Grinding Mill Repair And Maintenance

Common troubles

Causes

Trouble shooting

1, no powder output or low powder output

(1) Backward inhalation of the powder is caused by improper adjustment and bad sealing of the powder-locking device.
(2) the relieving tool is to worn out to handle the raw material.

(1), check and adjust the sealing of the powder-locking device. Seal all the air leakage spots.
(2) Replace the relieving tool with a new one.

2, the finished particles are too coarse or too fine.

(1) the blades of the classifier are severely worn out without the classifying function.
(2) the airflow of the blower is not proper
(3) the rotating speed of the classifier is not proper

(1) if the particle are too coarse, replace the blades and adjust the blower to reduce the airflow of inlet.
(2) if the particles are too fine, enlarge the airflow of the inlet. (3) Adjust the rotating speed of the classifier

3, the current of the main unit and the temperature of the machine go up while the current of the blower drops

(1) the materials is fed too much that the air passage is blocked by the powder. The airflow in the pipes is not discharged smoothly and the circulating airflows get heated so that the current of the main unit and temperature of the machine rise up an the current of the current of the blower drops.

(1) Reduce the quantity of feeding, material and clean the accumulated powder in the air passage.
(2) Open the valve of the residual air pipe and control the temperature of feeding material below 6%

4, the main unit has loud noise and strong vibration

(1) the quantity of the feeding materials is small, or the main motor is not coaxial with the transmission device. There is no gap between two clutches. The ground blots are lose.
(2) the raw materials is very hard which results in strong impact, or there is no material layer.
(3) the grinding rollers and rings are not round or seriously deformed.

(1) Regulate the quantity of feeding material, correct the coaxially, adjust the gap between two clutches.
(2) reduce the particle size of the feeding material.
(3) replace the grinding rollers and ring.

5, the blower vibrates

(1) powder accumulates on the blades, or the blades are worn out and not balanced
(2) the ground bolts are loose

(1) remove the accumulated powder on the blades or replace the blades.
(2) fix the ground blots tightly

6, the transmission device and the oil tank of the classifier become hot

(1) the viscosity of the machine oil is too high to be pumped up to the bearing by the thread pump, so the upper part of the bearing is short of oil.

(1) check whether the model number of the machine oil and its viscosity meet the requirement.
(2) check the rotating direction of the classifier

7, the powder feeding bearing of grinding unit is easy to wear out

(1)lack oil, or the seal ring is worn out
(20lack of long term maintenance and cleaning
(3) the gland bolt is loose

(1)oil timely at regular time
(2) clean periodically an change oil seal
(3) fix the bolts, not leave them loses.