Polyspast yog ib qho txheej txheem los ntawm kev nqa khoom. Nws muaj ib los yog ntau pawg ntawm cov blocks qhwv ib ncig ntawm ib txoj hlua. Lo lus "polyspast" los ntawm Greek polyspastion. Lo lus no txhais tau tias "stretched by ob peb ropes." Lub luag haujlwm tseem ceeb ntawm cov saw hoist yog txhawm rau txhawm rau nqa lub peev xwm ntawm lub ntsiab mechanism.
Hauv lwm lo lus, cov cuab yeej no ua rau muaj zog ntxiv. Txawm li cas los xij, qhov cuam tshuam rov qab los ntawm kev siv cov saw hoist yog txo tus nqi nce. Koj tseem tuaj yeem nce nrawm ntawm kev siv zog. Txawm li cas los xij, xws li pulley blocks yog siv ntau tsawg zaus. Txawm li cas los xij, lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub cuab yeej yog qhov kev txiav txim ntawm lub lever.
Mechanism device
Polyspast yog lub tshuab nqa nqa uas tso cai rau koj kom tau txais lub zog uas tshaj qhov nqa lub zog ntawm lub winch ob peb zaug. Nyob rau hauv lwm yam lus, qhov no mechanism ua rau kom lub load peev xwm ntawm lub ntaus ntawv. Kev siv cov saw hoist tso cai rau koj nqa lub nra hnyav nrog lub winch uas muaj peev xwm nqa me me. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias kev nqa ceev ntawm cov qauv hnyav yuav txo qis npaum li qhov nce hauvmuaj peev xwm.
Lub Hom Phiaj ntawm mechanism
Polyspast yog xav tau los nqa cov khoom hnyav nrog tsawg kawg ntawm kev siv zog. Txoj kev yooj yim tshaj plaws ntawm cov saw hoist yog tsim los kom ib qho kawg ntawm txoj hlua yog tsau rau ntawm lub nruas, thiab ib qho kev ncua sij hawm yog nyob rau ntawm qhov kawg ntawm txoj hlua. Cov cuab yeej siv nrog cov qauv tsim ntau dua suav nrog ntau qhov ruaj khov thiab txav tau yooj yim.
Rau txhua qhov hnyav, qhov ntev, thaiv thiab txoj kab uas hla ntawm txoj hlua yuav tsum raug coj mus rau hauv tus account. Ib qho kev thauj khoom uas muaj qhov loj, thaum raug tshem tawm ntawm txoj hlua, ua kom lub nra hnyav. Xws li ib tug mechanism yog characterized los ntawm ceev ceev. Hauv qhov no, yuav tsum tau txo qhov nro ntawm txoj hlua. Yog li ntawd, ob lossis plaub txoj hlua yog siv los tshem tawm qhov loj. Nws tseem tuaj yeem siv cov saw hoist nyuaj.
Txoj Cai Ua Haujlwm
Rau tus neeg uas tsis muaj dab tsi ua nrog kev thauj khoom, lub npe ntawm cov txheej txheem no yuav zoo li tsis nkag siab. Txawm li cas los xij, hauv kev muaj tiag, saw hoist yog ib qho yooj yim nqa mechanism uas yuav luag txhua tus tuaj yeem tsim. Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm cov cuab yeej no yog qhov yooj yim heev thiab nws tau kawm hauv tsev kawm ntawv hauv cov lus qhia physics. Thiab lub tswv yim ntawm kev ua haujlwm ntawm me me "crane" yog qhov yooj yim heev.
Cov saw hoist tsim muaj ntau pawg ntawm cov blocks sib sau ua ke hauv cov tuav tshwj xeeb. Thiab lawv hloov khoov ib ncig nrog hlua los yog hlua. Txawm tias qhov kev tsim qauv yooj yim no tuaj yeem siv tau zoo heev los ua kom lub zog siv rau qis lossis nce loads. Tsis tas li ntawd, tus tsim ntawm ib qho yooj yim saw hoist muaj cargo blocks. Lawv tuaj yeem yog cov hauv qab no:
- ntau tus menyuam lossis ib tus menyuam;
- taag lossis txav tau.
