• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2016, Vol. 52 ›› Issue (4): 178-184.doi: 10.3901/JME.2016.04.178

• 交叉与前沿 • 上一篇    下一篇

离心泵泵腔液体压力分布理论计算及验证

刘在伦1, 2, 张森1, 邵安灿3, 曾继来1   

  1. 1. 兰州理工大学能源与动力工程学院 兰州 730050;
    2. 兰州理工大学温州泵阀工程研究院 温州 325105;
    3. 普仑斯(福建)泵业有限公司 松溪 353500
  • 出版日期:2016-02-15 发布日期:2016-02-15
  • 作者简介:刘在伦,男,1961年出生,教授,博士研究生导师。主要研究方向为泵设计理论与测试技术。E-mail:liuzl88@sina.com;张森(通信作者),男,1990年出生,硕士研究生。主要研究方向为流体机械原理及测试技术。E-mail:972019288@qq.com
  • 基金资助:
    国家自然科学基金(51269010)和浙江省自然科学基金(LY12E09002) 资助项目

Theoretical Computation and Verification for Fluid Static Pressure in Centrifugal Pump Side Chamber

LIU Zailun1, 2, ZHANG Sen1, SHAO Ancan3, ZENG Jilai1   

  1. 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050;
    2. Engineering Institute of Wenzhou Pump & Valve, Lanzhou University of Technology, Wenzhou 325105;
    3. PRE(Fujian Pump Industry Co., Ltd., Songxi 353500
  • Online:2016-02-15 Published:2016-02-15

摘要: 准确描述泵腔液体压力分布是研究叶轮盖板力的核心研究问题,也是泵研究领域中的难题。建立泵腔液体流动模型并提出基本假设,将泵腔液体流动视为轴对称二维黏性层流运动,采用数量级比较法,对泵腔液体运动的Navier-Stokes方程简化,并进行积分求得Navier-Stokes方程的近似解析解,推导出设计工况下泵腔液体压力数学模型。在该数学模型计算中,引入势扬程修正系数,解决了泵腔入口液体压力的计算问题,并给出具体确定方法。以IS80-50-315型离心泵为研究对象,在不同叶轮平衡孔直径下,对设计工况下前后泵腔液体压力进行测试和理论计算,对比分析结果表明,两者结果较为一致。还采用2个典型的泵腔液体压力测试实例,进一步验证了设计工况下泵腔液体压力数学模型的可靠性。该研究成果是对经典泵腔液体压力计算公式的补充与完善。

关键词: Navier-Stokes方程, 计算与验证, 离心泵, 压力分布

Abstract: The accurate description of fluid pressure distribution in pump side chamber is the core research problem for the study of impeller shroud force and also is a problem in the research field of pump. The fluid flow model of pump side chamber is built and some assumptions are made. Based on which, the fluid flow can be regarded as a two-dimension axial-symmetric viscous laminar flow. By comparing orders of magnitude, the Navier-Stokes equations for fluid flow in pump side chamber are simplified. Then they are integrated to obtain the analytical solutions. Therefore, the mathematical model of fluid pressure is obtained on the design condition. The correction coefficient of potential head is introduced to the model, which solves the problem of the calculation for liquid pressure in pump side chamber inlet. And the determination method of which is also provided. The IS80-50-315 type centrifugal pump is taken as the research object. The fluid pressure in pump side chambers is tested and theoretical calculated with different balance-hole radius. The analysis result shows that the theoretical curves agree well with the experimental ones. In addition, the reliability of the mathematical model of fluid pressure is also further verified by two typical test cases. The research is the supplement and perfection for the classical calculation method of fluid pressure in pump side chamber.

Key words: centrifugal pump, computation and verification, Navier-Stokes equations, pressure distribution

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