中文摘要：

双螺杆混输泵在输送高含气率介质时,泵内温升对泵内转子间隙造成影响,进而影响泵的容积效率,在极端情况下,甚至会造成转子卡死以及混输泵的损坏。本文建立转子模型对高含气率下双螺杆混输泵转子的热变形和力变形规律进行研究,结果表明转子的热变形是转子变形的主要因素,螺杆转子的变形量会随着介质含气率的增加而增加,当含气率大于90%后,变形量显著增大,当含气率为99%时,径向最大变形量发生在出口端面的齿顶,轴向最大变形量发生在螺杆转子的吸入口侧轴的右端面上。通过分析变形对各间隙的影响后发现,齿根间隙变化最大,其次是齿顶间隙,而齿侧间隙几乎不发生变化。

英文摘要：

When twin-screw multiphase pump is operating under high GVF conditions,the inner temperature of the pump will increase obviously.The clearances between rotors will change greatly and influence the volumetric efficiency of the twin-screw multiphase pump.In some severe conditions,it may cause the pump damage.The screw rotor dynamic analysis model is established to show that the main deformation of the screw rotor is thermal deformation and the screw rotor deformation increases with the GVF increases.The results When GVF reaches more than 90%,the deformation increase is obvious.Radial maximum deformation occurs in end of the rotor export,axial maximum deformation occurs in the suction side on the right end when GVF is 99%.Through analyzing the influence of screw rotor deformation on the clearance,it can be realized that the greatest clearance changes are in the root of the rotor,followed by circumferential clearance,and there is no changes in flank clearance.