摘要
在下注水反冲式水马达装置满足整机喷洒均匀性和塔架车田间通过能力的前提下,对其动力性能和水力性能进行了研究。建立了单跨水动圆形喷灌机反冲式水马达驱动力矩、转速和工作流量的计算模型,分析了影响水马达驱动扭矩和转速的因素。研究结果表明:通过改变水马达工作压力调控转速实现所需灌水深度的方法比增大喷嘴直径来增加水马达工作流量和加长旋转臂长度更有效、操作性更强;水马达结构及水力设计必须与整机通过性能和喷洒均匀性优化组合,才能满足整机通过性能要求,并使整机喷洒均匀系数符合农业灌溉要求。
In order to meet the reqirements of sprinkler irrigation uniformity and tower travelling capacity of a single-span center pivot irrigation system, the dynamics and hydraulic characteristics of the centrifugal water motor with a lower injector port were investigated.Relevant formulas were established for computing driving torque,speed and operating flow rate.The key factors affecting the driving torque and rotation speed of centrifugal water motor were analyzed.The results showed that the irrigated water depth could be adjusted more effectively by changing the working pressure of the water motor to control the rotation speed than by increasing the diameter of sprinkler nozzle to increase the work flow of water motor or by extending the length of the rotating arm.It is necessary to consider the structural and hydraulic designs of centrifugal water motor,travelling capacity and sprinkler irrigation uniformity of center pivot irrigation system simultaneously and optimize their combinations.In this way the demands of system traveling capacity and agricultural irrigation uniformity could be met at the same time.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第4期152-156,116,共6页
Transactions of the Chinese Society for Agricultural Machinery
基金
科技部农业科技成果转化资助项目(2010GB2T010708)
科研院所技术开发研究专项资金资助项目(NCSTE-2007-JKZX-163)
关键词
单跨圆形喷灌机
反冲式水马达
水力性能
喷洒均匀性
Single-span center pivot irrigation system
Centrifugal water motor
Hydraulic performance
Sprinkler irrigation uniformity
