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    化工液罐汽车结构设计说明书毕业论文.doc

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    化工液罐汽车结构设计说明书毕业论文.doc

    目录引言·······························································································11专用汽车概述················································································21.1专用汽车的一般概念及分类···························································21.2专用汽车在汽车工业中的地位和作用···············································21.3专用汽车的发展现状及发展趋势·····················································21.3.1专用汽车的发展现状··································································21.3.2专用汽车的发展趋势··································································22化工液罐汽车的总体设计································································42.1液化石油气·················································································42.1.1液化石油气的组成·····································································42.1.2液化石油气的发展和用途····························································42.2液化石油气罐汽车的使用安全要求··················································52.2.1投入使用前的管理·····································································52.2.2充装和卸料作业········································································52.3总体结构布置··············································································52.3.1主要参数的选择········································································62.3.2主要技术参数···········································································73专用汽车主要性能计算····································································93.1发动机的外特性···········································································93.2汽车的行驶方程式·····································································103.3动力性评价指标的计算······························································134罐体的结构与设计········································································184.1罐体的结构···············································································184.2罐体的壁厚计算·········································································214.3管道系统和液泵选择·································································234.3.1管道系统组成和设计要求··························································234.3.2管道系统的主要部件································································244.4气路控制系统···········································································285结论··························································································30致谢·····························································································31参考文献·······················································································32附录A译文··················································································32附录B外文文献·····················································错误!未定义书签。辽宁工程技术大学毕业设计(论文)1引言2006年是我国专用汽车行业“十一五”规划的第一年,“十五”期间,我国国民经济一直保持快速、稳定、健康的发展态势,专用汽车行业在此期间取得了较大的发展,汽车行业管理体制不断得到完善和加强,逐步向科学化管理迈进,专用汽车行业企业性质也发生了很大变化,产品结构、产品技术、工艺装备、产品产销量、新产品开发与新技术应用等方面均取得了很大的成就。我国专用汽车近年来在新产品开发方面较过去有较大进步,由于我国正处于发展中国家向发达国家转变的进程中,基础设施建设还处于高峰期,所以我国对专用汽车市场的需求主要还是以运输物资、满足基础设施建设为主的车型,加上我国劳动力资源比较丰富,该市场形态决定了我国专用汽车现阶段呈现结构形式简单、功能单一、低附加值产品过多的状况。目前国内专用车的品种已达1600多个,专用车已占商用车总产量的30%左右。由于专用车单一品种的市场容量有限,而且大多用户对产品有较多的个性化需求,因此大多数企业生产规模都较小,只有需求量较大的产品如自卸车、牵引车、货厢式运输车、罐车、半挂车等产品的生产批量较大。与同类型产品先比,化工液罐汽车在专用汽车的生产使用中占有很大比例,这是由于近年来我国的化工工业发展较快,一些具有易燃、易爆、强腐蚀等特征化工产品,如硫酸、乙烯、丁二烯等不能用普通运输方式运输,故而,采用化工液罐车是最好的选择。目前,我国在这方面的技术于一些发达国家相比还比较落后,本次设计,为我提供了一个学习专用汽车知识的机会,为我将来在相关工作中打下了良好的理论基础。陈广旭:化工液罐汽车结构设计21专用汽车概述1.1专用汽车的一般概念及分类“专用汽车”这一术语目前在世界上还没有统一的标准,国外的专用汽车或专用车辆一般是指一种在许多特征上不同于基本型汽车或经过特殊改装之后才能用于运输货物和(或)人员的车辆,以及只用于完成特定任务的车辆。我国对“专用汽车”术语于1989年已制定了相应的标准ZBT5000489专用汽车的术语及定义。ZBT5000489标准对国产专用汽车定义为:“装置有专用设备,具备有专用功能,用于承担专门运输任务或专项作业的汽车”。ZBT5000489标准还将国产专用汽车划分为厢式汽车、罐式汽车、专用自卸汽车、起重举升汽车、仓栅汽车和特种结构汽车等六大类。1.2专用汽车在汽车工业中的地位和作用汽车工业的发展必然是汽车运输业的发展,由于社会对汽车的运输效率和经济性,以及各种功能和性能的要求的不断提高,使汽车运输工具走向专用化成为必然趋势。专用汽车能同时在汽车工业生产和国民经济建设中起重要作用,其表现在:专用汽车作业能有效的提高汽车的运输效率,减少劳动时间,降低作业成本;能够减少汽车运输途中的货损、货差和提高安全性;发展专用汽车生产能扩大汽车的应用领域,增加汽车的工业产出,给国民带来巨大的经济效益。1.3专用汽车的发展现状及发展趋势1.3.1专用汽车的发展现状国外的专用汽车工业起步比较早,发展至今其产品种类相对较为齐全、技术较为成熟、而且在本国和世界上占有相当大的市场。我国的专用汽车起步于上个世纪60年代,在军用改装车辆、消防改装汽车的基础上逐步发展起来。70年代,一些专用汽车生产厂根据国民经济各部门需要,形成了自己产品特色,逐步发展成为专用汽车的骨干企业。目前,我国的专用汽车行业得到了巨大的发展,但是,纵观国内经济发展需求和世界工业发达国家专用汽车发展趋势,我国的专用汽车还比较单一,数量和品质也仍处于较低档次,在国际上很难与一些世界知名厂家的产品相媲美。1.3.2专用汽车的发展趋势

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