Summary: In the working process, vertical roller mill will have some problems, such as the roller shell loose phenomenon. At the beginning, it is not easy to find this problem and it makes the roller shell wear seriously. ...

In the working process, vertical roller mill will have some problems, such as the roller shell loose phenomenon. At the beginning, it is not easy to find this problem and it makes the roller shell wear seriously. Here we will analyze the reasons and provide solutions.

Reason of Roller Shell Loose

As we all know, the vertical roller mill roller shell is fixed by the bolt. With the grinding of materials, the bolt will be loose and then the roller shell fixed state will be loose. When the materials are grinded in the grinding cavity, the friction of materials will make the roller shell loose. If the inside part of roller shell is damaged, the roller shell also will be loose.

Reduce The Loosening Frequency

In this situation, it requires frequent maintenance. Before each start, it is necessary to check the roller shell for wear and tightness. It is necessary to check the lubrication inside the grinding roller and avoid excessive friction from damaging the grinding roller.

How to Find the Loose Phenomenon?

Before the roller shell loose, it will have some phenomenon. When the roller shells are loose, it will produce some noise. This voice is regular vibration and boring. This sound is different with the normal working machine. When you hear this voice, you need to stop this machine and check the vertical roller mill. If there are no other materials, this indicates that the noise comes from loose roller shells.

A vertical roller mill is equipped with two grinding rollers, and the roller diameter is smaller than that of the millstone. When the millstone moves less than one circle, the roller will move one time. The moving speed is uniform, and when the sound appears, there will be a fixed interval between two sounds, so it is regular.