Abstract
ANALYSIS OF CONTACT PROBLEMS IN ELASTIC—PLASTIC METAL SEALS/TAMPRIŲJŲ METALINIŲ SANDARIKLIŲ KONTAKTINĖS SĄVEIKOS TYRIMAS
Highlights
One of the most important problems in the design of seal joints is the optimisation of their shape and the material properties
This paper presents the results of the numerical simulation of conical and cantilever seal joints contact problems by using the finite element system ANSYS S.OA The temperature and friction have been taken into account
The sealing principle of conical seals, which are usually used as flange joints in networks of pipes, is based on large plastic deformations of seal edges and maintaining the highly elastic property of the whole construction of the seal
Summary
Kiiginis sandariklis naudojamas vamzdynq flan§iniuose sujungimuose [5]. Sandarinimo principas cia grindfiamas nemafomis i sandarinamus paviriius remianciqsi sandariklio briaunq plastinemis deformacijomis ir sandariklio konstrukcijos tampriosiomis savybemis, kompensuojanaomis sandarinamq paviriiq geometrijos netobulumus ir sujungi~ veikianaq jegq sukeltus poslinkius. Pateikiamos kiiginio sandariklio (sl:llyginis skersmuo 300 mm) kontaktines jegos priklausomybes nuo ivedimo 1 - E = 2,1·Hf MPa, cry = 280 MPa, Ek1 =7000 MPa (& ~ 0,0125), Ek2=2500 MPa (0,0125< & ~ 0,0125), Ek3 = 600 MPa (0,1 < & ~ 0,3 ), Ek4 = 1000 MPa (~> > 0,3), 2 - E=2,1·Hf MPa, cry= 200 MPa, Ek = 5·103 MPa; 3 - E=2,1·Hf MPa, cry= 500 MPa, Ek = 3·103 MPa. Nustatytas svarbiausias standartizuotq didesniq nei 100 mm skersmens kiiginiq sandarikliq deformavimo desningumas: kai apspaudimo dydis pagal med.Ziagos takumo ribl:l ir stiprejimo desni vidija 0,7 - 1,3 mm, sandariklis suklumpa, paprastai antr~a nestabilumo forma. (kreive 4) pateikiama ivedimo jegos priklausomybe nuo deformavimo dyd.Zio, kai darbo terpes slegis 40 MPa. Matome, kad kontaktine jega padideja ne daugiau kaip 100/o, nors stabilumas prarandamas kiek veliau (1,4 mm). Iinginio sandariklio maksimaliq itempimq intensyvumo crx, kontaktinio slegio jegos F ir kontaktinio slegio q1 reiksmiq priklausomybe nuo jo santykinio skersmens
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