排灌机械工程学报
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排灌机械工程学报  2011, Vol. 29 Issue (5): 401-405    DOI: 10.3969/j.issn.1674—8530.2011.05.007
泵理论与技术 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
BPX型排水泵内流分析及降噪方案
高  波1, 杨敏官1, 吴承福1, 谌志伟2
(1.江苏大学能源与动力工程学院, 江苏 镇江 212013; 2.常州雷利电机科技有限公司, 江苏 常州 213000)
Internal flow field analysis and noise reduction means of BPX drain pump
Gao Bo1, Yang Minguan1, Wu Chengfu1, Chen Zhiwei2
(1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Changzhou Leili Motor Science and Technology Co.Ltd., Changzhou,Jiangsu 213000, China)
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摘要 为了研究泵内流动诱导噪声源分布规律,从内部流动角度,运用计算流体动力学方法对一台典型的BPX型排水泵的内流场进行了数值计算,得到了在不同工况下泵内的速度、压力及涡量场分布特征.计算结果表明:泵过滤室内液流呈低速缓流状,异物过滤装置后盖板附近有环状非对称切向旋涡产生;过流通道面积突变使得叶轮吸入口入流条件较差;出液管内部流动出现明显的流动分离,由贯通流和低速回流区域组成;叶轮流道内部,特别是在叶轮轮毂周边及流道内靠近叶片背面附近,涡量分布密集,在叶尖附近也存在较强的涡量分布,出液管内有涡条带形成.同时,对模型泵进行了空气噪声测试,根据测试结果将泵运行过程划分为启动初期、正常运转期和空排期3个阶段,分析了各阶段的噪声特性,并提出了3种具有代表性的降噪方案,认为开设回流孔方案可行性较大.
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杨敏官
吴承福
谌志伟
关键词排水泵   内流分析   噪声测试   计算流体动力学   降噪     
Abstract: In order to research the distribution law of  noise sources induced by  flow in pumps, the internal flow field in a typical BPX drain pump was simulated by computational fluid dynamics, and the distribution features of velocity, pressure and vorticity field at different running conditions were obtained. The computational results show that there is a low velocity fluid flow in the filter chamber. An unsymmetrical tangential vortex is observed around the back of the filter. Pump impeller inflow condition goes to worse due to sudden change of the flow passage section area before fluid flowing into the impeller. Flow in the outlet pipe separates, and consists of throughout and backflow with low velocity. Vorticity is concentrated in the impeller flow passage, especially around the hub, suction side of the impeller and impeller tips. A vorticity band also appears in the outlet pipe. Meanwhile, pump airborne nosie was also tested. Pump running process was divided into three steps, including startup, running and empty pumping. Noise features of three steps were obtained. Three typical noise reduction means were provided. It is considered that the means of adding  backflow hole is more feasible.
Key wordsdrain pump   internal flow field analysis   noise test   computational fluid dynamics   noise reduction   
收稿日期: 2011-02-16; 出版日期: 2011-09-30
基金资助:

国家自然科学基金资助项目( 50776040) ; 江苏大学高级人才科研启动基金资助项目( 10JDG032)

通讯作者: 高 波( 1983-),男,江苏镇江人,讲师,博士( gaobo@ ujs.edu.cn),主要从事流体机械性能及多相流动研究.   
作者简介: 杨敏官( 1952-),男,江苏常州人,教授,博士生导师( mgyang@ ujs.edu.cn),主要从事流体机械性能及多相流动研究.
引用本文:   
高,波, 杨敏官等. BPX型排水泵内流分析及降噪方案[J]. 排灌机械工程学报, 2011, 29(5): 401-405.
GAO ,BO , Yang-Min-Guan et al. Internal flow field analysis and noise reduction means of BPX drain pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(5): 401-405.
 
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