Kev sib tsoo workpieces yog ib qho haujlwm ua haujlwm ntau, ua thaum nruj nruj heev thiab ua tiav qhov yuav tsum tau ua. Cov neeg ua haujlwm ntawm lub ntsej muag ntsug lub ntsej muag yuav tsum paub txog cov cuab yeej siv lub tshuab nws tus kheej, nrog rau yuav ua li cas xaiv thiab siv cov log sib tsoo, cov khoom sib dhos ua haujlwm, thiab txias kom thiaj li ua tiav kev ua haujlwm sib tsoo. Kab lus no feem ntau yuav qhia yuav ua li cas los xam lub log sib tsoo nrawm ntawm ntsug kawg sib tsoo.
Ntsug ntsej muag lub ntsej muag tshuab cov cuab yeej feem ntau yog tsim los rau txheej txheem kev sib tsoo thiab xav tau tsim nyog tsim cov khoom sib tsoo. Ntawm qhov tod tes, thaum lub log sib tsoo qis tau siv rau kev sib tsoo saum npoo ntawm ntau hom kev sib xyaw ua haujlwm siab thiab lub zog ua haujlwm siab, qis qis sib tsoo nrawm heev, kwv yees li 3,000 txog 4,000 fpm, yog xav tau los ua kom txo qis cua sov. Ntxiv rau,, Muaj qee yam khoom siv thiab cov khoom ua haujlwm uas tshwj xeeb tshaj yog tiv taus cua sov.
Kev nrawm ntawm lub log sib tsoo nyob ntawm seb hom kev sib tsoo ua haujlwm, xws li sab nrauv lossis sab hauv sib tsoo lossis txiav haujlwm. Kev ua haujlwm nrawm yog nyob ntawm hom haujlwm, hom kev sib tsoo thiab qhov xav tau ua tiav. Rau kev ua haujlwm siab dua, nws raug nquahu kom siv cov log sib tsoo nyuaj dua thiab rov ua dua.
Xam qhov ceev ntawm kev sib tsoo lub log ntawm qhov ntsug kawg li
Txhawm rau suav qhov nrawm nrawm ntawm kev sib tsoo lub log ntawm lub ntsej muag kawg lub ntsej muag sib tsoo, nws yog qhov tsim nyog los txiav txim siab tias lub log ib puag ncig hla los ntawm qhov ncig ntawm lub log ntawm cov khoom tawg yog ib zaug ib lub log ntawm kev hloov pauv. Yog li lawv qhov nrawm yog sib npaug ntawm ib puag ncig (hauv ko taw) sib tw los ntawm kev tawm tsam ib feeb (RPM).
Ib qho ntxiv, koj puas paub tias RPM sawv cev rau qhov nrawm ntawm kev sib tsoo lub log ntawm lub ntsej muag kawg ntsej muag li cas? RPM=revolutions ib feeb; txhais raws li qhov ua tiav qhov nrawm ib feeb. SFPM=taw taw ib feeb; txhais raws li qhov deb ntawm txhua yam ntawm cov khoom txhuam txav mus rau ntawm qhov txiav ib feeb twg. Lub log nrawm feem ntau muab rau hauv SFPM, thaum lub tshuab nrawm feem ntau qhia hauv RPM.
Tsis tas li ntawd, lub cav sib tsoo nrawm npaum li cas? Kev ceev ntawm lub log sib tsoo yuav tsum tau khaws cia hauv thaj tsam ntawm 5000 txog 6500 taw ib feeb (1525 txog 1980 meters ib millimeter), tshwj tsis yog muaj cov xwm txheej tshwj xeeb lossis siv cov cuab yeej thiab cov log sib tsoo tsim los kom ua kom nrawm dua ntawm kev sib tsoo log.
