小型柴油机的气缸盖设计(含CATIA三维图)

小型柴油机的气缸盖设计(含CATIA三维图)(外文翻译,论文说明书13900字,CATIA三维图)
摘  要
小型柴油机的气缸盖作为柴油机最主要和最复杂的零件之一，长期工作在恶劣的环境下，承受很高的热负荷和机械负荷，它的工作状况直接影响到柴油机的性能、工作可靠性和排放等指标。
本文在阐述气缸盖设计过程的同时也对主要零部件的设计要点进行了总结，着重讨论了气缸盖重要部位的设计要求及特点。通过类比法首先确定气缸盖的外观尺寸，气门布置，底板厚度，气门高度，顶部的结构布置等，再由缸径来确定燃烧室布置、气门直径、螺栓直径、冷却水道等尺寸。然后是建立气缸盖的三维模型，在建模的过程中不断的调整尺寸和螺栓布置等，在以上步骤中螺旋进气道和切向排气道模型的建立是难点。下一步将各个设计好的部分组装成整体，最终得到了符合尺寸、强度、冷却效果和进/排气效果要求的柴油机气缸盖三维模型。
关键词：柴油机，气缸盖，冷却水道，进气道，排气道

Abstract
The cylinder head of a small diesel engine, as one of the most important and complex component of a diesel engine permanently operates under very harsh environments and bears a very high thermal load as well as mechanical load. Its operating condition affects directly the performance, the operational reliability, the emission and other index of a diesel engine. [资料来源：http://www.THINK58.com]
This paper describes the design process of the cylinder head and at the same time summarizes the key points of design of the main components, discussing the requirements and features of the design of main parts of a cylinder head. Firstly, through the method of analogy, the external dimension, the valve arrangement, the baseboard thickness, the Height of the valve, the structure layout on the top etc. are determined. Secondly, the Combustion chamber arrangement, the diameter of valve, the diameter of bolt, the size of the cooling channel and some other dimensions are determined on the base of the cylinder diameter. The next step is building a 3D model of the cylinder head, during which process we need to continuously adjust the size, the arrangements of bolts and so on. Among all the above steps, the difficult point is the model buildings of the spiral inlet and tangential exhaust duct. After all these are done, the already-designed parts are assembled as a whole and at last a 3D model of the cylinder head of a diesel engine that meets the requirements of size, strength, the cooling effect and the intake/exhaust effect is yielded.

[资料来源：http://THINK58.com]
目录
第一章  绪论    1
1.1柴油机气缸盖的功用及对发动机性能影响    1
1.2气缸盖的工作环境    1
1.3柴油机气缸盖的设计及发展    2
1.4本论文的主要内容    2
第二章  气缸盖简介及设计要求    4
2.1气缸盖总体设计要求    4
2.2气缸盖的火力面    4
2.3进排气道    5
2.4气缸盖螺栓的布置    6
2.5冷却水道的布置    6
2.6本章小结    7
第三章  气缸盖设计    8
3.1气缸盖材料选择    8
3.2气缸盖结构形式的选择    10
3.3火力面的布置    12
3.3.1气门的布置方案    12
3.3.2喉口的布置方案    12
3.3.3气缸盖底板的设计    14
3.4进排气道的布置    14
3.5气缸盖螺栓的布置    19 [资料来源：http://think58.com]
3.6冷却水道的布置    22
3.7气缸盖的重要剖面图和模型图    23
3.7.1模型图    23
3.8本章总结    25
总  结    26
参考文献    27
致谢    28
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