Ho iphetola ha lintho tsa Tiiso
Phetoho ea thepa ea tiiso e ile ea iphetola ha litiiso li tobane le litlhoko tse thata haholoanyane.Litlhoko tsa pele li ne li ka khotsofatsoa ka ho sebelisa hemp e pakiloeng kapa letlalo, empa ha litlhoko li ntse li eketseha, ho ile ha batloa lisebelisoa tse ncha.Sena se ile sa lebisa ho kenyelletsoeng ha litiiso tsa rabara tsa tlhaho, tse ileng tsa fetoha li-elastomer tsa maiketsetso, 'me qetellong li-polymers tsa boenjiniere tse kang PTFE (Polytetrafluoroethylene).
Likhetho tse 'ne tse atileng haholo tsa sejoale-joale bakeng sa melomo ea rotary shaft seal ke rabara ea nitrile, polyacrylate, FKM, le PTFE.Har'a lisebelisoa tsena, tse tharo ke li-elastomers - rabara ea nitrile, rabara ea polyacrylate le FKM - 'me e le' ngoe feela ke polymer - PTFE.A re bone hore na thepa ena e bokellana joang.
Boitsebiso ba 1: Rabara ea Nitrile
Rabara ea Nitrile e tsamaea ka mabitso a 'maloa, ho kenyelletsa rabara ea acrylonitrile butadiene, Buna-N, le NBR.Ha e le hantle ke rabara ea maiketsetso elastomer e hanyetsanang haholo le lik'hemik'hale tse ling tsa bohlokoa joalo ka oli, mafura le libeso.Ha e bapisoa le li-elastomer tse ling, e etsa mosebetsi o tsoileng matsoho oa ho hanela ho senyeha le ho pepesehela letsatsi le boemo ba leholimo.Leha ho le joalo, e na le meeli.
Boitsebiso ba 2: Rabara ea Polyacrylate
Polyacrylate e bolela rabara ea polyacrylate 'me ka linako tse ling e bitsoa ACM.E fana ka ho hanyetsa mocheso hantle 'me e lumellana le lebelo le phahameng la shaft ho feta rabara ea nitrile.E boetse e ntle haholo lits'ebetsong tse ling tse ikhethileng joalo ka mafura a kenyelletsang sebabole.Matla a eona a fokolang le ho hanyetsa metsi ke litšobotsi tsa eona tse ka sehloohong tse fokotsang.
Boitsebiso 3: FKM (Fluoroelastomers)
Taba e khahlisang ke ena: hangata batho ba ferekana ka phapang lipakeng tsa FKM, FPM, le Viton.Kaofela li bua ka thepa e tšoanang ea motheo.Lebitso FKM le fumana metso ea lona ho lihlopha tsa ASTM tsa flouroelastomers, ha FPM e le khutsufatso ea DIN/ISO.Viton ke lebitso la eona la khoebo, la DuPont.Thepa ea FKM e phahame haholo ho feta ea rabara ea nitrile kapa rabara ea polyacrylate, ka bobeli ho latela mocheso le lebelo la shaft, empa hape le khanyetso ea lik'hemik'hale.E boetse e theko e boima ka ho fetisisa ho li-elastomer tse tharo tseo ho buisanoeng ka tsona ho fihlela joale.
Ntho ea 4: PTFE (Polytetrafluoroethylene)
PTFE e tsebahala haholo ka lebitso la eona la khoebo, polymer (hape ke ea DuPont).PTFE e feta hole ts'ebetso ea rabara ea nitrile, rabara ea polyacrylate, le FKM mabapi le lebelo la shaft, mocheso le khanyetso ea lik'hemik'hale.Ebile, is e na le khanyetso e ntle ka ho fetisisa ea lik'hemik'hale ea polymer kapa elastomer efe kapa efe hammoho le coefficient e tlase ea likhohlano.
Qetello
Chate e ka tlase e bontša kamoo lisebelisoa tsena tse 'nè tse tloaelehileng tsa tiiso li kopanang kateng ho latela mefokolo ea tsona ea lebelo la shaft.PTFE e feta tse ling kaofela, leha e le ka lebelo la shaft le fetang 30,000 rpm.Ha u khetha tiiso e hlokang ho phela tikolohong e senyang le e phephetsang ka lebelo le phahameng, se shebe hole ho feta PTFE.
Nako ea poso: May-08-2018