液压阀毕业设计

液压阀毕业设计

篇一：毕业设计论文-数字液压阀的系统设计

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 system's optimized promotion needs the hydraulic valve to enhance the performance correspondingly; On the other hand, hydraulic valve's 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 networking's 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 xxputer, simpler enlargement drive, moreover, the smaller volume. Its unique performance, will hold a bigger share inevitably in present's 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---------------------------------------------- 6

2.1 液压阀的选择------------------------------------------------- 7

2.2 步进电机的选择----------------------------------------------- 7

2.3 压力传感器的选择--------------------------------------------- 9

2.4 改造图及说明------------------------------------------------- 10 第三章控制系统硬件设计-------------------------------------------- 13

3.1 89C51单片机的介绍------------------------------------------- 14

3.1.1 引脚简要说明------------------------------------------- 14

3.1.2 P3口的第二功能--------------------------------------- 15

3.2 步进电机工作原理的介绍--------------------------------------- 15

3.3 硬件部分设计

3.3.1 单片机电路-------------------------------------------- 16

3.3.2 反馈电路---------------------------------------------- 16

3.3.3 电路图------------------------------------------------- 17 第四章控制系统软件部分设计--------------------------------------- 19

4.1 环形脉冲分配------------------------------------------------ 20

4.2 步进电机的频率设定------------------------------------------ 21

4.3 89C51单片机源程序------------------------------------------ 21

第五章实验------------------------------------------------------- 25

5.1 实际实验----------------------------------------------------- 25

5.2实验步骤