Roj hmab sealing rings yog siv nyob rau hauv ib tug loj spectrum ntawm scenarios, xws li los ntawm hnyav industrial khoom mus rau cov khoom me me. Cov kev xav tau hais txog qhov kub thiab txias, kev sib raug zoo hauv xov xwm, kev ua haujlwm siab, thiab hnav tsis kam sib txawv heev nyob ntawm daim ntawv thov. Cov hauv qab no qhia txog cov kev siv los ntawm cov haujlwm tseem ceeb, qhia txog cov xwm txheej tshwj xeeb ntawm daim ntawv thov thiab cov yam ntxwv ntawm cov khoom siv:
Cov Khoom Siv Hluav Taws Xob: Tsim nyog rau siab - Siab, Siab - Kub, thiab Corrosive yam mob heev
Industrial applications demand the highest levels of reliability. Seals must withstand high pressures (>10 MPa), high temperatures (>150 degree), los yog corrosive media (xws li roj cav, hydraulic kua, lossis tshuaj kuab tshuaj). Cov ntawv thov uas muaj xws li:
⑴ Hydraulic thiab Pneumatic Systems:
Daim ntawv thov thaj chaw: Piston thiab piston pas nrig ntsaws ruaj ruaj rau hydraulic twj, hydraulic kheej kheej, thiab pneumatic thooj voos kheej kheej; valve spool seals rau hydraulic li qub.
Cov ntsiab lus tseem ceeb: Siab - siab tsis kam (20-50 MPa); tsis kam rau hydraulic kua / compressor roj corrosion; hnav tsis kam (kom tiv taus siab - zaus reciprocating piston txav).
Common Rubber Materials: Nitrile Rubber (NBR: oil-resistant, cost-effective, suitable for standard hydraulic systems); Fluoroelastomer (FKM: withstands temperatures >200℃thiab muaj zog corrosion, haum rau siab - hydraulic chaw nres tsheb).
Piv txwv li: Lub tog raj kheej hydraulic piston foob nyob rau hauv lub excavator ua los ntawm NBR; Nws tiv taus 30 MPa ntawm lub siab, tiv thaiv cov kua dej ntws tawm thoob plaws lub piston, thiab ua kom lub tog raj kheej txuas ntxiv thiab thim rov qab.
⑵ Cov Khoom Siv Tshuaj thiab Tshuaj:
Daim ntawv thov thaj chaw: Reactor nkoj flanges, yeeb nkab fittings, thiab valve seals; seals rau cov tshuaj hloov pauv cov kav dej.
Cov ntsiab lus tseem ceeb: Ua kom muaj zog acids, muaj zog alkalis, thiab cov kuab tshuaj organic (xws li hydrochloric acid, ethanol); ua raws li cov qauv kev huv huv (kev siv tshuaj xav tau cov ntaub ntawv uas tsis muaj ntxhiab thiab tsis muaj leaching).
Cov Khoom Siv Roj Hmab: Fluoroelastomer (FKM: muaj zog corrosion kuj); Ethylene Propylene Diene Monomer (EPDM: resistant rau qaug zog alkalis, huv qib); Perfluoroelastomer (FFKM: huab cua corrosion kuj, haum rau semiconductor tshuaj ua). Piv txwv: Lub flange foob rau cov tshuaj reactor ua los ntawm fluororubber; nws tiv taus qhov kub thiab txias ntawm 180℃thiab 5% hydrochloric acid corrosion, tiv thaiv cov xau ntawm cov tshuaj tiv thaiv tawm uas tuaj yeem ua rau muaj kev nyab xeeb.
⑶ General Machinery thiab Khoom Siv:
Daim ntawv thov thaj chaw: lub cev muaj zog bearings, twj tso kua mis lub cev ntsaws ruaj ruaj, compressor kawg caps.
Cov ntsiab lus tseem ceeb: Kub tsis kam (-20℃txog 120 degree), tiv thaiv roj corrosion, tsis suav nrog plua plav.
