工程挖掘機(jī)執(zhí)行機(jī)構(gòu)設(shè)計(jì)

機(jī)械論文編號(hào):JX524   論文字?jǐn)?shù):15446,頁數(shù):41  有CAD圖，開題報(bào)告，任務(wù)書
目 錄
摘 要 1
Abstract 1
第1章  緒論 5
1.1課題背景及目的 5
1.2挖掘機(jī)簡(jiǎn)史 5
1.3挖掘機(jī)的基本結(jié)構(gòu)與工作原理 5
第2章 總體方案設(shè)計(jì)及參數(shù)的選擇 6
2.1本設(shè)計(jì)方案的確定 7
2.1.1 所選挖掘機(jī)型式 7
2.1.2 所選機(jī)型特點(diǎn) 7
2.2 參數(shù)選擇 7
2.2.1 單斗液壓挖掘機(jī)的基本參數(shù) 7
2.2.2主參數(shù)斗容量﹑機(jī)重和發(fā)動(dòng)機(jī)功率 8
2.3 基本數(shù)據(jù)計(jì)算 8
2.3.1外形尺寸計(jì)算 8
2.3.2 各部分質(zhì)量計(jì)算 10
2.3.3  功率及挖掘力計(jì)算 11
2.3.4  回轉(zhuǎn)及行走機(jī)構(gòu)計(jì)算 11
第3章 執(zhí)行機(jī)構(gòu)總體方案設(shè)計(jì) 12
3.1 工作裝置構(gòu)成 13
3.2 動(dòng)臂及斗桿的結(jié)構(gòu)形式 15
3.3 動(dòng)臂油缸與鏟斗油缸的布置 15
3.4 鏟斗與鏟斗油缸的連接方式 15
3.5 鏟斗的結(jié)構(gòu)選擇 16
3.6 原始幾何參數(shù)的確定 16
第4章 工作裝置運(yùn)動(dòng)學(xué)分析 17
4.1 動(dòng)臂運(yùn)動(dòng)分析 17
4.2 斗桿的運(yùn)動(dòng)分析 18
第5章 基本尺寸的確定 19
5.1 斗形參數(shù)的確定 19
5.2 動(dòng)臂機(jī)構(gòu)參數(shù)的選擇 19
5.2.1 α1與A點(diǎn)坐標(biāo)的選取 19
5.2.2 l1與l2的選擇 19
5.2.3 l41與l42的計(jì)算 20
5.2.4 l5的計(jì)算 20
5.3 動(dòng)臂機(jī)構(gòu)基本參數(shù)的校核 21
5.3.1 動(dòng)臂機(jī)構(gòu)閉鎖力的校核 21
5.3.2 滿斗處于最大挖掘半徑時(shí)動(dòng)臂油缸提升力矩的校核 22
第6章 工作裝置結(jié)構(gòu)設(shè)計(jì) 25
6.1動(dòng)臂結(jié)構(gòu)設(shè)計(jì) 25
6.1.1第一工況位置 25
6.1.2 第二工況位置 29
6.1.3內(nèi)力圖和彎矩圖的求解 32
6.2 鏟斗的設(shè)計(jì) 36
6.2.1鏟斗斗形尺寸的設(shè)計(jì) 36
6.2.2鏟斗斗齒的結(jié)構(gòu)計(jì)算 37
第7章  銷軸與襯套的設(shè)計(jì) 38
7.1 銷軸的設(shè)計(jì) 38
7.2 銷軸用螺栓的設(shè)計(jì) 38
7.3 襯套的設(shè)計(jì) 38
第8章 總結(jié) 38
致 謝 40
參考文獻(xiàn) 41
附件  一 41
附件  二 46

