针对熔体齿轮泵齿轮啮合过程中齿槽容积变化，从而引起微观波动的问题，基于扫过面积法建立了外啮合变位齿轮泵流量计算模型。利用该模型，以齿轮泵平均流量和流量脉动率等参数为指标，分析了齿数增长时，高度变位、角度变位正传动和角度变位负传动等情况中齿轮变位系数对挤出稳定性的影响。%Aiming at the problem of micro fluctuation which was brought by gear pump,due to the variation of the tooth space volume in the meshing process of two gears,a flow calculation model of gears with profile modification was established based on swept area method herein. Based on the model,the effect of modification coefficient on extrusion stability when the number of teeth increased was analyzed for the situations of addendum modification, positive angle modification and negative angle modification, using average flow rate and flow pulsation as evaluating indexes.
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