Bearing lubricating oil and grease selection and performance principle - bearing knowledge

Lubricating oil and grease the bearings used in the process of common lubricant, we to the bearing maintenance, the operation of the lubrication of the bearing has a lot of help, such as to reduce the friction coefficient, etc. That we need when choosing bearing lubricating oil and grease lubrication for understanding? China bearing network to tell you, the first to know the bearing lubricant, what are you need the understanding lubricant performance options, and then to understand the principles of the bearing lubricant used, finally select lubricant. This bearing in lubrication to ensure that the most reasonable lubrication effect. Bearings commonly used lubricants, lubricating oil - — Liquid, USES the most widespread; Grease - — Semisolid, generally used in low speed; A mainly used as solid lubricant oil, grease additives, also can be used alone. The performance of the lubricating oil selection: viscosity - — The flow of liquid in the size of the internal friction resistance. Is the most important performance indexes, as well as choose the main basis of lubricating oil. Oily - — Also calls the lubricity, characterization of oil in the polar molecules adsorbed on the surface of metal performance. Oily, small friction coefficient. Condensation point - — Reflect the lubricating oil low temperature performance. Flash point - — Reflect the high temperature performance of lube oil. Lubricating oil selection principles: 1, pressure or work under impact, variable load condition, choose the high viscosity oil; 2, high speed, the persons to be of low viscosity oil, in order to reduce friction loss; 3, high working temperature, choose the high viscosity of the oil, because of the viscosity with temperature rise will be reduced. The performance of the grease choice: penetration - — Characterization of thin grease consistency, similar to the oil viscosity; Drop point - — The performance of the characterization of high temperature grease. The selection principles of the grease: 1, the working environment of moisture, choose calcium base grease; 2, high working temperature, choose sodium base grease; 3, with water vapor and high working temperature, the persons to be lithium grease. Solid lubricant: to prevent and protect from damage during friction surfaces in relative motion, and reduce the friction and wear and use powder or thin film on the surface of solid is called a solid lubricant. The use of solid lubricant wide temperature range and good bearing capacity is strong, prevent stick-slip, high vacuum resistance, radiation resistance, wide range of electrical conductivity, anti-corrosive, dustproof, therefore is a kind of special type of grease. Its disadvantage is that the friction coefficient is generally larger than lubricating grease, energy loss is bigger; Can't cooling effect; The membrane process complex, etc.