齿轮泵轴向浮动侧板力矩平衡机制改进

Moment Balance Mechanism of Gear Pump’s Axial Floating Wear Plate

摘要:

针对外啮合齿轮泵浮动侧板在多工况下磨损问题提出了一种新型的连通式平衡机制.相比将补偿面压力区与摩擦面压力区相隔开的传统分离式平衡机制，连通式平衡机制将浮动侧板补偿面油腔与侧板摩擦面连通，以使补偿面压力梯度与摩擦面压力梯度同步变化.针对浮动侧板的压力区特征，对侧板表面局部压力分布进行线性化假设，建立了基于离散特征点的参数化力矩模型.理论分析与试验测试表明，以浮动侧板所受合力矩为评价标准，在多工况条件下，相比分离式平衡机制，连通式平衡机制浮动侧板的自平衡和自适应能力提高了61.09%.

Abstract:

To reduce the abrasion of gear pump’s wear plate under multiple working conditions, a new mechanism connected balance mechanism, for wear plate’ balance was proposed. Compared with the separated balance mechanism, this method connects the back surface with the abrasion surface in the floating plate by a small hole on the high pressure side, therefore, pressure gradients on the back surface could change in accordance with the pressure gradients on the abrasion surface side. Based on the assumption that the local pressure distribution on wear plate was linear, the parameterization moment model based on discrete feature points was established. When floating plate’s total moment being taken as the criteria, both the theoretical analysis and experimental results show that, compared with the separated balance mechanism, the self balance and self adaptation capability of the connected balance mechanism plate increases by 61.09% under multiple working conditions.