为实现泵用轴承-轴颈滑动副的全流体润滑状态，采用传统径向滑动轴承设计的逆过程，由先期创建的承载量系数的拟合式，构建以直径间隙、轴径、宽径比为设计变量，轴颈挠度与最小油膜厚度的比值为目标函数的优化模型。实例结果表明：轴颈直径总能取得由加工工艺和泄漏控制所决定的上限值；轴颈挠度比直径间隙差2个数量级，轴颈倾斜变形对承载量系数的影响可以忽略不计等。得出通过直径间隙、轴径、宽径比的优化取值，泵用轴颈能实现全流体润滑的重要结论。
Abstract
To achieve full fluid lubrication status of journal sliding bearing in external gear pumps, based on reverse process of traditional radial sliding bearing design, we build an optimization model taking diameter clearance, shaft diameter and width-diameter ratio as the design variables and ratio of journal deflection to minimum oil film thickness as the objective function by an early created polynomial fitting formula of bearing capacity factor. The results show that the journal diameter is always equal to its upper limited value decided by its process and leakage control of pumps; the shaft deformation value is 100 times smaller than diameter clearance value, so the influence of journal deformation on bearing capacity factor can be neglected, etc. It is concluded that the optimized diameter clearance, journal diameter and width diameter ratio can provide the full fluid lubrication.
关键词
齿轮泵；全流体润滑；逆向设计；直径间隙；轴径；宽径比
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Key words
gear pump, full fluid lubrication, reverse design, diameter clearance, journal diameter, width diameter ratio
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基金
四川省自然科学重点资助项目（16ZA0382）；北京卫星制造厂资助项目（20804）
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