Design and Experimental Study of a Vehicle-Mounted Fertilizing and Spraying Machine

The objective of ecological restoration and rehabilitation of grasslands is to recreate the original appearance of damaged or degraded vegetation. From previous research, the pneumatic spraying technology is now more commonly used in the world for vegetation restoration. Pneumatic spraying is relatively inexpensive and causes little damage to the original vegetation, making it one of the most effective techniques for restoring natural grassland vegetation under natural climatic conditions. In this paper, the effect of the spraying machine pipe working airflow on the quality of spraying was studied through simulation analysis and experimental tests. The seeding area of the spraying machine corresponding to different values of the pipe inlet airflow speed was determined. The conclusions show that: 1) the spray pipe inlet airflow velocity has a great influence on the uniformity of spraying. When the airflow velocity is higher than 55 m/s, the spraying is not uniform, while the airflow velocity is lower than 45 m/s, the spraying amplitude is smaller, the operational efficiency is low, which is not conducive to the restoration of degraded grasslands; 2) considering the uniformity of spraying and operational efficiency, the airflow velocity at the inlet of the spray pipe should be between 45 and 55 m/s when the spraying machine is in operation. The seed drop area is changed, by adjusting the airflow velocity of the spray pipe inlet, and the reseeding and leakage area of the seed drop area is reduced, so that the spraying performance of the spraying machine is optimized.

Research on the Spray Cylinder Internal Flow Field and Its Influence on Spraying Quality of Forage Seed Spray Seeding Machine

Cao¹,

Guo²,

Fu³

et al. 2023

Study on the Uniformity of Spraying Seeds With 4bqd-40c Spraying Seeder Machine

Cao¹,

Guo²,

Fu³

et al. 2023

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.

Matlab-Based Design and Analysis of Small Rice Trans-Planter in Hilly Areas

WANG,

ZHOU,

et al. 2024

A small-scale paddy rice transplanter for hilly and mountainous areas faces issues such as few suitable machines, poor transplanting results, and low adaptability and efficiency of large transplanters in small fields. To address these problems, a four-row small-scale paddy rice transplanter was designed, driven by an engine with chain transmission. The machine structure mainly consists of a frame, engine, paddy field wheels, seedling tray, transplanting mechanism, reversing gearbox, and electromagnetic clutch, with a total weight of only 50 kg, facilitating transportation and operation. MATLAB was used for kinematic simulation and analysis of the transplanting mechanism, plotting displacement diagrams of the seedling needles and motion characteristic curves of the transplanting mechanism. ANSYS software was employed for finite element analysis of key components to ensure they meet operational requirements. Experimental studies were conducted with transplanting speed as the experimental factor, using floating rate and missing insertion rate as test indicators. Results showed that under specified transplanting conditions, the floating rate stabilized at around 2.9% and the missing insertion rate at approximately 4.8%. These findings indicate that the designed small-scale transplanter can effectively meet the requirements for rice transplanting operations in hilly areas.