Kub tsim cov ntawv titanium rau hauv cov aerospace nyuaj yuav tsum muaj cov roj nplua nyeem uas tuaj yeem tiv taus qhov kub thiab txias. Lub lubricant - ncua kev kawm ntawv ntawm colloidal graphite los yog boron nitride nyob rau hauv dej - yuav tsum tau rhuab ua ntej daim ntawv thov, thiab lub tank rhaub yuav tsum tsis txhob ua rau lub lubricant puas los yog nyob rau hauv ib tug clogging sludge. Titanium kub txheej txheem ua haujlwm ntawm qhov kub siab ua haujlwm (feem ntau 650-900 degree), tab sis cov roj nplua nyeem nws tus kheej yog siv sov, feem ntau yog los ntawm lub tank stirred ntawm 80-90 degree. PTFE immersion heaters tau ua pov thawj tias muaj txiaj ntsig zoo hauv lub luag haujlwm xav tau, muab cov cua sov zoo, tsis muaj paug tsis huv uas khaws cov roj nplua nyeem ruaj khov thiab tiv thaiv fouling.
Lubricant Heating Challenge hauv Titanium txoj kev
Titanium daim ntawv tsim (xws li, rau cov khoom siv hauv aerospace, lub cav cowlings, lossis cov tawv nqaij hypersonic tsheb) tso siab rau cov roj ntsha kub kub kom txo tau kev sib txhuam ntawm cov titanium dawb paug thiab tsim tuag. Colloidal graphite thiab boron nitride yog ib qho kev xaiv vim lawv nyob twj ywm lubrication ntawm liab kub. Ua ntej thov, cov khoom suspensions yog tov nrog dej thiab feem ntau me me ntawm binder. Qhov sib tov yuav tsum tau khaws cia ntawm 80-90℃kom ntseeg tau tias muaj viscosity thiab zoo ib yam ntawm daim ntawv titanium.
Thaum tshav kub kub ncua kev kawm ntawv ntawm cov khoom zoo muaj teeb meem tshwj xeeb. Lub tshuab hluav taws xob ua hluav taws xob ua hluav taws xob zoo sib xws- feem ntau yog ua los ntawm cov hlau tsis muaj steel lossis Incoloy- tuaj yeem tsim cov chaw kub kub ntawm nws qhov chaw. Cov chaw kub no ua rau cov neeg nqa dej kub npau npau npau, ua rau peb qhov txiaj ntsig tsis zoo:
Thermal degradation ntawm lub lubricant:Cov colloidal graphite los yog boron nitride particles aggregate, poob lawv zoo dispersion thiab lubricating muaj peev xwm.
Plating los yog ci rau ntawm lub rhaub:Baked-on deposits tsim ib txheej insulating, txo cov tshav kub hloov efficiency thiab yuam kom lub rhaub kom kub dua.
Kev sib kis nrog hlau ions:Corrosion ntawm cov hlau sheath tso tawm hlau, chromium, los yog npib tsib xee ions rau hauv da dej, uas tuaj yeem ua rau cov roj nplua nyeem tawg lossis ua rau lub ntsej muag titanium thaum tsim.
Hauv aerospace tsim cov khw, kev tswj cov roj nplua nyeem yog qhov tseem ceeb raws li kev tswj xyuas qhov kub thiab txias. Lub lubricant tsis ruaj tsis khov ua rau cov txheej txheem tsis sib xws ntawm daim ntawv titanium, ua rau lub qhov txhab, qhov chaw tsis zoo, thiab cov khoom seem.
PTFE Heater Performance: Maj mam thiab huv si cua sov
A PTFE rhaub titanium ua lubricantinstallation ncaj qha nyob rau txhua qhov tsis ua haujlwm hom tau piav qhia saum toj no. PTFE (polytetrafluoroethylene) immersion heaters yog tsim los nrog tuab, inert fluoropolymer sheath uas encapsulates lub resistive cua sov hlau. Cov txiaj ntsig tseem ceeb ntawm kev ua tau zoo yog raws li hauv qab no.
