Based on the external conditions when lubricant is supplied to bearings, lubrication methods are divided into two categories: grease and oil. Lubrication is further divided into oil bath lubrication, continuous oil flow lubrication, and intermittent oil flow. There are five types of lubrication: drip lubrication, dispersed droplet and oil mist lubrication. The performance characteristics of various lubrication methods are analyzed, and the technical and economic instructions are comprehensively evaluated, thereby providing the selection principles for rolling bearing debonding methods. The lubrication methods of imported bearings are roughly divided into two types: grease lubrication and oil lubrication. In order to give full play to the functions of imported bearings, it is important to adopt appropriate and correct lubrication methods according to the adjustment and purpose of use. Our Tianjin Meiruide Bearing Co., Ltd. specializes in selling various high-quality imported bearings. We welcome new and old customers to negotiate business.
When selecting grease according to the operating temperature, the main indicators should be the dropping point, oxidation stability and low-temperature performance. The dropping point can generally be used to evaluate high-temperature performance. The actual operating temperature of the bearing should be lower than the dropping point. Point 10-20℃. The service temperature of synthetic grease should be 20-30°C below the dropping point. When selecting grease according to bearing load, grease with small penetration should be selected for heavy loads. When working under high pressure, in addition to small penetration, it must also have high oil film strength and extreme pressure performance. When selecting grease according to environmental conditions, calcium-based grease is not easily soluble in water and is suitable for dry and less moisture-rich environments.
Grease lubrication grease is a lubricant composed of base oil, thickener and additives. When choosing, you should choose a grease that is very suitable for the use conditions of imported bearings. Due to different brands, there will be a big difference in performance, so you must pay attention when choosing. Commonly used greases for bearings include calcium-based grease, sodium-based grease, calcium-sodium-based grease, lithium-based grease, aluminum-based grease and molybdenum disulfide grease. The amount of grease filled in the bearing should fill 1/2-1/3 of the internal space of the bearing. It should be reduced to 1/3 at high speed. Too much grease will increase the temperature rise.
Oil lubrication Under high-speed and high-temperature conditions, oil lubrication can be used when grease lubrication is no longer suitable. Through the circulation of lubricating oil, a large amount of heat can be taken away. Viscosity is an important characteristic of lubricating oil. The viscosity directly affects the fluidity of lubricating oil and the thickness of the oil film formed between friction surfaces. The viscosity of lubricating oil at the bearing operating temperature is generally 12-15 cst. The higher the speed, the lower the viscosity, and the heavier the load, the higher the viscosity. Commonly used lubricating oils include machinery oil, high-speed machinery oil, turbine oil, compressor oil, transformer oil, cylinder oil, etc.