某潜没式液货泵密封口环磨损量的确定

Determination of the Sealing Ring Clearance Wear Amount of a Submerged Cargo Pump

摘要: 为分析某潜没式液货泵密封口环间隙对泵性能的影响，建立泵的主流道模型和5种不同间隙流道模型并对其进行定常仿真计算。结果表明，随着密封口环间隙线性增大，泵的扬程、效率线性下降，表现为性能曲线整体下移；间隙内流体静压先陡降后增大然后线性减小，流速先上升后线性减小，间隙越小时压降的梯度越大，间隙内的流速也越低，密封效果越好。工程应用中为保证“密封”效果，密封口环磨损量超过0.2 mm时就应更换口环。

Abstract: In order to analyze the influence of the sealing ring clearance of a submerged cargo pump on the pump performance, the main flow channel model and five different clearance flow channel models were established and the steady simulation analysis was carried out respectively. The results show that as the sealing ring clearance increases linearly, the pump head and efficiency decrease linearly, which shows that the performance curve moves down as a whole; the static pressure of fluid in the clearance decreases sharply and then increases and then decreases linearly, the velocity of fluid in the clearance first rises and then decreases linearly, the smaller the clearance, the larger the gradient of the pressure drop and the lower the fluid velocity, then the better the sealing effect. Ensuring the sealing effect in engineering applications, the sealing ring should been replaced when the wear amount exceeds 0.2 mm.