{"id":5319,"date":"2024-11-11T15:56:39","date_gmt":"2024-11-11T07:56:39","guid":{"rendered":"https:\/\/www.sevencrane.com\/?p=5319"},"modified":"2024-11-11T15:56:43","modified_gmt":"2024-11-11T07:56:43","slug":"causes-and-solutions-for-brake-failure-in-bridge-cranes","status":"publish","type":"post","link":"https:\/\/www.sevencrane.com\/fr\/causes-and-solutions-for-brake-failure-in-bridge-cranes\/","title":{"rendered":"Causes et solutions aux d\u00e9faillances des freins des ponts roulants"},"content":{"rendered":"<p>Dans les environnements industriels, les ponts roulants subissent parfois des d\u00e9faillances de freins, ce qui peut entra\u00eener le ph\u00e9nom\u00e8ne dangereux de \u00ab glissement de la charge \u00bb. Cela se produit lorsque le grutier arr\u00eate de soulever ou d&#039;abaisser la charge, mais que celle-ci continue de descendre, souvent au-del\u00e0 de la limite autoris\u00e9e de v\/100 (o\u00f9 v est la vitesse de levage nominale). Cela pr\u00e9sente de graves risques si la charge glisse jusqu&#039;au sol. Un autre probl\u00e8me survient lorsque le frein ne se desserre pas, ce qui restreint le m\u00e9canisme de levage, emp\u00eachant la grue d&#039;atteindre sa pleine capacit\u00e9 de levage.<\/p>\n\n\n\n<p><strong>Causes d&#039;un freinage incomplet<\/strong><\/p>\n\n\n\n<p>Un freinage incomplet, qui permet \u00e0 la charge de glisser, peut provenir de plusieurs facteurs :<\/p>\n\n\n\n<ul>\n<li>Usure : une utilisation fr\u00e9quente peut provoquer l&#039;usure des composants tels que les broches, les trous d&#039;\u00e9pingle et les plaquettes de frein, entra\u00eenant des variations de position du bras de frein et une r\u00e9duction du couple de freinage.<\/li>\n\n\n\n<li>Probl\u00e8mes de ressort : des ressorts principaux faibles ou mal r\u00e9gl\u00e9s r\u00e9duisent la force de freinage, souvent en raison d&#039;une mauvaise qualit\u00e9 du mat\u00e9riau ou de la fatigue.<\/li>\n\n\n\n<li>D\u00e9salignement : Un d\u00e9salignement radial de la roue de frein peut entra\u00eener une excentricit\u00e9, provoquant une r\u00e9duction de l&#039;efficacit\u00e9 du freinage.<\/li>\n\n\n\n<li>Jeu irr\u00e9gulier des plaquettes de frein : un contact irr\u00e9gulier entre les plaquettes de frein et la roue de frein r\u00e9duit le couple, souvent en raison d&#039;impr\u00e9cisions d&#039;installation ou de boulons desserr\u00e9s.<\/li>\n\n\n\n<li>Freins \u00e0 course longue obstru\u00e9s : le mat\u00e9riau de support sous le contrepoids peut r\u00e9duire le couple de freinage.<\/li>\n<\/ul>\n\n\n\n<p><strong>Solutions pour un freinage incomplet<\/strong><\/p>\n\n\n\n<p>Pour r\u00e9tablir un freinage fiable, les \u00e9tapes suivantes sont recommand\u00e9es :<\/p>\n\n\n\n<ul>\n<li>Remplacez les composants de frein us\u00e9s et \u00e9liminez toute obstruction.<\/li>\n\n\n\n<li>Nettoyez la roue de frein et les plaquettes avec du k\u00e9ros\u00e8ne ou de l\u2019essence pour \u00e9liminer les contaminants.<\/li>\n\n\n\n<li>R\u00e9aligner ou remplacer les roues de frein mal align\u00e9es.<\/li>\n\n\n\n<li>Ajustez les vis et les ressorts auxiliaires pour un jeu uniforme des plaquettes.<\/li>\n\n\n\n<li>R\u00e9installez les freins avec pr\u00e9cision pour assurer un alignement correct et retirez tout support suppl\u00e9mentaire sous les contrepoids.