00U640 / U640 Roj Txhaj Plunger - Siab -Faquency Fatigue Resistance Thiab Subsurface Stress Distribution For Extended Pump Overhaul Intervals

Hauv kev sib xyaw- cov twj siv hluav taws xob tsheb ciav hlau, qhov pom kev ua haujlwm tsis ua haujlwm-scuffing, scoring, thiab leakage- feem ntau yog theem kawg ntawm cov txheej txheem uas pibhauv qab ntawm qhov chaw, qhov twg cyclic loading los ntawm camshaft generatesqaug zog micro- tawguas maj propagated rau saum npoo. Cov00U640 / U640los ntawm Weifu yog engineered nrog ibsubsurface stress optimization zoouas hais txog qhov no zais tsis ua haujlwm hom, txuas ntxiv lub neej ua haujlwm ntawm lub plunger tshaj li 10,000-teev cim uas yog qhov zoo rau cov qauv txheej txheem. Los ntawm kev sib xyaw ua ketua peeningthiabtob -rollingcov txheej txheem siv rau lub plunger qhov kev ntxhov siab- thaj chaw tseem ceeb (lub vojvoog fillet thiab kev hloov pauv ntawm ntug), 00U640 ua tiavcompressive residual stress txheejntawm −450 MPa ntawm 0.3 mm qhov tob-50% siab dua li ntawm −300 MPa pom nyob rau hauv conventionally kho plungers. Cov txheej txheem compressive no ntes qhov pib tawg ntawm cov ciam teb, zoo dua ob npaugsiab -lub neej qaug zoglos ntawm 10⁷ mus rau 2 × 10⁷ cycles ntawm 1,800 bar ncov siab. Lub plunger lub nominal txoj kab uas hla ntawm10.0 hlithiab stroke ntawm15.0mm 3muab tso rau hauv tib chav kawm loj li 00U635, tab sis nrog qhov sib txawvkev nyuaj siab faib profileuas ua rau nws tshwj xeeb tshaj yog haum rausiab -ceev muaj cav(2, 500+ rpm) thiabgenerator teebuas ua haujlwm tsis tu ncua ntawm 80-100% load, qhov kev qaug zog yog qhov tseem ceeb tsis ua haujlwm.

Lub 00U640 / U640 plunger qhov kev ncaj ncees saum npoo yog ua tiav los ntawmdual{0}}theem kho tshuab:ib ,atua peeningnrog 0.3 hli hlau txhaj tshuaj ntawm 8 Almen siv kom induce compressive kev nyuaj siab nyob rau hauv txheej txheej 0.15 hli; ob, atob -rollingtxheej txheem uas siv 200 N radial quab yuam rau lub plunger cov lus qhia saum npoo, tsim ibua haujlwm- txheej tawvnrog rau qhov tob ntawm 0.5 hli thiab hardness nce ntawm 12% (los ntawm 58 mus rau 65 HRC ntawm qhov chaw). Finite element tsom xam (FEA) ntawm qhov kev ntxhov siab faib nyob rau hauv 1,800 bar cyclic loading qhia tau hais tias qhov siab tshaj plaws von Mises kev ntxhov siab ntawm kev tswj ntug fillet yog txo los ntawm 620 MPa (tus qauv plunger) mus rau 490 MPa- txo 21% uas txav qhov kev ntxhov siab hauv qab qhov kev txwv ntawm 20MnCr5 khoom. Hauv kev sim ua kom qaug zog (1,800 bar, 2,000 rpm, 10 Hz cyclic tus nqi), 00U640 tau qhiatsis muaj detectable tawg tsimtom qab 10⁷ cycles, whereas standard plungers pom micro-kawg (ntev> 20 µm) ntawm 6 × 10⁶ cycles. Lub plungertswj ntugyog ib qho -helix tsim nrog lub kaum sab xis 32 degree, thiab nws nqa ibib leeg grey identification bandntawm lub tes tsho tswj, paub qhov txawv ntawm 00U635's tsis muaj-band thiab 00U502's ob- bands dub.

