He aha te rauemi pai rawa atu mō te hiri ā-ringa ātete ki te waikura?

Kupu Whakataki

Ko te whiriwhiri i tētahi rauemi mō tētahi hiri ā-ringa ātete-waikura ehara i te mea ko te kimi i tētahi kōwhiringa "pai" whānui, engari ko te whakataurite i ngā mata hiri, ngā elastomers, me ngā wāhanga whakarewa ki ngā āhuatanga wai, pāmahana, pēhanga, me te whakahaere. Mā te huinga hē ka tere ake te pakaru, ka puta te whakaeke matū, ka poto ake te roa o te hiri, ka puta ai te turuturu, te wā kore mahi, me ngā mōrearea haumaru. E whakamārama ana tēnei tuhinga i te mahi a ngā kōwhiringa rauemi noa pēnei i te silicon carbide, te tungsten carbide, te Hastelloy, te PTFE, me ngā elastomers motuhake i roto i te ratonga waikura, me pēhea te aromatawai i a rātou i runga i te matū tukanga kia taea ai e koe te tautuhi i te hanganga hiri tino tika mō tō tono.

He aha te Hiranga o te Kōwhiringa Rauemi mō ngā Hiri Ātete-Waikura

Te tohu i tētahihiri ā-ringa ātete-waikuratētahi o ngā whakataunga hangarau tino nui i roto i ngā pūnaha whakahaere wai.Ko ngā hiri miihini te ārai matuai waenga i ngā wai tukanga kaha me te taiao o waho, e ārai ana i ngā tukunga kino me te tiaki i ngā wāhanga papu o roto. I te tukatuka i ngā pāpāho tino waikura—pērā i ngā waikawa kaha, ngā kawakawa waikura, ngā whakarewa kaha rānei—kāore rawa he āputa hapa. Ka tere te pirau o ngā rauemi, ka kore e taea te pupuri, ka tūpono ki te taiao, ka kino hoki ngā taputapu.

Ko te tukanga whiriwhiri e hiahia ana kia mārama whānuitia te mahi whakarewa, te tribology, me te matū elastomer. Ehara te hiri miihini i te wāhanga kotahi; he huihuinga o ngā mata hurihuri me ngā mata tūmau, ngā huānga hiri tuarua, me ngā taputapu whakarewa. Me tū motuhake ia o ēnei wāhanga ki te taiao matū, me te pupuri tonu i ngā ātete miihini tika i raro i ngā pēhanga me ngā pāmahana rerekē. Ki te kore e taurite ngā rauemi tika ki te matū wai motuhake, ka tino whakaitihia te Wā Tohatoha i waenganui i ngā Rahunga (MTBF) ā, ka whakanuia ake ngā mōrearea whakahaere.

Te matū o te tukanga, te mōrearea turuturu, me te pānga ki te wā kore mahi

Ko te matū tukanga te mea e whakatau ana i te tere me te tikanga o te pirau rauemi. Ka taea e ngā wai ahumahi te whakaatu i ngā taumata pH tino nui, mai i te tino waikawa (pH < 1) ki te tino kawakore (pH > 13), he rerekē te whakaekenga o ia rauemi. Hei tauira, ka taea e ngā waikawa whakahāngai pērā i te waikawa hauota te whakakore i ētahi maitai kore waikura engari ka tere te whakangaro i ngā mata hiri waro paerewa. Hei tāpiri, ko ngā poke iti, e kore e arohia i roto i ngā whakaritenga wai nui, ka taea te mahi hei whakakorikori mō ngā tikanga waikura ā-rohe pērā i te waikura poka, te waikura kapiti rānei.

Ko te mōrearea turuturu e pā ana ki te kōwhiringa rauemi hē ka horapa atu i tua atu i te rahunga miihini noa iho. I roto i te tukatuka matū me te whakamahine hinu, me tino pehi ngā matū waro pūngoi (VOC) me ngā poke hau kino. He maha ngā wā ka whakahaua e ngā ture a te Environmental Protection Agency (EPA) kia noho tonu ngā tukunga hiri papu i raro i te paepae 500 wāhanga ia miriona (ppm). Ka taea e te pakaru i te mata hiri i puta mai i te waikura, te pakaru rānei o te elastomer te takahi tonu i ngā ture, ka hiahiatia he kati ohorere, ā, ka akiaki i te ripoata taiao ā-ture.

