毕业设计（论文）-400KW真空氮化烧结炉电气控制系统的设计精选.doc

毕业论文（设计）题 目： 摘 要 真空脉冲氮化炉氮化工艺是在低真空状态下进行，自动变压换气，使炉罐内每一个角落的气氛保持新鲜、活性，具有速度快，炉内气氛均匀性好。炉子密封性好硬度高装炉量大、加工成本低脆性低工艺稳定操作简单残余氨气经真空泵抽至密封水箱处理后排出，残余氨气与水箱中的FeSO4消除后排出，对大气不造成污染，节能环保型产品400KW vacuum nitriding sintering furnace electrical control system design Abstract Vacuum pulse nitriding furnace nitride in low vacuum condition, the automatic pressure ventilation, so that the furnace tank every corner of atmosphere fresh keeping, activity, has the advantages of fast speed, good uniformity of furnace atmosphere. The stove has good sealing property, high hardness, loading capacity of large, low processing cost, low brittleness, process stability, simple operation, residual ammonia by vacuum pump to a sealing water tank is discharged after the treatment, the residual ammonia and water tank in the FeSO4eliminated after discharge, the atmosphere does not cause pollution, to achieve energy conservation and environmental protection products. This combination of electrical engineering automatic control method, put forward to the PLC as the core of automatic control, to build a PLC as the center controller respectively controls each control system automatic control system, the vacuum nitriding furnace electrical control system design of the conclusion. The design consists of four parts, the first part: absolute indication and alarm design, part second: temperature detecting and monitoring design, part third: vacuum system design, part fourth: positive and negative voltage of the electrical control system design, design in strict accordance with the relevant standards and rules and designBriefly Keywords: nitriding furnace PLC automatic control 目 录 1 绪论 1 1.1 课题研究的背景 1 1.2 400KW真空氮化烧结炉电气控制系统的设计的目的和意义 2 1.2.1 400KW真空氮化烧结炉电气控制系统的设计研究的目的 2 1.2.2 400KW真空氮化烧结炉电气控制系统的设计研究的意义 2 1.3 本设计的任务 2 2 系统方案论证 4 2.1 系统总体设计框架 4 2.2 系统方案论证 4 2.2.1 控制电路核心部分 4 2.2.2 控制器模块部分 4 2.2.3 无水指示报警部分 6 2.2.4 抽真空控制部分 6 2.2.5 风机降温排风部分 6 3 系统硬件设计 7 3.1 可编程逻辑控制器介绍 7 3.2 硅钼棒介绍 14 3.3 PID介绍 15 3.4 支