One
of the characteristics of the electric spindle is the high running
speed. The good lubrication of the bearing is an important indicator to
ensure its normal operation. Therefore, it is important to provide a suitable electric spindle lubrication system. The
factor that affects the running accuracy of the electric spindle
related to lubrication is the heating of the electric spindle. The internal heat source of the spindle comes from two sources: 1, the spindle bearing heat; 2, the electric spindle built-in motor heat. Solving
motor heat needs to cool the stator of the motor, and it can be
achieved by the circulating water cooling method to take away the heat
of the motor. To solve the spindle bearing heat problem, the heat
generated by the operation of the bearing must be taken away in time. Traditional
thin oil lubrication is the delivery of a large amount of lubricant to
achieve intrusive lubrication. At the same time, the lubricant removes
heat. This
lubrication method has its disadvantages. First, it wastes a lot of
lubricating oil. Second, the lubricating oil in the cycle of lubricant
molecules and friction between the pipes generate a lot of circulating
heat, resulting in oil temperature rise, the lubricant at this time Not only can not play a good cooling effect, but also lead to bearing
temperature increases, is not conducive to the performance of the
spindle bearing performance. Therefore,
eliminating the generation of frictional heat between molecules inside
the liquid becomes the key to solving the problem. Practice shows that oil and gas lubrication can fundamentally avoid this situation. First, oil and gas lubrication provides a small amount of lubricant to meet the amount of lubricant needed for the bearing. Secondly,
oil and gas lubrication will not generate friction due to lubricant
molecules, and the clean compressed air will take away the heat
generated by the bearing and keep the spindle running at a stable
temperature. This can effectively solve the problem of thermal deformation caused by temperature increase. Electric spindle oil lubrication has the following advantages: 1. A positive pressure environment can be obtained in the spindle
bearing chamber to prevent the intrusion of external impurities. 2, compressed air can play a good cooling effect on the bearing. 3, 1-8 points of independent lubrication points, reliable monitoring of each lubrication point to the oil situation. 4. The consumption of lubricating oil is controlled by precise metering, so the consumption is very low. 5, modular structure, according to the number of lubrication points
increase or decrease the module components, to achieve multi-point
combination; 6, full electronic program control, quick setting through a convenient man-machine interface; 7, the use of oil and gas lubrication equipment is simple to use, low maintenance costs.
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