發(fā)布時(shí)間：2018-06-27 16:04

  本文選題：氣門(mén)座圈 + 常溫壓裝�。� 參考：《重慶大學(xué)》2016年碩士論文

【摘要】：氣門(mén)座圈作為發(fā)動(dòng)機(jī)缸蓋上的一個(gè)重要零件,它與氣門(mén)頭部配合對(duì)氣缸起密封作用,用于控制新鮮空氣的吸入與廢氣的排除,其性能影響發(fā)動(dòng)機(jī)的油耗、功率、效率乃至壽命。氣門(mén)座圈的工作環(huán)境十分惡劣,除了承受高溫燃?xì)獾母g外,還要承受氣缸內(nèi)爆發(fā)壓力及氣門(mén)的高速?zèng)_擊。因此,氣門(mén)座圈壓裝工藝作為缸蓋裝配中重要的工藝過(guò)程,其壓裝質(zhì)量將直接影響發(fā)動(dòng)機(jī)的工作性能、輸出功率及使用壽命。本文首先介紹了氣門(mén)座圈壓裝的國(guó)內(nèi)外現(xiàn)狀,闡述了柴油機(jī)氣門(mén)座圈的結(jié)構(gòu)特點(diǎn)、工作原理及壓裝工藝。然后針對(duì)實(shí)際生產(chǎn)中某特定型號(hào)的柴油機(jī)氣門(mén)座圈凡爾線(xiàn)跳動(dòng)和真空試漏超差問(wèn)題進(jìn)行了分析,通過(guò)一系列對(duì)比試驗(yàn)最終確定了根本原因,并針對(duì)實(shí)際情況提出了具體改進(jìn)及解決措施,成功解決了工廠實(shí)際問(wèn)題。為了進(jìn)一步提高座圈壓裝效率和降低成本,提出了可以用常溫壓裝工藝代替冷凍壓裝工藝的改進(jìn)方法,通過(guò)與冷凍壓裝試驗(yàn)對(duì)比分析驗(yàn)證了常溫壓裝的可行性,并提出了用座圈周向應(yīng)變及力-位移曲線(xiàn)作為判斷常溫壓裝可靠性的標(biāo)準(zhǔn)。闡述了過(guò)盈配合理論及有限元分析理論基礎(chǔ),依據(jù)厚壁圓筒理論推導(dǎo)出的組合厚壁圓筒公式對(duì)氣門(mén)座圈過(guò)盈配合的數(shù)學(xué)模型進(jìn)行了理論計(jì)算,得到了氣門(mén)座圈過(guò)盈配合時(shí)的彈性力學(xué)解,并對(duì)其過(guò)盈配合強(qiáng)度進(jìn)行了校核。最后,介紹了過(guò)盈裝配非線(xiàn)性接觸問(wèn)題的求解方法及過(guò)盈量在ANSYS接觸中的正確設(shè)置方法,根據(jù)理論分析對(duì)氣門(mén)座圈壓裝過(guò)程進(jìn)行了有限元仿真,分析得到了壓裝過(guò)程中零件的應(yīng)力、應(yīng)變等情況,并通過(guò)ANSYS參數(shù)化編程得到了壓裝過(guò)程中的力-位移(F-S)曲線(xiàn)。本文針對(duì)柴油機(jī)氣門(mén)座圈的壓裝這一課題,通過(guò)試驗(yàn)研究成功解決了工廠實(shí)際問(wèn)題,并對(duì)壓裝工藝提出了改進(jìn)。在理論分析的基礎(chǔ)上利用有限元方法對(duì)過(guò)盈配合進(jìn)行了仿真分析,仿真分析結(jié)果與理論分析結(jié)果具有較好的一致性,充分說(shuō)明了有限元仿真分析的可行性,其結(jié)果可以為氣門(mén)座圈設(shè)計(jì)、壓裝工藝優(yōu)化、壓裝設(shè)備選擇及過(guò)盈量的選擇等提供參考依據(jù)。
[Abstract]:As an important part of the engine cylinder head, the valve seat ring plays a sealing role with the valve head to control the intake of fresh air and the removal of exhaust gas. Its performance affects the fuel consumption, power, efficiency and even life of the engine. The working environment of the valve seat ring is very bad. Besides the corrosion of the high temperature gas, it also has to withstand the burst pressure in the cylinder and the high speed impact of the valve. Therefore, as an important process in cylinder head assembly, the pressing quality of valve seat ring will directly affect the working performance, output power and service life of engine. This paper first introduces the present situation of valve seat ring pressing at home and abroad, and expounds the structure characteristics, working principle and pressing technology of the valve seat ring of diesel engine. Then, the paper analyzes the runout of valve seat ring and vacuum test leakage excess difference of a certain type of diesel engine in actual production, and finally determines the fundamental reason through a series of comparative tests. According to the actual situation, the concrete improvement and solving measures are put forward, and the practical problems of the factory are solved successfully. In order to further improve the efficiency and reduce the cost, an improved method which can replace the frozen pressing process with the normal temperature pressing process is put forward, and the feasibility of the normal temperature pressure packing is verified by comparing it with the frozen pressure loading test. The circumferential strain and the force-displacement curve of the pedestal ring are used as the criteria to judge the reliability of the pressure loading at room temperature. The theory of interference fit and the theoretical basis of finite element analysis are expounded. The mathematical model of the interference fit of valve seat ring is calculated theoretically according to the combined thick wall cylinder formula derived from the theory of thick wall cylinder. The elastic mechanical solution of the interference fit of valve seat ring is obtained, and the strength of interference fit is checked. Finally, the solution method of nonlinear contact problem of interference assembly and the correct setting method of interference quantity in ANSYS contact are introduced, and the finite element simulation of valve seat ring pressing process is carried out according to the theoretical analysis. The stress and strain of the parts in the process of pressing are analyzed, and the force displacement (F-S) curves are obtained by ANSYS parameterized programming. In this paper, the practical problems of the diesel engine valve seat ring are solved successfully through experimental research, and the improvement of the pressing process is put forward. On the basis of theoretical analysis, the interference fit is simulated by using finite element method. The simulation results are in good agreement with the theoretical analysis results, which fully shows the feasibility of finite element simulation analysis. The results can provide a reference for the design of valve seat ring, the optimization of pressing process, the selection of pressing equipment and the selection of interference.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TK423