Lub zog traction ntawm txoj hlua hauv qhov no yog nyob ntawm tus naj npawb ntawm cov hlua ntawm txoj hlua siv.
Cov cuab yeej siv hauv thaj chaw twg?
Pulley thaiv yog siv los nqa thiab txav cov khoom thauj hauv cov xwm txheej uas tsuas yog lub cev lub zog ntawm tus neeg thiab tsawg kawg ntawm cov cuab yeej pabcuam siv tau. Tsis tas li, cov saw hoist yog qhov tseem ceeb tshaj plaws ntawm winches, cranes thiab lwm yam khoom siv tshuab.
Vim li no, cov cuab yeej no tau siv nyob rau hauv yuav luag txhua qhov chaw uas nqa thiab thauj cov txheej txheem siv: los ntawm kev ua haujlwm hauv tsev mus rau kev lag luam hnyav.
Yog li, ntawm lub hauv paus ntsiab lus twg lub saw hoist ua haujlwm? Kev ua haujlwm ntawm cov cuab yeej no yog ua raws li txoj cai ntawm lub zog: nrog kev nce hauv lub zog, koj tau txais kev poob hauv kev deb. Txij li thaum lub hauv paus ntsiab lus no yooj yim heev, nws yuav tsis yooj yim los ua ib lub saw hoist nrog koj tus kheej tes. Txhawm rau ua qhov no, koj tsuas yog yuav tsum tsuas yog ob lub log ib leeg xwb.
txhawm rau nqa lub nra ntawm qee qhov loj nrog kev pab ntawm lub saw hoist, koj yuav tsum ua kom muaj zog, ib nrab kom ntau li ntau tau. Tsis txhob hnov qab txog qhov ntev ntawm txoj hlua siv. Nws yuav tsum yog ob zaug ntawm qhov siab uas lub load yuav raug nqa. Nws yuav tsum raug sau tseg tias saw hoists nrog cov cuab yeej yooj yim tshaj plaws yog hu ua "ob-rau-ib saw hoists", raws li lawv ua rau kom muaj zog thov.ob zaug. Peb lub blocks tsim, raws li, muab qhov nce peb zaug hauv lub zog.
Polyspast ntau ntau
Nws yuav tsum tau muab sau tseg tias kev suav ntawm cov saw hoist plays lub luag haujlwm tseem ceeb heev. Tom qab tag nrho, lub mechanism ua hauj lwm deb ntawm zoo tagnrho tej yam kev mob. Nws raug cuam tshuam los ntawm kev sib txhuam quab yuam uas tshwm sim thaum lub cable txav raws lub pulley. Tsis tas li ntawd, kev sib txhuam quab yuam tshwm sim thaum cov menyuam tig, tsis hais cov bearings siv nyob rau hauv nws.
Txhawm rau txiav txim siab qhov nro ntawm txoj hlua siv yam tsis suav nrog kev sib txhuam kev poob, nws yog qhov yuav tsum tau faib qhov hnyav ntawm cov khoom thauj los ntawm ntau qhov sib txawv ntawm cov saw hoist. Nws yuav tsum to taub raws li tus naj npawb ntawm cov hlua threads tuav lub load. Tsis tas li ntawd, kev sib txhuam yuav tsum tsis txhob muab pov tseg. Kev ua haujlwm ntawm cov saw hoist kuj nyob ntawm nws.
Nws tuaj yeem txo tau los ntawm kev siv cov khoom zoo thiab cov hlua, nrog rau kev ua haujlwm zoo uas tshem tawm qhov tsis tsim nyog sib tshooj thiab kinks.
Hnub no, cov phiaj xwm saw hoist tau kawm txawm tias hauv chav kawm physics hauv tsev kawm. Nrog lawv cov kev pab, ua qhov kev tsim no yuav tsis yooj yim. Koj kuj yuav tsum tau yuav cov khoom hauv qab no:
- fitting;
- hlua;
- winch.
