Seal Mode Of Vertical Ultrafine Mill
The traditional main bearing of the Vertical Ultrafine Mill is sealed with wool felt ring, easy to be worn and unreliable. Practice has proved that dust particles mainly enter the main bearing through the gap between the worn felt felt and the hollow shaft. The dust particles are the main reason for the abrasive wear and the blockage of the oil path of the ball bearing bushing, so the sealing device should be improved. In the work, the seal mode of the main bearing is improved by using the radial labyrinth seal. The specific method is: the use of the original steel floor for a male and a female two ring, male and female ring according to the requirements of the corresponding car radial labyrinth seal annular labyrinth groove, the male and female ring were installed in the Vertical Ultrafine Mill main bearing cover and the hollow shaft, (butter, put on before installation in the maze slot in order to reduce friction, and a sealing effect).
In this way, the sealing steel ring fixed on the main bearing cover of the Vertical Ultrafine Mill is not moving, and the sealing steel ring fixed on the hollow shaft is running along the hollow shaft, and the sealing maze groove is used to block dust particles and other debris to enter the main bearing of the Vertical Ultrafine Mill. The practice shows that the sealing effect is very good and the running rate of the axle bush is also greatly improved.
Lubrication Technology Of Vertical Ultrafine Mill
The lubrication of the main bearing bush of the 02.2mx6.5m Vertical Ultrafine Mill in the cement plant is usually lubricated by dynamic pressure. This lubrication method is emphatically discussed here.
1, the suitable lubricating oil should be selected and the appropriate additives should be added to improve the lubrication state of the main bearing of the Vertical Ultrafine Mill. The main bearings of the Vertical Ultrafine Mill are characterized by heavy load, high speed and shock and vibration. The size of bearing bush and hollow shaft is large. The further improvement of its shape, dimension accuracy and surface finish is limited by manufacturing and processing conditions. Therefore, the main bearing of Vertical Ultrafine Mill is not guaranteed to be completely liquid lubricated, but is in the state of boundary lubrication. Good boundary lubrication (depending on the performance and strength of the boundary membrane) can significantly reduce the friction coefficient and reduce the wear of the bushing.
Therefore, first of all, the lubricating oil should be selected according to the temperature, the line speed of the hollow axle journal and the load bearing the bearing of the spindle. In the south, N220 and N320 industrial gear oils can be used for 02.2mx6.5m cement Vertical Ultrafine Mill main bearings in winter and in summer. Secondly, because the working temperature of the main bearing of the Vertical Ultrafine Mill outlet is higher than that of the feed end, the load of the main bearing is also larger, so we can consider that the main bearing of the discharging end is to use larger viscosity lubricating oil. A stearic acid polar additive should also be added to the main bearing lubricating oil to improve the strength of the boundary membrane to prevent the rupture of the boundary membrane.
2. According to the normal use period of the lubricating oil, the lubricating oil is added or replaced regularly and properly, and the storage of the lubricating oil and the reutilization of the waste oil are done well.
3. Establish and improve the system of inspecting the grinder. The Vertical Ultrafine Mill operator should regularly check the oil temperature, oil quality and oil content of the main bearing of the Vertical Ultrafine Mill. Especially when the temperature of the main bearing is not normal, the frequency of inspection should be increased. If abnormal is found, it should be reported in time. In practice, there are two major accidents cases most easily paralysis caused by burning tile Vertical Ultrafine Mill industry: one is the oil scraper and fixed with oil ring dislocation caused by loose bolt main bearing cover is fixed on the oil scraper, make the oil scraping, and through the shower shower in the hollow shaft oil groove the journal bearing, caused by lack of oil and burnt; two is due to the dust and other impurities clogging the main bearing base oil return path, fixed with oil ring can not stir up the lubricating oil from the base oil cavity, can also cause due to lack of oil and burnt.