摘要
针对碱泵强腐蚀的工作环境和效率较低的问题,提出了背开式双"S"形方形前盖板叶轮碱泵的设计方法.采用加大流量系数法,分析了叶轮各几何参数对泵的通过性能和效率的影响,得出双"S"形叶轮有利于高粘性、易结晶或含少量颗粒的介质通过的结论;采用HS-1镍基合金材料,研究其金相组织为奥氏体,保证了碱泵的耐蚀性能,降低了泵的造价;根据工艺要求,采用单级悬臂结构,提高系统的稳定性.试验结果表明,双"S"形叶轮碱泵扬程-流量曲线平稳,无驼峰,实际扬程52.3 m,流量为4 m3/h,效率为16.18%,满足设计要求,实现了碱泵的国产化,为小流量超低比转速泵用于输送高温、强腐蚀、粘性介质泵的设计提供了设计参考.
Aiming at the alkali pump works in a strong corrosion condition and low efficiency,a design method with dual ＂S＂ impeller was proposed.By using the enlarged flow rate coefficient method,the effects of geometry parameters of the impeller on passing performance and efficiency were analyzed and the hydraulic design method was introduced.The results show that the dual ＂S＂ impeller is benefit for transporting viscous medium.Adopting nickel-base alloy,its metallographic structure is austenite,named HS-1,assures the anti corrosion performance and reduces the cost of the pump.According to process engineering requirements,a single-stage cantilever structure was used and the system＇s stability was improved.The test result shows that the dual ＂S＂ impeller of alkali pump has a steady Q-H curve.In addition,the actual head is 52.3 m and the flow rate is 4 m3/h,the efficiency of the pump is 16.18%.All the technical parameters are satisfied for the design requirements and achieves localization of the alkali pumps.It is useful for the design of mini flow and low specific speed pump used in transporting high temperature,strong corrosion and viscous medium.
出处
《排灌机械工程学报》
EI
2010年第2期136-139,159,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
中石化国产化项目(W07012)
江苏大学高级人才科研启动基金资助项目(07JDG065)
关键词
碱泵
双“S”形叶轮
超低比转速泵
镍基合金
腐蚀
alkali pump
dual ＂S＂ impeller
low specific speed pump
nickel-base alloy
corrosion
