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Numerical model of a tandem reciprocating hydraulic rod seal / Bo Yang in Transactions of the ASME . Journal of tribology, Vol. 130 n°3 (Juillet 2008) 

Public ISBD [article]  in Transactions of the ASME . Journal of tribology > Vol. 130 n°3 (Juillet 2008) . - 7 p. Titre : Numerical model of a tandem reciprocating hydraulic rod seal Type de document : texte imprimé Auteurs : Bo Yang, Auteur ; Richard F. Salant, Auteur Année de publication : 2008 Article en page(s) : 7 p. Note générale : Tribology Langues : Anglais (eng) Mots-clés : Fluid  mechanics  Deformation  Computer  simulation  Surface  roughness  Sealing  (Process)  Contact  mechanics  Steady  state  Leakage  Pressure  Fluids Résumé : A numerical model of a tandem reciprocating hydraulic rod seal, consisting of two elastomeric U cup seals, has been constructed. It is applicable to cases in which the stroke length is significantly larger than the seal width. The model consists of coupled steady state fluid mechanics, deformation mechanics, and contact mechanics analyses, with an iterative computational procedure. The behaviors of the two seals are coupled through the pressure∕density in the interseal region and through flow continuity. Results for a typical tandem seal are compared to those of a single seal and a double lip seal. En ligne : http://tribology.asmedigitalcollection.asme.org/article.aspx?articleid=1468077 [article] Numerical model of a tandem reciprocating hydraulic rod seal [texte imprimé] / Bo Yang, Auteur ; Richard F. Salant, Auteur . - 2008 . - 7 p. Tribology Langues : Anglais (eng) in Transactions of the ASME . Journal of tribology > Vol. 130 n°3 (Juillet 2008) . - 7 p. Mots-clés : Fluid  mechanics  Deformation  Computer  simulation  Surface  roughness  Sealing  (Process)  Contact  mechanics  Steady  state  Leakage  Pressure  Fluids Résumé : A numerical model of a tandem reciprocating hydraulic rod seal, consisting of two elastomeric U cup seals, has been constructed. It is applicable to cases in which the stroke length is significantly larger than the seal width. The model consists of coupled steady state fluid mechanics, deformation mechanics, and contact mechanics analyses, with an iterative computational procedure. The behaviors of the two seals are coupled through the pressure∕density in the interseal region and through flow continuity. Results for a typical tandem seal are compared to those of a single seal and a double lip seal. En ligne : http://tribology.asmedigitalcollection.asme.org/article.aspx?articleid=1468077

Visco-elastohydrodynamic model of a hydraulic rod seal during transient operation / Azam Thatte in Transactions of the ASME . Journal of tribology, Vol. 132 N° 4 (Octobre 2010) 

Public ISBD [article]  in Transactions of the ASME . Journal of tribology > Vol. 132 N° 4 (Octobre 2010) . - 13 p. Titre : Visco-elastohydrodynamic model of a hydraulic rod seal during transient operation Type de document : texte imprimé Auteurs : Azam Thatte, Auteur ; Richard F. Salant, Auteur Année de publication : 2011 Article en page(s) : 13 p. Note générale : Tribology Langues : Anglais (eng) Mots-clés : Cavitation  Deformation  Finite  element  analysis  Finite  volume  methods  Friction  Hydraulic  systems  Hydrodynamics  Poiseuille  flow  Rods  (structures)  Sealing  materials  Viscoelasticity Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A visco-elastohydrodynamic model of a hydraulic rod seal during transient operation has been developed. The model includes analyses of the macro- and microscale deformation mechanics and contact mechanics, and the microscale fluid mechanics. Viscoelasticity enters the analysis through the deformation mechanics and through the contact mechanics. A hybrid finite element-finite volume computational framework is developed to solve the highly coupled governing equations. Viscoelasticity is seen to affect the leakage and friction characteristics of the seal through its effects on the changing fluid pressure and contact pressure distributions as the rod velocity and sealed pressure change during a cycle. Compared with purely elastic behavior, viscoelasticity increases the fluid pressure and the contact pressure significantly in the sealing region closest to the sealed end, shifts the fluid pressure peaks away from the sealed end during the instroke, and enhances the cavitation during the outstroke. It results in thicker fluid films and produces a significant increase in the Poiseuille flow during the instroke. DEWEY : 621.5 ISSN : 0742-4787 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JOTRE900013 [...] [article] Visco-elastohydrodynamic model of a hydraulic rod seal during transient operation [texte imprimé] / Azam Thatte, Auteur ; Richard F. Salant, Auteur . - 2011 . - 13 p. Tribology Langues : Anglais (eng) in Transactions of the ASME . Journal of tribology > Vol. 132 N° 4 (Octobre 2010) . - 13 p. Mots-clés : Cavitation  Deformation  Finite  element  analysis  Finite  volume  methods  Friction  Hydraulic  systems  Hydrodynamics  Poiseuille  flow  Rods  (structures)  Sealing  materials  Viscoelasticity Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A visco-elastohydrodynamic model of a hydraulic rod seal during transient operation has been developed. The model includes analyses of the macro- and microscale deformation mechanics and contact mechanics, and the microscale fluid mechanics. Viscoelasticity enters the analysis through the deformation mechanics and through the contact mechanics. A hybrid finite element-finite volume computational framework is developed to solve the highly coupled governing equations. Viscoelasticity is seen to affect the leakage and friction characteristics of the seal through its effects on the changing fluid pressure and contact pressure distributions as the rod velocity and sealed pressure change during a cycle. Compared with purely elastic behavior, viscoelasticity increases the fluid pressure and the contact pressure significantly in the sealing region closest to the sealed end, shifts the fluid pressure peaks away from the sealed end during the instroke, and enhances the cavitation during the outstroke. It results in thicker fluid films and produces a significant increase in the Poiseuille flow during the instroke. DEWEY : 621.5 ISSN : 0742-4787 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JOTRE900013 [...]