Nws siv ntau txhiab xyoo rau cov ntsia hlau me me los tsim kom txog thaum lawv tau nruj clockwise thiab loosened counterclockwise. Puas muaj cov hmoov kub xav txog ib qho teeb meem, vim li cas lawv thiaj li yuav tsum tau ua nruj nreem clockwise?
Rau qhov yooj yim mechanical cuab yeej yog:Screws, Inclined Surfaces, Levers, Pulleys, Wedges, Log, Axles.
Cov ntsia hlau yog ntawm rau lub tshuab yooj yim, tab sis muab nws bluntly, nws tsuas yog ib qho axis thiab lub dav hlau inclined winding nyob ib ncig ntawm nws. Niaj hnub no, screws tau tsim cov qauv loj. Txoj kev siv ib tug ntsia hlau yog kom nruj nws clockwise (raws li opposed to counterclockwise kom loosen).
Txawm li cas los xij, txij li cov ntsia hlau thaum pib ntawm kev tsim khoom yog txhua tus ua los ntawm tes, qhov zoo ntawm cov ntsia hlau tsis zoo ib yam, uas feem ntau txiav txim siab los ntawm tus kheej nyiam ntawm tus kws ua haujlwm.
Nyob rau hauv nruab nrab-16th caug xyoo, Fabkis lub tsev hais plaub engineer Jaques Besson tau tsim lub tshuab dhos uas tuaj yeem txiav rau hauv cov ntsia hlau, thiab cov cuab yeej no tau nrov hauv 100 xyoo. Tus txiv neej Askiv Henry Maudsley tau tsim lub tshuab dhos niaj hnub hauv xyoo 1797, thiab nrog rau nws, qhov zoo ntawm cov xov tau zoo dua qub. Txawm li cas los xij, tsis muaj tus qauv zoo sib xws rau qhov loj thiab qhov zoo ntawm cov ntsia hlau.
Qhov xwm txheej no tau hloov pauv xyoo 1841. Yauxej Whitworth, tus kws tshaj lij ntawm Maudsley, tau xa ib tsab xov xwm mus rau Lub Tsev Haujlwm Saib Xyuas Kev Ua Haujlwm Hauv Nroog hu rau kev sib koom ua ke ntawm cov qauv ntsia hlau. Nws tau ua ob lub tswv yim:
1. Lub inclination ntawm cov ntsia hlau xov yuav tsum yog 55 °.
2. Txawm hais tias txoj kab uas hla ntawm cov ntsia hlau, yuav tsum tau txais ib qho qauv rau cov xov tooj ntawm ib ko taw.
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Post lub sij hawm: Apr-16-2020