航天器用超低黏度齿轮泵关键参数研究

发布时间：2018-10-08 12:53

【摘要】：为提高航天器用超低黏度齿轮泵的容积率和减轻泵的质量,基于泵周向和径向的两类主要泄漏,给出容积率的计算公式;以泵体积最小和容积率最大构建出双目标优化模型;针对只考虑内泄漏最小、综合考虑体积和内泄漏最小、只考虑泵体积最小的3种优化方案,分别进行优化计算并对相关参数的影响进行分析。结果表明,为适应介质的超低黏度,泵齿轮副的齿顶圆直径以及齿顶厚度应尽可能大,轴孔直径尽可能小;轴向间隙对泵容积率影响极大,为控制内泄漏之关键;过渡区采用无减少径向力措施的全齿密封,为提高容积率之最佳选择;较大的进油口和较小的出油口直径,利于提高泵容积率及避免因自吸力不足而造成泵的气穴现象。
[Abstract]:In order to improve the volume rate of ultra-low viscosity gear pump and reduce the quality of the pump, the calculation formula of the volume rate is given based on the two main leakage of the pump in the circumference and radial direction, and the two-objective optimization model is constructed with the minimum volume and the maximum volume ratio of the pump. Considering only the minimum internal leakage, considering the minimum volume and internal leakage synthetically, and considering only the smallest pump volume, the optimal calculation is carried out and the influence of related parameters is analyzed. The results show that, in order to adapt to the ultra-low viscosity of the medium, the tooth top circle diameter and tooth top thickness of the pump gear pair should be as large as possible, the diameter of the shaft hole should be as small as possible, and the axial clearance has a great influence on the pump volume ratio, which is the key to control the internal leakage. In the transition zone, the whole tooth seal without reducing radial force is adopted, which is the best choice to increase the volume rate, and to increase the pump volume rate and avoid the cavitation phenomenon caused by the insufficient self-suction for the larger oil inlet and the smaller oil outlet diameter.
【作者单位】：成都大学机械工程学院;西华大学研究生学院;北京卫星制造厂;
【基金】：北京卫星制造厂资助项目(20804)
【分类号】：TH325

【参考文献】