294180-0080 High-Pressure Pump Plunger & Barrel Assembly - Micro-Finish Matched Teeb Nrog Tswj Diametral Clearance

Nyob rau hauv high-pressure common rail twj, lub plunger thiab chim tsim ametering khubqhov twg lub diametral clearance (feem ntau 2-4 μm) tswj ob qho tib si volumetric efficiency thiab sab hauv to. Hloov tsuas yog lub plunger thaum khaws cov khoom qub - lossis rov ua dua - yuav luag ib txwm ua rau muaj qhov tso tawm ntau dhau (yog tias tshem tawm ntau dua 6 μm) lossis qaug dab peg (yog tias tshem tawm qis dua 1.5 μm vim thermal expansion mismatch). Cov294180-0080 Plunger & Barrel Assemblyyog muab raws li ib tugHoobkas-muab teeb, lapped ua ke kom ua tiav kev tswj kev tshem tawm ntawm 3.0 ± 0.5 μm ntawm 20℃. Qhov no ua kom ntseeg tau tias lub twj tso kua mis tus nqi xa khoom tseem nyob hauv 2% ntawm OEM calibration, tshem tawm qhov kev sim-thiab-kev ua yuam kev ntawm kev sib xyaw siv thiab cov khoom tshiab.

Chaw tsim tshuaj paus	Pump / System	Original Part Number	Daim ntawv thov
Denso	HP0, HP4, HP5	294180‑0080	Isuzu 6HK1, Hino J08E, Foton X11/X13
Denso	HP4 (Euro 5/6)	294180‑0080	Volvo D13, Mack MP8, DAF MX-13
Bosch (kev sib txuas lus)	CPN 2.2, CP3.3	0 928 400 723 (lwm yam)	Ford, PSA, GM hnyav-duty

Lub rooj sib txoos yog ahloov ncaj qharau tus thawj Denso ib feem, nrog zoo tib yam plunger txoj kab uas hla (12.0 hli), stroke ntev (28.0 hli), thiab chim mounting flange qhov ntev. Nws kuj tseem siv tau rau hauv qee yam Bosch CPN2.2 twj tso kua mis uas lub rooj sib txoos Denso tau teev tseg raws li kev pabcuam hloov.

1. Tswj kev tshem tawm nrog Thermal Compensation Factor

Qhov sib npaug sib npaug yog xam tsis yog rau chav tsev kub xwb tab sis kuj rau lub twj tso kua mis qhov kub thiab txias (≈80-100 degree). Ntawm 100 degree, aluminium vaj tsev nthuav dav ntau dua li cov hlau plunger / chim, nce qhov kev tshem tawm zoo li ntawm 0.8 μm. 294180-0080 teeb yog tsim los kom cov kub clearance ntog nyob rau hauv 3.5-4.5 μm - lubqab zibqhov twg los yog txo kom tsawg yam tsis muaj kev pheej hmoo ntawm scuffing. Qhov no tau txheeb xyuas los ntawm kev ntsuas cua sov los ntawm 20℃mus rau 120 degree, nrog kev tshem tawm ntawm txhua lub sijhawm 20 degree.

2. Anti-Wear Helical Oil Grooves

Tsis zoo li cov cylindrical plungers, qhov sib dhos no ntamicro-helical grooves(0.3 hli dav, 0.05 hli qhov tob) ntawm lub plunger lub siab-relief seem. Cov grooves no ua raws li hydrodynamic bearings, ntxiab ib zaj duab xis ntawm cov roj compression uas txhawb lub plunger tom qab thaum lub sij hawm high-speed reciprocation. Qhov no txo ​​qis sab-load hnav ntawm lub thoob khib nyiab - ib qho kev ua haujlwm tsis zoo hauv cov twj tso kua mis ua haujlwm siab RPM - thiab txuas ntxiv lub teeb lub neej kev pab cuam los ntawm kwv yees li 30% piv rau cov qauv uas tsis yog-grooved.

3. Matched Surface Texture – Plateau Honing

Lub pob bore yogplateau-honedlos tsim ib qho chaw nrog thaj tsam siab (≈90%) thaum tuav lub hav tob (Rvk ≈0.5 μm) rau kev khaws roj. Lub plunger yog superfinished rau daim iav zoo li qhov chaw (Ra 0.04 μm). Qhov kev sib xyaw no muab ib qhoqis pib khiav-hauv hnav- cov txheej txheem nce mus txog qhov kev ua haujlwm ruaj khov nyob rau hauv thawj 30 feeb ntawm kev ua haujlwm, tsis yog lub sijhawm 100-teev khiav-hauv lub sijhawm xav tau rau cov khoom tsis sib xws. Lub honing lub kaum sab xis yog teem rau ntawm 45℃kom optimize lub lubricating zaj duab xis thaum lub sij hawm compression thiab suction strokes.

