轻小型射流式自吸喷灌泵设计方法  被引量:1

Design method for light and small flow-ejecting self-priming spray pumps

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作  者:刘建瑞[1] 滕人博[1] 施卫东[1] 李红[1] 袁海宇[1] 

机构地区:[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出  处:《排灌机械》2008年第1期6-9,共4页Drainage and Irrigation Machinery

基  金:国家863计划项目(2006AA100211);国家农业科技成果转化项目(2006GB2C100098)

摘  要:研究了一种自吸时间快、泵外特性高的轻小型射流式自吸喷灌泵,其工作原理是在普通离心泵的基础上集成一套自循环射流系统,用来加快泵自吸过程中气液混合速度、气水分离速度及自吸时间.新的设计方法将叶轮出口直径增加4%-6%,出口宽度加大10%左右,压水室第Ⅷ断面面积加大4倍.试验结果表明,用该方法设计的喷灌泵具有较好的外特性和自吸性能,泵性能曲线稳定平坦、高效率区范围宽,泵的各项技术指标均满足设计要求,效率比国家标准规定值提高10.5%-11.1%,自吸时间比机械行业标准规定值缩短37-48 s.重量比传统自吸喷灌泵平均减轻20%.A light and small flow-ejecting self-priming spray pump which can prime faster with high efficiency is introduced. The new self-priming pump is designed with the self-priming equipment which can accelerate the mixture of air. The design method can enlarge the diameter of the vane by 4% -6%, the width of outlet by 10% and the Ⅷ section of volute by 4 times. The test result indicates that compared with the traditional self-priming pump, the performance curve of the new one is stable and smooth, the range of high efficiency is wide and the pump operates under the optimum condition. All the technical indexes of the pump are satisfied. The efficiency of the new type has been raised by 10.5% - 11.1%, the self-priming time shortened by 37 -48 s and the weight reduced by an average of 20%.

关 键 词:喷灌泵 离心泵 自吸装置 自吸时间 设计方法 

分 类 号:TH311[机械工程—机械制造及自动化]

 

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