山地手扶式切割压扁机动力及操纵机构设计.docx
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1、中文摘要优质苜蓿是饲料生产体系的重要组成部分,苜蓿产业化发展对于促进草食畜牧业发展、改善生态环境、发展低碳产业等方面都具有重要作用。当前我国苜蓿生产机械化整体水平低,收获损失大,致使苜蓿草产品品质低下,严重制约了苜蓿产业化的发展和规模的提升。特别是在西北地区,由于苜蓿多种植在山坡、丘陵地带,可以通过的地段狭窄,需要爬坡来完成切割压扁工作,故需要功率较大、外形尺寸较小,且具有爬坡功能的手扶自走式工作机械。本文首先根据山地手扶自走式机械的工况条件及发动机选择条件,初步确定了发动机的基本形式,然后完成了发动机的动力计算及参数确定,并根据计算结果及各种型号发动机功率特性曲线,完成了发动机的选型。接着对
2、整机的工作情况进行分析,结合典型手扶拖拉机的操纵机构,确定了本机操纵机构的整体方案,然后根据操纵机构的基本设计要求完成了各操纵手柄的设计,并对操纵机构进行了制动力的校核,最后完成了操纵机构的CATIA装配图。关键字:手扶式,发动机匹配,操纵机构AbstractHigh quality alfalfa is an important part of feed production system. Alfalfa industrialization playsa key role in promoting plant-eating animal husbandry development, imp
3、roving the ecologicalenvironment and developing low carbon industry. At present Chinas alfalfa production mechanizationlevel is comparatively low, harvest loss is huge and the clover product quality is extraordinarily low,which restrict the development of alfalfa industrialization and scale of ascen
4、sion. Especially in thenorthwest region, due to the alfalfa planting location is narrow and mainly is slopes and hilly terrain,the cutting squashed work need to be done with the machine climbing. Thus a more powerful, smallershape, and which has the function of uphill walking self-contained work mac
5、hinery is needed.This paper according to the working condition of mountain walking self-propelled machineryand engine selection criteria preliminary determine the basic form of the engine, then complete theengine power calculation and parameter determination, and according to the calculated results
6、andvarious models of engine power characteristic curve, complete the engine type selection. Then theworking condition of the whole machine are analyzed, combining with the operating mechanism oftypical walking tractor, determine the native operating mechanism of the overall solution, thenaccording t
7、o the basic design requirements of operating mechanism to complete the design of thecontrol handle, and operating mechanism for the checking of braking force, give out the main draw ofthe operating mechanism and CATIA Three-dimensional modeling.Keywords: Walking type, the engine matching, operating
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- 关 键 词:
- 山地 手扶 切割 压扁 机动力 操纵 机构 设计
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