Tiabsis cov - yog ib tug txhim khu kev qha kev tiv thaiv ntawm cov khoom los ntawm hnyav kev kawm

Nyob rau hauv hluav taws xob engineering, peb feem ntau ntsib lub sij hawm "compound". Yuav ua li cas yog nws? Tiabsis cov - yog ib insulating compound hais tias thaum lub sij hawm ntawm qhov kev siv yog ib tug ua kua, thiab ces kho tsis yog nyob rau hauv nws muaj pes tsawg leeg cov kuab tshuaj. Cov compound tsis plam nws cov khoom ntawm ib tug kub ntau los ntawm -50 mus +200 degrees Celsius, yog resistant mus tawg rau impregnation, pouring ntshav, xov tooj cua qhov chaw, hluav taws xob kev tiv thaiv rau cov ntawv luam Circuit Court laug cam thiab lawv lub Cheebtsam tiv thaiv sab nraud influences (mechanical, thermal, tshuaj, kev co), tshwj xeeb tshaj yog nyob rau hauv hostile ib puag ncig. Tom qab tag nrho, lub tej yam kev mob nyob rau hauv uas muaj rau koj khiav lag luam siv hluav taws xob thiab hluav taws xob pab kiag li lawm thiab apparatuses yog cov nyob deb ntawm txoj kev kuaj. Qhov no tsis tshua muaj kub ntawm lub Far North, thiab siab humidity ntawm lub teb chaws sov kev nyab xeeb, thiab lub hostile ib puag ncig ntawm qhov chaw, thiab thiaj li nyob. D. Tag nrho cov saum toj no yog yuam tsim engineers los tiv thaiv cov kev siv nyob rau hauv ib tug par nrog dej pleev cov tshuaj coatings compounded ntaub ntawv rau Potting thiab encapsulation Cheebtsam thiab cov khoom siv. Feem ntau cov feem ntau siv rau lub hom phiaj no ob-tivthaiv mixtures.

Los ntawm thaj chaw ntawm tebchaw yuav muab faib mus rau hauv:

- impregnation;

- hluav taws xob;

- casting;

- Elastic;

- plasticized roj hmab;

- ib tug tsawg molecular yuag plasticizer.

Impregnating compound - ib tug compound uas yog siv rau impregnation ntawm windings ntawm motors thiab cov cav tov.

Insulating, nyob rau hauv lem, muab faib mus rau hauv:

- thermoset (tsis muag tom qab tua). Cov no muaj xws epoxy, polyester thiab lwm yam resins;

- thermoplastic (muag raws li qhov cua kub) - bitumens waxy dielectrics, thermoplastic polymers (polystyrene, polyisobutylene).

Filling compound - ib tug muaj pes tsawg leeg rau sau muaj kab noj hniav cable thawv, raws li zoo raws li rau kev sib khi nyob rau hauv hluav taws xob cav tov thiab pab kiag li lawm.

Insulating sib tov ua los ntawm methacrylic esters, yog siv raws li ob lub impregnation thiab casting. Tej tebchaw tom qab tua ntawm ib tug kub ntawm 70-100 degrees Celsius (nrog tshwj xeeb hardener, qhov no pib yog lowered mus rau 20 degrees), yog thermosetting thiab yuav siv tau rau kub los ntawm -55 mus +105 degrees. Lawv yog siv rau lub impregnation ntawm ntau hom ntawm rotating cov khoom (thiab cov kauj winding motors thiab al.) Txoj twg yuav muab zoo tiv thaiv tawm tsam electrocution.

Potting compound raws li nyob rau hauv bitumen nyob rau theem ntawm tshav kub tsis kam (105 ° C) no belongs rau lub chav kawm ntawv "A". Nws muaj lub siab tshaj plaws thaum tshav kub kub kuj epoxy thiab silicone tebchaw.

Elastic plasticized roj hmab mixtures tau pom kev daim ntawv thov. Hnub no yog heev nrov compound rau cov ntaub ntawv. Vim hais tias nws yog los saj zawg zog silicone pwm ntawm txawv configurations. Qhov kub tsoom fwv ntawm lub compound nce mus txog ib tug txwv rau + 200 ° C, nws yog rhuab tshaj 250 ° C yog tsis pom zoo vim hais tias cov polymer puas linkages.

Tam sim no nws ua ntau yam qib ntawm tebchaw, txhua tus uas tau pom nws tau thiab possesses zog raug ntawm nws.

Feem ntau cov nrov ua epoxy compound - ib tug polymer nrog tsawg shrinkage, yav tom ntej dielectric yam ntxwv thiab siab adhesion. Nws yog tau mus ua hauj lwm nyob rau hauv tej yam kev mob ntawm mus tas li deformation. Epoxy resins yog lug siv nyob rau hauv ntau yam khoom, sib, yog lug. Cov mixtures yog tshaj nrog rau lwm cov oligomers thiab leeb lawv hardening los ntawm nws nrog rau lwm cov tebchaw. Lub drawback ntawm epoxy cob yog ib tug uas tsis muaj kev khiav hauj lwm kub, uas ua rau nws tsis yooj yim sua rau siv nyob rau hauv ib tug txheej txheem uas ua hauj lwm nyob rau hauv ib tug es hnyav tej yam kev mob.

Ntsiab lus, peb yuav hais tias cov kev siv ntawm tebchaw tsub kom ua hauj lwm muaj kev cia siab thiab ncua cov kev pab cuam lub neej ntawm hluav taws xob thiab hluav taws xob khoom, kom lawv khi thiab tiv thaiv tawm tsam kev co, yuav pab tiv thaiv tau txais kev pab los ntawm hluav taws xob tam sim no.