IKO thrust ball bearing used in heat treatment

Give priority to, according to the standard of low noise bearing production. In the process of the use of thrust ball bearing, some machines have specific request for noise is required, such as standard according to the low noise: eight roller bearings, model from N309 type to N322 type; Three ball bearings, their inner diameter from phi 2. The type of 5 mm to phi 60 mm, and with Zl, Z2 and Z3 these three suffix. For this type of short single centripetal ball bearings and cylindrical roller bearing for the use of motor bearing, is defined. If other machine can also use this type of bearings, then consider this kind of bearing in the application of other machines will be the priority, because this kind of bearing the price is cheaper, if on the size and type can roughly be identical, try to use these two kinds of bearings. Through the above comparison, we in the process of IKO bearing of choose and buy, can be carried out in accordance with the specific situation analysis, according to have to satisfy the bearing classification using the principle of the classification, if not, are sorted by replace the bearing noise. If can be used in strict accordance with the above order bearing, so thrust ball bearing must be in the middle of the equipment is in order, run quietly. Phenomenon: 1) In general engine running stability and no sound, when the engine speed changes suddenly a depressing 'boring boring' tapping, at the same time accompanied by vibration phenomenon. 2) Change the engine load, and the noise. The higher the speed, the greater the noise. 3) Single cylinder 'fire' feel change, and in the adjacent two cylinder sound fire at the same time will be significantly weakened. Reasons: 1) Crank shaft and the shaft neck fit clearance is too large. 2) The crankshaft and the axial clearance is too large. 3) The crankshaft bearing cap is loose. 4) Crankshaft bearing and cause poor lubrication journal bearing alloy ablation falls off and ring. 5) Crankshaft bending deformation, the crankshaft journal circles. 6) The crankshaft bearing and bearing relative rotation. Diagnosis: 1) The noise from the lower cylinder body near the crankcase. Oil pressure decreases obviously. Engine in the condition of low and medium speed jitter throttle, a clear and depressing continuous beat accompanied by engine vibration phenomenon. 2) High speed engine, the body vibration is larger, a significant reduction in the oil pressure at the same time, for IKO bearing and the journal clearance is too large or bearing alloy ablation fall off. 3) Single cylinder fire test sound a little change, and the adjacent two cylinder break fire sound significantly diminished or disappeared, it is between the two cylinder crankshaft bearing ring. 4) Speed is not high but the body vibration is larger, a swing shaking phenomenon, at the same time issued a heavy and large 'boom boom' tapping is a fracture. 5) Increases with temperature rise and noise to the sound become cluttered, may be the crankshaft bending.