SKF bearing performance impact on life

Rolling bearing clearance is an important index, directly affect the use of SKF bearing performance, according to the using condition of the bearing, choosing the appropriate clearance, has the very vital significance. When choosing the bearing clearance, should give full consideration to the following factors: 1, bearing and shaft and the shell hole with elastic will lead to the change of the bearing clearance value. General bearing clearance value after installation will narrow; 2, bearing in the process of operation, as a result of the shaft and the shell cooling condition is different, produce temperature difference between inner ring and outer ring, and can also lead to bearing clearance value. 3, the shaft and the shell material because of the different expansion coefficient, clearance value will reduce or increase. Namely rolling bearing in the bearing box mounted on shafts or not, will it a fixed housing, then the party has not been fixed do radial or axial movement of the mobile. According to the moving direction, can be divided into radial clearance and axial clearance. Clearance (in the operation of Called work clearance) About the size of the rolling, the fatigue life of rolling bearing, the temperature rise, noise, vibration and so on have an impact on performance. Measurement of bearing clearance, to obtain stable measurements, general rules to SKF bearing load measurement. Therefore, the resulting measured values than real clearance ( Called the theory of clearance) Big, that is, to increase the measuring load produced by the elastic deformation. But for rolling bearing in the roller bearing, due to the elastic deformation is small, can be neglected. Before the installation of bearing internal clearance is generally expressed in the theory of clearance. Often appear question answer: when the rolling bearing clearance through the hours, fever is the most prone to the condition of the bearing, and if speed faster, it is possible to mana burn. And if no heed to continue for a long time under the environment of high temperature and high speed operation, there is likely to be the phenomenon of rolling bearing lock, and will produce to the rolling bearing supporting shaft bearing a strain damage or shell. Of course, if not limit operation case, rolling bearing is rarely the cause of lock phenomenon, even in the case of without oil lubrication, rolling bearing can also run a long time. So, you can see, when the rolling bearing clearance through the hours, do not careless. The correct operation and timely repair, can prolong the service life of rolling bearing. One should be kept level, general bearing, some heavier SKF bearing long upright, will be deformation due to its own weight! Selection stage, need to consider many factors, Example: load, hardness, running environment, etc. ) First of all, a good bearing design will make bearing reaches its maximum life span. Second, the correct storage, SKF bearing before installing the best shall be kept in their original packaging. Need to stay clean, no moisture, relatively constant temperature environment. Rolling bearing should stay away from dust, water and corrosive chemicals. Shaking and vibration may be forever on the mechanical properties of the damaged bearing, therefore in the process of processing and storage should avoid vibration. Also, coated with grease, Or sealed) Bearing need to be careful, because the grease will change after long time storage density. When the bearing is used for the first time, there will be a certain degree of rotation noise. So, this kind of bearing on time should be to control according to the principle of first in first out! Third, clean, it is very important for rolling bearing. The rotation of the bearing ring surface is very smooth, is sensitive to damage caused by pollutants. Impurity particles are influenced by the excessive rolling rolling element and partial pressure in the bearing, eventually lead to permanent material fatigue. Four, comprehensive equipment installation again, SKF bearing should use the right tool to install and remove cautiously, Can be dismantled reference bearing series video) 。 Should choose the right tools! Industry experts estimate that premature bearing failure, 16% were caused by incorrect installation. Generally a large number of installation, generally take appropriate bearing installation of equipment. But in the maintenance or replacement work, various environment! Recommend that the relevant drawings, maintenance manual, product manuals carefully have a look. Bearing components should also keep absolutely clean! Five, the careful installation and disassembly, once many times before when it comes to SKF bearing installation, simple to summarize again: 1. Don't impose on rolling element installed power, this could easily lead to the rolling element and contact area of local overload, leading to premature failure of bearing. 2. Do not use any hard tool ( Like a hammer, screwdriver, etc. , I have seen too many 'hard' with these two tools installed, too) Directly on the bearing surface, which can lead to bearing ring fault or broken. 3. General bearing not removed from the equipment, only larger bearings are removed for preventive maintenance. Disassembly process, first of all, you should use the right tools, make sure the adjacent components are not damaged! Six, right proper lubrication, lubricants can be isolated bearing surface, so as to reduce friction, protect the metal parts and prevent pollution and impurities. There are all kinds of grease which can be chosen by the different operating conditions.