航空柱塞式油泵ZB-16D柱塞腔壁贯穿故障分析

 对航空柱塞式液压泵ZB-16D的柱塞腔壁贯穿故障进行了结构和受力分析及计算。选取了合理的受力体力学模型,用三维边界元方法对受力体进行计算,得到各节点的应力,作出了相应的等值应力分布曲线,以及最大应力、平均应力与最小壁厚尺寸的关系曲线。根据转子受力情况及材料的力学性能,判断出柱塞腔壁贯穿故障属于高周疲劳破坏。分析计算的结果与实际破坏情况,二者比较接近。

AN ANALYSIS OF DAMAGE FAILURE OF PLUNGER HOLE WALL FOR THE PUMP ZB-16D

The calculation and analysis of the damage failure of the plunger hole wall for the aeroplunger pump ZB-16D are presented. After analyzing the structure of the hole wall and the exerted forces, an appropriate mechanical model is determined. By using the boundary element method of three-dimension calculation to the selected isolation body, the stresses of each node points under minimum thicknesses of the two adjacent hole wall are obtained. Isopleths of stress at some cross sections are made. The synthetical result based on the feature of force, the level of stresses and the strength of material indicate that the failure of the plunger hole wall belongs to high cycle fatigue of material. Finally, the curves of maximum and mean stress of the hole wall in relation to the sizes of minimum thickness are also presented. These curves will be of reference value for designing future plungler hole wall.