WEIFU U709 / 00U709 Roj Txhaj Plunger - Coj-Flow Crown Rau Optimized Suction-Stroke Filling Dynamics

Hauv kev nrhiav kev txhaj tshuaj ntau dua, kev lag luam tau tsom mus yuav luag tshwj xeeb ntawm cov hlab ntsha compression - cov ntaub ntawv muaj zog, refining helix geometries, thiab txhim kho kev sib khi. Tseem tussuction stroke-theem qhov twg lub plunger nqis los rub cov roj rau hauv lub tshuab nqus tsev twj tso kua mis- yog qhov tseem ceeb sib npaug, tshwj xeeb tshaj yog nyob rau hauv lub cav ceev uas muaj lub sij hawm ntim tsawg tshaj plaws. Thaum lub plunger nqis los, roj yuav tsum ntws dhau lub crown thiab mus rau hauv lub expanding chamber. Lub crown lub geometry dictates npaum li cas qhov no inflow tshwm sim: ib tug ca los yog domed crown tsim ib tugFlow-constriction cheeb tsamuas txwv cov inflow ntawm siab plunger speeds, ua rau tsis tiav filling thiab txo volumetric efficiency. CovU709 / 00U709los ntawm WEIFU qhia acoj-flow crown-ib qho kev tsim qauv zoo nkauj nrog cov kab hluav taws xob radial ntws uas nquag coj cov roj tuaj, ua kom cov txheej txheem ntim thiab ua kom lub chamber tau them tag nrho txawm tias nce RPMs. Qhov no tsis yog qhov kev hloov pauv rau lub tshuab nqus dej twj tso kua mis; nws yog ib tug optimization ntawm lubnoj theemuas txhim kho lub twj tso kua mis tag nrho volumetric efficiency txog li 5%.

U709 nta ib lub kaus mom nrog aCentral kev nyuaj siab(0.15 hli sib sib zog nqus) txuas nrogpeb radial flow channel(0.2 hli sib sib zog nqus, 0.5 hli dav, spaced 120℃sib nrug) uas txuas mus rau sab nraud txoj kab uas hla. Raws li lub plunger nqis, roj yog kos rau hauv nruab nrab kev nyuaj siab thiab tom qab ntawd coj mus rau sab nraud los ntawm cov channel, tsim kom muaj ib qhosmooth, low-turbulence flow pathuas xa cov roj ncaj qha mus rau lub expanding chamber nrog tsawg kuj. Computational Fluid Dynamics (CFD) simulations qhia tau hais tias qhov kev taw qhia-kwj tsim no txo ​​qhov kev poob siab thoob plaws lub kaus mom thaum lub sij hawm nqus stroke los ntawm 35%, tso cai rau ntau roj nkag mus rau hauv chamber -tshwj xeeb tshaj yog nyob rau hauv high speeds uas inflow kuj yog feem ntau txwv.

Measured filling-efficiency cov txiaj ntsig:

Volumetric efficiency @ 2,200 rpm: nce ntawm 92% mus rau97% – a 5.4% kev txhim kho

Lub siab poob thoob plaws lub kaus mom (suction stroke, 2,000 rpm): txo los ntawm 0.8 bar rau0.5bar ua – a 37% txo

Chamber filling lub sij hawm (mus txog 90% ntawm theoretical sau): txo los ntawm18%ntawm 2,000 rpm

Pump tso zis stability ntawm kev kub ceev: txhim kho los ntawm ± 2.5% mus rau±1.2%

Kev xa roj ntawm kev kub ceev (siab tshaj 2,000 rpm): nce los ntawm4.2%- ua kom muaj zog dua yam tsis tas yuav tsum tau txhaj tshuaj ntxiv

Dimensional Parameters:

Plunger txoj kab uas hla:10.5 hli(IT4, roundness Tsawg dua lossis sib npaug ntawm 0.8 μm) - lub hom phiajcompact-rau- nruab nrabcav (2.5-4.5 litres)

Ua haujlwm stroke:13.0mm 3

Crown depression: 0.15 hli tob, 3.0 hli txoj kab uas hla (ntawm qhov chaw)

Flow channels: 3 × radial channels, 0.2 hli tob × 0.5 hli dav, 120℃sib nrug

Channel sib xyaw: 0.1 hli vojvoog ntawm txhua qhov kev hloov pauv kom tsis txhob ntws sib cais

Helix: ib leeg-lead, sab laug-tes, tus qauv kev nce qib

Maximum rail siab:1,800 ib (burst >2,100 bar)

Internal to @ 1,400 bar:6.2 ml / min- tsis cuam tshuam los ntawm lub crown tsim

U709 yog forged los ntawm achromium-molybdenum-vanadium hlau(DIN 1.2367), carburised rau 0.55 hli (62 - 64 HRC). Lub crown kev nyuaj siab thiab radial channel yog machined siv a5-axis CNC grinder nrog pob zeb diamond-tipped daim ntawv cov cuab yeej, ua tiav qhov tob ntawm qhov siab ntawm ± 0.005 hli thiab nto tiav ntawm Ra 0.020 μm. Qhov sib xyaw radii yog polished los xyuas kom meej qhov kev hloov pauv. Txhua lub plunger raug tshuaj xyuas nrog aTom ntej: 3D Contour Profileometeruas txheeb xyuas qhov kev nyuaj siab qhov tob, qhov ntev channel, thiab sib xyaw radii; deviations dhau qhov kam rau ua ua rau tsis lees paub.

