I-China Talc powder yokuvelisa itywina yerabha ukuze yonyuse ukubuyiselwa kwe-elastic kunye nokuphucula ukumelana nokuguguleka ngelixa inciphisa iseti yoxinzelelo kwaye iphucula ukuthembeka kwetywina kwizicelo zoxinzelelo oluphezulu umzi-mveliso kunye nababoneleli

Umgubo weTalc wokuvelisa isitywino serabha ukuze womeleze ukubuyiselwa kwe-elastic kunye nokuphucula ukumelana nokuguguleka ngelixa kunciphisa iseti yoxinzelelo kunye nokuphucula ukuthembeka kwesitywino kwizicelo zoxinzelelo oluphezulu Umfanekiso obonisiweyo

Umgubo weTalc wokuvelisa isitywina serabha ukuze womeleze ukubuyiselwa kwe-elastic kunye nokuphucula ukumelana nokuguguleka ngelixa unciphisa iseti yoxinzelelo kunye nokuphucula ukuthembeka kwesitywina kwizicelo zoxinzelelo oluphezulu

Inkcazo emfutshane:

Umgubo weTalc, iminerali eguquguqukayo neyimfuneko, idlala indima ebalulekileyo ekuvelisweni kweetywina zerabha, iguqula ishishini ngeempawu zayo ezimangalisayo. Kwicandelo leetywina zorhwebo, apho ukuthembeka nokuqina kubaluleke kakhulu, umgubo weTalc uvela njengotshintsho olukhulu, unikezela ngeenzuzo ezininzi eziphucula ukusebenza kunye nobude bexesha leetywina zerabha.

Enye yezona nzuzo ziphambili ze-talc powder kwimveliso yerabha seal kukukwazi kwayo okungenakuthelekiswa nanto ukuphucula ukubuyiswa kwe-elastic. Kwiimveliso zoshishino, izitywini ziphantsi koxinzelelo oluqhubekayo loomatshini, kubandakanya ukucinezelwa okuphindaphindiweyo, ukolulwa, kunye nokugoba. Umzekelo, ii-gaskets zomnyango kwizakhiwo zorhwebo zihlala zivulwa kwaye zivalwa rhoqo, ngelixa izitywini zeenjini zeemoto zifumana ukuguquguquka koxinzelelo oluguquguqukayo ngexesha lokusebenza. Ulwakhiwo oluhle, lwe-lamellar lwe-talc powder lubalulekile ekusombululeni le mingeni. Kwinqanaba le-microscopic, iiplatelets ze-talc zidibana nee-polymers zerabha, zenze inethiwekhi esebenza njengesipringi sangaphakathi. Olu nxibelelwano lukhethekileyo luvumela izitywini ukuba ziphinde zifumane imo yazo yokuqala ngokukhawuleza emva kokucinezelwa, ziqinisekisa ukulingana okuqinileyo nasemva kwamawaka eemijikelo.

Kuphando lwakutshanje oluphucukileyo lwelabhoratri, kuye kwasetyenziswa iindlela zokwenza imifanekiso ngesantya esiphezulu ukuze kubanjwe amandla antsonkothileyo ale nkqubo. Ezi mifanekiso zibonisa ngokucacileyo indlela iiplatelets ze-talc ezityibilika ngayo kwaye ziphinde zijike ngaphakathi kwe-matrix yerabha ngexesha lokuguqulwa, oku kwenza kube lula ukubuyiselwa kwe-elastic. Ngaphezu koko, izifundo ezibanzi ziye zathelekisa izitywina ezenziwe ngamanqanaba ahlukeneyo e-talc powder, zityhila ukuba ubunyulu obuphezulu kunye namasuntswana e-talc anobukhulu obufanayo zikhokelela ekuphuculeni ukubuyiselwa kwe-elastic okukhulu. Ngokukodwa, izitywina ezenziwe nge-ultrafine, i-high-purity talc powder zibonise ukunyuka kokubuyiselwa kwe-elastic ukuya kuthi ga kwi-35%, xa kuthelekiswa nezo zingenayo i-talc okanye i-talc ekumgangatho ophantsi. Olu phuculo lubalulekileyo ekubuyiselweni kwe-elastic luluncedo olubalulekileyo kwizicelo ezifuna ukuthembeka kwexesha elide, njengoko inceda ekuthinteleni ukuvuza kwaye igcina ingqibelelo yenkqubo evaliweyo.

