Kuti mafuta odzola asatuluke komanso kuti zinthu zakunja zisalowe, chivundikiro chozungulira chopangidwa ndi chinthu chimodzi kapena zingapo chimamangiriridwa pa mphete imodzi kapena chotsukira cha bearing ndikukhudza mphete ina kapena chotsukira, zomwe zimapangitsa kuti pakhale mpata wochepa wotchedwa labyrinth. Mphete za rabara zokhala ndi gawo lozungulira ndi zomwe zimapanga mphete yotsekera. Imadziwika kuti mphete yotsekera yooneka ngati O chifukwa cha gawo lake looneka ngati O.

1. Mphete yotsekera mphira ya nitrile ya NBR

Madzi, mafuta a petulo, mafuta a silicone, mafuta a silicone, mafuta odzola opangidwa ndi diester, mafuta a hydraulic opangidwa ndi mafuta, ndi zina zotero zingagwiritsidwe ntchito pamodzi. Pakadali pano, ndi chisindikizo cha rabara chotsika mtengo komanso chogwiritsidwa ntchito kwambiri. Sikovomerezeka kugwiritsa ntchito ndi zinthu zosungunulira za polar monga chloroform, nitrohydrocarbons, ketones, ozone, ndi MEK. Kutentha koyenera kugwiritsidwa ntchito ndi -40 mpaka 120 °C.

2. Mphete yotsekera mphira ya HNBR yopangidwa ndi hydrogenated nitrile

Ili ndi mphamvu yolimbana ndi ozone, kuwala kwa dzuwa, ndi nyengo, ndipo imalimbana kwambiri ndi dzimbiri, kusweka, ndi kupsinjika. Ndi yolimba kwambiri poyerekeza ndi rabara ya nitrile. Ndi yabwino kwambiri poyeretsa mainjini a magalimoto ndi zida zina. Sikoyenera kugwiritsa ntchito izi ndi mankhwala onunkhira, ma alcohols, kapena ma esters. Kutentha koyenera kugwiritsidwa ntchito ndi -40 mpaka 150 °C.

3. Mphete yotsekera mphira ya silikoni ya SIL

Ili ndi mphamvu yabwino kwambiri yolimbana ndi kutentha, kuzizira, ozone, ndi ukalamba wamlengalenga. Ili ndi mphamvu zabwino kwambiri zotetezera kutentha. Sizimalimbana ndi mafuta, ndipo mphamvu zake zokoka zimakhala zochepa kuposa za rabara wamba. Ndi yabwino kugwiritsa ntchito ndi zotenthetsera madzi zamagetsi, ma aroni amagetsi, ma uvuni a microwave, ndi zida zina zapakhomo. Ndi yoyeneranso pazinthu zosiyanasiyana, monga akasupe amadzi ndi ma ketulo, omwe amakhudza khungu la munthu. Sikoyenera kugwiritsa ntchito sodium hydroxide, mafuta, ma acid ochulukirapo, kapena zosungunulira zambiri zosungunuka. Kutentha kwa ntchito wamba ndi -55~250 °C.

4. Mphete yotsekera mphira ya VITON fluorine

Kukana kwake kwabwino kwa nyengo, ozone, ndi mankhwala kumafanana ndi kukana kwake kutentha kwambiri; komabe, kukana kwake kuzizira n'kochepa. Mafuta ambiri ndi zosungunulira, makamaka ma acid, aliphatic ndi aromatic hydrocarbons, komanso mafuta a masamba ndi nyama, sizimakhudza. Ndibwino kwambiri pamakina amafuta, malo opangira mankhwala, komanso zofunikira pakutseka injini za dizilo. Kugwiritsa ntchito ndi ma ketones, ma esters otsika kulemera kwa mamolekyulu, ndi zosakaniza zokhala ndi nitrates sikuvomerezeka. -20 mpaka 250 °C ndiye kutentha komwe kumagwiritsidwa ntchito nthawi zambiri.

5. Mphete yotsekera mphira ya FLS fluorosilicone

Kagwiridwe kake ka ntchito kamaphatikiza makhalidwe abwino kwambiri a silicone ndi fluorine rabara. Komanso imapirira kwambiri zosungunulira, mafuta amafuta, kutentha kwambiri ndi kotsika, ndi mafuta. imatha kupirira kuwonongeka kwa mankhwala kuphatikizapo mpweya, zosungunulira zokhala ndi ma hydrocarbons onunkhira, ndi zosungunulira zokhala ndi chlorine. -50~200 °C ndiye mulingo wanthawi zonse wa kutentha komwe kumagwiritsidwa ntchito.

