结合实验事实分析了用加大后密封环直径并配以适当平衡孔直径的方法平衡单级单吸离心泵轴向力时,后密封环半径加大量Δr和平衡孔直径α数对(即Δr—α数对)存在最佳值的原因及选择它的条件,同时以实验证实了密封环间隙对轴向力的影响。 Based on the experimental facts, when the axial force of the single-stage single-suction centrifugal pump is balanced by increasing the diameter of the seal ring and matching the diameter of the balanced hole, the increase of the radius of the back seal ring Δr and the balance of the diameter α of the balance hole (that is, Δr -α number pairs), and the conditions for choosing the best value. At the same time, the effect of seal ring clearance on the axial force was confirmed experimentally.