平衡双排轴向活塞泵的结构。1:外部拖鞋一双;2:外部旋转斜盘;3:泵轴;4:框架油封;5:内部旋转斜盘;6:内部垫板;7:内部活塞泵;8:外部球铰链;9:外部垫板;10:时刻; 11: compressed spring; 12: external piston pump; 13: cylinder block; 14: valve plate.