射流脉冲喷头驱动板结构优化对喷头性能的影响研究

A Study on the Influence of the Structure Optimization of Driving Plate of Jet Feedback Nozzle on Its Hydraulic Performance

目前缺乏对射流脉冲喷头流道结构的整体优化和基于喷洒特点的驱动结构设计与研究。为解决这一问题,推动该型国产喷头产业化进程与后续系列喷头开发,对射流脉冲喷头进行了整体结构优化设计,并针对影响射流脉冲喷头转动和水量分布较大的驱动板结构进行了首创设计与试验研究,解决了驱动机构复杂,弹簧易腐蚀老化的缺陷。同时驱动板结构是影响射流脉冲喷头水力性能的关键因素之一,而当前缺少基于喷洒特点的驱动结构设计与研究,因此,采用四因素三水平水力性能试验与验证相结合的方法,提出“爪形”驱动板结构。正交试验结果表明:“爪形”驱动板各结构因素对射流脉冲喷头喷灌均匀度影响主次顺序为三角形挡板底宽、驱动板长度、驱动板倾角、驱动板宽度;最优结构为三角形挡板底宽7 mm、驱动板长度18 mm、驱动板倾角14°、驱动板宽度11 mm。

At present,there is a lack of overall optimization of the flow channel structure of the jet pulse nozzle and the design and research of the driving structure based on the spraying characteristics.In order to solve this problem and promote the industrialization process of this type of domestic nozzle and the development of subsequent series of nozzles,in this paper,the overall structure optimization design of the jet pulse nozzle was carried out,the driving plate structure affecting the rotation and water distribution of the jet pulse nozzle was first designed and tested,and the defects of complex drive mechanism and easy corrosion aging of spring was solved.The driving plate structure is the key factors affecting the hydraulic performance of the jet pulse sprinkler.While at present,there is a lack of drive structure design and research based on spray characteristics.In this paper,a"claw-type"drive plate structure was proposed through the combination of four factors and four levels of hydraulic performance test and verification.The orthogonal test was carried out,and the results showed that the primary and secondary order of the influence of the structural factors of the"claw"driving plate on the spraying uniformity of the jet pulse sprinkler was as follow:the bottom width of the triangular driving plate,the length of the driving plate,the inclination angle of the driving plate,and the width of the driving plate.The optimal structure is as follows:the bottom width of the triangular drive plate is 7 mm,the length of the drive plate is 18 mm,the inclination angle of the drive plate is 14°,and the width of the drive plate is 11 mm.