1)silt abrasion泥沙磨损
1.Measures for improving turbine abrasion conditions are provided by analyzing silt abrasion mechanism and conditions in turbine.通过对水轮机泥沙磨损机理和磨损条件的分析 ,提出了改善水轮机磨损条件的措施 ,在二元理论基础上 ,对含沙河流中混流式转轮叶片设计方法进行了研究。
2.Based on the calculated liquid and solid phase velocity fields, the numerical simulation of silt abrasion on runner blade surfaces has been carried out.根据液相和固相三维流速场的计算结果数值模拟了转轮叶片面的泥沙磨损。
英文短句/例句
1.Research on Sand Slurry Abrasion Mechanisms of Dredging Conditions and New Wear-Resistant Materials;疏浚工况泥沙磨损机理及其耐磨新材料研究
2.When the axial flow turbine operates in sand loaded rivers, it frequently suffers the sand wear and abrasion.轴流式水轮机在含沙水流中运行时，常遭到泥沙磨损和磨蚀破坏。
3.Numerical Simulation of the Sandy Ablation of Centrifugal Pump Impeller Flowed Passage Parts in High Sandy Flow;含沙水流中离心式水泵过流部件泥沙磨损的数值模拟
4.Abstract: When the axial flow turbine operates in sand-loaded rivers,it frequently suffers the sand wear and abrasion.文摘:轴流式水轮机在含沙水流中运行时，常遭到泥沙磨损和磨蚀破坏。
5.When opration under high sediment flow condition, the turbine is often destroyed by abrasion and erosion of sediment.混流式水轮机在高含沙水流中运行时 ,常遭受泥沙磨损和磨蚀的破坏。
6.Research on the Combined Effect of Cavitation and Sand Abrasion under the Turbulent Coherent Structure;湍流拟序结构下的空蚀与泥沙磨损联合作用研究
7.The Designs of Sand-initiated Device and Researches of the Effects of Sand Characteristics on Abrasion;磨蚀泥沙起动装置的研制与泥沙特性对磨蚀影响的研究
8.Slurry shield cutter wear analysis of Nanjing Yangtze River Tunnel南京长江隧道泥水盾构刀具磨损分析
9.Research on the Coupling Characteristics of Anti-Erosive Wear of Desert Lizard;沙漠蜥蜴耐冲蚀磨损耦合特性的研究
10.Study of Sand-mud Abrasion, Cavitation Damage and Their Protections for the Turbines of the Sanmenxia Hydropower Station三门峡水电厂水轮机泥沙磨蚀及其防护的研究
11.Discussion on evaluation method for abrasion-corrosion failure of hydraulic turbine on heavy sediment-laden river多泥沙河流水轮机磨蚀失效评价的方法探讨
12.Discussions on the Abrasion Abatement Evaluation Method of Hydraulic Turbine in Sandy River多泥沙河流水轮机磨蚀失效评价方法的探讨
13.Research on Wear Mechanism and Temperature Field Feature of Cement Conveyor Chain;水泥输送链磨损机制及其温度场特性的研究
14.The effect of casing abrasion and cement sheath's defect position on casing stress套管磨损与水泥环缺陷位置对套管应力的影响
15.Use grinding-resist double mechanical seal. Reliable for sea water, muddy, waste water.采用耐磨性特强之双头机械轴封、耐海水、污水、污泥之磨损。
16.Biology Coupling Characteristics of Anti-erosive Wear of Desert Lizard's Skin沙漠蜥蜴体表抗冲蚀磨损的生物耦合特性
17.Measures for prevention of silt plug and abrasion in Xiaolangdi Hydro Project小浪底水利枢纽工程预防泥沙淤堵和磨蚀的工程措施
18.Vibrating roller compacts the earth until it can bear the weight of the base course and wearing surface that will rest on it.震动压路机将泥土压实，使其能承受上面的基层和磨损面的重量。
相关短句/例句
sand abrasion泥沙磨损
1.Elementary analysis of centrifugal pump impeller destruction due to cavitation and sand abrasion;离心泵叶轮汽蚀与泥沙磨损破坏浅析
2.Because of the special water quality, sand abrasion is a severe menace to the operate stability of the units in Xiaolangdi Hydropower Plant.由于小浪底电站特殊的水质条件，水轮机的泥沙磨损问题对小浪底的安全稳定运行构成了相当大的威胁。
