Common failure of rolling bearings

          rolling bearing is a large number of mechanical parts, and the manufacturing accuracy requirements are very strict, technical specialization is high, the most common failure is a serious fever. If it is after the new clothes or cleaning the oil, just one run is rapidly warming, severe fever, and operation is not unusual sound or vibration, the reason may grease with too much, should add proper amount of grease can be.
& nbsp; & nbsp; & nbsp; & nbsp; & nbsp; in severe fever at the same time, as well as bearing & ldquo; locked & ldquo; phenomenon. The possible reason is a two axis bearing cover the top of the outer ring of the bearing too tight, no according to the provisions set aside enough axial clearance, operation of temperature enable caused by axial elongation, at this time should be adjusted appropriately. For tapered roller bearings, in particular, should be noted.

           ; individual case is the bearing inner ring and shaft with too tight, so that the inner ring expansion; or bearing block and bearing outer ring with too tight, so that the outer ring is deformed to produce crack. For the former, such as the size of the machine is too large to stay in the processing shaft, it is desirable to lower the bearing, grinding shaft neck to the proper assembly size, separate assembly. The latter is often occurred on the bearing seat, so that the bearing seat has become “ flexible &rdquo. Can be in the bearing seat on the open side of the one or two layers of paper pad, you can rule out fault. In addition, if there are dust particles, impurities with the grease into the rolling bearings, it is possible to appear “ &rdquo. Once, wash oil.

& nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; if the fever appeared in the rolling bearing has been functioning for a period of time after, with a metal rod contact listening and dry friction noise, or irregular crash may is short of oil, or not clean, or is damage the bearing rolling, shall be disassembled for cleaning, oil or the disassembly and replacement of the bearing.

            4 when the rolling bearing part which defects must be replaced with new
           . Bearing water outage damp or lakes, so that the surface of the rolling body raceway or appear rust corrosion.

           . When a hard object into the raceway, often in the raceway or the raceway surface discharge pit. Not only in the operation of noise or impact, too large pits will produce vibration and bearing severe fever.

           . Except for manufacturing reasons, if the shaft surplus size too large, the assembly method improper, burst and damage the bearing inner ring and the outer ring, and the thrust bearing dynamic pressure was broken.

            the rolling surface fatigue spalling. If used improperly, will make this kind of normal wear and tear rapid speed.

            the fracture of cage. Basically material and manufacturing problems. Sometimes, when you install the holder, it will cause too early fault.

            the rolling body rupture. In operation, there will be a large noise, and even shock, most of the material or heat treatment.

            the current corrosion. In the electric welding, if current passes through the bearing, the fever produces the spark, causes the roller body to burn. Therefore, in the electric welding must make the electric welding “ ground ” close to the point of welding, welding current can not be allowed to pass through the bearing.

           . Running in the severe fever, resulting in abnormal sound and vibration, because this time gap has increased. When the dust enters, the surface of the abrasion, the wear will be more accelerated.

           ; in addition, if the processing time with the wrong size, resulting in “ ” “ &rdquo. Bearings are easy to find out, because the bearing inner ring on the shaft “ loose ”; the outer circle is to carefully check the bearing outer ring or bearing inner race, in order to find traces of mutual sliding between them.

            only in the following cases, before considering bearing repair the problem, namely:

& nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (1) large factories used a lot of the same types of bearings, the failure mode is mainly rolling surface wear, fatigue and fretting wear, especially the damaged parts for cage or rolling body, and ring or washer is still worth repairing; < br / >
& nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (2) large and extra large type bearing, reaching to the very verge of failure or although has expired and there are no major damage parts, or precious bearing must be managed to extend its effective use; < br / >