复合式叶片密封接触压力和变形挤出的数值研究.doc

分分学学硕士论文硕士论文复合式叶片密封接触压力和变形挤出复合式叶片密封接触压力和变形挤出的数值研究的数值研究学位申请人学位申请人：：学学科科专专业业 ：：指指导导教教师师 ：：答答辩辩日日期期 ：：IA Dissertation Submitted in Partial Fulfillment of the Requirementsfor the Degree of Master in EngineeringNumerical Analysis of the Contact Pressure , Deformation and Extrusion of Composite Vane Seals Master Candidate：：Major：：Supervisor ：：Wuhan University of Science and TechnologyWuhan, Hubei 430081, P.R.ChinaMay, 2016II摘 要叶片式液压摆动油缸的叶片密封是影响其工作性能的关键因素复合式叶片密封由多种材料复合而成，受到预压缩和高压液压油作用后，其应力分布和变形情况极其复杂。

复合式叶片密封的接触压力和变形挤出情况对密封的可靠性和使用寿命有着重要影响本文以叶片式液压摆动油缸中的复合式叶片密封为研究对象，主要进行了以下研究1）根据复合式叶片密封的结构特点和材料特性，建立了复合式叶片密封应力应变的理论模型，探讨了其失效形式及其影响因素2）分别建立并求解了复合式叶片密封接触压力、变形和挤出的数学模型，基于 Matlab 编程，计算并分析了预压缩量、液压油压力、弹性模量、密封间隙和叶片密封尺寸等对其接触压力和变形挤出的影响3）建立了复合式叶片密封的有限元模型，计算了线性材料模型和非线性材料模型的应力、接触压力分布和变形情况，并将计算结果与数学模型的计算结果进行了对比，验证了数学模型的正确性关键词关键词：复合式叶片密封；接触压力；变形；挤出；有限元IIIAbstractThe vane seals of hydraulic rotary vane actuator(RVA) are the key factors affecting its work performance. The composite vane seals are compounded by a variety of materials. Under the action of pre-compression and high-pressure hydraulic oil, the stress distribution and deformation conditions of composite vane seals are extremely complex. The contact pressure, deformation and extrusion conditions of composite vane seals have an important influence on the seal reliability and service life.In this paper, the composite vane seals of RVA were taken as the research object, the main research is as follows.(1) According to the structural characteristics and material properties of composite vane seals, the theoretical model of stress and strain of composite vane seals was established, and the failure modes and their influence factors were discussed.(2) The mathematical models of contact pressure, deformation and extrusion of composite vane seals were established and solved. Based on Matlab programming, the influences of the pre-compression ratio, hydraulic oil pressure, elastic modulus, seal clearance and vane seals dimensions on the contact pressure, deformation and extrusion of vane seals were calculated and analysed.(3) The FEA models of composite vane seals were established, the distribution of stress, contact pressure and deformation conditions of linear material model and nonlinear material model were calculated, and the results were compared with the results of the mathematical model, to verify the correctness of the mathematical model.Keywords: Composite Vane Seal; Contact Pressure; Deformation; Extrusion; Finite Element Analysis 目目 录录IV摘 要....................................................................................................................................IABSTRACT.........................................................................................................................II第 1 章 绪论.........................................................................................................................11.1 课题的提出及研究意义.............................................................................................11.2 国内外研究现状.........................................................................................................21.3 本课题的主要研究内容.............................................................................................5第 2 章 叶片式液压摆动油缸的复合式叶片密封.............................................................72.1 复合式叶片密封的结构与作用.................................................................................72.2 复合式叶片密封的材料特性.....................................................................................82.3 复合式叶片密封应力应变的数值模型...................................................................102.4 复合式叶片密封的失效形式及其影响因素...........................................................12第 3 章 复合式叶片密封接触压力的数值研究...............................................................143.1 复合式叶片密封接触压力的数学模型...................................................................143.1.1 模型的建立........................................................................................................153.1.2 模型的求解........................................................................................................163.1.3 应力与接触压力分布解....................................................................................203.2 复合式叶片密封接触压力的影响因素...................................................................223.2.1 预压缩量对接触压力的影响............................................................................233.2.2 油压对接触压力的影响....................................................................................243.2.3 弹性模量对接触压力的影响............................................................................263.3 复合式叶片密封接触压力的有限元分析...............................................................273.3.1 有限元模型的建立............................................................................................283.3.2 有限元计算结果................................................................................................293.3.3 数值模型与有限元模型的计算结果对比........................................................32第 4 章。