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Analysis method applied to high speed main shaft unit thermal dynamic performance

An analysis method and technology of high-speed spindle, applied in the field of machinery, can solve problems such as large difference and inaccurate prediction

Active Publication Date: 2019-03-19
HUNAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Therefore, the existing heat transfer model of the spindle unit is quite different from the actual situation, and the prediction is not accurate enough

Method used

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  • Analysis method applied to high speed main shaft unit thermal dynamic performance
  • Analysis method applied to high speed main shaft unit thermal dynamic performance
  • Analysis method applied to high speed main shaft unit thermal dynamic performance

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Embodiment 1

[0162] Such as Figure 1-10 The shown method for analyzing the thermal dynamic performance of a high-speed spindle unit includes the following steps:

[0163] 1) Establish a pseudo-static model of angular contact ball bearings, including the internal geometric compatibility of the bearing considering thermal displacement and centrifugal displacement of the inner ring, the force relationship between the rolling elements and the bearing inner ring, and the relationship between the overall load and displacement of the bearing; 2) Analyze the change of bearing ring thermal displacement and centrifugal displacement under different installation methods; 3) According to the needs, carry out certain model simplification of the spindle unit and divide the thermal network nodes, determine the bearing heat transfer path under different lubrication methods, and establish The heat transfer network model of the spindle unit and the spindle unit heat transfer equation based on thermal resistanc...

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Abstract

The invention discloses an analysis method applied to the high speed main shaft unit thermal dynamic performance. The internal geometric compatibility relation of an angular contact ball bearing underthe thermal effect is cleared, more accurate bearing loop thermal displacement calculation formulas under different installing modes are built, and on the condition that the contact thermal resistoris considered, a main shaft unit thermal transmission network model under different lubricating modes is determined, the dynamic coupling relation between bearing friction heat and main shaft unit heat displacement under the heat effect is considered, the coupling calculation process is built, and therefore the thermal dynamic performance of the high speed main shaft unit can be mastered more accurately and reasonably.

Description

Technical field [0001] The invention belongs to the field of machinery, and in particular relates to an analysis method applied to the thermal dynamic performance of a high-speed spindle unit. Background technique [0002] With the continuous development of industrial technology, the machining accuracy of machine tools is increasing day by day, and the spindle unit, namely the spindle bearing system, plays an important role. Compared with sliding bearings, rolling bearings have the advantages of simple structure, convenient installation, less fuel consumption and can bear radial and axial loads at the same time. Therefore, rolling bearings are widely used as one of the spindle supports in various spindle units. Most of them are high-speed angular contact ball bearings. During the high-speed operation of the machine tool spindle system, bearing friction heat is one of the main heat sources of the system. A large amount of friction heat will cause the temperature of the spindle un...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01N25/20
CPCG01M13/00G01N25/20
Inventor 周长江屈泽峰胡波陈国淳
Owner HUNAN UNIV