【作者】 徐兰；

【导师】 滕儒民； 左希思；

【作者基本信息】 大连理工大学 ， 机械工程（专业学位）， 2016， 硕士

【摘要】 转载船是集货轮、装船机以及卸船机为一体的新型港口物料转运设备,其主要针对特定地域的装卸用港口而研制。由于我国转载船的发展时间短,技术储备条件不足,再加上其设计制造的成本比较昂贵,因此,国内市场上尚无大型的转载船出现。转载船的核心技术是船上的卸载系统,5000t/h转载船卸载系统的设计研究,有助于国内海运行业中转载船产品的多样化和环保化,并且可以拓宽国际市场,提升自身竞争力。论文首先明确了转载船卸载系统的设计思路,通过利用在国内已有成熟设计及运用经验的卸船机典型结构为平台,并结合有限元设计方法,按照澳大利亚MRL公司提供的主参数进行大型转载船卸载系统的结构设计。论文的主要工作有以下几个方面：(1)介绍课题的选题背景及研究领域,对国内外转载船卸载系统研制及使用情况进行了简单了解。(2)明确了转载船上卸载系统的一般设计流程及其主要部件的计算方法,为相关卸载设备的设计提供了参考。(3)以公司正在研制的5000t/h转载船实际项目为例,完成了作为卸料系统中的核心组成部分的方案设计。计算分析了斗轮取料装置的驱动力及功率需求,并确定了具体形式。根据物料特性及输送能力的需求,确定了输送带上物料布置横截面形状最大允许情况,详细讨论了输送阻力及输送带下挠所产生的影响因素,完成了输送能力的计算和功率需求计算分析。(4)根据转载船使用工况结合FEM相关规范,确定了三种载荷组合分析工况,对5000t/h转载船的卸载系统主体结构进行了有限元仿真分析。完成了斗轮体钢结构,斗轮梁架,卸料装置主体钢结构,卸料机构以及拉杆结构的有限元模型建立,根据结构特点选用了相应单元类型,在不同工况下进行了局部和部件组合的整体构造有限元分析。根据规范标准要求以及使用的客户需求,确定了对结果的验收标准,以满足要求的刚度和强度为目标,对卸载系统结构进行了优化计算和设计再完善。论文紧紧围绕卸载系统总体方案布局的合理性及结构设计的可行性展开研究,为本领域后续工作的系列展开起到了指导作用,同时也为其它相关卸载机械的设计提供了参考依据。更多还原

【Abstract】 A transshipping vessel is composed of cargo ships, the ship loader and the ship unloader, that is developed mainly for the specific area of loading and unloading port. As for the research on transshipping vessels in our country, it is started in these years. Not only the technical accumulations are lack of, but also the cost of its design and manufacture is high. Thus, there is not a large-scale transshipping vessel appeared on the domestic market. What’s more, the ship’s core technology is the ship unloading system, research on the design of unloading system mounted on 5000t/h transshipping vessel will contribute to the diversification of the maritime industry reshipment ship products and environmental protection, and can expand the international market, and enhance the competitiveness of their own.Firstly, the thesis clarifies the design of the transshipping vessel unloading system on the base of the existing mature methods and experience then combined with the finite element analysis, according to the main parameters of structure provided by Australian MRL company.The main work of this paper is as the following:(1) Introducing the background of the research field and making a brief review of the development and application of the unloading system of the domestic and foreign ship unloading system.(2) The whole design procedure and the calculation method of the main parts of the unloading system are detailed demonstrated, which can be referred for the design of the unloading equipment.(3) Taking the 5000t/h transshipping vessel project as an example which is the present project of our company in process, the layout design of process of the reclaiming and the unloading device in the unloading system is completed here as the key parts in this project. Firstly, the driving force and power for the bucket wheel is determined after detailed calculation. And the style is also discussed based on the calculated results. Secondly, the conveying capacity of the transporting system is determined in according to the transported material and custom demanding. Not only the figure of the material mounted on the conveyor belt but also the resisting force and belt deflection are considered when calculating the capacity. At last the satisfied power and force are presented.(4) In according to the rules of FEM applied when designing the transshipping vessel, the Finite Element Analysis (FEA) of the main structures in 5000t/h transshipping vessel is done and there are 3 kinds of load combinations involved. The most main structures of analysis modes are built including bucket wheel, beam of supporting bucket wheel, unloading device and the links. The mechanic conditions are abstracted and the elements types are well selected concerning to the relevant parts. The acceptance criteria are presented here for meeting the requirements of the rules, smaller deflection and better intensity. So the unloading system is optimized and re-designed based on the FEA calculating results.The research is focusing on the reasonability and feasibility of the overall layout and structure of the unloading system. And a series of follow-up work in this field is launched as the guidance. Meanwhile it is also a useful reference for the design of other mechanical unloading.更多还原