Design and test of 4ZZ-4A2 full-hydraulic self-propelled jujube harvester

Wei Fu, Zhiyuan Zhang, Kai Ding, Weibin Cao, Za Kan, Junbing Pan, Yudong Liu

Abstract


The cultivated area of jujube in Xinjiang has increased rapidly in recent years. While the jujube harvest by hand has the shortage of high labor intensity, low efficiency and high labor cost, in addition, the harvesting machinery applying to dwarf and dense planting mode of jujubes is unavailable in Xinjiang. The 4ZZ-4A2 based on the full-hydraulic self-propelled jujube harvester was designed to solve the above problems. The harvester was mainly composed of a frame, a vibrating device, a jujube collecting and conveying device, an air separation device, a steering system, a hydraulic system and a jujube suction device and was capable of completing vibration, collection, conveying, cleaning and sundries removal work of jujubes through one step. The jujubes dropped on the ground were picked up at the same time. The AMESim simulation software was adopted to perform simulation analysis on the overall hydraulic system. The results showed that the speed of the vibrating motor was stable at about 650 r/min (the corresponding vibration frequency is 10.83 Hz) with the torque of 80 N·m, the speed of the conveyor motor was stable at 77 r/min with the torque of 77 N·m; the speed of the fan motor was stable at 54 r/min with the torque of 53.6 N·m; the speed of the walking motor fluctuated around 100 r/min with the torque of about 1000 N·m; the hydraulic steering system responded rapidly and could satisfy the actual working requirements of the jujube harvester. The jujube garden test results showed that the harvester could reach to the optimum harvesting effect when running at the speed of 0.5 m/s. Under such speed, the ground jujube picking rate was 45.1%, the tree jujube harvesting rate was 93.2%, the loss rate was 2.9%, and the damage rate was 0.9%. This study can provide theoretical basis and technical support for the jujube harvester.
Keywords: harvester, jujube, hydraulic simulation, dwarf and close planting, design
DOI: 10.25165/j.ijabe.20181104.3981

Citation: Fu W, Zhang Z Y, Ding K, Cao W B, Kan Z, Pan J B, et al. Design and test of 4ZZ-4A2 full-hydraulic self-propelled jujube harvester. Int J Agric & Biol Eng, 2018; 11(4): 104-110.

Keywords


harvester, jujube, hydraulic simulation, dwarf and close planting, design

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References


Fu W, Liu Y D, Kan Z, Pan J B, Cui J. Developing Status and Tendency of Orchard Pruning Machinery. Journal of Agricultural Mechanization Research, 2017; 10: 7–11. (in Chinese)

Whitney J D. Citrus harvest results with the air shaker concept. Fla. State Hort. Soc, 1972; 85: 250–254.

Whitney J D, Wheaton T A. Shakers affect Florida orange fruit yields and harvesting efficiency. Applied Engineering in Agriculture, 1987; 3(1): 20–24.

Hutton R J, Lill W J. Development of a mechanical harvesting system for citrus fruit. Proceedings of the International Society of Citriculture, 1982; pp.281–285.

Hedden S L, Churchill D B, Whitney J D. Trunk shakers for citrus harvesting, part II: tree growth, fruit yield and removal: Applied Engineering in Agriculture, 1988; 4(2): 102–106.

Blanco-Roldán G L, Gil-Ribes J A, Kouraba K, Castro-García S. Effects of trunk shaker duration and repetitions on removal efficiency for the harvesting of oil olives. Applied Engineering in Agriculture, 2009; 25(3): 329–334.

Sumner H R, Coppock G E, Churchill D B, Hedden S L. Shaker removal methods affect ‘Valencia’ orange yield. Proceedings of the Florida State Horticultural Society, 1979; pp.54–56.

Coppock G E, Grows A F, More M S. Harvesting ‘Valencia’ oranges with a limb shaker. Proceedings of the Florida State Horticultural Society, 1971; 11: 84–88.

Mann D D, Petkau D S, Crowe T G, Schroeder W R. Removal of sea buckthorn (Hippophae rhamnoides L.) berries by shaking. Canadian Biosystems Engineering, 2002; 43(2): 23–28.

Peterson D L. Mechanical harvester for process oranges. Applied Engineering in Agriculture, 1998; 14(5): 455–458.

Peterson D L, Taketa F. Feasibility of mechanically harvesting fresh market quality eastern thorn less blackberry. Applied Engineering in Agriculture, 2003; 19(1): 25–30.

So J D, Choi S H. Mechanical rubus coreanus miquel harvester. American Society of Agricultural and Biological Engineers, 2008; 2: 1127–1141.

So J D, Cho J W. Design considerations and feasibility of a prototype mechanical bokbunja (Rubus coreanus Miquel) harvester. American Society of Agricultural and Biological Engineers, 2010; 3: 2567–2584.

Lee S W, Huh Y K, So J D. Mechanical jujube (zizyphus jujube miller) harvester．CSAE/SCGR 2003 Meeting Montréal, 2003, Nov. 6–9.

Tang Z H, Shen C J, Meng X J, Jia S X, Zhou Y, Zheng X. Development of 4YS-24 jujube harvester. Xinjiang Agricultural Mechanization, 2010; 1: 30–32. (in Chinese)

Shi G K, Ma S H. Design and test of air suction jujube harvester. Journal of Agricultural Mechanization Research, 2014; 2: 25–53. (in Chinese)

Zoltán Láng. Dynamic modelling structure of a fruit tree for inertial shaker system design. Biosystems Engineering, 2006; 93(1): 35–44.

Hu R, Huang B, Li S. Simulation analysis about swing system of concrete pump based on AMESim. Machine Tool & Hydraulics, 2015; 43(9): 169–172. (in Chinese)

Zeng X F. Characteristic analysis and control strategy of hydraulic drive system of Y32-315T forging press. Central South University, 2012. (in Chinese)

Wang Y, Hu J W, Luan Z Y, Zhou D R. Fault Diagnosis of a Certain Type Equipment Pitch Channel Based on AMESim Hydraulic Simulation and Test Platform. Hydraulics Pneumatics & Seals, 2016; 12: 42–45. (in Chinese)

Li J L, Hu Z Y, Guo Y K. Simulation Research of Flow Divider-combiner Based on AMESim. Mechanical Engineer, 2017; 8: 63–64. (in Chinese)




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