The variation pattem of end play of tuborills during assembling is investigated, and it is pointed out that endplay will change while both the rotor and stator is compressed.

• 鉴于此，分析了涡轮钻具装配过程中轴向间隙的变化规律：一是涡轮转子压紧时轴向间隙发生变化；二是涡轮定子压紧时轴向间隙发生变化。