4100风冷柴油机（气缸盖）设计说明书.doc

4100风冷柴油机(气缸盖)设计说明书
摘要
此次设计机型为4100风冷柴油机。风冷柴油机具有结构简单、适应性强,系列化程度高,维修方便等优点。
本次设计根据风冷柴油机的特点和设计原则和普通柴油机的设计原则,在满足本次设计发动机的各性能参数和总体要求的基础上,从汽缸盖的工作条件,加工工艺,材料选择,进、排道的布置、喷油嘴和螺栓的布置等处着手,对汽缸盖做了设计。此外,气缸盖要有足够的强度和刚度,只有这样,发动机在高温气体的加热下,能够安全、可靠的工作。
本文从整机布置入手,根据风冷柴油机的基本设计规范以及各参数的选择和各方案的比较,概括论述了风冷柴油机的整体情况以及风冷柴油机设计中必须要注意的问题,如:如何得到保证良好的散热等问题。具体的详细计算了内燃机的散热量,因为其对多种零部件都有决定性的影响。
在设计中,通过对不同的方案的比较和分析选择出了比较适合4100风冷柴油机的好的方案,根据所计算散热量的具体值,详细的介绍了风冷柴油机气缸盖散热片的布置情况,冷却风扇的布置情况,并对它们进行了比较详细的尺寸计算,以满足这次设计的要求。最后,为了保证内燃机具有良好的冷却效果,采用了机油冷却活塞方式,并对机油泵的选择过程作了详尽的介绍。
最后结果表明:它们都很好的适合本次设计。在不同方面都提高了风冷柴油机的指标和性能。
关键词:风冷柴油机,排气门,风扇,气缸盖
DESIGN OF CYLINDER COVER OF
4100 AIR-COOLED DIESEL ENGINE
ABSTRACT
4100 air-cooled diesel engine is designed with advantages of simple structure, strong adaptability, high degree of series and convenient repair.
According to characteristics of the air-cooled diesel engine,design principle and the method of normal-grade diesel machine,cylinder cover is designed at these aspects, including working conditions of cylinder cap, process and techincs, material selection, entering and exhaust gas way, disposal of bean and bolt. The cylinder cover also meets all kinds of property parameters and total requirements. In addition, it should have enough rigidity and intensity to ensure safe and reliable work of the engine under the high temperature.
We research the lay-out of the whole engine. The paper summarizes the whole status of air-cooled diesel engine and issues which should be pay attention to in the design according to basic design and selections of parameters and protocols. We particularly calculate the quantity of heat dispelling since it has crutial influence on all kinds of parts.
In order to meet the design requirement, lay-out of the air-cooled cylinder covers and cool off fan is introduced according to quantity of heat dispelling. It also includes detailed size calculation. Finally, we adopt mode of oil cooling piston to ensure good cooling effect. The article also gives a det