Ukumelana nokuguguleka yenye into ebalulekileyo ekusebenzeni kwezitywini zerabha ezisebenza kakuhle, ngakumbi kwiindawo ezirhabaxa ezifana noomatshini bemigodi, ii-conveyor zoshishino, kunye nezixhobo zokwenza izinto ezinzima. Kule meko inzima, izitywini zihlala zichatshazelwa kukungqubana nokukruquka, okunokukhokelela ekugugulekeni nasekungaphumeleli kwangethuba. Ukwakheka kweplatelet yeTalc powder kunika isiphumo sokuzithambisa, esebenza njengeebheringi ezincinci, ezifakwe ngaphakathi kwi-matrix yerabha. Xa isitywini sidibana nomphezulu wokudibana, iiplatelet zetalc ziyatyibilika zichasene, zinciphisa ubushushu bokungqubana kwaye zinciphise ukungqubana komphezulu.

Ngaphezu koko, izifundo zakutshanje ze-tribological ziye zajonga nzulu kwindlela yokuzithambisa ye-talc kwiitywina zerabha. Ezi zifundo zibonise ukuba ikhemistri yomphezulu we-talc idlala indima ekunciphiseni ukunamathelana phakathi kwetywina kunye nomphezulu wokudibana, nto leyo ephucula ngakumbi isiphumo sokuthambisa. Kwizicelo zehlabathi lokwenyani, uvavanyo lwentsimi luye lwenziwa kwimisebenzi emininzi yemigodi kwihlabathi liphela. Kwindawo enkulu yokwemba ubhedu eMzantsi Melika, umzekelo, iitywina ezifakwe kwi-talc kwiinkqubo zebhanti yokuhambisa zihlala ixesha elide ngama-60% kuneetywina eziqhelekileyo. Olu bomi bude buthetha ukonga okukhulu kwiindleko zokugcina, njengoko kufuneka ukutshintshwa kwetywina okuncinci ngokuhamba kwexesha. Ukongeza, uhlobo lwekhemikhali olungasebenziyo lwe-talc powder luthintela ukuwohloka kwezinto ezingqongileyo ezifana nokufuma, iikhemikhali, kunye nemitha ye-UV, okuqinisekisa ukusebenza rhoqo kuyo yonke impilo yetywina. Kwiindawo zoshishino eziselunxwemeni apho iitywina zivezwa kumanzi anetyuwa kunye nokufuma okuphezulu, iitywina eziguqulwe yi-talc ziye zagcina ukuthembeka kwazo ngcono kakhulu kunezo zingatshintshwanga, zigqamisa amandla okukhusela ale minerali.

Iseti yoxinzelelo yingxaki eqhubekayo kubunjineli botywino ngerabha, ngakumbi kwizicelo apho izitywino zivezwa kuxinzelelo oluhlala ixesha elide. Imizekelo yezicelo ezinjalo ibandakanya ii-gaskets ezinzulu-ezingaphantsi kolwandle, ekufuneka zimelane noxinzelelo olukhulu lobunzulu bolwandle, kunye nezitywino zeenqwelo-moya eziphakamileyo-eziphantsi, eziphantsi koxinzelelo olwahlukeneyo ngexesha lokubhabha. Umgubo we-talc unciphisa umba woxinzelelo olubekwe ngendlela ephindwe kabini. Okokuqala, uqinisa isakhiwo sokudibanisa irabha esinqamlezileyo, uphucula ukumelana kwayo nokuguquguquka phantsi koxinzelelo. Uphando lwakutshanje lwesayensi ye-polymer lusebenzise iindlela eziphambili ze-spectroscopy ukuhlalutya iibhondi zeekhemikhali ngaphakathi kweekhompawundi zerabha ezine-talc powder, okuqinisekisa ukuqina kwee-cross-links. Okwesibini, inika inkxaso ebonakalayo kwiitsheyini ze-polymer, ithintela ukolula okugqithisileyo kunye nokuguquguquka okusisigxina kwesakhiwo sezinto.

