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     gear drive lubrication analysis of the lubrication state of the tooth surface of 1.8 7m mill gear drive a semi-open involute cylindrical spur gear drive, open gear oil sump lubrication, oil tank location in the gear below , the structural integrity of the gear cover, sealing well. Wear is the main failure mode of the ball mill, and many factors affect the wear and tear, such as choice of materials, surface roughness, lubricant selection, the amount of lubricating oil and the oil film thickness, surface structure and shape,jaw crusher seals, lubrication is most effective to reduce wear approach.Elastohydrodynamic theory that liquid lubrication lubrication state two kinds of boundary lubrication and fluid film lubrication, mixed lubrication is not a basic lubrication state, but to describe the frictional properties of various lubrication conditions coexist.

   The low shear strength of boundary film surface when the relative motion is very easy to boundary film shear separation, and this part of the frictional resistance is very low, it will lead to metal surfaces in direct contact has an important influence on wear.The main features of the EHL friction is small, less wear and tear, can buffer the vibration and shock, can gear transmission is running smoothly, improve efficiency and fatigue life. The ball mill gear transmission has been considered to be low speed and heavy lubrication state is mainly in the boundary lubrication mixed lubrication. alicey599 Ball mill gear drive can still achieve a full elastohydrodynamic lubrication.The ball mill tooth surface load of 412MPa, a medium load, the large gear 15 years,[brick making machine:http://www.xbm-aac.com] the amount of wear of only 2.01mm, description of the mill gear drive can be established separating the surface film. Mutual tilt of the ball mill gear drive engages with the tooth surface and the convergence gap formed along the direction of motion relative sliding and rolling between the two meshing tooth surface, involute cylindrical gear drive is able to form a fluid dynamic pressure.Elastohydrodynamic theory is that the contact pressure and deformation of the right to establish the impact of the film can not be ignored, the contact pressure of the lubricating oil viscosity thousands of times higher than the atmospheric pressure, and surface deformation will inevitably affect the hydraulic distribution, these are greatly enhanced the film the carrying capacity, simply choose the appropriate viscosity of lubricants and lubrication methods and structural parameters of the tooth surface to form a fluid dynamic oil film. The choice of gear transmission of the lubricant coonly used lubricants are lubricants (or thin oil), grease (coonly known as dry oil or butter), solid lubricants. (1) grease and blend at high temperatures by the lubricating oil and a variety of thickening agent coonly used the graphite calcium grease, calcium-based grease, lithium grease.

    Various types of fat and thin oil, high bearing capacity, vibration resistance, adhesion ability, but poor mobility, can not be discharged to the tooth surface debris and impurities, the formation of thin boundary film strength is not enough, often resulting in tooth surface poor lubrication and wear, and seriously affect the life of the gear. (2) coonly used solid lubricants are graphite, molybdenum disulfide, coonly molybdenum disulfide by adding asphalt, the lubricant viscosity, poor chip removal, used for a period time, lubricants dry lubrication conditions deteriorate, not suitable for ball mill gear drive. (3) The lubricating oil gear oil, machine oil.Gear oil and mechanical oil, high viscosity,Rotary Kiln oily, contain more polar substances, has a good adsorption pressure and antiwear properties, gear oil than mechanical oil more easily formed between the tooth surface film.Open gear drive speed is not high oil spatter loss, called for adhesion and strong high viscosity gear oil.From the point of view of the elastohydrodynamic theory,Rotary kiln increase the viscosity of the lubricant in the other conditions remain the same conditions, you can get a larger value.A large lubricating ball mill gear drive oil pool circulating lubrication oil pools in the lower part of the large gear.This lubrication method is simple and reliable, the lower part of the large gears iersed in oil, rotation oil to the mating parts, lubricating oil continuously into the mating surface can be formed elastohydrodynamic film will be separated by the tooth surface, thereby preventing tooth wear. Ball mill gear drive,jaw crusher simply choose the appropriate viscosity of the lubricant, lubrication method and structure parameters, the lubrication state of the tooth surface can change the viscosity of elastohydrodynamic lubrication under normal operating conditions, play a decisive role in the effect of the viscous pressure and the tooth surface roughness, In addition, the sealing and maintenance is a can not be ignored, once the pulp or impurities into the mating surface would destroy the film, intensified tooth wear, so be sure to do a good job sealing of the gear drive, regular cleaning of oil, often to observe the oil level. add the oil in a timely manner.