Motorized spindle running speed is high, good lubrication of bearing is an important index to ensure its normal work. Therefore, it is very important to provide a suitable lubricating system for motorized spindle.

The lubrication related factor that affects the operation accuracy of motorized spindle is its heating. The internal heat source of motorized spindle comes from two sources:

1. Heating of spindle bearing;

2. Heating of the motor built into the spindle.

To solve the problem of motor heating, the stator of the motor needs to be cooled, which can be realized by circulating water cooling to take away the heat of the motor. To solve the problem of spindle bearing heating is to take away the heat generated by bearing operation in a timely manner. Conventional thin oil lubrication is the transfer of large amounts of lubricating oil to achieve intrusive lubrication, at the same time, the lubricating oil carries away the heat.

Such shortcomings of lubrication way, one is a waste of a lot of lubricating oil, the second is between lubricant oil molecules in the process of circulation and with plenty of loop heat generated in the friction between pipeline, lead to the oil temperature rise, at this time of lubricating oil not only can not play a good cooling effect, but also can lead to bearing temperature rise, is not conducive to the main shaft bearing performance of the play. Therefore, eliminating the heat of friction between molecules in liquid becomes the key to solve the problem. Practice shows that oil and gas lubrication can avoid the occurrence of this situation fundamentally. First of all, oil and gas lubrication to provide a small amount of lubricating oil to meet the required amount of lubricating oil bearing. Secondly, there will be no heat generated by molecular friction of lubricating oil in oil-gas lubrication, while clean compressed air will carry away the heat generated by the bearing, keeping the spindle running at a stable temperature. This can effectively solve the problem of thermal