Kwiimeko ezinzima kakhulu, njengakwizicelo ze-cryogenic apho amaqondo obushushu anokwehla aye kwi--196°C, indima ye-talc powder iba yinto ebaluleke ngakumbi. Izixhobo zovavanyo ezikhethekileyo zisetyenzisiwe ukulinganisa ezi ndawo zinzima, kwaye iziphumo ziyamangalisa. Ii-seal eziguqulwe yi-talc kwimibhobho ye-cryogenic zigcine izinga lokuthembeka kwe-seal elingaphezulu kwe-98% emva kweeyure ezili-10,000 zokusebenza okuqhubekayo, xa kuthelekiswa ne-85% kwii-seal ezingaguqulwanga. Ngokugcina uzinzo olulinganayo lwe-seal phantsi koxinzelelo olude, i-talc powder iqinisekisa ukuba i-seal igcina ukusebenza kwayo kokutywina ngokuhamba kwexesha. Oku kusebenza okugqwesileyo kwenza ii-seal zerabha eziphuculweyo ze-talc zibe lukhetho olukhethwayo lwezicelo apho ukuthembeka nokhuseleko kungaxoxiswana.

Kwiinkqubo zoxinzelelo oluphezulu, ezifana neesilinda ze-hydraulic, imibhobho yegesi yendalo, kunye nezixhobo zokukhupha ioyile negesi, ukuthembeka kwesitywina kubaluleke kakhulu. Nakuphi na ukungaphumeleli kwesitywina kunokukhokelela kwimiphumo emibi kakhulu, kubandakanya ukuvuza, umonakalo kwizixhobo, kunye neengozi zokusingqongileyo. Umgubo we-talc udlala indima ebalulekileyo ekuqinisekiseni ukuthembeka kwesitywina ngokusebenza njengomsasazi woxinzelelo. I-geometry yayo ye-particle esicaba ivumela ukuba isasaze ngokulinganayo amandla asetyenzisiweyo kumphezulu wesitywina, ithintele uxinano loxinzelelo lwendawo olunokukhokelela ekusileleni kwangaphambili.

Ukulinganisa kwanamhlanje kwe-computational fluid dynamics (CFD) kuye kwaba nzima nangakumbi, kuthathelwa ingqalelo izinto ezifana ne-gradients yobushushu kunye neepateni zokuhamba kolwelo ngaphakathi kwe-seal. Ezi modeli ziphuculweyo zibonise indlela i-particle orientation ekhethekileyo ye-talc ehambelana ngayo ne-pressure vectors, nto leyo eyandisa ngempumelelo umthamo wokuthwala umthwalo we-seal ukuya kuthi ga kwi-40%. Ukongeza, uhlalutyo lwe-finite element (FEA) lusetyenzisiwe ukufunda indlela esebenza ngayo i-seal nge-talc powder phantsi kweemeko ezahlukeneyo zokulayisha. Iingcamango ezidibeneyo ezivela kwi-CFD kunye ne-FEA zibonelele ngokuqonda okubanzi ngakumbi kwendlela i-talc powder ephucula ngayo ukusebenza kwe-seal. Lo mthamo wokuthwala umthwalo ophuculweyo uvumela i-seal ukuba imelane noxinzelelo oluphezulu ngaphandle kokubeka emngciphekweni ukuthembeka kwayo, nto leyo ebalulekileyo ekusebenzeni ngokukhuselekileyo nangokufanelekileyo kweenkqubo zoxinzelelo oluphezulu.

Enye inzuzo ebalulekileyo ye-talc powder kwimveliso ye-rubber seal kukuhambelana kwayo nee-compounds ezahlukeneyo zerabha. Nokuba yi-ethylene propylene diene monomer (EPDM), i-nitrile butadiene rubber (NBR), okanye i-silicone rubber, i-talc powder inokufakwa ngokulula kwi-formulation ukuze kufezekiswe iipropati ezifunwayo. Oku kuguquguquka kuvumela abavelisi ukuba benze ngokwezifiso i-formulation ye-rubber seal ngokusekelwe kwiimfuno ezithile zokusebenza zesicelo.

