针对配油套与主轴密封间隙的变化在实际生产中缺乏理论支撑的问题,对其密封间隙的影响因素进行了研究,得出了密封间隙受温度影响的变化规律,对配油套的结构进行了相应的优化。实践结果表明:增加配油外套厚度、相应减小铜套厚度,采用离心浇铸工艺加工的配油套,能有效改善密封间隙对温度的敏感性,提高其密封性能。 Aiming at the lack of theoretical support in the actual production of the change of the gap between the oil distribution sleeve and the spindle, the influence factors of the seal gap were studied. The variation of the seal gap affected by the temperature was obtained. The corresponding optimization. The practice results show that increasing the thickness of oil jacket, reducing the thickness of copper jacket correspondingly, and using the oil distribution sleeve processed by centrifugal casting process can effectively improve the sensitivity of sealing gap to temperature and improve the sealing performance.