摘要
为了研发一种适用于经济林灌溉的大流量压力补偿式灌水器,利用Pro/E软件完成了灌水器的三维造型,并利用激光快速成型制作出了灌水器样件,通过正交试验研究了灌水器垫片厚度、垫片硬度和基座下腔高度等补偿区结构参数对灌水器补偿区内的流态指数和额定流量(压力补偿区内的平均流量)的影响顺序及影响显著性.结果表明,下腔高度对起调压力及额定流量影响显著、垫片硬度和厚度对起调压力及额定流量影响不显著;垫片厚度对灌水器流态指数影响显著,下腔高度和垫片硬度对流态指数影响不显著;结构参数最优组合为:垫片厚度为1.3 mm,垫片硬度为50°,下腔高度为4 mm;补偿区结构参数为此组合时,灌水器补偿区间为50~400 kPa,流态指数为0.055 1,额定流量为13.10 L/h.该研究结果可为大流量压力补偿式灌水器的开发提供一定的科学依据.
In order to develop a new kind of large flow pressure compensation emitter for economic forest,taking the advantage of Pro/E,the three-dimensional model of the emitter was completed,and the rapid laser-molding was used to manufacture the emitter.To analyze the effect of important structural parameters on hydraulic performance such as exponent and flow of pressure compensation emitter with large flow,diaphragm thickness,diaphragm hardness and foundation height were studied based on the orthogonal test.The results show that:foundation bed height and pressure compensating range have related correlation;diaphragm thickness has the largest influence on flow exponent,followed by foundation bed height and diaphragm hardness.Diaphragm thickness has the largest impact on flow q,followed by diaphragm hardness and foundation height.Large flow pressure compensating emitter with the best hydraulic performance is optimized with the structural parameters as follows:a thickness of 1.3 mm,a hardness of 50° and a height of 4 mm.This kind of emitter has pressure compensating ranges from 50 kPa to 400 kPa,while flow exponent is 0.055 1,and flow q is 13.10 L/h.
出处
《排灌机械工程学报》
EI
北大核心
2013年第12期1083-1088,共6页
Journal of Drainage and Irrigation Machinery Engineering
基金
"十二五"国家科技支撑计划项目(2011BAD29B02)
农业科技创新专项(Z109021207)
教育部
国家外国专家局"111"计划项目(B12007)
关键词
灌水器
压力补偿
水力性能
流量
结构参数
emitter
pressure compensating
hydraulic performance
flow rate
structural parameter
