CAT C15 Injector Nozzle - Spray Geometry Thiab Flow Coefficient Rau Optimized Combustion

 

Es tsis txhob saib lub injector nozzle raws li ib tug passive roj passage, xav txog nws ib tug nquag "spray-shaping orifice" uas hloov hydraulic siab mus rau hauv kinetic zog nrog ib tug tshwj xeeb droplet loj tis. Rau lub CAT C15 platform-txawm yog nruab nrog HEUI lossis tom qab sib xyaw ua ke XPI-style txhaj tshuaj- lub nozzle's metering orifices dictate cov cua-roj sib tov tus nqi, uas nyob rau hauv lem tswj lub tshav kub tso tawm tus nqi thiab soot tsim. Kev hloov pauv ntawm 0.02 hli nyob rau hauv txoj kab uas hla ntawm orifice hloov cov roj nkag los ntawm ze li ntawm 8%, thaum lub 2℃variation nyob rau hauv cov tshuaj tsuag lub khob lub kaum sab xis txav cov nplaim taws pem hauv ntej deb ntawm lub piston tais phab ntsa, pheej hmoo rau thermal puas rau lub tog raj kheej liner. Yog li, C15 nozzle tsis yog ib qho kev hloov pauv tau; Nws yog calibrated flow restrictor engineered kom phim lub piston tais geometry thiab lub turbocharger boost profile.

 

Qhov no injector nozzle yog precision-av los ua qhov ncaj qha hydraulic interface rau cov nram qab no CAT C15 roj injector sib dhos, spanning HEUI thiab ntau-rail tiam:

Injector P / N	Injector P / N	Injector P / N	Injector P / N
191‑3003	10R‑8501	211‑3027	244‑7716
272‑0630	10R‑7229	10R‑0957	200‑1117
229‑5919	10R‑1000	249‑0709	10R‑9236
10R‑1273	280‑0574	10R‑8989	211‑3023
234‑1400	253‑0614	10R‑3263	289‑0753
10R‑0958	211‑3022	10R‑0956	235‑1400
253‑0615	355‑6110	20R‑8047	10R‑3264
211‑3024	10R‑8502	235‑1401	253‑0617
374‑0750	20R‑2284	211‑3025	10R‑0955
239‑4909	254‑4183	618‑0750	–

Txhua lub npe injector sib koom tib lub nozzle retention thread (M20 × 1.0) thiab tib rab koob qhia txoj kab uas hla ntawm Ø5.98 mm, kom ntseeg tau tias poob-hauv kev sib raug zoo. Lub nozzle lub sealing lub khob hliav qab yog tuav mus rau 59℃± 0.5 degree, piv rau tus thawj CAT specification kom muaj tib lub hydraulic clamping quab yuam ntawm lub rooj zaum koob. Qhov kev qhia dav dav no suav nrog koj cov khoom muag-txawm tias koj tab tom ua haujlwm rau 3406E- muab los ntawm C15 lossis tom qab Acert common-rail version, ib lub taub hau SKU npog tag nrho.

 

Lub taub hau nozzle suav nrog axya holetsim nrog orifice txoj kab uas hla ntawm0.285 hli(nominal) thiab asuav nrog lub kaum sab xis ntawm 152 degree. Qhov no geometry yog muab los ntawm kev suav cov kua dej dynamics (CFD) simulations uas optimize cov roj dav hlau sib cuam tshuam nrog CAT C15 lub re-entrant piston tais. Ntawm qhov ntsuas kev txhaj tshuaj siab ntawm 2,100 bar (common-rail) lossis 1,600 bar (HEUI), lub nozzle xa cov dej coefficient (Cd) ntawm 0.78 ± 0.02, ntsuas ntawm 100 bar sib txawv siab siv ISO 4113 calibration roj. Ib qho qis Cd (piv txwv li, 0.72) qhia tias burrs lossis carbon deposits nyob rau hauv lub orifice nkag, uas txo cov kev txhaj tshuaj npaum li cas los ntawm kwv yees li 5% thiab lengthen lub sij hawm txhaj tshuaj, ncaj qha nce tso pa kub ntawm 15-20℃nyob rau hauv tag nrho load.

