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基于补偿切割法的离心泵轴向力控制试验

曾继来 刘在伦 吴新瑞 赵伟国 张森

曾继来, 刘在伦, 吴新瑞, 等. 基于补偿切割法的离心泵轴向力控制试验[J]. 航空动力学报, 2023, 38(1):206-214 doi: 10.13224/j.cnki.jasp.20220270
引用本文: 曾继来, 刘在伦, 吴新瑞, 等. 基于补偿切割法的离心泵轴向力控制试验[J]. 航空动力学报, 2023, 38(1):206-214 doi: 10.13224/j.cnki.jasp.20220270
ZENG Jilai, LIU Zailun, WU Xinrui, et al. Experiment of axial force control for centrifugal pump based on compensation trimming method[J]. Journal of Aerospace Power, 2023, 38(1):206-214 doi: 10.13224/j.cnki.jasp.20220270
Citation: ZENG Jilai, LIU Zailun, WU Xinrui, et al. Experiment of axial force control for centrifugal pump based on compensation trimming method[J]. Journal of Aerospace Power, 2023, 38(1):206-214 doi: 10.13224/j.cnki.jasp.20220270

基于补偿切割法的离心泵轴向力控制试验

doi: 10.13224/j.cnki.jasp.20220270
基金项目: 国家自然科学基金(52169018); 河南省自然科学基金(222300420166); 河南省高等学校重点科研项目(22A470003)
详细信息
    作者简介:

    曾继来(1988-),男,博士生,主要从事流体机械内部流场数值分析及测试技术研究。E-mail:15193110850@163.com

    通讯作者:

    张森(1990-),男,讲师,博士,主要从事叶轮机械原理与流动控制研究。E-mail: szhang@hpu.edu.cn

  • 中图分类号: V228.1;TH311

Experiment of axial force control for centrifugal pump based on compensation trimming method

  • 摘要:

    为解决切割叶轮后盖板平衡轴向力的方法会导致泵扬程和效率降低这一关键问题,提出了一种补偿叶轮后盖板切割量平衡轴向力的方法。采用在同一个叶轮上切割叶轮后盖板和补偿叶轮后盖板切割量的研究方案,开展了泵性能、叶顶间隙压力、前后泵腔及平衡腔液体压力的系统测量。试验研究表明:以原型叶轮在设计流量下的扬程、效率和轴向力为基准,相对切割率为3.81%、7.62%、11.43%时,泵的扬程分别下降了3.52%、6.41%、9.93%,效率分别下降了2.97%、4.59%、6.18%,轴向力分别降低了8.02%、20.57%、22.3%;而补偿叶轮后盖板切割量后,泵的扬程最大降幅仅为4.18%,效率最大降幅仅为2.7%,轴向力最大降幅达到了83.1%;相对于切割叶轮后盖板而言,补偿叶轮后盖板切割量可以使前泵腔压力升高而后泵腔压力降低。

     

  • 图 1  离心泵开式试验台

    1 电动机;2 转速转矩传感器;3 试验泵;4 1#球阀;5 计量储水桶;6 储水桶;7 1#电磁流量计;8 调节阀;9 水箱;10 2#电磁流量计;11 回水管路;12 2#球阀;13 进水管路。

    Figure 1.  Centrifugal pump open experiment bench

    图 2  泵腔和叶顶间隙压力测试装置

    Figure 2.  Pump cavity and tip clearance pressure test device

    图 3  稳压罐

    1 测压点;2 传感器;3 稳压罐;4 排气阀;5 压力表。

    Figure 3.  Pressure stabilizing device

    图 4  叶轮实物图

    Figure 4.  Physical photos of impeller

    图 5  整体泵盖实物图

    Figure 5.  Physical photo of integral pump cover

    图 6  性能试验结果

    Figure 6.  Performance experiment results

    图 7  前泵腔压力分布试验曲线

    Figure 7.  Experiment curve of pressure distribution in front pump cavity

    图 8  后泵腔压力分布试验曲线

    Figure 8.  Experiment curve of pressure distribution in rear pump cavity

    图 9  平衡腔压力与相对切割率或补偿率的关系

    Figure 9.  Relationship between the balance cavity pressure with the cutting rate or compensation rate

    图 10  实测叶顶间隙压力均值

    Figure 10.  Average value of the measured tip clearance pressure

    图 11  叶轮轴向力特性曲线

    Figure 11.  Characteristic curve of impeller axial force

    表  1  IS80-50-315型离心泵性能参数和主要几何参数

    Table  1.   Performance parameters and main geometric parameters of IS80-50-315 centrifugal pump

    设计参数数值
    额定流量Qsp/(m3/h)25
    额定扬程H/m32
    额定转速n/(r/min)1450
    额定效率η/%52
    比转速ns34
    叶轮外径D/mm315
    叶片数Z5
    叶片包角$ \varphi $/(°)170
    前后密封环直径Dm/mm90
    前后密封环间隙b/mm0.25
    前后密封环长度L/mm15
    后泵腔轴向宽度b1/mm4
    平衡孔直径d/mm6
    平衡孔数z5
    下载: 导出CSV

    表  2  后密封环间隙进口压力和平衡腔压力的减小值

    Table  2.   Reduction value of rear seal ring clearance inlet pressure and balance cavity pressure

    切割方案压力减小值/kPa
    ${{ - } }\Delta {p_1}$${{ - } }\Delta {p_2}$
    方案一71
    方案二143
    方案三224
    方案一补偿113
    方案二补偿174
    方案三补偿276
    下载: 导出CSV
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  • 收稿日期:  2022-04-28
  • 网络出版日期:  2022-11-08

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