush the oil cooler. 

(3) Discharge the water and oil dirties accumulated on time, supplement new oil, keep the oil level normal and filter screen unblocked.

(4) When the pressure difference between the front and the back oil filters exceeds 0.05 MPa, the filter screen shall be cleaned.

(5) Regularly inspect the quality of turbine steam oil. 

5. The bearing, movable joint of lever and the sliding surface of the front bearing and seat frame shall be regularly filled with lubricating oil and grease. The spherical pull rod on the lever of the regulating steam valve and the spindle of the rotation shaft shall be lubricated with high temperature resistant grease, the fork type joint shall be lubricated with agent of molybdenum disulfide. 

6. The filter mesh of the water filter shall be flushed on a regular basis. 

7. The pneumatic oil pump, electric oil pump and starter shall be tested on a regular basis. 

8. The security systems shall be tested on a regular basis. 

9. The valve stems at the important valves of main control valve and electric isolation valves shall be moved up and down once or twice every day to prevent the valve stem from jamming. 

10. If the steam turbine is often loaded with fixed load, the  load shall be changed on a large scale and the opening of the regulating steam valve shall be inspected. 

11. During operation of the steam turbine , the cycle shall not exceed 50 ± 0.5 Hz. 

12. The oil inlet temperature of each bearing shall be kept between 35 ~ 45 ℃, temperature rise is generally not more than 10 ~ 15 ℃, the lubricating oil pressure shall be kept at 0.08 ~ 0.12 MPa (gauge). 

13.The leakage test of vacuum test and the cleaning of the condenser water side shall be conducted at regular basis. 

14. Unless special reason, the heat recovery system shall not be stopped. 

15. When the standby oil cooler is put into use, attention shall be paid to: 

(1) Check the oil-discharging from oil-discharging valve, it shall be ensured that the standby oil cooler side shall be free of water accumulated and oil dreg. 

(2) Slowly open the inlet throttle of the standby oil cooler to fill oil, at the same time open the gas exhausting cock at oil side to exhaust the air, after the air is totally exhausted, close the cock. Pay attention to that during oil filling, the oil pressure shall not fluctuate. 

(3) Open the gas exhausting cock at water side of the standby oil cooler and water inlet valve(the outlet water valve shall be opened firstly), in order to make water available in the water side. After the water is exhausted, close the gas exhausting cock. 

(4) Slowly turn up the oil outlet valve at the oil side and the water inlet valve of the water side, pay attention to that the lubricating oil pressure and oil temperature shall not fluctuate. 

(5) The pressure of oil side of oil cooler shall not be greater than that of the water side, the cooling water amount is controlled by the water inlet valve.  


Favourite