| 叶片型线对渣浆泵水力性能及叶轮磨损特性的影响 |
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| 引用本文： | 李晶,张人会,郭荣,李仁年.叶片型线对渣浆泵水力性能及叶轮磨损特性的影响[J].排灌机械工程学报,2020,38(1):21-27. |
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| 作者姓名： | 李晶 张人会 郭荣 李仁年 |
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| 作者单位： | 兰州理工大学能源与动力工程学院,甘肃兰州730050;兰州理工大学能源与动力工程学院,甘肃兰州730050;甘肃省流体机械及系统重点实验室,甘肃兰州730050 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划（973计划）;甘肃省陇原创新人才计划项目 |
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| 摘 要： | 为研究叶片型线对渣浆泵水力性能及叶轮磨损特性的影响,以LC100/350型渣浆泵为研究对象,工质为石灰石浆液,在叶轮轴面及叶片进出口安放角等参数不变的条件下,采用对数螺旋线进行叶片型线控制,通过数值计算方法,采用离散相模型,分析渣浆泵叶轮叶片型线对其水力性能及磨损特性之间的关系.计算结果表明:采用变角螺线法设计的圆柱形叶片有利于提高水力效率,但将导致扬程的小幅降低;包角120°的叶型为设计空间水力性能最优叶型;不同的叶片型线条件下,渣浆泵的水力性能与其叶轮磨损特性相互制约;小包角的叶片导致泵的水力性能下降,但叶轮磨损强度相对较低;叶轮的磨损强度与固相浓度呈正相关关系,叶轮磨损最严重的部位位于后盖板靠近轮毂的区域;在大流量工况下叶片包角对叶轮磨损强度影响较额定工况及小流量工况显著得多,颗粒粒径的变化与颗粒浓度的变化对泵的水力性能及叶轮磨损特性的影响基本一致.
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| 关 键 词： | 渣浆泵 叶片型线 水力性能 磨损特性 |
| 收稿时间： | 2018-05-30 |
Influence of blade camber profile on hydraulic performance of slurry pump and impeller wear characteristic |
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| LI Jing,ZHANG Renhui,GUO Rong,LI Rennian.Influence of blade camber profile on hydraulic performance of slurry pump and impeller wear characteristic[J].Journal of Drainage and Irrigation Machinery Engineering,2020,38(1):21-27. |
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| Authors: | LI Jing ZHANG Renhui GUO Rong LI Rennian |
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| Institution: | 1. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou, Gansu 730050, China |
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| Abstract: | The slurry pump of type LC100/350 was used as a studied object to investigate into influences of blade camber profile on pump hydraulic performance and impeller wear characteristic in terms of limestone-water slurry as transported medium. A logarithmic spiral with variable angle was selected to parameterize the camber profile when the impeller meridional plan and blade inlet and outlet angles remain unchanged. The relationships of both hydraulic performance and wear characteristic with camber profile were analyzed numerically in Fluent 16.0 by using discrete phase model(DPM)model. The results show that the cylindrical blade designed by the logarithmic spiral method with variable angle can improve the pump hydraulic efficiency, but will lead to a slightly reduction in the head. The blade camber profile with wrap angle of 120° is the optimal one in four design cases proposed. The pump hydraulic performance and the impeller wear characteristic have been linked each other for the different camber profiles. A small wrap angle impairs the pump hydraulic performance but relieves the impeller wear. The impeller wear intensity is positively correlated with solid volumetric concentration, and the most severely worn regions on the impeller are in the area on the hub in front of the blade leading edges. The influence of blade wrap angle on impeller wear intensity at high flow rates is much more signi-ficant than under design condition and at low flow rates. The influences of solid particle size on hydraulic performance and impeller wear characteristic are basically consistent with those of solid concentration. |
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| Keywords: | slurry pump blade profile hydraulic performance wear characteristics |
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