Kev sim ua los ntawm Bosch-calibrated twj tso kua mis xeem lub rooj ntev zaum (1,800 RPM, 160 MPa rail siab):

Volumetric efficiency: 92.5% (txheej txheem tshiab) - tseem nyob saum 90% tom qab 500 teev ntawm kev ntsuas nrawm.

Sab hauv to: 0.8 mL / min ntawm 160 MPa - zoo nyob rau hauv Denso qhov kev txwv ntawm 2.0 mL / min.

Scuffing kuj: Zero cov cim qhia ntawm galling tom qab 1,000 thermal voj voog (20℃→ 120℃→ 20℃).

Flow stability: Pump xa variation hla 6 plungers (tag nrho teeb) yog ± 1.2%, hauv qab OEM kam rau ua ntawm ± 2.5%.

Cov ntaub ntawv ywj pheej los ntawm 15 lub tsheb thauj khoom hnyav (nruab nrab 600,000 km) qhia tias tsis muaj cov twj tso kua mis degradation vim yog lub plunger / chim tau teem rau 18 lub hlis - qhov kev txhim kho tseem ceeb ntawm kev hloov pauv.

Q1: Cov tsos mob dab tsi qhia tau tias lub plunger & chim sib dhos xav tau hloov?
Cov cim qhia muaj xws li: (1) txo cov tsheb ciav hlau siab ntawm kev thauj khoom siab txawm tias muaj kev ua haujlwm SCV, (2) nce twj tso kua mis rov qab ntws (kua pa) dhau qhov kev pabcuam txwv, (3) hloov pauv roj siab uas tsis tuaj yeem kho los ntawm ECU, thiab (4) lub suab hu ua metallic 'chatting' suab los ntawm lub twj tso kua mis ntawm idle - qhia tias plunger slap vim kev tshem tawm ntau dhau.

Q2: Kuv puas tuaj yeem rov siv lub thoob qub nrog lub plunger tshiab los ntawm cov txheej txheem sib txawv?
Peb tawm tswv yim tawm tsam nws. Qhov kev tshem tawm ntawm lub plunger thiab chim yog sib npaug rau hauv ± 0.5 μm. Reusing ib lub thoob hnav nrog lub plunger tshiab yuav ua rau muaj kev xau ntau dhau (yog tias lub thoob loj dhau) lossis qaug dab peg (yog tias nws tsis loj). Qhov no yog qhov feem ntau ua rau lub twj tso kua mis ntxov ntxov tom qab rov tsim dua.

Q3: Cov txheej txheem no txawv li cas los ntawm kev hloov pauv tom qab muag?
Qhov sib txawv tseem ceeb yog: (1) sib txuam clearance nrog thermal them nyiaj, (2) helical roj grooves rau txo hnav, (3) plateau-honed chim nto rau khiav ceev, thiab (4) tag nrho traceability nrog ib tug neeg clearance ntsuas. Cov txheej txheem dav dav feem ntau muaj qhov dav dav dav (± 2 μm) thiab tsis muaj cov yam ntxwv tiv thaiv hnav, ua rau lub neej ua haujlwm luv dua.

Q4: Puas yog cov txheej txheem no siv tau nrog biofuels (B20-B100) lossis qis-sulphur diesel?
Yog - ob qho tib si cov khoom siv plunger thiab lub thoob yog corrosion-resistant tiv thaiv biodiesel blends thiab qis-sulfur fuels. Lub thoob ntim nitrided muab kev tiv thaiv ntxiv rau cov khoom abrasive uas yuav dhau los ntawm cov lim roj. Txawm li cas los xij, cov txheej txheem tsis pom zoo rau cov dej-cov ntsiab lus emulsions.

Q5: Lub sijhawm hloov pauv tau pom zoo rau cov teeb no yog dab tsi?
Hauv kev pabcuam ib txwm muaj (cov roj huv, hloov pauv tsis tu ncua), lub teeb yuav tsum ua kom lub neej ntev ntawm lub twj tso kua mis - feem ntau 800,000-1,200,000 km rau cov tsheb thauj khoom loj. Peb pom zoo kom ntsuas lub twj tso kua mis rov qab ntws ntawm txhua qhov kev pabcuam loj; Yog tias nws tshaj 2.5 mL / min (rau cov qauv twj tso kua mis), xav txog kev hloov.

Q6: Yuav ua li cas lub teeb yuav khaws cia yog tias tsis siv tam sim?
Khaws lub plunger thiab chim sib dhos (tsis txhob sib cais). Khaws rau hauv lub hnab los tiv thaiv corrosion, nrog lub teeb txheej ntawm cov roj khaws cia (tso rau ntawm lub hoobkas). Lub teeb muaj lub neej txee ntawm 3 xyoos thaum khaws cia hauv qhov chaw txias, qhuav (10-30 degree).

 

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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