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基于PWM技術(shù)的連續(xù)式變量噴霧裝置設(shè)計(jì)與特性分析
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    摘要:

    使用電磁比例調(diào)節(jié)閥，開(kāi)發(fā)了脈寬調(diào)制(PWM)連續(xù)式變量噴霧裝置，并研究了此種變量噴霧裝置的噴霧特性。結(jié)果表明：流量調(diào)節(jié)范圍較寬，平口扇形噴嘴的流量調(diào)節(jié)范圍達(dá)7∶1；當(dāng)減小占空比，以減小流量時(shí)，顯著改變了噴霧發(fā)散度，霧量分布明顯向中央集中，噴霧角變?。涣髁靠刂茖?duì)霧滴粒徑影響很小，隨著流量減小，霧滴粒徑稍有減小的趨勢(shì)。

    Abstract:

    A set of variable-rate continuous spray equipment was developed by using the proportional regulating solenoid valve based on pulse-width modulation (PWM) technology. The effects of this variable-rate spray equipment on spray characteristics were studied. It was concluded that the flow regulating range of this set was wide. The flow regulating range for the flat-fan nozzle was about 7:1. When the spray flow-rate was reduced through decreasing the duty cycle, the degree of spray dispersion was changed significantly. The spray distribution concentrated toward the center obviously and the spray angle became smaller. But the effects of the flow control on spray droplet diameter were slight. The spray droplet size decreased slightly with the flow decreasing.

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鄧巍,丁為民.基于PWM技術(shù)的連續(xù)式變量噴霧裝置設(shè)計(jì)與特性分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(6):77-80.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(6):77-80.

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