High-speed main shaft with controllable non-uniformly distributed pre-tightening force and control method thereof based on regulation and control of hydraulic system

Abstract

The invention discloses a high-speed main shaft with controllable non-uniformly distributed pre-tightening force and a control method thereof based on regulation and control of a hydraulic system..The high-speed main shaft comprises a main shaft, a rolling bearing is arranged on the circumference of the main shaft, a hydraulic pre-tightening force regulation and control system is arranged on the rolling bearing positioned on the front end of the main shaft and carries out regulation and control through a regulating and controlling device, and the hydraulic pre-tightening force regulation and control system comprises a hydraulic actuating sleeve and an end cover, wherein, the hydraulic actuating sleeve acts on the circumference of the rolling bearing, the end cover is arranged on the circumference of the hydraulic actuating sleeve, and the end cover and the hydraulic actuating sleeve form a sealed hydraulic oil cavity; the hydraulic actuating sleeve is provided with a temperature sensor; and the regulating and controlling device regulates the pre-tightening force applied to the rolling bearing through a signal detected by the temperature sensor. In the invention, accurate pre-tightening force regulation and control are carried out on different regulation and control points of a bearing outer ring at different temperatures, and on-line closed-loop regulation and control is carried out on the non-uniformly distributed pre-tightening force of a support bearing of the main shaft so as to obtain the high-speed main shaft with high performance under different working conditions.

Description

technical field [0001] The invention belongs to the application field of regulation and control of rolling bearing performance of a high-speed spindle, and relates to a high-speed spindle with controllable pretightening force of non-uniform distribution based on hydraulic system regulation and a control method thereof. Background technique [0002] Rolling bearings are used as internal rotating support elements of high-speed spindles, and their service performance directly affects the dynamic performance of high-speed spindles, especially under the complex service conditions of the spindle system, such as the high-speed light-load and low-speed heavy-load replacement conditions of the spindle, requiring spindle bearings The service performance under different conditions can be controlled to meet the requirements of the dynamic performance of the spindle, so as to ensure the high precision and high reliability of high-speed machining. Therefore, how to adjust the service perf...

AI Technical Summary

Problems solved by technology

Simply applying a uniformly distributed axial preload to the bearing cannot effectively eliminate the non-uniform distribution of axial and radial clearances, nor can it meet the requirements of non-uniform distribution of working loads of high-speed spindles under certain working conditions , which will inevitably require exploring the application method and size of the rolling bearing preload from a more refined perspective, so that the service performance of the rolling bearing can be "excellent".

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