{"id":3732,"date":"2026-01-20T17:24:31","date_gmt":"2026-01-20T16:24:31","guid":{"rendered":"https:\/\/sti2tech.com\/?page_id=3732"},"modified":"2026-01-22T09:21:15","modified_gmt":"2026-01-22T08:21:15","slug":"s","status":"publish","type":"page","link":"https:\/\/sti2tech.com\/?page_id=3732","title":{"rendered":"STI2D – 1\u00e8re PHI – TD n\u00b02"},"content":{"rendered":"\t\t
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TD n\u00b02 : Circuits pneumatiques<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Objectifs :<\/h3>

  • D\u00e9crire la cha\u00eene d\u2019\u00e9nergie pneumatique d\u2019un syst\u00e8me d\u2019ouverture de porte de bus<\/p><\/li>

  • Choisir et dimensionner les v\u00e9rins et les distributeurs adapt\u00e9s aux exigences<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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    Partie 1 – R\u00e9investissement des cours et activit\u00e9s pratiques pr\u00e9c\u00e9dentes<\/b><\/h4>

    Compl\u00e9ter<\/b> le tableau en identifiant les noms, les types et les commandes des \u00e9l\u00e9ments rep\u00e9r\u00e9s D1 et D2 sur le Document 1 ci-dessus.<\/p>

    \"\"<\/h4>
    • Les \u00e9l\u00e9ments D1 et D2 doivent d’alimenter l’un un v\u00e9rin simple effet, l’autre un v\u00e9rin double effet.
      1. Sur le Document 1, <\/span>dessiner<\/b> la repr\u00e9sentation sch\u00e9matique du v\u00e9rin simple effet et du v\u00e9rin <\/span>double effet en les raccordant \u00e0 l’\u00e9l\u00e9ment D1 ou D2 le plus adapt\u00e9 pour chacun. <\/span>Justifier<\/b> votre choix.<\/span><\/li>
      2. Expliquer<\/b> la diff\u00e9rence entre ces deux types de v\u00e9rin (v\u00e9rin simple effet et v\u00e9rin double effet).<\/span><\/li>
      3. Raccorder<\/b> les \u00e9l\u00e9ments D1 et D2 \u00e0 l’alimentation pneumatique et <\/span>repr\u00e9senter<\/b> les <\/span>\u00e9chappements. On consid\u00e8re les deux v\u00e9rins ayant leurs tiges sorties.<\/span><\/li>
      4. Indiquer<\/b>, pour les deux v\u00e9rins, ce qu’il se passe si l’\u00e9nergie \u00e9lectrique de commande est coup\u00e9e.<\/span><\/li><\/ol><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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        Partie 2 – Relations de base<\/h4>

        1 – Relations physiques de base<\/h5>
        1. A partir des notations ci-dessus, donner<\/b> la relation entre P, F et S\u00a0en pr\u00e9cisant les unit\u00e9s usuelles de chaque terme.<\/span><\/li>

        2. A partir des notations ci-dessus, donner<\/b> la relation entre Tc, Fth\u00e9o et Fr\u00e9el en pr\u00e9cisant les unit\u00e9s usuelles de chaque terme.<\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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          2 – Calcul de la surface utile<\/h5>
          • On consid\u00e8re Rp comme \u00e9tant le rayon du piston et Rt\u00a0le rayon de la tige<\/li><\/ul>

            \"\"<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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            1. \u00a0Donner<\/b> l’expression de la surface utile Suts<\/span> durant la phase de sortie de tige comme repr\u00e9sent\u00e9e ci dessus.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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              1. Donner<\/b> l’expression de la surface utile Sur dans le cas d\u2019une sortie de tige comme repr\u00e9sent\u00e9e ci-dessus.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                3 – Calculs de force<\/h5>
                1. A partir des donn\u00e9es fournies ci-dessus, calculer<\/b> en \ud835\udc41<\/span>, la force exerc\u00e9e lors de sortie de tige.<\/li>
                2. A partir des donn\u00e9es fournies ci-dessus, <\/span>calculer<\/b> en <\/span>\ud835\udc41<\/span>, la force exerc\u00e9e lors de la rentr\u00e9e de tige<\/span><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                  Partie 3 – Mise en application<\/h4>

                  • On souhaite pousser une charge \ud835\udc44<\/span> \u00e0 l’aide d’un v\u00e9rin pneumatique. L’effort Fp n\u00e9cessaire afin de d\u00e9placer la charge Q\u00a0a \u00e9t\u00e9 estim\u00e9 \u00e0 250 \ud835\udc41<\/span>.<\/p><\/li>

                  • On dispose d\u2019un r\u00e9seau d\u2019air comprim\u00e9 d\u00e9livrant l\u2019\u00e9nergie pneumatique sous une pression de 6 \ud835\udc4f\ud835\udc4e\ud835\udc5f\ud835\udc60<\/span>.<\/p><\/li><\/ul>

