毕业设计论文-数字液压阀系统设计.docVIP

摘 要 液压阀是流体传动中不可或缺的功能单元。一方面，流体传动系统的优化升级需要液压阀相应提高性能；另一方面，液压阀本身的创新也给流体系统带来了新的活力。如今，液压阀在体积、性能、能耗、智能化、制造加工工艺等方面都有了极大的发展。随着液压系统与电子技术、IT技术以及网络技术的融合，液压阀进入了数字化时代。液压数字阀是未来与比例阀、伺服阀相辅相争的一个全新的新阀种。它具有价格更低、更易与计算机相接、放大驱动装置更简单，而且体积更小的特点。看它的独特性能，在今后的市场上，势必将占有更大的份额！ 关键词：数字液压阀；步进电机；单片机控制；压力传感器反馈 Abstract The hydraulic valve is the indispensable part of function unit in the fluid drive. The fluid drive systems optimized promotion needs the hydraulic valve to enhance the performance correspondingly; On the other hand, hydraulic valves innovation also bring new vigor to the fluid system. Now, the hydraulic valve had enormous development in aspects volume, performance, energy consumption, intellectualized, manufacture processing craft and etc. Along with the hydraulic system, the electronic technology, the IT technology and networkings fusion, the hydraulic valve entered digital times. In the future, the hydraulic pressure digital valve will be a brand new valve which the proportioning valve, the servo valve auxiliary will contend with. It has the lower price , easier docking to the computer, simpler enlargement drive, moreover, the smaller volume. Its unique performance, will hold a bigger share inevitably in presents market! Keyboard：hydraulic valve；stepper motor；SCM Control；Pressure sensor feedback? 目录 第一章?绪论 1 ? 1.1目的和意义 --------------------------------------------------- 1 ? 1.2 国内外发展现状 ---------------------------------------------- 3 1.3 毕业设计的内容 ---------------------------------------------- 5 第二章 机械部分设计 ---------------------------------------------- 2.1 液压阀的选择 ------------------------------------------------- 6 7 2.2 步进电机的选择 ----------------------------------------------- 7 2.3 压力传感器的选择 --------------------------------------------- 2.4 改造图及说明 ------------------------------------------------- 第三章 控制系统硬件设计 -------------------------------------------- 9 10 13 3.1 89C51单片机的介绍 ------------------------------------------- 3.1.1 引脚简要说明 -----------------------------