Pūhui - Ko te tiaki pono o te taputapu i ngā taiao pakeke

I roto i te engineering hiko, farerei pinepine tatou i te wā "pūhui". He aha te mea te reira? Pūhui - Ko he pūhui te tuuraa i taua i te wa o te whakamahi ko te wai, a ka whakaorangia kei roto i ona whakarewa hanganga kore. E kore e te pūhui ngaro ona āhuatanga i te whānuitanga pāmahana i -50 ki te +200 degrees, he ātete ki te radiation mo te impregnation, ringihia kōpuku, wahi irirangi, tiaki hiko mō te papa iahiko tā me ratou wāhanga ki awenga waho (aunoa, waiariki, matū, wiri), rawa i roto i ngā taiao kaikiri. I muri i te katoa, he tawhiti atu i te taiwhanga nga tikanga i raro i nei i ki te whakahaere pūrere hiko, me te hiko me apparatuses. Tenei pāmahana iti o te Far Te Tai Tokerau, me te haumākū nui o te āhuarangi pārūrū, me te taiao kino o te wāhi, me pera i runga i. D. katoa o nga Engineers hoahoa kei te akina i runga ki te te tiaki i te whakamahi i runga i te par ki coatings makuku atiati whakaranu rauemi mō te mātotoru me te encapsulation wāhanga, me te taputapu. Nuinga o ngā wā e whakamahia ana mō tenei whakaaro ranunga e rua-wae.

Na roto i te āhuatanga o ngā pūhui e wehea ki:

- impregnation;

- hiko;

- makanga;

- tāwariwari;

- rapa plasticized;

- he iti plasticizer taimaha rāpoi.

Impregnating pūhui - he pūhui whakamahia e te mo te impregnation o kopiko o motors me mihini.

Tuuraa i, i roto i te tahuri, kua wehea ki:

- thermoset (e kore e fakamolū i muri i te whakaora). Ko ētahi o ēnei epoxy, pareaku me ētahi atu resins;

- rewarau (fakamolū ki runga ki whakawera) - bitumens dielectrics parikoriko, waerau rewarau (terei, polyisobutylene).

Whakakī pūhui - he hanganga hoki te whakakī kōwhao pouaka taura, kia rite ki te pai kia rite ki hoki taatiraa i roto i mihini me ngā pūrere hiko.

Te tuuraa i ranunga hanga i hākawa methacrylic, e whakamahia rite rua te impregnation me whakarewanga. Taua pūhui i muri i te whakaora i te pāmahana o 70-100 degrees (ki hardener motuhake, tuku iho tenei paepae te ki te 20 nga nekehanga), kei te rewatau a taea te whakamahi i pāmahana i -55 ki +105 nekehanga. E whakamahia ratou mo te impregnation o ngā momo o tītaka taputapu (me te pōkai awhiowhio te motors me al.) nei homai tiaki whai hua ki electrocution.

Te mātotoru pūhui e hāngai ana i runga i uku i runga i te taumata o te ātete wera (105 ° C) no ki te piha haapiiraa "A". He te resistance wera epoxy me silicone teitei pūhui.

Kua kitea rapa ranunga rapa plasticized tono ngā. I teie mahana, he pūhui rawa rongonui mō ngā puka. No te mea kua meinga reira pakete silicone ngāwari o whirihoranga rerekē. tae te tikanga pāmahana o te pūhui te rohe ki + 200 ° C, ko reira wera ki runga 250 ° e kore e C tūtohu hoki ngaro te waerau te hononga.

I tēnei wā hua reira ngā kōeke o pūhui, ia o nei kua kitea e tona whānuitanga me te roaa āhuatanga angamaheni o reira.

ka te nuinga rongonui epoxy pūhui - he waerau ki te na'ina'iraa iti, āhuatanga uruhanga pai, me te adhesion tiketike. He mea e taea ki te mahi i roto i ngā āhuatanga o te deformation tūturu. resins epoxy Kei te whakamahia whānuitia i roto i ngā taputapu, tāuta, hanganga. He hototahi ki te atu oligomers enei ranunga me te whakatere ratou pakeke mā te ranu ki ētahi atu pūhui. Ko te drawback o epoxy kapia ko te pāmahana whakahaere iti, e hanga ana e ia e taea ki te whakamahi i te reira i roto i te tikanga e mahi i roto i te tikanga, kaua pakeke.

Whakarāpopoto, ka taea e tatou te mea e te whakamahi o pūhui faarahi te tika whakahaere, me te whakawhānui i te ora mahi o ngā pūrere hiko, me te taputapu hiko, whakarite ratou taatiraa, me te tiaki ki wiri, tauturu tiaki kiritaki i nāianei hiko.