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SKF bearing limit speed detection requirements
Source: Bearing network time: 2018-01-16
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.2) Analyze the internal clearance of SKF bearings; consider the number of internal clearance reductions of SKF bearings where temperature rise occurs,
.3) Analyze the smooth method. Select a smooth method suitable for high-speed rotation, such as smooth circulation, spray gliding, smooth oil mist and smooth oil and gas.
.4) Analyze the type of data of the cage. Regarding high-speed rotation; it is suitable to use copper alloy or phenolic resin to cut the cage. Others also have a synthetic resin molding cage suitable for high-speed rotation.
About small machines; can be rotated by hand to admit that it can spin smoothly. View items include:
1. Is there any work that is caused by foreign objects, scars, and indentations?
2. Whether there is any equipment failure; the torque generated by the equipment seat is not stable,
3. Whether there is excessive torque caused by too small clearance, equipment error, sealing conflict, etc.
If there is no abnormality above, then you can start the power work.
However, about large machinery can not be manually rotated. So immediately after the no-load start, the power is blocked; the machine is idling; check whether there is oscillation, noise, whether the rotating parts can touch, etc.; after acknowledging that there is no abnormality; enter the power work.
Power work is started from no-load low-speed; slowly progress to the extra work of the specified conditions. The items to be examined during the test are: can there be abnormal sound, SKF bearing temperature change, smoothing agent leakage or discoloration, etc. If found Abnormal; should work intermittently; view the machine; if necessary, remove the SKF bearing to view.
SKF bearing temperature view. Generally can be estimated according to the external temperature of the bearing housing. But the oil hole directly measures the temperature of the outer ring of the SKF bearing is more accurate. The temperature of the SKF bearing gradually increases from the beginning of the work; generally the temperature is stable after 1~2 hours.
If the SKF bearing equipment is defective; the temperature will rise sharply; the abnormal temperature will be abnormal. The reasons are such as excessive smoothing agent, too small clearance of SKF bearing, poor equipment, excessive conflict of sealing equipment, etc. High-speed rotation; SKF bearing layout, smooth The method of picking faults is also the reason.
SKF bearing sound view. Its transition sound is viewed with a stethoscope; if there is strong metal noise, abnormal sound, irregular sound, etc., the abnormality is presented. The reason for the noise is poor smoothness, poor accuracy of the shaft or SKF bearing seat, bearing damage, Foreign matter intrusion and so on.
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