home » news center
» »
the article citations: time:2014-12-26 08:46:22
in order to ensure consistent high practical, the result of the shaft and the surface roughness of the hole and match the should be as small as possible, make these measurements, should be in cylindrical bearing hole, shaft and bearing hole of the corresponding surface, each side of the nearby assembly chamfering, shows that the two tags, so the direction of maximum deviation in actual assembly, so that both the maximum deviation of the match in the same direction deviation, make after assembly, can be partly offset by both parties.
(1) the bearing raceway groove sound sound and its control method is when bearing is running, 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 of deep groove ball bearing raceway is combined with other sounds. ball 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 , 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.
method to control the sound of raceway are: choose low noise bearing waviness namely small deep groove ball bearings, carefully select and use conditions. race often affect the mechanical noise, reduce the raceway can reduce the mechanical noise.
(2) the impact of the rolling element and its control method for larger models of or 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, materials for use with reasonable structure and flexibility of the bearing cage.
(3) the roll of the bearing 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 performance degradation occurred more often in grease base oil, 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, when necessary, can choose this kind of deep groove ball bearings, or decrease the radial clearance, the use of high performance grease and improve to suit the bearing parts of rigidity.
