CAT C-9 Nozzle - Qhov kawg Arbiter ntawm roj Atomization thiab combustion zoo

Nyob rau hauv lub ntiaj teb siab siab ntawm HEUI (Hydraulic actuated Electronically controlled Unit Injector) systems, lub nozzle yog qhov twg hydraulic zog transforms rau hauv txhua yam ua hauj lwm. Thaum solenoids ua rau qhov kev tshwm sim thiab swb li qub coj cov roj, nws yognozzleuas ua tau zoo li cov roj tsuag rau hauv ib qho zoo atomized pos huab, txiav txim siab npaum li cas cov roj sib tov nrog compressed cua nyob rau hauv lub combustion tais. Lub nozzle nrog degraded orifices tuaj yeem txo cov thermal efficiency txog li 6%, ua kom cov pa paug paug, thiab ua rau lub suab nrov nrov uas cov tswv feem ntau yuam kev rau cov teeb meem valvetrain. Rau lub cav CAT C-9, lub nozzle sib dhos yog ib tug precision-engineered Cheebtsam uas yuav tsum sib npaug zos muaj peev xwm, tshuaj tsuag lub kaum sab xis, thiab durability tiv thaiv lub erosive rog ntawm high-pressure roj txhaj.

xya tus lej tau lees paub rau lub nozzle -235‑9649, 172‑5780, 188‑8739, 217‑2570, 235‑2888, 236‑0962, thiab remanufactured10R‑7224- sawv cev rau cov kab ke ntawm kev txhim kho rov ua dua tshiab hauv orifice geometry, metallurgy, thiab cov yam ntxwv los tiv thaiv clogging. Cov ntaub ntawv no tsis tuaj yeem hloov pauv yam tsis muaj kev saib xyuas rau lawv cov yam ntxwv tshwj xeeb hydraulic, raws li txhua tus tau ntsuas rau ib qho emission tier thiab chaw ua haujlwm.

Lub nozzle qhov kev ua tau zoo yog tswj hwm los ntawm peb lub ntsiab geometric tsis: tus naj npawb ntawm orifices, lawv txoj kab uas hla, thiab lub kaum sab xis ntawm lub khob hliav qab. Rau tsev neeg C-9, tus qauv teeb tsa yog a6 :lojnozzle nrog orifice diameters xws li los ntawm0.18mm txog 0.22mm, nyob ntawm qhov xav tau ntws tus nqi. Cov tshuaj tsuag lub khob hliav qab yog feem ntau tuav ntawm148℃± 2 degreekom phim lub piston lub tais lub re-entrant tsim, ua kom pom kev siv cua tsis muaj phab ntsa ntub dej.

Peb qhov kev ntsuam xyuas sab hauv ntws tawm qhia pom qhov sib txawv hauv qab no ntawm xya qhov sib txawv:

Tshooj Naj Npawb	Txoj kab uas hla (mm)	Static Flow @ 100 bar (cc / min)	Txau Cone Angle	Daim ntawv thov tseem ceeb
172‑5780	0.185	510	146 degree	Thaum ntxov C-9, kev ua haujlwm qis-siab
188‑8739	0.190	525	147 degree	Txhim kho atomization rau Euro II
217‑2570	0.195	540	148 degree	Tier 2, Standard lub luag haujlwm
235‑2888	0.200	555	148.5°C dej	Tier 2, high-load marine
235‑9649	0.205	570	149 degree	Tier 3, txo qis kev lag luam tawm
236‑0962	0.210	585	149.5°C dej	ULSD-optimized, huab cua txias dua
10R‑7224	0.208 (npe)	575	149 degree	Reman, supersedes tag nrho nrog sib npaug spec

Cov10R‑7224tsis tsuas yog luam ib tug predecessor; nws adopts lub orifice txoj kab uas hla236‑0962tab sis nrog kev hloov kho inlet chamfer uas txo cov cavitation yaig los ntawm 18%, raws li kev txheeb xyuas los ntawm peb cov kev ntsuam xyuas nrawm nrawm. Chav tsev remanufactured no muaj kev sib haum xeeb zoo tshaj plaws ntawm kev khiav thiab kav ntev rau kev ua haujlwm sib xyaw ua ke.

