Cov khoom degradation los yog tsis ua hauj lwm los ntawm kev qaug zog, corrosion, hnav thiab cavitation yuav ua rau muaj kev khiav hauj lwm ntau dua thiab cov nqi kho mob rau cov axial. cais case twj. Feem ntau, cov teeb meem no tuaj yeem zam tau los ntawm kev xaiv cov khoom tsim nyog.

Plaub lub ntsiab lus hauv qab no yog cov txheej txheem rau kev xaiv cov khoom siv rauaxial split case twj tso kua misntawm high flow rate:

1. Vim lub siab ntws ntawm lub twj tso kua mis, lub zog qaug zog (feem ntau nyob rau hauv ib puag ncig corrosive) yog ze ze rau cov hlab ntsha siab, dynamic thiab zoo li qub cuam tshuam thiab alternating stresses.

2. Corrosion tshwm sim los ntawm cov dej ntws siab, tshwj xeeb yog yaig.

3. Cavitation

4. Hnav los ntawm cov khoom uas nkag mus rau hauv cov kua.

Hnav thiab cavitation yog cov khoom siv tseem ceeb ntawm kev hnav khaub ncaws, uas qee zaum muaj zog los ntawm corrosion. Corrosion yog ib qho kev sib xyaw ntawm cov tshuaj lom neeg ntawm cov hlau, cov khoom siv hluav taws xob, cov pa oxygen thiab cov khoom siv tshuaj. Cov tshuaj tiv thaiv no ib txwm muaj, txawm tias nws tsis raug kuaj pom. Tsis tas li ntawd, lub impeller tip ceev yog txwv los ntawm hydraulic, vibration thiab suab nrov yuav tsum tau.

Cov ntaub ntawv hlau feem ntau siv nyob rau hauv axial split case twj yog raws li nram no:

Cam khwb cia hlau - tsis muaj zog hnav tsis kam

Carbon steel - siv nyob rau hauv dej tsis muaj oxygen thiab corrosives

Cov hlau tsis tshua muaj hlau - tsis cuam tshuam rau cov txheej txheem corrosion

Martensitic steel - haum rau cov dej huv lossis dej muag

Austenitic steel - zoo tiv thaiv corrosion thiab yaig

Duplex steel - tuaj yeem tiv taus siab corrosion

Cov neeg siv yuav tsum xaiv cov khoom tsim nyog rau axial split case twj tso kua mis raws li qhov xav tau tiag tiag kom ntev lub neej kev pab cuam ntawm lub twj tso kua mis ntau li ntau tau.