Optimization of the spray boom structure and field operational performance of an ultra-wide cotton topping machine

doi:10.14088/j.cnki.issn0439-8114.2025.11.025

Abstract

Abstract: The structural characteristics and operational requirements of the 3WPZ-500 self-propelled ultra-wide cotton topping machine were systematically analyzed. A structural model of the spray boom was constructed based on Solidworks software, and the mechanical properties of the spray boom structure were simulated and analyzed using the ABAQUS finite element method. Its operational performance was verified through field tests.The results showed that the ultra-wide double-link spray boom suspension design improved the field working efficiency and environmental adaptability of the topping machine. Stress analysis of the finite element model of the frame structure revealed that the maximum stress (34.2 MPa) occurred at the fifth connecting plate (Zone III), an area with complex forces and high internal loads. This value was significantly lower than the yield strength (345.0 MPa) of the Q345B steel used for the spray boom, indicating that the main structure of the spray boom met the design strength requirements. The ultra-wide cotton topping machine demonstrated high efficiency and effectiveness in chemical topping. After the Y₂ treatment (spray volume of 20 L/667 m² with air-assisted delivery), key growth indicators of cotton plants were significantly optimized. Parameters such as plant height, number of fruit branches, and height of the top three leaves/petiole length indicated uniform and robust plant growth, with the number of bolls per plant reaching 9.33. This indicated that the Y₂ treatment effectively suppressed vegetative growth while promoting high cotton yield and increased profit.

Key words: cotton topping machine, ultra-wide, spray boom structure, field, operational performance, optimization, validation

CLC Number:

ZHANG Shuang-xia, WANG Jia, LIU Sheng-chong, TIAN Duo-lin, LIU Xin-jun, QIN Guang-quan. Optimization of the spray boom structure and field operational performance of an ultra-wide cotton topping machine[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(11): 182-188.

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