2024 Tus sau: Sierra Becker | [email protected]. Kawg hloov kho: 2024-02-26 05:16
Hauv hluav taws xob engineering, peb feem ntau tuaj hla lub tswvyim ntawm "compound". Nws yog dab tsi? Lub compound yog ib qho insulating muaj pes tsawg leeg uas yog kua thaum lub sij hawm siv, thiab ces hardens, tsis muaj cov kuab tshuaj. Lub compound tsis poob nws cov khoom ntawm qhov kub ntawm -50 txog +200 degrees Celsius, tiv taus hluav taws xob, yog npaj rau impregnation, casting ntawm cov khoom, qhov chaw ntawm cov khoom siv hauv xov tooj cua, hluav taws xob engineering, tiv thaiv cov ntawv luam tawm Circuit Court boards thiab lawv cov khoom los ntawm sab nraud. cuam tshuam (mechanical, thermal, chemical, vibration), tshwj xeeb tshaj yog nyob rau hauv ib puag ncig nruj. Tom qab tag nrho, cov xwm txheej raws li qhov yuav tsum tau ua haujlwm hauv xov tooj cua-electronic thiab cov khoom siv hluav taws xob thiab cov cuab yeej siv tau nyob deb ntawm cov chaw sim. Cov no yog qhov kub thiab txias ntawm Far North, thiab high humidity ntawm huab cua sov, thiab aggressive ib puag ncig ntawm sab nrauv, thiab lwm yam. Tag nrho cov saum toj no quab yuam kev loj hlob engineers siv, nrog rau noo noo-repellent coatings, compound cov ntaub ntawv rau pouring. thiab sealing cov khoom thiab cov khoom siv rau kev tiv thaiv. Feem ntau, ob lub ntsiab lusmixes.
Los ntawm cov khoom, cov khoom sib txuas tau muab faib ua:
- impregnation;
- hluav taws xob insulating;
- filling;
- elastic;
- plasticized nrog roj hmab;
- nrog tsawg molecular hnyav plasticizer.
Impregnation compound yog ib qho muaj pes tsawg leeg uas yog siv los impregnate lub windings ntawm hluav taws xob motors thiab khoom siv.
Insulating, tig, muab faib ua:
- thermosetting (tsis soften tom qab kho). Cov no suav nrog epoxy, polyester thiab lwm yam resins;
- thermoplastic (mos thaum rhuab) - bitumen, waxy dielectrics, thermoplastic polymers (polystyrene, polyisobutylene).
Sealing compound yog ib qho muaj pes tsawg leeg tsim los sau cov kab noj hniav hauv cov thawv cable, nrog rau kev sib khi hauv cov tshuab hluav taws xob thiab cov khoom siv.
Hluav taws xob rwb thaiv tsev sib xyaw yog tsim los ntawm methacrylic esters, siv ob qho tib si impregnating thiab txhaws. Xws li cov tebchaw, tom qab hardening ntawm ib tug kub ntawm 70-100 degrees Celsius (nrog ib tug tshwj xeeb hardener, qhov pib no poob mus rau 20 degrees), ua thermosetting thiab yuav siv tau ntawm kub ntawm -55 mus rau +105 degrees. Lawv yog siv los impregnate ntau yam khoom rotating (coils thiab windings ntawm hluav taws xob motors, thiab lwm yam), uas muab kev tiv thaiv zoo tiv thaiv hluav taws xob tam sim no.
Filling compound raws li bitumen nyob rau hauv cov nqe lus ntawm tshav kub tsis kam (105 degrees) belongs rau chav kawm "A". Epoxy resins muaj qhov ua kom sov siab tshaj plaws.organosilicon compounds.
Elastic, roj hmab-plasticized compounds tau pom kev siv tshwj xeeb. Niaj hnub no compound rau cov ntaub ntawv yog nrov heev. Saj zawg zog silicone txhaj pwm ntawm ntau yam configurations yog tsim los ntawm nws. Cov txheej txheem kub ntawm qhov sib xyaw ua ke nce mus txog +200 ° C, nws tsis pom zoo kom sov nws siab tshaj 250 ° C, vim tias cov ntaub ntawv polymer raug puas tsuaj.
Tam sim no, ntau hom kev sib txuas tau tsim, txhua tus tau pom nws tus kheej daim ntawv thov thiab muaj cov yam ntxwv ntawm nws.
Epoxy compound tau dhau los ua neeg nyiam tshaj plaws - nws yog cov khoom siv polymer nrog qis qis, zoo heev dielectric yam ntxwv thiab siab adhesion. Nws muaj peev xwm ua hauj lwm nyob rau hauv tej yam kev mob ntawm tas li deformation. Epoxy resins tau siv dav hauv ntau hom khoom siv, kev teeb tsa, cov qauv. Cov kev sib xyaw no kuj tau sib xws nrog lwm cov oligomers, thiab lawv qhov kev kho yog nrawm los ntawm kev sib xyaw nrog lwm cov tebchaw. Qhov tsis zoo ntawm cov epoxy compound yog qhov ua haujlwm kub qis, uas ua rau nws tsis tuaj yeem siv nws hauv cov khoom siv uas ua haujlwm hnyav heev.
