3 results on '"TRANSPLANTERS"'
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2. 三移栽臂水稻钵苗移栽机构设计与试验.
- Author
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吴国环, 俞高红, 项筱洁, and 王林伟
- Abstract
Rice potted-seedlings transplanting is one kind of rice planting way, and it can increase the production and improve rice quality because it has the advantages of not hurting root and not needing recovering period. The rice pot seedling transplanting will have a good prospect in the future, but at present the application of rice pot seedling transplanting machine is less in China because there are defects for domestic transplanter with tossing transplanting such as uncontrollable seedling perpendicularity, complex structure, low efficiency and heavy vibration. Foreign rice potted-seedling planting technology is not suitable in China for complicated structure and high cost, and the key to improve the mechanization of rice planting is to research the rice potted-seedling transplanting mechanism suitable to China. Aiming to the above problems, a three-transplanting-arm rice potted-seedling transplanting mechanism of planetary gear train with non-circular gears and incomplete non-circular gear, which is applied in automatic rice potted-seedling transplanter, was designed. The mechanism consists of an incomplete non-circular gear, 3 pairs of conjugate non-circular gears and 3 planting arms, which can transplant seedlings 3 times a week. It means that under the same transplanting efficiency, it can reduce the transplanting spindle rotation, so as to reduce the vibration and improve the success rate of transplanting. Firstly, the shortcomings of the rotary transplanting mechanism with 2 transplanters were analyzed, and the design requirements were put forward. According to the requirements, the implementation plan was advanced. Then, the operation principle of rice potted-seedling transplanting mechanism was introduced, the mathematical expression in parametric form for the trajectory and the equations of non-circular gears and incomplete non-circular gears were derived, and the kinematic model of transplanting mechanism was established. A computer-aided analysis and optimization software of this kind of rice potted-seedling transplanting mechanism was developed with the Visual Basic 6.0. With the method of human-computer interaction based on visualization, the optimization design of the transplanting mechanism was carried out. Using this software, by tuning the design parameters, the influence of every parameter on the optimization object could be found out. The curve of non-circular gears was optimized and the structural parameters were obtained, which can satisfy the requirements of trajectory and attitude in the transplanting process for rice potted-seedling. The 3D (three-dimensional) model of transplanting mechanism was built and assembled in UG's entity modeling module. The virtual prototype was imported into Adams software after the interference checking of 3D model assembly was finished. According to the comparison between the virtual prototype simulation and the theoretical analysis of VB (Visual Basic), the trajectory of them was fundamentally consistent, so the correctness of the model of VB was verified, and the simulation results initially showed the design of mechanism was rational. In order to further verify the correctness of the design, the core components of transplanting mechanism were machined and assembled. Then, the physical prototype of the transplanting mechanism was developed to carry out the kinematics test in the test shelf. The results turned out that the static trajectory of the elastic tip of this transplanting arm and transplanting posture were basically consistent between the virtual prototype simulation and the physical prototype test, which proved the rationality and effectiveness of the parameters of transplanting mechanism. And the feasibility of this transplanting mechanism was verified. At the same time, the mechanism proposed solved the problem of seedling lodging and low transplanting success rate, and the efficiency of transplanting was improved. The research can provide a theoretical basis f [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
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3. Diseño, construcción y pruebas de un mecanismo de trasplante para plántulas de fresa de raíz desnuda, sobre suelo acolchado
- Author
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J.M. Cabrera, C. Gracia, R.J. Serwatowski, C. Gutiérrez, and N. Saldaña
- Subjects
Irrigation ,EQUIPMENT PERFORMANCE ,Agricultural engineering ,DESIGN ,PROTOTIPOS ,Botany ,BARE ROOT PLANTING ,TRASPLANTADORAS ,Transplanting ,CARACTERISTICAS DE LA MAQUINARIA ,ENSAYO DE MAQUINAS ,EQUIPMENT CHARACTERISTICS ,Mathematics ,TRANSPLANTERS ,PROTOTYPES ,PLANTACION A RAIZ DESNUDA ,Sowing ,Fragaria ,DESEMPENO DE LA MAQUINARIA ,FRAGARIA VESCA ,DISENO ,EQUIPMENT TESTING ,Mechanism (engineering) ,Soil water ,Agronomy and Crop Science ,Mulch ,Mechanization - Abstract
In order to reduce costs of hand-transplanting of strawberry crop, a transplanting mechanism (module) was designed, built and tested, as a main component of the transplanter for bare root plants on mulched soils, which design is carried on. The transplanter should be used with an existing irrigation system, that must be able to supply water by sections and allows to irrigate as soon as the transplanting operation finishes. The principle of operation of proposed machine is based on the transplanting module, which remains in a short contact with the ground and comprises mechanisms such as a cutter, a hook and a clamp to make automatically operations of cutting the plastic, hide the cut plastic and insert the plant in the ground. Relative movement between module and main frame of the transplanter is used as a sequential actuation source for its mechanisms. A prototype of the transplanting module and a testing device were built to evaluate the performance of the module main components in laboratory conditions. A 100% of plastic cuts made by the cutter were correct. Plastic hiding activity was satisfactory in 95% of repetitions. Placement of the plants by clamp, was satisfactory in 95% of the tests, that means a good plant insertion (crown covered by soil), and 85% of transplanted plants were correctly oriented. The module showed a satisfactory general performance, which allowed to prove the technical feasibility of the proposed concept as a principle of design of the transplanter for bare-root strawberry plants on mulch soil. Para reducir los costos del trasplante manual de la fresa, se diseña, construye y ensaya un mecanismo de trasplante (módulo) como componente principal de una trasplantadora de plantas a raíz desnuda sobre suelos acolchados, en fase de diseño. La trasplantadora se utilizaría en suelos con un sistema de riego sectorizado, que permita irrigar de forma inmediata al concluir el trasplante. El principio de funcionamiento de la máquina se basa en el módulo, que permanece en contacto con el suelo un tiempo determinado y que cuenta con los mecanismos, que de manera automática cortan y ocultan el plástico cortado e insertan la planta en el suelo. El movimiento relativo entre el módulo y el bastidor de la máquina se emplea como fuente de accionamiento secuencial de sus mecanismos. Se construyó un prototipo de módulo de trasplante y un dispositivo para ensayarlo, evaluándose el desempeño del los componentes principales del módulo. El 100% de los cortes de plástico realizados fueron correctos. La actividad de ocultar el plástico fue satisfactoria en 95% de los casos. La colocación de la planta por la pinza resultó correcta en 95% de los ensayos en cuanto a la posición de la planta en el suelo (enterrado de la corona), y en 85% en cuanto a la verticalidad de la misma. El módulo presenta un comportamiento satisfactorio en términos generales, comprobando la viabilidad técnica del concepto propuesto, como solución técnica para la construcción de la trasplantadora de plantas de fresa a raíz desnuda sobre suelo acolchado.
- Published
- 2009
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