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane.jpg\" alt=\"Pont roulant de 85t\" class=\"wp-image-5104 lazyload\"\/><noscript><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane.jpg\" alt=\"Pont roulant de 85t\" class=\"wp-image-5104 lazyload\" srcset=\"https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane.jpg 800w, https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane-300x225.jpg 300w, https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane-768x576.jpg 768w, https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane-16x12.jpg 16w, https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane-428x321.jpg 428w, https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane-345x258.jpg 345w, https:\/\/d3fnmw4lwrx8lm.cloudfront.net\/wp-content\/uploads\/2024\/05\/28110643\/85t-overhead-crane-253x190.jpg 253w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/noscript><\/figure>\n\n\n\n<p><strong>Causes du blocage des freins<\/strong><\/p>\n\n\n\n<p>Lorsque les freins ne se rel\u00e2chent pas, les causes courantes sont les suivantes\u00a0:<\/p>\n\n\n\n<ul>\n<li>Panne de l&#039;\u00e9lectroaimant : une bobine d\u00e9connect\u00e9e arr\u00eate l&#039;aimant, emp\u00eachant le desserrage du frein et provoquant un bruit de moteur important.<\/li>\n\n\n\n<li>Tiges de frein pli\u00e9es : des tiges mal align\u00e9es peuvent g\u00eaner le mouvement, ce qui fait que le frein reste ferm\u00e9.<\/li>\n\n\n\n<li>Obstructions m\u00e9caniques : Les composants du m\u00e9canisme de freinage peuvent se gripper, bloquant ainsi la libre circulation.<\/li>\n<\/ul>\n\n\n\n<p><strong>Solutions pour le blocage des freins<\/strong><\/p>\n\n\n\n<p>Pour r\u00e9soudre les probl\u00e8mes de blocage des freins\u00a0:<\/p>\n\n\n\n<ul>\n<li>Remplacez ou reconnectez les bobines d\u00e9fectueuses.<\/li>\n\n\n\n<li>Redressez ou remplacez les tiges pli\u00e9es.<\/li>\n\n\n\n<li>Identifier et \u00e9liminer les obstacles pour assurer un fonctionnement fluide.<\/li>\n<\/ul>\n\n\n\n<p>La r\u00e9solution de ces probl\u00e8mes de freinage courants contribue \u00e0 am\u00e9liorer la s\u00e9curit\u00e9 et l&#039;efficacit\u00e9 de <a href=\"https:\/\/www.sevencrane.com\/fr\/pro_cat\/overhead-crane\/\">ponts roulants <\/a>op\u00e9rations, minimisant les risques lors de la manutention des mat\u00e9riaux.<\/p>","protected":false},"excerpt":{"rendered":"<p>Dans les environnements industriels, les ponts roulants subissent parfois des d\u00e9faillances de freins, ce qui peut conduire au ph\u00e9nom\u00e8ne dangereux de \u00ab glissement de la charge \u00bb. Cela se produit lorsque le grutier arr\u00eate de soulever ou d&#039;abaisser la charge, mais que celle-ci continue de descendre, souvent au-del\u00e0 de la limite autoris\u00e9e de v\/100 (o\u00f9 v est la vitesse de levage nominale). Cela pr\u00e9sente de graves risques\u2026<\/p>","protected":false},"author":2,"featured_media":4264,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Causes and Solutions for Brake Failure in Bridge Cranes<\/title>\n<meta name=\"description\" content=\"In industrial settings, bridge cranes occasionally experience brake failures, which can lead to the dangerous phenomenon of \u201cload slipping.\u201d\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sevencrane.com\/fr\/causes-and-solutions-for-brake-failure-in-bridge-cranes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" 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