Cov khoom siv roj hmab: Nitrile roj hmab (NBR, roj-resistant), silicone roj hmab (VMQ, qis- kub resistant, haum rau cov khoom nyob rau hauv cov cheeb tsam txias).
Piv txwv: Ib lub foob rau lub twj tso kua dej ua los ntawm cov roj hmab nitrile; nws tiv thaiv dej hauv lub twj tso kua mis los ntawm kev nkag mus rau hauv cov kabmob thaum thaiv cov plua plav sab nraud, yog li tsis txhob muaj cov kabmob xeb thiab ntes.
Kev Thauj Khoom: Haum rau Dynamic, Huab cua-resistant, thiab Roj- tiv taus kev ua haujlwm
Cov ntsaws ruaj ruaj hauv kev thauj mus los yuav tsum tiv taus "siab- zaus txav" (piv txwv li, tsheb pistons, marine rotating shafts), "ib puag ncig tsis txaus" (xws li, siab- tshav kub raug, txias txias), thiab "cov xov xwm tshwj xeeb" (piv txwv li, roj, coolant). Cov ntawv thov uas muaj xws li:
⑴ Automotive Kev Lag Luam:
Daim ntawv thov thaj chaw: Cav (piston seals, roj yias seals), kis tau tus mob (iav roj foob), roj systems (roj tank caps, roj kab connectors), cua txias systems (radiator seals), qhov rooj thiab qhov rais (qhov rooj weatherstrips-thaum sawb- zoo li, lub hauv paus ntsiab lus tseem ceeb zoo ib yam li lub nplhaib foob).
Cov ntsiab lus tseem ceeb: High-kub tsis kam (150℃-200℃rau lub cav- qhov chaw nyob ib sab), tiv thaiv roj / cav roj / dej txias corrosion, thiab kev laus tiv thaiv (kom tiv thaiv tshav ntuj thiab nag).
Cov khoom siv roj hmab feem ntau: Nitrile roj hmab (NBR, cav roj foob), fluororubber (FKM, siab-kub roj tshuab), EPDM roj hmab (qhov rooj / qhov rai weatherstrips, cua txias; huab cua tsis zoo).
Piv txwv li: Lub tsheb cav roj yias foob ua los ntawm nitrile roj hmab; nws tiv taus qhov kub thiab txias ntawm 180℃thiab cav roj corrosion, tiv thaiv cov roj los ntawm qhov sib txawv ntawm cov roj lauj kaub thiab lub tog raj kheej thaiv.
⑵ Marine thiab Aerospace:
Daim ntawv thov thaj chaw: Marine propulsion ncej ntsaws ruaj ruaj, roj kab txuas; aircraft hydraulic system seals, cabin qhov rooj thiab qhov rais seals. Cov ntsiab lus tseem ceeb: Cov ntawv thov dej hiav txwv xav tau kev tiv thaiv dej hiav txwv corrosion thiab roj; aerospace daim ntawv thov yuav tsum tau lub teeb yuag zog, tsis kam mus rau huab cua kub (-50℃rau 250 degree), thiab high-pressure kuj.
Cov khoom siv roj hmab feem ntau: Neoprene (CR; rau kev siv dej hiav txwv; tiv taus dej hiav txwv thiab kev laus), Fluoroelastomer (FKM; rau aerospace hydraulic systems), Silicone roj hmab (VMQ; rau cabin qhov rooj / qhov rai seals; qis-kub resistant).
Piv txwv: Marine thruster ncej ntsaws ruaj ruaj ua los ntawm Neoprene; cov no tiv taus seawater corrosion thiab hlab ntsha kev co, tiv thaiv seawater ingress thaum ib txhij thaiv lubricant to.
