冲蚀磨损对全射流喷头可靠性的影响  

Erosion wear effects on reliability of complete fluidic sprinkler

作　　者：李红[1] 陈超[1] 向清江[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《排灌机械》2008年第2期53-56,共4页Drainage and Irrigation Machinery

基　　金：国家农业科技成果转化基金资助项目(2006GB2C100098);国家"863"计划项目(2006AA100211)

摘　　要：阐述了全射流喷头射流元件主要磨损形式为冲蚀磨损.为了研究冲蚀磨损对全射流喷头可靠性的影响,定义了全射流喷头的三项失效指标:末端雨滴直径、步进频率和步进角度.完成了磨粒质量浓度为1%,2%和3%三种情况下的全射流喷头磨损试验,测试了喷头的主要水力性能参数,即喷头流量、喷头信号水流量以及末端雨滴直径随时间变化规律.试验结果表明:喷头的主要水力性能参数随着磨粒质量浓度的增加而显著增加,但质量浓度变化对水力性能参数的影响逐渐减小.信号接嘴1作为喷头的最易磨损件,可选用耐磨材料来加工,以提高喷头工作的可靠性.Erosion wear is the main abrasion to the jet element of complete fluidic sprinkler. In order to study the effects on the reliability of complete fluidic sprinkler by erosion wear, three failure indexes about complete fluidic sprinkler were defined as droplet diameter of the distal end of sprinkler, stepping frequency and stepping angle. A wear and tear test was conducted under the mass concentration of 1%, 2% and 3%. The hydraulic performances were studied in the test, including the changing rules with the time of flux of nozzle, the flux of signal tube and the diameter of droplet at the end of spray. The test resuits indicate that the extent of the change of hydraulic performance, droplet diameter of the distal end of sprinkler, stepping frequency and stepping angle, increase with the mass concentration, while the effects on hydraulic performance decrease gradually with the mass concentration. Signal Tube 1 is the wearing terrain, so it should be made with wear resistant material to increase the reliability of sprinkler.

关 键 词：全射流喷头 可靠性 冲蚀磨损 失效指标 水力性能 

分 类 号：S277.9[农业科学—农业水土工程]