IKO plastic bearing maintenance repair the damage

1, the fatigue spalling fatigue spalling is bearing working surface scaly caused by rolling fatigue spalling. Bearing, roller and inner circle ( Or outer ring) By load is not constant, but changing as the bearing running again. The load for the alternating load; And because of roller and inner circle ( Or outer ring) Contact area is small, makes the contact stress is very big, under the high speed, in great alternating contact stress under the action of repeated many times, metal fatigue will occur. , visible tiny cracks in the area of stress concentration, due to the effect of lubricating oil and the corrosion of the metal, make the crack expanding gradually, when expanded to a certain degree, the surface metal flake will produce, form small pit, similar pitting, we in overhauling plastic IKO bearings, often found in or outer ring and roller surface pitting and flake pieces of metal, this is the phenomenon of metal fatigue spalling. Bearing fatigue spalling if the bearing occurs after long time operation, shall be deemed to be the natural damage, if, at the early stage of the bearing the use of the medium-term or shall be deemed to be the natural flake, then, should find out the reason of spalling. 2, not natural flake natural flake is caused by human factors in bearing using the spalling of middle or early. That unnatural flaking due to bearing type was the main cause of poor choices or due to improper installation, etc. ( 1) Due to improper bearing type selection of peeling off in a large axial load under the condition of using deep groove ball bearing, may occur early spalling. Spalling occurs mainly in the race, it makes the roller rolling path to put the ball mouth direction, even rolled ball mouth, finally make serious peeling raceway damage. Prevention measures of the damage is according to the plastic bearings working conditions reasonably select bearings. ( 2) Due to improper installation of the peeling off 1) When installation, shaft and the shell of shoulder to cooperate surface vertical, or due to the shaft bending, inside and outside the circle from skew to each other, will cause the rolling surface contact stress is too large, lead to spalling. 2) The outer ring is installed in the elliptic or conical seat hole. When rolling body through irregular roll, can increase the contact stress, leading to early spalling of raceway and rolling element. 3) Cylindrical roller bearing at installation time, as a result of installing a skewed and knock hard too ambassador in bearings or their suffering from injury. 4) When the deep groove ball bearings on the shaft interference when installation, if the pressure was passed by the outer ring and ball, will inevitably cause pits in the raceway touches the ball. The source of these pits is peeling, developing rapidly, will soon make the bearing damaged. Therefore, within the interference with the installation, or outer, applying pressure can only be installed on inner or outer ends. 5) In addition, IKO bearing installed too tight, too loose or improper adjustment, can also cause bearing early spalling. 3, wear bearing work, main movement between roller and raceway is rolling, sliding rarely. Therefore, under normal circumstances, the bearing parts wear and tear is not serious. But when the intrusion or poor lubrication, wear will accelerate rapidly. ( I） Intrusion mixed impurity particles in the lubricating oil ( Sand, dirt, etc. ) Invasion of bearing, will occur on the raceway and rolling body abrasive wear. In this case, can't see the metal flake, only