核主泵转子屏蔽套热套装理论与实验研究

Theoretical and Experimental Study on Shrink Fitting of Reactor Coolant Pump Rotor Can

转子屏蔽套是AP1000核主泵的关键部件之一,转子屏蔽套的热套装是其制造和装配过程中最为关键的工序。文章首先对转子屏蔽套的热套装工艺进行了理论分析,指出了影响转子屏蔽套热套装的主要因素,分析了原有热套装工艺失败的原因,并针对原有热套装工艺的不足,提出了相应的改进措施。开展了转子屏蔽套热套装实验,实验结果表明,采用改进的热套装工艺,可以延长转子屏蔽套的热套装时间,降低了热套装的难度,提高了转子屏蔽套的热套装成功率。

Rotor can is one of the key components in AP1000 reactor coolant pump. Shrink fitting is the most important procedure during the manufacturing process and the assembling process of reactor coolant pump rotor can. Firstly, the theoretical analysis was preformed to point out major factors affecting the shrink fitting process of rotor can and analyze the unsuccessful reason of the original shrink fitting of the rotor can. Then, the disadvantages of the original shrink fitting technology were pointed out and corresponding improved measures were taken. In addition, the shrink fitting experiments were carried out. The experimental results indicate that the improved shrink fitting technology can expand the shrink fitting time, which reduces the shrink fitting difficulty and improves the success ratio of the shrink fitting of the rotor can.