核电厂主泵倒流工况转子动态特性分析与研究

Analysis and Research on Rotor Dynamic Characteristics of Nuclear Power Plant Reactor Coolant Pump under Reverse Flow Condition

为防止核电厂主泵在反应堆冷却剂倒流产生的冲击载荷作用下发生反转,在电机上设置了由恢复弹簧和液压缓冲器组成的棘爪式防倒转装置。根据防倒转装置的结构特点及其工作原理,建立了防倒转装置的理论模型和主泵转子的运动学方程,分析了主泵倒流工况转子运动的动态特性,得到了转子的速度-位移运动轨迹。结果表明,由于反应堆冷却剂倒流产生的冲击载荷小于防倒转装置的设计载荷,主泵转子在倒流工况下经历包含6个运动状态的往复运动后,转速逐渐降低直至停止,实现了防止主泵反转的功能。

In order to prevent the RCP pump reverse rotation under the impact load of the reverse flow, the pawl type anti-reverse device consisted of return springs and hydraulic shock absorbers is mounted on the motor. According to the structure and working principle of anti-reverse device, the theoretical model of the anti-reverse device and the kinematic equation of the rotor under reverse flow condition are established. The dynamic characteristics of RCP pump rotor under reverse flow condition are analyzed, and the movement trajectory of the rotor is obtained. The results show that because the impact load under reverse flow condition is less than the design load of the anti-reverse device, the RCP pump rotor is subjected to reciprocating motion with six motion states, and the rotational speed of the RCP pump rotor is gradually reduced until it stops. The anti-reverse function is obtained by the anti-reverse device.