Li-valve tse sebelisoang hangata tse se nang tšepe li hlahloba mokhoa oa ho hokahanya pakeng tsa motlakase oa motlakase le valve ka 'ngoe
Ethylene propylene setulo sa rabara ea setulo se lekantsoeng mocheso ke -28 ¡æ~120¡æ. EPDM e emetse terpolymer of ethylene, propylene, and diene, eo hangata e bitsoang EPT Nordell. Khanyetso e ntle ea ozone le khanyetso ea boemo ba leholimo, ts'ebetso e ntle ea ho kenya motlakase, ho hanyetsa hantle li-polar capacitor le media inorganic. Ka hona, e ka sebelisoa indastering ea HVAC, metsi, phosphate ester, joala, ethylene glycol, joalo-joalo LItulo tsa rabara tsa Ethylene propylene HA LI SEBELETSOE HO SEBELISA HYDROCARBON organic solvents LE OILS, chlorinaTED HYDROCARBONS, turpentINE, kapa OIL tse ling tsa petroleum.
Li-valve tse sebelisoang hangata ka lisebelisoa tse se nang tšepe
Lumela, rabara ea nitrile
Setulo sa rabara sa Nitrile se lekantsoeng ka mocheso oa mocheso ke -18 ¡ã C ho ea ho 100 ¡ã C. E boetse e bitsoa, NITRILE, kapa HYCAR. Ke lisebelisoa tsa rabara tsa bokahohleng tse loketseng metsi, khase, oli le grease, peterole (ntle le peterole e nang le li-additives), joala le ethylene glycol, khase ea oli ea liquefied, propane le butane, oli ea mafura le mecha e meng e mengata. E boetse e na le khanyetso e ntle ea ho apara le ho hanyetsa deformation. Boemo ba lijo (FG) setulo sa rabara sa nitrile se lekantsoeng ka mocheso ke -18¡æ ho ea ho 82¡æ. Sebopeho sa eona se lumellana le CFR Standard Part 21, Karolo ea 177.2600. E ka sebelisoa ka mokhoa o ts'oanang le rabara e tloaelehileng ea nitrile empa e hloka tumello ea FDA.
Ethylene propylene rabara EPDM
Ethylene propylene rabara setulo rated mocheso mefuta e fapaneng ke -28¡æ~120¡æ. EPDM e emetse terpolymer of ethylene, propylene, and diene, eo hangata e bitsoang EPT Nordell. Khanyetso e ntle ea ozone le khanyetso ea boemo ba leholimo, ts'ebetso e ntle ea ho kenya motlakase, ho hanyetsa hantle li-polar capacitor le media inorganic. Ka hona, e ka sebelisoa indastering ea HVAC, metsi, phosphate ester, joala, ethylene glycol, joalo-joalo LItulo tsa rabara tsa Ethylene propylene HA LI SEBELETSOE HO SEBELISA HYDROCARBON organic solvents LE OILS, chlorinaTED HYDROCARBONS, turpentINE, kapa OIL tse ling tsa petroleum.
Mokhahlelo oa lijo ethylene propylene rabara setulo rated mocheso mefuta e fapaneng ke -28¡æ~120¡æ. Sebopeho sa eona se lumellana le CFR Standard Part 21, Karolo ea 177.2600. E ka sebelisoa ka mokhoa o ts'oanang le rabara e tloaelehileng ea nitrile empa e hloka tumello ea FDA.
PTFE PTFE
Setulo sa Teflon se lekantsoeng ka mocheso oa mocheso ke -32 ¡ã C ho ea ho 200 ¡ã C. Ho hanyetsa ka mokhoa o babatsehang mocheso o phahameng le ho bola ha lik'hemik'hale. Ka lebaka la bongata bo phahameng ba polytetrafluoroethylene, ho kenella ka mokhoa o babatsehang, empa hape ho ka thibela ho bola ha mecha ea litaba ea lik'hemik'hale.
Conductive TEFLON KE TEFLON e fetotsoeng sehlahisoa se lumellang hore hona joale ho fete ka har'a lesela ho TLOSA TLHOKOMELISO EA TEfloN. Ka lebaka la conductivity ea eona, conductive polytetrafluoroethylene e ke ke ea lekoa ka spark ea motlakase.