CovK-factor(qhov sib piv ntawm lub qhov nkag ntawm qhov nkag mus rau qhov hluav taws xob txoj kab uas hla) rau qhov nozzle yog 1.5, lub ntsiab lus ntawm qhov nkag yog me ntsis loj dua qhov tawm. Qhov taper no tsim cov nyhuv throttling uas suppresses cavitation nyob rau hauv lub orifice ntawm kev kub siab tee - tseem ceeb vim cavitation npuas vau ze ntawm lub qhov dej tawm, eroding lub hardened steel thiab loj lub qhov nyob rau hauv lub sij hawm. Piv nrog rau lub taub hau ncaj (K=1.0), K-factor 1.5 txo qhov kev siv cavitation los ntawm 38%, ncua lub nozzle ruaj khov lub neej ntawm kwv yees li 4,000 teev mus rau ntau dua 7,000 teev hauv daim ntawv thov nrog ultra-low-sulfur diesel.

 

Lub cev nozzle yog forged los ntawmX45CrSiV3cuab yeej steel, hardened rau62 HRCntawm lub rooj zaum lub ntsej muag thiab lub phaj orifice. Qhov hardness no yog qhov tseem ceeb los tiv thaiv kev sib koom ua ke ntawm rab koob hammering (txog 20 lab lub voj voog ib teev) thiab lub dav hlau siab tshaj plaws roj (nce txog 520 m / s ntawm qhov chaw tawm). Ntxiv rau, achromium-nitride txheej(0.3 μm tuab) yog siv los ntawm lub cev vapor deposition mus rau sab hauv cov phab ntsa. Cov txheej no txo ​​cov adhesion ntawm cov roj av tshauv thiab asphaltenes, txo qhov tshwm sim ntawm nozzle coking- hom tsis ua hauj lwm uas cov deposits ib nrab thaiv cov orifices, ua rau lub tog raj kheej tsis sib npaug.

Kev tswj cua sov yog qhov tseem ceeb sib npaug: lub taub hau lub taub hau ua haujlwm ntawm 400-500℃hauv qab lub tog raj kheej siab siab, thaum cov roj hauv lub koob chamber yog nyob ntawm 80-90 degree. Qhov kub gradient no ua rau muaj kev ntxhov siab ntawm kwv yees li 280 MPa ntawm lub nplhaib lub rooj zaum, uas tuaj yeem ua rau cov yas deformation microscopic yog tias cov khoom tsis txaus. Peb lub nozzle undergoes akev kho mob sub-zero(–80℃rau 2 teev) tom qab quenching, uas converts khaws cia austenite rau martensite, stabilizing qhov ntev thiab txo cov thermal expansion coefficient los ntawm 12.2 × 10⁻⁶ mus rau 11.6 × 10⁻⁶ ib degree, yog li tuav lub pre-set 530 mm nqa tag nrho (0. ntau.

 

Q1: Kuv tuaj yeem qhia tau li cas seb lub nozzle hauv kuv C15 injector yog hom SAC lossis VCO, thiab qhov twg cov khoom no hloov?
C15 siv aSAC(summit-and-chamber) nozzle tsim, qhov twg rab koob nqa tawm ntawm lub rooj zaum kheej kheej thiab cov roj tawm ntawm lub hnab ntim. Peb lub nozzle replicates tus thawj SAC geometry nrog lub hnab txoj kab uas hla ntawm 1.2 hli. Lwm qhov VCO (valve-covered-orifice) tsim tsis siv rau C15 vim nws qhov qis qis qis ntawm kev kub siab.

