- Deep groove ball bearings
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| Side drive wheel and roller vibration damage cause analysis and processing methods | |||
| 点击数：5793 日期：2014/4/4 | |||
| According to the external quality feedback, "J" series of vibratory bearing burned, the inner bearing seat seal leakage, side transmission teeth, broken shaft damage phenomena have occurred, three packs of services with high cost, the factory to the two items included in the main quality research program, to study. Now I understand as follows: A burning bearing, vibration, the inner bearing seat seal leakage, dish plate tear The causes of the problems there are the following several points: 1, vibration and bearing selection right. 2, the oil leakage caused by vibration, bearing lubrication is not sufficient. The machining error round 3, vibration is too large. 4, the unreasonable structure of the vibration wheel. 5, vibration of the bearing itself quality is not high. Analysis of the causes of: 1 vibration bearing selection right. The vibration of the bearing selection of bearing capacity, the speed limit, clearance, life parameters such as not up to the requirements. 2 oil leakage. The reason for this phenomenon is the eccentric shaft assembly performance is not good. The assembly often feel, easy to cause the skeleton oil seal lip seal back, don't play the role of sealing, resulting in leakage. Two is the skeleton oil seal of quality problems, caused by oil spills. Vibration bearing in high impact, high load, high speed operation, lubrication is not good, is caused extremely easily. Ding Qing skeleton oil seal and rubber as the raw material of high temperature resistance, impact resistance, does not meet the conditions of the large tonnage roller. The machining error 3 round of excessive vibration. Vibration wheel without aging treatment after welding, welding without releasing the stress to be processed, resulting in the mounting hole inner and outer bearing seat coaxial seriously poor. 4 vibration wheel structure is not reasonable. Dish plate structure for the cantilever beam structure, the design stiffness is the lack of congenital defects, so the stress, deformation is too large, the stress of the bearing is not uniform. 5 bearing its own quality. Bearing is a very strict requirements, high precision parts, the requirements of the material, special heat treatment process, and the radial clearance arrangements have decided its dependability. Solution: Carrying capacity of the 1 Accounting bearing, bearing the appropriate selection of vibration. 2 from the structure to completely control the oil leakage phenomenon occurs. One is the structure transformation of the existing wheel, a dish plate into the barrel type structure, the vibration chamber two independent Become, cantilever beam structure of dish plate into the double pivot beam structure, greatly improving the whole wheel stiffness, the stress caused by welding adversely effect of mechanical deformation caused by. The two is cancelled within the framework oil seal, oil two excitation chamber can be in circulation, which thoroughly solves the vibration wheel internal leakage problem. It also solves a series of problems due to lack of oil caused by the (negative effect for large amount of oil). The three is to control the welding quality, welding surface without leakage. Four is to strengthen the control wheel machining accuracy. 3 of the welding wheel for aging treatment, to eliminate welding caused by stress concentration, reduce the amount of deformation. Aging method can use natural aging (a longer cycle, the method occupies larger funds, factories are generally not used), also can use the artificial aging, so need to acquire a large heat treatment equipment, the factory is not a small investment. Various technical parameters of 4 from the technical documents strictly regulate the bearing, strict control of bearing supporting manufacturers, the vibration of the bearing examination and verification, and a kind of detection method to control. Two, the "J" series of large tonnage vibratory roller side transmission damage The analysis of the existing problems were as follows: 1, the transmission shaft strength is not enough, without modulation processing. 2, the structure is inadequate, the fillet two diameter is too small, the stress is concentrated in reducing root. A double gear strength 3, side transmission problems, teeth gear broken after falling into the tooth groove engagement, cut off the transmission shaft. 4, the side transmission gear machining error, especially the profile tolerance seriously poor, the shear stress under alternating drive shaft, drive shaft for fatigue and fracture. Solution: 1, improve the transmission shaft strength, from the untreated material into modulation processing, the strength is increased. 2, the bold drive shaft, from the original 80 to 90, the proportion of small diameter, and diameter increased fillet, reducing the stress concentration. 3, widening side tooth width, increase the strength of the transmission side. The above two kinds of feedback quality problem exists, the improved effect is obvious, practice has proved that the improved method is correct. |
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