nws yog dab tsi thiab nws ua haujlwm li cas
Lub viscous coupling, los yog viscous coupling, yog ib qho ntawm cov tsheb kis tau tus mob uas yog siv los xa thiab sib npaug torque. Lub viscous coupling kuj yog siv los hloov kev sib hloov mus rau lub radiator txias kiv cua. Tsis yog txhua tus tswv tsheb tau paub zoo hauv cov cuab yeej thiab lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm qhov sib txuas ua ke, yog li peb tau txiav txim siab los muab ib qho ntawm peb cov vodi.su portal rau lub ntsiab lus no.
Ua ntej ntawm tag nrho cov, ib tug yuav tsum tsis txhob confuse lub hauv paus ntsiab lus ntawm kev khiav hauj lwm ntawm ib tug viscous coupling nrog ib tug hydraulic coupling los yog torque converter, nyob rau hauv uas lub hloov ntawm torque tshwm sim vim lub dynamic zog ntawm cov roj. Nyob rau hauv cov ntaub ntawv ntawm viscous coupling, ib tug txawv kiag li txoj cai yog siv - viscosity. Qhov khoom yog tias cov kua dej dilatant raws li silicon oxide, uas yog, silicone, yog nchuav rau hauv cov kab noj hniav sib txuas.
Cov kua dilatant yog dab tsi? Nws yog cov kua dej uas tsis yog-Newtonian uas nws cov viscosity nyob ntawm qhov nrawm nrawm thiab nce ntxiv nrog kev nce shear strain tus nqi.. Qhov no yog li cas cov yam ntxwv tseem ceeb ntawm cov kua dej dilatant tau piav qhia nyob rau hauv encyclopedias thiab technical literature.
Yog hais tias peb txhais tag nrho cov formulations no rau hauv ib hom lus ntau to taub rau feem coob ntawm cov pejxeem, peb yuav pom tias ib tug dilatant uas tsis yog-Newtonian kua nyhav nyhav rau solidify (nce viscosity) nrog ceev stirring. Cov kua no hardens ntawm qhov ceev uas lub crankshaft ntawm lub tsheb tig, uas yog, yam tsawg kawg ntawm 1500 rpm thiab siab dua.
Koj tswj hwm siv cov cuab yeej no li cas hauv kev lag luam tsheb? Nws yuav tsum tau hais tias cov viscous coupling tau tsim rov qab rau xyoo 1917 los ntawm American engineer Melvin Severn. Nyob rau hauv cov xyoo nyob deb, tsis muaj daim ntawv thov rau viscous coupling, yog li qhov invention tau mus rau lub txee. Thawj thawj zaug, nws tau kwv yees siv nws los ua ib qho cuab yeej rau kev kaw qhov chaw sib txawv nyob rau hauv lub sixties ntawm lub xyoo pua xeem. Thiab lawv tau pib nruab nws ntawm txhua lub log tsav SUVs.
Ntaus ntawv
Cov cuab yeej yooj yim heev:
- lub clutch yog nyob rau hauv daim ntawv ntawm ib lub tog raj kheej;
- sab hauv muaj ob lub shafts uas tsis cuam tshuam nrog ib leeg hauv lub xeev ib txwm - kev tsav tsheb thiab kev tsav tsheb;
- tshwj xeeb ua thiab tsav hlau disks txuas nrog rau lawv - muaj ntau heev ntawm lawv, lawv nyob coaxially thiab nyob ntawm qhov tsawg kawg nkaus ntawm ib leeg.
Nws yog ib nqi sau cia hais tias peb tau schematically qhia ib tug tshiab tiam viscous coupling. Ib tug laus version ntawm nws yog ib tug me me lub tog raj kheej hermetic nrog ob shafts, uas ob impellers tau muab tso rau. Cov shafts tsis mesh nrog ib leeg.
