Small lubrication knowledge - — The oil film bearing oil - bearing knowledge

Oil film bearing is the use of fluid dynamic pressure lubrication theory, namely the axis and the relative motion of the bearing components, with the help of the lubricating oil viscosity and oil in the bearing vice wedge gap formation fluid dynamic pressure effect, and the formation of a bearing oil film bearing. Typical application: warmwalzwerk roll bearing oil film. Thus can satisfy the bearing pressure at maximum range, impact resistance, change speed and the precision of rolling and the service life of the structure size and requirements. According to incomplete statistics, the status quo of the domestic tonier parts of oil film bearing friction losses more than 80% are due to the oil film bearing oil or lubricating system failure or improper use, particularly with the solid particles of pollution in the lubricating oil, water and oil of metamorphism. At present, the domestic scientific research units and user units are trying to improve the oil film bearing seal structure, prevent water. But the water portion of the oil film bearing, especially of pure rolling mill oil film bearing, because it is a state of dynamic seal, and appeared in the process of rolling steel pile accident is easy to cause the loss of 0 type sealing ring seal performance, in the process of production is very difficult to prevent. Water into the oil film bearing oil, make certain additives hydrolysis and failure, and may become turbulent, destroy the normal operation of the fluid lubrication, cause abnormal wear and easy corrosion equipment, worsen oil emulsion and waterborne,, oxidation resistance and resistance to bubble. In addition, water and oil oxidation products and sludge generated in use, form colloidal oil mass, may block filtering facilities. Cooling water mixed with lubrication system, will bring serious damage to the production. Lubrication system usually moisture content shall not be higher than 0. Exceed 5%, water content, will lead to the oil viscosity is reduced, antiwear agent, antioxidant role in water and oil accelerate the deterioration of the oil, base oil degradation process speeds up, oil water performance, etc. Class contains free water and acid substances and degradation of lubricating oil circulate in the system, each element in the corrosion system, especially the corrosion of bearing parts, such as the bearing of susceptible to corrosion fatigue spalling, wear and agglutination failure; Aperture of the oil film bearing wear leads to its shape is irregular, destruction of oil wedge formation conditions, the final cause of corrosion, such as shaft, gear, bearing roller and bearing damage, more serious is that a system frame loss may lead to pollution, set up a chain reaction other frame. Data show that the main cause of mechanical failure or early wear, more than half of them are related to lubrication technology. Good lubrication management, prevent the bearings, gears of friction in the moving parts, such as scratches or sintering, prevent and reduce the wear and tear, reduce the friction resistance, prevent equipment accidents, improve equipment production efficiency; To save energy, improve energy effective utilization, increase the economic benefit, is the main task of the mill lubrication work. ( 1) Under the precondition of reasonable fuel tank capacity, maintain reasonable tank oil level, often to fill lube oil tank, the tank oil is always the reasonable operation of the oil level, the oil degassing, precipitation machine noise, separation of water and reduce the oil temperature in the cabinet are favorable. ( 2) Timing, positioning in the operation of the automatic detection sample from oil smell, color, viscosity change, performance, pollutant category and water content, water content, anti-foam performance testing laboratory, etc. Enter the lubricating points of water content in oil more than 0. Sharply increased 1%, the mechanical wear and tear; More than 0. 5% of lubrication and the status of the equipment will be very dangerous. ( 3) Automatic analysis comparison test record at a time, to forecast the bad lubrication condition, work out improvement or measures are avoided. On the system of the oil level, oil, oil temperature, oil pressure alarm and interlock control to safe and reliable, to put an end to lubrication accidents. ( 4) Control of oil pollution, low oil main projects: acceptance of the reinspection viscosity, viscosity index, water content, emulsification, extreme pressure resistance. Cleanliness requirements of mechanical impurities in 0. Within 01%, no traces of water and sediment and so on. Low at the top of the tank manhole cover plate should cover tightly, do not open. Set air filter filtration precision in more than 100 mesh, regular check clearing, a drain valve timing emissions at the bottom of the tank. The petrol tank fill lube oil application pipeline pump, and furnish the appropriate filtration precision filter. Precipitation sludge tank should be cleaned regularly, are not allowed to wipe the tank with fabric surface. Replacing blocked filter core, should be no oil filter cartridge memory, watch the dirt into the filter downstream piping, cause serious not second pollution, otherwise will directly endanger the normal lubrication lubrication points. Low according to in the shade of the oil, viscosity, water and pollution index changes, on time and qualified gas and oil change.