During operation of boiler, the operating situation of the rotating machinery shall be checked once every hour. In special circumstances, it shall be monitored at any moment according to the command of the shift chief-operator The contents to be checked are as follows: 

1. Whether there is abnormal friction phenomenon. 

2. Whether there is abnormal sound. 

3. Whether the oil leaks from the oil level gauge, the indication is correct or not, the oil level is normal( it cannot exceed the upper limit and low limit), the oil quality is clean, the oil ring rotates well and carries oil normally or not. The bearing with grease shall be greased properly on a regular basis.N32 machine oil is used for the induced draft fan, primary fan, secondary air fan and bearing. In blower, N46 machine oil can be used, generally during operation, oil cannot be filled. If there are any abnormal situation, it is required to make a report  to the shift chief-operator and find the maintenance persons for handling. If abnormal situation cannot be treated, then it is required to frequently check and supplement the oil to keep oil level normal; If the oil quality is  deteriorating, the oil shall be completely replaced. 

4. Whether the bearing cooling water is  adequate and the draining pipe is smooth or not; 

5. whether the bearing temperature is normal and vibrating or not, the shaft displacement shall not exceed the specified value. 

6. The safety shelter shall be complete and the anchor bolts shall be firm. 

7. The driving chain and conveying belt shall be in good condition, have no abnormal sound and no crack.

8. The motor current shall have not fluctuation of big margin the electric current shall not exceed the rated value. 

Check the belt coal feeder: 

1. Check whether there are  foreign bodies blocking the coal feeding port of the coal bunker and whether the rotation of belt conveyor is abnormal or not. 

2. whether the sealing is normal and whether there is coal dust flying or not. 

3. Whether the belt conveyor  deviates and the surface cracks or not. 

The electrical persons shall check the operating situations of the frequency converter of  coal feeder 1-2 times per shift. In special circumstances, it is required to strengthen the monitoring according to the shift chief-operator, the contents to be checked are as follows: 

1. Confirm that the environment temperature is from - 21 ℃ to 40 ℃, humidity is 72% or less, and there is no condensate. 

2. Confirm there is no oil mist and dust in the frequency converter. 

3. Confirm that the inverter installation place, and itself have no abnormal sound and vibration. 

4. Confirm that the input voltage and frequency are within the scope of the permit. 

5. Confirm that the cooling fan is operating normally, without sundry jamming and so on. 

6. Confirm that all the indicating lights on the dashboard are effective. 

7. There is no abnormal noise. 

8. There is no overheating or discoloration and so on. The running situation of the motor satisfies the requirements of the Operation Procedures for Plant-use Motor. The motor shell temperature does not exceed 75 ℃.  

Major limitation of the Rotating machinery: 

1. The rolling bearing temperature is not allowed to exceed 80 ℃, the sliding bearing temperature is not allowed to exceed 70℃. When the bearing temperature of each fan of DCS is higher than 75 ℃ , alarm is given; When it is higher than 85 ℃, the fan trips. 

2. The lubricating oil temperature is not allowed to be over 60 ℃. 

3. The shaft displacement  is not greater than 0.2 -- 0.4 mm.

The varieties and quality of lubrication oil used for the bearing of rotating machine shall comply with the requirements. In general situation, the lubricating oil shall be sampled for analysis once every three months. If the  oil quality is not qualified, the oil shall be replaced. When replacement, the new oil is filled, and on the hand the dirty oil shall be discharged, until the oil quality is eligible. Monitoring the hydraulic coupling: 

1. The gear drive device shall be not impacted, have not noise or vibration. 

2. The operating temperature of each bearing does not exceed 70 ℃. 

3. The inlet temperature of the operating oil of the hydraulic coupling shall be ensured to be 60 ℃ or less; the outlet oil temperature shall be 85 ℃ or less. 

4. The inlet pressure of working oil shall be ≥ 0.07 Mpa. If it is below 0.05 Mpa, alarm is given. If is lower than 0.03 Mpa, main motor trips. The oil level of oil tank in operation shall not be less than the minimum oil level line and the oil quality shall be qualified. 

5. Check whether the cooling water of cooler is normal or the water quality is good or not.