论文总字数：22623字

摘 要

本设计为发酵罐搅拌轴的优化设计，本次设计主要研究机械搅拌通风发酵罐。筒体内的介质为1，2-二氯丙烷和1，3-二氯丙烯液体，夹套内介质为水蒸汽。通过推进式搅拌器将筒体内两种介质充分混合、搅拌。

本设计的设计内容包括：搅拌器搅拌功率的计算，搅拌轴结构的设计与其直径的校核，对搅拌轴在相同粘度，直径，材料等情况下，空心轴与实心轴在临界转速，剪切力等方面的直观对比，本设计选取单跨轴模型，分析在实心轴的情况下直径等因素对临界转速，剪切力的影响，最后对搅拌轴进行优化设计。

关键词：搅拌器搅拌轴；实心轴；空心轴；优化

Optimal design of stirred shaft for fermenting tank

Abstract

The design is vertical propeller type agitator design. Tube in medium is 1,2-acetone dichloride and 1,3-dichloropropylene liquids, the medium in the Clamp cover is the steam. Through propeller type agitator makes the two medium intensive mixing and agitating in the tube.

The design content of this design includes: mixing power calculation, stirring shaft structure design with the diameter of the check, the mixing shaft with the same viscosity, diameter, material, hollow shaft and a solid shaft at the critical speed, shear force of visual comparison, the design selected single cross shaft model and analysis in solid shaft diameter and other factors on the critical speed, the influence of shear stress. At last, it makes the optimization design of the mixing shaft.

Key Words:: Agitator; design; calculation; solid shaft: hollow axis: optimization

目 录

第一章 绪论...........................................................................................................................1

1.1搅拌设备在工业中的应用...............................................................................................1

1.2发酵罐...............................................................................................................................2

1.3发酵罐搅拌器...................................................................................................................5

1. 4 搅拌轴的设计要求....................................................................................................... 8

1. 5 搅拌过程........................................................................................................................ 9

1. 6 力学模型.......................................................................................................................10

1. 7 本设计的选型及设计条件.......................................................................................... 12

第二章 搅拌器功率的计算.................................................................................................14

2.1搅拌器功率准数的计算.................................................................................................14

2.2算图法计算...............................................................................................................15

2.2.1的计算......................................................................................................................15

2.2.2影响搅拌功率的因素...................................................................................................16

2.3搅拌功率P的计算..........................................................................................................17

第三章 搅拌轴的设计与校核.............................................................................................18

3.1搅拌轴的力学模型..........................................................................................................18

3.2轴的结构设计..................................................................................................................18

3.3搅拌轴直径设计..............................................................................................................19

3.3.1按最大扭矩计算搅拌轴直径.......................................................................................20

3.3.2扭矩和弯矩合成计算搅拌轴直径...............................................................................20

3.3.2.1计算尺寸的确定........................................................................................................20

3.3.2.2由径向力引起的轴上弯矩........................................................................................22

3.3.2.3由轴向推力引起的轴上弯矩....................................................................................22

3.3.2.4轴上扭矩和弯矩同时作用下的当量弯矩................................................................22

3.3.2.5扭矩和弯矩同时作用下的计算轴径........................................................................22

3.3.3按临界转速计算轴径...................................................................................................23

4简化分析.............................................................................................................................24

4.1单跨轴实心光轴的临界转速..........................................................................................24

4.1.1 利用vb进行计算........................................................................................................24

4.1.2 流程图.........................................................................................................................25

4.2单跨轴实心光轴的剪应力......................................................................................................26

4..2.1用vb进行计算.....................................................................................................................26

4.3实心轴于空心轴的比较 ........................................................................................................28

4.3.1强度计算...............................................................................................................................28

4.3.2抗震计算...............................................................................................................................28

1. 总结.................................................................................................................................29

参考文献.......................................................................................................................................30

第一章 绪论

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