排灌机械工程学报2011，Vol.29Issue(5)：374-378,417,6.DOI:10.3969/j.issn.1674-8530.2011.05.002
火电机组脱硫泵的设计及其磨损
Design and abrasion of desulphurization pump for thermal power unit
摘要
Abstract
Geometric parameters of a desulphurization pump for thermal power plant such as impeller diameter, impeller outlet width, blade stagger angles, and pumping chamber were optimal designed based on the design method of two-phase flow theory. The hydraulic performance and efficiency of the desulphurization pump had been improved by increasing the blade outlet width and chamber dischar-ging diameter properly, and abrasion of the pump was reduced by decreasing the blade outlet angle. The three-dimensional full flow field model was built based on Pro/E software, and the solid-liquid two-phase flow field of the desulphurization pump was calculated through CFD software Fluent 6. 3 with Eulerian multiphase flow model. Abrasion mechanism of the two-phase flow field was indicated. Wear of the flow passage components and the main wear parts were predicted according to numerical calcula-tion and analysis of the solid volume concentration distribution in the desulphurization pump passage at design point. It can be concluded that main wear parts of the impeller are impeller inlet and outlet, pressure surface, front lines, and front shroud. A replaceable structure form of wear-resisting lining, board clearance self-compensation device in pumping chamber is designed, which ensures the pump to have higher efficiency and longer service life. Test of the pump performance show that the pump had reasonable structure, and the pump efficiency at design point is improved by 3.8%.关键词
脱硫泵/几何参数/数值模拟/设计/磨损Key words
desulphurization pump/geometric parameters/numerical simulation/design/abrasion分类
农业科技引用本文复制引用
刘建瑞,何小可,刘亮亮,李昌,向宏杰..火电机组脱硫泵的设计及其磨损[J].排灌机械工程学报,2011,29(5):374-378,417,6.基金项目
“十一五”国家科技支撑计划项目(2008BAF34B10) （2008BAF34B10）