Tsis zoo li cov khoom siv hluav taws xob uas ua tsis tau sai, nozzle degradation yog qhov tshwm sim qeeb, nce zuj zus. Lub dav hlau siab tshaj plaws roj (ntau tshaj 300 m / s ntawm qhov chaw tawm) erodes lub ntse inlet npoo, maj mam nce txoj kab uas hla zoo thiab hloov cov pa coefficient. Lub nozzle uas pib nrog qhov ntws ntawm 540 cc / min yuav, tom qab 6,000 teev, xa 580 cc / min- qhov pom tseeb nce ntxiv uas qhia tau tias tsis zoo ntawm cov tshuaj tsuag, vim tias cov npoo eroded tsim cov tee loj thiab lub kaum ntse ntse.

Peb qhov kev ntsuam xyuas metallurgical ntawm lub217‑2570thiab235‑9649qhia tias tom kawg suav nrog cov hlau boron-doped uas tiv taus yaig 25% zoo dua li qub. Cov10R‑7224yuav siv qhov no ntxiv nrog rau txheej txheej nitrided (kwv yees . 30 µm tuab) uas tswj cov ntug ntse tshaj 10,000 teev nyob rau hauv ib txwm roj pom. Lub neej txuas ntxiv no yog qhov tseem ceeb rau cov tswv uas xav kom zam dhau tus nqi zog ntawm kev tshem tawm cov tshuaj txhaj tshuaj thiab rov kho dua.

Tag nrho xya cov ntaub ntawv yog lub cev sib hloov tau raws li qhov loj me thiab kev sib khi sib txuas, tab sis lawv qhov sib txawv hydraulic yuav tsum tau ua tib zoo saib xyuas lub cav hluav taws xob calibration. ECM khaws cov lej txiav rau cov roj kom muaj nuj nqis raws li cov chav kawm ntws ntawm lub nozzle. Txhim kho a172‑5780(510 cc / min) nyob rau hauv lub cav Ameslikas nruab nrog235‑9649(570 cc / min) yuav ua rau lub cev tsis muaj zog ntawm tag nrho cov load, ua rau kom siab EGTs thiab muaj peev xwm turbocharger overspeed. Conversely, haum lub siab-flow nozzle rau hauv ib tug tsawg-flow daim ntawv thov yuav over-roj, ua rau cov pa luam yeeb dub thiab ua kom muaj kuab paug ntawm DPF (yog tias muaj).

Yog li ntawd, peb xav kom siv lub10R‑7224Raws li kev hloov pauv thoob ntiaj teb, raws li nws cov yam ntxwv ntws (575 cc / min) ntog nyob rau hauv qhov kev hloov pauv ntawm feem ntau C-9 ECM calibrations, yog tias lub roj teeb rov pib ua haujlwm tom qab kev teeb tsa. Xya ntu tus lej ntawm daim duab yog:

235‑9649 · 172‑5780 · 188‑8739 · 217‑2570 · 235‑2888 · 236‑0962 · 10R‑7224

Cov no npog tag nrho cov kev tsim tawm ntawm C-9 lub cav los ntawm 1998 mus txog qhov kawg ntawm Tier 3 ntau lawm.

Thaum lub nozzle feem ntau pom tias yog ib qho khoom siv nyob ib leeg, nws qhov xwm txheej ncaj qha cuam tshuam rau lub siab-siab roj twj tso kua mis lub voj voog thiab lub solenoid qhov kub thiab txias. Lub qhov txhaws los yog eroded nozzle nce lub sijhawm txhaj tshuaj rau tib lub sijhawm kom muaj roj ntau, uas ua rau cov solenoid energized ntev dua, ua kom muaj cua sov ntxiv. Cov cua kub no hloov mus rau hauv lub cev lub cev thiab tuaj yeem ua kom nrawm nrawm ntawm lub swb valve thiab tswj valve. Conversely, ib tug tshiab, zoo ntws nozzle txo cov hluav taws xob load thiab hydraulic kev nyuaj siab, txhim kho tag nrho cov kev cia siab ntawm system. Qhov no holistic saib underscores yog vim li cas xaiv lub nozzle yog - tsis yog tus pheej yig tshaj - yog ib lub sij hawm ntev peev nyob rau hauv lub engine noj qab haus huv.

