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Ukukhetha Ukuthwala Okulula Nokusebenza Kahle: Ukuhlaziywa Okuphelele Kwezinto Zobunjiniyela Bezingodo Zepulasitiki

 

Ekugingqikeni kwesimanjeibhereumklamo, ikheji liyisici esibalulekile, futhi ukukhethwa kwezinto kuthinta ngqo ukusebenza kwebhere, isikhathi sokuphila, kanye nezinhlelo zokusebenza ezifanele. Uma kuqhathaniswa nezinto zensimbi zendabuko, amakheji epulasitiki obunjiniyela aqala ukuvelela kancane kancane emikhakheni eyahlukene yezimboni ngenxa yezakhiwo zawo ezihlukile zomzimba nezamakhemikhali.

 

Lesi sihloko sigxile kumapulasitiki obunjiniyela ajwayelekile njengeinayiloni (PA), i-polyoxymethylene (POM), kanye ne-polyimide (PI), behlaziya ngokujulile izinzuzo zabo zokusebenza kanye nemingcele esebenzayo ekusetshenzisweni kwekheji.

 

Ukuqhathanisa Ukusebenza Kokusebenza Kwezinto Eziyinhloko

 

Inayiloni (PA)

 

Ngenxa yokuqina kwayo okuhle kakhulu, ukuzigcoba, kanye nezinzuzo zezindleko, i-nylon isetshenziswa kabanzi kuma-bearings asebenza ngaphansi kwemithwalo ephakathi nendawo kanye namazinga okushisa aphakathi nendawo. I-coefficient yayo ephansi yokungqubuzana isiza ukunciphisa umsindo wokusebenza, okwenza ifaneleke kakhulu ezintweni zasekhaya kanye nemishini yehhovisi edinga amazinga aphezulu okuthula. Ngokusho kwe-Rolling Bearing Application Handbook, i-PA66 inokushisa okuqhubekayo kokusebenza okufika ku-120°C futhi ingamelana namazinga okushisa esikhashana afika ku-150°C. Inani layo le-PV (ingcindezi × ijubane) licishe libe ngu-50 MPa·m/s, okwenza ifaneleke ukusebenza ngesivinini esiphakathi nendawo.

 

I-Polyoxymethylene (i-POM)

 

I-POM yaziwa ngokuqina kwayo okuphezulu, ukukhukhuleka okuphansi, kanye nokuqina okuhle kakhulu. Ubuso bayo obubushelelezi kanye nokumelana kwayo nokuguguleka okuphezulu kwe-nylon kuyenza ifanelekele amakheji okuthwala imithwalo ezindaweni ezisebenzisa izinsimbi ezisheshayo, ezilula, noma ezinembile. I-POM inobubanzi bokushisa obusebenzayo obusukela ku--40°C kuya ku-100°C, kanye nokusebenza kwesikhashana okufika ku-120°C. Inani layo le-PV lingafinyelela ku-60 MPa·m/s, okwenza kube ukukhetha okuhle kakhulu kwama-motor anesivinini esikhulu kanye nezinhlelo ze-wiper zezimoto.

 

I-Polyimide (PI)

 

Njengommeleli wepulasitiki yobunjiniyela esebenza kahle kakhulu, i-PI inikeza ukumelana okuhle kakhulu nokushisa okuphezulu (kufika ku-260°C ukuze isetshenziswe isikhathi eside) ngenkathi igcina amandla amahle okusebenza kanye nokumelana nemisebe. Inani layo le-PV lingadlula i-100 MPa·m/s, okwenza ifaneleke ezindaweni ezibucayi njengezindiza, ama-motor anokushisa okuphezulu, kanye nezinhlelo zokuthwala emishinini ye-vacuum. Naphezu kwezindleko zayo eziphakeme, ayinakushintshwa ezimweni zokusebenza ezikhethekile.

 

Izinzuzo Eziphelele Zamakheji Epulasitiki Obunjiniyela

 

Ilula: Njengoba insimbi incane kakhulu, ipulasitiki inciphisa kakhulu isisindo sokuthwala, yehlisa i-inertia, futhi ithuthukisa impendulo enamandla.

 

Ukusebenza Komsindo Ophansi: Amapulasitiki ane-modulus enwebekayo ephansi, emunca ngempumelelo ukudlidliza ukuze kusebenze ngokuthula.

 

Izakhiwo Zokuzigcoba: Iningi lamapulasitiki obunjiniyela ligcotshwa ngaphakathi, okunciphisa ukuthembela ekugcobeni kwangaphandle futhi kwandise izikhawu zokulungisa.

 

Ukumelana Nokugqwala: Zimelana namanzi, uwoyela, kanye nezinhlobo ezahlukene zamakhemikhali, zilungele ukusetshenziswa ezindaweni ezinomswakama noma ezigqwalisayo.

 

Izincomo Zokukhetha kanye Nezindinganiso

 

Ngokwezinga le-JB/T 7048, ukukhethwa kwamakheji epulasitiki kudinga ukucatshangelwa okubanzi komthwalo, isivinini, izinga lokushisa, kanye nezici zemvelo. I-POM ikhethwa kakhulu ekusetshenzisweni kwesivinini esikhulu, umsindo ophansi; i-PA iyindlela yokusebenza okulingene; kanti i-PI inconywa emazingeni okushisa aphezulu kakhulu noma izidingo zokuthembeka okuphezulu.

 

Amakheji epulasitiki obunjiniyela awagcini nje ngokuthatha indawo yensimbi; kunalokho, alungiselelwe ukusebenza kahle ezicelweni ezithile. Ngokukhetha izinto zesayensi, ukusebenza kahle, ukuthula, kanye nokuphila kungathuthukiswa ngokuphelele ngenkathi kugcinwa ukuthembeka kwamabhereyi. Ngokuthuthuka kobuchwepheshe bezinto, imingcele yokusetshenziswa kwamapulasitiki asebenza kahle kumabhereyi izoqhubeka nokukhula.