1. Taw qhia
Twin-shaft mixers yog dav siv hauv pob zeb, qhuav mortar, tshuaj, thiab kev tiv thaiv ib puag ncig kev lag luam vim lawv qhov zoo ntawm lub zog shearing quab yuam, tsis sib tov cov fab tuag, thiab kev sib xyaw ua haujlwm siab. Raws li cov khoom tseem ceeb ntawm cov khoom sib tov, cov hniav ncaj qha koom nrog cov txheej txheem ntawm cov khoom thawb, shearing, ntuav, thiab convection. Nws cov yam ntxwv tsis zoo (thickness, dav, lub kaum sab xis, thiab lwm yam) txiav txim siab cov khoom ntws hauv lub xeev thiab sib tov zoo. Ntawm lawv, cov hniav tuab tsis yog tsuas yog cuam tshuam rau cov txheej txheem rigidity thiab hnav tsis kam, tab sis tseem cuam tshuam ncaj qha rau cov khoom sib xyaw ua ke, lub zog shear, thiab lub zog noj. Yog li ntawd, kev tshawb nrhiav qhov cuam tshuam ntawm cov hniav tuab ntawm cov nyhuv sib xyaw yog qhov tseem ceeb rau kev ua kom zoo ntawm cov khoom sib tov.
2. Influence Mechanism of Blade Thickness on Mixing Effects
2.1 Nyias Hniav (＜12mm)
Thaum cov hniav tuab tsawg dua qhov tsim nyog, tag nrho cov rigidity yog tsis txaus, thiab nws yog feem ntau elastic deformation los yog txawm yas dabtsi yog khoov nyob rau hauv kev cuam tshuam thiab kev sib txhuam ntawm cov ntaub ntawv (tshwj xeeb tshaj yog nyuaj aggregates xws li pob zeb). Nws qhov kev cuam tshuam tsis zoo rau kev sib xyaw ua ke feem ntau yog tshwm sim hauv cov hauv qab no:
Kev sib xyaw ua ke tsis zoo thiab kev sib cais hnyav: Cov hniav deformed tsis tuaj yeem nqa thiab pov cov ntaub ntawv zoo, ua tsis tau zoo txaus rau kev ncig. Qhov sib txawv ntawm cov hniav thiab cov liner nce, ua rau tsis muaj peev xwm ua kom muaj zog shearing zoo. Cov khoom sib xyaw xws li cov cement thiab cov khoom sib xyaw tsis tuaj yeem tawg tag nrho, ua rau kev sib cais ntawm cov khoom sib xyaw thiab muab tshuaj txhuam, cov cement agglomeration, thiab cov kev faib ua feem hauv cheeb tsam. Qhov sib xyaw ua ke (CV tus nqi) feem ntau siab dua 15%, uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua.
Lub sijhawm sib xyaw ua ke ntev thiab txo kev ua haujlwm: Txhawm rau them nyiaj rau qhov teeb meem ntawm kev sib xyaw tsis sib xws, lub sijhawm sib xyaw yuav tsum tau ua kom ntev li ntawm 50%. Thawj 30-thib ob lub voj voog sib xyaw yog txuas ntxiv mus rau ntau tshaj 1 feeb, cuam tshuam cov khoom sib dhos ntawm qhov chaw sib tov, ua rau rov qab rau hauv cov khoom sib txuas tom qab thiab tshem tawm, thiab txo qhov kev ua haujlwm tag nrho los ntawm 30% -50%.
Cov khoom pov tseg tsis ruaj khov thiab cov khoom seem loj: Cov hniav nyias nyias muaj zog muab kauv thawb, ua rau nws tsis tuaj yeem thawb cov ntaub ntawv ntawm lub tog raj kheej phab ntsa thiab hauv qab mus rau qhov chaw nres nkoj tawm. Tom qab txhua qhov sib tov, 5% -15% ntawm cov ntaub ntawv tseem nyob, uas ua kom tawv thiab sib xyaw nrog cov ntaub ntawv tshiab, ntxiv rau kev sib xyaw tsis sib xws thiab tsim "txheej txheej sib tsoo" uas ua rau kom hnav cov hniav thiab liner.
