Sib nqus coupling yog ib qho tseem ceeb hauv kev siv cov khoom sib nqus mus tas li. Niaj hnub no, peb yuav qhia txog lub hauv paus ntsiab lus, kev faib tawm, thiab kev siv cov hlau nplaum sib txuas, thiab tseem tham txog cov hlau nplaum ruaj khov hauv cov hlau nplaum sib nqus.
Magnetic coupling yog dab tsi?
Coupling yog ib qho tseem ceeb hauv kev sib kis ntawm cov neeg kho tshuab, uas xa cov torque los ntawm kev sib txuas ntawm cov tsav tsheb thiab cov ncej tsav. Cov duab hauv qab no qhia ntau hom kev sib txuas, uas tuaj yeem pab koj nkag siab zoo dua qhov kev sib txuas yog dab tsi.
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Traditional couplings yog hom kev sib cuag thiab muaj cov txheej txheem nyuaj. Lawv yuav hnav thaum ua haujlwm txhua hnub. Yog tias overload tshwm sim, lwm yam khoom siv tshuab yuav raug hnav tawm, uas yog qhov tsis zoo rau kev ruaj ntseg ntawm cov cuab yeej siv tshuab ua haujlwm. Yog hais tias tus tsav ncej thiab tsav ncej ntawm lub coupling yuav tsum tau ua hauj lwm nyob rau hauv ob yam sib txawv xov xwm cais los ntawm ib leeg, sealing ntsiab yuav tsum tau siv rau dynamic sealing. Nyob rau hauv txoj kev no, muaj teeb meem ntawm ob qho tib si nce qhov kev sib hloov ua haujlwm kom ntseeg tau tias kev sib khi ruaj khov lossis tawg vim tsis zoo sealing. Tsis tas li ntawd, raws li cov khoom sib khi hnav thiab muaj hnub nyoog, cov dej xau yuav ua rau hnyav dua, tshwj xeeb tshaj yog nyob rau hauv cov tshuab uas muaj cov pa phem (cov kua dej tsis zoo). Thaum xau, nws yuav ua paug rau ib puag ncig thiab ua rau muaj kev phom sij rau lub neej.
Sib nqus couplings yog non-contact couplings, feem ntau yog tsim los ntawm ob lub hlau nplaum, nrog rau kev sib cais cover nyob rau hauv nruab nrab kom cais ob lub hlau nplaum. Cov hlau nplaum sab hauv txuas nrog rau qhov kis tau tus mob, thiab cov hlau nplaum sab nraud yog txuas nrog lub zog, xa hluav taws xob los ntawm kev sib cuam tshuam ntawm magnetic teb NS ncej txuas. Sib nqus couplings muaj kev ua haujlwm ntawm buffering thiab vibration absorption ntawm elastic couplings. Tsis tas li ntawd, nws rhuav tshem cov qauv kev sib txuas ntawm cov tsoos sib txuas thiab siv txoj cai tshiab sib nqus sib txuas kom ua tiav lub zog thiab lub zog sib kis ntawm cov ncej tsav thiab cov ncej tsav yam tsis muaj kev sib cuag ncaj qha, thiab tuaj yeem hloov cov ntsaws ruaj ruaj rau hauv cov ntsaws ruaj ruaj zoo li qub kom ua tiav xoom xoom. Yog li ntawd, nws yog dav siv nyob rau hauv lub sij hawm nrog tshwj xeeb yuav tsum tau rau to.
Classification ntawm magnetic couplings
Kev sib nqus sib nqus feem ntau suav nrog kev sib kis ntawm synchronous, hysteresis kis, thiab kev sib kis tam sim no. Vim lawv cov yam ntxwv sib txawv, lawv tau siv ntau yam. Synchronous kis tau tus mob yog hais txog lub synchronization ntawm cov zis thiab cov tswv yim. Muaj ob hom synchronous coupling qauv: planar magnetic coupling thiab coaxial magnetic coupling.
1. Planar magnetic coupling
Structure: Cov hlau nplaum yog ntsia rau ntawm ob lub discs ntawm tib txoj kab uas hla ntawm NS ncej. Thaum siv, ob lub discs raug ntsia rau ntawm lub tsav tsav thiab lub zog tsav raws li, tawm hauv qhov sib txawv ntawm huab cua.
Lub hauv paus ntsiab lus: Txij li thaum N ncej ntawm hlau nplaum A nyiam S ncej ntawm hlau nplaum B nyob rau sab nraud thiab rov qab N ncej ntawm ob sab ntawm hlau nplaum B, nws tau ua kom ntseeg tau tias nyob rau hauv ib qho kev sib tw, cov ncej tsav thiab cov ncej tsav tsheb khaws cia. rotating synchronously.