RTFE e matlafalitsoeng ea polyteflon
RTFE ke phetoho ea thepa ea PTFE. Leha khohlano coefficient ea pure PTFE e tlase haholo (0.02 ~ 0.04), empa moaparo o motle, 'me ka lebaka la ho thella habonolo, thepa e mpe ea mochini, matla a tlase, botsitso bo bobe le litšoaneleho tse ling, joalo ka ha thepa ea likhohlano e na le matla a maholo. mefokolo. Phetoho feela, ka mokhoa oa ho kopanya lintho tse bonahalang ho finyella litlhoko tse khethehileng tsa lisebelisoa tsa ho tiisa tse sa sebetseng likarolong tsohle tsa bophelo, ho ntlafatsa ho hanyetsa ha PTFE, ho ka kopanngoa le lintho tse ling tse sa tsitsang tse kang khalase ea fiber, carbon fiber. , graphite, molybdenum disulfide, phofo ea boronse le metsoako e meng ea lintho tse phelang, Linonyello tsa marang-rang li thehoa mohahong oa PTFE oa layered ho ntlafatsa ho satalla, conductivity ea mocheso, khanyetso ea creep, le ho apara ho hanyetsa.
Viton rabara ea fluorine
Mocheso o lekantsoeng oa setulo sa rabara sa fluorine ke -18¡æ~150¡æ. Viton ke letshwao la kgwebo le ngodisitsweng la DuPont Company, mme Fluorel ke letshwao la kgwebo le ngodisitsweng le lekanang le rabara ya fluorine ya 3M Company. Boitsebiso bona bo na le khanyetso e phahameng ea mocheso le khanyetso e ntle ea lik'hemik'hale tsa corrosion. E loketse lihlahisoa tsa hydrocarbon, khatello e tlase le khatello e phahameng ea liminerale acids, empa eseng mecheng ea mouoane le metsi (ho hanyetsa metsi a fokolang).
UHMWPE e phahameng ea boima ba molek'hule ea polyethylene
Litulo tsa polyethylene tse nang le limolek'hule tse phahameng li lekantsoe ho tloha ho -32 ¡ã C ho ea ho 88 ¡ã C. Boitsebiso bona bo na le ho hanyetsa mocheso o tlaase ho feta PTFE, empa ho ntse ho e-na le lik'hemik'hale tse ntle haholo tsa lik'hemik'hale. Uhmwpe e boetse e na le khanyetso e ntle ea ho apara le ho hanyetsa ho bola, 'me e ka sebelisoa maemong a phahameng a ho hanyetsa.
Silicone rabara ea koporo Silicone
Rabara ea silicone ea koporo ke polima e nang le lihlopha tse phelang, tseo ketane ea tsona e ka sehloohong e entsoeng ka silicon le liathomo tsa oksijene. Mocheso o lekantsoeng o tloha ho -100 ¡ã C ho ea ho 300 ¡ã C. E na le mocheso o motle oa ho hanyetsa mocheso le mocheso o thibelang mocheso, ts'ebetso e babatsehang ea ho kenya motlakase le lik'hemik'hale tse kholo tsa lik'hemik'hale. E loketse acid e manyolo le khatello e tlase ea asiti ea inorganic, hlapolla alkali le alkali e kopaneng. Mefokolo: matla a tlaase a mochine. Kalafo ea post vulcanization ea hlokahala.
Graphite ea graphite
Graphite ke kristale ea k'habone, ke lintho tse se nang tšepe, 'mala o moputsoa oa silevera, boleng bo bonolo, bo nang le khanya ea tšepe. Mohs hardness ke 1 ~ 2, matla a khoheli a itseng ke 2.2 ~ 2.3, 'me bongata ba bongata hangata ke 1.5 ~ 1.8. E na le khanyetso e phahameng ea mocheso, khanyetso ea oxidation, ho hanyetsa kutu, ho hanyetsa mocheso oa mocheso, matla a phahameng, boima bo botle, matla a ho itšehla thajana, matla a matla a mocheso, motlakase oa motlakase le lisebelisoa tse ling tse ikhethang tsa 'mele le lik'hemik'hale. E na le khanyetso e khethehileng ea oxidation, ho itšehla thajana le polasetiki ka mocheso o phahameng, le thepa e ntle ea motlakase, ea mocheso le ea ho khomarela. E ka sebelisoa e le filler kapa tshebetso IMPROver bakeng sa rabara, polasetiki le tse fapa-fapaneng composite thepa ho ntlafatsa ho apara ho hanyetsa, compression hanyetsa kapa conductivity ea thepa. The valve gasket, ho paka le setulo hangata li entsoe ka graphite.
