【摘要】 针对海水淡化高压多级泵产生较大轴向力的平衡问题,利用VB6.0编写海水淡化高压多级泵轴向力平衡机构的计算程序,设计了平衡盘与平衡鼓相结合的轴向力平衡机构.设计中使平衡盘具有较高的灵敏度,通过计算软件研究平衡盘外径与平衡鼓受力比的关系,最终确定平衡鼓受力比为70%,平衡盘灵敏度k的范围为0.23~0.28,由此确定了平衡机构各个部件的尺寸.为了避免平衡盘端面接触摩擦,在计算程序中研究了间隙b2与平衡力波动的关系,并且比较了计算程序所得泄露率与试验的结果,误差仅为5.11%.结果表明:海水淡化高压多级泵的平衡机构,有效解决了较大的轴向力平衡问题,试验所得泄漏量仅为流量的2.6%,远低于一般多级泵平衡机构的泄漏量.更多还原

【Abstract】 In order to balance the large axial force on the SWRO-HP pump,a program for calculating the axial thrust equilibrator is written by the VB 6.0,and a special equilibrator making up with balancing disc and balancing sleeve is designed by using the program.In order to get a better sensitivity on the balancing disc,the connection between the diameter of balancing disc and the force bear by the balancing piston is studied by using the program.The force bear by the balancing piston is 70%,and the range of sensitivity is 0.23～0.28,Based on these the size of geometry for equilibrator is confirmed.In order to avoid the end-plate of balancing disc to contact friction,the connection about the change of b2 and equilibrant is worked out by using the program.Compared with the test,the difference of the leakage rate is just 5.11%.The problem of large axial thrust which is brought by the SWRO-HP pump is successfully solved by the equilibrator.The leakage is 2.6% of the SWRO-HP pump′s flow rate,far less than the general multi-stage pump.更多还原