Lub plunger teeb no hloov cov lej OEM00U640, U640, thiab Bosch code 9 445 220 525. Nws yog feem ntau teev rautxuas ntxiv - daim ntawv thov haujlwmqhov twg qaug zog lub neej yog qhov tseem ceeb ntawm kev ntsuas kev ua tau zoo, suav nrogmarine propulsion cav(Cummins QSL9, Volvo Penta D8),locomotive zog units(MTU 4000 series), thiabchaw nres tsheb generator teeb(Caterpillar 3500 series). 00U640's enhanced fatigue resistance kuj ua rau nws nyiam xaiv rausiab -cov neeg caij nkoj ceev ceevthiabThaum muaj xwm ceev standby generatorsqhov twg kev ntseeg siab thaum lub sij hawm xav tau siab tshaj yog tsis yog -negotiable. Lub plungercoj ntevyog 24.5 hli-0.5 hli ntev tshaj li 00U635-los muab cov kabmob ntxiv thiab txo lub sijhawm khoov ntawm lub plunger lub hauv paus. Lub thoobsab nraud txoj kab uas hlayog 28.0 hli, thiab mounting flange siv aplaub -bolt qauvzoo ib yam li 00U502, tso cai rau kev teeb tsa ncaj qha yam tsis muaj kev hloov kho vaj tse. Lub plungerua ntej - mob strokespecification yog 1.7 hli ± 0.02 hli, uas yog 0.1 hli luv dua lub 00U635, ua kom ceev ceev tsim- nce rau siab - khiav ceev.

Txhim kho lub 00U640 yuav tsum tautshwj xeeb tuavtxhawm rau khaws cia qhov induced compressive kev nyuaj siab txheej. Lub plunger yuav tsum tau muab cia rau hauv nws cov ntaub thaiv npog kom txog thaum tam sim ntawd ua ntej kev teeb tsa, thiab kev sib cuag nrog cov cuab yeej hlau (tshwj xeeb tshaj yog nyob rau ntawm ntug kev tswj hwm) yuav tsum zam, vim tias qhov cuam tshuam tuaj yeem txo qhov kev ntxhov siab hauv zos thiab tsim kom muaj kev ntxhov siab. Txoj kev pom zoo siv txoj kev siv asoft nylon phau ntawv qhiauas tsis mar lub peened nto. Torque lub twj tso kua mis taub hau bolts rau58 N·mnyob rau hauv ib tug ntoo khaub lig qauv, ua raws li los ntawm75℃angular zawm- qhov siab dua qhov angular torque piv rau 00U635 (70 degree) yog kom ntseeg tau tias cov clamping zoo ib yam uas tsis cuam tshuam lub thoob, uas tuaj yeem tsim kev ntxhov siab hauv lub plunger. Tom qab sib sau ua ke, ua akev qaug zog rhiab heevlos ntawm kev khiav lub twj tso kua mis ntawm 2,000 rpm thiab 1,800 bar rau 30 feeb, tom qab ntawd xyuas lub plunger tswj ntug nrog 20 × magnifier rau txhua qhov pom micro- tawg. Yog tias pom muaj kab nrib pleb, lub twj tso kua mis vaj tsev yuav muaj ntau dhau (ntau tshaj 0.03 mm) uas yog overloading lub plunger - ntsuas thiab kho cov vaj tse nyob sib npaug.

Ib qho tsis yog - qhov taw qhia kev puas tsuaj ntawm 00U640 tus mob qaug zog yog qhovPump's acoustic kos npentawm 1,800 bar thiab 1,800 rpm. Siv lub vibration sensor (accelerometer) txuas rau lub taub hau lub twj tso kua mis, lub plunger noj qab haus huv ua rau azaus spectrum nrog lub ncov tseem ceeb ntawm 2.8 kHzthiab harmonics ntawm 5.6 kHz thiab 8.4 kHz. Yog hais tias qhov kev sib haum xeeb amplitude nce ntau dua 3 dB, nws qhia tau tias micro- tawg yog tsim, hloov lub ntuj zaus ntawm lub plunger. Rau kev cob qhia tsis muaj cov khoom siv acoustic, lubSCV tam sim no stabilityntawm 1,600 bar yog qhov ua tau zoo: 00U640 tshiab yuav tsum qhia qhov sib txawv tam sim no tsawg dua ± 3 mA nyob rau lub sijhawm 10-feeb. Yog hais tias qhov sib txawv tshaj ± 8 mA, nws qhia tau hais tias kev qaug zog subsurface yog ua rau lub plunger khi intermittently. Peb pom zoo ibqaug zog soj ntsuamtxhua 4,000 xuab moos rau kev ua haujlwm tas mus li- daim ntawv thov kev ua haujlwm, siv cov tshuaj pleev xim rau ntawm lub plunger lub vojvoog fillet.