摘 要： 挖掘機(jī)作為我國(guó)工程機(jī)械的主力機(jī)種，被廣泛應(yīng)用于各種各樣的施工作業(yè)中。挖掘機(jī)產(chǎn)品的核心技術(shù)就是由于挖掘機(jī)的工作條件惡劣，要求實(shí)現(xiàn)的動(dòng)作復(fù)雜，于是它對(duì)執(zhí)行系統(tǒng)的設(shè)計(jì)提出了很高的要求，其執(zhí)行系統(tǒng)也是工程機(jī)械液壓系統(tǒng)中最為復(fù)雜的。因此，對(duì)挖掘機(jī)液壓系統(tǒng)的分析設(shè)計(jì)對(duì)推動(dòng)我國(guó)挖掘機(jī)發(fā)展具有十分重要的意義。
    在搜集了國(guó)內(nèi)外挖掘機(jī)執(zhí)行系統(tǒng)相關(guān)資料的基礎(chǔ)上，了解了挖掘機(jī)執(zhí)行系統(tǒng)的發(fā)展歷史，并對(duì)挖掘機(jī)執(zhí)行系統(tǒng)的技術(shù)發(fā)展動(dòng)態(tài)進(jìn)行了分析總結(jié)。論文對(duì)挖掘機(jī)的各種工況進(jìn)行了分析，系統(tǒng)總結(jié)了挖掘機(jī)液壓系統(tǒng)的設(shè)計(jì)要求。根據(jù)挖掘機(jī)執(zhí)行系統(tǒng)的設(shè)計(jì)要求，論文中采用通用多路閥，配以專用控制閥和簡(jiǎn)單的電子控制系統(tǒng)，設(shè)計(jì)了一套適合我國(guó)生產(chǎn)制造的LS恒功率控制單斗挖掘機(jī)液壓系統(tǒng)。
 本次畢業(yè)設(shè)計(jì)課題是挖掘機(jī)執(zhí)行機(jī)構(gòu)設(shè)計(jì)。小型挖掘機(jī)由多個(gè)系統(tǒng)組成，包括液壓系統(tǒng)，傳動(dòng)系統(tǒng)，操縱系統(tǒng)，工作裝置，底架，轉(zhuǎn)臺(tái)，油箱，發(fā)動(dòng)機(jī)安裝等。本人的設(shè)計(jì)主要致力于分析和設(shè)計(jì)小型液壓挖掘機(jī)執(zhí)行機(jī)構(gòu)設(shè)計(jì)。本課題選擇了國(guó)內(nèi)的質(zhì)量和技術(shù)性能都接近設(shè)計(jì)要求的16~20t挖掘機(jī)作為基型，并在此基礎(chǔ)上研究了國(guó)外的先進(jìn)機(jī)型，設(shè)計(jì)出我們挖掘機(jī)的液壓系統(tǒng)方按圖，總體裝配圖以及相應(yīng)的部件圖和零件圖。圖紙基本采用Auto CAD二維軟件繪圖。
 
 
關(guān)鍵詞：挖掘機(jī)，執(zhí)行機(jī)構(gòu)，系統(tǒng)。

Abstract
    As China's construction machinery excavator main models have been widely used in a variety of construction operations. Excavator product's core technology is the excavator as a result of poor working conditions, requested action to achieve the complexity of its implementation of the system so the design of high demands, the implementation of systems engineering machinery hydraulic system is the most complex. Therefore, the analysis of excavator hydraulic system design in promoting the development of China's excavator of great significance.    Excavator at home and abroad in gathering relevant information to implement the system on the basis of the excavator about the history of the development of the implementation of the system and execution system excavator dynamics of technology development has been analyzed and summarized. Papers on a variety of excavators working condition were analyzed, the system summed up the excavator's hydraulic system design requirements. Excavator system in accordance with the implementation of the design requirements, the use of paper in general multi-way valve, with special control valves and a simple electronic control system, design a set for my LS produced constant power control system of hydraulic shovels.     The graduation project is the subject of the implementation of mechanism design excavator. Mini-excavator from multiple systems, including hydraulic system, transmission system, control system, the working devices, chassis, turntable, fuel tanks, engine installation. I focused on the design of the analysis and design of small hydraulic excavator design implementation. Select the topics of domestic quality and technical performance are close to the design requirements of 16 ~ 20t excavator as the base type, and on this basis to study abroad, advanced models, design of hydraulic excavators of our system side by map general assembly drawing and the corresponding parts diagram and parts diagram. The use of Auto CAD drawings of the basic two-dimensional graphics software.
Key words：Construction machinery excavator； Actuators; Ssterm