6. Mphete yotsekera mphira ya EPDM EPDM

Ndi yolimba m'madzi, imalimbana ndi mankhwala, imalimbana ndi ozoni, komanso imalimbana ndi nyengo. Imagwira ntchito bwino potseka zinthu zomwe zimaphatikizapo ma alcohols ndi ma ketones komanso nthunzi yamadzi yotentha kwambiri. Kutentha koyenera kugwiritsidwa ntchito ndi -55 mpaka 150 °C.

7. Mphete yotsekera ya CR neoprene

Ndi yolimba kwambiri ku nyengo ndi kuwala kwa dzuwa. Imalimbana ndi ma asidi osungunuka ndi mafuta a silicone, ndipo siopa ma refrigerant monga dichlorodifluoromethane ndi ammonia. Kumbali ina, imakula kwambiri mu mafuta amchere okhala ndi ma aniline ochepa. Kutentha kochepa kumapangitsa kuti ma crystallization ndi kuuma zikhale zosavuta. Ndi yoyenera pamitundu yosiyanasiyana ya mlengalenga, dzuwa, ndi ozone komanso pamitundu yosiyanasiyana ya ma sealing a mankhwala ndi moto. Kugwiritsa ntchito ndi ma acid amphamvu, nitrohydrocarbons, esters, ketone compounds, ndi chloroform sikulangizidwa. Kutentha koyenera kugwiritsidwa ntchito ndi -55 mpaka 120 °C.

8. Mphete yotsekera mphira ya IIR butyl

Imagwira ntchito bwino kwambiri pankhani yolimba kwa mpweya, kukana kutentha, kukana UV, kukana ozone, ndi kutchinjiriza; kuphatikiza apo, imatha kupirira zinthu zomwe zimatha kusungunuka ndi okosijeni komanso mafuta a nyama ndi ndiwo zamasamba ndipo imalimbana bwino ndi zosungunulira za polar kuphatikizapo alcohols, ketones, ndi esters. Yoyenera zida zotsukira vacuum kapena mankhwala. Sikoyenera kuigwiritsa ntchito ndi kerosene, aromatic hydrocarbons, kapena zosungunulira za petroleum. -50 mpaka 110 °C ndiye mulingo wanthawi zonse wa kutentha komwe kumagwiritsidwa ntchito.

9. Mphete yotsekera mphira ya acrylic ya ACM

Kukana kwa nyengo, kukana mafuta, komanso kusinthasintha kwa kupsinjika kwake zonse zili pansi pa avareji, komabe mphamvu zake zamakaniko, kukana madzi, komanso kukana kutentha kwambiri zonse ndi zabwino kwambiri. Nthawi zambiri zimapezeka mumakina oyendetsera magetsi ndi ma gearbox a magalimoto. Sizovomerezeka kugwiritsa ntchito ndi mabuleki, madzi otentha, kapena ma phosphate esters. Kutentha koyenera kugwiritsidwa ntchito ndi -25 mpaka 170 °C.

10. Mphete yotsekera mphira yachilengedwe ya NR

Katundu wa rabara ndi wolimba kuti asang'ambike, kutalikirana, kusweka, ndi kusinthasintha. Komabe, umakalamba msanga mumlengalenga, umamatira ukatenthedwa, umakula mosavuta, umasungunuka mu mafuta amchere kapena petulo, ndipo umapirira asidi wofatsa koma osati alkali wamphamvu. Yoyenera kugwiritsidwa ntchito mu zakumwa zokhala ndi ma hydroxyl ions, monga ethanol ndi mabuleki a galimoto. -20 mpaka 100 °C ndiye mulingo wanthawi zonse wa kutentha komwe kumagwiritsidwa ntchito.

11. Mphete yotsekera mphira ya PU polyurethane

Rabala ya polyurethane ili ndi makhalidwe abwino kwambiri a makina; imaposa ma rabala ena pankhani ya kukana kukalamba ndi kukana kupanikizika kwambiri. Kukana kwake kukalamba, ozone, ndi mafuta nakonso ndi kwabwino kwambiri; koma, kutentha kwambiri, imakhudzidwa ndi hydrolysis. Nthawi zambiri imagwiritsidwa ntchito potseka maulumikizidwe omwe amatha kupirira kukalamba ndi kupanikizika kwakukulu. Kutentha koyenera kugwiritsidwa ntchito ndi -45 mpaka 90 °C.