3.Fluid machinery in these areas is damaged due to cavitation and sand abrasion, which has threaten directly the safety operation of hydraulic and hydroelectric engineering, causing huge economic losses.9m~3/s，黄河三门峡的年平均输沙量达16亿t，这些地区使用的泵、水轮机等许多流体机械都在夹沙水流的作用下，受到了沙粒磨损与空化剥蚀的联合破坏，这种破坏直接危害了水利水电工程的安全运行，造成了巨大的经济损失，因而对含沙水流条件下空化剥蚀与泥沙磨损联合作用进行研究有着很大的工程实际意义。
3)sand slurry wear泥沙磨损
1.Wear tests of 45 steel and high chromium cast iron were carry out by self-made simulating sand slurry wear test machine.在自制的模拟疏浚工况的立式泥沙磨损试验机上 ,对 4 5钢和含碳量分别为 2 %和 3%的高铬铸铁进行了泥沙磨损试验。
2.From different impact angles of worn surface,sand slurry wear experiment of high chromium cast iron was carried out taking 45 steel as the standard sample.以45钢作为标样,从不同磨损面冲击角对高铬铸铁进行泥沙磨损实验,根据材料性能、磨损实验结果及磨损形貌,分析和对比高铬铸铁和45钢泥沙磨损机理,阐述了高铬铸铁相对耐磨性比较高的原因,为高铬铸铁的抗击泥沙磨损设计提供一定的理论依据。
3.The standing sand slurry wear tester simulating the dredging condition was developed according to practical condition.研制了一种模拟疏浚工况的泥沙磨损试验机,通过试验确定该试验机最佳工况,试验机能够模拟挖泥船泥泵过流部件的磨损,快速获得磨损试验结果。
4)sand erosion泥沙磨损
1.In the beginning of 2006,three survey groups are founded to make the investigation of the sand erosion of the fourteen hydropower plants of China.2005年5月,国际电工委员会/水轮机技术委员会(IEC/TC4)成立工作组(WG29),着手编制水轮机泥沙磨损导则,由中国人任副召集人。
2.In the beginning of 2006,three survey groups is founded to make the investigation of the sand erosion of the fourteen hydropewer plants of China.2005年5月,国际电工委员会/水轮机技术委员会(IEC/TC4)成立工作组(WG29),着手编制水轮机泥沙磨损导则(Hydraulic Turbines,Guide For Dealing with Abrasive Enmion in water),由中国人任副召集人。
5)sand slurry abrasion test泥沙磨损试验
1.The position-exchange measuring method (PEMM) was put forward and studied in order to minimize the test errors in the sand slurry abrasion test.从减少泥沙磨损试验测试误差出发提出了换位测试法 。
6)sand slurry abrasion tester泥沙磨损试验机
1.The sand slurry abrasion tester with vertical multi clamps is sensitive to the variations in sand slurry concentration, impact angle of wear surface, materials and their properties, but not sensitive to the experimentation time.多头立式泥沙磨损试验机对泥沙浓度、冲击角和材料种类性质的变化敏感 ,对磨损时间不敏感 ,有良好的实验灵敏度 ,对材料的适用面宽 。
延伸阅读
水力机械泥沙磨损水力机械泥沙磨损wear of hydraulic machinery shLJ.l一l一x一el、lsho mosLJn水力机械泥沙磨损(wear of hydraulie ma-chinery)通过水轮机、水泵水轮机或蓄能泵等水力机械的大量较坚硬的悬移泥沙颗粒撞击和磨削过流表面材料，使其因疲劳和机械破坏而损坏的过程。 受泥沙磨损后，水力机械过流表面呈现的形态主要取决于水流绕流该部件的流动状态。一般磨损初期在过流表面出现沿水流方向的划痕或麻点，发展后出现沟槽状或波纹状痕迹，之后形成鱼鳞坑，严重时可造成过流部件穿孔。泥沙磨损破坏导致水轮机转轮、导叶、密封环、抗磨板等过流部件迅速损坏，效率急剧下降，甚至停机困难，使电站损失大量电能，被迫提前大修，造成人力、物力的大量损失。同时，水轮机过流部件被磨损后，将促进水流的局部扰动和空化的发展，进而使机组振动加剧。 影响泥沙磨损强度的因素主要有水流、泥沙和材质等3个方面: (1)水流特性。挟沙水流速度和方向是导致磨损的重要因素之一。一般认为磨损量与流速的三次方成正比;对金属材料.磨损量与水流冲角成正比。 (2)泥沙特性。包括含沙量、泥沙成分、硬度、颗粒大小和形状，含沙量愈大，泥沙愈硬如石英、揭铁矿、黄铁矿、石榴石等，粒径愈大、沙粒形状愈尖锐，磨损愈重。 (3)材质特性。包括流道材料成分、金相组织和硬度等一般以材料的耐磨系数划分耐磨性能好坏，如以ZG30的耐磨系数为l比较，ICrl8NigTi板材为1.2一1.8;ZGOCrl3Ni4Mo为1.2一2.0;ZOCr5Cu板材为2.0一3.0;堆642电焊条)4.0(耐磨l号)。 通常将水轮机泥沙磨损分为两类: (l)普遍磨损。磨损相对较均匀，面积较大.如水轮机转轮叶片表面的磨损多属此类。(2)局部磨损。由于过流部件表面不平顺的绕流引起的磨损，多表现为局部的凹坑或沟擂。 减轻泥沙磨损危害的途径主要有:①改善流道内水流流动状态，如在结构设计上尽量避免在过流表面出现凸凹不平或狭窄间隙，提高水力机械制造质童，提高过流表面光洁度等.②尽可能选用抗磨损性能好的材料制作过流部件或在过流表面易磨损部位采用抗磨损敷层。③合理选择机型和工作参数。例如.在高含沙t电站，可选择轴流式和混流式两种机型时，选择泥流式水枪机对减轻泥沙磨损危害较为有利;对过机含沙t较大的工程，不宜单纯强调水力机械的高性能指标;合理选择吸出商度，减弱或避免空性和泥沙磨损的共同作用.④结合电站工程，采用拦沙、沉沙、排沙等水工措施，合理确定取水口位t，尽量减少过机含沙量.避免推移质进人水轮机。