Q2: Dab tsi yog thawj cov tsos mob ntawm lub taub hau txhaws, thiab kuv puas tuaj yeem ntxuav nws es tsis txhob hloov nws?
Cov orifices txhaws ua rau muaj qhov tsis xis nyob, ua rau muaj pa taws ntau ntxiv, thiab txo lub zog kom pom tseeb - feem ntau nrog lub suab "cackle" los ntawm kev sib tsoo. Ultrasonic tu tuaj yeem tshem tawm cov pa roj carbon ib ntus, tab sis yog tias cov npoo ntawm lub qhov ncauj yog qhov sib npaug (tso pom zoo los ntawm qhov ntsuas qhov ntse-ntug qhov ntsuas), qhov coefficient ntws mus tas li degraded. Kev hloov pauv tau pom zoo, vim tias rov ua dua lossis rov ua dua tsis tuaj yeem ua tsis tau yam tsis muaj cov cuab yeej tshwj xeeb.

Q3: Puas siv biodiesel (B20) cuam tshuam qhov nozzle txawv dua li cov qauv diesel?
B20 has higher density and slightly lower compressibility, which increases the effective injection pressure by about 2 % at the same commanded duration. Txawm li cas los xij, qhov kev txhawj xeeb tseem ceeb yog qhov kev xav ntau dua rau kev tso nyiaj rau ntawm lub phaj orifice. Peb cov txheej txheem chromium-nitride txo qhov no, tab sis peb pom zoo kom luv luv xyuas lub sijhawm (txhua 500 teev) thaum khiav B20 tsis tu ncua.

Q4: Lub nozzle raug ntsuas rau 2,100 bar-Kuv puas tuaj yeem siv nws ntawm C15 qub nrog 1,600 bar system?
kiag li. Kev ntsuas siab dua tsis ua rau lub siab qis dua; nws tsuas muab ib qho kev nyab xeeb ntxiv. Txawm li cas los xij, cov tshuaj tsuag nkag mus yuav qis dua me ntsis ntawm 1,600 bar, yog li lub sijhawm txhaj tshuaj yuav xav tau rov ua dua los ntawm ECM kom tswj tau cov roj tib yam.

Q5: Kuv lub tshuab txhaj tshuaj muaj tus lej sib txawv uas tsis tau teev nyob rau hauv lub rooj sib raug zoo -Kuv puas tuaj yeem siv lub nozzle?
Daim ntawv teev kev sib raug zoo suav nrog C15 injectors feem ntau. Yog tias koj tus lej tsis tau teev tseg, xyuas cov xov nozzle thiab rab koob qhia txoj kab uas hla - yog tias lawv phim (M20x1.0 thiab Ø5.98 mm), nws yog qhov sib hloov tau, tab sis peb xav qhia rau kev sab laj thawj injector calibration cov ntaub ntawv kom paub meej tias lub qhov suav thiab lub kaum sab xis yog zoo tib yam, raws li qhov sib txawv tuaj yeem hloov tau.

Q6: Muaj pes tsawg teev ntawm kev pab cuam lub neej kuv tuaj yeem xav tau los ntawm lub nozzle raws li cov xwm txheej mining?
Raws li kev xa rov qab los ntawm Australian thiab North American mining fleets, qhov nruab nrab hloov lub sij hawm yog 6,800 teev rau cov qauv sulfur fuels thiab 5,500 teev rau high-sulfur lossis high-ash fuels. Kev hloov pauv roj tsis tu ncua (txhua 250 teev) tuaj yeem txuas ntxiv qhov no mus txog 15% los ntawm kev tiv thaiv cov khoom abrasive los ntawm eroding lub orifices.

 

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!

 

 

Cim npe nrov: miv c15 injector nozzle - tsuag geometry thiab ntws coefficient rau optimized combustion, Tuam Tshoj miv c15 injector nozzle - tsuag geometry thiab txaus coefficient rau optimized combustion manufacturers, lwm tus neeg, Hoobkas