摘要：本课题的步进加药系统是一个以步进电机为驱动、将信号反馈到液压端、并且能按要求完成加药任务的自动化系统；同时它也是振动清洗系统的辅助系统。
这个系统的工作顺序是：步进电机驱动器发出脉冲和信号，步进电机接受脉冲后按要求转动，带动滚珠丝杠螺母副从而在导轨的导向下将转动变为药缸活塞杆的直线运动，而药缸活塞杆的直线运动致使药缸通过管道和单向阀来完成吸药和加药运动。5916
系统的设计分析主要包括液压端的单向阀、药箱以及药缸的设计；传动装置中滚珠丝杠螺母副、导轨和联轴器等部分的选择和设计；驱动装置主要是步进电机以及其支架的选型和设计。总体上，需要根据流量和时间等要求，完成以上各个部分的任务，并在最后将整个系统置进行综合的讨论和分析。相比于以往的加药系统，本次设计进行了优化，将单向阀设计为可以调整开启压力的特殊单向阀，从而方便的控制吸药和压药两个动作。
关键词：步进；加药；滚珠丝杠螺母副；单向阀；开启压力。
Design of stepping dosing system
Abstract：The stepping dosing system of this object is an automation system which use a stepping motor to drive,transferring Signal back to the hydraulic system and dosing in a proper way. At the same time it is also a auxiliary system for vibration cleaning system.
The process of the system is as follows: At frist,stepper motor driver send pulse and the signal.moreover,the stepper motor will receive the signal and make the required rotation.So the ball screw nut and the piston of drug cylinder can be led into a linear motion,and this motion is limited by the slideway,it can also complete the sucking and dosing movement though pipes and check valve.
The Design and analysis of this system mainly includes the design of check valve and remedy container as well as the design of the drug cylinder of the hydraulic side; the design of the ball screw nut, the guide rail and coupling portion of transmission system; the selection of stepper motor and the design of its bracket.Overall,it is important to complete the task according to the requirements of the flow and time , and make a discussion and analysis of the entire vibration.Comparing with the previous dosing system, this design make a optimization, check valve designed to be a special one so that opening pressure can be adjusted easily . And it can ensure the sucking and dosing movement conveniently.
Key Words：stepping ;dosing ;ball screw nut ;check valve ;opening pressure
目录
一、 绪论 1
1.1 研究的目的和意义 1
1.2 研究课题的国内外现状和发展趋势 1
1.2.1 定量灌装包装产业 2
1.2.2 应用定量加液的清洗产业 2
1.3 课题涉及的内容以及模型分析 3
1.3.1典型简易定量加液系统模型 3
1.3.2 药缸的介绍和相关分析 3
1.3.3 单向阀的介绍和相关分析 4
1.3.4 滚珠丝杠螺母副的介绍和相关分析 4
1.4 步进加药系统的设计内容和技术要求 5
1.5 本课题的重点和难点 5
1.5.1 课题设计的重点 5
1.5.2 课题设计的难点 6
二、 方案论证和比较 7
2.1 液压元件特殊应用材料的选择 7
2.2 驱动方案的选择 7
2.3传动机构连接方式的选择 8
2.4步进电机型号、药缸类型、单向阀类型以及控制方式的选择 9
三、 系统元件结构的计算分析和设计 10 步进加药系统设计+CAD图纸:http://www.751com.cn/fanyi/lunwen_3200.html