Research on Lift Pole Thread Fatigue of Magnetic Lifting Control Rod Drive Mechanism
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摘要: 对磁力提升型控制棒驱动机构的运动进行电磁-运动仿真。通过电磁分析、力学分析以及疲劳分析的方法,对控制棒驱动机构提升磁极螺纹进行了疲劳分析。结果表明,目前二代核电机型中驱动机构提升磁极在使用寿命内,螺纹结构满足使用要求,但对于第三代核电机型中驱动机构提升磁极在使用寿命末,第一牙螺纹的应力接近许用应力,疲劳寿命及疲劳安全系数偏低,需要进一步优化。Abstract: Control Rod Drive Mechanism（CRDM） is a servomechanism of reactor control and protection system,and it is the only movable equipment in reactor body.Its reliability affects the reactor safety and operation directly.Especially in accident conditions,CRDM must release the control rod to insert into the core immediately.This paper presents the thread fatigue analysis of the CRDM lift pole through electromagnetic analysis,mechanical analysis and fatigue analysis method,and presents a fatigue analysis method for thread bearing impact load in Magnetic Lifting CRDM.This method can be used in the analysis and design of the similar type of CRDM.
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Key words:
- CRDM /
- Finite element analysis /
- Fatigue Life
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