Lub neej ua haujlwm ntev npaum li cas ntawm npauj npaim li qub feem ntau?

Kev pab lub neej ntawmnpauj npaim li qubcuam ​​tshuam los ntawm ntau yam cuam tshuam, feem ntau hloov pauv hauv thaj tsam ntawm 5 txog 20 xyoo. 

Cov kev txiav txim tshwj xeeb yuav tsum tau ua raws li cov khoom siv, kev ua haujlwm, kev ua haujlwm zaus, thiab qib txij nkawm. Qhov sib txawv ntawm qhov tseem ceeb ntawm lub neej yog vim tsim qhov sib txawv ntawm cov qauv sib khi: cov nplaum nplaum npauj npaim li qub tso siab rau cov ntaub ntawv elastic xws li roj hmab lossis polytetrafluoroethylene kom ua tiav sealing. Txawm hais tias cov ntaub ntawv no muaj kev sib khi zoo heev, lawv muaj kev nkag mus thiab kev laus thaum raug rau nruab nrab siab, qhov kub thiab txias hloov, thiab nquag qhib thiab kaw, uas ua rau deformation lossis tawg ntawm lub sealing nto. Piv txwv li, nyob rau hauv qhov kub thiab txias thiab dej huv, qhov muag muag npauj npaim valve tuaj yeem qhib thiab kaw ntau dua 50000 zaug, nrog lub neej ntev li ntawm 5 txog 8 xyoo; Yog hais tias siv nyob rau hauv ib tug conveying system uas muaj granular xov xwm, particle yaig yuav ua rau kom lub hnav ntawm lub sealing nto, thiab cov kev pab cuam lub neej yuav luv luv rau 3 mus rau 5 xyoo. Lub zog kaw npauj npaim valve tau txais cov hlau rau hlau sealing (xws li stainless hlau, chromium molybdenum steel), thiab nws cov hnav tsis kam yog txhim kho los ntawm vuam nyuaj alloy los yog txau-resistant txheej. Nws peb cov qauv eccentric ua tiav qhov kev sib txhuam tsis muaj qhov qhib thiab kaw cov txheej txheem los ntawm peb-dimensional offset ntawm axis, cone nto thiab kev sib cuag taw tes, txo qis hnav tus nqi. Nyob rau hauv high-temperature thiab high-pressure steam pipelines, lub sij hawm qhib thiab kaw ntawm lub zog kaw npauj npaim li qub tuaj yeem tshaj 100000 zaug, thiab lawv lub neej muaj peev xwm ncav cuag 10 txog 20 xyoo; Yog hais tias qhov nruab nrab yog cov tshuaj corrosive heev, cov ntaub ntawv corrosion-resistant xws li Hastelloy yuav tsum tau siv. Txawm hais tias lub neej ntev yuav luv me ntsis vim muaj kev txwv cov khoom siv, nws tseem tuaj yeem ua haujlwm ruaj khov rau 8 txog 15 xyoo.

Cov xwm txheej ua haujlwm yog lwm yam tseem ceeb uas txiav txim siab lub neej ntawmnpauj npaim li qub. Hauv kev tshaj tawm huv si, ib puag ncig me me, thiab cov xwm txheej ua haujlwm tsawg zaus, cov khoom siv lub valve raug rau cov quab yuam tsis sib xws, nrog rau tus nqi qis thiab lub neej feem ntau mus txog qhov kev txwv siab tshaj. Piv txwv li, hauv lub nroog cov dej hauv nroog, cov npauj npaim mos mos tuaj yeem qhib thiab kaw tsawg dua 5 zaug hauv ib hnub, thiab nrog kev saib xyuas kom zoo, lawv lub neej yuav ncav cuag 8 txog 10 xyoo. Ntawm qhov tsis sib xws, hauv kev ua haujlwm hnyav xws li metallurgy thiab chemical engineering, kub siab (dhau 400 ℃), siab siab (dhau 10MPa), muaj zog corrosion (xws li acid-base solutions), lossis siab hnav (xws li slurry thiab tshauv) xov xwm tuaj yeem ua rau cov khoom laus thiab cov khoom puas. Piv txwv li, nyob rau hauv lub blast furnace gas pipeline ntawm ib tug steel nroj tsuag, lub hard sealed npauj npaim valve yuav tsum tau tiv taus kub ntawm 800 ℃ thiab lub scouring ntawm plua plav airflow. Txawm tias muaj kev tiv thaiv ceramic, nws lub neej kev pabcuam tsuas tuaj yeem khaws cia rau 5 txog 8 xyoo.

Qhov cuam tshuam ntawm kev ua haujlwm thiab kev saib xyuas theem ntawm kev ua neej tsis tuaj yeem raug ignored. Kev qhib thiab kaw ntau zaus (ntau dua 10 zaug hauv ib hnub) tuaj yeem ua rau hnyav hnyav ntawm cov khoom sib kis xws li lub valve stems thiab bearings, ua rau muaj zog qhib thiab kaw thiab txawm tias jamming; Kev ua tsis tau raws li cov lus qhia tshwj xeeb (xws li tsis tu ncua lubricating lossis tu impurities ntawm lub sealing nto) yuav ua rau kom lub hnub nyoog ntawm cov ntsaws ruaj ruaj thiab ua kom lub neej ntev ntawm lub valve. Piv txwv li, hauv cov nroj tsuag tshuaj, qhov tsis ua hauj lwm tsis tu ncua hloov lub valve lub rooj sib khi lub nplhaib ua rau muaj kev cuam tshuam loj ntawm lub valve tom qab 3 xyoos ntawm kev ua haujlwm, thaum lub valve tswj tau raws li cov cai hauv tib lub sijhawm ua haujlwm tuaj yeem muaj lub neej ntev txog 12 xyoos. Yog li, kev xaiv tsim nyog, kev ua haujlwm tau zoo, thiab kev saib xyuas tsis tu ncua yog cov tswv yim tseem ceeb los txuas ntxiv lub neej kev pabcuamnpauj npaim li qub.