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水压缸是核反应堆控制棒水压驱动机构的重要部分。建立了入缸流体能量方程和水压缸密封流动阻力方程,得到了理论模型。用该模型进行了水压缸步升压力变化过程理论分析。理论动态压力曲线很好地符合了实验曲线。结果表明:随着驱动压力的降低,水压缸步升前充压过程、步升增压过程和步升至顶端后压力变化过程所需时间逐渐增加,且步升增压过程终点压力逐渐减少。该研究结果为获得控制棒水压驱动系统的步进时间提供了理论基础。
The hydraulic cylinder is an important part of the nuclear reactor control rod hydraulic drive mechanism. The equation of fluid flow into the cylinder and the flow resistance of the cylinder are established, and the theoretical model is obtained. Using this model, the theoretical analysis of pressure fluctuation process of hydraulic cylinder was carried out. The theoretical dynamic pressure curve fits well with the experimental curve. The results show that as the driving pressure decreases, the time required for the cylinder to start pre-pressurization, the step-up pressurization and the step-up to post-end pressure changes gradually increases, and the pressure at the end of the step-up pressurization gradually decreases . The results of this study provide a theoretical basis for obtaining the step time of the control rod hydraulic drive system.