{"id":472,"date":"2026-09-27T16:54:54","date_gmt":"2026-09-27T16:54:54","guid":{"rendered":"https:\/\/zhuoruimech.com\/?p=472"},"modified":"2026-09-27T16:54:54","modified_gmt":"2026-09-27T16:54:54","slug":"dimensionnement-des-orifices-dun-verin-hydraulique-debit-perte-de-charge","status":"publish","type":"post","link":"https:\/\/zhuoruimech.com\/fr\/hydraulic-cylinder-port-sizing-flow-pressure-drop\/","title":{"rendered":"Dimensionnement des raccords des v\u00e9rins hydrauliques : d\u00e9bit, perte de charge et caract\u00e9ristiques des raccords"},"content":{"rendered":"<p>A cylinder can have the right bore, stroke and pressure rating yet still move too slowly because oil cannot pass through its ports, fittings and lines efficiently. Port size is a system choice. It depends on the peak flow entering and leaving the cylinder, the connection standard and the circuit&#8217;s acceptable pressure loss.<\/p>\n<h2>Calculer le d\u00e9bit aux deux extr\u00e9mit\u00e9s<\/h2>\n<p>Pour une vitesse cible du piston, le d\u00e9bit \u00e0 l'extr\u00e9mit\u00e9 du chapeau est \u00e9gal \u00e0 la section de l'al\u00e9sage multipli\u00e9e par la vitesse. Le d\u00e9bit \u00e0 l'extr\u00e9mit\u00e9 de la tige est \u00e9gal \u00e0 la section annulaire multipli\u00e9e par la vitesse. Dans un v\u00e9rin \u00e0 tige unique classique, ces deux d\u00e9bits diff\u00e8rent ; il ne faut donc pas dimensionner la conduite de retour en se contentant de reprendre la valeur de la conduite de pression. Un circuit r\u00e9g\u00e9n\u00e9ratif modifie \u00e0 nouveau le trajet d'\u00e9coulement. Il convient de se baser sur la vitesse maximale pr\u00e9vue et de prendre en compte les conditions transitoires plut\u00f4t que de se limiter au cycle normal.<\/p>\n<h2>V\u00e9rifiez le chemin d'acc\u00e8s complet<\/h2>\n<p>Des pertes de pression se produisent au niveau des raccords, des coudes, des adaptateurs, des flexibles, des passages de vannes et des filtres. Un raccord filet\u00e9 de plus grand diam\u00e8tre sur le v\u00e9rin ne peut pas compenser un raccord \u00e0 section r\u00e9duite situ\u00e9 imm\u00e9diatement en aval. V\u00e9rifiez le diam\u00e8tre int\u00e9rieur et la longueur des flexibles, le rayon de courbure minimal, les passages du collecteur, le type de raccord et le cheminement de toute vanne de maintien de charge. V\u00e9rifiez \u00e0 la fois la pression de service nominale et le d\u00e9bit admissible de chaque composant.<\/p>\n<h2>Pourquoi un port surdimensionn\u00e9 ne constitue pas toujours une simple mise \u00e0 niveau<\/h2>\n<p>Certaines gammes de v\u00e9rins proposent des orifices surdimensionn\u00e9s ou suppl\u00e9mentaires pour les applications \u00e0 vitesse \u00e9lev\u00e9e. Leurs catalogues indiquent \u00e9galement des modifications apport\u00e9es aux bossages et aux cotes. Parker signale tout particuli\u00e8rement qu\u2019un d\u00e9bit instantan\u00e9 \u00e9lev\u00e9 \u00e0 l\u2019extr\u00e9mit\u00e9 du capuchon peut affecter certains composants de la soupape d\u2019amortissement dans l\u2019une de ses s\u00e9ries de v\u00e9rins. Il s\u2019agit d\u2019une mise en garde sp\u00e9cifique \u00e0 un mod\u00e8le, mais elle illustre pourquoi le choix des orifices, des dispositifs d\u2019amortissement et des soupapes doit \u00eatre examin\u00e9 dans son ensemble plut\u00f4t que modifi\u00e9 isol\u00e9ment.<\/p>\n<h2>D\u00e9roulement de l'examen pratique<\/h2>\n<ol>\n<li>D\u00e9finissez la vitesse maximale d'extension et de r\u00e9traction, puis calculez le d\u00e9bit de chaque c\u00f4t\u00e9.<\/li>\n<li>Temp\u00e9rature de fonctionnement maximale et plage de viscosit\u00e9 du fluide, y compris au d\u00e9marrage \u00e0 froid.<\/li>\n<li>Estimate line and component losses at peak flow; check the valve&#8217;s published curves.<\/li>\n<li>V\u00e9rifiez la norme relative au filetage ou \u00e0 la bride, le type de joint, l'orientation des orifices et l'acc\u00e8s pour la cl\u00e9.<\/li>\n<li>V\u00e9rifiez \u00e0 nouveau l'amortissement et le comportement au freinage avec la configuration finale de la ligne.<\/li>\n<\/ol>\n<p>Veuillez envoyer le sch\u00e9ma du circuit et le rapport cyclique avec le <a href=\"https:\/\/zhuoruimech.com\/fr\/liste-de-controle-pour-les-demandes-de-devis-de-verins-hydrauliques-sur-mesure\/\">Demande de devis pour des v\u00e9rins sur mesure<\/a>. Pour en savoir plus sur la relation entre le d\u00e9bit, la section et la vitesse, consultez notre <a href=\"https:\/\/zhuoruimech.com\/fr\/explication-de-la-vitesse-du-debit-et-de-la-section-dun-verin-hydraulique\/\">Guide des vitesses des cylindres<\/a>. Final values need the selected component manufacturers&#8217; data.<\/p>\n<p><small>R\u00e9f\u00e9rences : <a href=\"https:\/\/www.parker.com\/content\/dam\/Parker-com\/Literature\/Industrial-Cylinder\/cylinder\/cat\/english\/HY08_1130_4_NA.pdf\">Guide sur les orifices des v\u00e9rins Parker s\u00e9rie 3L<\/a>; <a href=\"https:\/\/www.parker.com\/literature\/Schrader%20Bellows\/Schrader\/Cat\/English\/SB0106-8_SectionC.pdf\">Tableaux indiquant les dimensions des raccords Parker et la vitesse des pistons<\/a>. Couverture : illustration sch\u00e9matique originale.<\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>D\u00e9couvrez pourquoi le choix des orifices d'un v\u00e9rin doit tenir compte du d\u00e9bit c\u00f4t\u00e9 chapeau et c\u00f4t\u00e9 tige, des pertes de charge, du trac\u00e9 des flexibles et de l'amortissement en fin de course.<\/p>","protected":false},"author":1,"featured_media":471,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yj_news_hero_background_id":0,"_yj_news_eyebrow":"","_yj_news_technical_topic":"","_yj_news_cta_title":"","_yj_news_cta_description":"","_yj_news_cta_label":"","_yj_news_cta_url":"","_yj_news_related_product_ids":[],"_yj_news_related_case_ids":[],"footnotes":""},"categories":[50],"tags":[],"class_list":["post-472","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.1) - 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