To address the challenges of low precision and suboptimal seeding efficiency in existing rapeseed seed metering wheels equipped with shaped grooves, the traditional rectangular grooves were redesigned into trapezoidal...To address the challenges of low precision and suboptimal seeding efficiency in existing rapeseed seed metering wheels equipped with shaped grooves, the traditional rectangular grooves were redesigned into trapezoidal forms to enhance overall seeding performance. Building upon this modification, a precision metering wheel featuring trapezoidal-shaped grooves capable of dispensing (3±1) seeds per hole was developed, and its fundamental structural parameters were established. Theoretical analysis combined with experimental validation identified four key factors influencing seed filling performance: the inclination angle of the seed guide shaped groove, the rotational speed of the metering wheel, the width of the trapezoidal groove, and the non-standard opening width. A response surface methodology was employed to examine the effects of these factors on the qualification rate, reseeding rate, and missed seeding rate. Results indicated that the qualified seeding rate was 94.17%, the reseeding rate was 3.92%, and the missed seeding rate was 1.91% under optimal parameters. Field tests confirmed that the device met the agronomic requirements for rapeseed sowing. This study serves as a reference for the design of precision sowing devices for rapeseed.展开更多
基金support for this work provided by the National Natural Science Foundation of China(Grant No.52065004 and Grant No.52365030)Lanzhou Municipal Young Talent Innovation Project(Grant No.2023-QN-146)+2 种基金Major Cultivation Project of Collegiate Scientific Research and Innovation Platform of Gansu Provincial Department of Education(Grant No.2024CXPT-15)Special Project of Gansu Provincial Commissioner for Science and Technology(Grant No.23CXGA0066)Gansu Agricultural Machinery R&D,Manufacturing and Promotion of Application in 2023 Integrated Pilot Project(3-3).
文摘To address the challenges of low precision and suboptimal seeding efficiency in existing rapeseed seed metering wheels equipped with shaped grooves, the traditional rectangular grooves were redesigned into trapezoidal forms to enhance overall seeding performance. Building upon this modification, a precision metering wheel featuring trapezoidal-shaped grooves capable of dispensing (3±1) seeds per hole was developed, and its fundamental structural parameters were established. Theoretical analysis combined with experimental validation identified four key factors influencing seed filling performance: the inclination angle of the seed guide shaped groove, the rotational speed of the metering wheel, the width of the trapezoidal groove, and the non-standard opening width. A response surface methodology was employed to examine the effects of these factors on the qualification rate, reseeding rate, and missed seeding rate. Results indicated that the qualified seeding rate was 94.17%, the reseeding rate was 3.92%, and the missed seeding rate was 1.91% under optimal parameters. Field tests confirmed that the device met the agronomic requirements for rapeseed sowing. This study serves as a reference for the design of precision sowing devices for rapeseed.
