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the article citations: time:2014-12-16 10:54:14
vibration damage to can be said to be sensitive to match, peeling, indentation, rust, crack and wear will be reflected in the ina roller bearing vibration measurement. therefore, through the use of special bearing vibration zhangs gauge can measure the size of the vibration, through frequency distribution can be concluded that the abnormal situation. the use of the measured values for ina roller bearing premise or sensor installation position and different, so need to prior to each machine measurement values determined after analysis and comparison test scale.
the influence of temperature on the g, using high temperature often said bearing is in abnormal situation. high temperature is also harmful to ina roller bearing lubricant. sometimes bearing overheating attributable to bearing lubricant. if the bearing temperature for a long time even the transfer of more than 125 ℃ lower bearing life. causes of high temperature bearing are: insufficient lubrication or excessive lubrication, lubricants contains impurities, heavy load, ina roller bearing wear, clearance, high friction and oil seal and so on.
so the continuity monitoring temperature is necessary, whether measured bearing itself or other important parts. if it is on the basis of the operating conditions, the temperature change of any fault has occurred.
sweden's raceway and its control method raceway is when bearing is running, the moving body move on the surface of the raceway and send out the voice of a line of continuous, happened all move bearing characteristic of the basic sound. general is equal to the raceway bearing voice and other sound. 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 bearings, 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 will follow the decrease of radial clearance and main frequency increased dramatically. control of raceway acoustic methods are: using low noise bearing is bearing waviness is very small, that is, carefully choose to use the premise. race often affect the mechanical noise, reduce the raceway can reduce the mechanical noise.
of rolling mill and its control method roll is can occur on all occasions sharp metal friction sound when most needed is least heeded, mostly happens in large type bearing grease lubrication, and function in the base oil 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 of big occasions occur easily, and with different size, easily happen in a certain speed range, both continuous and intermittent flush. external ring raceway take special processing method can prevent roll ring flush, can choose this kind of bearing, if necessary or appropriate to reduce bearing radial clearance, good use function of grease and progress to suit the bearing parts of rigidity.
