常州工学院毕业设计
CHANGZHOU INSTITUTE OF TECHNOLOGY
毕 业 设 计 说 明 书
题目： 单螺杆食品挤出机设计
二级学院（直属学部）： 无锡技师学院 专业： 数控车 学生姓名： 指导教师姓名： 评阅教师姓名：
班级： 学号： 职称： 职称：
2014 年03月
常州工学院毕业设计
摘 要
针对设计要求，对单螺杆食品挤出机进行了设计。主要包括传动系统、挤出系统、加料系统、冷却和加热系统的设计。此单螺杆挤出机是通过电机将动力传给带轮，经减速传给螺杆，为了满足变速范围的要求，采用普通电机加变频器进行无级调速。为了便于安装和拆卸，机筒采用的是左右剖分式结构，分三段进行加热和冷却。通过电磁阀和传感器进行温度的控制和冷却水的进出，保证温度在所允许的范围内。
关键词：单螺杆 挤出机 剖分式 冷却
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单螺杆食品挤出机设计
Abstract
According to the design requirement, the single screw food extruder is designed. Mainly comprises a transmission system, extrusion system, feeding system, the cooling and heating system design. The single screw extruder is through the motor transmits power to the belt wheel through a speed reducer, transmitted to a screw, in order to meet the requirements of speed range, the common motor with frequency converter for stepless speed regulation. In order to facilitate the installation and disassembly, barrel is based around a split structure, is divided into three parts for heating and cooling. Through an electromagnetic valve and a sensor for temperature control and cooling water import, ensure the temperature in the allowed range.
Keywords: single-screw extruder split cold
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常州工学院毕业设计
目 录
摘 要 ............................................................................................................................................................ 1 ABSTRACT .................................................................................................................................................. 2 目 录 .............................................................................................................................................................. 3 1 绪 论 .......................................................................................................................................................... 5 1.1 研究的意义 ......................................................................................................................................... 5 1.2 挤压技术的发展 ................................................................................................................................. 5 1.3 国内外发展的现状 ............................................................................................................................. 6 1.4 挤压加工的原理 ................................................................................................................................. 6 2方案设计 ..................................................................................................................................................... 8 2.1设计的要求 ......................................................................................................................................... 8 2.2 方案设计部分 ..................................................................................................................................... 8 2.2.1 方案的整体确定 ......................................................................................................................... 8 2.2.2 机筒与螺杆材料的选择 ............................................................................................................. 9 3 设计计算 .................................................................................................................................................. 10 3.1 传动系统设计 ................................................................................................................................... 10 3.1.1 电机的选择 ............................................................................................................................... 10 3.1.2 传动比的分配 ........................................................................................................................... 10 3.2 螺杆的设计 ....................................................................................................................................... 12 3.3 齿轮的设计 ....................................................................................................................................... 15 3.3.1 输入轴上齿轮的设计 ............................................................................................................... 15 3.3.2 Ⅱ轴Ⅲ轴上一对齿轮的设计 ................................................................................................... 18 3.3.3 计算输出轴上的小齿轮 ........................................................................................................... 22 3.4 轴的计算 ........................................................................................................................................... 25 3.5 带轮计算 ........................................................................................................................................... 26 3.5.1 确定计算功率Pca .................................................................................................................... 26 3.5.2 选窄V带带型 .......................................................................................................................... 26 3.5.3 确定带轮的基准直径 ............................................................................................................... 26 3.5.4 确定窄V带的基准长度和中心距 .......................................................................................... 26 3.5.5 包角 .......................................................................................................................................... 27 3.5.6 计算根数................................................................................................................................... 27 3.6 轴的校核 ........................................................................................................................................... 27 4 冷却装置 .................................................................................................................................................. 31
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