Cov khoom siv vibration hnyav thiab siv zog ntau ntxiv: Cov hniav deformed ua rau cov khoom tsis ruaj khov nqa, hloov pauv sib xyaw ua haujlwm, thiab muaj kev cuam tshuam loj thaum ua haujlwm. Qhov no ua rau muaj kev vibration loj heev ntawm cov cuab yeej, ua kom qaug zog hnav ntawm cov ncej sib xyaw, ua kom cov kabmob clearance, thiab muaj hnub nyoog ntawm cov iav reducer. Nyob rau tib lub sijhawm, qhov hloov pauv hloov pauv ua rau 10% -20% nce hauv kev siv zog.
2.2 Nruab Nrab Hniav Thickness (12-20 mm)
Thaum cov hniav tuab nyob rau hauv qhov tsim nyog (12-20 hli rau me me thiab nruab nrab- sib tov sib xyaw, 20-24 hli rau cov khoom sib xyaw loj), nws muaj qhov txaus rigidity thiab hnav tsis kam, nrog cov khoom ruaj khov stirring thiab pom kev sib xyaw ua haujlwm. Nws qhov zoo yog raws li nram no:
Kev sib xyaw ua ke zoo heev thiab tsis muaj kev sib cais: Cov hniav tsis muaj deformation thaum lub sijhawm ua haujlwm, tuav qhov sib txawv tsim nyog (3-5 hli) nrog rau liner. Nws tuaj yeem nqa thiab pov cov ntaub ntawv tau zoo, ua kom muaj zog sib npaug thiab ua haujlwm shearing. Cov ntaub ntawv sib xyaw ua ke hauv txhua qhov kev qhia (axial, radial, thiab circumferential), nrog rau kev sib xyaw ua ke (CV tus nqi) ntawm 8% -12%, tsis muaj kev sib sau ua ke lossis cov cement agglomeration, thiab cov khoom ruaj khov.
Lub sijhawm sib tov luv thiab ua haujlwm siab: Qhov nruab nrab- tuab tuab muaj cov khoom muaj zog nplawm, ua kom tiav kev sib xyaw ua ke hauv lub sijhawm tsim (30-60 vib nas this). Lub zog ntau lawm yog qhov ruaj khov, thiab kev ua haujlwm tau zoo tshaj plaws thaum ua kom muaj kev sib xyaw zoo.
Kev tso tawm ruaj khov thiab qis qis: Cov hniav muaj lub zog thawb txaus, muaj txiaj ntsig zoo ntawm cov khoom siv ntawm lub tog raj kheej phab ntsa thiab hauv qab, nrog rau cov khoom seem ntawm tsawg dua 3%, zam qhov teeb meem ntawm hardened residue cuam tshuam rau kev sib tov zoo.
Cov khoom siv ruaj khov ua haujlwm thiab kev siv hluav taws xob tsawg: Lub load ruaj khov thaum lub sijhawm ua haujlwm, nrog lub zog sib xws, tsis muaj kev vibration hnyav, thiab kev pabcuam lub neej ntawm cov khoom sib kis xws li cov ncej, bearings, thiab reducer. Kev siv hluav taws xob yog nyob rau hauv qhov ntsuas qhov ntsuas, nrog tus nqi siab -kev ua tau zoo.
