Kev suav ntawm Expansion Pressure rau Hydraulic Tube Expanding Tshuab

Kev suav ntawm Expansion Pressure rau Hydraulic Tube Expanding Tshuab

Hydraulic yeeb nkab expander yog tsim los ntawm high-strength alloy steel tub ntxhais pas nrig thiab high-pressure imported elastic roj hmab, nrog ib tug kev tsim qauv. Nws tuaj yeem tiv taus lub siab ultra-siab yam tsis tas yuav tsum muaj cov khoom sib khi, yooj yim siv, thiab muaj kev ua haujlwm siab. Thaum lub siab-siab elastic roj hmab lub cev tsim radial siab, lub siab yog txaus los ua cov yas deformation ntawm cov khoom siv yeeb nkab, yog li ua tiav cov expansion sib koom ua ke ntawm cov yeeb nkab thiab cov yeeb nkab phaj.

Raws li qhov tseeb tej yam kev mob xws li cov khoom ntawm lub raj phaj thiab cov geometric tsis ntawm expansion sib koom, lub expansion siab yuav xam tau siv cov nram qab no mis:

1. Cov residual contact stress ntawm cov yeeb nkab tuaj yeem suav nrog cov qauv hauv qab no: Pc=(1-2C) Pi- σ Stlnkt (1)

Ntawm lawv, C=1/{kt (1-Ut)+1+Us+Et [(kt-1)/Es (ks-1)] [{ {6}} Us+ks (1+Us)]}

Los ntawm cov kab zauv saum toj no, nws tuaj yeem pom tau tias thaum cov khoom siv ntawm cov yeeb nkab thiab cov yeeb nkab phaj, nrog rau qhov loj ntawm cov yeeb nkab qhov qauv tau muab, C yog tus nqi tas li.

2. Yog tias f yog qhov sib txhuam coefficient ntawm sab nrauv ntawm cov yeeb nkab thiab lub qhov ntawm cov yeeb nkab phaj, [q] yog qhov tso cai rub lub zog, thiab rau cov nplaum nthuav dav [q]=2MPa, lub zog nthuav dav [q ]=4MPa, qhov seem ntawm kev sib cuag yuav tsum ua raws li cov cai hauv qab no:

Pc Ntau dua lossis sib npaug rau [q]/f (2)

Hloov cov kab zauv saum toj no rau hauv kab zauv (1), nws tuaj yeem pom tau tias tus nqi tso cai ntawm kev nthuav dav yuav tsum ua raws li kev sib raug zoo hauv qab no

[Pi] Ntau dua lossis sib npaug rau {[q]/f+ σ Stlnkt}/(1-2c) (3)

3. Qhov siab tshaj plaws expansion siab yog lub siab uas lub puab phab ntsa ntawm lub raj phaj yields, piv txwv li.

Pimax= σ Stlnkt+ σ Splnks (4)

Yog li ntawd, xaiv ntau yam ntawm expansion siab yog

σ Stlnkt+ σ Splnks Ntau dua lossis sib npaug rau [Pi] Ntau dua lossis sib npaug rau {[q]/f+ σ Stlnkt}/(1-2c) (5) [1]

Symbol Description

Es, Et - elastic modulus ntawm raj phaj thiab raj khoom, MPa;

σ SP σ Qhov kev ntxhov siab ntawm st tube phaj thiab cov khoom siv raj, MPa;

Peb, Ut - Poisson qhov piv ntawm cov raj phaj thiab cov khoom siv raj;

C - Cov khoom siv thiab cov qauv coefficients ntawm cov kav dej thiab cov ntawv raj;

Txoj kab uas hla ntawm ib leeg qauv qauv rau kt, ks kav, thiab cov ntawv raj, kt=do/di, ks=Do/Di;

Cov pa luam yeeb raj thiab cov raj tuaj yeem xa mus rau qhov pom kev nthuav dav siab siv tus nqi. Thaum siv cov khoom tshwj xeeb tshwj xeeb kub pauv cov raj, kev ntsuas theoretical tuaj yeem ua ntej, thiab tom qab ntawd qhov tsim nyog siab ntau rau cov nplaum nthuav dav thiab lub zog nthuav dav tuaj yeem lees paub los ntawm kev simulation simulation kom ntseeg tau qhov kev ntseeg ntawm cov pob qij txha expansion.

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