大型离心泵驼峰不稳定特性改善技术研究  

Research on Improvement Technology of Hump Instability Characteristics of Large Centrifugal Pump

作　　者：王向志 张广[1,2] 吴喜东[1,2] 杨振彪 WANG Xiangzhi;ZHANG Guang;WU Xidong;YANG Zhenbiao(State Key Laboratory of Hydro-power Equipment(Harbin Institute of Large Electrical Machinery),Harbin 150040,China;Harbin Electric Machinery Company Limited,Harbin 150040,China;Han River to Wei River Water Diversion Project Construction Co.,Ltd.,Xi'an 710000,China)

机构地区：[1]水力发电设备国家重点实验室(哈尔滨大电机研究所),哈尔滨150040 [2]哈尔滨电机厂有限责任公司,哈尔滨150040 [3]陕西省引汉济渭工程建设有限公司,西安710000

出　　处：《大电机技术》2020年第2期61-64,共4页Large Electric Machine and Hydraulic Turbine

基　　金：国家重点研发计划——长距离调水工程闸泵阀系统关键设备与安全运行集成研究及应用(2016YFC0401808)。

摘　　要：大型调水工程泵站的水泵型式常采用离心式,而低比转速离心泵在小流量工况下易产生驼峰,引发流动分离、进口回流、旋转失速等不稳定现象,造成大量能耗,在运行中可能出现不稳定工况,影响泵的安全运行。本文针对某泵站进行具体的参数选型,提出了2种方案。通过CFD建模、数值仿真计算、模型加工试验等手段,验证了通过叶轮优化来改善水泵的驼峰裕度,为大型离心泵的稳定运行,提供了设计参考。Centrifugal pump is often used for large-scale water transfer pump station.While the low specific speed centrifugal pump is prone to hump in low-flow conditions,causing instability such as flow separation,inlet recirculation,and rotational stall,lead to large energy consumption.These situations will affect the safe operation.In this paper,we make a specific scheme for a pump station,and design two programs.Through CFD modeling,numerical simulation calculation,model machining and model test,it is verified that the hump margin of the pump is improved by impeller optimization,which provides the reference for the subsequent development of large centrifugal pump.

关 键 词：离心泵 数值仿真 模型试验 驼峰裕度 

分 类 号：TK734[交通运输工程—轮机工程]