CAJ | 학술논문

EAST氦低温系统的氦透平膨胀机启动过程不稳定,主要表现为气体轴承失效,转子动平衡实验时,剩余平衡量过大.采用软支撑动平衡机对氦透平膨胀机的转子进行动平衡实验,通过转子动平衡去重,降低了转子剩余不衡量,提高了转子动平衡精度.针对软支撑动平衡机存在的低速动平衡精度不高的问题,在低速动平衡的基础上进行全速动平衡实验,进一步降低了转子的剩余不平衡量,提高转子动平衡精度,降低了转子对气体轴承的要求,保证了透平膨胀机的稳定运行.
EAST양저온계통적양투평팽창궤계동과정불은정,주요표현위기체축승실효,전자동평형실험시,잉여평형량과대.채용연지탱동평형궤대양투평팽창궤적전자진행동평형실험,통과전자동평형거중,강저료전자잉여불형량,제고료전자동평형정도.침대연지탱동평형궤존재적저속동평형정도불고적문제,재저속동평형적기출상진행전속동평형실험,진일보강저료전자적잉여불평형량,제고전자동평형정도,강저료전자대기체축승적요구,보증료투평팽창궤적은정운행.
The starting up process of helium turbine of EAST cryogenic system was very unstable,easily broken,for the unbalance value was too much,which induced the invalidation of gas bearing. By the helium turbine rotor balance testing with the soft balance machine to remove the unbalance,the unbalance value of rotor was decreased and the rotor’s balance precision was improved. Aimed at the problem of low precision existed in low speed soft balance testing,some full speed balance testing were done,and the unbalance value of the rotor was further decreased. The rotor’s balance precision is im-proved,the requirement of gas bearings by rotor is reduced,and the helium turbines running stabilization is insured.