高速消防泵的设计及分析  

Design and analysis of high-speed fire pumps

作　　者：杨秀鑫 宋文武 魏立超 石建伟 王鑫 

机构地区：[1]西华大学能源与动力工程学院,四川成都610039

出　　处：《排灌机械工程学报》2017年第12期1036-1041,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：四川省教育厅重大培育项目(14CZ0013);四川省科技厅项目(2016JY0187);西华大学研究生创新基金项目(ycjj2015160)

摘　　要：为了解决现有车载消防泵体积大、扬程低等缺点,使其可以在超高层建筑消防领域发挥显著作用,采用加大流量法,并参考无过载设计理论,同时采取加装诱导轮及扩大喉部面积等措施设计了1种高转速离心式消防泵.采用UG软件对该泵进行建模,并采用Ansys软件,基于RNG k-ε湍流模型对该泵的水力模型进行三维定常全流场数值模拟.计算结果表明,该泵性能曲线平坦,效率较高,高效率区域较宽,同时不易发生过载现象,在150%流量处,扬程为额定扬程的71.3%,并检测到关死点扬程为额定扬程的126.7%.通过速度矢量图与静压力云图,分析了该泵诱导轮、叶轮、蜗壳的定常流动规律,分析显示,诱导轮可以有效提高泵的空蚀性能,该泵速度场分布均匀,叶轮叶片静压力分布合理,泵内部流动相对稳定,满足了消防泵的相关规范要求.In order to fix the drawbacks of large-size and low heads of the existing vehicle-mounted high-speed fire pumps,an advanced new pump,based on increasing flow method in combination with minimal power required additional inducers and enlarged throat area of volutes,is playing significant roles in firefighting of high or superhigh-storey buildings.Meanwhile,it was modeled through employing UG,and the turbulent numerical simulation of 3D steady flow on hydraulic model of the pump was carried out based on RNG k-ε turbulence model through Ansys.The calculated results show that performance curves of the pump are featured by stability,high efficiency,and wide high-performance area.Moreover,it is unlikely for the pump to have overloading situations.The head is 71.3% of rated head at the design flow of 150% and the head of shut off condition is 126.7% of rated head.The stationary flow rules of its inducers,impellers and volutes were analyzed through velocity vectors and static pressure.The results show the even distribution in velocity pattern and the sound arrangement between blades of inducers and impellers.Owning to the stability of the interior of the new pump,inducers can effectively improve their cavitation and erosion resistance.Consequently,this kind of pumps can meet standard requirements of fire pumps.

关 键 词：高速消防泵 加大流量法 无过载设计 数值模拟 性能曲线 

分 类 号：S277.9[农业科学—农业水土工程]