Too much or too little bearing oil, oil pollution or oil quality is not in line with the lubricating system can ensure the normal operation of the ultrafine mill bearing, prevent foreign matter intrusion and sealing effect, but also eliminate friction heat, reduce friction and wear, and prevent the bearing from overheating Therefore, during production, be sure to ensure the amount and quality of ultrafine mill bearing grease. 

Solution: It is necessary to regularly add oil to the bearing box according to the requirements of equipment use to avoid too much or too little oil. If there is a problem with the oil quality, it is necessary to clean, replace the oil and seal in time. 

After long-term operation, some parts of the ultrafine mill may be severely worn or even broken. Common wear and tear parts include spring springs, bearings, pipe beams, beams and screen frames. The spring should be an important part of the ultrafine mill for shock absorption and noise reduction. 

If the spring is worn or broken, it will not only produce a large noise, but also cause disorder on the screen. Solution: The spring should be replaced in time to prevent production accidents.

First, pay attention to the pre-tightening degree of special screws under the condition that the screw is well lubricated and has no rubber damage.

The rubber is glued to the back of the gate. It is necessary to ensure that the rubber is firmly bonded and the surface is flat. Install the gate when it is fully dry. The special screws are designed according to the selection and structural dimensions.

After pre-tightening, the natural pre-tightening force between the gate and the U-shaped plate of the tank body should meet the design requirements, and no adjustment should be made unless there are special circumstances, otherwise the pre-tightening is too loose or excessive.

Tightening may lead to running water, and the lifting is not smooth. The above are the common mechanical failures of mechanical kaolin milling equipments. In actual production, attention should be paid to the maintenance and maintenance awareness of the kaolin milling equipment.

Troubleshooting and troubleshooting: First of all, when the grinding mill is installed for the first time, the foreign objects in the tank should be removed first, and the large pulley should be turned to confirm whether it rotates flexibly and whether the belt is properly tight. 

Start the inspection to confirm that the belt is running in the correct direction (the correct direction is clockwise when looking down). Make sure that the belt is free of scratches, and then officially start. If the above problems occur during the operation of the grinding mill, the belt should be removed, and the stirring parts should be disconnected for separate investigation. 

The routine inspection part is the motor, the verticality of the motor shaft should be checked, the structure between the motor and the plate, the plate and the bracket is in good condition, the motor can be tested separately for wiring, and the small pulley can be visually checked to see if the operation is stable. 

Influenced by factors such as lubrication, if necessary, please ask professional motor maintenance personnel to carry out maintenance. 

When the feeding is stopped, grinding aids (such as dry coal and quicklime) can be added to the cylinder. After the grinding sound of the ultrafine vertical mill returns to normal, first feed a small amount of material, and then gradually increase the feeding amount until it is normal. 

Always observe whether the current of the main motor of the ultrafine vertical mill increases. If the current increases, it means that the "full grinding" phenomenon of the ultrafine vertical mill has been eliminated, and the feeding amount can be gradually increased. 

Stop the machine to check the compartment board and grate board. If the above methods do not work, the method of stopping and grinding can be adopted. Empty all the steel balls and materials in the barrel of the ultrafine vertical mill, and at the same time clean the attached materials on the liner and steel balls, then reload the balls and start the operation.

In the entire beneficiation process, the investment in grinding equipment can account for more than 50%. Therefore, care should be taken in the selection and operation process. When purchasing grinding equipment, many users will ask the manufacturer about the output of grinding equipment. 

Normally, the output of each vertical roller mill will be maintained within a certain range. If the output of the vertical roller mill suddenly drops, it is likely to be due to the problem of "full grinding", commonly known as "full grinding" or "boring grinding". Literally, "full grinding" means that there is too much material in the barrel of the grinding equipment in a short period of time, which cannot be removed in time, resulting in the loss of balance between the input and output. 

So how to judge whether the vertical roller mill is "full grinding"? What causes the "full grinding" problem of the vertical roller mill? And how do we solve the "full grinding" problem of the vertical roller mill? 

How to judge whether the vertical roller mill is "full grinding"? Just like a person will have symptoms before getting sick, there will also be some signs before the vertical roller mill appears "full grinding", so the operator is required to pay attention to the running state of the vertical roller mill at all times.

Staff need to clean every shift and once a week;All platforms should be cleaned in time, and there should be no dust accumulation. In order to ensure the normal operation of the ultrafine vertical mill and maintain the normal working efficiency of the ultrafine vertical mill, the daily maintenance of the ultrafine vertical mill is essential.

At present, most of the processing plants in my country separate maintenance and daily operations. The maintenance personnel are responsible for repairs, and the operating personnel are responsible for driving. Only a small number of processing plants have "combined transportation and inspection".

For example, each mineral processing project of SBM is in the stage of worker training. The workers will be trained in detail, and the actual operation and maintenance site will be simulated to improve the proficiency of the workers and ensure the normal operation of the daily maintenance and maintenance of the processing plant.

Generally, the return oil temperature of vertical roller mill is not allowed to exceed 60 °C. It is recommended to install a temperature scale or a thermometer, which can directly measure the oil temperature, which is convenient for recording and maintenance.

To check the oil quantity and cleanliness, the oil quantity and cleanliness can be checked through the oil flow indicator, the observation hole on the hollow journal bush cover, the oil level indicator in the fuel tank, etc.

Check whether there is oil leakage, sand and water in the sealing parts of the oil pump, oil circuit and each lubrication point.Before each start of the vertical roller mill, grease must be injected into the motor bearing, pinion bearing, etc., and the sealing and cleanliness of the oil filling place must be ensured.

The oil level and lubrication condition of each lubrication point of the vertical roller mill should be checked at least once every 4 hours.

The daily inspection of the vertical roller mill requires the on-the-job personnel to be familiar with the structure and performance of the equipment and the names, specifications and functions of each component, and inspect the vertical roller mill in accordance with the inspection standards and the time and items specified in the inspection card, and make records. 

Defects within the scope of self-study should be dealt with in a timely manner, and problems outside the scope of self-study should be reported in a timely manner. 

Check the main bearing hydraulic station, motor thin oil station, jet lubrication, oil pressure, oil quantity, oil temperature, oil level and other parameters of the lubrication equipment, and confirm whether it is stable; 

Check the vertical roller mill barrel, barrel Check whether there is ore leakage at the bolt connection with the end cover and the feeding trolley; 

Check whether there is abnormal vibration and abnormal noise in the main bearing, main motor and pinion shaft group, etc., and ensure that the bearing temperature of each part does not exceed 60°C;

The installation process of the main bearing of the ultrafine vertical mill should ensure that the journal and the bearing of the ultrafine vertical mill can run and have good contact performance.

In the process of installation, it is also necessary to ensure that the two hollow shafts have the same axial degree, and the gap between the central shaft and the bearing should be controlled to be between 0.5mm and 1mm, and a certain degree of flexibility should be left on both sides of the free end.

Especially in some areas with large seasonal temperature differences, the shoulder of the hollow shaft and the clearance of the bearing bush are prone to some differences. If the setting is improper, the bearing temperature will be high, and the bearing will be locked.

Therefore, under normal circumstances, when the ultrafine vertical mill is installed in winter, the gap between the outer shoulder of the hollow shaft and the bearing should be smaller than the inner side. Compared with the summer, it is just the opposite.