水泵的泥沙磨损问题是泵站运行管理过程中需要重点考虑的问题之一,在含沙水流冲刷作用下,水泵过流部件易产生明显磨损,从而缩短水泵的使用寿命,降低泵站的运行效率。以引汉济渭工程黄金峡水利枢纽为例,通过在水力机械磨蚀测试系统——旋转圆盘循环工位上进行泥沙磨损试验,探究磨损部件不同备选材料的泥沙磨损特性,结果表明:材料磨损深度随测点半径的增大而增大,泥沙中值粒径的大小对磨损的影响显著,磨损深度随泥沙中值粒径增大而增大。同时根据试验结果,构建了材料磨损率关系式,估算了备选材料的磨损量,比选出了合适的水泵母材。最终,基于研究成果提出了减小水泵泥沙磨损的措施建议,对减缓水泵磨损,降低泵站后期运行和维护费用具有重要意义。
Abstract
The abrasion of water pump by silt is a key problem to be considered in the operation and management of pump stations. Scoured by silt-carrying flow, the over-flow parts of water pump are subject to obvious abrasion, which shortens the service life of water pump and reduces the operating efficiency of pump station. With the Huangjinxia hydro-junction of Hanjiang-to-Weihe River Water Diversion Project as a case study, we investigated into the silt abrasion characteristics of different alternative materials for the wearing parts through sediment abrasion experiment on the hydraulic mechanical abrasion test system—rotary disc circulation station. Our findings demonstrated that the depth of material abrasion grew with the increase of measuring point’s radius. The median diameter of silt also had a significant effect on the abrasion, with the abrasion deepening with the increase of silt’s median diameter. Furthermore, we established the expression of abrasion rate based on the experimental results, hence estimating the abrasion amount of candidate materials, and finally determined the appropriate base material for water pump. In addition, we proposed some measures to alleviate the abrasion of water pump in the purpose of reducing the cost of operation and maintenance of pump station.
关键词
水泵 /
泥沙磨损试验 /
磨损评估模型 /
磨损率 /
黄金峡水利枢纽
Key words
water pump /
silt abrasion experiment /
abrasion evaluation model /
abrasion rate /
Huangjinxia hydrojunction
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参考文献
[1] LI Cheng-yi, YUAN Zheng, ZHANG Yu-quan, et al. Stability Optimization and Analysis of a Bidirectional Shaft Extension Pump[J]. Journal of fluids engineering, 2020, 142(7): 071203.
[2] MIAO Xiu-li, PAVESI G, CHEN Di-yi, et al. Flow Induced Noise Characterization of Pump Turbine in Continuous and Intermittent Load Rejection Processes[J]. Renewable Energy, 2019(139):1029-1039.
[3] 易艳林,陆 力.水轮机泥沙磨损研究进展[J].水利水电技术,2014,45(4):160-163.
[4] 李 娜,许建中,李端明.我国沿黄高扬程提灌泵站水泵站磨蚀问题及解决方案[J].中国农村水利水电,2013(8):178-180.
[5] 顾四行,杨天生.水机磨蚀研究与实践50年[M].北京:中国水利水电出版社,2005.
[6] SUGIYAMA K, NAKAHAMA S, HATTORI S, et al. Slurry Wear and Cavitation Erosion of Thermal-sprayed Cermets[J]. Wear Lausanne, 2005, 258(5/6): 758-775.
[7] PADHY M K, SAINI R P. Study of Silt Erosion Mechanism in Pelton Turbine Buckets[J]. Energy, 2012, 39(1): 268-293.
[8] QIAN Z D, WANG Z Y, ZHANG K, et al. Analysis of Silt Abrasion and Blade Shape Optimization in a Centrifugal Pump[J]. Journal of Power and Energy, 2014, 228(5): 585-591.
[9] 钱忠东,张 凯,王志远,等.双吸式离心泵叶片头部形状对泥沙磨损的影响[J].排灌机械工程学报,2014,32(2):103-107.
[10] 李 明.不同涂层下引黄水泵抗磨损的实验研究[J].中国农村水利水电,2014(9):109-111.
[11] 李浩平,李 峰,卞 雪,等.水轮机磨蚀试验设备的设计参数与总体设计[J].南水北调与水利科技,2015,13(6):1124-1127,1155.
[12] 卢金玲,张 欣,王 维,等.沙粒粒径对水力机械材料磨蚀性能的影响[J].农业工程学报,2018,34(22):53-60.
[13] 陆 力,刘 娟,易艳林,等.白鹤滩电站水轮机泥沙磨损评估研究[J].水力发电学报,2016,35(2):67-74.
[14] 陆 力,彭忠年,王 鑫,等.水力机械研究领域的发展[J].中国水利水电科学研究院学报,2018,16(5):442-450.
[15] 刘 娟,许洪元,齐龙浩.水力机械中冲蚀磨损规律及抗磨措施研究进展[J].水力发电学报,2005(1):113-117.
[16] 刘 娟,陆 力,朱 雷,等.冲击式水轮机过流部件泥沙磨损的试验研究[C]//第十九次中国水电设备学术讨论会论文集. 哈尔滨:黑龙江科学技术出版社,2013:424-428.
[17] 刘永红,张建乔,马建民,等.石油防砂割缝筛管的冲蚀磨损性能研究[J].摩擦学学报,2009,29(3):283-287.
[18] 卢 斌.喷射式冲蚀实验装置研制及油井管柱抗冲蚀性能研究[D]. 西安:西安石油大学, 2012.
[19] 王 勇,曾 涛,徐银香,等.固体颗粒对水力旋流器冲蚀磨损特性的影响[J].流体机械,2019,47(5):50-55,6.
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