Aimming at the status that the improvement in extrusion pressure is limited by the problem of radial force existed in extruder conventional gear pump,based on the principle of harmonic gear transmission,a new type of gear pump is proposed. The radial force is balanced from structure and working principle in the new pump,which is beneficial to increase the extrusion pressure of gear pump.Having good features of pressurization,pressure stabilization,steady and uniform extrusion output,and squeezing out double amount of material,the innovative ideas of the new pump creates a novel way to promote the performance and competitiveness for gear pumps.%针对挤出机常规齿轮泵因存在径向力问题而使挤出压力的提高受到限制的现状，借鉴谐波齿轮传动原理，提出了一种新型齿轮泵，从结构、原理上实现了径向力的平衡，有利于增加齿轮泵的挤出压力，具有增压、稳压、挤出量稳定均匀的良好特性，并可挤出双倍的物料量，为提升齿轮泵的性能与竞争力开创了新途径。
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