Authors

Abstract

The working parameters of the pneumatic sprayer, such as the sprayer's attitude, working airflow, and spraying amount, have an impact on the evenness of seed distribution during the process of vegetation restoration on degraded grasslands . This article focuses on the 4BQD-40C pneumatic sprayer and analyzes the impact of the sprayer's forward speed, the airflow velocity at the sprayer's inlet, and the frequency of the sprayer's swinging nozzle on the spraying quality. The conclusion shows that: 1) the equation of the seed distribution trajectory of the sprayer was obtained, laying the foundation for subsequent research; 2) the swinging frequency of the nozzle is the key factor affecting the spraying quality of the sprayer, and the optimal swinging frequency of the nozzle corresponding to different forward speeds of the sprayer was obtained based on the established trajectory equation; 3) when the sprayer performs spraying operations with the optimized forward speed and swinging frequency, the trajectory of the sprayer's seed distribution was analyzed. It was found that when the nozzle swings at each optimal frequency, the trajectory of the seed distribution is the same, and the sum of the re-sprayed and missed areas in the seed distribution area is equal.

Abstract in Chinese

气力喷播机对退化草地进行植被修复的过程中，喷播机的工作参数，如喷播机姿态、工作气流和喷播量对喷播均匀性均有影响。本文以4BQD-40C型气力喷播机为研究对象，分析喷播机前进速度、喷筒入口气流速度及喷筒摆动频率对喷播质量的影响。结论表明：1）得到了喷播机的落种轨迹方程，为后续研究奠定基础；2）得出喷筒摆动频率是影响喷播机喷播质量的关键因素，依据建立的轨迹方程对喷播机不同前进速度对应的喷筒摆动频率进行了优化，得到喷播机不同前进速度对应的喷筒最优摆动频率；3）当喷播机以优化后的前进速度与摆动频率进行喷播作业时，对喷播机的落种轨迹进行了分析，发现喷筒在各个最优摆动频率摆动时，种子的落种轨迹相同，且此时在落种区域内，重播、漏播面积之和相等。