Graphite ea boemo bo phahameng ba ho qhibiliha, ho 3000 ¡æ tlas'a vacuum ke ho qala ho nolofatsa e atisa ho qhibiliha, graphite evaporated sublimation ho 3600 ¡æ, thepa e akaretsang tlas'a matla a mocheso o phahameng e fokotseha butle-butle, ha graphite e futhumetse ho 2000. Leha ho le joalo, matla a eona ke mocheso o tloaelehileng habeli ho e-na le hoo, empa phapang ea khanyetso ea oxidation ea sekhahla sa graphite oxidation e ile ea eketseha butle-butle ka mocheso.
Thermal conductivity le conductivity ea motlakase ea graphite e phahame haholo, conductivity ea eona e phahame ka makhetlo a 4 ho feta tšepe e sa hloekang, makhetlo a 2 ho feta carbon steel, makhetlo a 100 ho feta a se nang tšepe ka kakaretso. conductivity lona mogote, eseng feela ho feta tšepe, tšepe, lead le lisebelisoa tse ling tsa tšepe, empa hape le mocheso eketsa conductivity mogote fokotseha, e leng fapane le thepa kakaretso tšepe, ka mocheso phahameng haholo, graphite esita le atisa ho boemo adiabatic. Ka hona, tlas'a maemo a mocheso o phahameng haholo, ts'ebetso ea ho kenya li-graphite e tšepahala haholo. Graphite e na le lubricity e ntle le polasetiki, coefficient ea graphite friction e ka tlase ho 0.1, graphite e ka ntlafatsoa hore e be letlapa le khanyang, karolong ea pele ea boima ba graphite bo boholo haholo, esita le lisebelisoa tsa daemane li thata ho sebetsa. Graphite e na le botsitso ba lik'hemik'hale, ho hanyetsa acid, ho hanyetsa alkali, ho hanyetsa ho bola ha li-solvents. Ka lebaka la thepa e ikhethang e kaholimo ea graphite, ts'ebeliso ea sejoale-joale ea indasteri e ntse e tsoela pele hantle.
Mokhoa oa ho hokahanya pakeng tsa actuator ea motlakase le valve ka 'ngoe
Motlakase oa motlakase o tsamaisana haholo le valve, e sebelisoang tsamaisong e ikemetseng ea ho laola. Ho na le mefuta e mengata ea li-actuator tsa motlakase, tse fapaneng ka mokhoa oa ts'ebetso. Mohlala, angular stroke actuator ke torque ea angular e hlahisoang, ha mochini o otlolohileng oa motlakase e le sepheo sa ho falla. Mofuta oa motlakase oa motlakase ts'ebetsong ea tsamaiso o lokela ho khethoa ho ea ka litlhoko tsa mosebetsi oa valve.
Mokhoa oa ho hokahanya
Khokahano ea I. Flange:
Ena ke mokhoa o tloaelehileng haholo oa ho hokahanya o sebelisoang li-valve. Ho ea ka sebopeho sa bokaholimo bo kopaneng, bo ka aroloa ka tse latelang:
1. Mofuta o boreleli: o sebelisetsoa li-valve tse nang le khatello e tlaase. Ts'ebetso e bonolo
2, mofuta oa concave le convex: khatello e phahameng ea ho sebetsa, e ka sebelisoa ka har'a washer e thata
3. Tenon le mofuta oa groove: gasket e nang le deformation e kholoanyane ea polasetiki e ka sebelisoa mecheng e senyang, 'me phello ea ho tiisa e molemo.
4, mofuta oa trapezoidal groove: e nang le selikalikoe sa tšepe e oval e le washer, e sebelisoang khatellong ea ho sebetsa ea 64 kg / cm2 valve, kapa mocheso o phahameng oa mocheso.
5, mofuta oa lense: washer ke sebopeho sa lense, se entsoeng ka tšepe. Bakeng sa li-valve tse phahameng tsa PRESSURE LE KHATELLO EA HO SEBETSA EA 100 kg / CM2, kapa li-valve tse phahameng tsa mocheso.
6, Mofuta oa selikalikoe: Ena ke mofuta o mocha oa khokahano oa flange, o ntlafalitsoe ka ponahalo ea lesale la O la rabara e fapaneng, e ka phello ea tiiso ea foromo ea khokahano.