Cov Neeg Siv Khoom thiab Tsev Neeg: Kev Sib Tham Txog Kev Nyab Xeeb, Kev Nyab Xeeb, thiab Tus Nqi -kev ua tau zoo
Cov neeg siv khoom thov muab qhov kev xav tau siab dua ntawm "kev nyab xeeb" (xws li, kev sib cuag zaub mov, kev ntim roj) thiab "tus nqi-kev ua tau zoo." Common siv muaj xws li:
⑴ Cov kav dej thiab cov khoom siv roj:
Daim ntawv thov thaj chaw: Cov yeeb nkab dej fittings (xws li, tshuab ntxhua khaub ncaws inlet hose connectors), gas dej rhaub sib txuas, thiab roj qhov cub txuas seals.
Cov ntsiab lus tseem ceeb: Kev tiv thaiv dej / roj av corrosion, tsis yog - toxicity (kev tiv thaiv cov pa paug rau kev siv roj), thiab tus nqi qis.
Cov khoom siv roj hmab feem ntau: EPDM (dej-} tiv taus, tsis muaj ntxhiab), Nitrile roj hmab (NBR; roj-} tiv taus; siv rau hauv cov xwm txheej tshwj xeeb).
Piv txwv: Sealing rings rau tsev ntxhua khaub ncaws inlet hose connectors ua los ntawm EPDM; cov no tiv thaiv kais dej corrosion thiab, thaum compressed los ntawm qhov haum, tiv thaiv dej to ntawm qhov chaw sib txuas, yog li tsis txhob muaj dej hauv pem teb.
⑵ Khoom noj khoom haus thiab khoom siv hauv tsev:
Daim ntawv thov thaj chaw: Rice cooker seals (sealing the cap to the pot body), electric pressure cooker seals, fridge door gaskets (loop or strip type), and water dispenser spout seals.
Cov ntsiab lus tseem ceeb: Khoom noj khoom haus- qib hu (raws li GB 4806 tus qauv; tsis muaj leaching ntawm cov teeb meem tshuaj), qhov kub thiab txias tsis kam (mov cookers yuav tsum tau ua hauj lwm mus rau 120 degree), thiab tsis kam mus rau chav corrosion.
Cov khoom siv roj hmab feem ntau: Silicone roj hmab (VMQ; zaub mov- qib, kub- tiv taus; qhov kev xaiv tseem ceeb), EPDM (rau qis- nqi, khoom noj- daim ntawv thov qib).
Piv txwv: Lub nplhaib sib khi rau lub hau ua mov yog ua los ntawm cov khoom noj- qib silicone roj hmab. Thaum rhuab, nws compresses kom sau qhov sib txawv ntawm lub hau thiab lub lauj kaub lub cev, tiv thaiv cov pa tawm, ua kom lub siab sab hauv mus txog qhov xav tau, thiab cia cov mov ua kom zoo.
⑶ Cov khoom siv niaj hnub:
Daim ntawv thov thaj chaw: Thermal flask hau seals, kis las dej lub raj mis sealing rings, tso quav tso quav.
Cov ntsiab lus tseem ceeb: Tsawg- qhov kub thiab txias tsis kam (cov dej kub kub yuav tsum tau ua kom qis qis rau -20 degree), dej tsis kam, sealing kev ua tau zoo (kev tiv thaiv tawm), thiab yooj yim ntawm kev tu.
Cov khoom siv roj hmab: Silicone roj hmab (VMQ; muaj qhov kub thiab txias thiab yooj yim los ntxuav) thiab Nitrile roj hmab (NBR; siv rau hauv qis dua - cov ntawv siv lub raj mis dej nqi).
Piv txwv li: Lub nplhaib sealing rau lub hau lub hau yog ua los ntawm silicone roj hmab. Thaum compression, nws ua rau qhov sib txawv ntawm lub hau thiab lub khob qhib, thaiv cov cua convection thiab cua sov hloov mus rau qhov kub thiab txias, thaum tseem tiv thaiv cov dej to.