{"id":15377,"date":"2025-02-08T03:28:55","date_gmt":"2025-02-08T03:28:55","guid":{"rendered":"https:\/\/hydraflu.com\/?p=15377"},"modified":"2025-02-08T03:31:01","modified_gmt":"2025-02-08T03:31:01","slug":"how-to-calculate-hydraulic-press","status":"publish","type":"post","link":"https:\/\/hydraflu.com\/fr\/comment-calculer-une-presse-hydraulique\/","title":{"rendered":"Comment calculer la pression hydraulique pour les syst\u00e8mes hydrauliques existants et nouveaux"},"content":{"rendered":"

Vous connaissez peut-\u00eatre ces engins impressionnants qui soul\u00e8vent des tonnes d'acier ou qui d\u00e9foncent le b\u00e9ton. Vous vous demandez alors d'o\u00f9 provient toute cette puissance. Il s'agit de la pression hydraulique. Comme pour toutes les autres exigences de conception m\u00e9canique, celle-ci est calcul\u00e9e et dimensionn\u00e9e avant la mise en service des machines hydrauliques. Dans cet article, vous apprendrez \u00e0 calculer la pression hydraulique.<\/p>\n

Comprendre les composants de base d'un syst\u00e8me hydraulique<\/h2>\n

Pour bien comprendre la pression hydraulique, il faut se rappeler les composants de base d'un syst\u00e8me hydraulique. Un syst\u00e8me hydraulique est compos\u00e9 de\u00a0: pompes hydrauliques<\/a>, vannes<\/a>, cylindres et huile hydraulique<\/a> avec quelques actionneurs, le tout fonctionnant en parfaite harmonie. La pompe hydraulique est le c\u0153ur du syst\u00e8me\u00a0; elle propulse le fluide hydraulique dans les canalisations.<\/p>\n

Les vannes hydrauliques contr\u00f4lent la circulation du fluide, et le v\u00e9rin convertit cette pression en force m\u00e9canique. Pour simplifier, imaginez que vous appuyez sur une seringue remplie d'huile. Un syst\u00e8me hydraulique fonctionne selon le m\u00eame principe, mais \u00e0 une \u00e9chelle bien plus importante, capable de soulever un b\u00e2timent entier.<\/p>\n

Formule des cylindres et actionneurs\u00a0:<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

Symbole<\/strong><\/p>\n<\/td>\n

Description<\/strong><\/td>\nUnit\u00e9s<\/strong><\/td>\n<\/tr>\n
\n

Q<\/p>\n<\/td>\n

\n

D\u00e9bit<\/p>\n<\/td>\n

\n

l\/min<\/p>\n<\/td>\n<\/tr>\n

\n

A<\/p>\n<\/td>\n

\n

Surface nette<\/p>\n<\/td>\n

\n

Cm2<\/sup><\/p>\n<\/td>\n<\/tr>\n

\n

v<\/p>\n<\/td>\n

\n

Vitesse du piston<\/p>\n<\/td>\n

\n

m\/s<\/p>\n<\/td>\n<\/tr>\n

F<\/td>\n\n

Forcer<\/p>\n<\/td>\n

\n

N<\/p>\n<\/td>\n<\/tr>\n

p<\/td>\nPression<\/td>\n\n

Bar<\/p>\n<\/td>\n<\/tr>\n

D<\/td>\nAl\u00e9sage du cylindre<\/td>\n\n

cm<\/p>\n<\/td>\n<\/tr>\n

\n

d<\/p>\n<\/td>\n

Diam\u00e8tre de la tige<\/td>\n\n

cm<\/p>\n<\/td>\n<\/tr>\n

\n

V<\/p>\n<\/td>\n

Volume<\/td>\n\n

litres<\/p>\n<\/td>\n<\/tr>\n

L<\/td>\nLongueur de la course<\/td>\n\n

cm<\/p>\n<\/td>\n<\/tr>\n

t<\/td>\nTemps de course<\/td>\n\n

seconde<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Surface nette c\u00f4t\u00e9 piston : A = (\u03c0\u00d7D^2)\/4<\/p>\n

