邓巍,丁为民.基于PWM技术的连续式变量喷雾装置设计与特性分析[J].农业机械学报,2008,39(6):77-80.
.[J].Transactions of the Chinese Society for Agricultural Machinery,2008,39(6):77-80.
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基于PWM技术的连续式变量喷雾装置设计与特性分析   [下载全文]
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DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  变量喷雾  脉宽调制  电磁比例调节阀  喷雾特性
基金项目:
邓巍  丁为民
南京农业大学
中文摘要:使用电磁比例调节阀,开发了脉宽调制(PWM)连续式变量喷雾装置,并研究了此种变量喷雾装置的喷雾特性。结果表明:流量调节范围较宽,平口扇形喷嘴的流量调节范围达7∶1;当减小占空比,以减小流量时,显著改变了喷雾发散度,雾量分布明显向中央集中,喷雾角变小;流量控制对雾滴粒径影响很小,随着流量减小,雾滴粒径稍有减小的趋势。
Key Words:
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.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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