转子槽形结构对离心泵水力特性及压力脉动影响研究

柴博; 董浩; 李文华

doi:10.13433/j.cnki.1003-8728.20220141

转子槽形结构对离心泵水力特性及压力脉动影响研究

doi: 10.13433/j.cnki.1003-8728.20220141

辽宁工程技术大学机械工程学院, 辽宁阜新 123000

基金项目:

辽宁省教育厅2019年服务地方类项目 300219074

详细信息

作者简介:
柴博(1980-), 副教授, 硕士生导师, 研究方向为流体机械, 286393103@qq.com

中图分类号: TG156
计量
- 文章访问数: 77
- HTML全文浏览量: 52
- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2021-10-18
- 刊出日期: 2022-07-25

Influence of Rotor Groove Structure on Hydraulic Characteristics and Pressure Pulsation of Centrifugal Pump

School of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China

摘要

摘要: 为提高航空领域小型高转速离心泵的水力性能, 减轻重量并简化机械结构, 且具备更好的轴向力平衡能力, 设计一种新型单级小比转数转子槽形结构离心泵。搭建离心泵水力性能实验台, 研究不同工况下槽形结构对离心泵水力性能及压力脉动的影响, 并结合数值模拟对比分析。研究表明: 转子槽形结构的离心泵与传统离心泵相比, 出口压力、扬程、有效功率分别提升了约7.89%、7.53%、11.1%。实验与数值模拟分析在额定工况下的出口压力、扬程、有效功率误差均小于1.5%, 临界空化余量为1.488 m, 压力脉动总体幅值小于0.2, 且峰值发生在了叶轮2倍频附近。验证了高速小比转数离心泵电机转子上引入螺旋槽结构设计是合理的。
- 离心泵 /
- 转子槽形结构 /
- 数值模拟 /
- 水力性能 /
- 压力脉动
Abstract: In order to improve the hydraulic performance of small high speed centrifugal pump in aviation field, reduce its weight and simplify its mechanical structure, and have better axial force balance ability, a new type of centrifugal pump with single stage small specific revolution rotor groove structure was designed. The hydraulic performance test bench of centrifugal pump was set up to study the influence of groove structure on hydraulic performance and pressure fluctuation of centrifugal pump under different working conditions, and the numerical simulation was compared and analyzed. The results show that compared with the traditional centrifugal pump, the outlet pressure, head and effective power of the rotor groove centrifugal pump are increased by 7.89%, 7.53% and 11.1%, respectively. The experimental and numerical simulation results show that the errors of outlet pressure, head and effective power are all less than 1.5%, the critical cavitation margin is 1.488 m, and the overall pressure pulsation amplitude is less than 0.2, and the peak value occurs near the impeller frequency twice. It is proved that it is reasonable to introduce spiral groove into rotor of high speed small specific revolution centrifugal pump motor.
- centrifugal pump /
- rotor groove structure /
- numerical simulation /
- hydraulic performance /
- pressure fluctuation

HTML全文

图 1 两种不同循环方式离心泵

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图 2 转子槽形结构离心泵泵体结构示意图

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图 3 两种不同型号离心泵流体域模型

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图 4 网格无关性验证

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图 5 转子槽形结构离心泵各流体域网格

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图 6 不同流量下原型泵叶轮中截面静压云图

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图 7 不同流量下传统离心泵叶轮中截面静压云图

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图 8 离心泵试验装置图

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图 9 额定工况水力性能实验与模拟对比

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图 10 传统型与转子槽形离心泵在额定工况下水力性能对比

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图 11 设计工况下泵空化性能曲线

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图 12 不同NPSH_a下的泵内空泡体积分布

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图 13 不同NPSH_a下的泵内静压分布

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图 14 监测点设置

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图 15 Q=220 L/h设计工况下各监测点压力脉动时域图

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图 16 设计工况下各监测点压力脉动频谱图

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表 1 不同过流部件网格数量

计算域	网格数/10⁵
转子流体域	5.29
叶轮流体域	7.68
蜗壳流体域	2.98
进口段流体域	0.86
交换孔流体域	2.84

下载: 导出CSV

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