Cov qauv khoom siv twg muaj?
Txhawm rau tsim cov qauv yooj yim, tsuas yog ib qho thaiv xwb. Kev siv cov txheej txheem zoo li no ua rau muaj kev nce ntxiv hauv ob lub zog. Qhov no txhais tau hais tias txhawm rau nqa lub nra koj yuav tsum tau ua ib nrab ntawm kev siv zog. Txawm li cas los xij, txoj hlua hauv qhov no yuav tsum yog ob zaug ntev. Xws li cov saw hoist muaj qhov sib piv ntawm ob mus rau ib qho. Xws li tus tsim yuav tsis muaj cov blocks kiag li.saw hoist, raws li koj tuaj yeem siv carabiner tsis tu ncua.
Thaum siv ob lub blocks ib zaug hauv cov saw hoist, koj tuaj yeem ua kom zoo dua peb zaug hauv kev siv dag zog. Kuj tseem muaj kev nyab xeeb uas ua haujlwm thaum txoj hlua khi qis. Nyob rau hauv rooj plaub no, ob txoj hlua khi tau nruj thiab thaiv lub nra.
Yog tias koj ntxiv ob lub thaiv ntxiv rau cov txheej txheem yav dhau los, koj tau txais lub tshuab rub tawm uas ua rau muaj plaub npaug ntawm lub zog. Xws li ib tug mechanism muaj kev sib raug zoo ntawm plaub mus rau ib tug. Nyob rau hauv cov txheej txheem no, ib feem peb ntawm qhov hnyav mus rau qhov kawg ntawm txoj hlua, thiab cov seem ntawm cov load mus rau txoj hlua nws tus kheej.
Txoj saw hoists
Nco ntsoov tias kev sib kis tsis tuaj yeem ua tiav vim kev sib txhuam. Thaum txoj hlua rub tawm ntawm qhov thaiv, kaum mus rau nees nkaum feem pua ntawm cov ntaub ntawv thov raug poob. Yog li ntawd, nyob rau hauv ib tug yooj yim saw hoist, qhov tseeb, tus piv yuav yog kwv yees li 1.8 kilograms ib kilogram ntawm lub load yog nqa. 5-fold saw hoist yuav ua kom muaj zog me ntsis ntau dua 3 zaug.
Qhov piv txwv saum toj no qhia tau hais tias nws muaj peev xwm ua kom cov rubey blocks mus rau qee qhov kev txwv, tom qab ntawd qhov kev cuam tshuam yuav tshwm sim. Txawm li cas los xij, txhawm rau txhawm rau nce qhov siab tshaj plaws, cov saw hoists nyuaj tuaj yeem siv.
Txoj saw hoist no yog tsim los ntawm txoj hauv kev uas lub lifted hnyav tsis tsim ib lub nra ntawm lub thaiv kawg. Hloov chaw, nws thauj cov hlua uas hla lub thaiv. Yog li ntawd, ntawmsiv 3 blocks, saw hoists 2: 1 thiab 3: 1 yog sib txuas. Hauv txoj kev xav, qhov no ua rau muaj kev nce rau hauv lub zog, tab sis hauv kev xyaum - 4.3 npaug.
Yuav txo kev sib txhuam li cas?
Qhov teeb meem tseem ceeb ntawm cov saw hoist yog nyob rau hauv cov txheej txheem ntawm kev ua hauj lwm nws yuav tsum tau kov yeej cov kev sib txhuam tawm tsam. Qhov teeb meem no tuaj yeem daws tau qee qhov yog tias cov hlua zoo, cov hlua rub nrog cov kwj deg, nrog rau cov roj tuab yog siv.
Tsis tas li, muaj cov hauv kev ntxiv nrog rau kev siv cov saw hoist tsim. Piv txwv li, yog tias koj tsis siv ib qho carbine, tab sis ob. Vim li no, kev sib txhuam quab yuam txo, thiab lub vojvoog ntawm qhov khoov kuj nce.
