Ebyuma ebizimba enkola y’okutambuza amazzi mu bitundu ebikulu nga gearbox torque converter (eyogerwako nga double change) ne work unit hydraulic system mu multi-way reversing valve ne O-ring ne seals endala, ebisinga bibadde bikozesebwa fluorine rubber (FKM) okusiba ekintu kirina okuziyiza amafuta okulungi, okuziyiza okunyiga n’okugumira ebbugumu eringi n’ebirala, okusobola okuziyiza okukulukuta kw’enkola, okulongoosa enkola okuwangaala kituuse ku kikolwa ekimu. Naye olw’okubaawo kw’ebiziyiza ng’ebyo, bbeeyi ya waggulu, obutaziyiza bulungi kwonooneka kwa mafuta mu bbugumu, okuziyiza ennyonta n’ensonga endala embi, ekifuula omuwendo gw’ekintu okweyongera, era kikosa okutunda ekintu, n’olwekyo kyetaagisa okunoonya ekintu ekisiba ekikekkereza era ekiwangaala mu kifo ky’ekintu ekisiba ekiriwo.
HNBR n’Eby’Obugagga byayo
HNBR kika kya ‘elastomer’ ekipya ekiziyiza amafuta ekyatongozebwa kkampuni ya Nippon Zeon mu 1984, eyakolebwa okusobola okutuukiriza obwetaavu obw’amangu obw’ebintu ebikozesebwa mu kapiira mu mbeera enzibu mu mulimu gw’emmotoka. Ye kuziyiza amafuta okulungi ennyo okwa nitrile rubber (code name NBR) molekyu ensengekera ya kaboni-kaboni double bond selectively hydrogenated (saturated) processing y’ensengekera ya molekyu y’enkyukakyuka, okukyusa NBR okugumira ebbugumu, maroon eddagala okutebenkera kw’obunafu bw’abaavu, n’amaanyi amalungi ennyo n’okugumira ebbugumu erya waggulu n’erya wansi, okuziyiza amafuta n’emikutu gy’eddagala nga okugumira omulimu ogw’enjawulo, ogw’enjawulo era ogw’enjawulo ennyo. Mu kiseera kye kimu akuuma obugumu obulungi obw’okwambala n’okukola kwa NBR. Bw’ogeraageranya ne FKM ne NBR
Ebikulu ebikwata ku nkola ya HNBR bye bino wammanga:
(1) Okukyusa ebbugumu: HNBR esobola okukozesebwa okumala ebbanga eddene ku l50 °C , okukozesa ebbugumu mu bbanga ettono okutuuka ku l75 °C.
HNBR, esobola okukozesebwa okumala ebbanga eddene ku 230 °C , okukozesa okw’ekiseera ekitono okw’ebbugumu okutuuka ku 300 °C . Okuziyiza ebbugumu lya HNBR wakati wa NBR ne FKM, naye mu ngeri y’okuziyiza ebbugumu eritono, okuziyiza kwa FKM okw’ennyogoga kubi (-15 °C nti kyangu okumenya okumenya); era HNBR erina omulimu omulungi ennyo mu bbugumu eri wansi, ng’erina bbalansi ennungi wakati w’okuziyiza amafuta
(2) Ebintu ebirabika n’ebyuma: kapiira akasinga okugumira amafuta olw’amaanyi g’okusika amatono, kale akoma ku bunene bw’okugikozesa, gamba nga FKM amaanyi g’okusika aga 19.6-21.6MPa, amaanyi ga HNBR okusinga NBR, ACMXNBR, EPDM ne FKM n’ebika bya kapiira ebirala biri waggulu, nga Zeon ZSC hydrogenated nitrile butadiene amaanyi g’okusika kapiira okutuuka ku 6OMPa ekisinga obukulu, HNBR ku bbugumu erya waggulu ( Ekisinga obukulu, HNBR ku bbugumu erya waggulu ( 15O °C ) wansi w’amaanyi ( 14.7-29.4MPa ) n’ebbugumu ery’omu kisenge NBR okukuuma omutindo gwe gumu ku bbugumu erya waggulu mu mafuta ag’enjawulo agazibu n’emikutu gy’eddagala ekyasobola okukuuma eby’obutonde ebirungi ennyo, ebbugumu erya waggulu n’eby’ebyuma zisinga ezisinga obungi ku mubiri omulala ogwa elastic ah, okuziyiza okusika okulungi Okuyita mu kukwatagana okutuufu
Okugatta tekinologiya, osobola okufuna omulimu omulungi ennyo ogw’okunyigiriza okw’ebbugumu ery’enkalakkalira, era omulimu guno ogwa FKM si mulungi nga.
(3) okuziyiza emikutu gy’eddagala: HNBR erina okugumira amafuta okulungi ennyo ku bbugumu erya waggulu, okugumira ebizigo eby’enjawulo amafuta g’amazzi, amafuta g’amafuta agalimu ebirungo eby’enjawulo, amafuta ag’amaanyi agakola oxidizing oxidizing n’omulimu gw’ebyuma slag, era erina okugumira ozone okulungi ennyo, okugumira emisinde egy’ebbugumu eringi n’okugumira amazzi agookya.
