高空化性能多喷嘴射流离心泵的研制  

Development of a High Cavitation Characteristics and Multi-nozzle Jet Centrifugal Pump

作　　者：袁丹青[1] 乌骏[1] 杨敏官[1] 丛小青[2] 陆伟刚[2] 

机构地区：[1]江苏大学能源与动力工程学院 [2]江苏大学流体机械工程技术研究中心

出　　处：《农业机械学报》2008年第4期65-68,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：江苏省教育厅高新技术产业发展项目(项目编号:JH03-033)

摘　　要：离心泵进口加装射流装置可以提高泵的空化性能。传统的单喷嘴射流装置由于结构尺寸的限制,喉管部分不能很长,使液流混合不充分,导致射流装置效率低,空化性能改善不理想。提出利用多喷嘴射流装置来提升被吸液体的能量,在短喉管情况下能量能均匀混合,提高了射流装置的传能效率,大幅度改善了离心泵的空化性能。简要介绍了多喷嘴射流离心泵的基本结构,并对其做了相应的理论分析与对比性试验研究,结果表明加装多喷嘴射流装置后离心泵进口压力增加1.53m。Installation of a jet device in centrifugal pump inlet can improve property of anti-cavitation. Because of the limitation of structural dimension for traditional single injector jet device, the throat cannot be long, so the flow can not be fully mixed, which results the low efficiency of the jet device and the improvement of cavitation performance is not good. A new method has been advanced. Using multi-nozzle jet device to enhance the energy of sucked liquid, in case the throat was short, the mixture of energy could be uniformly mixed, which enhanced the efficiency of the jet device. The basic structure of multi-nozzle jet centrifugal pump was presented, some corresponding theoretical analysis was made and comparison test was done. The results showed that the installation of multinozzle jet device could increase the inlet pressure to 1.53 m. This method opened a new path for solving the cavitation problem of centrifugal pump and has an important significance in practical application.

关 键 词：离心泵 多喷嘴 射流装置 空化性能 

分 类 号：TH311[机械工程—机械制造及自动化]