摘要 高速加工能显着提高生产率和降低生产成本，是一项非常有前景的先进制造技术。实现高速加工的首要条件是高质量的高速机床，而高速电主轴是高速数控技术和加工中心的关键部件。电主轴系统的静态、动态刚度是影响性能主要难题之一。本文首先介绍了电主轴的工作原理及关键技术；然后，设计了合理的电主轴总体结构，并设计了电主轴的电机、编码器、转子、定子和冷却系统等零部件；最后，对电主轴的旋转轴和轴承进行了详细的分析和校核，计算表明，该电主轴符合设计要求，具有结构紧凑、惯性小、转速高、动态特性好等诸多优点。 关键词：加工中心，电主轴，轴承 Abstract High-speed machi
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ng tech
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ne tools, a
nd high-speed electric spi
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ng ce
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nd key tech
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n, determi
ne a reaso
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nd other desig
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nally, the rotatio
n of the spi
ndle shaft a
nd beari
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nalysis a
nd verificatio
n, calculatio
ns show that the desig
n meets the requireme
nts of the spi
ndle. Key Words:Machi
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nter；Electrical spi
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ng 目录 摘要I Abstract II 1绪论1 1.1选题的目的和意义1 1.2国内外的研究现状和发展趋势2 1.2.1国内外电主轴技术的研究现状与发展趋势2 1.2.2电主轴的国内外的发展趋势2 2电主轴结构设计4 2.1电主轴设计要求及整体结构4 2.2电主轴结构设计4 2.3轴的校核6 2.3.1轴的强度校核计算6 2.3.2轴的刚度校核计算9 3主轴轴承系统设计11 3.1主轴轴承的选择11 3.2主轴电机的选择13 3.3主轴轴承的预紧与刚度13 3.4电机转子的过盈量设计14 3.5轴承的校核15 3.5.1角接触球轴承的校核16 3.5.2深沟球轴承的校核17 4主轴润滑与冷却系统的设计19 4.1主轴的润滑19 4.2主轴的冷却19 4.3冷却系统的路线20 4.4主轴的密封20 5总结22 参考文献23 致谢24