The ultimate speed detecting EDAbearing

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The limit speed of the bearing is the frictional heating does not cause burns and continuous rotation of the boundary values. SKF bearing limit speed by SKF bearing type, size, precision, lubrication, the oil gap, various influence factors of load and so on, but the most important thing is the lubricant and the influence of environment temperature. Rotating at high speed, especially the speed of approaching or exceeding the speed limit size table records, should pay attention to the following matters:
(1) the use of high precision SKF bearing;
(2) on SKF bearing internal clearance add analysis, SKF bearing internal clearance considering temperature rise reduction;
(3) analysis of lubrication. Using suitable for lubrication of high speed rotating, spray lubrication, oil mist lubrication and oil air lubrication, lubrication.
(4) the analysis material of cage type. For high-speed rotation, suitable for copper alloy or phenolic resin cutting holder. There is also suitable for synthetic resin forming high-speed rotating cage;
For small machinery, can be rotated by hand to confirm whether the rotation is smooth. Inspection items include:
1, there is no because the foreign bodies, scars, indentation and cause sluggish operation;
2, there is no due to poor installation, mounting process arising out of the bad moment instability;
3, there is no caused by clearance is too small, installation error, the friction force is too large and so on.
If there are no more no abnormal phenomena, can begin power operation.
However, for large machinery can not be manually rotated. So the no-load starting immediately after power cut, mechanical idling, check whether the vibration, noise, rotating parts are in contact and so on, confirmed no abnormal, into the dynamic operation.
Power operation is from the no-load speed, slowly increased to the rated operating condition. Test run of issues: whether there is abnormal sound, SKF bearing temperature, lubricant leakage or discoloration etc.. If abnormal, should immediately suspend the operation, inspection machinery, to remove the SKF bearings checked when necessary.
SKF bearing temperature check. Usually according to the external temperature of the bearing seat to speculate. However, direct measurement of SKF bearing ring using oil hole temperature more accurately. SKF bearing temperature rises gradually from running, usually 1~2 hours after the temperature stability.
If the SKF bearing installation is bad, the temperature will rise sharply, abnormal high temperature. The reason such as excessive lubricant, SKF bearing clearance is too small, poor installation, sealing device too much friction. High speed rotating occasions, SKF bearings, lubrication mode choice is also the cause of the error.
SKF bearing sound check. The rotating tone with a stethoscope to check, such as a metallic noise, strong noise, such as abnormal sound that irregular. The noise due to poor lubrication, axis or SKF bearing bad precision, bearing damage, foreign intrusion etc..

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