{"id":23461,"date":"2025-02-21T06:24:38","date_gmt":"2025-02-21T05:24:38","guid":{"rendered":"https:\/\/diggaeurope.com\/a-propos-des-foreuses-terrestres\/"},"modified":"2026-04-22T06:27:55","modified_gmt":"2026-04-22T05:27:55","slug":"a-propos-des-foreuses-terrestres","status":"publish","type":"page","link":"https:\/\/diggaeurope.com\/fr\/a-propos-des-foreuses-terrestres\/","title":{"rendered":"\u00c0 propos des foreuses terrestres"},"content":{"rendered":"

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EN SAVOIR PLUS<\/span><\/h4>\n

SUR LES FOREUSES TERRESTRES<\/span><\/h1>\n

<\/span><\/p>\n

D\u00e9couvrez les diff\u00e9rents types de foreuses terrestres Digga disponibles, ainsi que leurs composants et leur entretien. Nous esp\u00e9rons que ces informations vous seront utiles. Visitez notre <\/span>FAQ<\/span><\/a> pour en savoir plus, ou <\/span>appelez-nous<\/span><\/a> d\u00e8s aujourd’hui.<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n

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INTRODUCTION<\/span><\/h5>\n

Foreuses terrestres<\/h2>\n

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Les foreuses sont actionn\u00e9es par des moteurs hydrauliques, qui fonctionnent gr\u00e2ce au syst\u00e8me hydraulique auxiliaire de la machine.
L’huile hydraulique d\u00e9bite dans le moteur par la conduite d’alimentation et ressort par la conduite de retour. Ce d\u00e9bit et cette pression d’huile g\u00e9n\u00e8rent la puissance n\u00e9cessaire pour faire tourner le moteur, qui est directement coupl\u00e9 \u00e0 un r\u00e9ducteur plan\u00e9taire. Contrairement au moteur, la bo\u00eete de vitesses poss\u00e8de son propre r\u00e9servoir d’huile, qui doit \u00eatre remplac\u00e9 \u00e0 intervalles r\u00e9guliers pour maintenir les performances et la long\u00e9vit\u00e9 du v\u00e9hicule. Survolez (ou appuyez, pour les appareils mobiles) les titres ci-dessous pour mettre en \u00e9vidence chaque partie d’une foreuse terrestre Digga.<\/span><\/p>\n

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glisser ><\/div>\n

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DRAIN DE CASE<\/span><\/h5>\n

Pourquoi en utiliser un ?<\/span><\/h2>\n

Dans certains moteurs hydrauliques, une vidange du carter est n\u00e9cessaire pour g\u00e9rer les fuites internes, l’accumulation de chaleur et l’\u00e9quilibre de la pression.<\/p>\n

Fuite interne et d\u00e9charge de pression<\/h3>\n

Tous les moteurs hydrauliques pr\u00e9sentent des fuites d’huile internes dues au jeu entre les composants. Ces fuites sont n\u00e9cessaires \u00e0 la lubrification, mais elles peuvent entra\u00eener une augmentation de la pression \u00e0 l’int\u00e9rieur du carter du moteur. Une conduite de vidange du carter permet \u00e0 l’exc\u00e8s d’huile de s’\u00e9chapper, ce qui \u00e9vite d’endommager les joints et de provoquer une d\u00e9faillance du moteur due \u00e0 une pression excessive. <\/p>\n

Dissipation de la chaleur<\/h3>\n

Les moteurs hydrauliques g\u00e9n\u00e8rent de la chaleur pendant leur fonctionnement, et une chaleur excessive peut endommager les joints et r\u00e9duire l’efficacit\u00e9. La vidange du carter permet \u00e0 une petite quantit\u00e9 d’huile de circuler, ce qui \u00e9vacue la chaleur et contribue au refroidissement. <\/p>\n

\u00c9quilibrer la pression du joint d’arbre<\/h3>\n

Les moteurs sans vidange de carter s’appuient sur l’\u00e9quilibrage de la pression interne, mais une contre-pression \u00e9lev\u00e9e dans la conduite de retour peut forcer l’huile \u00e0 franchir les joints d’arbre, ce qui entra\u00eene des fuites. Une purge de carter maintient une zone de basse pression \u00e0 l’int\u00e9rieur du carter du moteur, prot\u00e9geant ainsi les joints d’arbre des diff\u00e9rences de pression excessives. <\/p>\n

Applications \u00e0 haute pression<\/h3>\n

Les moteurs fonctionnant \u00e0 des pressions \u00e9lev\u00e9es ou \u00e0 des cycles d’utilisation \u00e9lev\u00e9s n\u00e9cessitent souvent des vidanges de carter parce qu’ils subissent des fuites internes et des accumulations de chaleur plus importantes. Cette situation est fr\u00e9quente dans les moteurs \u00e0 pistons radiaux, \u00e0 axe inclin\u00e9 et les moteurs Geroler\/Gerotor \u00e0 haute performance. <\/p>\n

Sans vidange de caisse<\/h3>\n

\u00c9clatement des joints de carter et\/ou d’arbre en raison de l’accumulation de pression, surchauffe (r\u00e9duction du rendement et de la dur\u00e9e de vie) et d\u00e9faillance pr\u00e9matur\u00e9e du moteur en raison d’une pression interne excessive.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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MOTEUR ET BO\u00ceTE DE VITESSES<\/h5>\n

Notations<\/h2>\n

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Chaque moteur hydraulique se voit attribuer une puissance nominale, exprim\u00e9e en kilowatts (kW) ou en chevaux (hp). Cette puissance refl\u00e8te la capacit\u00e9 du moteur \u00e0 g\u00e9rer une combinaison sp\u00e9cifique de d\u00e9bit hydraulique (mesur\u00e9 en litres par minute, ou L\/min) et de pression hydraulique (mesur\u00e9e en BAR). Pour garantir des performances et une long\u00e9vit\u00e9 optimales, il est important de comprendre les deux principales limites qui d\u00e9finissent les capacit\u00e9s de puissance du moteur : <\/p>\n