發(fā)布時(shí)間：2018-11-14 08:58

【摘要】：中央回轉(zhuǎn)接頭是挖掘機(jī)的關(guān)鍵部件,保證其長(zhǎng)期有效地工作具有重大的意義。但在實(shí)際工程應(yīng)用中,中央回轉(zhuǎn)接頭軸體結(jié)合部0形密封圈經(jīng)常發(fā)生密封失效的現(xiàn)象,導(dǎo)致嚴(yán)重的泄漏問(wèn)題。本文旨在對(duì)中央回轉(zhuǎn)接頭軸體結(jié)合部O形圈密封性能展開(kāi)研究,確定影響其密封性能的主要影響因素,為中央回轉(zhuǎn)接頭軸體結(jié)合部O形圈密封設(shè)計(jì)與優(yōu)化提供參考依據(jù)。 本文主要的研究工作： (1)介紹了O形圈密封的結(jié)構(gòu)參數(shù),論述了O形圈密封的密封原理,闡述了O形密封圈的摩擦、磨損,概括了決定密封性能的主要因素,分析總結(jié)了O形圈密封的失效模式。 (2)確定橡膠材料的本構(gòu)模型,利用有限元分析軟件Abaqus建立O形圈靜、動(dòng)密封仿真模型,對(duì)比復(fù)雜三維旋轉(zhuǎn)密封模型與簡(jiǎn)化二維靜密封模型的仿真結(jié)果,分析提出使用二維簡(jiǎn)化模型進(jìn)行仿真研究的可行性,在此基礎(chǔ)上分析密封性能的諸多影響因素,并利用正交試驗(yàn)法研究此類(lèi)因素對(duì)密封性能的影響規(guī)律。 (3)在第二章研究結(jié)論的基礎(chǔ)上,建立O形圈旋轉(zhuǎn)密封摩擦熱仿真模型,考察壓縮率、環(huán)境溫度等因素對(duì)O形圈溫度場(chǎng)的影響,指出中央回轉(zhuǎn)接頭軸體結(jié)合部O形圈發(fā)生局部高溫失效的可能作用機(jī)制。 (4)在本文研究過(guò)程中,實(shí)驗(yàn)數(shù)據(jù)主要來(lái)自于主機(jī)廠的使用反饋,為獲得更為詳細(xì)的數(shù)據(jù)信息,深化研究工作,設(shè)計(jì)開(kāi)發(fā)了中央回轉(zhuǎn)接頭密封性能對(duì)比試驗(yàn)臺(tái),目前已完成試驗(yàn)臺(tái)的設(shè)計(jì)與理論驗(yàn)證工作。
[Abstract]:The central rotary joint is the key component of excavator. It is of great significance to ensure its long-term and effective work. But in the practical engineering application, the sealing failure of the 0-shape sealing ring in the shaft joint of the central rotary joint often occurs, which leads to the serious leakage problem. The purpose of this paper is to study the sealing performance of O-ring seal in shaft joint of central rotary joint, to determine the main influencing factors, and to provide a reference for the design and optimization of O-ring seal in shaft joint of central rotary joint. The main research work of this paper is as follows: (1) the structural parameters of O-ring seal are introduced, the sealing principle of O-ring seal is discussed, the friction and wear of O-ring seal is expounded, and the main factors that determine the sealing performance are summarized. The failure mode of O-ring seal is analyzed and summarized. (2) the constitutive model of rubber material is determined, the simulation model of O-ring static and dynamic seal is established by using finite element analysis software Abaqus, and the simulation results of complicated three-dimensional rotating seal model and simplified two-dimensional static seal model are compared. The feasibility of using two-dimensional simplified model to simulate the seal performance is analyzed. Based on this, many factors affecting the seal performance are analyzed, and the law of the influence of these factors on the seal performance is studied by orthogonal test. (3) based on the conclusion of the second chapter, the friction thermal simulation model of O-ring rotary seal is established, and the influence of compression ratio and ambient temperature on the temperature field of O-ring is investigated. The possible mechanism of local high temperature failure of O-ring in shaft joint of central rotary joint is pointed out. (4) in the course of this research, the experimental data mainly come from the main engine factory's use feedback. In order to obtain more detailed data information and deepen the research work, a comparative test bed for the sealing performance of the central rotary joint is designed and developed. At present, the design and theoretical verification of the test bench have been completed.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU621

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 胡殿印,王榮橋,任全彬,洪杰;橡膠O形圈密封結(jié)構(gòu)的有限元分析[J];北京航空航天大學(xué)學(xué)報(bào);2005年02期

2 陳國(guó)定,Haiser H,Haas W,Lechner G;O形密封圈的有限元力學(xué)分析[J];機(jī)械科學(xué)與技術(shù);2000年05期

3 陳占清;詹永麒;朱昌明;;壓縮率對(duì)O形橡膠密封圈密封性能的影響[J];流體傳動(dòng)與控制;2007年02期

4 蔣京,夏群生,余志生;盤(pán)式制動(dòng)器重復(fù)制動(dòng)溫度計(jì)算[J];汽車(chē)工程;1996年03期

5 邵天敏;旋轉(zhuǎn)密封○形圈最小過(guò)盈量的確定[J];潤(rùn)滑與密封;1994年05期

6 王偉,趙樹(shù)高;橡膠O形密封圈的非線性有限元分析[J];潤(rùn)滑與密封;2005年04期

7 王貴一;橡膠的磨耗[J];特種橡膠制品;1994年01期

8 魯選才;賀永軍;楊維章;呂斌杰;原磊;;旋轉(zhuǎn)軸唇形密封圈的設(shè)計(jì)與選材[J];特種橡膠制品;2010年05期

9 鄭明軍,王文靜,陳政南,吳利軍;橡膠Mooney-Rivlin模型力學(xué)性能常數(shù)的確定[J];橡膠工業(yè);2003年08期

10 夏元白,蔣春梅,呂治忠;鉆井泵活塞接觸應(yīng)力分析[J];西南石油學(xué)院學(xué)報(bào);2004年01期

，

本文編號(hào)：2330716