平衡式复合齿轮泵的内部泄漏是影响其容积效率的主要原因。
The inner leakage, as the major factor, affects the efficiency of the cubage of the balanced compound gear pump.
根据建立的函数关系式，可直接计算泵的容积效率和所需的泵的体积排量，或迭代求出地面产液量。
Based on the established functional relation, the V_e and the required P_d can be calculated directly, or the total liquid production rate at surface can be calculated indirectly.
KOVATS方法是预测泵特性的传统方法，本文对其加以改进，用叶片尖端间隙数值解析法预测其中的容积效率。
A · DE · KOVATS method is a traditional method for forecasting the characteristics of pump. It has been improved in this paper.
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