Summarizing, peb tuaj yeem hais tias kev siv cov khoom sib xyaw ua kom muaj kev ntseeg siab ntawm kev ua haujlwm thiab ua rau lub neej ua haujlwm ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, ua kom lawv cov sealing thiab tiv thaiv kev co, thiab pab tiv thaiv cov neeg siv khoom los ntawm hluav taws xob tam sim no.
Pom zoo:
Yuav ua li cas thaij duab zoo: xaiv qhov chaw, teeb tsa, keeb kwm yav dhau, cov cuab yeej zoo, cov phiaj xwm kho duab thiab cov lus qhia los ntawm cov kws yees duab
Nyob hauv lub neej ntawm txhua tus neeg muaj ntau yam xwm txheej uas koj xav kom nco ntsoov mus ntev, yog vim li cas peb thiaj li nyiam yees duab lawv heev. Txawm li cas los xij, feem ntau tshwm sim tias peb cov duab tuaj yeem ua tsis tiav thiab lawv txawm txaj muag los luam tawm. Txhawm rau kom cov duab tig tawm zoo nkauj, koj yuav tsum paub ntau yam kev cai tseem ceeb, qhov tseem ceeb ntawm qhov sib piv golden thiab muaj pes tsawg leeg
Sicilian tiv thaiv. Najdorf variant: kev faib tawm, kev ntsuam xyuas, cov lus pom zoo ntawm cov kev xaiv nyuaj thiab cuam tshuam
Dab tsi yog Sicilian Defense hauv chess? Ntau yam sib txawv ntawm Sicilian tiv thaiv. Lub tswv yim dav dav ntawm kev tiv thaiv thiab pom zoo ua ntej txav. Kev txhim kho ntawm qhov kev ua si hauv Sicilian Defense ntawm Najdorf Variation. Peculiarities ntawm Dawb thiab Dub Ua Si hauv Najdorf Variation thaum lub sij hawm English Attack thiab Adams Attack
Cov lus qhia rau cov pib tshiab: yuav ua li cas ua haujlwm nrog cov av nplaum polymer. Cov khoom siv thiab cov cuab yeej tsim nyog, cov txheej txheem ua haujlwm
Ib qho ntawm cov khoom muaj tswv yim nrov tshaj plaws yog cov av nplaum polymer. Cov hniav nyiaj hniav kub, khoom plig, khoom ua si, thiab lwm yam yog tsim los ntawm nws, Yuav kom paub cov txheej txheem ntawm kev ua hauj lwm nrog polymer av nplaum, koj yuav tsum xav txog cov lus qhia ntawm cov kws paub txog craftsmen. Muaj ntau ntau subtleties thiab nuances, qhov kev paub uas yuav tso cai rau koj kom tsis txhob ua yuam kev loj. Tom ntej no, xav txog cov tswv twg muab tswv yim rau cov pib tshiab thiab yuav ua li cas ua haujlwm nrog cov av nplaum polymer
Rosary weaving: lub hom phiaj ntawm rosary, cov txheej txheem ntawm kev ua tiav, cov ntaub ntawv tsim nyog thiab cov cuab yeej, cov lus qhia ua ntu zus rau kev ua haujlwm thiab cov kws tshaj lij cov lus qhia
Ntau zaus hauv lub neej niaj hnub muaj xws li "rosary". Ntau tus neeg tsis txawm muaj qhov tsis paub txog lub hom phiaj ntawm tus cwj pwm no. Kab lus no tham txog dab tsi keeb kwm thiab lub hom phiaj ntawm rosary muaj, thiab tseem sau ib txoj hauv kev los xaws cov rosary kom zoo
Cov duab kos los ntawm cov ntaub qhwv nrog koj tus kheej tes: txheej txheem, cov ntaub ntawv tsim nyog thiab cov cuab yeej, cov lus qhia ua ntu zus
Muaj qee lub sijhawm thaum cov duab kos nrog cov xim thiab cov txhuam hniav yog qhov xav tau zoo kawg. Txawm li cas los xij, tam sim no lawv muaj tsawg dua hauv kev thov. Lawv sib tw nrog paintings los ntawm shreds ntawm ntaub. Txawm tias cov neeg uas tsis tau paub txog cov txheej txheem no yuav muaj peev xwm ua tau zoo li no nrog lawv tus kheej tes. Qhov tseem ceeb tshaj plaws yog ua tib zoo kawm cov ntaub ntawv hauv qab no