Ko ngā utu rahunga e hono ana ki te hototahitanga ngoikore o ngā rauemi

Ko ngā hua pūtea o te kore hototahi o ngā rauemi he nui atu i te utu hoko tuatahi o te hiri mīhini tonu. Ina pakaru wawe te hiri nā te whakaekenga matū, ka nui haere ngā utu whakakapinga tika e te mahi e hiahiatia ana mō te tango papu, te whakakorenga poke, me te tāuta anō. He mea nui ake, ko ngā utu ā-kore e pā ana ki te wā whakamutu kore i whakamaheretia ka tino nui. I roto i ngā whare tukatuka tonu e tere haere ana te mahi, ka taea e te pakaru ohorere o te papu te aukati i te raina whakaputa, ka puta he utu wā whakamutu mai i te $10,000 ki te neke atu i te $50,000 ia haora i runga i te ahumahi me te uara hua.

Hei tāpiri, ka taea e te turuturu waikura te whakararu i ngā taputapu e karapoti ana. Mā te hiri kua pakaru ka taea e ngā matū kaha te whakaeke i te pou papu, ngā peera, me ngā whare motuka. Ko te mea i tīmata hei pakaru hiri ā-rohe i te tīmatanga ka tere te huri hei pakaru papu kino e hiahia ana kia hangaia anō te anga peera katoa, kia whakakapia rānei te peera. Mā te haumi ki ngā rauemi ātete waikura e tika ana i te tīmatanga—ahakoa ka piki ake te utu o te wāhanga tuatahi mā te 200% ki te 300%—ka hua ake he Hokinga Pūtea (ROI) teitei ake mā te whakaroa i te MTBF mai i ētahi marama ki ētahi tau.

Ngā Kōwhiringa Rauemi mō ngā Hiri Ātete-Waikura

Ko te hanga i tētahi hiri ā-ringa ātete-waikura me whiriwhiri i ngā rauemi motuhake mō ngā rohe motuhake e toru: ko ngā mata hiri tuatahi, ko ngā taputapu whakarewa (ngā puna, ngā pine taraiwa, me ngā repe), me ngā huānga hiri tuarua (ngā mowhiti-O me ngā gasket). He rerekē ngā taumahatanga mahi a ia rohe, ko te tikanga he rauemi e tino pai ana te mahi hei mowhiti-O pumau, kāore pea e pai mō tētahi mata hiri hihiri, whakaputa wera.

Ngā rauemi mata hiri pērā i te silicon carbide

Ko ngā mata hiri tuatahi ngā wāhanga tino nui, nā te mea ka mau tonu he kiriata wai moroiti i a rātou e hurihuri ana tetahi ki tetahi.Karāhe hiraka (SiC)e kiia whānuitia ana ko te rauemi mata hiri matua mō te ratonga matū kaha. Ina koa, ko te karawiti silicon kua whakatōkia tika (alpha) e tuku ana i te ātete matū tata ki te ao puta noa i te awhe pH o te 0 ki te 14, ā, ka taea te tu atu i ngā pāmahana whakahaere tae atu ki te 300°C (572°F). He rerekē ki te karawiti silicon kua honoa-tauhohenga, kei roto nei te silicon kore utu ka taea te tango atu i roto i ngā matū kaha, i te waikawa hydrofluoric rānei, ka noho pumau tonu te hanganga o te SiC kua whakatōkia ā-alpha i roto i te nuinga o ngā pāpāho kaha.

Ko ētahi atu kōwhiringa rauemi mata ko te tungsten carbide (WC) me ngā momo waro rerekē. He tino pakari te tungsten carbide, ā, he ātete ki te pānga, he pai mō ngā paru whakakoi, engari ko tōna ātete matū he tino whakawhirinaki ki tōna hononga. Ko te tungsten carbide e herea ana ki te nikara te mea e pai ake ana i ngā momo herea-kobalt i roto i ngā taiao waikura, ahakoa kāore tonu i te rite ki te SiC i roto i ngā waikawa kaha. Ko ngā mata waro kua whakakīia ki te antimony, kua whakakīia rānei ki te resin, he maha ngā wā ka whakamahia hei mowhiti hono ki te SiC nā ō rātou āhuatanga whakahinuhinu-ake, mena kāore he matū whakahāngai kaha i roto i te wai tukanga e whakaeke ana i te hanganga waro.

