4LZ-2型自走式谷物联合收割机设计.doc

4LZ-2型自走式谷物联合收割机（切割部分） 摘 要 我国幅员辽阔，但人均耕地占有量少。如何利用有有限的土地资源去养活中国日益增加的人口，对于我们来说有重要的意义。加大对农业的投入，提高农业的机械化程度，特别是加大对谷物联合收割机的研发投入，有重要的意义。 目前广泛使用的谷物联合收割机可分为两大类，即背负式和自走式谷物联合收割机。而自走式谷物联合收割机因为其机动性好，可靠性高和性能优良而使用广泛并深受广大农民的欢迎。在这次毕业设计中，我们一组成员在查阅了大量资料的基础上，对4LZ-2自走式谷物联合收割机进行了比较合理的总提布局和参数选择的分析计算。以降低成本、增加可靠性和保证良好的作业性能为设计宗旨。 4LZ-2型自走式谷物联合收割机主要以收割小麦和水稻为主，可兼收其他作物。具有良好的机动性和通用性，不仅适应大田，也适应小地块和含水量高的谷物收割。该机型在广大农民中，很受欢迎，加大对其研发投入，在降低成本，提高技术的基础上，更上一层楼。可以预见，4LZ-2型自走式谷物联合收割机前景广阔。 关键词：农业，自走式谷物联合收割机，总体布局 THE 4LZ-2 SEIF-PROPELLED COMBINE HARVESTER (CUTTING PART) ABSTRACT China has a vast territory,but the per capitafarml is less than possession.How to use the limited land resources to feed China’s growing population,which is an important significance.Increase input in agriculture to improve agricultural mechanization level.Particular,increase grain Combine the R & D，investment,is important. Now widely used in cereal Combine can be divided into two categories,namely shoulder-and self-grain combine harvesters .The self-Combine cereal because of their good mobility,high reliability and performance quality and the use exextensive and welcomed by the majority of farmers.In this graduation projece,we all members of a group through several market research,and a great deal of information available on the basis of 4LZ-2 self-cereal Combine a more reasonable parameters and the overall layout of choice. To reduce costs and increase reliability and ensure a good operating performance for purposes of design. 4LZ-2-type self-Combine the main cereal harvest in the main wheat and rice,can be integrated to other crops.Has good mobility and through,not only to daejeon,but also to small and high moisture content of grain harvest.The models in the majority of farmers,very popular,and increase their R & D investment,reduce costs and improve technology on the basis of a higher level.It can be foreseen,4LZ-2-type self-cereal Combine the prospects are bright. KEY WORDS：agriculture,self-Combine cereal,g