Cylindrical roller bearings functioning normally
|
| Time：2016.09.13 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
|
Power running, start from no-load low speed, slowly progress to a predetermined nominal operating conditions. Commissioning check matters is, whether there is abnormal sound, cylindrical roller bearing temperature changes, smoothing agents or discoloration of the leak and so on. If abnormal, should immediately suspend the operation, inspection machinery, if necessary, to remove the bearing inspection.
After INA bearing device is completed, in order to check whether the correct means to stop the operation check. Small machinery can rotate by hand, in order to confirm whether rotate smoothly. Check the project due to dysfunctional nick, indentation formed, unstable moment due to poor equipment, poor processing unit housing generated due to clearance is too small, the device error, caused by seal friction torque is too large, etc. Wait. Without exception it is possible to start the power running.
Large machinery can not be manually rotated, so cut off power immediately after the load starting, idle machinery, check for vibration, noise, etc. rotary member can contact to confirm no abnormality into power running.
Rotating bearing tone with a stethoscope and other tests, there is a strong metal noise, different sound, and other irregular sounds clarify abnormalities. Its cause adverse smooth shaft or bearing bad precision cylindrical roller bearing damage, foreign invasion and so on.
Under medium and large ball bearings, when fat is smooth, especially in winter, low temperature and other environmental conditions, problems will grind rolling sound. Ordinary, even tone onset grinding mill, the bearing temperature does not rise, does not affect the fatigue life, smooth grease life, can be used normally.
INA bearing temperature, it can be based on common bearing external temperature speculation. But the hole temperature applications directly measure the bearing outer ring even more precise. Bearing temperature gradually increases from the beginning of the operation, the temperature stability is usually 1 to 2 hours. If bad INA bearing device, the temperature will soar, showing an abnormally high temperature. Its origins, such as excessive smoothing agent, a cylindrical roller bearing clearance is too small, poor equipment, installed seal friction and too big. High-speed rotation of the place, bearing structure, smooth way of choosing the wrong and so is its reason.
Grease lubrication method is simple and easy to change the characteristics of the roll, which is widely used. It should be based on the rolling mill bearing operating temperature, speed, rolling force and sealing waterproof, shock and vibration size, etc. The method for selecting a suitable grease grease. To choose temperature, viscosity, good extreme pressure properties and high resistance to water washout performance of regular factory grease. According to the working characteristics of rolling bearings should be selected containing EP additives 2 # 3 # lithium grease or polyurea grease.
Although high-performance grease procurement costs are high, but with less, and long bearing life INA, the total overall cost is reduced. Also filling amount of grease must be appropriate and fill in place, can not mix different brands of grease, so that the rolling mill oil film bearing surface is always in the normal state.
The first time the cylindrical roller bearing grease filled interior space can be filled for each vertical roll chocks or roll up and down the ramp to fill cover a sufficient amount of grease. After each roll change to check whether the grease hardened black, whether impurity contamination, whether oxidizing emulsion. If the above situation should be completely replace the grease and check the seals and seal structure be replaced or improved; continue to use if the situation is still good to add new fat.
Is the ideal oil lubrication bearing lubrication, bearing them at work from time to time with compressed air drops of lubricating oil into the interior of the bearing, lubricating oil left in the INA bearings inside the air bearing running heat away, while preventing external impurity vapor immersion cylindrical roller bearings inside. Oil is not atomized does not pollute the environment.
|
|