Ea bobeli, khokahanyo ea khoele:
Ena ke mokhoa o bonolo oa ho hokahanya 'me hangata o sebelisoa ka li-valve tse nyenyane. Ho na le linyeoe tse ling tse peli:
1, ho tiisa ka ho toba: likhoele tsa ka hare le tsa ka ntle li bapala karolo ea ho tiisa ka ho toba. E le ho etsa bonnete ba hore lenonyeletso ha le tsoe, hangata ka oli ea lead, linoleum le PTFE lihlahisoa tse tala tse tlatsitsoeng; Ptfe thepa e tala lebanta, tshebediso ya e ntseng e eketseha ratoa; Boitsebiso bona bo na le khanyetso e ntle ea kutu, phello ea ho tiisa, ho bonolo ho e sebelisa le ho e boloka, ho qhaqhoa, e ka tlosoa ka ho feletseng, hobane ke filimi e se nang viscous, e phahametseng oli e etellang pele, linoleum.
2. Ho tiisa ka tsela e sa tobang: matla a screw tightening a fetisetsoa ho washer pakeng tsa lifofane tse peli, e le hore washer e phethe karolo ea ho tiisa.
Boraro, khokahano ea letsoho la karete:
Khokahano le molao-motheo oa ho tiisa ha letsoho la clamping ke hore ha nate e tiisitsoe, sleeve ea clamping e tlas'a khatello, e le hore bohale ba eona bo lome leboteng le ka ntle la phala, 'me lesela le ka ntle la clamping le haufi le khoune ea' mele e kopaneng. tlas'a khatello, kahoo e ka thibela ho lutla ka botšepehi.
Melemo ea mofuta ona oa khokahano ke:
1, boholo bo nyane, boima bo bobebe, sebopeho se bonolo, disassembly e bonolo;
2, khokahanyo e matla, mefuta e mengata ea tšebeliso, e ka mamella khatello e phahameng (1000 kg / cm2), mocheso o phahameng (650¡æ) le ho sisinyeha ha tšabo.
3, e ka khetha lisebelisoa tse fapaneng, tse loketseng ho thibela kutu;
4, litlhoko tsa ho nepahala ha mochini ha li phahame; Ho bonolo ho kenya sebakeng se phahameng.
Foromo ea khokahano ea sleeve ea clamping e sebelisitsoe lihlahisoa tse nyane tsa li-valve tsa bophara ba China.
Nne, kgokelo ya clamp:
Ena KE MOKHOA OA KHOPOLO O HLOKANG FEELA BOLUTU TSE PEDI MME O LOKELANG BAKENG SA LI-VALVE TSA KHATELLO tse tlase tse ntšoang khafetsa.
Bohlano, khokahanyo ea ka hare ea ho ithatafatsa:
Ka holim'a mefuta eohle ea liforomo tsa khokahano, ke ts'ebeliso ea matla a kantle ho fokotsa khatello ea seaplane, ho fihlela tiiso. Se latelang se hlalosa mokhoa oa ho itlama ka khokahanyo ho sebelisa khatello e mahareng. Lesale la eona la ho tiisa le kenngoa ka har'a khoune e ka hare, ka lehlakoreng le leng le fapaneng le lehlakoreng le itseng, khatello ea mahareng ho ea ho khoune e ka hare, 'me e fetisetsoa ho lesale la ho tiisa, ka Angle e itseng ea holim'a khoune, e hlahisa likarolo tse peli, e le 'ngoe e tšoanang. mola o bohareng oa 'mele oa valve ka ntle, khatello e' ngoe ho lerako le ka hare la 'mele oa valve. Karolo ea ho qetela ke matla a ho ithatafatsa. Ha khatello e mahareng e le kholo, ho na le matla a ho ithatafatsa. Kahoo mofuta ona oa ho hokahanya o loketse li-valve tse phahameng tsa khatello. E boloka lintho tse ngata le mosebetsi o boima ho feta khokahanyo ea flanged, empa hape e hloka palo e itseng ea preload, e le hore khatello ea valve e se e phahameng, tšebeliso e ka tšeptjoang. Belofo e entsoeng ka molao-motheo oa ho itiisa ka boeona hangata ke valve ea khatello e phahameng.
Ho na le mefuta e mengata ea ho hokahanya ha valve, mohlala, ba bang ha ba hloke ho tlosa valve e nyenyane, e kopantsoeng hammoho le phala; Li-valve tse ling tseo e seng tsa tšepe, tse sebelisang khokahano ea socket, joalo-joalo. Basebelisi ba li-valve ba lokela ho phekoloa ho latela maemo a khethehileng.
Nako ea poso: Jul-29-2022
