Raws li ib qho tseem ceeb conveying khoom, kauv yeeb nkab muaj ntau yam ntxwv. Cov kav dej kauv tau siv dav vim tias lawv tuaj yeem thauj cov hmoov, granular, flake thiab lwm yam khoom siv los ntawm ib qho mus rau lwm qhov. Cia peb saib cov yam ntxwv tseem ceeb ntawm cov khoom siv kauv raj.
Cov qauv ntawm cov khoom siv kauv raj yog qhov yooj yim, tsuas yog ob peb ntu, thiab kev teeb tsa kuj yooj yim. Nyob rau hauv cov nqe lus ntawm kev khiav hauj lwm thiab txij nkawm, nws kuj yog heev yooj yim. Vim tias cov khoom siv kauv raj tuaj yeem thauj tau ntau hom khoom siv, nws muaj ntau yam kev siv. Tsis tsuas yog nws tuaj yeem siv rau hauv cov khoom noj, paj rwb, tshuaj lom neeg kev lag luam thiab lwm yam lag luam, tab sis kuj tseem siv rau hauv cement, pob zeb, roj thiab lwm yam kev lag luam. Kev ua haujlwm ntawm cov kav raj yog qhov ruaj khov, thiab cov teeb meem xws li "tawg choj" tsis yooj yim tshwm sim thaum lub sijhawm ua haujlwm, thiab kev ruaj ntseg yog siab heev. Nyob rau tib lub sijhawm, nws lub neej kev pabcuam yog qhov ntev, thiab nws tuaj yeem tswj tau lub sijhawm ua haujlwm ruaj khov rau lub sijhawm ntev. Piv nrog rau cov khoom siv ib txwm siv, cov kav raj xaim siv lub zog tsawg dua, yog li nws muaj kev nyab xeeb dua thiab tuaj yeem txo cov khoom siv hluav taws xob zoo.
Cov kauv raj tuaj yeem hloov cov kev taw qhia thiab lub kaum sab xis raws li qhov xav tau, yog li kev txav mus los kuj zoo heev thiab hloov tau yooj yim. Raws li cov ntsiab lus, cov khoom siv kauv yeeb nkab muaj ntau yam zoo xws li cov qauv yooj yim, kev teeb tsa yooj yim, kev siv dav, kev ntseeg siab, lub neej ntev, kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig, thiab kev txav mus los zoo. Nrog rau txoj kev loj hlob ntawm lub zej zog, nws yog ntau thiab ntau lug siv nyob rau hauv txawv teb chaws thiab plays lub luag hauj lwm tseem ceeb. Cov khoom siv kauv yeeb nkab yog dav siv hauv petrochemical, kais dej, roj av thiab lwm yam lag luam, thiab feem ntau yog siv los thauj cov xov xwm siab viscosity. Cov khoom siv kauv raj tsis tsuas yog muaj cov qauv yooj yim thiab txhim khu kev qha, tab sis kuj muaj ntau yam zoo. Cov hauv qab no yog kev qhia txog qhov zoo ntawm cov khoom siv kauv raj:
Kev siv lub zog ntawm cov khoom siv kauv yeeb nkab yog qhov tsawg heev, thiab nws tsis xav tau lub zog hluav taws xob sab nraud piv nrog cov khoom siv coj los siv. Kev tsim sab hauv ntawm lub raj helical tsim ib txoj hauv kev ntawm kev txav mus los rau tus kheej kom txaus. Qhov kev tsim no tuaj yeem tsis tsuas yog txo qis kev siv hluav taws xob, tab sis kuj ua rau lub neej ntawm cov cuab yeej siv, yog li nws yog kev lag luam ntau dua thiab siv tau.
Cov khoom siv kauv raj yog tsim rau kev xa cov kua dej siab lossis cov khoom semi-solid. Kev siv cov khoom siv kauv raj yuav tsis rhuav tshem cov qauv molecular ntawm cov kua thiab yuav tsis tsim shear quab yuam, yog li ua kom ruaj khov ntawm cov kua thauj. Cov khoom siv kauv raj muaj cov qauv yooj yim thiab siv qhov chaw me me. Piv nrog rau lwm cov khoom siv conveying, nws lub ntsiab kom zoo dua yog tias nws nyob hauv ib cheeb tsam me me, thiab cov kav xa dej tuaj yeem hloov kho thiab hloov raws li qhov tseeb ntawm qhov chaw. Kev ntxuav ntawm cov khoom siv kauv raj yog ib qho yooj yim heev, thiab tuaj yeem daws tau nrog kev tu dej siab los yog cov kuab tshuaj xaiv. Qhov no ua rau muaj kev tu zoo. Tsis tas li ntawd, rau cov khoom me me xws li cov av qis, nws tsuas yog yuav tsum qhib ob peb lub chaw hloov pauv rau kev saib xyuas, uas pab txhawb kev siv cov neeg siv khoom.
Cov khoom siv kauv yeeb nkab tsis tsuas yog txo qis kev siv hluav taws xob, tab sis kuj txuag tau ntau tus nqi. Vim tias nws tsis xav tau kev txhawb zog ntxiv, nws tuaj yeem txo cov nqi kho thiab kev ua haujlwm ntawm cov tuam txhab rau qee yam. Nyob rau tib lub sijhawm, vim nws lub neej ntev, nws tsis yooj yim rau kev tawg thiab kho, thiab nws tuaj yeem txo cov nqi tu cov cuab yeej thiab lub sijhawm rau kev tu ncua sijhawm. Cov khoom siv kauv yeeb nkab tuaj yeem hloov mus rau ntau yam kev siv nrog cov kev cai tshwj xeeb ib puag ncig, thiab muaj kev vibration siab thiab kev poob siab, thiab ruaj khov rau kev ua haujlwm ntawm cov khoom loj. Nyob rau hauv luv luv, kauv yeeb nkab cov cuab yeej muaj ntau yam zoo, uas tuaj yeem txhim kho kev ua haujlwm ntawm cov tuam txhab thiab txo cov nqi tsim khoom.
