中文摘要：

利用高性能结构陶瓷作为高速主轴及轴承材料研制开发了一种无内圈式高速陶瓷电主轴单元,进行了陶瓷轴承失效机理的分析与内部结构参数的优化,确定了高速陶瓷电主轴-轴承的最佳预负荷及最佳润滑条件,实现了高速陶瓷电主轴单元样机的精密装配,并对其进行了综合性能测试与分析.结果表明,在最佳预负荷和油气润滑条件下,高速陶瓷电主轴可充分发挥结构陶瓷材料优良的综合性能,如高硬度、低热膨胀性、轻重量、高耐磨性和好的化学及热性能,极大地减小了主轴-轴承单元高速旋转的离心力和惯性力,并有效提高了电主轴系统的精度、刚度和使用寿命,且运行稳定可靠,精度保持性好.

英文摘要：

A high-speed ceramic motorized spindle equipped with high-performance structural ceramic shaft and fully-ceramic ball bearings without inner rings is designed and developed. Internal structure parameters of ceramic ball bearings are designed and optimized based on its failure mechanism analysis. The preload and lubrication condition of high-speed ceramic motorized spindle-bearing system are optimized. The high-speed ceramic spindle prototype is assembled with high precision successfully, and its performance test and analyses are finished. The test results show that high-speed ceramic spindle can reduce the high-speed rotational centrifugal force and inertia force and increase the rigidity, rotation precision and life of spindle-bearing system greatly, because of engineering ceramics＇ extraordinary physical properties, such as high hardness, low thermal expansion, light weight, high abrasion resistant and good chemical and thermal stability, so it fulfils very well the high-speed and precision requirements of motorized spindle system.