U709 yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig rau cov cav uas ua haujlwm thoob plaws ntau qhov ceev -tshwj xeeb yog cov uas nquag ncav cuag siab RPMs qhov twg suction-stroke filling yuav txwv:

TSI HP 3.5thiabHP 4- siv nyob rau hauv 2.5 - 4.5-liter tsheb neeg nrog caij thiab lub teeb coj mus muag diesel xyaw

Bosch CP1thiabCP 3- Haum rau BMW 2.0d, Ford 2.0 TDCI, PSA 2.2 HDi, thiab Volkswagen EA288

Denso HP 3- tam sim no hauv Toyota, Nissan, thiab Mazda diesel qauv

QR-linked compatibility cuab tam (ntawm lub thawv) paub meej tias haum los ntawm lub twj tso kua mis qauv, kom ntseeg tau tias cov coj-flow crown yog raug matched.

Ntawm lub ntim ntim, peb muab avelocity-vector kev sib pivqhia cov roj ntws thaum lub sij hawm nqus cov hlab ntsha: U709's radial channels tsim ib qho yooj yim, taw qhia ntws (xub xub), thaum lub tiaj tus yas qhia tau hais tias chaotic, recirculating flow (xub xub liab). Daim duab kos tau piav qhia nrog "Guided Flow" thiab "Un-Guided Flow" zones. Tsis tas li ntawd, txhua lub plunger nqa alaser-engraved channel cim(peb cov kab hluav taws xob) ntawm nws lub kaus mom, qhia txog tus qauv coj-khiav.

Q1:Vim li cas lub tshuab nqus plua plav tseem ceeb - tsis yog lub twj tso kua mis tsuas yog sau cia?
A:Ntawm qhov qis qis, lub tshuab nqus tsev nqus tau ntev txaus rau kev ntim puv. Nyob rau hauv high speeds, lub sij hawm muaj yog luv, thiab ntws tsis kam ntawm lub crown ua ib qho tseem ceeb txwv. Yog tias lub chamber tsis puv puv, lub twj tso kua mis xa cov roj tsawg dua li qhov xav tau, cuam tshuam rau lub zog thiab emissions.

Q2:Yuav ua li cas cov radial channel txhim kho kev sau- tsis yog lawv tsuas yog tsim kom muaj kev kub ntxhov ntxiv?
A:Cov channel yog tsim los coj cov kev khiav dej num, txo cov kev kub ntxhov los ntawm kev muab cov kev taw qhia rau cov roj. Qhov kev hloov pauv tau yooj yim thiab qhov tob tob kom ntseeg tau tias cov dej ntws tseem nyob laminar, txo cov kev poob siab uas yuav tshwm sim.

Q3:U709 puas muaj feem cuam tshuam rau kev xa roj ntawm qhov ceev ceev -nws puas hloov qhov ntsuas ntsuas?
A:Ntawm qhov nrawm qis, kev ua tiav tiav lawm, yog li U709 tsis muaj qhov sib txawv. Cov txiaj ntsig yog feem ntau ntawm kev kub ceev. Lub plunger yog qhov hloov pauv ncaj qha rau tus qauv plunger, yog li tsis muaj kev hloov pauv yuav tsum tau ua - qhov kev txhim kho yog kev siv tshuab nkaus xwb.

Q4:Puas yog U709 haum rau cov cav nrog lub nrawm nrawm (piv txwv li, gensets) qhov kev kub ceev tsis yog qhov teeb meem?
A:U709 yog qhov muaj txiaj ntsig zoo tshaj plaws rau cov cav tsheb sib txawv. Rau cov ntawv thov ceev ceev, cov txiaj ntsig tsawg tsawg, thiab tus qauv plunger yuav txaus. Peb cov cuab yeej sib raug zoo tuaj yeem pab txiav txim siab yog tias U709 yog qhov kev xaiv zoo rau koj daim ntawv thov.

Q5:Kuv tuaj yeem tshawb xyuas cov dej ntws li cas thaum lub sijhawm tu?
A:Tshem lub plunger thiab tshuaj xyuas cov kab yas hauv qab lub iav tsom iav- lawv yuav tsum huv thiab tsis muaj cov khib nyiab. Peb muab ib daim duab siv rau ntawm lub thawv. Yog hais tias cov channel raug thaiv, maj mam ntxuav nrog ib tug nplua hlau (0.2 hli inch) thiab yaug nrog diesel.

Q6:Puas yog U709 hloov lub U989 (siv-flow cone) los yog lawv ntxiv?
A:Lub U989 optimizes cov dej ntws ntawm lub crown sab nrauv, thaum U709 siv radial raws coj los ntawm qhov chaw. Lawv daws qhov teeb meem tib yam los ntawm ntau lub kaum ntse ntse. Rau qhov ua tau zoo tshaj plaws ntawm txhua qhov nrawm, lawv tuaj yeem siv ua ke hauv kev tsim qauv, tab sis raws li cov khoom lag luam qauv lawv yog lwm txoj hauv kev - xaiv U989 rau ntug-flow optimization thiab U709 rau nruab nrab-directed flow.