Ngā konganuku me ngā koranu ātete waikura

Me ātete ngā wāhanga whakarewa o te hiri, tae atu ki te pereti repe, te ringaringa, me ngā puna, ki te waikura ōrite me ngā whakaeke ā-rohe pērā i te pakaru me te pakaru waikura ahotea (SCC). Ahakoa ko te maitai kore waikura 316 te paerewa ahumahi mō te ratonga whānui, he tino ngāwari ki te pakaru i puta mai i te hauota. Mō ngā taiao kaha, me tohu e ngā miihini ngā koranu kounga teitei ake i runga i tā rātou Tau Ātete Pitting (PREN). Ko te PREN neke atu i te 40 te tikanga e hiahiatia ana mō te ratonga hauota nui, waikawa rānei.

Ko te Hastelloy C-276 (PREN > 45) tētahi o ngā konukōre nickel-molybdenum-chromium tino maha ngā whakamahinga, e tuku ana i te ātete tino pai ki te hau chlorine mākū, ngā hypochlorite, me te whānuitanga o ngā waikawa waro me ngā waikawa kore-waro. He maha ngā wā ka tīpakohia te Titanium Grade 2 mō ngā rauemi waikura me ngā tono wai moana nā tōna kiriata waikura pumau, tiaki, ahakoa he ngoikore ki te chlorine maroke. Ko te konukōre 20 tētahi atu whiringa noa, i hangaia kia ātete ki te whakaekenga o te waikawa whanariki i ngā pāmahana me ngā kukū teitei.

Ngā elastomers me ngā huānga hiri tuarua

Ko ngā huānga hiri tuarua, ko ngā mowhiti-O te nuinga, e whakarato ana i te hiri pumau i waenganui i te huihuinga hiri miihini me te anga papu. Ko te kōwhiringa elastomer te mea e whakawhāiti ana i te mahi matū me te wera o te hiri. Ko ngā Fluoroelastomers (FKM), e mōhiotia whānuitia ana ko te ingoa waitohu Viton, he paerewa mō te maha o ngā waikawa ngawari me ngā wai hinu engari ka tere te pirau i roto i ngā ketone, ngā amine, me ngā kawakore kaha.

Mō te ātete nui ki te waikura, me whakamahi ngā perfluoroelastomers (FFKM), pērā i a Kalrez, Chemraz rānei. He rite tonu te ātete matū o ngā matū FFKM ki te PTFE engari ka mau tonu te mahara rapa e tika ana mō te hiri hihiri. Ka taea e rātou te tu atu ki ngā whakarewa kaha, ngā waikawa kaha, me ngā turanga i ngā pāmahana mahi tonu tae atu ki te 327°C (620°F). Ina aukatia te whakamahinga o te FFKM katoa e ngā here tahua, ka whakaratohia e ngā mowhiti O-FKM, O-ringi silicone rānei kua whakauruhia ki te PTFE he huarahi utu-pai, e tuku ana i te koretake matū o te koti PTFE me te manawanui miihini o te matua elastomer.

Me pēhea te aromatawai i ngā rauemi hiri mō ngā āhuatanga ratonga

Ko te aromatawai i ngā rauemi hiri me neke atu i ngā tūtohi hototahi matū taketake, me te tātari i ngā āhuatanga hihiri o te taiao mahi. Ko te rauemi e kore e mahi matū i te pāmahana rūma ka tere te pirau ina pāngia e te wera waku i puta mai i ngā mata hiri, ina rerekē rānei ngā kukū wai i te wā e pakaru ana te tukanga. Me aromatawai ngā miihini i te katoa o te anga thermodynamic me te matū o te tono.

