Construction machinery-a hydraulic transmission system-a a component lian ber berte chu gearbox torque converter (double change tia sawi) leh work unit-a hydraulic system-ah multi-way reversing valve-ah O-ring leh seal dangte nen, a tam zawk chu fluorine rubber (FKM) hmanga sealing atan hman a ni tawh a, a material hian oil resistance tha tak a nei a, abrasion resistance leh temperature sang takah pawh a resistance a nei a, chutiang chuan a ven theih nan leakage of the system, tihchangtlun system durability chuan effect engemaw zat a nei a ni. Mahse, chutiang seal awm avang te, man to tak te, oil rancidity chhiatna laka a do that loh avang te, cold resistance leh thil tha lo dangte avang te chuan product man a tisang a, product hralhna a nghawng bawk a, chuvangin sealing material awmsa ai chuan sealing material man tlawm leh chhe thei lo zawng a ngai a ni.
HNBR leh A Thil neihte
HNBR hi kum 1984-a Nippon Zeon-in oil-resistant elastomer chi thar a siam a, hei hi automobile industry-a boruak khirh tak hnuaia rubber fitting mamawhna hmanhmawh tak phuhrukna tura siam a ni. A nitrile rubber (code name NBR) molecular structure-a carbon-carbon double bond selectively hydrogenated (saturated) processing-a oil resistance tha tak a ni a, a inthlak danglamna molecular structure, NBR heat-resistant, maroon chemical stability of the weakness of the poor, thlak danglamna, chakna tha tak leh temperature sang leh hniam laka invenna, oil leh chemical media te do theihna outstanding, unique leh balanced tak performance tha tak a ni. Chutih rual chuan NBR wear resistance leh processability tha tak chu a vawng reng bawk. FKM leh NBR nena khaikhin chuan
HNBR hnathawh dan tlangpui chu hetiang hi a ni.
(1) Temperature adaptability: HNBR hi l50 ah rei tak hman theih a ni a , hun rei lote chhung atan l75 °C thleng temperature hman theih a ni °C .
HNBR, hi 230 ah rei tak hman theih a ni a , hun rei lote chhunga 300 °C thlenga temperature hman theih a ni °C . NBR leh FKM inkarah HNBR heat resistance, mahse temperature resistance hniam lam hawi chuan FKM hian cold resistance a tha lo (-15 °C that is easy to brittle fracture); leh HNBR hian low-temperature performance tha tak a nei a, oil resistance inkara balance tha tak a nei bawk
(2) Physical leh mechanical property: oil-resistant rubber tam zawk chu tensile strength hniam vang a ni a, chuvangin a hmanna tur a tikhawtlai a, chu chu FKM tensile strength 19.6-21.6MPa, NBR aiin HNBR strength, ACMXNBR, EPDM leh FKM leh rubber chi dang a sang zawk a, Zeon ZSC hydrogenated nitrile butadiene te hi a ni rubber tensile strength 6OMPa thlenga a pawimawh zawk chu, HNBR hian temperature sang takah ( A pawimawh zawk chu, HNBR at high temperature ( 15O °C ) under the strength ( 14.7-29.4MPa ) leh room temperature NBR hian complex oil leh chemical media hrang hrangah temperature sang takah level inang a neih theih nan mechanical property tha tak tak, temperature sang tak leh mechanical property tha tak tak a la vawng reng thei a ni an tha zawk elastic ah body dang tam zawk, abrasion resistance tha Through appropriate matching
Technology inzawmkhawm chuan high-temperature compression permanent deformation performance tha tak i hmu thei a, FKM performance hi a tha tawk lo.
(3) chemical media resistance: HNBR hian temperature sang takah oil resistance tha tak a nei a, lubricants chi hrang hrang hydraulic oil, fuel oil additives chi hrang hrang awmna, corrosive oxidizing oils chak tak leh metal slag performance tha tak a nei a, ozone resistance tha tak a nei bawk a, high-temperature radiation resistance leh tui lum resistance a nei bawk.
