Design and test of vibratory harvesting actuator for <i>Camellia oleifera</i> fruits

FAN Zhiyuan; TANG Jingyu; KOU Xin; WANG Dong; QU Zhenxing

doi:10.7671/j.issn.1001-411X.202402019

Journal of South China Agricultural University > 2025 > 46(2): 265-277. > DOI: 10.7671/j.issn.1001-411X.202402019

FAN Zhiyuan, TANG Jingyu, KOU Xin, et al. Design and test of vibratory harvesting actuator for Camellia oleifera fruits[J]. Journal of South China Agricultural University, 2025, 46(2): 265-277. DOI: 10.7671/j.issn.1001-411X.202402019

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Design and test of vibratory harvesting actuator for Camellia oleifera fruits

Harbin Institute of Forestry Machinery/Key Laboratory of Forestry Mechanical Engineering, National Forestry and Grassland Administration, Harbin 150086, China

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Received Date: February 27, 2024
Available Online: January 15, 2025
Published Date: January 09, 2025

Graphical Abstract

Abstract

Abstract

Objective
In order to improve the removal rate and harvesting efficiency of Camellia oleifera fruits, a vibratory C. oleifera fruit harvesting actuator was designed for the C. oleifera forest in the hilly area of southern China.
Method
The design of harvester head, harvester arm and hydraulic control system for the harvesting actuator of CZC40RY C. oleifera fruit harvester was completed. The vibration system mechanical model of vibration device-C. oleifera tree and the single pendulum dynamic model of C. oleifera fruit-C. oleifera branch were established. COMSOL and ANSYS softwares were used to complete the free mode response and harmonic response analysis of the 3D model of C. oleifera tree. The Box-Behnken test method was used to determine the optimal operating parameters of the harvesting actuator with vibration frequency, amplitude and vibration time as the test factors, and the removal rate and flower drop rate as the test indexes.
Result
The vibration frequency and the main factors affecting the amplitude were determined when the tree was subjected to the simple harmonic exciting force, and the shedding acceleration of C. oleifera fruits was 947.63 m/s², and the frequency range of the vibration device was 15−25 Hz.The harvesting test of C. oleifera forest verified that when the vibration frequency was 21 Hz, the amplitude was 10 mm and the vibration time was 10 s, the average removal rate of the harvesting actuator was 95.5%, and the flower drop rate was 2.1%. Through comparative analysis of the harvesting parameters with vibratory C. oleifera fruit harvesters, there were obvious differences in the shedding frequency, size and maturity of C. oleifera fruits in different regions, different varieties and even the same C. oleifera tree. The divide order vibration harvesting method was proposed, and the vibration frequency-vibration time relationship diagram was given.
Conclusion
The harvesting actuator can meet the mechanical harvesting needs of C. oleifera fruits.
- Camellia oleifera fruit,
- Harvesting actuator,
- Divide order vibration,
- Harvesting parameter

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References (34)

References

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Design and test of vibratory harvesting actuator for Camellia oleifera fruits