Nyob rau hauv dab tsi tshwj xeeb sib xyaw ua ke ntawm siab -Ntau zaus Thermal Cycling thiab Mechanical Vibration Puas yog 2.0 millimeter 316 Stainless Steel Sheath Ua kom pom lub neej qaug zog qis dua piv rau 1.2 millimeter sheath hauv cov txheej txheem cua sov?

Rau kev ntseeg siab engineers ntawm hluav taws xob immersion heaters siv nyob rau hauv kev txhaj tshuaj molding tshuab, reciprocating compressors thiab thermal roj tshuab, kev sib xyaw ua ke ntawm thermal cycling nrog mechanical vibration generates ib tug nyuaj qaug zog mob tsis tshua muaj nyob rau hauv ib hom kev kuaj. Intuition qhia peb tias tuab 2.0 hli 316 sheath yuav tsum nyob ntev dua li lub thinner 1.2 hli sheath raug rau cyclic loading. Tab sis qhov thim rov qab yog qhov tseeb thaum lub sijhawm siab thermal cycling ua ke nrog kev vibration nruab nrab. Cov phab ntsa tuab ua rau muaj kev kub ntxhov siab dua, thiab nws qhov nruj dua ncaj qha xa cov kev co quab yuam mus rau MgO interface, uas ua rau kom tawg tawg.

Mechanism of Interaction ntawm Thermal Stress thiab Vibration Fatigue
Thermal voj voog qaug zog nyob rau hauv ib tug 316 sheath tsuas yog tsav los ntawm qhov kub ntawm qhov sib txawv ntawm phab ntsa. Qhov kev hloov pauv hloov pauv yog li 220 ° C rau 2.0 hli phab ntsa thaum lub sijhawm 20 ° C mus rau 250 ° C voj voog ntawm 10 ° C ib ob. Lub thermal stress yog hais txog 350 MPa- considerably saum lub zog tawm los ntawm 316 ntawm qhov kub siab. Cov khoom siv plastically muab nyob rau hauv txhua lub voj voog, accumulating puas. Rau ib phab ntsa ntawm 1.2 hli, tib lub sijhawm ua rau gradient ntawm 130 ° C thiab kev ntxhov siab txog 200 MPa, feem ntau yog qis dua qhov taw tes tawm. Thaum cov neeg kho tshuab kev co overlaid, cov kev puas tsuaj mechanisms cuam tshuam. Lub 2.0 hli sheath yog twb nyob ze los yog siab tshaj tawm los ntawm lub thermal kev nyuaj siab ib leeg thiab ntxiv ntawm txawm ib tug me me vibration kev nyuaj siab yuav siv cov khoom ntxaum mus rau hauv lub yas tswj. Kev suav nrog kev vibration kev nyuaj siab rau 1.2 hli sheath uas tsuas yog elastic nyob rau hauv thermal stress kuj tseem khaws cov khoom hauv qab no.