Analyzing the import wheel bearing load failure common problems countermeasures

Imported bearing a rotation, inner ring and outer ring raceway surface, with rolling body is rolling contact, as the dark side, thus orbit trajectory are attached to the raceway surface does not belong to abnormal, which can be learned that load conditions, so at the time of removal of timken bearings, please keep close attention and observation on the surface of the raceway. If you look closely at orbit, will know that only bear radial load, bear the axial load of big, inherit the torque load, or extreme rigid in bearing box is not equal. Can check if the wheel bearing with unexpected load and installation error is too big, etc. , shall be investigated and be hold clues to the cause of bearing damage. Lubrication is very important, not only for bearing, also for all of the bearing. But please note that the bearing should not add too much grease. And then replace the imported bearing lubricant. Used engine oil lubrication of timken bearings after xie used engine oil, if possible, shall be impregnated with fresh oil and let the machine in low speed rotation for a few minutes. As far as possible make the oil collecting residual pollutants, and then purging in addition to the oil. And the use of grease lubrication bearing in replacing grease, Joe used in addition to the device should be avoided with any part of the cotton material come into contact with the bearing. Because these residues fiber may wedged in between the scroll and damage, especially the application of small bearing more need to pay attention to this problem. A, use when installation should careful not allowed powerful punch, are not allowed to use hammer percussion bearing directly, not allowed by transfer roller pressure. 2, using appropriate and accurate installation tools use a special tool, as far as possible to avoid use cloth class and short fiber, things like that. Third, try to keep the bearing and the surrounding environment clean dust into the bearing even invisible to the naked eye smile, also will increase the wear and tear of imported bearings, vibration and noise. Four, to prevent rusting of the bearings directly with the hand take wheel bearings, to fully wash hands sweat, and again after coated with high quality mineral oils, especially in the rainy season and summer to pay attention to rust. In some special operating conditions, bearing can get more than the life of the traditional computing, especially in the case of light load. These special operating conditions is, when the rolling surface ( Track and rolling piece) Can be separated by a lubricating oil film effectively and the surface of the limit of pollutants may cause damage. In fact, under ideal conditions, the so-called permanent it is possible to check the bearing, the bearing life don't let bearing exposure to pollutants or moisture environment. If the job is interrupted, should with oil film, paper or similar material by machine. If don't have to remove and may perform inspection of cleaning without masking timken bearings, to clean with brush with petroleum solvent coating, then dry with a lint-free cloth or with compressed air to blow dry, Be careful not to let the bearing component starting rotation) 。 With a little mirror, and the probe used in the similar to the dentist to check the bearing of the orbit plane, retainer and beads. Do not clean the encrypted block or dust bearing; You just wipe the outer surface. If the bearing is need to replace damaged situation. Replace the imported bearing in regular maintenance downtime period than the array bearing damage of selected into a sudden stop loss is much more economical. Contact fatigue failure refers to the bearing working surface under the role of alternating stress and failure. Contact fatigue spalling occurred in bearing working surface, often accompanied by fatigue crack, first of all, from the maximum cyclic shear stress under contact surface, and then extended to form a different flake shape, such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking. Refers to the relative sliding friction between the surface abrasion failure lead to constant wear and tear of the working surface of the metal and the failure. Continuous wear will cause wheel bearing parts damaged gradually, and ultimately result in the loss bearing dimensional accuracy and other related issues. Wear may affect the shape change, the increase of fit clearance and working surface morphology change, may affect the lubricant or make its pollution to a certain degree of lubrication function is lost, so that loss of timken bearing rotating accuracy and will not operate properly. Wear failure is one of the common failure modes of all kinds of imported bearings, according to the wear and tear is usually divided into one of the most common form of abrasive wear and adhesive wear.