机械5

摘要:本文主要介绍了发酵罐的主要设计步骤。在工艺计算中，大致计算了发酵罐筒体的筒径，高度。选定了封头形状，确定了夹套高度和搅拌桨叶的分布。对搅拌功率进行了试算，选定了电机功率。参照相关的标准和参考资料对发酵罐受内外压情况下的筒体壁厚，封头壁厚，受内压的夹套壁厚进行设计计算。对支座，凸缘，安装底盖，法兰，人孔等进行了选型。参考《机械搅拌设备》对搅拌桨进行了设计和强度校核。同时，按扭转变形，根据临界转速，强度计算，和轴封处允许的径向位移四种方法对轴径进行计算和强度校核。参照国标规则，运用等面积补强的方法对接管开孔进行了开孔补强，最后对搅拌设备的制造，检验安装进行了简要说明 设计结果：设计出了工作容积为10m3的发酵罐，筒体材料为，内筒壁厚为，内径为，夹套厚度为。筒体高度，采用机械密封及三层搅拌桨形式搅拌。机架采用机械密封和单点支架的配合，支座采用支撑式支座支座。搅拌轴轴径为。 关键词：发酵罐；搅拌桨；搅拌轴；强度校核；开孔补强 The desig
n of 10 cubic meters ferme
ntatio
n ta
nk Abstract:Ferme
ntatio
n tech
nology has become a
n i
ndispe
nsable tech
nology i
n food, chemical a
nd pharmaceutical i
ndustries.Besides,the Ferme
ntatio
n ta
nk takes a large place i
n Ferme
ntatio
n process. The mai
n steps i
n the desig
n of a 10 cubic meter ferme
nter are detailed i
ntroduced i
n this paper,a
nd I choose the desig
n a
nd stre
ngth check of the agitator shaft as my mai
n research directio
n.I
n my opi
nio
ns,my research will have a certai
n sig
nifica
nce i
n practical e
ngi
neeri
ng desig
n. I
n the process calculatio
n, the diameter a
nd height of the cyli
nder of the ferme
ntor were roughly calculated.I
n this part,i has also sclected the shape of the head a
nd have co
nfirmed the height of the jack,the positio
n of the impeller. the stirri
ng power was calculated a
nd the motor power was selected.With refere
nce to the releva
nt sta
ndards a
nd refere
nce materials, the wall thick
ness of the cyli
nder, the wall thick
ness of the head, a
nd the wall thick
ness of the jacket subjected to i
nter
nal pressure are desig
ned a
nd calculated for the ferme
nter u
nder the co
nditio
ns of i
nter
nal a
nd exter
nal pressure.Also,I desig
ned a
nd checked the stre
ngth of the mixi
ng paddle.The type of beari
ng, fla
nge, bottom cover, fla
nge a
nd ma
nhole are selected.At the same time, accordi
ng to the four ways,i
ncludi
ng torsio
nal deformatio
n, the critical speed, stre
ngth calculatio
n, a
nd the radial displaceme
nt allowed at the shaft seal, I calculate the shaft diameter a
nd check the stre
ngth.With refere
nce to the
natio
nal sta
ndard rules, the ope
ni
ng of the
nozzle was rei
nforced by the method of equal area rei
nforceme
nt.I
n the e
nd, I did a simple i
ntroductio
n about the ma
nufacture, i
nspectio
n a
nd i
nstallatio
n of the mixi
ng equipme
nt. Desig
n result: I have desig
ned a ferme
ntatio
n ta
nk with a worki
ng volume of 10.The cyli
nder body material is S30408. The i
n
ner wall thick
ness is 14mm.The i
n
ner diameter is 1800mm a
nd the height of the cyli
nder body is 3900mm.The equipme
nt is mecha
nically sealed a
nd stirred i
n the form of a three-layer mixi
ng paddle.The rack is equipped with a mecha
nical seal a
nd a si
ngle poi
nt bracket, a
nd the support is supported by a support bracket a
nd the stir shaft diameter is 130mm. Key words: Ferme
ntatio
n ta
nk;impeller;Agitator shaft;Stre
ngth Check;Rei
nforceme
nt 目录 中文摘要Ⅰ 英文摘要Ⅱ 目录Ⅲ 1前言1 1.1设计任务1 1.2发展趋势1 1.3结构和材料选择1 2工艺计算2 2.1确定筒体内径2 2.2确定上下封头几何参数2 2.3重新确定筒体高度2 2.4轴封损耗功率计算3 2.5单个搅拌桨功率计算3 2.6三层搅拌桨功率计算4 2.7接管计算5 2.8搅拌罐工艺参数5 3结构强度计算6 3.1受内压的筒体壁厚计算6 3.2受外压的筒体壁厚计算6 3.3封头内压计算10 3.4封头外压计算11 3.5带夹套筒体的壁厚计算12 3.6带夹套封头的壁厚计算12 3.7支座选择13 3.8法兰的选择16 3.9安装底盖的选用17 3.10机架的选择18 3.10人孔选择19 3.11密封形式20 4搅拌轴设计21 4.1按扭转变形计算搅拌轴直径21 4.2根据临界转速校核搅拌轴轴径21 4.2.1搅拌轴有效质量计算21 4.2.2圆盘有效质量计算22 4.2.3单跨轴一阶临界转速的计算23 4.3按强度计算搅拌轴的轴径25 4.4应按轴封处允许径向位移验算轴径28 5搅拌桨计算29 5.1确定搅拌桨设计功率29 5.2每层搅拌桨的设计功率29 5.3搅拌桨桨叶材料的许用应力30 5.4圆盘涡轮式搅拌桨计算30 6接管开孔补强31 7制造、检验、安装、使用、维修38 7.1轴的加工要求38 7.2搅拌器加工要求38 7.3搅拌设备壳体的制造要求及检验38 7.4搅拌轴的试运转38 8结束语39 参考文献40 致谢41