Torque: Qhov kev sib kis no muaj cov qauv yooj yim thiab tsis tas yuav muaj kev sib koom siab siab ntawm ob lub shafts thaum lub sijhawm teeb tsa. Txij li thaum nws siv lub hauv paus ntsiab lus ntawm lub dav hlau attraction, qhov me me ntawm qhov sib txawv ntawm huab cua, qhov ntau dua lub torque. Tsis tas li ntawd, txij li thaum lub torque kis tau yog proportional rau lub disc cheeb tsam, lub torque ntawm no sib nqus coupling yuav tsis loj heev, txwv tsis pub nws yuav loj heev thiab nyuaj rau nruab.
2. Coaxial magnetic coupling
Coaxial magnetic coupling yog cov khoom siv sib nqus sib nqus feem ntau siv tam sim no, thiab nws daim ntawv thov raug yog lub twj tso kua mis sib nqus.
Structure: Coaxial magnetic coupling muaj cov txheej txheem rotor, sab hauv rotor, lub tes tsho cais, thiab cov kabmob. Cov hlau nplaum yog ntsia rau ntawm sab nraud ntawm lub rotor sab hauv thiab sab hauv ntawm lub rotor sab nraud. Cov hlau nplaum yog cov ncej thiab txheej txheej ncig hauv NS cross hom. Kho qhov chaw ua hauj lwm ntawm cov hlau nplaum ntawm sab hauv thiab sab nrauv rotors, uas yog, tsis siv neeg coupling. Lub tes tsho cais thiab cov kabmob feem ntau yog siv rau hauv cov qauv ntawm cov hlau nplaum sib nqus.
Huab cua sib txawv thiab kev sib cais: Muaj qee qhov sib txawv ntawm huab cua ntawm sab hauv thiab sab nrauv rotors, uas yog siv los cais cov khoom nquag thiab tsav. Qhov sib txawv ntawm huab cua feem ntau yog nyob nruab nrab ntawm 2 hli -8mm. Qhov me me ntawm qhov sib txawv ntawm huab cua, qhov kev siv tau zoo ntawm cov hlau nplaum ntau dua, tab sis qhov kev sib cais nyuaj dua; qhov loj dua qhov sib txawv ntawm huab cua, qhov yooj yim dua qhov kev sib cais, tab sis qhov tsis tshua muaj txiaj ntsig ntawm kev siv cov hlau nplaum ntawm cov hlau nplaum. Lub vojvoog txoj haujlwm ntawm qhov sib txawv ntawm huab cua yog lub vojvoog ua haujlwm ntawm qhov sib nqus sib nqus. Thaum tsim, lub torque ntawm qhov yuav tsum tau kis tau tus mob tuaj yeem tau los ntawm kev kho qhov loj ntawm qhov sib txawv ntawm lub vojvoog.
Thaum lub load tshaj qhov siab tshaj plaws torque, lub kis tau tus mob pib "plam", uas yog, cov hlau nplaum dhia los ntawm lub tam sim no coupling xeev mus rau lub tom ntej no coupling xeev los ntawm lub voj voog. Thaum lub sij hawm no slipping txheej txheem, lub magnetic teb nyob rau hauv cov huab cua sib txawv sai heev, thiab cov hlau nplaum ntawm lub puab thiab sab nrauv rotors demagnetized los ntawm ib leeg nyob rau tib lub sij hawm, generating tshav kub. Nyob rau hauv ib lub sij hawm luv luv, qhov kub thiab txias tuaj yeem nce mus rau ntau tshaj 100 degrees Celsius, ua rau cov hlau nplaum demagnetize thiab kev sib kis yuav raug muab pov tseg. Yog li ntawd, txawm hais tias hom kev sib kis no tuaj yeem ua lub luag haujlwm ntawm kev tiv thaiv overload, nws feem ntau tsis siv los ua cov khoom tiv thaiv overload.
3. Hysteresis kis tau tus mob
Hysteresis kis tau tus mob yog ib txoj kev sib kis uas siv lub hauv paus ntsiab lus hysteresis. Kev sib kis hysteresis feem ntau yog cov qauv coaxial zoo ib yam li synchronous transmissions. Qhov txawv yog tias sab hauv thiab sab nrauv rotors siv cov khoom sib nqus sib txawv. Feem ntau hais lus, lub rotor sab hauv (tus ncej nquag) siv cov khoom siv nrog kev sib koom tes siab thiab kev ua haujlwm siab, xws li neodymium hlau boron. Lub rotor sab nrauv (driven ncej) siv cov khoom sib nqus nrog qis coercivity, xws li txhuas nickel cobalt. Cov hlau nplaum ntawm lub active ncej yog teem crosswise raws li NS ncej. Thaum lub load tsis siab tshaj qhov ntsuas torque, cov ncej tsav rotates synchronously nrog lub active ncej; Thaum lub load tshaj qhov ntsuas tus nqi, lub puab thiab sab rotors plam, thiab tsuas yog cov rated torque yog kis mus rau lub ncej tsav. Lub zog tshaj yog tso tawm nyob rau hauv daim ntawv ntawm tshav kub thaum lub sij hawm tus txheej txheem ntawm lub puab hlau nplaum them thiab demagnetizing lub sab nrauv hlau nplaum.