Paub txog cov cuab yeej, koj tuaj yeem twv tau yooj yim lub hauv paus ntsiab lus ntawm kev ua haujlwm. Piv txwv li, thaum lub tsheb nrog lub plug-in tag nrho-log tsav yog tsav ntawm txoj kev loj, kev sib hloov ntawm lub cav yog kis mus rau lub qag pem hauv ntej xwb. Cov shafts thiab disks ntawm cov viscous coupling tig ntawm tib lub nrawm, yog li tsis muaj kev sib xyaw ntawm cov roj hauv vaj tsev.
Thaum lub tsheb tsav mus rau hauv txoj kev av los yog daus thiab cov log ntawm ib qho ntawm cov axles pib plam, cov shafts nyob rau hauv cov viscous coupling pib tig ntawm qhov sib txawv ceev. Nws yog nyob rau hauv xws li tej yam kev mob uas cov khoom ntawm delatant kua manifest lawv tus kheej - lawv sai sai solidify. Raws li, lub zog traction los ntawm lub cav pib sib npaug rau ob lub qag. Txhua lub log tsav yog koom nrog.
Interestingly, lub viscosity ntawm cov kua yog nyob ntawm qhov ceev ntawm kev sib hloov. Qhov ceev ntawm ib lub axes tig, cov kua nplaum ntau dua, tau txais cov khoom ntawm cov khoom. Tsis tas li ntawd, niaj hnub viscous couplings yog tsim nyob rau hauv xws li ib txoj kev uas vim cov roj siab, discs thiab shafts yog glued ua ke, kom ntseeg tau tias kev sib kis ntawm siab tshaj plaws torque rau ob lub log qag.
Lub viscous coupling ntawm lub tshuab cua txias ua haujlwm ntawm tib lub hauv paus ntsiab lus, smoothly tswj lub kiv cua ceev. Yog hais tias lub cav khiav ntawm qis ceev yam tsis muaj overheating, ces lub viscosity ntawm cov kua yuav tsis nce ntau. Raws li, tus kiv cua tsis tig nrawm heev. Thaum lub nrawm nce, sib tov thiab solidification ntawm cov roj hauv lub clutch tshwm sim. Lub kiv cua pib tig txawm sai dua, coj cov cua ntws mus rau lub hlwb radiator.
Pros thiab Cons
Raws li koj tuaj yeem pom los ntawm cov ntaub ntawv saum toj no, cov viscous coupling yog ib qho kev tsim tawm tiag tiag. Tab sis nyob rau hauv xyoo tas los no, automakers tau loj heev tsis kam nruab nws, nyiam yuam kom tswj Haldex clutches. Qhov no yog vim qhov tseeb tias kev siv cov viscous couplings ntawm txhua lub log tsav tsheb nrog ABS yog teeb meem heev.
Tsis tas li ntawd, txawm hais tias tus qauv tsim yooj yim, cov viscous coupling yog qhov sib kis loj heev. Qhov loj ntawm lub tsheb nce, av clearance txo. Zoo, raws li kev xyaum qhia, qhov sib txawv ntawm qhov sib txawv ntawm tus kheej nrog lub viscous clutch tsis zoo heev.
Tshaj:
- yooj yim tsim;
- tuaj yeem kho ntawm nws tus kheej (ntxuam clutch);
- kaw vaj tsev;
- lub neej ua haujlwm ntev.
Nyob rau hauv ib lub sij hawm, viscous couplings raug ntsia rau tag nrho cov log tsav tsheb ntawm yuav luag tag nrho cov paub zoo automotive tuam txhab uas muag: Volvo, Toyota, Land Rover, Subaru, Vauxhall / Opel, Jeep Grand Cherokee, thiab lwm yam. Niaj hnub no, hluav taws xob systems nrog yuam locking. nyiam. Zoo, nyob rau hauv lub cav txias system, viscous couplings tseem ntsia tau rau ntau lub tsheb qauv: VAG, Opel, Ford, AvtoVAZ, KamAZ, MAZ, Cummins, YaMZ, ZMZ xyaw.
Loading…