C\u00f4t\u00e9 tige de surface nette\u00a0: A= \u03c0\/4\u00d7 (D^2-d^2)<\/p>\n

Force du cylindre : F = A \u00d7 p \u00d7 10<\/p>\n

Volume du cylindre : V = (A \u00d7 L) \/ 1000<\/p>\n

D\u00e9bit requis : Q = A \u00d7 v \u00d7 6<\/p>\n

Dur\u00e9e de la course : t = (0,06 \u00d7 A \u00d7 L) \/ Q<\/p>\n

Ou dur\u00e9e de la course : t = (60 \u00d7 v)\/Q<\/p>\n

Puissance : P = (F\u00d7V)\/1000<\/p>\n

 <\/p>\n

Formule des pompes et moteurs\u00a0:<\/h2>\n\n\n\n\n\n\n\n\n\n
\n

Symbole<\/strong><\/p>\n<\/td>\n

Description<\/strong><\/td>\nUnit\u00e9s<\/strong><\/td>\n<\/tr>\n
\n

Q<\/p>\n<\/td>\n

D\u00e9bit<\/td>\nl\/min<\/td>\n<\/tr>\n
\n

V<\/p>\n<\/td>\n

D\u00e9placement<\/td>\n\n

cc<\/p>\n<\/td>\n<\/tr>\n

\n

n<\/p>\n<\/td>\n

\n

Vitesse de l'arbre<\/p>\n<\/td>\n

\n

tr\/min<\/p>\n<\/td>\n<\/tr>\n

P<\/td>\nPouvoir<\/td>\n\n

kW<\/p>\n<\/td>\n<\/tr>\n

\n

T<\/p>\n<\/td>\n

Couple<\/td>\n\n

Nm<\/p>\n<\/td>\n<\/tr>\n

\n

p<\/em><\/p>\n<\/td>\n

Pression<\/td>\n\n

Bar<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Power – Pump: P= (Q\u00d7p<\/em>)\/600<\/p>\n

Power – Motor: P= (T\u00d7n)\/9549<\/p>\n

D\u00e9bit : Q = (V\u00d7n)\/1000<\/p>\n

Couple : T= (p<\/em>\u00d7V)\/(20\u00d7\u03c0)<\/p>\n

\"calcul<\/p>\n

R\u00e8gles de conception cl\u00e9s<\/h2>\n
    \n
  1. Coh\u00e9rence des unit\u00e9s<\/strong>: Usage strictement r\u00e9serv\u00e9\u00a0cm\u00b2<\/strong>\u00a0pour la zone,\u00a0Bar<\/strong>\u00a0pour la pression, et\u00a0N<\/strong>\u00a0pour la force.<\/li>\n
  2. Marge de s\u00e9curit\u00e9<\/strong>: Fonctionner \u00e0 \u226480% des valeurs nominales de pression des composants.<\/li>\n
  3. efficacit\u00e9 \u00e9nerg\u00e9tique<\/strong>: V\u00e9rifier l'alimentation \u00e0 l'aide de\u00a0P=(Q\u00d7p)\/600<\/span><\/span><\/li>\n
  4. Validation dynamique<\/strong>: Utiliser\u00a0t=(0,06\u00d7A\u00d7L)\/Q <\/span><\/span>pour v\u00e9rifier les temps de cycle.<\/li>\n<\/ol>\n

    Note critique<\/strong>Les syst\u00e8mes sous-dimensionn\u00e9s pr\u00e9sentent un risque de d\u00e9faillance\u00a0; les syst\u00e8mes surdimensionn\u00e9s gaspillent de l\u2019\u00e9nergie. Il est imp\u00e9ratif de toujours valider les syst\u00e8mes \u00e0 l\u2019aide d\u2019un logiciel de simulation hydraulique.<\/span><\/p>","protected":false},"excerpt":{"rendered":"

    You may know those monster machines lifting tons of steel or bulldozing through concrete. You might then wonder what all that power is. It is […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-15377","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"yoast_head":"\nHow to Calculate Hydraulic Pressure for Existing and New Hydraulic Systems - 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