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Experiment and optimal design of a collection device for a residual plastic film baler

Frontiers of Agricultural Science and Engineering 2015年第4期2卷 347-354页

作者： Qi NIU Xuegeng CHEN Chao JI Jie WU College of Engineering China Agricultural UniversityBeijing 100083China Machinery and Equipment Research Institute Xinjiang Academy of Agriculture and Reclamation SciencesShihezi 832000China College of Mechanical and Electrical Engineering Shihezi UniversityShihezi 832002China

It is imperative to carry out research on residual plastic film collection technology to solve the serious problem of farmland *** residual plastic film baler was designed as a package for film strip collection,cleaning and *** collection device is a core component of the *** surface analysis was used in this study to optimize the structure and working parameters for improving the collection efficiency of residual film and the impurity of film *** results show that the factors affecting the collection rate of residual film and the impurity of the film package are the speed ratio(k)between the trash removal roller and eccentric collection mechanism,the number(z)and the mounting angle(θ)of spring teeth in the same revolution *** the collection rate,the importance of the three factors are in the order,k>z>θ.Meanwhile,for the impurity,the importance of three factors are in the order,z>k>θ.When the speed ratio,the mounting angle and the number of spring teeth was set at 1.6°,45°,and 8°,respectively,the collection rate of residual film was 88.9%and the impurity of residual film package was 14.2%for the baler.

关键词： residual film collection device collection rate of residual film impurity of film package optimization baler

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Unsteady Flow Analysis of an Axial Flow Hydraulic Turbine with collection devices Comprising a Different Number of Blades

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Journal of Thermal Science 2015年第3期24卷 239-245页

作者： Yasuyuki Nishi Terumi Inagaki Yanrong Li Sou Hirama Norio Kikuchi Department of Mechanical Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki 316-8511 JAPAN Graduate School of Science and Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki 316-8511 JAPAN Ibasei Ltd. 4-7-10 Kamine-cho Hitachi-shi Ibaraki 317-0064 JAPAN

We previously devised a new type of portable hydraulic turbine that uses the kinetic energy of an open-channel flow to improve output power by catching and accelerating the flow. The turbine contains an axial flow runner with an appended collection device and a diffuser section that is not axisymmetric. The objective of this study is to determine how interference between the collection device and the runner influences performance characteristics of the turbine. We investigated the performance characteristics of the turbine and flow field for different numbers of blades during both unsteady and steady flow. During an unsteady flow, the maximum values of power coefficients for three and two blades increased by approximately 8.8% and 21.4%, respectively, compared to those during a steady flow. For the three-blade runner, the power coefficient showed small fluctuations, but for the two-blade runner, the power coefficient showed large fluctuations. These fluctuations in the power coefficient are attributed to fluctuations in the loading coefficient, which were generated by interference between the runner and the diffuser section of the collection device.

关键词： Hydraulic Turbine Runner collection device Performance Unsteady Flow Analysis

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