Ngā taurangi whakahaere pēnei i te kukū, te hauota, me te pāmahana

Ka tino whakarerekē te pāmahana, te kukū, me te aroaro o ngā katote motuhake i ngā tere waikura. Hei tauira, he tino pai te maitai kore waikura 316 mō te wai pāmahana taiao, engari ki te neke atu ngā kukū o te hauota i te 1000 ppm, ā, ka piki ake te pāmahana i runga ake i te 60°C (140°F), ka tino ngāwari te rauemi ki te pakaru waikura ahotea (SCC) me te pakaru tere. Nō reira, ko ngā tono e pā ana ki te tote wera, ki te wai moana rānei, he maha ngā wā e hiahiatia ana he maitai kore waikura super duplex, he titanium rānei.

He mea nui anō hoki te kukū waikawa. He āhua waikura kore-rārangi te waikawa whanariki: he tino waikura te waikawa whanariki memeha ki te maha o ngā konganuku, me whakamahi te Hastelloy, te Alloy 20 rānei, engari ko te waikawa whanariki kukū (>90%) ka taea te whakahaere i ētahi wā e ngā maitai waro paerewa i ngā pāmahana taiao nā te hanganga o te kiriata whanariki kore e uru. Heoi, ki te mimiti te waikawa kukū i te makuku mai i te hau, ka tīmata tonu te waikura nui ki te taputapu hiri i te waikura ā-rohe.

Ngā tauwhitinga rauemi me ngā āhuatanga whakataurite

Ko te whiriwhiri i te rauemi tino pai he maha tonu te whakataurite i ngā āhuatanga miihini me ngā āhuatanga matū e whakataetae ana. Ahakoa he ātete koretake te ātete o te silicon carbide kua whakatōkia ki te alpha, he tino pakarukaru. Mena ka pāngia te papu e te cavitation nui, te piko rānei o te pou, ka pakaru kino ngā mata SiC. I roto i ngā tono e aro nui ana te ru miihini me te waikura, ka taea e ngā kaihangarau te whakaiti i te kaha mā te whakamahi i tētahi mata tungsten carbide he pakari ake, ahakoa he iti ake te koretake o te matū.

Ko te kawe wera tētahi atu āhuatanga whakataurite nui. Ka puta he wera nui i ngā mata hiri, me horapa ki roto i te wai tukanga kia kore ai e mura te wai hei kohu. He pai rawa te kawe wera o te SiC, ka tere ake te kukume i te wera mai i te atanga hiri i te uku alumina, i te waro rānei. Ka whakaitihia e tēnei āheinga te mōrearea o te ru wera, ā, ka roa ake te ora o ngā elastomers tuarua.

Ina kore e ranea te whakahou rauemi kotahi

I ētahi tono tino nui, kāore e ranea te whakapai ake i te whakarewa me ngā rauemi mata o te hiri miihini kotahi hei whakapūmau i te pono. Ina he tino morearea, he paitini, he ngāwari rānei te whakapūmau i te wai ina pā atu ki te hāora hau, me whai i tētahiwhakaritenga hiri miihini takiruaE rua ngā huinga mata hiri e whakamahia ana e ngā hiri takirua, ā, ka whakauruhia he arai, he wai ārai rānei ki waenganui i a rāua.

I raro i ngā mahere paipa paerewa a te American Petroleum Institute (API), pērā i te Mahere API 53A, 54 rānei, ka tohatohahia he wai ārai pēhanga i waenganui i ngā hiri o roto me waho o te waka. Ka puritia tēnei wai i te pēhanga tata ki te 10% ki te 15% (te tikanga 1.5 ki te 2.0 pae) teitei ake i te pēhanga o te pouaka whakakī papu. Nā te mea he teitei ake te pēhanga o te wai ārai, ka rere tetahi turuturu puta noa i te hiri o roto ki roto i te tukanga, kia kore ai te wai tukanga waikura e pā ki ngā wāhanga hiri o waho, e mawhiti rānei ki te āhuarangi. Mā tēnei rautaki ka taea te hanga i ngā taputapu hiri o waho mai i ngā rauemi paerewa, iti ake te utu.

Ngā Take Hoko me te Whakatutuki i te Tikanga i roto i te Kōwhiringa Rauemi

Ko te hoko hiri ā-ringa ātete-waikura ko te whakatere i ngā mekameka tuku uaua, te whakahaere i ngā wā arahi roa mō ngā rauemi tauhou, me te whakarite kia piri pono ki ngā paerewa hanganga ahumahi. Mēnā kāore e tuhia tika, e manatokohia rānei ngā hanganga rauemi, ka arahi pea ki ngā hapa nui me ngā herenga ture nui, inā koa i roto i ngā rāngai e tino whakahaeretia ana pērā ihinu me te hau, ngā rongoā, me te tukatuka matū.

