矿用离心泵特性曲线拟合方法的比较

Study on the fit method of characteristics curve of wear resisting mine drainage pump

在编制计算程序的过程中,如何精确的拟合出矿用离心泵特性曲线是解决水泵选型问题的关键。本文总结了水泵特性曲线拟合常用的三种方法,并结合某泵站的选型实例,对三种方法进行了计算对比。研究结果显示:最小二乘法计算精度最高,牛顿插值法编程的扩展性最好,而拉格郎日插值法的编程最简单。综合考虑计算精度、扩展性和编程复杂程度后,在编制矿用离心泵选型程序中作者推荐使用牛顿插值法。

It is very important to select type of mine drainage pump for designer to draw the characteristics curve accurately. The method of the characteristics curve fitting was analyzed basing on Least square method, Lagrange interpolation method and Newton Interpolation method. The results showed that Least square method is much more exactly, Newton Interpolation method is much more convenient, and the simplest method is Lagrange interpolation method.