6105發(fā)動(dòng)機(jī)活塞連桿的設(shè)計(jì)與計(jì)算

車(chē)輛工程專(zhuān)業(yè)畢業(yè)論文，論文編號(hào):JX895  論文字?jǐn)?shù):12829.頁(yè)數(shù):40

摘     要
   
 當(dāng)今環(huán)境問(wèn)題已經(jīng)成為相當(dāng)嚴(yán)重的一個(gè)問(wèn)題了，而汽車(chē)的尾氣是環(huán)境污染的一個(gè)主要來(lái)源。隨著廢氣排放標(biāo)準(zhǔn)越來(lái)越高，導(dǎo)致了要對(duì)汽車(chē)進(jìn)行很多的改進(jìn)。活塞連桿組就是改進(jìn)的一部分。活塞連桿組是發(fā)動(dòng)機(jī)的重要組成部件，其結(jié)構(gòu)直接影響發(fā)動(dòng)機(jī)的動(dòng)力性、燃油經(jīng)濟(jì)性以及廢氣排放。另外隨著各種不可再生資源日益短缺，活塞連桿組的耐久性也亟待提高。
 本文結(jié)合了大量文獻(xiàn)資料，以及國(guó)內(nèi)外活塞連桿組結(jié)構(gòu)的發(fā)展趨勢(shì)，對(duì)6105發(fā)動(dòng)機(jī)的活塞連桿總成進(jìn)行了設(shè)計(jì)。充分考慮所受的各種作用力，分別對(duì)活塞、活塞環(huán)、活塞銷(xiāo)、連桿進(jìn)行了結(jié)構(gòu)選擇及布置、材料選用以及重要尺寸參數(shù)的設(shè)計(jì)計(jì)算，并對(duì)活塞連桿組的危險(xiǎn)部位如活塞銷(xiāo)、連桿桿身等進(jìn)行了強(qiáng)度校核，使設(shè)計(jì)的活塞連桿總成結(jié)構(gòu)合理、輕量化、可靠耐久，從而提高6105發(fā)動(dòng)機(jī)的燃油經(jīng)濟(jì)性，降低廢氣排放，在現(xiàn)實(shí)生活中具有一定的實(shí)用價(jià)值。
 
關(guān)鍵詞： 活塞；連桿；活塞銷(xiāo)；設(shè)計(jì)；強(qiáng)度校核

Abstract
 Now the environment question has already became a quite serious problem, and the automobile exhaust is the main component of the environmental pollution. The  emission standards getting higher and higher, which causes the car requiring to be improved.The piston and connecting rod assembly is a part of which need improvement. It is principal  to the automobile engine, which structure would have a directly impact on the engine’s power, the fuel economy and the exhaust emission. In addition, because the unrenewable resources is gradually diminishing, the durability of the piston and connecting rod assembly also should be increase.
 Combining considerable amount of literatures with the trend of development of the piston and connecting rod assembly at home and abroad, this paper carried on the design to the 6105 engine's piston and connecting rod assembly. Considered each kind of load the assembly parts enduring, this paper design the assembly parts individually. The primary coverage includes choseing the compatible structure and the proper material for the piston,the piston ring,the piston pin and the connecting rod, calculating the important size parameter, examinating the intensity of the dangerous spot ,such as the piston pin and the rod. the main purpse is to ensure the structure of the assembly is reasonable,has a lightweight, durable and reliable, thereby enhances the fuel economy and reduces the exhaust emission of the 6105 engine. In the daily life,it has a certain practiality. 

Keywords: Piston  Connecting rod  Piston pin  Design  Intensity examination
 
目  錄

摘 要 ⅰ
Abstract ⅱ
目 錄 ⅲ
第一章 緒論 1
1.1研究動(dòng)機(jī)與目的 1
1.2 研究背景 1
1.3 研究方法與描述 2
1.4 論文內(nèi)容概述 2
第二章 活塞連桿組的布置 4
2.1活塞 4
2.1.1  活塞的功用 4
2.1.2  活塞結(jié)構(gòu) 5
2.2 活塞環(huán) 6
2.2.1  氣環(huán) 6
2.2.2 油環(huán) 6
2.3 活塞銷(xiāo) 7
2.4 連桿 7
2.4.1  連桿的功用及工作條件 7
2.4.2  連桿構(gòu)造 8
第三章 活塞組設(shè)計(jì) 10
3.1 活塞材料 10
3.2 燃燒室 11
3.3 活塞頭部的設(shè)計(jì) 12
3.3.1 壓縮高度的確定 12
3.3.2 頭部細(xì)環(huán)形槽 13
3.4 活塞裙部設(shè)計(jì) 14
3.4.1裙部高度 14
3.4.3 活塞銷(xiāo)座 16
3.4 活塞總高度 18
3.5 活塞銷(xiāo) 19
第四章 連桿組設(shè)計(jì) 21
4.1 連桿材料 21
4.2 連桿長(zhǎng)度的確定 21
4.3 連桿小頭結(jié)構(gòu)設(shè)計(jì) 22
4.4 連桿桿身結(jié)構(gòu)設(shè)計(jì) 22
4.5 連桿大頭結(jié)構(gòu)設(shè)計(jì) 23
第五章 強(qiáng)度校核 25
5.1 初始參數(shù) 25
5.2 載荷及其處理 25
5.2.1燃?xì)庾饔昧?nbsp;25
5.2.2活塞連桿組的慣性力 25
5.3 活塞銷(xiāo)強(qiáng)度校核 26
5.3.1 活塞銷(xiāo)、銷(xiāo)座比壓 26
5.3.2活塞銷(xiāo)的彎曲應(yīng)力 27
5.3.3 活塞銷(xiāo)的剪應(yīng)力 28
5.3.4活塞銷(xiāo)的最大變形與變形后的應(yīng)力 28
5.4 連桿強(qiáng)度校核 28
5.4.1連桿小頭的強(qiáng)度計(jì)算 28
5.4.2 連桿桿身的強(qiáng)度計(jì)算 30
第六章  總 結(jié) 34
參考文獻(xiàn) 35
致  謝 36