                    1. Calculer<\/b> la valeur minimale du diam\u00e8tre du piston n\u00e9cessaire pour d\u00e9placer la charge.<\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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                      • On souhaite pousser puis tirer une charge \ud835\udc44<\/span> \u00e0 l’aide d’un v\u00e9rin pneumatique. La pression dans le r\u00e9seau pneumatique est de 8 \ud835\udc4f\ud835\udc4e\ud835\udc5f\ud835\udc60<\/span>.<\/li>
                      • L’effort Fp<\/span>\u00a0n\u00e9cessaire afin de pousser la charge <\/span>\ud835\udc44<\/span> a \u00e9t\u00e9 estim\u00e9 \u00e0 <\/span>1450 \ud835\udc41<\/span>.<\/span><\/li>
                      • Afin de la repositionner, un effort Fp <\/span>de <\/span>1500 \ud835\udc41<\/span> est n\u00e9cessaire.<\/span><\/li>
                      • L\u2019espace disponible est limit\u00e9 et n\u00e9cessite que la tige du v\u00e9rin ait un <\/span>diam\u00e8tre de 20 mm<\/span>.<\/span><\/li><\/ul>

                        1. Calculer<\/b> la valeur minimale du diam\u00e8tre du piston n\u00e9cessaire pour d\u00e9placer la charge.<\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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                          Partie 4 – Mise en application<\/h4>
                          • On souhaite dimensionner un v\u00e9rin pneumatique permettant de lever ou baisser une borne escamotable.<\/li>
                          • La distance entre la position de la borne rentr\u00e9e et la position borne sortie est de 490mm.<\/span><\/li>
                          • La pression de l\u2019alimentation en \u00e9nergie pneumatique est de 7 bars.<\/span><\/li>
                          • La masse de la borne \u00e9tant de \u00a0l\u2019effort r\u00e9el \u00e0 fournir par le v\u00e9rin pour la lever est de 373 N.<\/span><\/li>
                          • On consid\u00e8re que les pertes par frottements sont de l\u2019ordre de 12%, soit un taux de charge de 88%.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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                            1. Calculer <\/b>la valeur minimale du diam\u00e8tre du piston n\u00e9cessaire pour d\u00e9placer la charge.<\/span><\/div><\/li>
                            2. D\u00e9terminer <\/b>l\u2019effort th\u00e9orique que doit exercer le v\u00e9rin.<\/span><\/div><\/li>

                            3. A l\u2019aide du document technique DTEC1, d\u00e9terminer<\/strong> le diam\u00e8tre du piston \u00e0 choisir pour le v\u00e9rin.<\/p><\/li><\/ol>

                              • Afin de prendre une marge de s\u00e9curit\u00e9 suppl\u00e9mentaire, on consid\u00e8re que l\u2019effort th\u00e9orique \u00e0 fournir pour sortir la tige est de 50 DaN.<\/li><\/ul>
                                1. A l\u2019aide du document technique DTEC1,
                                  donner <\/b>la r\u00e9f\u00e9rence compl\u00e8te du v\u00e9rin adapt\u00e9 \u00e0 cette application<\/span><\/div><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                                  Partie 5 – Les distributeurs<\/h4>
                                  • Compl\u00e9ter <\/b>le tableau suivant en donnant la d\u00e9nomination des distributeurs suivants<\/span><\/div><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                                    Documents techniques<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                                    TD n\u00b02 : Circuits pneumatiques Objectifs : D\u00e9crire la cha\u00eene d\u2019\u00e9nergie pneumatique d\u2019un syst\u00e8me d\u2019ouverture de porte de bus Choisir et dimensionner les v\u00e9rins et les distributeurs adapt\u00e9s aux exigences Partie 1 – R\u00e9investissement des cours et activit\u00e9s pratiques pr\u00e9c\u00e9dentes Compl\u00e9ter le tableau en identifiant les noms, les types et les commandes des \u00e9l\u00e9ments rep\u00e9r\u00e9s…<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"hide","_kad_post_layout":"fullwidth","_kad_post_sidebar_id":"","_kad_post_content_style":"unboxed","_kad_post_vertical_padding":"hide","_kad_post_feature":"hide","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"folder":[37],"class_list":["post-3732","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sti2tech.com\/index.php?rest_route=\/wp\/v2\/pages\/3732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sti2tech.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sti2tech.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sti2tech.com\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/sti2tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3732"}],"version-history":[{"count":11,"href":"https:\/\/sti2tech.com\/index.php?rest_route=\/wp\/v2\/pages\/3732\/revisions"}],"predecessor-version":[{"id":3785,"href":"https:\/\/sti2tech.com\/index.php?rest_route=\/wp\/v2\/pages\/3732\/revisions\/3785"}],"wp:attachment":[{"href":"https:\/\/sti2tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3732"}],"wp:term":[{"taxonomy":"folder","embeddable":true,"href":"https:\/\/sti2tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Ffolder&post=3732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}