摘要
针对叶轮轴向力计算方法有多种,且不同经验公式计算的轴向力相差很大的情况,通过对海水淡化多级泵的单级模型泵进行轴向力试验,找出泵腔压力分别与泵流量、扬程以及泵腔径向尺寸的关系,并对传统轴向力理论计算公式进行修正.通过分析可知,轴向力传统理论计算公式的计算结果与轴向力试验数据有一定的差距,这主要是由于传统理论计算是在泵腔内液体以叶轮旋转角速度之半(ω/2)旋转的假设条件下得到的;但两者轴向力的变化趋势相同,均在关死点处达到最大值.用修正的理论公式得到的值与试验值在各流量点、各半径处均能较好的符合.
By experimental investigation on the axial force for a single-stage model pump of the seawater desalination multi-stage pump, the relationship among the chamber pressure, the pump capacity, the head, and the radius was found out, which can be used to revise the traditional axial thrust formula. There are great differences between the results calculated from the traditional formula and the test ones. The reason is that the traditional formula is under the assumption that the liquid in the pump chamber is rotating at ω/2 ; however the trends of the axial thrusts in the two results are identical, they all reach the biggest value at the point without flow. The calculated values of the revised formula agree well with that from test at all flow rates and radius.
出处
《排灌机械》
EI
2009年第2期105-110,共6页
Drainage and Irrigation Machinery
基金
国家科技支撑计划项目(2006BAB03A02)
江苏省高新技术项目(BG2006024)
关键词
多级泵
轴向力
泵腔压力分布
理论计算
修正公式
multi-stage pump
axial thrust
distribution of chamber pressure
theoretical calculation
correlation formula