Tsawg Watt ntom txwv qhov ntsuas kub
PTFE tso cua sov rau cov roj tso tsheb hlau luam yog tsim los nrog kev txuag watt ceev- feem ntau Tsawg dua lossis sib npaug li 1.2 W / cm² (kwv yees li 8 W / in²). Qhov hluav taws xob tsis tshua muaj hluav taws xob tso tawm hauv ib cheeb tsam kom ntseeg tau tias PTFE nto qhov kub thiab txias tsuas yog me ntsis siab dua qhov kub ntawm cov roj nplua nyeem, txawm tias ua haujlwm tas li. Tsis muaj ib qho chaw boiling lossis superheating tshwm sim. Yog li ntawd, cov colloidal graphite los yog boron nitride hais nyob twj ywm tsis muaj thermal aggregation, thiab cov dej cab kuj evaporates uniformly es tsis tsim cov npuas npuas uas tso cov khib nyiab.
Non-stick Surface Tiv Thaiv Lubricant Buildup
Lub cim tsis-stick ntawm PTFE yog ib qho tseem ceeb ntawm kev ua haujlwm zoo. Ci graphite lossis boron nitride sludge tsis ua raws li PTFE nto. Txhua yam uas nyob rau hauv lub rhaub yog yooj yim dislodged los ntawm mechanical agitator los yog los ntawm niaj hnub ncig ntawm da dej. Lub PTFE rhaub nyob twj ywm huv si rau lub sijhawm ntev dua li qhov sib npaug ntawm cov hlau-sheathed, tswj xyuas cov coefficient ntawm cov cua sov sib xws thiab txo cov zaus txij nkawm.
Chemical Inertness Eliminates Contamination
PTFE yog chemically inert rau lub Cheebtsam ntawm titanium forming lubricants, xws li dej, graphite, boron nitride, thiab tej organic binders tam sim no (xws li, acrylic los yog epoxy resins). Nws tso tawm tsis muaj hlau ions, thiab nws tsis catalyze oxidative los yog hydrolytic decomposition ntawm lubricant. Qhov no purity yog ib qho tseem ceeb heev vim hais tias titanium qhov chaw yog heev reactive nyob rau hauv elevated forming kub; ib qho txawv teb chaws ions pauv los ntawm cov roj nplua nyeem mus rau titanium nto tuaj yeem txhawb nqa embrittlement, discoloration, lossis poob ntawm cov khoom siv tshuab.
Kev khiav hauj lwm Parameters thiab Tank Design
Nyob rau hauv ib tug raug titanium kub forming kab, lub lubricant tank yog nruab nrog:
Mechanical agitation(lub kiv cua qeeb qeeb lossis lub twj tso kua mis ncig) kom cov colloidal hais tsis sib xws.
Kev tswj qhov kub thiab txias(PT100 sensor, PID maub los) tswj 80-90℃± 2 degree.
Ib los yog ntau tshaj PTFE immersion heaters, mounted horizontally nyob ze ntawm lub tank hauv qab los yog vertically raws lub sidewall.
Qhov siab tshaj plaws kev khiav hauj lwm kub ntawm PTFE yog 110 degree, muab ib tug xis 20℃kev nyab xeeb paj saum toj no 90℃txheej txheem setpoint. Txawm tias nyob rau hauv kev ntxhov siab tsis ua hauj lwm los yog cov kua qis, PTFE sheath yuav tsis yaj los yog degrade ua ntej muaj kev nyab xeeb txiav tawm. Qhov tsawg watt ceev ntxiv txo qhov kev pheej hmoo ntawm overheating.
Cov Lus Qhia Txog Kev Kho Mob: Kev ntxuav tu ntawm PTFE rhaub
Cov Lus Qhia Txog Kev Kho Mob:Nyob rau lub sijhawm ua haujlwm ntev (piv txwv li, 6-12 lub hlis), cov yeeb yaj kiab nyias ntawm cov graphite qhuav lossis boron nitride tuaj yeem khaws cia rau ntawm PTFE nto, tshwj xeeb tshaj yog nyob rau hauv qhov chaw qis. Kev tu kom huv nrog cov ntaub mos muag lossis daim txhuam cev tsis muaj txhuam, moistened nrog dej sov, tshem tawm cov khib nyiab no yam tsis tau khawb PTFE. Abrasive pads, hlau scrapers, lossis cov dav hlau dej siab siab yuav tsum tau zam, vim tias lawv tuaj yeem ua rau PTFE sheath puas thiab nthuav tawm cov cua sov sab hauv. Tom qab ntxuav, lub rhaub yuav tsum tau muab yaug nrog dej deionized thiab qhuav ua ntej rov immersion.
