The importance of the conveyor to the vertical roller mill production line need not be said, and the drum is the main component of the conveyor’s transmission of power. What are the faults in the vertical mill production line?
First, the structural aspects of the drum are liable to cause failures. The nut locking structure is adopted, and the locking of the bearing is completely maintained by the expansion force of the locking sleeve. For example, the manufacturing precision of each component is not high, the reliability is poor, and the boring failure is likely to occur. For this reason, the small-diameter roller of the partial easy-to-string shaft can be replaced by the large-diameter roller, and the load on the roller can be increased.
Then, the drum has a failure caused by force. The failure may be related to the processing quality of the metal cylinder and the surface rubber layer. In the vertical mill production line, the drum is composed of a metal cylinder and an outer rubber. Whether the metal cylinder and the outer rubber are uniform during the processing and manufacturing process directly affects the smooth running of the drum. The greater the radial deviation, the greater the eccentric impact force during the drum operation and the greater the jitter. Especially in the counterweight trolley, if the drum has an eccentric force, the counterweight trolley and the drum will resonate during operation, resulting in an increase in the failure rate of the bearing and the locking sleeve.
The failure may also be caused by the excessive angle of the tape wrap. For the reversing roller, since the radial vibration force is generated during the operation when the tape wrap angle is increased, it is easy to fatigue, age and the bearing shaft. The position of the drum can be adjusted appropriately to make the wrap angle moderate and reduce the radial pressure it receives, while ensuring that the force is balanced.
In addition, rubber peeling or wear-off of the outer layer of the cylinder is also a common failure. In the vertical roller mill, the belt conveyor uses the friction between the drum and the conveyor belt to transmit power, which inevitably causes wear. The outer layer of the cylinder is used to protect the cylinder metal. As the wear increases, the peeling or peeling of the rubber, especially the rubber joint, may occur. Therefore, it should be noted that the roller with good coating quality should be used. In the course of use, the rubberized wear condition should also be checked in time. In particular, the rubber vulcanized joint should be inspected. Local damage or cracking of the vulcanization head should be found. Local cold bonding should be carried out; rubber peeling or wear-off occurs. The drum should be replaced and the rubber should be re-coated.