I. Kev daws teeb meem kev hnav thiab xoob
Bearing Failure: Hnav los yog kev puas tsuaj rau lub crankshaft bearings thiab txuas qws bearings ntawm lub tshuab cua compressor yuav ua rau ib tug nruam "humming" los yog "squeaking" suab nrov. Disassemble lub compressor kawg cover thiab xyuas cov bearing clearance (ib txwm clearance yuav tsum tsawg tshaj li los yog sib npaug rau 0.05mm). Yog hais tias qhov clearance tshaj tus qauv los yog yog hais tias cov bearing balls qhia pitting los yog tawg, cov bearings yuav tsum tau hloov nrog tib specification.
Piston thiab Lub tog raj kheej liner hnav: Kev hnav ntau dhau ntawm lub nplhaib piston thiab cov qhab nia ntawm lub tog raj kheej liner sab hauv phab ntsa yuav ua rau lub suab "knocking" thaum compression. Tom qab disassembly, ntsuas qhov clearance ntawm lub tog raj kheej liner thiab piston. Cummins thawj lub Hoobkas qauv tshem tawm yog 0.03-0.08mm. Yog tias nws dhau qhov kev txwv, lub nplhaib piston lossis tag nrho piston thiab lub tog raj kheej liner sib dhos yuav tsum tau hloov.
Loose Fasteners: Loose compressor mounting bolts and pulley bolts will cause vibration noise. Tighten each mounting bolt of the fixing bracket one by one (torque must meet the requirements of the Cummins service manual, generally 35-45 N·m). Check if the pulley is misaligned. If the misalignment is >0.2 hli, nws yuav tsum tau kho los yog hloov.
II. Tshawb xyuas txoj siv tsav thiab kev teeb tsa.
Txoj siv tawv laus lossis tsis tsim nyog: Cov hlua khi hlua khi los yog xoob yuav ua rau lub suab nrov "slipping", thaum nruj heev yuav ua rau cov kabmob hnav. Kho txoj siv tawv nruj; qhov deflection yuav tsum yog 10-15 mm thaum nias nruab nrab ntawm txoj siv. Yog tias txoj siv sia muaj kab nrib pleb lossis cov hniav ploj lawm, nws yuav tsum tau hloov nrog lub Hoobkas qub- siv V-siv.
Installation coaxiality sib txawv: Ntau coaxiality sib txawv ntawm lub compressor thiab cav tsav pulleys yuav ua rau txawv txav txoj siv thiab suab nrov. Siv lub ntsuas dial los xyuas cov coaxiality; qhov sib txawv yuav tsum tau tswj tsis pub dhau 0.1 hli. Yog tias nws tshaj qhov txwv, kho lub compressor mounting bracket txoj hauj lwm.
Optimize Lubrication thiab Pressure Systems
Tsis txaus los yog Deteriorated Lubricating Roj: Yog hais tias lub lubricating roj theem nyob rau hauv lub compressor crankcase yog qis dua lub cim, los yog yog hais tias cov roj viscosity tau txo los yog muaj ntau impurities, nws yuav ua rau qhuav qhuav suab nrov nyob rau hauv cov khoom txav. Ntxiv Cummins-cov roj compressor tshwj xeeb raws li qhov xav tau, tswj cov roj theem ntawm cov cim saum toj thiab qis ntawm lub dipstick. Yog hais tias cov roj yog dub los yog muaj impurities, nws yuav tsum tau hloov tag nrho thiab ntxuav lub crankcase.
III. Lub siab dhau los lossis tshem tawm lub valve tsis ua haujlwm: Lub kaw lus daig lossis ua haujlwm tsis zoo yuav ua rau lub tshuab compressor ua haujlwm ntawm lub siab tsis tu ncua, ua rau lub suab nrov "roaring". Txheeb xyuas yog tias cov tub ntxhais tsis muaj lub valve raug thaiv, ntxuav lub valve tub ntxhais thiab lub rooj zaum, thiab xyuas kom meej tias qhov kev tshem tawm lub siab ruaj khov ntawm Cummins tus nqi (feem ntau 0.8-1.0 MPa). Yog hais tias lub unloading valve puas lawm, hloov nws nrog ib tug thawj qhov chaw.
Kev Pabcuam Tsis Txaus Ntshai: Yog tias cov khoom siv kho mob zoo li qub tom qab kev daws teeb meem, lub compressor soundproof npog tuaj yeem ntsia tau, lossis roj hmab vibration damping pads tuaj yeem muab ntxiv rau lub mounting bracket kom txo qis kev co suab nrov kis tau tus mob.
