李许杰,闫锋欣,胡凯,等. 肉鸡平养鸡舍自走式粪污清收装袋一体机研制[J]. 农业工程学报,2024,40(3):251-261. DOI: 10.11975/j.issn.1002-6819.202309039
    引用本文: 李许杰,闫锋欣,胡凯,等. 肉鸡平养鸡舍自走式粪污清收装袋一体机研制[J]. 农业工程学报,2024,40(3):251-261. DOI: 10.11975/j.issn.1002-6819.202309039
    LI Xujie, YAN Fengxin, HU Kai, et al. Design and test of the integrated machine for self-propelled manure collection and bagging in flat chicken coops[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2024, 40(3): 251-261. DOI: 10.11975/j.issn.1002-6819.202309039
    Citation: LI Xujie, YAN Fengxin, HU Kai, et al. Design and test of the integrated machine for self-propelled manure collection and bagging in flat chicken coops[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2024, 40(3): 251-261. DOI: 10.11975/j.issn.1002-6819.202309039

    肉鸡平养鸡舍自走式粪污清收装袋一体机研制

    Design and test of the integrated machine for self-propelled manure collection and bagging in flat chicken coops

    • 摘要: 针对肉鸡平养鸡舍粪污表层结饼、地面不平、清收量大等问题,该研究研制了可实现舍内粪污表层破碎、收集装袋和地面清扫等功能的自走式清粪装袋一体机。通过优选作业形式,结合功能需求和平养鸡舍尺寸,设计了整机关键机构的结构形式和工作参数;通过ANSYS/LS-DYNA模块仿真粪污破碎过程,分析了破碎过程中刀具的受力情况,当破碎力大于165.32 N时可实现粪污表层的破碎,刀具的仿真阻力均值与计算值的相对误差为1.10 %,刀具结构参数设计合理;利用ANSYS静力学模块和振动模态分析模块验证机架强度和稳定性。根据优化结果试制机样机,通过粪污清收预试验和舍内清收试验验证整机和清收效果。试验结果表明,机具行走速度为0.10 m/s、工作部件转速为240 r/min时,地面洁净率为95.38 %,清收速率为178.02 m2/h,满足肉鸡平养鸡舍粪污清收作业要求。研究成果可为肉鸡等地面平养畜禽的粪污清收装备研发提供理论指导和技术支撑。

       

      Abstract: Free-range raising in sheds can serve as one of the most crucial steps in the advancement of chicken farming into high-welfare farms. Among them, the composted chicken manure can be converted into valuable resources of organic fertilizer. There is a high demand for mechanized equipment to clean and collect the manure in flat chicken coops. However, various breeding conditions have also been hindered, including the uneven ground conditions within the flat chicken coops, the compact manure layers caused by chickens trampling, and the excessive workload associated with the manual collection of chicken manure. In this study, a novel integrated machine was presented with the self-propelled mode of surface crushing, collecting and bagging, as well as floor cleaning for the efficient management of chicken manure in flat coop environments. Firstly, a field test was conducted to obtain the dimensions of flat chicken coops, the distribution patterns of breeding equipment inside the coops, and material properties (such as thickness and moisture content after post-slaughter processing). Secondly, a crushing mechanism was designed to realize the continuous rotary tillage and crushing using a rotary blade. A folding mechanism was utilized to symmetrically transport through spiral blades. A fecal lifting mechanism was to pack the feces using a chain rake scraper, and a rolling brush mechanism was to clean the residual feces. The operation was finally optimized, according to the required functions of the integrated machine. The results showed that the crushing, collecting, and material lifting mechanisms cleared an area of 216, 280.56, and 280.98 m2/h, respectively. There was no blocking in the collection of the chicken manure, which fully met the design requirements of the entire machine. The crushing mechanism was continuously in contact with the manure layer during cleaning and collecting, which was the most prone component to wear and crack. ANSYS/LD-DYNA module was used to dynamically simulate the manure crushing, and then determine the force on the blade during crushing. The simulation results suggested that the hard layer on the surface of chicken manure was broken when the crushing force generated by the cutting blade was greater than 165.32 N. In addition, there was a 1.10 % relative error between the average simulated resistance of the blade and the empirical formula calculated value. The blade structure was also designed to verify the accuracy of the parameters in the simulation. Specifically, the rack was the core component carrying the working mechanism. The static and vibration mode analysis modules of ANSYS software were utilized to optimize the rack structure for cost-saving manufacturing. The strength and stability of the rack fully met the design requirements. Then, an integrated machine was prototyped with the self-propelled fecal cleaning and bagging. Finally, a series of experiments were carried out to validate the feasibility and collection efficiency of the entire machine. It was found that the flat ground feces were collected into the woven bags, and then the ground was cleaned after cleaning, which fully met the design requirements of the entire machine. Moreover, the rates of ground cleanliness and collection reached 95.38%, and 178.02 m2/h, respectively, when the walking speed of the entire machine was 0.10 m/s and the working component speed was 240 r/min. Better stability and efficiency were achieved in the mechanical operations for cleaning and bagging chicken manure in the flat chicken coops, compared with the single manual ones. At the same time, the finding can also provide theoretical guidance and technical support for the sweeping equipment of flat ground livestock and poultry manure.

       

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