Umzekelo, kwishishini lokucubungula iikhemikhali, apho izitywini kufuneka zimelane neekhemikhali ezininzi ezirhabaxa, umgubo we-talc ungadityaniswa ne-NBR ukwenza isitywini esinika ukumelana okuhle kweekhemikhali. Uvavanyo lokuntywiliselwa kweekhemikhali elebhu lubonise ukuba izitywini ze-talc-NBR zinokumelana nokuchatshazelwa zii-asidi ezinamandla kunye nee-alkali ixesha elide ngaphandle kokuwohloka okukhulu. Kwishishini leenqwelo-moya, apho kufuneka ukumelana nobushushu obuphezulu, izitywini zerabha ze-silicone eziphuculweyo ze-talc zingasetyenziselwa ukumelana nobushushu obugqithisileyo ukusuka kwi--60°C ukuya kwi-260°C ngaphandle kokulahlekelwa kukusebenza kwazo kokutywina. Enyanisweni, kwiindawo zenjini yejethi, ezi zitywini ziye zabonakaliswa ukuba zigcina ukusebenza kwazo nangona zitshintsha ngokukhawuleza ubushushu, ukuqinisekisa ukusebenza okuthembekileyo kweenjini.

Ukongeza kwiipropati zayo zoomatshini nezekhemikhali, i-talc powder ikwabonelela ngeenzuzo ezininzi zokucubungula kwimveliso ye-rubber seal. Ubungakanani bayo obucolekileyo be-particle kunye neepropati zayo ezibalaseleyo zokusasazwa ziqinisekisa ukusasazwa okufanayo kwi-rubber matrix, nto leyo ebangela umgangatho wemveliso ohambelanayo. Ubuchwepheshe bokuxuba obuphambili, njenge-twin-screw extruders, buphuculwe ukuze busebenzise ngokupheleleyo iimpawu zokusasazwa kwe-talc powder, ukuqinisekisa ukuba yonke inxalenye ye-rubber compound iyazuza kwiipropati zayo. I-talc powder ikwaphucula iipropati zokuhamba kwe-rubber compound ngexesha lokucubungula, okwenza kube lula ukuyibumba nokuyila kwi-seal geometry oyifunayo.

Oku akunciphisi nje ixesha kunye neendleko zemveliso kuphela kodwa kuphucula nokusebenza kakuhle kwenkqubo yokuvelisa. Umzekelo, kwimigca yokuvelisa izitywino ezenzekelayo, ukusetyenziswa kwe-talc powder kuye kwavumela amaxesha okujikeleza akhawulezileyo kwaye imveliso incinci. Ngaphezu koko, ukongezwa kwe-talc powder kunokunciphisa ukusetyenziswa kwamandla kwezixhobo zokucubungula, njengoko kufuneka amandla amancinci ukucubungula irabha enokugeleza ngakumbi.

Ukusetyenziswa komgubo we-talc kwimveliso yetywina yerabha nako kunobuhlobo nokusingqongileyo. I-Talc yiminerali yendalo efumaneka kakhulu kuqweqwe lomhlaba. Ukukhupha kwayo kunye nokucubungula kunempembelelo ephantsi kakhulu kwindalo xa kuthelekiswa nezinto ezenziweyo. Iinkampani zemigodi ziya kwamkela iindlela zokukhupha ezizinzileyo, ezifana nokuphinda kwamahlathi kunye nokubuyisela umhlaba emva kwemisebenzi yemigodi, nto leyo enciphisa ngakumbi umngcipheko wemveliso ye-talc kwindalo. Ngaphezu koko, itywina zerabha eziphuculweyo ze-talc ziphila ixesha elide, zinciphisa ukuphindaphindeka kokutshintshwa kwetywina kwaye zinciphisa ukuveliswa kwenkunkuma.

