{"id":73,"date":"2017-06-18T23:49:39","date_gmt":"2017-06-18T21:49:39","guid":{"rendered":"https:\/\/dbvib-consulting.com\/?p=73"},"modified":"2023-08-30T11:49:35","modified_gmt":"2023-08-30T09:49:35","slug":"recette-machine-tournante","status":"publish","type":"post","link":"https:\/\/dbvib-consulting.com\/recette-machine-tournante\/","title":{"rendered":"Recette machine tournante"},"content":{"rendered":"<h2 style=\"text-align: center\">Recette machine tournante<\/h2>\n<p>La recette vibratoire consiste \u00e0 garantir\u00a0le fonctionnement m\u00e9canique d&rsquo;une machine ou bien d&rsquo;en\u00a0 identifier des dysfonctionnements \u00e9ventuels.<\/p>\n<p>Sont concern\u00e9es, les machines de criticit\u00e9 1, c&rsquo;est-\u00e0-dire vitales ou pr\u00e9sentant un caract\u00e8re strat\u00e9gique (machine non doubl\u00e9e, dont on n&rsquo;a pas de pi\u00e8ces de rechange car elles sont co\u00fbteuses ou car elles n&rsquo;existent plus sur le march\u00e9, etc.).<\/p>\n<p>Afin d&rsquo;\u00e9tablir une recette vibratoire, il est n\u00e9cessaire d&rsquo;identifier le type de machine concern\u00e9e mais \u00e9galement\u00a0 de suivre une m\u00e9thodologie en fonction de l&rsquo;historique de cette derni\u00e8re tout en d\u00e9terminant le moment opportun pour l&rsquo;effectuer.<\/p>\n<p>R\u00e9alisation de la recette vibratoire:<\/p>\n<p>En partant du principe que l&rsquo;univers du parc machines est consid\u00e9rable, aucune machine n&rsquo;est comparable. En effet, d&rsquo;origines de fabrication diff\u00e9rentes mais aussi de conditions environnementales\u00a0(ch\u00e2ssis, conduites, isolation, supportage, temp\u00e9rature et pollution atmosph\u00e9riques&#8230;) et de fonctionnement (vitesse, d\u00e9bit, pression, temp\u00e9rature,\u00a0nature du fluide v\u00e9hicul\u00e9&#8230;) rarement similaires, il existe diff\u00e9rentes sources de dysfonctionnement g\u00e9n\u00e9ratrices de vibrations caract\u00e9ristiques.<\/p>\n<p>Nous pouvons les classifier en huit familles selon les ph\u00e9nom\u00e8nes suivants:<\/p>\n<ol>\n<li>p\u00e9riodiques\u00a0directement li\u00e9s \u00e0 la cin\u00e9matique de la machine (balourd, lignage, engr\u00e8nement&#8230;)<\/li>\n<li>p\u00e9riodiques non li\u00e9s \u00e0 la cin\u00e9matique de la machine (instabilit\u00e9s de paliers, couplage acoustique, fr\u00e9quences fant\u00f4mes, fissuration d&rsquo;arbre&#8230;) et les ph\u00e9nom\u00e8nes li\u00e9s \u00e0 la dilatation thermique<\/li>\n<li>\u00e0 caract\u00e8re al\u00e9atoire (cavitation, pompage, roulement) ;<\/li>\n<li>transitoires (choc) ;<\/li>\n<li>p\u00e9riodiques impulsifs (choc p\u00e9riodique), tels qu&rsquo;une dent d\u00e9t\u00e9rior\u00e9e sur un pignon, une patte de fixation cass\u00e9e, etc. ;<\/li>\n<li>de proximit\u00e9 de fr\u00e9quences excitatrices proches de fr\u00e9quences de r\u00e9sonance ou de fr\u00e9quences critiques d&rsquo;arbre ;<\/li>\n<li>d&rsquo;isolation directe ou indirecte ;<\/li>\n<li>li\u00e9s aux conditions de fonctionnement (accords acoustiques, tourbillons Von Karmann, cavitation&#8230;).