机械制造与自动化专业毕业论文--基于PROE的球阀的设计.doc

摘 要 球阀，GB/T21465-2008《阀门术语》中定义为：启闭件（球体）由阀杆带动，并绕阀杆的轴线作旋转运动的阀门。主要用于截断或接通管路中的介质，亦可用于流体的调节与控制，其中硬密封V型球阀其V型球芯与堆焊硬质合金的金属阀座之间具有很强的剪切力，特别适用于含纤维、微小固体颗料等介质。而多通球阀在管道上不仅可灵活控制介质的合流、分流、及流向的切换，同时也可关闭任一通道而使另外两个通道相连。本类阀门在管道中一般应当水平安装球阀问世于20世纪50年代，随着科学技术的飞速发展，生产工艺及产品结构的不断改进，在短短的40年时间里，已迅速发展成为一种主要的阀类。在西方工业发达的国家，球阀的使用正在逐年不断的上升，在我国，球阀被广泛的应用在石油炼制、长输管线、化工、造纸、电力、市政、钢铁等行业，在国民经济中占有举足轻重的地位。C. 关键词：球阀；密封；发展；阀体；数控加工；固定球阀；Pro/E三维建模 目 录 摘 要·······································································I 前 言······································································1 第一章 绪论·····························································2 1.1 课题研究的背景····················································2 1.1.1 国内外控制阀的发展现状····································2 1.1.2 国内外的研究动态······································3 1.2 课题研究的领域····················································5 1.2.1 控制阀在各生产领域中的应用·······························5 第二章球阀的简单分析 ·················································6 2.1球阀的功用和用途··················································6 2.2球阀的工作原理··············································6 2.3球阀的主要特点·····················································7 2.4设计需达到技术要求·················································8 2.4．1阀体························································8 2.4、2球体························································8 2.4．3阀杆························································9 第三章 球阀的类型结构及其材料·····································9 3.1 球阀的类型 ······················································ 9 3.2球阀的结构························································10 3.3球阀中各结构组成部分的材料······································10 3.4 球阀的密封性·····················································10 3.4．1影响球阀密封性的主要因素··································11 第四章球阀的维护、保养、安装和使用等注意事项····················11 4.1操作·······························································11 4.2维护、保养、安装和使用注意事项····································11 4.3可能发生的故障及消除办法···············