The service life of roller bearing vibration improvement

To effectively track understand YZ14 the reliability of the roller, we in chengdu area market YZ14 roller follow, to conduct a comprehensive record collection analysis inspection reliability index, in order to reflect the product reliability, for the product technical appraisal and perfect provide basis for further improvement. In track YZ14 vibratory roller, a roller in the working time of 300 h after the different sound of screaming vibrating wheel, there is a roller in the user after continuous operation for more than 8 h vibration occurs vibration phenomenon of bearing temperature rise is too high, can't reach thermal equilibrium state, at the same time accompanied by vibration frequency drop phenomenon. After the disintegration of two roller wheel vibration analysis and study, found that the vibration of the bearing inner ring on one side of the eccentric block and a half circle rolling path appear fatigue spalling, pitting, bearing vibration have failed. To this end, we put up in vibration bearing life, avoid vibration bearing premature failure as a technology subject to study. One, the introduction of working principle of the vibratory roller vibration wheel by vibration motor with r / 1800 mm high speed rotating shaft vibration, make the installed on the shaft vibration of eccentric block produces centrifugal force, the large centrifugal force makes the vibration wheel produce strong vibration compaction of subgrade and pavement, the structure and principles of vibratory wheel are shown in figure 1. At the ends of the wheel vibration suspension by rubber damping blocks connected with front frame around, can relatively suspension vibration round free rotation. Wheel vibration plate with two oil Chambers of A, with A belt around the eccentric block vibration shaft bearing on bearing vibration, vibration around shaft connected by the intermediate shaft, oil cavity around the two eccentric blocks in the same phase. Right shaft vibration by connecting to the outer end of the set of connected to the vibration motor, driven by the motor shaft vibration for high-speed rotation, vibration. The eccentric block vibration wheel rotates stirring oil cavity in the lubricating oil, the formation of splash lubrication, which have the effect of vibration bearing lubrication and cooling. ( img] 200906/20090610101508. gif[ /img] Compared with the generally used in mechanical transmission bearing, roller bearing vibration of the work is very bad, it needs to be produced by eccentric block under the wheel weight composite under the action of centrifugal force and vibration have been hit by, and that the load is usually at about 30 hz alternating frequency. Bearing sealed in vibration cavity, splash lubrication, lubrication and cooling condition is limited. As a result, the vibration of the bearing used in vibrating roller must have the limit of high load capacity and higher speed. If the vibration of bearing assembly, oil properties, cleanliness, bearing structure parameters, such as improper design choices, often lead to premature bearing failure, especially the bearing temperature rise sharply, causing damage or death, maintains a fracture, roller and ring crush phenomenon, the serious influence the reliability of the whole machine. Second, the vibration analysis of the causes of premature bearing failure through research and analysis, causing vibration road roller bearing, the main reasons for the premature failure has the following aspects: (1) selection of the bearing vibration and structural parameter improper choice of bearing is based on its function and the bearing is rehearsed the working condition matching, vibration of the bearing should be the limit of high load capacity and higher speed. Roller in the steering, bumpy road, when the compaction, bearing should not only