ITER轴向绝缘子低温机械疲劳性能实验研究

文中在拉伸实验、压缩实验、弯矩实验和扭矩实验的基础上研究了ITER轴向绝缘子的低温耐疲劳性能,并对绝缘子的氦气密性能以及PASCHEN放电特性进行了检测.检测结果表明:ITER轴向绝缘子在6万次机械疲劳后,液氮温度4MPa氦气内气压下其氦气漏率在6.0×10-10Pa.m3/s以下；约100Pa氦气压、56kV高电压下...

Experiment research on low-temperature mechanic fatigue performance of ITER axial insulation breaks

Based on tension fatigue,compression fatigue,bending moment fatigue and torsion fatigue test at low temperature,the performances of ITER axial insulation breaks were evaluated.At the same time,the mechanical integrities were detected,such as helium tightness and PASCHEN discharge.The test results show that,after sixty thousand mechanical fatigue cycles,the maximum helium leakage rate is less than 6.0×10-10Pa.m3/s during 4MPa inner pressure at liquid nitrogen,the maximum leakage current is less than 15μA during 56kV occurring approximately 100Pa helium gas pressure to meet the design requirements of ITER insulation breaks during the working life of the ITER device.