口环间隙对离心油泵性能影响与被输送液体粘度有关。

The effect of the clearance on the performance is concerned with the viscosity of handling liquid.

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分析了影响外啮合直齿轮机油泵容积效率的主要因素 ，对油泵齿谷产生空穴和间隙漏损的机理进行了探讨。

Calculation of the geometric size of the modified gear, analysis of the flow characteristics of the outer-engaged gear pump, leakage and gap, radial force are discussed in this paper.

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