There are many ways to install the centering idler group, such as four-bar linkage type, vertical roller mill and intermediate shaft type. The principle is that the belt can be automatically centripetally adjusted by blocking or idler rotating in the horizontal plane to block or generate transverse thrust, and the stress condition is the same as that of the bearing idler group.

The adjustment method of tail roller is just opposite to that of head roller. The specific method is which side of the belt, which side of the idler group moves forward towards the belt, or the other side moves backward.

In general, this method is more suitable for the vertical roller mill with bidirectional operation state or the total length of the vertical roller mill is short. This is mainly because the shorter vertical roller mill is more prone to run off and is not easy to adjust compared with the longer belt conveyor, If the long vertical roller mill adopts this rule, it will affect the service life of the belt.

As a mine milling enterprise, the continuous improvement of equipment technology also means the continuous development of society. The market needs give us more opportunities to display our equipment. 

From the development of recent years, vertical roller mill has obviously become the main equipment for the development of equipment in the mining industry. With the continuous improvement of everyone's awareness of environmental protection, there is no pollution, Green equipment has become the main direction of today's development. 

The main equipment includes jaw crusher, impact crusher, cone crusher and vertical impact crusher. The equipment can be divided into large and small models, However, the current equipment selection still has limitations, only for the miniaturization of output. Only a few people can be satisfied.

In the past, the main bearing is sealed with fine wool felt ring in the traditional vertical roller mill structure, which is easy to wear. Moreover, the dust particles will enter into the main bearing after the cracks between the wool felt ring and hollow shaft after the wear.

This method is also the key reason for abrasive wear and oil blockage of spherical bearing shells. Therefore, during the maintenance, the wear of sealing ring should be checked timely. If the degree is serious, it should be replaced and updated, which will block the dust.

Many manufacturers have also improved and optimized on this basis. In order to avoid oil leakage, the main bearing adopts more advanced piston seal.

Advantages: excellent soft starting performance, linear controllable speed curve when starting, linear controllable speed curve when stopping, good electric braking performance, stepless speed change, excellent controllable performance, closed-loop control, high reliability.

Disadvantages: the price is very expensive, electric control equipment covers a large area, the current single power is more than 400KW, no explosion-proof type, can not be used in coal mines.

Based on the above analysis of the advantages and disadvantages of various driving devices of vertical roller mill, when selecting the driving device of vertical roller mill, we can make the best choice according to the site, production and other specific conditions.

The motor + driving device is specially designed by dodge company for the ultrafine vertical mill. It is a highly reliable mechatronic driving device. It is generally used in the long-distance large ultrafine vertical mill with a length of more than 1000m.

Advantages: good soft start performance, linear controllable speed curve when starting, controllable speed curve when stopping, closed-loop control, no-load starting of motor, simple structure, small maintenance workload, when multiple motors drive, it can be started separately and delayed to reduce the impact of belt conveyor on power grid when starting.

Disadvantages: high requirements for maintenance workers and lubricants, high equipment prices. It is not suitable for the transportation of ultrafine vertical mill and ultrafine vertical mill with speed regulating function.

Analyze the advantages and disadvantages of nine kinds of drive devices, help you choose the right type

1.Y-type motor + torque limiting hydraulic coupling + reducer is a widely used driving device on Ultrafine vertical mill.

2. Disadvantages: the soft starting performance is poor, so it is not suitable to be used in the down transport of ultra vertical mill and ultra vertical mill with speed regulation function.

3. Ultrafine vertical mill is widely used in food, electric power, printing, machinery, chemical industry and other fields.

Because dust will be produced in the process of cement mill, the corresponding sealing device is generally required, but the sealing failure will appear in the production. The causes of seal failure are as follows:

The rubber seal is affected by the oil quality, temperature and time in use. In addition, the improper selection of the material for manufacturing the seal ring makes the seal ring lose its elasticity and the sealing state change, which leads to the failure of the cement mill seal.

Improper installation. During the installation, maintenance and replacement of the seal, due to the incorrect installation, the partial deformation of the seal will lead to the failure of the cement mill seal.

The above are the four major problems that mAy Appear In The Production Of Cement Mill. I hope it can be helpful to your production. If you have any suggestions or questions, you can also leave a message.

When vertical roller mill is broken and running with load, the locking failure is caused by the pressure loss of the hydraulic station, and the adjusting sleeve will rotate with vertical roller mill. If the operator does not find and deal with it in time, it will cause the adjusting sleeve to be stuck, which will lead to the vertical roller mill and shutdown.

The causes of adjusting sleeve sticking may also be poor thread lubrication, wear of adjusting cap seal or dust cover seal, scratch of adjusting sleeve and support sleeve thread, or vertical roller mill, long time overload work, etc.

Cement water demand in vertical roller mill processing has attracted the attention of cement users, especially in the commodity concrete developed areas; more and more users of cement put forward higher and higher requirements for water demand. Concrete producers want to choose cement with small water demand, which will affects the competitiveness and price of cement products, then affecting the cost and benefit of cement producers.

There are many factors that affect the cement water demand in vertical roller mill processing; one of them is grinding process. In other words, different grinding process produced cement; the water demand is not the same. If you want to improve the efficiency of the grinding system, no matter what kind advanced grinding process, we must consider the appropriate water demand of cement technology. Otherwise, we must find a balance between the grinding efficiency, the grinding cost and the water requirement.

At present, there are broken line shaped and circular arc shaped ultrafine vertical mill in the market. The angle of each stage of impact plate has a great influence on the effective crushing force of the material impacting the impact plate, and also has a great influence on the impact and shear crushing effect of the material.

The broken line impact plate has a simple structure, but it can not guarantee the most effective impact crushing of ore. therefore, when purchasing and debugging the impact plate, we must pay attention to the angle of the impact plate, so that when the material collides with the impact plate, it can be perpendicular to the impact plate, so as to improve the production capacity of the impact plate.

The arc-shaped impact plate is commonly used in involute linear structure. The characteristics of this structure are that at each point of the impact plate, the ore is impacted in the vertical direction, resulting in higher crushing efficiency and higher production capacity.