Common small faults and solutions of pulverizer control
1. The pulverizer will not trip if the control system is not switched on.
First, tripping is caused by short circuit. The pulverizer will not trip if it is not turned on, but it will trip when it is turned on, indicating that the short circuit is caused by vibration after the pulverizer is turned on. Therefore, this fault is most likely due to the broken skin or loose wiring of door protection or forward/reverse travel switch wire, and the control system trip caused by short circuit due to startup vibration
2. During the startup of the pulverizer, it will stop suddenly sometimes, and can be started again after restart.
This situation should be analyzed from the working principle of the crusher. The pulverizer can be started, indicating that the control is normal. However, sudden shutdown sometimes occurs during startup, indicating that this phenomenon is still caused by vibration after startup of the crusher. Please refer to Article 1 for fault causes and solutions.
3. The current of the pulverizer increases and decreases, and the feeding is extremely unstable.
Current reflects the size of equipment load. It is clear that there is a problem with the feeding when the current is suddenly high, but the feeding frequency is certain, indicating that the feeding amount is constant. Then why does the current go up and down? Think about it in depth, because the pulverizer is a special device that can control the positive and negative rotation. Therefore, this problem is caused by the inconsistency between the feeding direction of the crusher and the running direction of the crusher.
4. A lot of materials are sprayed at the feed port of the crusher or in the crushing chamber.
(1) Spraying at the feed inlet of the crusher may be caused by unreasonable adjustment of hammer clearance. It is mainly because the hammer clearance is too large, which causes the pulverizer to spray materials; (2) Another reason is that the feeding direction of the crusher is inconsistent with the running direction of the crusher. After the hammer of the crusher collides with the materials in the opposite direction, some materials will be ejected back, and a lot of materials will accumulate in the crushing chamber after a long time.
5. The pulverizer starts the star contactor to pull in, but the positive and negative main contactors do not pull in.
It is mainly caused by the inconsistency between the on-site forward and reverse travel switch and the forward and reverse selection switch on the control cabinet, or the on-site or forward and reverse travel switches are not pressed and damaged.
6. Low output of the crusher (1) Check whether the crusher reaches the rated current; (2) Check whether the equipment is properly assembled; (3) Check whether the crushing feeding direction is consistent with the direction of the guide plate; (4) Whether the air volume of the fan configured for the pulverizing system meets the requirements.
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