中国矿业大学本科毕业设计说明书选读.docVIP

本科毕业设计说明书 纯水单体液压支柱三用阀的整体设计ON THE OVERRALL DESIGN OF THREE PURE WATER HYDRAULIC VALVE 学院（部）： 专业班级： 学生姓名： 指导教师： 年 月 日 纯水单体液压支柱三用阀的整体设计ON THE OVERRALL DESIGN OF THREE PURE WATER HYDRAULIC VALVE ABSTRACT The valve is easy to be corroded and a short time to use，that takes oil and emulsion as service fluid now.When pure water is used in the value，the time is longer.This article is on the use of three pure water value. In this article，we studied the key to the questions in many aspects to which the pure water value faces. The working medium is pure water in the value of three using .It is used in the pit machine .The whole and sparce parts is studied in this article. Static and change characteristics analysed use Simulink of Matlab to build the pattern. When using pure water，the value has many questions in those ways which is designing sizes and structure. We can narrow error class，recluce rough classect. In this way we can answer to the question of viscosity class reclucing. KEYWARDS：pure water， pure water value， Static characteristics, change characteristics 目录 摘要(中文)………………………………………………………………………………Ⅰ 摘要(外文)…………………………………………………………………………………Ⅱ 1绪论…………………………………………………………………1 1.1引言 …………………………………………………………2 1.2“纯水”的定义及分类………………………………………3 1.3 纯水液压传动所面临的技术挑战及对策……………………4 1.3.1 密封与润滑问题…………………………………………6 1.3.2 耐磨损问题………………………………………………7 1.3.3 耐腐蚀问题………………………………………………9 1.3.4 抗气蚀问题………………………………………………9 1.4 国内外研究应用现状与发展趋势……………………………9 1.4.1 研究应用现状分析………………………………………9 1.4.2 将来的发展趋势………………………………………10 1.5 三用阀的防腐性能…………………………………………11 1.5.1 三用阀的工作液采用纯水……………………………11 1.5.2 材料全部采用不锈钢…………………………………12 1.6 本文研究的内容……………………………………………12 2设计纯水液压阀时需要注意的问题………………………………13 2.1 纯水液压阀的研究现状……………………………………13 2.2 纯水液压阀面临的关键问题………………………………14 2.2.1 气蚀与气蚀磨损………………………………………14 2.2.2 拉丝侵蚀和冲蚀………………………………………15 2.2.3 泄露与效率……………………………………………16 2.2.4 压力冲击，震动与噪音…………………………………16 2.2.5 纯水液压元件气穴及其噪音问题……………………17 2.2.5 解决阀设计中存在的问题可从几个方面考虑………18