These characteristics and phenomenons have effect on the quality of gear pump , and it is difficult relatively to research them by theory . at present the research is limited to the phase of examination testing . theoretic research of the characteristics and the phenomenons of polymer gear pump are blank in china when the gear pump feeds the viscous polymer liquid of chemical flow with high temperature and high pressure 齿轮泵除具有流量和容积效率、扭矩和机械效率、功率和总效率等基本特性外，还存在着困油、噪声和气穴等现象，这些特性和现象直接影响齿轮泵的质量，对斜齿齿轮泵的这些特性和现象的理论研究难度较大，目前大多仍局限于实验测试研究阶段，而聚合物齿轮泵在输送化工流程中的高温、高压的粘流态聚合物时特性的理论研究在国内基本还处于空白。
So the characteristics and the phenomenons of ordinary helical gear pump and the polymer gear pump are researched by theory in this paper , and the new profile of the rotor of polymer gear pump is brought forward , which is very important to the academic development and actual application of the gear pump technology 为了改变这种局面，本文对普通斜齿齿轮泵和聚合物齿轮泵的特性均进行了深入的理论研究，并提出了聚合物齿轮泵转子新的齿形，对于齿轮泵技术的理论发展和实际应用均具有重要的意义。
