双锥对置锥螺杆海水液压泵流场数值模拟分析

为了深入分析泵压对双锥对置锥螺杆海水液压泵特性的影响，建立了该液压泵系统的三维模型及其流体动力学分析模型，运用CFD软件对液压泵的内部流场进行仿真分析，分别得出了不同进出口压差条件下和不同转子位置时的腔室液体压力分布以及转子受到的液压力。分析表明：新型海水液压泵腔室压力分布以啮合线为界限，由入口处到出口处交叉分布，且压力值逐级递增；左右转子受到的轴向液压力大小相等，方向相反；转子受到的液压力的方向沿转子自转的相反方向转动，而液压力大小基本不变。

Numerical Simulation on Flow Field of Opposed Biconical Cone Screw Seawater Hydraulic Pump

In order to study the effects of pressure on the new-type opposed biconical cone screw seawater hydraulic pump, a three-dimensional model of the new-type pump and the corresponding fluid dynamics model were presented. The flow fields for different pump pressure conditions and different positions of the cone screw rotor were numerically simulated, where the pressure distribution in the sealing cavity and the hydraulic force on the rotor were obtained．Analyses show that, the pressure distribution divided by the meshing lines of cone screws and bush is gradually increased from the inlets to the outlet; the axial hydraulic forces on the two symmetrical cone screws are equal in magnitude but opposite in direction; direction of the hydraulic force on rotor rotates in the opposite direction of rotator's rotation, while the force value is constant.