High-speed motor spindle adopting lubrication under loop

Abstract

The invention discloses a high-speed motor spindle adopting lubrication under a loop, which belongs to the technical field of motor spindles. The high-speed motor spindle comprises a spindle casing and a spindle arranged in the spindle casing, wherein bearings are sleeved at the two ends of the spindle respectively; the middle of the spindle is sleeved by a rotor; a stator corresponding to the rotor is arranged in the spindle casing; an oil mist pipe is arranged in spindle and provided with a plurality of nozzles corresponding to lubricating holes of the bearings; through holes are formed in the connecting parts of the spindle and the nozzles of the oil mist pipe; an oil mist inlet connected with the oil mist pipe is formed in the spindle casing; a cooling system is further arranged in the spindle casing of the high-speed motor spindle; and the oil lubrication under the loop or oil gas lubrication under the loop is adopted for the bearings. With the adoption of the lubrication under the loop for the high-speed motor spindle, lubricating oil or oil gas arrives at bearing lubrication areas more easily under the action of a centrifugal force, so that the lubrication effect is better than the effects of ordinary jet lubrication and oil gas lubrication.

Description

technical field [0001] The invention relates to an electric spindle, in particular to a high-speed electric spindle adopting under-ring lubrication. Background technique [0002] The high-speed spindle unit is the most critical part of the high-speed machining machine tool. The types of high-speed spindle units mainly include electric spindles, pneumatic spindles, and hydraulic spindles. The output power of different types varies greatly, and the spindle of a high-speed machining machine tool needs to achieve speed up and down in a very short time, and stop quickly and accurately at a specified position. This requires high angular deceleration and angular acceleration of the spindle. If it passes through intermediate links such as belts, it will not only slip at high speed, generate vibration and noise, but also increase the moment of inertia, which will cause great difficulties for the machine tool to stop quickly and accurately. At present, most high-speed machine tool ...

AI Technical Summary

Problems solved by technology

However, this lubrication method is difficult to operate. When implementing oil-air lubrication, it is generally required that each bearing has a separate oil-air nozzle, and there are strict requirements on the position of the bearing spray, otherwise it is difficult to guarantee the lubrication effect, and the effect of oil-air lubrication is not good. Affected by compressed air flow and oil-air pressure

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