SKF spherical bearing noise limit speed emergency measures

SKF bearing failure for many reasons, in addition to the normal bearing fatigue spalling like failure caused by sealing, too close coordination with the factors such as poor lubrication bearing clearance or too small can traces of special failure and failure modes. In most of the time, so check the outer spherical bearing failure can be found that the cause of bearing failure, so as to take corresponding measures in time to prevent. In general bearing failure because a third bearing into the fatigue spalling period belongs to the normal failure; 1/3 one-third for bearing lubrication bad cause early failure because of pollutants into the outer spherical bearing or incorrect installation bearing failure in advance. In general is abnormal bearing has the following seven kinds of common symptoms: overheated bearings, bearing noise is too big, big bearing life is too low, vibration, short of machine performance requirements, bearing loose on the shaft, shaft rotation difficult. ( 1) Bearing raceway groove sound sound and its control method is when SKF bearing operation, the roller rolling on the surface of the raceway and a line of continuous sound, is unique to occur in all rolling bearings of the basic sound. General sound of outer spherical bearing raceway is combined with other sounds. Bearing raceway is irregular, frequency above 1000 hz, its main frequency does not change with speed, but its total sound pressure level increases with speed to speed up. Raceway large bearings, the rolling sound of sound pressure level decrease with the increase of the viscosity; The raceway small SKF bearing, the sound pressure level in the viscosity increases to about 20 was/s above, from decreased to increase somewhat. And the rigidity of the bearing, the greater the raceway of the lower the total sound pressure level. Such as radial clearance is too small, the total sound pressure level and race master frequency will increase sharply with the decrease of radial clearance. Control of raceway acoustic methods are: using low noise bearing is bearing waviness is very small, that is, carefully select and use conditions. Race often affect the mechanical noise, reduce the raceway can reduce the mechanical noise. ( 2) Impact of the rolling element and its control method for larger models of bearings or outer spherical bearing under pure radial load speed, due to centrifugal force is lesser, roller in the rolling body will impact the load area or race and making noises. But with the increase of rotational speed, the noise will disappear. Control method of rolling body impact sound: decrease the radial clearance, use with reasonable structure and material with kindliness SKF bearing cage. ( 3) Bearing of rolling mill and its control method is the roll bearing in the harsh metal can occur in all occasions, mostly happens in large type bearing grease lubrication, and in the base oil performance degradation occurred more often in grease, almost does not occur when oil lubrication. In addition, more easily occur during the winter, when under pure radial load, the radial clearance prone to big occasions, and with different size, easy to happen in a certain speed range, both continuous and intermittent. External ring raceway take special processing method can prevent the occurrence of roll ring, if necessary, can be used outside the spherical bearing, or decrease the bearing radial clearance, the use of high performance grease and improve to suit the bearing parts of rigidity.