Study on Cyclic Relaxation Characteristics of C-ring for Reactor Pressure Vessel
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摘要: 反应堆压力容器C形密封环由3层结构组成，在实际服役过程中，各层结构间相互作用机理复杂，多次压缩-回弹循环后，密封结构有循环松弛现象出现，导致密封性能衰退。针对上述循环松弛现象进行了实验研究，获得了C形密封环密封性能随循环次数的衰减规律，研究了其循环松弛特性；通过理论模拟计算分析获得了循环松弛规律的总回弹量、有效回弹量、工作点线载荷等特征量；通过实验与理论模拟计算结果的对比，揭示了制造工艺对循环松弛特性的影响规律。本文研究可用于指导C形密封环的服役性能评价及制造工艺控制和优化。Abstract: The C-ring for reactor pressure vessel is composed of three layers. In the actual service process, the interaction mechanism between the layers is complex. After multiple compression-rebound cycles, the sealing structure has cyclic relaxation, resulting in the degradation of sealing performance. The experimental study on the above cyclic relaxation is carried out, the degradation law of the sealing performance of C-ring with the number of cycles is obtained, and its cyclic relaxation characteristics are studied. Through theoretical simulation calculation and analysis, the total springback, effective springback, working point line load and other characteristic quantities of the cyclic relaxation law are obtained; By comparing the experimental and theoretical simulation results, the influence of the manufacturing process on the cyclic relaxation characteristics is revealed. The research in this paper can be used to guide the service performance evaluation and manufacturing process control and optimization of the C-ring.
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Key words:
- RPV /
- C-ring /
- Cyclic relaxation
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图 3 总回弹量随循环次数的变化曲线
Figure 3. Variation Curve of Total Springback with the Number of Cycles
图 7 密封特性特征量随循环次数的变化曲线
Figure 7. Variation Curve of Characteristic Quantity of Sealing Characteristic with the Number of Cycles
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