本文介绍了新开发研制的高精度混合陶瓷轴承的材料性能、精度等级和低启动力矩等特性，加工的陶瓷球精度可以达到G3以上，表面粗糙度可以控制在5nm以下，批量生产混合陶瓷轴承精度可以达到P4级以上。实验表明轴承启动力矩小，无润滑状态下启动力矩比相同类型的钢制轴承小一个数量级以上。轴承极限转速高，脂润滑条件下轴承最高极限转速可达6．7万转，轴承使用寿命是同规格钢球轴承的约3～4倍。轴承精度已经达到国外同类产品的精度水平，但成本只有进口陶瓷轴承的-1／2。%This paper introduces the material property, precision grade and low starting torque behavior of the mixed ceramic bearings developed and manufactured by Dalian University of Technology and Dalian Dayou Precision Ceramic Beating Co., Ltd. The highest precision grade of the ceramic balls reaches up to G3. The highest surface roughness can be controlled under 5nm. The precision of the mixed ceramic bearings in large scale production reaches P4. Experiments show that the ceramic bearing gives one order smaller of the start-up torque than the corresponding steel beatings. The bearings have the high limiting rotation speed of 67000rpm under grease lubrication and give an operation life of 3-4 times than the corresponding steel beatings. The mixed ceramic beatings give the same level of precision as the imported beating products, but the cost of our ceramic beatings is only 50% of the imported ceramic bearings.
展开▼
