Thaum koj hnov 'lub tes tsho bushing', feem ntau xav tias nws tsuas yog lub nplhaib yooj yim ntawm cov hlau, lub spacer. Qhov ntawd yog thawj qhov yuam kev. Nyob rau hauv kev xyaum, nws yog ib feem uas txhais tag nrho los ntawm nws txoj hauj lwm nyob rau hauv ib lub rooj sib txoos, thiab tau txais txoj cai txoj cai yog qhov twg ntau xyoo ntawm foundry thiab machining kev los yog them los yog tawm koj nrog ib tug kim paperweight. Kuv twb pom ntau drawings qhov twg tolerance callout rau lub lub tes tsho bushing OD yog nruj dua li qhov tsim nyog, thaum lub bore tiav lossis cov khoom spec yog qhov kev xav tom qab. Qhov kev tsis sib haum xeeb ntawm lub hom phiaj tsim thiab kev tsim khoom muaj tseeb yog qhov teeb meem pib.
Cov ntaub ntawv yog ntau tshaj ib daim ntawv Spec
Koj xaiv ib yam khoom rau a lub tes tsho bushing raws li qhov nws yuav tsum tau ua, tsis yog qhov uas pheej yig lossis muaj. Lub tes tsho rau lub siab-load, qis-roj teb ua liaj ua teb pivot? 1045 steel, hardened, tej zaum yuav zoo meej. Tab sis rau lub twj tso kua mis nyob rau hauv ib puag ncig chemical, slapping nyob rau hauv lub tes tsho carbon steel yog ib daim ntawv qhia rau ceev ceev corrosion thiab qaug dab peg. Qhov ntawd yog qhov kev paub txog alloy los ntawm tus neeg muag khoom xws li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) ua qhov tseem ceeb. Lawv tau cuam tshuam nrog cam khwb cia hlau, stainless, thiab cov nickel tshwj xeeb lossis cobalt-based alloys rau 30 xyoo. Qhov txawv tsis yog tsuas yog corrosion kuj; Nws yog hais txog qhov sib txawv thermal expansion, galling resistance tiv thaiv cov khoom ncej, thiab yuav ua li cas cov khoom coj tus cwj pwm nyob rau hauv tas li load.
Kuv nco qab txog qhov project rau lub tshuab hluav taws xob hydraulic. Lub tes tsho yog rau kev qhia. Lawv pib qhia ib tus qauv hlau ductile. Nws machined zoo nkauj, tab sis nyob rau hauv kev sim teb nyob rau hauv sab load thiab cuam tshuam, nws tsim cov kab nrib pleb. Kev ntsuas tsis ua hauj lwm taw qhia rau kev qaug zog. Peb tau hloov mus rau qib siab dua, kub-kho alloy hlau los ntawm QSY cov ntaub ntawv pov thawj, uas lawv tuaj yeem cam khwb cia thiab tshuab. Tus nqi tau nce mus, tab sis daim ntawv lees paub tau nqis mus rau xoom. Zaj lus qhia yog tias cov khoom xaiv rau lub bushing tsis passive; nws nquag koom nrog hauv hom tsis ua haujlwm.
Lwm nuance yog cov txheej txheem casting nws tus kheej. Rau lub tes tsho nyuaj geometries nrog cov khoom sab hauv lossis flanges, plhaub pwm lossis peev casting los ntawm tus kws tshaj lij feem ntau ua rau cov duab ze dua dua li sim hog nws tag nrho los ntawm cov khoom siv. Qhov no txo qis machining pov tseg thiab tuaj yeem txhim kho cov nplej ntws hauv cov hlau. Tshawb xyuas lawv qhov chaw ntawm https://www.tsingtaocnc.com, koj tuaj yeem pom lawv ua ke casting nrog CNC machining. Qhov kev sib koom ua ke yog qhov tseem ceeb. Nws txhais tau hais tias tus txiv leej tub machining lub bore to taub lub casting ntawm daim tawv nqaij thiab muaj peev xwm porosity, yog li nws muaj peev xwm teem nws cov cuab yeej thiab pub rau account rau nws, kom ntseeg tau tias qhov kawg ID yog huv si thiab muaj tseeb.
