Oil mist lubrication belongs to the gas-liquid two-phase fluid cooling lubrication technology. As an advanced micro lubrication method, it has been successfully applied to various friction pairs such as rolling bearings, sliding bearings, gears, worm gears, sprockets, etc. In metallurgical machinery, oil mist lubrication is also used for supporting roller bearings in strip mills, working and supporting roller bearings in four roll cold mills, and rolling guides in high-speed wire mills. As early as the 1930s, oil mist lubrication had already appeared in Europe and was not introduced to the United States until the 1950s. The oil mist lubrication system is a low-cost, environmentally friendly, and safe centralized lubrication system consisting of lubricators, nozzles, oil mist transmission pipelines, and lubrication accessories. This lubrication system can continuously and efficiently atomize lubricating oil into small particles, and accurately deliver fresh and clean mist lubricating oil to multiple lubrication points, evenly covering the lubricated parts and lubricating and cooling them. The oil mist nozzle can be selected according to the operating speed of the lubricated object, and each lubricator can be equipped with multiple nozzles. Advantage 1: High lubrication efficiency. Fresh oil mist lubrication can be dispersed with compressed air to the required lubrication friction parts, providing good and uniform lubrication effect to the lubrication parts and greatly improving the service life of transmission components. 2. Compressed air has a low specific heat and high flow rate, which makes it easy to carry away the heat generated by friction, reduce the temperature of the friction pair, and lower the power consumption of the equipment. 3. Significantly reducing the fuel consumption of lubricating oil, the friction pair always maintains fresh and appropriate lubricating oil, and has a spraying effect, which is conducive to the clean operation of the friction pair. 4. The thinner oil circulation lubrication system has a simple and lightweight structure, small footprint, low power consumption, convenient maintenance and management, high degree of automation control, and low cost. 5. Due to the pressure exerted by oil mist, it can effectively seal and prevent external impurities, moisture, and other contaminants from entering the friction pair. 6. Widely used, oil mist lubrication has been applied in rolling equipment and metallurgical machinery. Such as aluminum foil rolling mill, strip steel rolling mill, rotary kiln, ball mill, petroleum, papermaking, fiber machinery, chain conveyor, vibration machine, blower, ore dressing machine, crusher, high-speed spindle and other machinery. 7. The economic benefits are significant. 8. The entire system has almost no moving parts and has high relative operational reliability, which is conducive to long-term safe operation. 9. The use of centralized automatic lubrication greatly reduces the labor intensity of operators. 10. In summary, the oil mist lubrication system has many advantages, and its advantages are more evident in many light load, multi-point, and dusty applications. Especially at high speeds, the advantages of oil mist lubrication are more pronounced. Although oil mist lubrication has good lubrication effect, low fuel consumption, good heat dissipation, and can increase the maximum speed of rolling bearings, it pales in comparison to oil air lubrication. Oil mist must be transported through large-diameter pipelines, usually 2 1/2 ", and the transportation distance is usually 30 meters, with a maximum of 80 meters; It is also difficult to adjust the amount of oil mist, and the viscosity change of the oil has a significant impact on its atomization ability, so it is necessary to strictly control the oil temperature. The gas emitted from oil mist lubrication contains some suspended tiny oil particles, which are harmful to human health. Therefore, ventilation facilities must be installed in places where oil mist lubrication is widely used.