2.3 Thick Hniav (＞ 24 mm)
Kev ua kom cov hniav tuab heev (ntau dua 24 hli) yuav ua rau qhov hnyav dua thiab ua kom tsis muaj zog, uas yuav cuam tshuam rau kev sib xyaw thiab kev ua haujlwm ntawm cov khoom siv:
Nce stirring kuj thiab lub zos tuag ces kaum: Cov hniav tuab heev muaj qhov sib tiv tauj loj nrog cov ntaub ntawv, ua rau muaj kev sib zog ua kom tsis muaj zog thiab siv hluav taws xob ntau (nce ntau dua 20%). Nyob rau tib lub sijhawm, cov hniav tuab yog qhov yooj yim rau cov khoom jamming thiab tsub zuj zuj ntawm cov hauv paus hniav, tsim cov hauv zos sib xyaw cov fab tuag, ua rau cov khoom sib xyaw tsis sib xws hauv qee qhov chaw.
Txo cov khoom pov tseg qhov siab thiab tsis muaj zog convection: Cov hniav hnyav dhau lawm muaj cov lus teb qeeb qeeb, txo cov khoom nqa thiab ntuav qhov siab, ua rau lub cev tsis muaj zog, thiab ua kom lub sijhawm sib xyaw kom ntev mus rau qee yam.
Cov khoom siv ntxiv load thiab ceev hnav: Tus kheej- qhov hnyav ntawm cov hniav thiab qhov sib zog ua haujlwm yog qhov loj heev, ua rau ntev - lub sij hawm siab - thauj khoom ntawm kev sib xyaw ncej, bearings, thiab reducer, ua rau qaug zog hnav thiab ua kom lub neej ntev ntawm cov khoom sib kis. Tsis tas li ntawd, cov ntaub ntawv hardened khaws cia rau ntawm phab ntsa sab hauv ntawm lub tog raj kheej aggravate lub abrasion ntawm lub tog raj kheej qauv.
Tus nqi tsis zoo -kev ua tau zoo: Cov hniav tuab tuab heev muaj qhov hnyav hnyav hnyav heev, thiab cov hniav lub cev tsis tshua hnav, tab sis qhov hnyav rov ua dua yog ntau dhau, nce kev tsim khoom thiab tu cov nqi, thiab txo cov txiaj ntsig kev lag luam.
3. Optimal Blade Thickness Range thiab Engineering xaiv
3.1 Optimal Thickness Range
Ua ke nrog theoretical tsom xam thiab kev xyaum ua engineering, qhov zoo tshaj plaws hniav thickness ntawm ntxaib -shaft mixers yog raws li nram no:
Me me tov khoom (＜2 m³)12-16 hli (khoom siv: 65Mn steel, nto hardening).
Qhov nruab nrab tov khoom (2-5 m³)16-20 mm (khoom siv: 65Mn steel, surfacing tungsten carbide, hardness HRC58-62).
Loj tov khoom (＞ 5 m³): 20-24 mm (khoom siv: siab-lub zog manganese steel, integral casting + hnav- tiv thaiv txheej).
3.2 Txoj Cai Kev Xaiv Engineering
Hauv kev xaiv engineering tiag tiag, cov hauv qab no yuav tsum tau txiav txim siab zoo:
Cov yam ntxwv ntawm cov khoom: Rau cov ntaub ntawv uas muaj siab hardness thiab loj abrasiveness (xws li pob zeb ua pob zeb loj), xaiv ib lub thickness ze rau lub sab sauv txwv; rau cov ntaub ntawv uas tsis tshua muaj hardness thiab me me abrasiveness (xws li mortar qhuav), xaiv ib lub thickness ze rau qhov qis dua.
Mixer qauv: Sib phim lub thickness raws li qhov sib tov ntim, thiab tsis txhob "me me nrog cov hniav tuab" lossis "loj tov nrog cov hniav nyias".
Ntau lawm efficiency: Nyob rau hauv lub hauv paus ntawm kev ua kom muaj kev sib xyaw zoo, xaiv cov tuab tuab kom sib npaug ntawm kev ua haujlwm thiab kev siv hluav taws xob.
Tus nqi tu: Xaiv ib lub thickness nrog txaus hnav tsis kam los txo qhov zaus ntawm cov hniav hloov thiab kho cov nqi.