Kwimbono yezoqoqosho olujikelezayo, izitywini zerabha ezisekelwe kwi-talc ekupheleni kobomi zinokuphinda zisetyenziswe ngempumelelo ngenxa yeempawu zazo ezizinzileyo. Uphando luyaqhubeka nokuphuhlisa iindlela ezintsha zokuphinda zisetyenziswe ezinokukhupha kwaye zisebenzise kwakhona umgubo we-talc kwizitywini ezisetyenzisiweyo, nto leyo ephucula ngakumbi uzinzo lwenkqubo yonke. Oku kwenza izitywini zerabha ezisekelwe kwi-talc zibe lukhetho oluzinzileyo kwizicelo zoshishino, zihambelana nokugxila okukhulayo kwihlabathi liphela kukhuseleko lokusingqongileyo kunye nokugcinwa kwezixhobo.

Ukuqukumbela, i-talc powder sisithako esibalulekileyo ekuvelisweni kwe-raber seals ezisebenza kakuhle. Iimpawu zayo ezikhethekileyo, kubandakanya ukuvuselelwa kwe-elastic okuphuculweyo, ukumelana nokuguguleka, ukumelana ne-compression set, ukusasazwa koxinzelelo, kunye nokuhambelana nee-compounds ezahlukeneyo zerabha, kuyenza ibe yinto exabisekileyo kwishishini le-raber seal. Ngokusebenzisa iingenelo ze-talc powder, abavelisi banokuvelisa i-raber seals ezihlangabezana neemfuno ezingqongqo zezicelo zanamhlanje zoshishino, ukuqinisekisa ukuthembeka, ukuqina, kunye nokhuseleko. Njengoko imfuno ye-raber seals ezisebenza kakuhle iqhubeka ikhula, iqhutywa kukwanda kwamashishini afana namandla avuselelekayo, i-aerospace, kunye ne-oyile negesi, indima ye-talc powder kwishishini imiselwe ukuba ibaluleke ngakumbi kwixesha elizayo. Imizamo yophando oluqhubekayo kunye nophuhliso kulindeleke ukuba ivule ngakumbi amandla e-talc powder, ikhokelele ekudalweni kwezisombululo ze-raber seal eziphambili nezisebenzayo.

Thumela i-imeyile kuthi Khuphela njengePDF

Iinkcukacha zeMveliso

Iithegi zeMveliso

Eyona nto iphambili kwi-talc yi-magnesium silicate equlathe amanzi, enefomula yemolekyuli i-Mg3 [Si4O10] (OH) 2. I-Talc yeyokwinkqubo ye-monoclinic. I-crystal ikwimo yee-pseudo hexagonal okanye rhombic flakes, ezibonwa ngamanye amaxesha. Ihlala yenziwe ibe ziingceba ezixineneyo, ezifana namagqabi, i-radial, kunye ne-fibrous aggregates. Ayinambala icacileyo okanye imhlophe, kodwa ibonakala iluhlaza okotshani, ityheli okotshani, imdaka okotshani, okanye ibomvu okotshani ngenxa yokubakho kokungcola okuncinci; Umphezulu wokuqhekeka ubonisa ukukhanya kweeperile. Ubulukhuni 1, ubunzima obuthile 2.7-2.8.

I-Talc ineempawu ezintle kakhulu zomzimba nezekhemikhali ezifana nokuthambisa, ukunganamatheli, uncedo lokuhamba kwamanzi, ukumelana nomlilo, ukumelana ne-asidi, ukugquma, indawo yokunyibilika ephezulu, iimpawu zeekhemikhali ezingasebenziyo, amandla amahle okugquma, ukuthamba, ukukhanya okuhle, kunye nokufunxwa okunamandla. Ngenxa yesakhiwo sayo sekristale esineengqimba, i-talc ithambekele ekuqhekekeni ngokulula ibe ziingceba kunye nokuthambisa okukhethekileyo. Ukuba umxholo we-Fe2O3 uphezulu, uya kunciphisa ukugquma kwayo.