Okusinziira ku mpisa za HNBR waggulu, bw’ogeraageranya ne FKM, eyasooka okukola obulungi okutwalira awamu, FKM, wadde nga mu kuziyiza ebbugumu, okuziyiza amafuta, okuziyiza amafuta okw’okwokya kusinga HNBR, naye HNBR mu bbugumu ly’okukola ery’ebintu eby’ebyuma eby’okuziyiza omukka, okugumira ebirungo ebigattibwa mu mafuta, okuziyiza okufuuka omukka n’okuvunda kw’amafuta n’eddagala eddala eby’obugagga, gamba nga ebisukkulumye ku FKM. Okugatta ku ekyo, FKM mu nkola y’okukola n’okubumba olw’obutatambula bulungi bw’ebintu, ebigimusa n’omutindo gw’ebintu tegunywevu, kale omuwendo gwayo. Okugatta ku ekyo, FKM ya bbeeyi nnyo mu nkola y’okukola n’okubumba olw’okutambula obubi kw’ebintu, ebigimusa ebitali binywevu n’omutindo gw’ebintu, ate HNBR ya bbeeyi ntono okusinga FKM olw’okubumba n’okulongoosa ebintu ebirungi, okukola obulungi n’ebbeeyi eya wansi.
Embeera y’okukozesa HNBR n’okwekenneenya okukozesebwa kwayo mu byuma ebizimba
Olw’omulimu omulungi ennyo ogwa HNBR, ebadde ekozesebwa nnyo mu bintu bingi okudda mu kifo kya FKM mu mawanga ag’ebweru: ebadde ekozesebwa mu mulimu gw’emmotoka okukola crankshaft y’emmotoka mu maaso n’emabega ne gearbox oil seals, H-type shaft seals, seals for fuel injection system, piston cylinder vibration damping seals, carburetor O-rings, n’ebirala; era mu makolero g’ebyuma, ekozesebwa mu kukola ebyuma eby’ebyuma ebiyiringisibwa ebya layini enkulu eby’ekisiki ebya dayamita eby’enjuyi bbiri, n’ebizibiti bya ssilindala ezifaanana nga ffaani mu kyuma ky’awaka ekisuula obutasalako; era mu makolero g’amafuta, ekozesebwa mu kukola ebyuma ebisima, n’ebizibiti by’ebyuma ebisima. Mu makolero g’amafuta, zikozesebwa okukola seal ya drill bit protector for drilling wellhead sealing, oil plug pump sealing, n’ebirala.
Ku loaders n’ebyuma ebirala ebizimba, ebitundu byayo ebitambuza amazzi nga ggiya, torque converter internal normal operating temperature theoretically 8O-90 °C , ekisinga obunene tekisukka 120 °C , naye nga essaawa empanvu ez’omulimu ogusukkiridde. Okutuuka oba n’okusukka 130 °C enzirukanya y’omunda ey’amazzi ag’ebbugumu eringi okwonooneka n’okwonooneka okumala ekiseera, ate ebitundu by’ekyuma ekiwujjo (okutambula kw’ebyuma (meshing movement of metal components and time of work process of the metal shavings falling in the working medium) mu mafuta agookya ag’ebbugumu eringi agavugibwa ebisiba ebireetebwa okukosebwa kw’ebisiba, bwe kityo ne kikosa obulamu bw’ebyuma ebisiba.
Nolwekyo, HNBR esobola okukozesebwa mu maanyi g’ebbugumu eringi, okuziyiza ebbugumu ettono, ebbugumu ery’amaanyi okunyigirizibwa okukyukakyuka okw’olubeerera, oxidation ne asidi okuvunda amafuta n’ebyuma sludge performance n’ebintu ebirala eby’ebbeeyi y’ebirungi ebiragiddwa, n’okukyusa kwayo kwa FKM seal eriwo kati, byombi okulongoosa obulamu bw’obuweereza bwa seals, naye era okukendeeza ku mirundi gy’okukyusa ekifo ekikola; era okuziyiza ebbugumu eringi okwa FKM kutono nnyo. Ku byuma ebizimba ebikola ekyuma enkola y’amazzi, enkola ekola puleesa okutwalira awamu eri 16MPa (ye nkola ya puleesa eya waggulu), ekifo ekikola (HM46 oba HM32 woyiro w’amazzi) eky’ebbugumu erya bulijjo ery’okukola erya 45-55 °C , olw’embeera y’okukola ey’ekyuma embi, nga kwogasse n’enkola etali ntuufu ey’omukozesa nga kwotadde n’okugoberera emigaso gy’ebyenfuna egy’okutikka ennyo, bali prone to make the hydraulic system flow oil temperature Okusukka ekkomo lino, bwe kityo ne kireeta okwonooneka kwa woyiro w’amazzi.
Okugatta ku ekyo, ebitonde by’enkola y’amazzi ebitundu by’entambula ey’okutambula ku sipiidi ey’amaanyi (ppampu y’amazzi) n’okusereba okukyukakyuka (frequent reciprocating sliding (hydraulic cylinder piston rod and multi-way reversing valve valve stem) nakyo kivaamu ekyuma slag n’amafuta okwonooneka, seals nazo ziva ku kukosebwa kw’okusikagana, enkola endala okulemererwa okuva ku kukendeera kwa puleesa n’okufiirwa mu bwangu, 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 Ku seals za NBR eziriwo, olw’amaanyi gaayo ag’okusika n’okuziyiza okuvunda kwa woyiro era nga nnyangu nnyo okulemererwa, olw’amaanyi ga HNBR, okuddamu okulungi, mu kitundu ky’okufiirwa puleesa okw’amangu ku nkola ya seals zirina akakwate katono, kale mu enkola y’amazzi eya silinda, ppampu, vvaalu, n’ebitundu ebirala eby’amazzi ku nkozesa ya HNBR seals esobola okulongoosa ennyo sealing effect n’obulamu bw’okuweereza.
