After the forklift bearing device is completed, in order to check whether the device is correct, stop the operation check. The small machine can be rotated by hand to confirm that it can rotate smoothly. The inspection items have poor operation due to foreign matter, scratches, and indentations. Due to poor equipment, the torque generated by the device seat is unstable, and the torque caused by excessive clearance, device error, and sealing friction is too large. Wait. If there is no abnormality, the power can be started.
Large machinery cannot be rotated manually, so the power is cut off immediately after the start of the no-load, and the machine is idling, checking for vibration, noise, contact with rotating parts, etc., and confirming that there is no abnormality, the power is turned on.
The rotation of the bearing is checked with a stethoscope, etc., and there are strong metal noise, abnormal sounds, irregular sounds, etc. to clarify the abnormality. The reason is that the smoothness is poor, the accuracy of the shaft or the bearing housing is poor, the FAG bearing is damaged, and the foreign matter is invaded.
Medium and large ball bearings, when the grease is smooth, especially in the winter, low temperature and other environmental conditions, there will be problems with the rolling sound. Ordinary, even if the rolling sound is attacked, the temperature of the bearing will not rise, and it will not affect the fatigue life, smooth grease life, and can be used normally.
Forklift bearing temperature can be measured according to the external temperature of the bearing housing. However, the application of the oil hole directly measures the temperature of the outer ring of the bearing more accurately. The bearing temperature is gradually increased from the beginning of the operation, and the temperature is usually stable after 1 to 2 hours. If the forklift bearing device is defective, the temperature will rise sharply and it will be abnormally high temperature. The reasons are such as excessive smoothing agent, too small FAG bearing clearance, poor installation, excessive sealing and installation friction. The reason for the high-speed rotation, the bearing structure, and the selection of the smooth method are also the reasons.
The grease lubrication method has the characteristics of simple and easy operation, convenient roll replacement, and wide application. The appropriate grease should be selected according to the working temperature, rotation speed, rolling force, sealing waterproof performance, impact vibration size, and grease supply method of the rolling mill bearing. Greases of regular manufacturers with high temperature resistance, high viscosity, excellent extreme pressure performance and high water repellency resistance should be selected. According to the working characteristics of the rolling mill bearing, 2#, 3#, lithium base grease or polyurea containing EP additive should be selected.
Although the high-performance grease purchase cost is high, but the amount is small, the forklift bearing has a long service life, and the total comprehensive cost is reduced. In addition, the filling amount of the grease must be in an appropriate amount and filled in place. The grease of different grades cannot be mixed, so that the working surface of the bearing of the rolling mill is always in the normal state of the oil film.
Fill the inner space of the FAG bearing when filling the grease for the first time. For the vertical roller or the inclined roller, fill the upper and lower covers of each bearing seat with a sufficient amount of grease. After each roll change, check whether the grease is hardened and blackened, contaminated with impurities, and oxidized and emulsified. If the above situation occurs, the grease should be completely replaced and the seal and sealing structure should be replaced or improved in time; if the situation is still good, the new grease can be added and continue to be used.
Oil and gas lubrication is the ideal lubrication method for bearings. During the working period, the compressed air enters the bearing with lubricating oil at intervals. The lubricating oil is left inside the forklift bearing. The air takes away the heat in the running of the bearing and blocks the external Impurity water vapor is immersed inside the FAG bearing. The oil is not atomized and does not pollute the environment.
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