采用动压轴承的高速液氮离心潜液泵设计  

Design of a high-speed centrifugal submersible liquid nitrogen pump with hydrodynamic bearing

作　　者：张蓓乐 余程焕 王元清 陈双涛[1,2] 侯予 赖天伟[1,2] Zhang Beile;Yu Chenghuan;Wang Yuanqing;Chen Shuangtao;Hou Yu;Lai Tianwei(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;MOE Key Laboratory of Cryogenic Technology and Equipment,Xi'an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]深低温技术与装备教育部重点实验室,西安交通大学,西安710049

出　　处：《低温与超导》2024年第7期47-52,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金(51976150)资助。

摘　　要：针对低温流体泵小型化和潜液的需求,提出了一种基于液体动压轴承的高速液氮离心潜液泵的新结构。建立高速离心式液氮潜液泵的设计方法,着重探讨了低比转速离心泵的水力部件设计、液氮动压轴承开发、两级增压泵内轴向力平衡等关键环节。采用CFD仿真软件对液氮潜液泵的叶轮流道流动状态进行数值分析,结果表明增加诱导轮可提高泵的汽蚀性能,泵的水力性能结果符合设计预期,通过数值模拟和实验结果对比分析验证了泵设计的准确性和可靠性,为小型低温流体泵送应用提供参考。This study addressed the need for miniaturization and submersion capabilities in cryopumps by proposing a new structure for a high-speed centrifugal submersible liquid nitrogen pump based on hydrodynamic bearings.It established a design methodology for high-speed centrifugal submersible liquid nitrogen pumps,focusing on critical aspects such as the hydraulic component design of low-specific speed centrifugal pumps,the development of liquid nitrogen hydrodynamic bearings,and the balancing of axial forces in two-stage booster pumps.A numerical analysis of the flow domains in the impeller passage of a submersible liquid nitrogen pump was conducted using CFD simulation software.The results indicate that addition of an inducer can enhance the pump's cavitation performance,and the hydraulic performance of the pump meets the design expectations.The accuracy and reliability of the pump design are validated through a comparative analysis of numerical simulations and experimental results,providing a reference for the application of small-scale cryogenic fluid pumping.

关 键 词：离心泵 低比转速 液氮 液体动压轴承 

分 类 号：TH311[机械工程—机械制造及自动化]