本 科 生 畢 業(yè) 設(shè) 計(jì)姓 名： 學(xué) 號(hào)： 學(xué) 院： 機(jī)電學(xué)院 專 業(yè)： 機(jī)械工程及自動(dòng)化 設(shè)計(jì)題目： 25t 汽車式液壓起重機(jī)設(shè)計(jì) 專 題： 基于 AMESim 起升機(jī)構(gòu)液壓系統(tǒng)仿真研究 指導(dǎo)教師： 職 稱： 二 O 年 六 月 畢業(yè)設(shè)計(jì)任務(wù)書學(xué)院 機(jī)電學(xué)院 專業(yè)年級(jí) 學(xué)生姓名 任 務(wù) 下 達(dá) 日 期 ： 畢業(yè)設(shè)計(jì)日期： 畢業(yè)設(shè)計(jì)題目：25t 汽車式液壓起重機(jī)設(shè)計(jì)畢業(yè)設(shè)計(jì)主要內(nèi)容和要求：（1）25t 汽車式液壓起重機(jī)的總體設(shè)計(jì)；（2）25t 汽車式液壓起重機(jī)的伸縮機(jī)構(gòu)設(shè)計(jì)，（3）起升機(jī)構(gòu)的設(shè)計(jì)選型；（4）汽車起重機(jī)的回轉(zhuǎn)機(jī)構(gòu)設(shè)計(jì)；（5）轉(zhuǎn)臺(tái)結(jié)構(gòu)的設(shè)計(jì)。院長(zhǎng)簽字： 指導(dǎo)教師簽字： 畢業(yè)設(shè)計(jì)指導(dǎo)教師評(píng)閱書指導(dǎo)教師評(píng)語(yǔ)（①基礎(chǔ)理論及基本技能的掌握；②獨(dú)立解決實(shí)際問(wèn)題的能力；③ 研究?jī)?nèi)容的理論依據(jù)和技術(shù)方法；④取得的主要成果及創(chuàng)新點(diǎn)；⑤ 工作態(tài)度及工作量；⑥總體評(píng)價(jià)及建議成績(jī)；⑦存在問(wèn)題；⑧是否同意答辯等）：成 績(jī)： 指導(dǎo)教師簽字：年 月 日 畢業(yè)設(shè)計(jì)評(píng)閱教師評(píng)閱書評(píng)閱教師評(píng)語(yǔ)（①選題的意義；②基礎(chǔ)理論及基本技能的掌握；③ 綜合運(yùn)用所學(xué)知識(shí)解決實(shí)際問(wèn)題的能力；④工作量的大??；⑤取得的主要成果及創(chuàng)新點(diǎn)；⑥寫作的規(guī)范程度；⑦總體評(píng)價(jià)及建議成績(jī)；⑧存在問(wèn)題；⑨是否同意答辯等）：成 績(jī)： 評(píng)閱教師簽字：年 月 日 畢業(yè)設(shè)計(jì)評(píng)閱教師評(píng)閱書評(píng)閱教師評(píng)語(yǔ)（①選題的意義；②基礎(chǔ)理論及基本技能的掌握；③ 綜合運(yùn)用所學(xué)知識(shí)解決實(shí)際問(wèn)題的能力；④工作量的大??；⑤取得的主要成果及創(chuàng)新點(diǎn)；⑥寫作的規(guī)范程度；⑦總體評(píng)價(jià)及建議成績(jī)；⑧存在問(wèn)題；⑨是否同意答辯等）：成 績(jī)： 評(píng)閱教師簽字：年 月 日 畢業(yè)設(shè)計(jì)答辯及綜合成績(jī)答 辯 情 況回 答 問(wèn) 題提 出 問(wèn) 題 正 確基 本正 確有 一般 性錯(cuò) 誤有 原則 性錯(cuò) 誤沒(méi) 有回 答答辯委員會(huì)評(píng)語(yǔ)及建議成績(jī)：答辯委員會(huì)主任簽字： 年 月 日學(xué)院領(lǐng)導(dǎo)小組綜合評(píng)定成績(jī)：學(xué)院領(lǐng)導(dǎo)小組負(fù)責(zé)人： 年 月 日摘 要隨著我國(guó)經(jīng)濟(jì)建設(shè)的快速發(fā)展，對(duì)汽車起重機(jī)需求量越來(lái)越大，對(duì)其性能的要求也越來(lái)越高。國(guó)內(nèi)中小型汽車起重機(jī)的技術(shù)已非常成熟，本文參照現(xiàn)有的成熟產(chǎn)品，設(shè)計(jì)出 QY25 型汽車起重機(jī)。設(shè)計(jì)的主要內(nèi)容有：參考國(guó)內(nèi)外同等噸位的成熟產(chǎn)品，進(jìn)行本機(jī)的總體結(jié)構(gòu)設(shè)計(jì)，力求總體布局結(jié)構(gòu)緊湊。起重機(jī)伸縮臂的結(jié)構(gòu)設(shè)計(jì)，在 ANSYS11.0 中建立基本臂的有限元模型，分析兩種惡劣工況下的應(yīng)力分布，并依據(jù)分析結(jié)果進(jìn)行結(jié)構(gòu)改進(jìn)。起重機(jī)起升機(jī)構(gòu)的選型設(shè)計(jì)，并在 AMESim 中對(duì)整機(jī)液壓系統(tǒng)中最重要的起升回路進(jìn)行動(dòng)態(tài)仿真，依據(jù)仿真結(jié)果改進(jìn)液壓系統(tǒng)，提高系統(tǒng)的動(dòng)態(tài)響應(yīng)。起重機(jī)回轉(zhuǎn)機(jī)構(gòu)的設(shè)計(jì)計(jì)算，包括回轉(zhuǎn)支承裝置和回轉(zhuǎn)驅(qū)動(dòng)裝置。起重機(jī)轉(zhuǎn)臺(tái)結(jié)構(gòu)設(shè)計(jì)，在 ANSYS11.0 中建立轉(zhuǎn)臺(tái)的有限元分析模型，分析兩種惡劣工況下的應(yīng)力分布，依據(jù)結(jié)果進(jìn)行結(jié)構(gòu)改進(jìn)。主要?jiǎng)?chuàng)新點(diǎn)在于：伸縮機(jī)構(gòu)采用雙缸加一級(jí)繩排，不同于國(guó)內(nèi)的單缸加一級(jí)繩排結(jié)構(gòu)，系統(tǒng)的安全性更高，各節(jié)臂的運(yùn)作獨(dú)立性更好。對(duì)現(xiàn)有起升機(jī)構(gòu)的液壓回路進(jìn)行了改進(jìn)，使系統(tǒng)的動(dòng)態(tài)響應(yīng)性能更好。關(guān)鍵詞：汽車起重機(jī)；總體結(jié)構(gòu)設(shè)計(jì)；有限元；動(dòng)態(tài)響應(yīng)ABSTRACTThe demand for truck crane is getting bigger and bigger with the rapid development of our country’s economic construction, and the request of its performance is also getting higher and higher.The technology of medium and small truck cranes has been very mature.This article designs QY25 truck crane through the reference of existing mature products.The main contents are:The overall structure design of the crane through the reference of the same tonnage mature products in domestic and foreign to make the entire structure layout compact .The design of the crane’s extension section.This article creats the finite element model of pivot beam in ANASYS11.0,then analyzes the stress distribution of two bad condition and improves the structure according the resuits.The type design of the hoisting mechanism.Carrying out the dynamic simulation of lifting loop which is the most impotant loop in the whole hydraulic system,then improve the dynamic response of the system accoreding the results.The design and calculation of crane’s slew mechanism including the rotary bearing and rotary drive device.The design of slewing platform superstructure. This article creats its finite element model in ANASYS11.0,then analyzes the stress distribution of two bad condition and improves the structure according the results.The innovative design lays on that the extension section adoptes two hydraulic cylinders plus a rope which is different from the one hydraulic cylinder plus two ropes in domestic.In a result the security of the system is higher and the operational independence of beems is better.In addition ,this article improves the existing hydraulic circuit of hoisting mechanism to make the system’s dynamic response better.Key words: truck crane; overall structure design; finite element ; dynamic response目 錄1 緒 論 ........................................................................................................................................11.1 概論 ......................................................................................................................................................11.2 國(guó)外汽車起重機(jī)的發(fā)展?fàn)顩r ....................................................................................21.3 國(guó)內(nèi)汽車起重機(jī)的發(fā)展?fàn)顩r ........................................................................................................21.4 汽車起重機(jī)的發(fā)展趨勢(shì) .................................................................................................................41.5 個(gè)人工作重點(diǎn) ....................................................................................................................................52 汽車起重機(jī)的總體設(shè)計(jì) ............................................................................................................................72.1 汽車起重機(jī)的底盤選型 .................................................................................................................72.1.1 汽車起重機(jī)的底盤類型 ......................................................................................................72.1.2 汽車起重機(jī)的底盤選型 ......................................................................................................82.2 汽車起重機(jī)的工作級(jí)別 .................................................................................................................82.2.1 起重機(jī)利用等級(jí) ....................................................................................................................82.2.2 起重機(jī)的載荷狀態(tài) ...............................................................................................................92.2.3 起重機(jī)工作級(jí)別的確定 ......................................................................................................92.3 起重機(jī)主要技術(shù)參數(shù)的確定 ........................................................................................................92.3.1 技術(shù)參數(shù)簡(jiǎn)介 ........................................................................................................................92.3.2 起重機(jī)技術(shù)參數(shù)的確定 ....................................................................................................102.4 起重機(jī)質(zhì)心的確定 ........................................................................................................................122.4.1 主要部件質(zhì)量的確定 .........................................................................................................122.4.2 整車質(zhì)心位置的確定 .........................................................................................................132.5 起重機(jī)三鉸點(diǎn)位置的確定及其優(yōu)化 .........................................................................................142.5.1 吊臂根部鉸點(diǎn)位置的確定 ...............................................................................................142.5.2 變幅液壓缸鉸點(diǎn)位置的確定 ............................................................................................152.5.3 三鉸點(diǎn)位置的優(yōu)化模型 ....................................................................................................162.6 具體的設(shè)計(jì)計(jì)算 .............................................................................................................................202.6.1 主臂起升高度、吊臂仰角的計(jì)算 ..................................................................................202.6.2 臂架整體受力分析 .............................................................................................................202.6.3 變幅油缸受力分析 .............................................................................................................242.6.4 轉(zhuǎn)臺(tái)結(jié)構(gòu)受力分析 .............................................................................................................253 伸縮式吊臂的設(shè)計(jì)計(jì)算 .........................................................................................................................273.1 伸縮臂截面參數(shù)的確定 ...............................................................................................................273.1.1 吊臂截面的選取 .................................................................................................................273.1.2 吊臂截面的具體參數(shù) ........................................................................................................283.2 主臂伸縮機(jī)構(gòu)的設(shè)計(jì) ....................................................................................................................293.3 主臂機(jī)構(gòu)結(jié)構(gòu)特征 ........................................................................................................................303.4 吊臂各節(jié)尺寸的確定 ....................................................................................................................313.5 變幅油缸的設(shè)計(jì)計(jì)算 ....................................................................................................................333.6 基本臂有限元分析 ........................................................................................................................353.6.1 有限元模型 ...........................................................................................................................353.6.2 計(jì)算工況 ...............................................................................................................................363.6.3 結(jié)果分析 ...............................................................................................................................364 汽車起重機(jī)的提升機(jī)構(gòu)設(shè)計(jì) ................................................................................................................394.1 起升機(jī)構(gòu)形式的選擇 ....................................................................................................................394.2 起升機(jī)構(gòu)的零部件選擇計(jì)算 ......................................................................................................394.2.1 滑輪組倍率 ...........................................................................................................................394.2.2 鋼絲繩的設(shè)計(jì)計(jì)算 .............................................................................................................394.3 卷筒的設(shè)計(jì)計(jì)算 .............................................................................................................................414.4 起升機(jī)構(gòu)減速裝置的選型計(jì)算 ..................................................................................................474.5 制動(dòng)器的選擇 .................................................................................................................................484.6 基于 AMESim 起升機(jī)構(gòu)液壓系統(tǒng)仿真研究 ..........................................................................484.6.1AMEsim 軟件簡(jiǎn)介 ..............................................................................................................484.6.2 基于 AMEsim 系統(tǒng)仿真模型的建立 .............................................................................494.6.3 起升機(jī)構(gòu)液壓系統(tǒng)仿真結(jié)果分析 ..................................................................................514.6.4 起升機(jī)構(gòu)液壓系統(tǒng)改進(jìn) ....................................................................................................545 汽車起重機(jī)回轉(zhuǎn)機(jī)構(gòu)設(shè)計(jì) .....................................................................................................................595.1 回轉(zhuǎn)支承的設(shè)計(jì)計(jì)算 ....................................................................................................................595.1.1 回轉(zhuǎn)支承裝置分類 .............................................................................................................595.1.2 回轉(zhuǎn)支承裝置的受力分析 ...............................................................................................605.1.3 回轉(zhuǎn)支承裝置的選型 ........................................................................................................635.1.4 回轉(zhuǎn)支承裝置結(jié)構(gòu)尺寸 ....................................................................................................645.2 回轉(zhuǎn)驅(qū)動(dòng)裝置的設(shè)計(jì)計(jì)算 ...........................................................................................................655.2.1 回轉(zhuǎn)阻力矩的計(jì)算 .............................................................................................................655.2.2 驅(qū)動(dòng)裝置用液壓馬達(dá)選型 ...............................................................................................685.3 回轉(zhuǎn)中心距的確定 ...................................................................................................................696 汽車起重機(jī)轉(zhuǎn)臺(tái)設(shè)計(jì) ..............................................................................................................................706.1 轉(zhuǎn)臺(tái)具體結(jié)構(gòu)設(shè)計(jì) ........................................................................................................................716.2 轉(zhuǎn)臺(tái)的有限元分析計(jì)算 ...............................................................................................................716.2.1 轉(zhuǎn)臺(tái)有限元模型 .................................................................................................................716.2.2 計(jì)算工況 ...............................................................................................................................726.2.3 計(jì)算結(jié)果與分析 .................................................................................................................73結(jié)論 ............................................................................................................................76參考文獻(xiàn) .......................................................................................................................................................77附錄 ..........................................................................................................................................................78外文原文 ....................................................................................................................................................78中文譯文 ....................................................................................................................................................84致謝 ..........................................................................................................................................................95