Lubrication has an important influence on the fatigue life and friction, wear, temperature rise, vibration, etc. of the rolling bearing of the vibrating screen. Without normal lubrication, the bearing cannot work. Analysis of the reasons for the damage of the vibrating screen bearing indicates that about 40% of the vibrating screen bearing damage is related to poor lubrication. Therefore, good lubrication of the bearings is an effective measure to reduce bearing friction and wear. In addition, the lubrication of the bearings also has a variety of effects such as heat dissipation, rust prevention, sealing, and shock absorption.
The method of lubricating the vibrating screen bearing is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the bearing.
â—† Grease lubrication
Grease is a lubricant consisting of a base oil, a thickener and an additive. When selecting, you should choose a grease that is very suitable for the conditions of the vibrating screen bearing. Because of the different varieties, there will be great differences in performance, so you must pay attention when choosing.
Grease lubrication can be used after filling the grease for a long time without replenishing, and the structure of the sealing device is relatively simple, so it is widely used.
Commonly used greases for bearings include calcium-based greases, sodium-based greases, calcium-sodium-based greases, lithium-based greases, aluminum-based greases, and molybdenum disulfide greases.
The amount of grease filled in the bearing is preferably 1/2-1/3 of the internal space of the bearing. It should be reduced to 1/3 at high speed. Excessive grease will increase the temperature rise.
â—†Oil lubrication
Under high-speed and high-temperature conditions, oil lubrication can be used when grease lubrication is not suitable. Through the circulation of the lubricating oil, a large amount of heat can be taken away, and it is also effective for reducing vibration and reducing noise.
Generally divided into: (1) oil bath lubrication (2) drip lubrication (3) splash lubrication (4) circulating lubrication (5) jet lubrication (6) oil mist lubrication (7) oil and gas lubrication
â—† Viscosity
Viscosity is an important characteristic of lubricating oil. The viscosity directly affects the fluidity of the lubricating oil and the thickness of the oil film formed by the friction surface. The viscosity of the lubricating oil at the operating temperature of the vibrating screen bearing 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 mechanical oil, high-speed mechanical oil, turbine oil, compressor oil, transformer oil, and cylinder oil.
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Tag: vibrating screen lubrication method mechanical oil calcium-based grease oil film thickness
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