Ngā paerewa, ngā tuhinga, me te whai i ngā mea e tika ana

Ko ngā tono mōrearea nui me whai tuhinga pakari hei manatoko i whakamahia ngā rauemi kua tohua i roto i te hanganga o te hiri. I roto i te umanga matū hinu, me tutuki tonu ngā hiri miihini ki ngā paerewa API 682 Putanga 4, e whakatau ana i ngā kāwai rauemi motuhake mō ngā āhuatanga ratonga rerekē. Mō ngā tono e whai wāhi ana ki te hauwai whanariki (H2S), me tutuki ngā wāhanga whakarewa ki te NACE MR0175 / ISO 15156 hei ārai i te pakaru o te ahotea whanariki.

Hei whakapūmau i te whai i ngā mea e hiahiatia ana e ngā miihini hoko he Pūrongo Whakamātautau Rauemi (MTR) mō ngā wāhanga whakarewa katoa kua mākū. Hei tāpiri, ka taea e ngā whare te whakahaere i te whakamātautau Tautuhi Rauemi Pai (PMI) i te whiwhinga o te hiri. Ka whakamahia e te PMI ngā tātaritanga hihi-X fluorescence (XRF) hei whakaū i te hanganga huānga o ngā koranu, kia kore ai e whakangaromia e te kaiwhakarato te whakakapinga kore-waikura 304 mō te Hastelloy C-276 i tonoa.

Te kaha o te kaiwhakarato me ngā mōrearea o te kimi rauemi

He mōrearea anō hoki kei te tiki mai i ngā koranu tauhou me ngā elastomer mahi-tiketike.

Me pēhea te whiriwhiri i te huinga rauemi pai rawa atu

Ngā Whakaaro Matua

• Ko ngā whakatau tino nui me te take mō te hiri ā-ringa ātete waikura
• Ngā whakaritenga, ngā whakaritenga, me ngā arowhai mōrearea e tika ana kia whakamanahia i mua i tō whakaae
• Ngā mahi whai muri me ngā whakatūpato ka taea e ngā kaipānui te tono tonu

Ngā Pātai Auau

Ko tēhea rauemi mata hiri te mea pai rawa atu mō te hiri ā-ringa ātete ki te waikura?

Ko te silicon carbide kua whakakāhia ki te alpha te mea pai rawa atu mō ngā āhuatanga katoa, nā te mea he pai ake te tu atu ki ngā waikawa, ki ngā kawakore, me ngā pāmahana teitei i ngā mata waro paerewa.

Āhea me karohia ngā mata tungsten carbide, waro rānei?

Āta karohia te waro paerewa i roto i ngā wai whakapūkara kaha, i ngā wai tino waikura rānei. Kia tūpato ki te waro tungsten ina taea te whakaeke matū; tirohia te hototahitanga o te wai i mua i te kōwhiringa.

He rite tonu te ātete o ngā mata hiri silicon carbide katoa ki te waikura?

Kāo. Ko te SiC kua whakakāhia ki te alpha he pai ake te ātete matū i te SiC kua honoa ki te tauhohenga, inā koa i roto i ngā matū kaha me ētahi ratonga matū kaha.

Haunga ngā mata, he aha atu ngā wāhanga hiri me ātete ki te waikura?

Tirohia hoki ngā wāhanga whakarewa me ngā elastomers. Me ōrite ngā puna, ngā repe, me ngā mowhiti-O ki te wai tukanga, te pāmahana, me te pēhanga, ki te kore ka pakaru te hiri ahakoa he mata kounga teitei.

Ka taea e Victor Seals te āwhina i te whakataurite i ngā hiri ātete waikura ki ngā tauira papu OEM?

Āe. Ka whakarato a Victor Seals i ngā hiri miihini hototahi-OEM me ngā hiri whakakapinga mō te maha o ngā waitohu papu ahumahi, hei āwhina i ngā tīma tiaki ki te whiriwhiri i ngā rauemi e tika ana mō ngā mahi waikura.