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为建立海水淡化水力自驱旋转式能量回收装置(HRERD,Hydro-Drive Rotary Energy Recovery Device)转子转速与系统流量间的关联关系,对特定几何规格的能量回收装置的转速变化规律进行了理论推导和实验验证。运用动量定理建立了转子受流体水力冲击而产生的动力矩与转子转速的关系式;以微元法为基础,运用牛顿黏性定律建立了转子周面和端面因流体黏性阻力而产生的阻力矩与转子转速的关系式;利用转子稳定时所受动力矩与阻力矩间的平衡关系,推导得到装置转速与系统流量间的理论公式。对装置在系统流量分别为4.4、5.0、6.0和7.1 m~3·h~(-1)时的理论转速与实验转速比较分析表明,理论转速略高于实验转速,两者相对误差不超过12%,对误差形成的可能原因也进行了分析说明。
In order to establish the relationship between rotor speed and system flow rate of a seawater desalination hydro-driven Rotary Energy Recovery Device, a theoretical derivation of the rotational speed variation of the energy recovery device with a specific geometry is carried out. Experimental verification. The relationship between the rotor torque and the rotor torque due to the hydraulic impact of the rotor is established by using the momentum theorem. On the basis of the micro-element method, the viscous resistance of the rotor peripheral and end faces is established by Newton’s viscosity law The relationship between the torque and the rotor speed, the theoretical formula between the speed of the device and the system flow rate is deduced based on the balance between the moment and the moment of resistance when the rotor is stable. The comparison of the theoretical speed and the experimental speed when the system flow rates are 4.4, 5.0, 6.0 and 7.1 m ~ 3 · h ~ (-1) respectively shows that the theoretical speed is slightly higher than the experimental speed and the relative error between them is no more than 12 %, The possible reasons for the formation of errors have also been analyzed and explained.