挖掘机中央回转接头轴体结合部密封性能研究
发布时间：2018-11-14 08:58
【摘要】：中央回转接头是挖掘机的关键部件,保证其长期有效地工作具有重大的意义。但在实际工程应用中,中央回转接头轴体结合部0形密封圈经常发生密封失效的现象,导致严重的泄漏问题。本文旨在对中央回转接头轴体结合部O形圈密封性能展开研究,确定影响其密封性能的主要影响因素,为中央回转接头轴体结合部O形圈密封设计与优化提供参考依据。 本文主要的研究工作： (1)介绍了O形圈密封的结构参数,论述了O形圈密封的密封原理,阐述了O形密封圈的摩擦、磨损,概括了决定密封性能的主要因素,分析总结了O形圈密封的失效模式。 (2)确定橡胶材料的本构模型,利用有限元分析软件Abaqus建立O形圈静、动密封仿真模型,对比复杂三维旋转密封模型与简化二维静密封模型的仿真结果,分析提出使用二维简化模型进行仿真研究的可行性,在此基础上分析密封性能的诸多影响因素,并利用正交试验法研究此类因素对密封性能的影响规律。 (3)在第二章研究结论的基础上,建立O形圈旋转密封摩擦热仿真模型,考察压缩率、环境温度等因素对O形圈温度场的影响,指出中央回转接头轴体结合部O形圈发生局部高温失效的可能作用机制。 (4)在本文研究过程中,实验数据主要来自于主机厂的使用反馈,为获得更为详细的数据信息,深化研究工作,设计开发了中央回转接头密封性能对比试验台,目前已完成试验台的设计与理论验证工作。
[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.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU621
本文编号：2330716
[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.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU621
【参考文献】
相关期刊论文 前10条
1 胡殿印,王荣桥,任全彬,洪杰;橡胶O形圈密封结构的有限元分析[J];北京航空航天大学学报;2005年02期
2 陈国定,Haiser H,Haas W,Lechner G;O形密封圈的有限元力学分析[J];机械科学与技术;2000年05期
3 陈占清;詹永麒;朱昌明;;压缩率对O形橡胶密封圈密封性能的影响[J];流体传动与控制;2007年02期
4 蒋京,夏群生,余志生;盘式制动器重复制动温度计算[J];汽车工程;1996年03期
5 邵天敏;旋转密封○形圈最小过盈量的确定[J];润滑与密封;1994年05期
6 王伟,赵树高;橡胶O形密封圈的非线性有限元分析[J];润滑与密封;2005年04期
7 王贵一;橡胶的磨耗[J];特种橡胶制品;1994年01期
8 鲁选才;贺永军;杨维章;吕斌杰;原磊;;旋转轴唇形密封圈的设计与选材[J];特种橡胶制品;2010年05期
9 郑明军,王文静,陈政南,吴利军;橡胶Mooney-Rivlin模型力学性能常数的确定[J];橡胶工业;2003年08期
10 夏元白,蒋春梅,吕治忠;钻井泵活塞接触应力分析[J];西南石油学院学报;2004年01期
，本文编号：2330716
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