https://doi.org/10.4081/jae.2022.1254

Theoretical transmission analysis to optimise gearbox for a 2.6 kW automatic pepper transplanter

Vol. 53 No. 4 (2022)
    Published: 3 November 2022
    Agricultural machinery, gearbox, pepper transplanter, power transmission, spur gear.
    Abstract Views: 1228
    PDF: 322
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    Authors

    Md Nafiul Islam
    Department of Biosystems Engineering and Soil Science, College of Agricultural Sciences and Natural Resources, University of Tennessee, Knoxville, TN, United States.
    Md Zafar Iqbal
    Department of Biological and Agricultural Engineering, College of Agriculture and Life Sciences, Texas A&M University, College Station, TX, United States.
    Mohammod Ali
    Department of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon, Korea, Republic of.
    Milon Chowdhury
    Department of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon, Republic of Korea; Department of Smart Agricultural Systems, Graduate School, Chungnam National University, Daejeon, Korea, Republic of.
    Shafik Kiraga
    Department of Smart Agricultural Systems, Graduate School, Chungnam National University, Daejeon, Korea, Republic of.
    Md Shaha Nur Kabir
    Department of Agricultural and Industrial Engineering, Faculty of Engineering, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.
    Dae-Hyun Lee
    Department of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon, Republic of Korea; Department of Smart Agricultural Systems, Graduate School, Chungnam National University, Daejeon, Korea, Republic of.
    Jea-Keun Woo
    National Institute of Agricultural Science, Rural Development Administration, Jeonju, Korea, Republic of.
    Sun-Ok Chung
    sochung@cnu.ac.kr
    Department of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon, Republic of Korea; Department of Smart Agricultural Systems, Graduate School, Chungnam National University, Daejeon, Korea, Republic of.

    A gearbox is an essential component of an automatic transplanter to transmit engine power to the transplanter components. It is necessary to find the appropriate gearbox dimensions and materials for the pepper transplanter to minimise transmission losses. Therefore, the objectives of this research were to simulate the power transmission efficiency of the gearbox and to determine a suitable number of stages, materials, and the dimensions of the spur gears. A 2.6 kW gasoline engine was considered as the prime source to power the entire transplanter. The available maximum length between the engine and transplanter subsystem was 422 mm. Considering design issues, a simulation model was created to determine the efficiency of the pepper transplanter gearbox, including various types of mechanical losses in the gearing system. Three different modules (1, 2, and 3 mm) and two materials were used to evaluate the effects on transmission. The analysis results indicated that the gearbox transmission efficiency levels of seven to twelve stages were in the range of 93.0–98.7%, whereas the eight-stage gearbox yielded a maximum efficiency of 98.7%, more significant than the target efficiency of 98.0%. Therefore, an eight-stage gearbox was selected for power transmission to the components. The power transmission simulation results showed that the overall efficiency from the engine to the transplanting mechanism shaft varied in a range of 95.2-95.9% owing to contact of the gear meshes. The analysis results also indicated that the 25CrMo4 carbon steel material with a 2-mm module gear was appropriate for the pepper transplanter. Therefore, the analysis in this paper can be used as a reference in the design of pepper transplanter gears and gearboxes with suitable material properties to provide the desired efficiency.

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    How to Cite

    Islam, M. N. (2022) “Theoretical transmission analysis to optimise gearbox for a 2.6 kW automatic pepper transplanter”, Journal of Agricultural Engineering, 53(4). doi: 10.4081/jae.2022.1254.
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