Q1: Dab tsi yog qhov tseem ceeb ntawm 00U640's qaug zog tiv thaiv rau lub cav marine uas khiav 24/7?
Hauv kev ua haujlwm tas mus li - lub luag haujlwm, lub plunger tau dhau ntau txhiab lab ntawm kev ntxhov siab hauv ob peb xyoos. Tus qauv plungers tuaj yeem tsim micro- tawg nyob ib ncig ntawm 8,000 teev, ua rau tsis ua hauj lwm tam sim ntawd- feem ntau ntawm lub sijhawm tseem ceeb. Lub 00U640 ncua lub qhov rais ua haujlwm nyab xeeb rau 12,000-15,000 teev, ua kom lub sijhawm hloov kho nrog lub cav lub sijhawm ua haujlwm tseem ceeb, txo qis kev poob qis.

Q2: Puas yog 00U640 tuaj yeem ntsia tau raws li kev hloov pauv ncaj qha rau 00U635 yam tsis muaj kev rov ua dua?
Ob leeg yog 10.0 mm txoj kab uas hla, tab sis lub 00U640 muaj ib tug 0.5 mm ntev qhia ntev thiab ib tug 0.1 mm luv dua ua ntej -stroke. Lub cev, nws haum, tab sis luv luv ua ntej -stroke nce qhov ntim ntawm 2-3%, yog li SCV daim ntawv qhia yuav tsum tau rov ua dua -calibrated kom tsis txhob over{11}} roj. Peb pom zoo kom lub rooj zaum calibration ua ntej installation.

Q3: Yuav ua li cas txhaj tshuaj peening txheej txheem cuam tshuam lub plunger nto tiav - nws puas ua rau muaj kev sib txhuam?
Txhaj peening me ntsis nce qhov roughness ntawm qhov chaw (Ra ntawm 0.02 mus rau 0.03 µm), tab sis qhov no yog nyob rau hauv qhov tso cai ntau yam thiab muaj txiaj ntsig zoo rau khaws cov roj lubricating. Tom qab sib sib zog nqus- txheej txheem dov polishes saum npoo rov qab mus rau qhov xav tau smoothness, yog li qhov kawg ua tiav raws li OEM specification (Ra Tsawg dua lossis sib npaug rau 0.03 µm).

Q4: Vim li cas TiAlN txheej zoo dua DLC rau daim ntawv thov no, muab tias DLC muaj kev sib txhuam qis?
DLC pib graphitise thiab soften saum 350 degree, poob nws hnav tsis kam. Hauv kev ua haujlwm tas mus li - lub luag haujlwm lub cav, lub plunger nto tuaj yeem ncav cuag 250℃tsis tu ncua, thiab cov spikes tsis tu ncua tuaj yeem tshaj 400℃. TiAlN khaws nws cov tawv tawv thiab tiv thaiv cov txheej txheem kev ntxhov siab subsurface, ua rau nws muaj kev xaiv zoo dua rau kev qaug zog- cov ntawv thov tseem ceeb.

Q5: Dab tsi yog qhov kev lees paub rau lub twj tso kua mis vaj tsev runout yog tias kuv xav ua kom tiav 00U640 lub neej qaug zog tag nrho?
Lub plunger yog tsim los rau lub vaj tse khiav tawm ( ntsuas ntawm lub bore) ntawm Tsawg dua lossis sib npaug li 0.02 hli. Yog tias qhov khiav tawm ntau tshaj 0.03 hli, qhov khoov kev ntxhov siab ntawm lub plunger nce 30%, txo lub neej qaug zog mus rau 8 × 10⁶ cycles. Rau cov vaj tsev qub, peb pom zoo kom tho txawv thiab lub tes tsho los kho qhov kev sib tw.

Q6: Puas tuaj yeem siv 00U640 nrog biodiesel blends (B20-B30) yam tsis txo nws lub neej qaug zog?
Biodiesel's ntau dua bulk modulus tsub kom lub siab nce tus nqi, uas me ntsis nce lub ncov siab ntawm lub plunger - txog li 5%. Lub 00U640's 21% kev ntxhov siab cov paj tau haum rau qhov no, yog li lub neej qaug zog ntawm B30 tseem siab dua 1.8 × 10⁷ cycles, zoo nyob rau hauv lub sijhawm overhaul. Txawm li cas los xij, xyuas kom cov roj cov ntsiab lus dej tswj tau los tiv thaiv hydrogen embrittlement.