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張躍江;;氣門(mén)與氣門(mén)座密封不良的診斷與檢修[J];農(nóng)機(jī)使用與維修;2014年06期

2 趙均海;朱倩;張常光;王蘇;;基于統(tǒng)一強(qiáng)度理論的組合厚壁圓筒彈塑性統(tǒng)一解[J];固體力學(xué)學(xué)報(bào);2014年01期

3 高明;;ANSYS后處理中節(jié)點(diǎn)反力的統(tǒng)計(jì)計(jì)算[J];電子世界;2013年03期

4 殷世福;陳國(guó)友;;發(fā)動(dòng)機(jī)缸蓋氣門(mén)座圈壓裝工藝[J];金屬加工(冷加工);2012年22期

5 孫愛(ài)民;賴(lài)智宇;丁雪婷;;發(fā)動(dòng)機(jī)缸蓋總成氣門(mén)密封性檢測(cè)研究[J];裝備制造技術(shù);2011年11期

6 敖文剛;王歆;;運(yùn)用統(tǒng)一強(qiáng)度理論分析預(yù)應(yīng)力組合圓筒分層半徑和過(guò)盈量[J];重慶工商大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年03期

7 張大鵬;羅布次仁;劉興萍;劉麗;;車(chē)輛輪軸過(guò)盈配合裝配應(yīng)力的一種非線(xiàn)性接觸有限元分析[J];西藏科技;2010年07期

8 孫友松;周先輝;黎勉;魏良模;黃開(kāi)勝;何宏肅;;交流伺服壓力機(jī)及其關(guān)鍵技術(shù)[J];鍛壓技術(shù);2008年04期

9 高興軍,趙恒華;大型通用有限元分析軟件ANSYS簡(jiǎn)介[J];遼寧石油化工大學(xué)學(xué)報(bào);2004年03期

10 朱遠(yuǎn)志;尹志民;曾渝;郝勇剛;;重型發(fā)動(dòng)機(jī)氣門(mén)座圈工藝、材料研究進(jìn)展[J];材料導(dǎo)報(bào);2004年05期

相關(guān)碩士學(xué)位論文 前8條

1 劉思聰;過(guò)盈聯(lián)接零件裝配的力-位移在線(xiàn)監(jiān)控系統(tǒng)的研究[D];重慶理工大學(xué);2015年

2 高飛虎;彈塑性理論在輪轂過(guò)盈裝配設(shè)計(jì)中的應(yīng)用[D];昆明理工大學(xué);2014年

3 劉楠;汽車(chē)發(fā)動(dòng)機(jī)氣缸蓋閥座壓裝機(jī)的研究與開(kāi)發(fā)[D];大連工業(yè)大學(xué);2014年

4 劉立波;缸蓋座圈導(dǎo)管加工技術(shù)研究與實(shí)踐[D];湖南大學(xué);2011年

5 馮垣潔;發(fā)動(dòng)機(jī)連桿襯套過(guò)盈裝配仿真及分析[D];中北大學(xué);2011年

6 董潔;輪軸過(guò)盈配合面的有限元分析[D];西南交通大學(xué);2010年

7 宋現(xiàn)鋒;大功率發(fā)動(dòng)機(jī)氣門(mén)座圈制造技術(shù)及其磨損特性研究[D];華南理工大學(xué);2010年

8 孫玲芳;機(jī)車(chē)輪對(duì)有限元分析及優(yōu)化設(shè)計(jì)[D];大連交通大學(xué);2005年

，

本文編號(hào)：2074465