Sib piv qhov zoo dua lwm txoj kev siv cua sov
| Cua sov hom | Lubricant stability | Sludge Buildup | Kev Tiv Thaiv Kab Mob | Hom Kev Pabcuam Lub Neej |
|---|---|---|---|---|
| Stainless hlau sheath | Tsis zoo (hot spots) | Siab, ceev ci | Hlau, chromium ions | 3–6 lub hlis |
| Titanium ntaub | Nruab nrab | Nruab nrab | Titanium (tsawg, tab sis ua tau) | 6–12 lub hlis |
| Quartz / iav | Zoo (tsawg watt ceev) | Tsawg, tab sis iav fragile | Silica hais (me me) | 4-8 lub hlis (kev pheej hmoo tawg) |
| PTFE encapsulated | Zoo heev | Tsawg heev, kev tu tus kheej | Tsis muaj | 2-5 xyoos |
Piv txwv li: Aerospace Forming Cell
Lub chaw tsim khoom loj hauv aerospace tau hloov cov cua sov hlau hauv lub tank boron nitride lubricant nrog PTFE immersion heaters. Yav dhau los, cov cua sov hlau yuav tsum tau tshem tawm txhua lub limtiam rau kev tshem tawm, thiab cov roj nplua nyeem yuav tsum tau muab tshem tawm tag nrho thiab rov sib xyaw txhua lub hlis vim muaj cov sludge tsub zuj zuj. Tom qab hloov mus rau PTFE cov cua sov ua haujlwm ntawm 1.0 W / cm² thiab 85℃setpoint, cov roj nplaum tseem ruaj khov rau 8 lub lis piam ntawm kev hloov da dej tiav. Kev ntxuav lub tshuab rhaub tsuas yog yuav tsum tau ua txhua txhua peb lub hlis, thiab tsis muaj kev sib kis ntawm cov hlau hauv cov khoom titanium anodized. Kev tsim cov khoom zoo- ntsuas los ntawm qhov chaw tiav thiab qhov tseeb qhov tseeb- txhim kho los ntawm 40% raws li ntsuas los ntawm cov nqi seem tsawg.
Xaus: Cov Khoom Siv Tshwj Xeeb Xav Tau Tshwj Xeeb Cua Sov
PTFE immersion heaters muab lub siab mos, huv si xav tau los ua kom aerospace tsim lubricants ruaj khov thiab zoo. Los ntawm kev khiav hauj lwm ntawm tsawg watt ceev, muab ib tug uas tsis yog-stick nto, thiab qhia tsis muaj hlau ions, lawv tiv thaiv kev puas tsuaj ntawm colloidal graphite thiab boron nitride suspensions nyob rau hauv qhov tseem ceeb ntawm 80-90℃ntau yam. Rau titanium kub sib sau ua haujlwm- qhov twg lubricant kev ua haujlwm ncaj qha cuam tshuam rau qhov zoo thiab lub neej cuab yeej-thePTFE rhaub titanium ua lubricantconfiguration tau dhau los ua qhov kev coj ua zoo tshaj plaws. Cov ntaub ntawv tshwj xeeb xws li graphite thiab boron nitride xav tau cov cua sov tshwj xeeb, thiab cov cua sov PTFE ua tau raws li qhov yuav tsum tau muaj kev ntseeg siab. Raws li kev lag luam aerospace tseem xav tau kev ua tau zoo dua, cov khoom tsis raug titanium tsis muaj qhov tsis zoo, lub luag haujlwm ntawm kev huv, ruaj khov lubricant cua sov yuav tsuas loj hlob hauv qhov tseem ceeb.
