离心输油泵性能换算的简捷计算方法

Short Way to Converse Performance of Centrifugal Pumps

以离心泵特性曲线换算图为原始数据,建立了离心输油泵性能换算数学模型。采用Levenberg-Marquardt法优化了数学模型,将泵效率换算系数准确描述为与流量、扬程、原油粘度的非线性函数关系。在建模基础上,利用计算机程序设计建立了离心输油泵性能自动换算系统,该系统能够简捷、准确地优化泵机组设计或运行方案,实现泵性能的自动化换算。

Taking the characteristic curve conversion diagram of centrifugal pump as an original data,a mathematical model for characteristic conversion of centrifugal pumps is set up.Levenberg-Marquardt method is used to optimize the model and the conversion coefficient of pump efficiency is described as a non-linear function with flowrate,pump discharge head and oil viscosity. On the basis of model,performance automatic conversion system for centrifugal pump is established by program design of computer system.A calculation example shows that this system can shortly and accurately optimize the design or operation scenario for pump sets and realize performance automatic conversion for centrifugal pumps.