Yuav ua li cas laij tawm qhov nrawm ntawm RPM? Muab lub kaum sab xis ntawm cov khoom ua tiav los ntawm qhov nrawm nrawm los ntsuas qhov nrawm nrawm. Piv txwv li, yog tias nws tig ntawm 400 rpm: 87.98 × 400=35,192. Qhov no yog qhov nrawm ntawm qhov khoom, ntsuas hauv nti ib feeb. Faib cov lus teb no los ntawm 63,360, uas yog tus lej ntawm ib mais: 35,192 ÷ 63,360=0.555.
Dab tsi yog qhov siab tshaj plaws ntawm kev sib tsoo lub log ntawm txoj kab ntsug ntsug
Ib qhov muaj peev xwm ua rau raug mob loj hauv txheej txheem sib tsoo ntawm ntsug ntsug sib tsoo yog ib qho yooj yim ua rau tsis saib xyuas: ua haujlwm lub log sib tsoo nyob hauv qhov xwm txheej nrawm. Txawm hais tias lub log uas khiav deb txaus dhau nws qhov ntsuas siab tshaj plaws yuav tawg nyob rau ob peb feeb tom qab kev ua haujlwm, lub log uas khiav tsuas yog me ntsis nrawm dua nws qhov ntsuas nrawm kuj tseem yuav ua rau muaj kev phom sij. Qhov xwm txheej hnyav tshaj qhov hnyav no yuav ua rau lub log puas, uas yuav ua rau muaj kev puas tsuaj tom qab siv ntxiv. Piv txwv li, ua haujlwm txhim kho 9-inch txoj kab 27-hom sib tsoo lub log nrog qhov siab tshaj ntawm 6,600 rpm ntawm 7-nti sib tsoo nrog nrawm ntawm 7,700 rpm tuaj yeem ua rau lub log sib tsoo tawg. Hom kev tawg no tuaj yeem ua rau tawg nyob rau yav tom ntej.
Qhov txaus ntshai ntawm kev khiav nrawm dhau los ntawm lub zog centrifugal. Raws li qhov tshwm sim ntawm kev txav mus los, lub zog centrifugal yog qhov ua rau qhov hnyav ntawm qhov kawg ntawm txoj hlua kom rub txoj hlua qhia thaum qhov hnyav yws hauv ib lub voj voog. Thaum lub log sib tsoo tig, tib lub zog ua rau lub log sib tsoo rub tawm sab nraud los ntawm qhov nruab nrab ntawm kev sib hloov.
Hauv ntej, tsis txhob nrawm dua lub log sib tsoo. Nws yog qhov tsim nyog los sib piv qhov nrawm ntawm lub ntsej muag kawg lub ntsej muag sib tsoo nrog qhov nrawm cim ntawm lub log sib tsoo lossis ntim khoom kom ntseeg tau tias lub tshuab nrawm yog sib npaug lossis qis dua qhov ua haujlwm siab tshaj plaws ntawm kev sib tsoo log. Qhov kev pheej hmoo ntawm qib no tsis yog tsuas yog lub log puas, tab sis tseem muaj kev nyab xeeb ntawm cov neeg ua haujlwm rhiav.
Yuav ua li cas xam qhov nrawm ntawm kev sib tsoo lub log ntawm lub ntsej muag kawg lub ntsej muag sib tsoo? Dab tsi yog qhov siab tshaj plaws ntawm kev sib tsoo lub log ntawm lub ntsej muag kawg lub ntsej muag sib tsoo? Nyeem kab lus, peb tuaj yeem paub meej cov lus teb. Txhawm rau suav qhov nrawm ntawm kev sib tsoo lub log ntawm lub ntsej muag kawg lub ntsej muag sib tsoo, nws yog qhov tsim nyog los txiav txim siab tias lub log ib puag ncig hla los ntawm lub log ib puag ncig ntawm cov khoom tawg uas siv los ua ib lub log rau kev hloov pauv. Yog li lawv qhov nrawm yog sib npaug ntawm ib puag ncig (hauv ko taw) sib tw los ntawm kev tawm tsam ib feeb (RPM).
