ntn bearing speed Determinants and management of oil lubrication

1: ntn bearing speed decision factors:
When ntn bearing load conditions in the 0.1C running, as the rolling element and raceway contact surfaces increases the contact stress to the heart, has led to ntn bearing operating temperature increased, the performance of the lubricant reduces. Therefore, the speed limit imports of bearings will be reduced accordingly. In this case, the only way to improve the speed increase is the appropriate clearance or import new bearing solutions.
To bear the role of joint load bearing ntn to the heart, to bear the load due to its increased number of rolling, frictional resistance increased, increased heat, lubrication and cooling conditions deteriorated, and the force acting on the cage is also increasing, therefore, must be based on bearing type and size of load angle, the bearing speed limit multiplied by a factor f2 be adjusted lower. For C / = 10 range, due to lower speed limit is very small, almost negligible, ie f1 = 1 value.
2:ntn bearing oil lubrication management:
1. At a reasonable premise fuel tank capacity, fuel tank and reasonable to keep the oil level, often to fill the oil tank to the oil tank is always in a reasonable run the oil level on oil degassing, precipitation machine Miscellaneous, separation of water and lower box oil temperature beneficial.
2. Lubrication Management is a professional technology management, should be set dedicated lubrication management, development management system, lubrication, lubrication training of technical knowledge.
3. Analysis and comparison of records of each inspection, lubrication of the bad state of forecasting, improve or hedge to work out. The system oil level, oil, oil temperature, oil pressure control alarm and interlock to secure, to prevent the occurrence of lubrication.
4. Prevention of Contamination and control of oil pollution:
(1) storage and transportation and storage, we should strictly ensure clean and closed containers to prevent dust, impurities, water intrusion. Should be in dark, cool and airy, with room for storage warehouse fire channel. Temporary open storage should be tilted slightly so that removable tops to keep the location of the state, to prevent rain intrusion. Do not oil and copper, and lead the promotion of oxidation of metal contacts.
(2) lubricant acceptance retesting major projects: viscosity, viscosity index, water content, resistance to emulsification, extreme pressure. Cleaning requirements within mechanical impurities of 0.01%, no traces of such water and sediment.
(3) oil purchase, storage, storage, issue and deal with waste oil should be a strict management system, according to different varieties, grades respectively, with clear easy to distinguish the signs or signs indicating the name, grade, date, etc. . Non-mixed deposits, to prevent the misuse of an accident caused by contaminated product.
5. Timing, positioning run CPC samples collected from the oil smell, color, viscosity changes, water content, water distribution performance, pollutant type and concentration, anti-foam properties are measured by tests. Lubricating oil into the point of more than 0.1% moisture content, the mechanical wear increased dramatically; more than 0.5% of the lubrication situation will be very dangerous. Well test record.