Dab Ntxwg Nyoog nyob hauv qhov Dimensions (thiab Qhov Kawg)
Tolerancing lub tes tsho bushing yog ib qho kev tawm dag zog kom nkag siab tag nrho pawg-up. Lub OD nias-haum rau hauv vaj tse, ID khiav clearance rau lub ncej, concentricity ntawm ob, thiab lub squareness ntawm lub ntsej muag. Nws suab yooj yim, tab sis kuv tau pom cov rooj sib txoos khi vim lub tes tsho, ib zaug nias rau hauv nws lub tsev, distorted me ntsis, tig ib tug zoo kawg nkaus puag ncig mus rau hauv ib tug hloov maj mam oval. Qhov kho? Qee lub sij hawm nws tau kho qhov kev cuam tshuam ntawm xovxwm, qee zaum nws tau qhia txog kev ntxhov siab-kev kho cua sov tom qab siv lub tshuab, lossis qee zaum nws tsuas yog siv lub tshuab nqus tsev tom qab lub tes tsho yog nias rau hauv qhov chaw rau cov ntawv thov tseem ceeb.
Nto tiav ntawm tus ID yog lwm tus neeg tua neeg uas ntsiag to. Ntxim ntxhib dhau, thiab nws ua zoo li lub duav, hnav hauv qab ncej. Ib yam nkaus thiab du (thiab yog, muaj xws li ib yam), thiab nws yuav tsis khaws cov zaj duab xis lubrication. Ib qho honed lossis dhuav tiav rau ib qho Ra yog ib yam, tab sis cov kev taw qhia ntawm cov cuab yeej tseem ceeb heev. Lawv yuav tsum ua kom zoo tshaj plaws khiav axially los pab hauv lubricant faib, tsis yog circumferentially. Qhov no yog hom kev nthuav dav koj tsuas yog qhia thaum koj tau pom cov qauv coj los ntawm kev ua tsis ncaj ncees lawm.
Ntev thiab phab ntsa thickness feem ntau tsis pom. Ib lub tes tsho uas luv dhau rau nws txoj kev coj ua tsis tuaj yeem ua haujlwm hauv qab. Ib phab ntsa uas nyias dhau yuav deflect, poob nws cuam tshuam haum. Muaj cov kev suav yooj yim, tab sis kev paub ua rau koj xav tau. Rau ib daim ntawv thov hnyav, kuv yuav tsis tshua mus hauv qab phab ntsa tuab uas yog tsawg kawg 1/8 ntawm txoj kab uas hla, kho rau cov khoom siv zog. Nws yog qhov pib, tsis yog txoj cai, tab sis nws los ntawm kev saib cov khoom tawg.
Thaum lub tes tsho tsis yog lub tes tsho xwb: Kev sib koom ua ke thiab kev ua haujlwm
Tsis yog txhua lub tes tsho bushing yog cov thooj voos kheej kheej. Qee qhov yog flanged rau qhov chaw axial. Qee tus muaj grooves rau O-rings lossis roj raws. Qee qhov sib cais (lub tes tsho bearings, tiag tiag). Txoj kev tsim khoom hloov pauv tag nrho. Lub tes tsho flanged tej zaum yuav yog qhov zoo tshaj plaws los ua ib qho casting kom tsis txhob vuam. Machining sib sib zog nqus, me me-ntev roj cov chaw nres nkoj yuav tsum muaj cov cuab yeej zoo thiab lub siab txias kom tsis txhob muaj kev sib tsoo hauv qhov chaw - qhov kev ntxhov siab thiab kim qeeb.
Kuv tau ua haujlwm ntawm lub rooj sib txoos compressor qhov twg lub tes tsho bushing muaj ib tug kauv roj zawj hauv ID. Tus tsim hu rau nws yuav tsum machined tom qab-installation. Txawm li cas los xij, cov khoom siv vaj tsev thiab cov khoom siv tes tsho machined ntawm cov nqi sib txawv, ua rau qhov tsis sib haum xeeb qhov tob. Cov kev daws teeb meem, ua haujlwm nrog pab pawg machining, yog ua ntej tshuab lub zawj me ntsis hauv lub tes tsho ib leeg, tom qab ntawd ua tiav qhov kawg tom qab kev teeb tsa. Nws ntxiv ib kauj ruam tab sis lav kev ua tau zoo. Qhov no yog qhov chaw muag khoom lub peev xwm CNC machining, zoo li qhov QSY muaj, hloov los ntawm cov kev pabcuam yooj yim mus rau kev sib koom tes daws teeb meem.
Kev sib koom ua ke ntawm casting thiab machining nyob rau hauv ib lub ru tsev, raws li pom nrog Qingdao Qiangsenyuan Technology, txo cov kev ua yuam kev no. Tus kws kho tshuab tsis tau txais ib lub thawv dub tsis meej los ntawm qhov chaw tsim khoom; lawv yog ib feem ntawm tib txoj kev khiav. Qhov no tswj cov kev hloov pauv xws li datum sib xws los ntawm cov cam khwb cia dawb paug rau qhov ua tiav, uas yog qhov tseem ceeb heev rau cov khoom siv uas ob peb puas ntawm ib millimeter txhais tau tias ua tiav lossis tsis ua tiav.
