A super high speed air bearing electric spindle

Abstract

The invention discloses a super speed air bearing electric main shaft which comprises an outer shell, a static pressure radial air bearing arranged in the outer shell, a rotor arranged in the static pressure radial air bearing, a motor shaft connected with the rotor, a motor rotor connected with the motor shaft, a back thrust bearing, a front thrust bearing, a thrust plate arranged at one end of the rotor, and a non-contact type air sealing ring arranged at one end of the motor shaft. The back thrust bearing and the back thrust bearing are arranged at one end of the static pressure radial air bearing. One end the rotor is in installing connection with the back thrust bearing and the front thrust bearing through the thrust plate. The other end of the rotor is in installing connection with the motor shaft. The super speed air bearing electric main shaft is high in limitation rotating speed, low in bearing temperature rising, and high in rotary precision, reduces the weight of a main shaft, improves dynamic characteristics of the main shaft, solves the problem of small-diameter deep hole grinding cooling problem, plays a role in cooling a main shaft motor rotor, and improves the supporting rigidity of a bearing and the rotary precision of the main shaft.

Description

Technical field [0001] The invention is the field of high -speed grinding processing equipment, involving a super -high -speed air static pressure bearing spindle. Background technique [0002] Circular grinding in small diameter deep holes is one of the difficulties that need to be solved at high speed processing. The ultra -high -speed electric spindle is a necessary equipment for the round grinding of small diameter deep pores. Its working speed requires more than 100,000 rpm.Most of the traditional ultra -high -speed electric spindles are supported by rolling bearings. Engineering applications have shown that high -speed operations have severely restricted the life of rolling bearings.First of all, the lubrication of rolling bearing needs to be improved. The traditional fat lubrication does not reach the ideal lubrication effect, and the oil and gas lubrication will be equipped with an additional oil and gas lubrication system to increase production costs.Small, these will di...

AI Technical Summary

Problems solved by technology

With the external liquid supply method, the coolant cannot reach the grinding area smoothly; while the coolant is passed through the inside of the electric spindle, because the spindle is a slender shaft, the pressurized coolant must be passed in, and a new seal is proposed for the internal seal of the spindle. challenge

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