排灌机械工程学报
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排灌机械工程学报  2014, Vol. 32 Issue (8): 658-662    DOI: 10.3969/j.issn.1674-8530.13.1011
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微型旋涡泵水力特性与轴向力计算
张菲茜1, 武鹏1, 吴大转1, 王乐勤1, 张辉平2
1.浙江大学化工机械研究所, 浙江 杭州 310027; 2.宁波洛卡特汽车零部件有限公司, 浙江 宁波 315318
Hydraulic characteristics and axial force of micro vortex pumps
Zhang Feixi1, Wu Peng1, Wu Dazhuan1, Wang Leqin1, Zhang Huiping2
1.Institute of Process Equipment, Zhejiang University, Hangzhou, Zhejiang 310027, China; 2.Ningbo Rocket Automobile Parts Co. Ltd., Ningbo, Zhejiang 315318, China
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摘要 对新结构闭式叶轮旋涡泵进行数值模拟,采用RANS湍流模型求解三维不可压缩问题,计算了旋涡泵的水力特性,分析了旋涡泵工作时叶轮与泵壳间隙处油膜对叶轮的轴向承载机理,并进一步讨论了叶轮两侧的楔形槽对油膜承载能力的影响.结果表明:旋涡泵的水力特性与试验数据趋势吻合,数值相近,验证了仿真计算的可靠性.轴向力分析显示,旋涡泵工作时浮动叶轮的轴向支撑由在叶轮两侧形成的油膜实现,油膜因厚度不同,造成径向的压力降不同,油膜较薄则泄压慢,油膜较厚则压力更均匀,叶轮上下表面受力不等而产生支撑力,而楔形结构能够产生附加的支撑力,强化了支撑效果.研究结果对旋涡泵的设计和研究提供参考依据.
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张菲茜
武鹏
吴大转
王乐勤
张辉平
关键词微型旋涡泵   水力特性   油膜   轴向力   数值模拟     
Abstract: Numerical simulation of a new shrouded impeller vortex pump was carried out. The method of solving steady three-dimensional incompressible continuity equation and RANS equations were employed to calculate the hydraulic performance of the vortex pump. The axial bearing mechanism of the oil film toward the impeller was analyzed, and further discussion about the influence of the wedge shaped groove on both sides of the impeller on the bearing capacity of the oil film was made. It was found that the predicted hydraulic property was consistent with test data, which proves the calculating model reliable. In addition, the results show that the axial supporting of floating impeller is rely on the oil film formed on both side of the impeller. The different thickness of oil film results in different radial pressure drops. The thinner one results in the slow pressure drop while the thicker one results in the uniform pressure, which causes an unequal force on impeller and provides the holding power. More-over, the wedge shaped structure enhances the supporting effect. The study is useful for the design and analysis of vortex pumps.
Key wordsvortex pump   hydraulic characteristics   oil film   axial force   numerical simulation   
收稿日期: 2013-12-10;
基金资助:

国家自然科学基金资助项目(51276213)

通讯作者: 张菲茜(1990—),女,福建宁德人,硕士(21228021@zju.edu.cn),主要从事流体机械理论与优化设计研究.   
作者简介: 吴大转(1977—),男,浙江温州人,副教授(通信作者,wudazhuan@zju.edu.cn),主要从事流体机械优化与控制工程研究.
引用本文:   
张菲茜,武鹏,吴大转等. 微型旋涡泵水力特性与轴向力计算[J]. 排灌机械工程学报, 2014, 32(8): 658-662.
ZHANG Fei-Qian-,WU Peng-,WU Da-Zhuan- et al. Hydraulic characteristics and axial force of micro vortex pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(8): 658-662.
 
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