Kev Ua Tsis Taus thiab Yam Lawv Qhia
Lub sijhawm qhia ntawv tshaj plaws yog los ntawm kev ua tsis tiav. Ib qho classic yog fretting corrosion. Lub tes tsho nrog cov xovxwm kom raug, nyob rau hauv cov khoom zoo, tseem ua tsis tau. Vim li cas? Vim tias nyob rau hauv cyclic vibrational load, microscopic txav tshwm sim ntawm qhov sib cuam tshuam ntawm lub tes tsho OD thiab lub tsev ID. Qhov no tshem tawm cov txheej txheem oxide tiv thaiv, nthuav tawm cov hlau tshiab, oxidizes, thiab rov ua dua. Qhov tshwm sim yog ib qho zoo, abrasive hmoov uas loosens qhov haum. Kev kho yuav koom nrog kev kho deg sib txawv ntawm OD, zoo li phosphating, lossis siv cov khoom sib txuas ntxiv rau cov xovxwm haum.
Lwm qhov tsis ua haujlwm yog thermal locking. Hauv daim ntawv thov kub kub, yog tias lub tes tsho thiab cov khoom siv muaj qhov sib txawv ntawm qhov sib txawv ntawm thermal expansion, qhov zoo tshaj plaws chav-kub clearance yuav tig mus rau hauv kev cuam tshuam ntawm kev khiav hauj lwm temp, tuav lub ncej. Peb kawm qhov no txoj kev nyuaj ntawm lub turbine auxiliary tsav. Lub tes tsho stainless hlau nthuav dav ntau dua li cov pa roj carbon steel ncej. Kev suav tsis tau nyob hauv thawj qhov kev tsim iteration. Nws yuav tsum tau ib tug tag nrho re-spec: ib tug sib txawv alloy rau lub tes tsho kom zoo dua match tus ncej qhov expansion tus nqi.
Cov no tsis yog teeb meem theoretical. Lawv yog cov laj thawj vim li cas 30 xyoo tom qab QSY hais txog tsis yog kev lag luam luam xwb. Nws yog qhov chaw cia khoom ntawm cov kev kawm tau kawm thoob plaws ntau txhiab tus cam khwb cia thiab machined Cheebtsam, qhov twg a lub tes tsho bushing yog qhov txuas tseem ceeb hauv cov saw hlau. Qhov kev paub no qhia cov lus nug uas lawv nug thaum lawv tau txais daim duab: Dab tsi yog qhov chaw ua haujlwm? Dab tsi yog cov khoom mating? Qhov no puas yog rau kev sib tw, hnav tsis kam, lossis ob qho tib si?
Lub Pragmatic Takeaway
Yog li, thaum qhia lossis muab lub tes tsho bushing, txav dhau qhov yooj yim luam tawm. Xav tias nws yog qhov system interface. Cov khoom siv yuav tsum raug xaiv rau tag nrho lub luag haujlwm-load, ceev, kub, ib puag ncig. Qhov ntev yuav tsum suav rau kev sib dhos deformation thiab thermal cuam tshuam. Cov txheej txheem tsim khoom yuav tsum muaj peev xwm xa cov duab geometry uas xav tau thiab ua tiav yam tsis muaj kev ntxhov siab lossis qhov tsis xws luag.
Kev koom tes nrog cov chaw tsim khoom lag luam uas tswj hwm ob qho tib si metallurgy (los ntawm kev casting) thiab precision machining yog qhov zoo dua. Nws tso cai rau kev tawm tswv yim loops. Piv txwv li, cov kws kho tshuab tuaj yeem qhia qhov chaw tsim khoom yog tias ib qho kev sib xyaw ua ke tsis tu ncua ua rau cov cuab yeej hnav, ua rau muaj kev tshuaj xyuas txog kev kho cua sov lossis lwm qhov kev tawm tswv yim. Qhov kev sib koom tes, kev daws teeb meem hauv av yog dab tsi cais cov haujlwm ua haujlwm ntawm ib qho kev ntseeg siab.
Thaum kawg, lub tes tsho bushing yog ib feem txo hwj chim. Tab sis nws txoj kev txo hwj chim yog dag. Nws txoj kev vam meej yog nyob ntsiag to thiab tsis pom; nws tsis ua hauj lwm yog nrov thiab kim. Tau txais nws txoj cai yog kev sib xyaw ntawm qhov tseeb physics, cov tswv yim metallurgy, thiab kev tsim khoom ncaj ncees - ib qho kev sib xyaw uas hloov lub nplhaib ntawm cov hlau yooj yim rau hauv ib qho khoom siv hluav taws xob.