Cov qauv hysteresis kis tau tus mob no feem ntau pom nyob rau hauv cov tshuab magnetic capping, uas tuaj yeem xyuas kom meej tias lub kaus mom lub raj mis muaj lub zog nruj txaus yam tsis muaj kev puas tsuaj rau lub hau lub raj mis.
4. Eddy Current Drive
Hloov cov khoom siv hlau nplaum tas mus li ntawm qhov tsav ntawm ib qho ntawm cov lus saum toj no-hais sib nqus couplings nrog cov ntaub ntawv tsis-ferromagnetic nrog cov khoom siv zoo, xws li tooj liab thiab txhuas, tuaj yeem ua tiav kev sib kis tam sim no, txawm hais tias kev sib kis tau zoo yuav tsis siab heev. Cov qauv yooj yim disc eddy tam sim no kis tau tus mob yog pom nyob rau hauv daim duab:
Ntawm lub active disc, cov hlau nplaum ua haujlwm siab tau teeb tsa hauv NS cross hom. Lub disc tsav yog ua los ntawm tooj liab nrog zoo conductivity. Cov kab sib nqus ntawm lub zog dhau los ntawm cov tooj liab disc. Lub active disc rotates, thiab eddy tam sim no tsav lub tooj liab disc tsav mus ua raws li kev sib hloov.
Eddy tam sim no kis tau tus mob yuav synchronous los yog asynchronous. Kom meej meej, synchronous eddy tam sim no kis tau tus mob feem ntau muaj me me (5%) ntawm asynchrony. Piv txwv li, cov tswv yim yog 1000 rpm thiab cov zis yog 950 rpm. Qhov no asynchrony tuaj yeem lees txais raws li kev sib kis. Daim ntawv thov raug siv ntawm asynchronous eddy kis tau tus mob tam sim no yog qhov kev tswj nruj ntawm txoj kab rov qab. Los ntawm kev tswj hwm tshwj xeeb, kev tswj hwm kev ua haujlwm ceev hauv qee qhov ntau kuj tuaj yeem ua tiav los ntawm kev sib kis tam sim no.
Cov hlau nplaum tas mus li siv hauv cov hlau nplaum sib nqus
Kev tsim thiab kev loj hlob ntawm cov hlau nplaum sib txuas yog ze rau qhov kev nce qib ntawm cov khoom sib nqus mus tas li. Sib nqus couplings yog Ameslikas tsim los ntawm cov ntaub ntawv ferrite, tab sis vim lawv cov khoom sib nqus tsis tshua muaj, lawv tsuas tuaj yeem xa cov torques me me hauv tib lub ntim raws li cov khoom sib nqus, uas txwv txoj kev loj hlob ntawm magnetic couplings.
Cov khoom sib nqus ntawm cov khoom siv hlau nplaum thib ob nyob ruaj khov samarium cobalt thiab txhuas nickel cobalt hlau nplaum (AlNiCo) muaj ntau dua li cov khoom siv ferrite, yog li cov khoom sib nqus hlau nplaum tuaj yeem xa cov torques loj dua. Txawm li cas los xij, tus nqi siab ntawm samarium cobalt thiab aluminium nickel cobalt tiag txwv txoj kev loj hlob ntawm cov hlau nplaum sib txuas.
Qhov siab tshaj plaws magnetic zog khoom (BH) ntawm neodymium hlau boron (NdFeB) cov khoom sib nqus ruaj khov yog 428kJ / m3, ua rau nws thib peb tiam ntawm cov khoom siv hlau nplaum ruaj khov tom qab samarium cobalt. NdFeB tsis tsuas yog muaj cov khoom sib nqus zoo dua tab sis kuj muaj kev sib tw ua lag luam muaj zog dua. NdFeB muaj cov khoom siv hluav taws xob sib nqus siab, xav tau tsawg dua, muaj kev ua haujlwm zoo, tuaj yeem txiav thiab drilled, thiab muaj cov txiaj ntsig siab. Yog li ntawd, nws tuaj yeem txo qhov ntim ntawm cov hlau nplaum sib nqus, txo cov nqi, thiab txhim kho kev ua haujlwm zoo. Nws tau dav siv nyob rau hauv sib nqus kis couplings.