乏燃料组件提升翻转机结构设计及动力学分析

为实现乏燃料组件提升和翻转动作同步进行，本文设计了基于双导轨提升翻转同步机构的提升翻转机，并在结构中设置安全防坠单元，保证紧急情况下乏燃料组件的安全性。为进一步保证乏燃料组件在提升、下降正常工况和钢丝绳断裂异常工况下的结构安全问题，以双导轨提升翻转同步机构为研究对象进行了动力学仿真分析，使用ADAMS软件分析其多体机械系统关键部件的运动规律与运行中复杂的受力特性，获得了不同工况下设备运行全程的速度及加速度特性曲线。结果表明：双导轨提升翻转同步机构工作时乏燃料组件所受的冲击力小于10 kN，翻转提升过程中翻转料仓的速度波动小于10%，仿真结果验证了系统设计的合理性和可行性。

Structural Design and Dynamics Analysis of Spent Fuel Assembly Lifting Upender

The lifting upender is the key equipment of the shearer in the head end of the spent fuel reprocessing. In order to realize the function of lifting the turning action synchronously, a new lifting upender based on double guide rail with lifting flip synchronous mechanism was designed, and safety anti falling unit was set in the structure to ensure the safety of spent fuel assembly in emergency. In order to further ensure the structural safety of the spent fuel assembly under the normal conditions of lifting and lowering and the abnormal conditions of wire rope fracture, the dynamic simulation analysis was carried out with designed equipment as the research object. The movement law of key components of the multi-body mechanical system and the complex force characteristics in operation were analyzed. The speed and acceleration characteristic curves of the whole operation process of the equipment under different working conditions were obtained by using ADAMS software. The results show that the impact force of the spent fuel assembly is less than 10 kN, and the velocity fluctuation of the turnover bin is less than 10% in the process of the double guide rail with lifting flip synchronous mechanism. The simulation results verify the rationality of the system design.