9WZCD-25型风送式喷雾机喷雾性能优化试验研究
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摘要
新疆天然草地面积辽阔,近年来,每年夏季的蝗灾发生面积都在230万hm2以上。给畜牧业生产造成极大的危害。大型超低量喷雾机以较高的杀灭速度和较好的经济性一直是最主要的灭蝗手段。我区从上个世纪70年末开始研制超低量喷雾机,由于以前忽视了对喷雾机的喷雾性能的研究,因此,农药的有效利用率很低,引起了环境污染和成本增加。在新疆农科院农业机械化所所承担的国家跨越计划项目《9WZCD-25型自走式超低量喷雾机的研制》的基础上,本文所做的主要工作是:①从理论上分析了雾滴破碎的机理和影响雾滴破碎的主要原因,以及影响喷幅的主要原因。②在理论分析的基础上对风筒结构进行了改进设计,为了提高喷雾机的喷幅,在风筒中增加了导流器。③通过试验检验喷雾机样机的喷雾性能,并提出对各项参数的优化设计方案。④通过正交试验和对比试验对雾滴取样,证明导流器的安装不仅增加了喷幅,而且还提高了雾滴均匀性系数。⑤根据大量试验的结果分析,找出了雾滴直径在喷幅方向上所呈现的变化规律,并提出了合理的喷幅范围。
There is wide natural grassland in Xinjiang . Acreage of locust disaster covers at least 2 , 300 , 000 hm2 in the summer during these years. It harms stock raising badly . Good-sized and ultra low volume sprayers are being used . which can attain a high velocity of prevention economically . Ultra low volume sprayers have been developed since 1978 . There has been a lack of study on spraying functions of sprayer previously . Pesticide is utilized inefficiently , Which has caused environment pollution and increased cost . In order to meet the demand of preventing large scale locust disaster in time, Good-sized & ultra low volume sprayers were developed . Main tasks of this thesis have been finished such as : Spraying functions of the sprayer were examined through a series of experiments, optimizing design was done with parameters. Causes that affects breaking up of droplets and spraying span were analyzed academically . The structure of air-blast pipe was improved on .An orienting object was installed based on theoretical analysis , that increase the spraying span .It has been found that both spraying span and droplets uniformity improved , by installing the orienting object .According to the results of a great number of experiments , orderliness of droplets diameter along the spraying span was researched ,and rational spraying span of air-assisted sprayer was suggested .
引文
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