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就控制棒水压驱动系统(CRHDS)运行过程中所出现的工况,利用流体力学理论方式研究分析了水压缸步进过程。首先建立了水压缸升压理论模型,对水压缸升压过程进行了分析;其次,根据实验运行工况,计算得出了水压缸运行性能,并利用实验数据验证了计算结果。计算结果表明:在升压过程中,当内套停止运动后,缸内压力出现拐点;内套位移增加,速度逐步减小;由于缸内压力增加,缸内和缸外的压差增大,密封环泄漏流速增大。缸内压力模型能够提供各个所需的物理量,为水压缸和驱动机构运动机理分析提供了理论基础。
The operating conditions of rod hydraulic drive system (CRHDS) were controlled. The hydraulic cylinder theory was used to study the step process of hydraulic cylinder. First, the theoretical model of hydraulic cylinder pressure boost is established, and the pressure increase process of the hydraulic cylinder is analyzed. Secondly, according to the experimental operating conditions, the hydraulic cylinder performance is calculated, and the experimental results verify the calculation results. The calculation results show that when the inner sleeve stops moving, the pressure in the cylinder will inflexion point when the inner sleeve stops moving; the displacement of the inner sleeve increases and the speed decreases gradually; the pressure difference between the cylinder and the outer cylinder increases due to the increase of the pressure in the cylinder, Seal ring leakage flow rate increases. The in-cylinder pressure model can provide all the required physical quantities, which provides a theoretical basis for the analysis of the movement mechanism of the hydraulic cylinder and the driving mechanism.