排灌机械工程学报
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排灌机械工程学报  2014, Vol. 32 Issue (2): 108-112    DOI: 10.3969/j.issn.1674-8530.12.0223
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外啮合齿轮泵流量特性影响因素分析
孔繁余1, 何玉洋1, 郑德2, 张慧1, 夏斌1
1.江苏大学流体机械工程技术研究中心, 江苏 镇江 212013; 2.中国石化仪征化纤股份有限公司, 江苏 扬州 211900
Analysis of influence factors on flow rate characteristics in gear pump
Kong Fanyu1, He Yuyang1, Zheng De2, Zhang Hui1, Xia Bin1
1.Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Sinopec Yizheng Chemical Fibre Co. Ltd., Yangzhou, Jiangsu 211900, China
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摘要 为研究外啮合齿轮泵重要参数对流量脉动系数的影响,通过理论推导获得流量脉动系数计算公式,分析齿数、压力角对流量脉动系数的影响;采用边界型函数和动网格技术,并结合k-ε湍流模型对不同参数条件下的齿轮泵进行非定常模拟,分析负载压力、径向间隙对流量脉动系数的影响.结果表明,增大齿数和压力角均会减小齿轮泵流量脉动系数,有利于提高齿轮泵的流量特性.另外,增大齿数与增大压力角对提高齿轮泵的流量特性效果较为接近;齿轮泵的流量脉动系数也会随着负载压力及齿轮径向间隙的增大而减小,在设计中适当增大负载压力及齿轮径向间隙,可以改善出口流量特征的质量;过大的负载压力和齿轮轴向间隙会导致齿轮泵容积效率下降,在设计过程中应当引起足够重视.
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孔繁余
何玉洋
郑德
张慧
夏斌
关键词齿轮泵   流量特征   脉动系数   影响因素     
Abstract: In order to research the important influence factors of the coefficient of the flow rate pulsation φ on the external gear pump, the analytic way of deducing and simulation was adopted. By deducing the formulation of the coefficient of flow rate pulsation, the relationship between gear number, press angle and φ were analyzed. A numerical simulation of the transient flow field of the gear pump was performed by using the moving boundary condition and dynamic mesh method with k-ε turbulent model, and the relationships among the loading pressure,the clearance and the φ were achieved. The result shows that the coefficient of flow rate pulsation will decrease with the increasing of the gear number z or the pressure angle α. It is good for improving the flow rate characteristic of the gear pump. Furthermore, the gear number makes a very similar function in improving the flow characteristics with the pressure angle′s function. On the other hand, the coefficient of the flow rate pulsation will also decrease with the loading pressure p or the clearance δ increasing. The exaggerated loading pressure and clearance δ will lead to the volumetric efficiency decreasing, and this characteristics should be attached great importance in pump design procedure.
Key wordsexternal gear pump   flow characteristic   flow rate coefficient pulsation   influence factors   
收稿日期: 2012-12-17;
基金资助:

“十二五”国家科技支撑计划项目(2013BAK06B02);江苏省科技支撑计划项目(BE2012147)

通讯作者: 孔繁余(1956—),男,江苏扬州人,研究员,博士生导师(Kongfy2918@sohu.com),主要从事流体机械研究.   
作者简介: 何玉洋(1989—),男,江苏盐城人,硕士研究生(839012147@qq.com),主要从事容积泵研究.
引用本文:   
孔繁余,何玉洋,郑德等. 外啮合齿轮泵流量特性影响因素分析[J]. 排灌机械工程学报, 2014, 32(2): 108-112.
KONG Fan-Yu-,HE Yu-Yang-,ZHENG De- et al. Analysis of influence factors on flow rate characteristics in gear pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(2): 108-112.
 
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