Q1: Kuv tuaj yeem qhia tau li cas yog tias kuv lub nozzle xav tau kev hloov pauv yam tsis tau rub lub injector?
Saib xyuas cov pa cua kub (EGT) ntawm tag nrho cov load thiab muab piv rau cov ntaub ntawv hauv paus. Lub nozzle nrog eroded orifices yuav txhaj cov tee loj, ua rau qeeb combustion thiab EGT nce ntawm 30-50 degree. Tsis tas li ntawd, mloog lub suab "knocking" ntawm qhov tsis ua haujlwm uas ploj mus thaum lub tog raj kheej raug txiav tawm - qhov no qhia tias tsis zoo atomization nyob rau hauv lub injector.

Q2: Kuv puas tuaj yeem ntxuav lub nozzle tsis hloov pauv?
Peb tsis pom zoo kom txhua yam khoom siv lossis tshuaj ntxuav. Lub orifice diameters yog ntsuas nyob rau hauv microns, thiab txawm ultrasonic tu tuaj yeem hloov cov ntug profile. Kev hloov pauv tsuas yog qhov kev lav phib xaub nkaus xwb, tshwj xeeb tshaj yog rau cov hloov pauv tom qab nrog cov coatings los tiv thaiv coatings uas yuav raug puas tsuaj los ntawm cov tshuaj ntxuav.

Q3: Puas muaj kev nyab xeeb los sib xyaw 172-5780 nozzle nrog 10R-7224 nozzles ntawm tib lub cav?
Kev sib xyaw cov chav sib txawv ua rau lub tog raj kheej-rau-lub tog raj kheej tsis sib xws uas ECM tsis tuaj yeem them rov qab rau tag nrho. Qhov tshwm sim yog kev xa hluav taws xob tsis sib xws, kev vibration nce ntxiv, thiab ua tsis tiav ntxov ntawm lub tog raj kheej siab dua vim muaj roj ntau dhau. Ib txwm hloov tag nrho rau nrog tib tus lej -zoo dua yog 10R-7224.

Q4: Puas yog 10R-7224 nozzle ua haujlwm nrog biodiesel sib tov txog B30?
Yog lawm, cov ntaub ntawv foob thiab cov nitrided nto yog sib xws nrog B30, tab sis peb qhia kom txo cov roj hloov lub sij hawm los ntawm 20% vim biodiesel nce roj dilution. Lub nozzle nws tus kheej yuav tsis raug corrosion los yog o, ua tsaug rau nws cov fluoropolymer O-rings thiab qib high-qib stainless hlau lub cev.

Q5: Ntau npaum li cas cov nozzles yuav tsum tau khiav-kuaj nyob rau hauv ib tug high-teev fleet daim ntawv thov?
Peb pom zoo kom muaj kev ntsuas dej ntws txhua txhua 3,000 teev rau cov tsheb thauj neeg ua haujlwm thiab txhua 2,000 teev rau kev siv dej hiav txwv lossis lub tshuab hluav taws xob. Qhov sib txawv ntawm ntau tshaj ± 3% los ntawm lub Hoobkas spec lav hloov. 10R-7224 feem ntau tswj nws cov dej ntws hauv ± 1.5% rau thawj 5,000 teev thaum siv roj huv.

Q6: Tus naj npawb 235-9649 yog ze heev rau 235-2888 - Dab tsi yog qhov txawv ntawm cov tshuaj tsuag?
Thaum ob qho tib si muaj 6-qhov tsim, 235-9649 nta 3-degree wider nrog lub kaum ntse ntse thiab ib qho loj me ntsis, uas txhim kho huab cua nkag mus rau hauv siab boost pressures. Lub 235-2888 muaj lub kaum ntse ntse, zoo dua rau kev siv qis-ceev, siab-torque. Rau feem ntau niaj hnub C-9 xyaw, 10R-7224 muab cov qauv sib npaug uas ua haujlwm zoo thoob plaws txhua qhov kev ua haujlwm.

 

Txhawm rau ua kom koj qhov kev yuav khoom tau yooj yim thiab yooj yim, peb muab ntau yam kev xaiv them nyiaj ruaj ntseg:

Peb nyob ntawm no los ua kom koj cov txheej txheem xaj kev txhawj xeeb-dawb - xaiv txoj kev them nyiaj uas ua haujlwm zoo tshaj rau koj!

 

 

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