Ntim qog: ntau yam thiab daim ntawv thov nta

Cov pob qog yog cov khoom uas yog npaj rau cov thawv rau khoom. Cov khoom siv yog ib qho xaum koos uas muaj lub xwm fab xwm yeem los yog vas sab. Cov khoom yog tsim los ntawm ib qho xov asbestos los yog lwm cov khoom siv raw. Ua tsaug rau cov ntaub ntawv uas tau nthuav tawm, nws yog ua tau kom kom ceev ceev ntawm qhov txav thiab kev sib txuas ruaj ruaj ntawm cov mechanisms. Cords kom zoo rau lub zog ntawm qhov chaw txhoj puab heev thiab tiv taus kub hloov. Raws li cov khoom ntawm lub chaw ua khoom ntawm qhov khoom yuav muab faib rau asbestos thiab tsis asbestos.

Cov pob qog yuav tsum muab lub cim nias kom zoo hauv txhua qhov chaw. Lawv tuaj yeem faib ua ntau hom thiab cov chav kawm. Txhua tus ntawm lawv muaj qee theem thiab lub neej. Piv txwv li, asbestos khoom tej zaum yuav siv nyob rau hauv cov khoom uas dab roj, thiab kuj communicates nrog tshuaj. Ib txheej txheej txheej txheem yog siv los ntawm kev siv tshwjxeeb.

Qee yam khoom uas tau hais no yuav muaj graphite fibers, uas yog impregnated nrog polytetrafluoroethylene, thiab kuj tau siv nrog cov paj rwb xov. Cov thawv ntim khoom siv no yuav siv foob plunger thiab centrifugal twj. Lawv zoo nyob hauv kev tiv thaiv dej ntub. Thiab cov khoom uas tau hais tuaj yeem tswj cov cua kub cua hauv cov twj, thiab txo cov kev siv zog. Lub fact tias lawv muaj ib tug uas tsis muaj coefficient ntawm tsis sib haum xeeb. Cov khoom siv graphite kom zoo dua yog tias lawv muaj zog heev kom siab kub (li 550 degrees) ), Tshuaj lom neeg. Txawm li cas los, nws yog tsis yooj yim sua los subject cov khoom mus rau cov av noo vim nws yuav ua rau kom xeb hlau nyob rau hauv lub mechanisms.

Graphite gland packing yuav ua tau lub hauv paus lub cev. Siv cov khoom siv no los txhim kho cov chaw uas txhua txoj kev khiav tsheb mus los. Ntau zaus, txoj kev padding yuav tsum tau nyob hauv kev lag luam hauv zos thaum lub sij hawm kev tu cov dej xa los cua kub. Tsaug rau cords nws yog ua tau tsis tsuas yog mus nres lub paim quav, tab sis kuj los tiv thaiv nws ntxiv tsos.

Yog tias koj siv cov thawv npov yas rau cov twj centrifugal, ces nws yog qhov zoo tshaj plaws xaiv cov paj rwb qaum. Ua ntej khoom yuav tsum tau ntub rau hauv cylinder roj, uas yuav muaj ib qho nyiaj tsawg ntawm paraffin. Qhov zoo ntawm cov khoom siv no yog tias nws tuaj yeem tiv taus siab txog 20 mPa thiab ua tiav nws cov dej num hauv qhov dav dav (-40 rau +100 degrees). Txawm li cas los xij, cov khoom raug muab pov tseg los ntawm alkali thiab acids.

Ib qho kev xaiv nthuav yog polymeric stuffing lub thawv, uas yog ua los ntawm fluoroplastic. Lawv tuaj yeem ua tau rau hauv daim ntawv ntawm cov rings, shavings los yog ris. Cov ntaub ntawv no muaj lub me elasticity, yog li ntawd ntxiv rau nws, cov ntaub qhwv yuav tsum siv. Tsis tas li ntawd muab variations ntawm packings, tseem muaj cov neeg nyob rau hauv uas siv tooj liab hlau.