复合式叶片密封接触压力和变形挤出的数值研究-机械工程专业论文.docxVIP

II万方数据 II 万方数据 Abstract The vane seals of hydraulic rotary vane actuator(RVA) 町e 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. 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. 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 ofvane seals were calculated and analysed. The FEA models of composite vane seals were established ，the distribution of s位ess，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 veri命 the correctness of the mathematical model. Keywords: Composite Vane Seal; Contact Pressure; Deformation; Ex位usion; Finite Element Analysis III万方数据 III 万方数据 目录 摘要 1 ABSTRACT ……… …….. II 第 1 章绪论… ..… 1 1.1 课题的提出及研究意义…………… …… ..1 1.2 国内外研究现状 2 1.3 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 ...…… 6 2.1复合式叶片密封的结构与作用 ...……… 6 2.2 复合式叶片密封的材料特性 7 2.3复合式叶片密封应力应变的数值模型…·… 9 2.4复合式叶片密封的失效形式及其影响因素 11 第 3 章复合式叶片密封接触压力的数值研究 13 3.1 复合式叶片