Kev tsim cov hydraulic li qub ua ntej yuav tsum ua tib zoo ua cov tub ntxhais valve, lub cev valve, thiab lwm yam raws li cov qauv tsim, cov ntaub ntawv txheej txheem, thiab cov kev xav tau; thib ob xaiv qhov zoo tshaj plaws accessories (xws li hluav taws xob-mechanical converters, thiab lwm yam); thiab thaum kawg ua tib zoo sib sau ua ke raws li qhov yuav tsum tau muaj. Standard xeem ua rau cov khoom zoo. Cia peb saib cov khoom tseem ceeb hauv cov txheej txheem hydraulic valve.
1. Khoom siv ntawm lub cev valve (plhaub)
(1) Feem ntau ntawm lub cev lub cev hauv cov hydraulic li qub uas siv cov roj hydraulic raws li qhov nruab nrab ua haujlwm yog grey cam khwb cia hlau (xws li HT250. HT300, thiab lwm yam) lossis cov hlau nplaum (xws li QT400-15, QT{{ 4} }, thiab lwm yam), thiab ib tug me me ntawm lawv yog ua los ntawm For alloy cam khwb cia hlau thiab vermicular graphite cam khwb cia hlau, cov roj passages yog feem ntau cam khwb cia. Cov plaub hau casting ntawm hydraulic qhov chaw yuav tsum muaj cov khoom siv zoo xws li lub zog, toughness, elastic modulus, thiab ntom kom tiv taus kev ua haujlwm siab; cov plaub hau casting kuj yuav tsum muaj ib tug meej positioning siv, ib tug yog thiab du zoo, thiab ib tug du casting Lub puab ntws channel yog ua tau raws li qhov yuav tsum tau ntawm CNC tshuab cuab yeej, machining chaw, thiab lwm yam kev ua thiab txo qhov system siab poob; Lub puab kab noj hniav ntawm lub casting yuav tsum huv si thiab tsis muaj cov seem seem ntawm cov xuab zeb, xeb, nplai thiab lwm yam khib nyiab los txhim kho kev ntseeg siab ntawm lub valve thiab kev ua haujlwm. poj niam deev.
(2) Lub cev lub cev ntawm lub servo valve feem ntau hu ua lub plhaub, thiab nws siv ntau hom khoom. Nws feem ntau yog ua los ntawm stainless hlau 1Cr18Ni9Ti, 9Cr18, Cr17Ni2. Nws tseem yog ua los ntawm txhuas alloy LDIO thiab ZL105. Nyob rau hauv xyoo tas los no, nag lossis daus-hardened stainless hlau OCr17Ni4Cu4Nb tau maj mam siv. Cov hlau no muaj kev tiv thaiv corrosion ntawm cov hlau tsis zoo tib yam, thiab tib lub sijhawm, nws lub zog tuaj yeem txhim kho los ntawm nag lossis daus hardening. Nws yog stainless hlau muaj zog heev. Nws cov corrosion kuj zoo ib yam li austenitic stainless hlau 1Cr18Ni9Ti. Nws lub zog tensile zoo dua 30CrMnsi.
2. Cov khoom siv ntawm lub valve tseem ceeb thiab lub tes tsho valve
Precision qhov chaw xws li cov tub ntxhais valve thiab lub tes tsho valve hauv hydraulic li qub feem ntau yog ua los ntawm 45 steel, 40Cr, Cr12MoV, 12CrNi3A, 18CrMnTi, 18CrNiWA thiab GCr15, thiab lwm yam khoom siv qib siab steel, high-alloy structural steels. thiab cov hlau zoo. thiab bearing steel thiab lwm yam ntaub ntawv. Cov khoom siv yuav tsum muaj kev hnav zoo, kev nthuav dav coefficient, thiab me me deformation. Txhawm rau txhim kho qhov hnav tsis kam ntawm lub valve tub ntxhais, cov khoom siv saum npoo yuav tsum ncav cuag ib qho hardness (feem ntau yuav tsum muaj ntau dua lossis sib npaug rau 58HRC). Yog li ntawd, kev kho cua sov sib txawv xws li quenching, carburizing, thiab nitriding tuaj yeem siv rau cov khoom sib txawv. (2) Ntxiv rau qhov yuav tsum tau ua kom muaj zog siab, cov khoom siv ntawm lub valve tseem ceeb hauv lub hydraulic valve yuav tsum muaj kev tiv thaiv zoo rau cov dej tsis qab los yog dej hiav txwv corrosion. Txawm hais tias austenitic stainless hlau muaj qhov zoo corrosion kuj, nws yog ib qho nyuaj rau ua rau kom lub hardness ntawm cov khoom los ntawm kev kho cua sov, yog li nws tsis haum raws li ib tug valve core khoom. Feem ntau, martensitic stainless hlau xws li 2Cr13 / ICrl7Ni, nag lossis daus-hardening stainless hlau xws li 0Cr17Ni4Cu4Nb, lossis engineering ceramics tuaj yeem siv los ua cov khoom siv ntawm hydraulic valve core. Ntawm lawv, martensitic stainless hlau tsuas yog siv tau hauv dej tshiab. 0Cr17Ni4Cu4Nb yog cov hlau tsis muaj zog muaj zog nrog corrosion kuj ze rau 1Cr18Ni9Ti austenitic stainless hlau. Thaum ua tiav cov hlau tsis muaj steel, cov kev kho cov kua dej feem ntau ua tiav ua ntej, thiab kev kho kom muaj zog nag lossis daus ua ntej precision machining (qhov hardness siab tshaj plaws tuaj yeem tau txais thaum lub hnub nyoog kub yog 420 degree thiab kev txuag hluav taws xob ntau tshaj 10 teev). Cov khoom ntawm lub tes tsho valve nyob rau hauv lub hydraulic valve yuav tsum xub muaj zoo corrosion kuj thiab hnav tsis kam. Tsis tas li ntawd, qhov tsim nyog sib txuam ntawm lub tes tsho valve thiab cov ntaub ntawv tseem ceeb ntawm lub valve kuj tseem ceeb heev. Adhesion hnav, corrosion hnav, thiab lwm yam yuav tsum tau tiv thaiv ntawm lub tes tsho valve thiab cov ntaub ntawv tseem ceeb los txhim kho lub neej thiab kev ntseeg siab ntawm hydraulic valve. Lub tes tsho valve feem ntau tuaj yeem ua los ntawm QA19-4 bronze lossis polymer cov ntaub ntawv uas muaj kev tiv thaiv corrosion zoo. Ntawm lawv, cov ntaub ntawv polymer yuav tsum muaj cov yam ntxwv ntawm lub zog siab, hnav tsis kam, me me linear expansion coefficient, tsis tshua muaj dej nqus, thiab kev ua haujlwm zoo.
Muaj ntau ntau yam ntawm hydraulic valve, thiab nws tsis yooj yim los tham txog lawv ib qho los ntawm ib qho. Yog li, ntu no tsuas yog qhia txog lub cev lub cev (plhaub) hauv lub valve hydraulic: cov ntaub ntawv thiab cov khoom siv ntawm cov khoom tseem ceeb xws li lub valve core thiab lub tes tsho valve.
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