航天推进技术研究院主办
ZHOU Zhihua,WANG Haoming,WANG Yuanding,et al.Influence of ring clearance on the performance of two-stage high-speed centrifugal pumps[J].Journal of Rocket Propulsion,2023,49(05):66-72.
口环间隙对双级高速离心泵性能的影响
- Title:
- Influence of ring clearance on the performance of two-stage high-speed centrifugal pumps
- 文章编号:
- 1672-9374(2023)05-0066-07
- 分类号:
- V434.2
- 文献标志码:
- A
- 摘要:
- 为探究口环间隙对离心泵性能的影响,以双级低比转速高速离心泵为研究对象,测量了原型及减小口环间隙改进型的水力性能,对比了两种方案的测试结果,结合试验数据和计算分析了口环间隙对离心泵泄漏损耗及摩擦损耗的影响。结果表明:减小口环间隙能有效提高离心泵的扬程及效率,改进方案的泵效率提升约5%; 在设计转速测量工况范围内,随着流量的增大,原型方案的扬程系数逐渐下降,小口环间隙方案的扬程系数变化较小,扬程系数下降使得计算的泄漏损耗占比变化更加显著; 尽管减小口环间隙会增加摩擦损耗,但考虑泄漏损耗的影响时,确保运行安全的情况下减小口环间隙是提高泵性能的有效途径。
- Abstract:
- In order to explore the impacts of ring clearance on the performance of centrifugal pumps, a two-stage low specific speed centrifugal pump with high speed is chosen as the research object. The hydraulic performance of the prototype and improved scheme with decreased ring clearance are measured at multiple operation points, the test results of these two schemes are compared, and the influences of wear ring clearance on the leakage loss and friction loss are analyzed by experiments and empirical formula calculations. As a result, the reduction of ring clearance can effectively enhance the head and efficiency of centrifugal pumps, and the pump efficiency of the improved scheme is increased by 5%. In the range of measurement conditions at the designed speed, with the increase of the flow, the head coefficient of the prototype gradually decreases, while the change of the improved scheme is not obvious. The decrease in the head coefficient makes the change in the calculated leakage loss ratio more obvious. Although the friction loss is higher with a smaller ring clearance, reducing the ring clearance is an available approach to improve the pump performance which reduces the leakage loss remarkably.
参考文献/References:
[1] 朱祖超.低比转速高速离心泵的理论及设计应用[M].北京:机械工业出版社, 2008.
[2] 李文广,费振桃,蔡永雄.离心油泵叶轮口环间隙对性能的影响[J].水泵技术,2004(5):7-13.
[3] 吴大转,许斌杰,武鹏,等.多级离心泵内部间隙流动与泄漏损失[J].浙江大学学报(工学版),2011,45(8):1393-1398.
[4] 丛小青,蒋新禹,杨润宇.低比转速多级泵间隙尺寸改变对内部流场及其性能的影响[J].水电能源科学,2019,37(8):146-150.
[5] 王洋,张翔.叶轮口环间隙对低比转速离心泵效率的影响[J].排灌机械,2008,26(6):27-30.
[6] 张宁,高波,李忠,等.离心泵口环间隙对压力脉动特性影响的实验研究[J].工程热物理学报,2019,40(7):1520-1525.
[7] 郑路路.离心泵口环间隙非定常流动机理研究[D].杭州:浙江理工大学,2018.
[8] HOSHIDE R,NIELSON C E.Study of blade clearance effects on centrifugal pumps[EB/OL].https://ntrs.nasa.gov/citations/19730003766,1972.
[9] KAMIJO K,HIRATA K.Performance of small high speed cryogenic pumps[J].Journal of Fluids Engineering,1985,107(2):197-203.
[10] 杨从新,强盼,安莎,等.口环间隙变化对高转速离心泵性能的影响[J].排灌机械工程学报,2017,35(1):18-24.
[11] 杨从新,强盼.口环间隙对高速泵泵腔内流动特征的影响[J].排灌机械工程学报,2017,35(4):296-302.
[12] 杨从新,刘洋,安莎,等.基于轴承简化模型后口环间隙对泵性能的影响[J].西华大学学报(自然科学版),2017,36(2):1-5.
[13] 樊蓉.间隙对液氧涡轮泵流动机理影响研究[D].哈尔滨:哈尔滨工业大学,2019.
[14] 项乐,李春乐,许开富,等.诱导轮超同步旋转空化传播机理[J].火箭推进,2022,48(2):76-85.
XIANG L,LI C L,XU K F,et al.Inducer super-synchronous rotating cavitation propagation mechanism[J].Journal of Rocket Propulsion,2022,48(2):76-85.
[15] CHOI C H,NOH J G,KIM D J,et al.Effects of floating-ring seal clearance on the pump performance for turbopumps[J].Journal of Propulsion and Power,2009,25(1):191-195.
[16] 房煦峰,蔡毅杰,陈信,等.无油润滑高速离心泵的变转速性能研究[J].流体机械,2020,48(3):6-11.
[17] 夏鹏,王祥和,刘占生,等.CFD优化火箭涡轮泵间隙密封静动态特性计算模型[J].推进技术,2017,38(7):1603-1609.
[18] 程效锐,王晓全,陈红杏.高速离心泵口环密封流体激振力特性研究[J].水动力学研究与进展(A辑),2019,34(6):740-748.
[19] 杨宝锋,贾少锋,李斌,等.大偏心及大扰动下涡轮泵密封转子动力特性[J].火箭推进,2019,45(6):1-9.
YANG B F,JIA S F,LI B,et al.Investigation on rotordynamic characteristics of a turbopump seal under large eccentricities and disturbances[J].Journal of Rocket Propulsion,2019,45(6):1-9.
[20] 关醒凡.现代泵理论与设计[M].北京:中国宇航出版社,2011.
[21] GÜLICH J F.Centrifugal pumps[M].Berlin:Springer,2010.
相似文献/References:
[1]刘海丽,张立强,李学华,等.低比转速高速泵螺壳形式对性能影响分析[J].火箭推进,2015,41(03):52.
LIU Hai-li,ZHANG Li-qiang,LI Xue-hua,et al.Influence of volute case type for
low-specific-speed pump on pump performance[J].Journal of Rocket Propulsion,2015,41(05):52.
[2]张召磊,张 楠,窦 唯,等.诱导轮对高速离心泵性能的影响分析[J].火箭推进,2011,37(03):26.
ZHANG Zhao-lei,ZHANG Nan,DOU Wei,et al.Impact of inducer on characteristic of high-speed centrifugal pump[J].Journal of Rocket Propulsion,2011,37(05):26.
[3]严俊峰,陈炜.高速复合叶轮离心泵多相位定常流动数值模拟[J].火箭推进,2007,33(01):28.
Yan Junfeng,Chen Wei,Numerical analysis of flow features of a high-speed centrifugal pump with a complex impeller with multi-phase position[J].Journal of Rocket Propulsion,2007,33(05):28.
备注/Memo
收稿日期:2022-10-01; 修回日期:2022-12-10
基金项目:上海市产业协同创新基金(2022016)
作者简介:周治华(1991—),男,博士,研究领域为空间推进技术。
通信作者:王园丁(1987—),男,博士,研究领域为空间推进技术。