I-Talc ithambile, inomlinganiselo wobunzima be-Mohs oyi-1-1.5 kunye nemvakalelo yokutyibilika. Ukuqhekeka kwe-{001} kugqibelele kakhulu, kwaye kulula ukuqhekeka kube ziingceba ezincinci. I-engile yokuphumla yendalo incinci (35 ° ~ 40 °), kwaye ayizinzanga kakhulu. Ilitye elijikelezileyo liyi-silicified kwaye lityibilika yi-magnesite, i-magnesite, i-lean ore, okanye i-dolomite marble. Ngaphandle kwamatye ambalwa azinzileyo, ngokubanzi azinzile, anamalungu aphuhlileyo kunye nokuqhekeka. Iimpawu zomzimba neze-mechanical ze-ore kunye nelitye elijikelezileyo zinempembelelo enkulu kwinkqubo yokwemba.

Ibanga leekhemikhali
Ukusetyenziswa: Isetyenziswa njengesizalisi sokuqinisa nokuguqula izinto kwimizi-mveliso yeekhemikhali efana nerabha, iplastiki, ipeyinti, njl. Iimpawu: Yonyusa uzinzo lwemilo yemveliso, yonyusa amandla okutsalwa, amandla okucheba, amandla okujika, amandla oxinzelelo, yokunciphisa ukuguquka, ukunwebeka, i-thermal expansion coefficient, ubumhlophe obuphezulu, kunye nokulingana okuqinileyo kobukhulu bezinto kunye nokusasazeka.

Ibanga le-ceramic
Ukusetyenziswa: Isetyenziselwa ukuvelisa iiseramikhi ezisebenzisa i-high-frequency, iiseramikhi ezingenazingcingo, iiseramikhi ezahlukeneyo zemizi-mveliso, iiseramikhi zokwakha, iiseramikhi zemihla ngemihla, kunye neeglaze zeseramikhi. Iimpawu: Ubushushu obuphezulu abutshintshi umbala, ubumhlophe obuphuculweyo emva kokubumba, uxinano olufanayo, ukukhanya okuhle, kunye nomphezulu ogudileyo

Ibanga lokuhombisa
Injongo: Sisithako sokugcwalisa esisemgangathweni ophezulu kwishishini lezinto zokuthambisa. Iimpawu: Siqulethe isixa esikhulu se-silicon element. Sinomsebenzi wokuthintela imisebe ye-infrared, ngaloo ndlela siphucula ukusebenza kwe-sunscreen kunye nokumelana ne-infrared kwezinto zokuthambisa.

Inqanaba lezonyango kunye nokutya
Ukusetyenziswa: Isetyenziswa njengesongezelelo kwimizi-mveliso yamayeza nokutya. Iimpawu: Ayinatyhefu, ayinavumba, imhlophe kakhulu, iyahambelana kakuhle, ikhazimla kakhulu, incasa ethambileyo, kwaye ithambile kakhulu. Ixabiso le-pH eliyi-7-9 alizithobi iimpawu zemveliso yokuqala.

Ibanga lephepha
Injongo: Isetyenziselwa iimveliso ezahlukeneyo zoshishino lwephepha ezikumgangatho ophezulu neziphantsi. Iimpawu: Umgubo wephepha uneempawu zokuba mhlophe kakhulu, ubungakanani obuzinzileyo beesuntswana, kunye nokungagugi kakhulu. Iphepha elenziwe ngale powder linokwenza kube lula, kube mnandi, ligcine izinto eziluhlaza, kwaye liphucule ubomi benkonzo ye-resin mesh.

Umgubo weBrucite
Ukusetyenziswa: Isetyenziselwa ukwenza i-porcelain yombane, i-porcelain yombane engenazingcingo, ii-ceramics ezahlukeneyo zemizi-mveliso, ii-ceramics zokwakha, ii-ceramics zemihla ngemihla, kunye ne-ceramic glaze. Iimpawu: Ubushushu obuphezulu abutshintshi umbala, ubumhlophe obuphuculweyo emva kokubumba, uxinano olufanayo, ukukhanya okuhle, kunye nomphezulu ogudileyo.