A chunga kan sawi tak HNBR ziarang atang hian FKM nena khaikhin chuan a hmasa zawk chu a pumpuiah a thawk tha zawk a, FKM hian heat resistance, oil resistance, combustion oil laka resistance hi HNBR aiin tha zawk mahse, HNBR erawh chu working temperature-ah chuan steam resistance, oil additives laka invenna, oxidation leh rancidity degradation of the oil leh chemical dangte mechanical property te a ni property, FKM aia sang zawk ang chi te. Chu bakah, FKM chu manufacturing leh molding process-ah material fluidity tha lo, raw materials leh product performance a stable loh avangin a stable lo a, chuvangin a cost. Hei bakah hian FKM hi material flow tha lo, raw materials leh product performance nghet lo vangin manufacturing leh molding process-ah a man a to zawk a, HNBR erawh FKM aiin material molding leh processing tha, stable performance leh man tlawm zawk vangin a man a to zawk thung.
HNBR hman dan leh construction machinery-a a hman dan thlirletna
HNBR comprehensive performance tha tak avang hian ram dangah FKM thlak nan kawng tam takah hman a ni nasa hle: automobile industry-ah pawh automobile crankshaft hma leh hnung leh gearbox oil seal, H-type shaft seal, fuel injection system atana seal, piston cylinder vibration damping seal, carburetor O-ring, etc. te chu; tin, metallurgical industry-ah chuan metallurgy high-line rolling mill axle diameter double-sided seal siamna atan hman a ni a, domestic continuous casting machine-a fan ang chi cylinder siamna seal siamnaah pawh hman a ni bawk tin, oilfield industry-ah chuan drilling rig siamnaah te, drilling rig siamna atana seal siamnaah te hman a ni bawk. Oilfield industry-ah chuan wellhead sealing, oil plug pump sealing, leh a dangte drilling atana drill bit protector seal siam nan an hmang thin.
Loader leh construction machinery dang tan chuan a hydraulic transmission components gearbox, torque converter internal normal operating temperature theoretically 8O-90 °C , a sang ber chu 120 aia tam lo °C , mahse darkar rei tak overloaded hnathawh ang chi te. 130 thleng emaw a aia tam emaw °C internal cycle of high-temperature fluid deterioration and deterioration over time, chutih laiin metal slag-a a then (meshing movement of metal components leh metal shavings hnathawhna medium-a tla hnathawh hun chhung) chu high-temperature hot oil-ah seal-te’n seal-te an tihbuai vangin seal-te service life a nghawng a, chu chuan seal-te service life a nghawng a ni.
Chuvangin, HNBR hi temperature sang chakna, temperature hniam resistance, high temperature compression permanent deformation, oxidation leh acid degradation of oil leh metal sludge performance leh a dangte man atanga a thatna tarlan te, tuna FKM seal thlakna nen, a pahnih hian seal te service life tihchangtlun nan, mahse working medium thlak tamna pawh tihtlem nan hman theih a ni leh FKM-a temperature sang resistance hi a tlem lutuk tih a chiang hle. Construction machinery working device hydraulic system tan chuan system working pressure chu a tlangpuiin 16MPa (high-pressure system a ni), working medium (HM46 emaw HM32 hydraulic oil) of the normal operating temperature of 45-55 °C , device hnathawh dan a tha lo avangin, a hmangtu hnathawh dan dik lo nen a inzawm bakah overloading atanga economic hlawkna zawn nan, an ni prone to make the hydraulic system flow oil temperature Hetiang limit aia tam, chu chuan hydraulic oil a ti chhe thei a ni.
Chu bakah, high-speed rotary movement (hydraulic pump) leh frequent reciprocating sliding (hydraulic cylinder piston rod leh multi-way reversing valve valve stem)-a hydraulic system components composition hian metal slag leh oil chhiatna a siam bawk a, seal-te pawh hi friction-in a nghawng vang a ni a, system dang failure avanga pressure tihhniam leh pressure hloh nghal vat pawh a awm bawk, are the seals have a negative impact on the current NBR class seals, due to its tensile strength and resistance to degradation of the oil properties NBR seal awm tawhte tan chuan, a tensile chakna leh oil chhe thei lo leh tihchhiat awlsam tak a nih avangin, HNBR chakna avang hian, good recovery, in part of the sudden loss of pressure on the performance of the seals have little impact, so in the HNBR seal hman chungchangah cylinder, pump, valve, leh hydraulic component dangte hydraulic system hian sealing effect leh service life nasa takin a tichangtlung thei a ni.