<\/li>\n<\/ol>\n<p>Afin de r\u00e9aliser une recette vibratoire, il convient en fonction de la famille de machines de les classer en deux cat\u00e9gories:<\/p>\n<ul>\n<li>les machines \u00e0 vitesse variable ou fixe ;<\/li>\n<li>les machines \u00e0 paliers lisses ou \u00e0 roulement<\/li>\n<\/ul>\n<h4>La d\u00e9marche m\u00e9thodologique de base de dB Vib Consulting consiste \u00e0\u00a0:<\/h4>\n<ul>\n<li>Qualifier le comportement dynamique des paliers de la machine par des mesures de fonctions de transfert r\u00e9alis\u00e9es \u00e0 l\u2019arr\u00eat. Cette \u00e9tape permet d\u2019identifier les fr\u00e9quences de r\u00e9sonance de structure susceptibles d\u2019influencer la r\u00e9ponse vibratoire.<\/li>\n<li>Enregistrer les signaux vibratoires durant les phases d\u2019arr\u00eat et\/ou d\u00e9marrage afin de r\u00e9aliser des analyses d\u2019ordres de la fr\u00e9quence de rotation. La comparaison des r\u00e9ponses vibratoires de la machine excit\u00e9e par le balourd et ses harmoniques avec les r\u00e9sultats obtenus \u00e0 l\u2019arr\u00eat nous permet de dissocier les modes propres de structure et d\u2019arbre.<\/li>\n<li>Enregistrer les signaux vibratoires pour n conditions de fonctionnement (charge, d\u00e9bit\/pression, vitesses de rotation, \u2026) et lors des phases transitoires. La corr\u00e9lation des niveaux vibratoires avec les param\u00e8tres de fonctionnement nous permet de qualifier les sources d\u2019excitation et d\u2019orienter notre diagnostic.<\/li>\n<\/ul>\n<p>En fonction de l\u2019historique de la machine, des contraintes d\u2019exploitation et des observations, cette d\u00e9marche m\u00e9thodologique est \u00e0 adapter au cas par cas.<\/p>\n<p>Quant aux\u00a0instruments de mesures utilis\u00e9s, ils diff\u00e8rent selon chaque cas sp\u00e9cifique \u00e0 traiter.<\/p>\n<p>Nos experts utilisent aussi bien leurs\u00a0capteurs propres\u00a0(acc\u00e9l\u00e9rom\u00e8tres, capteurs de pression, jauges de contrainte, sondes de proximit\u00e9) dans la mesure o\u00f9 il est possible d\u2019instrumenter la machine que des capteurs install\u00e9s \u00e0 demeure\u00a0(acc\u00e9l\u00e9rom\u00e8tres, v\u00e9locim\u00e8tres, sondes de proximit\u00e9, donn\u00e9es process).<\/p>\n<p>Aussi, ils utilisent \u00e9galement des analyseurs- enregistreurs\u00a0multi-voies synchrones (4 \u00e0 40 voies par syst\u00e8me) qui permettent de collecter, enregistrer et analyser les signaux vibratoires. Le choix de ce type de mat\u00e9riel est essentiel pour les analyses de phases transitoires et de variations de conditions de fonctionnement.<\/p>\n<p>A quelle moment la r\u00e9alise-t-on ?<\/p>\n<p>La recette vibratoire peut \u00eatre mise en \u0153uvre\u00a0:<\/p>\n<ul>\n<li>Lors de la recette d\u2019une installation neuve en usine ou sur site,<\/li>\n<li>En fin de p\u00e9riode de garantie pour qualifier l\u2019\u00e9volution de comportement vibratoire de la machine par rapport \u00e0 sa mise en service<\/li>\n<li>Pour \u00e9tablir un \u00e9tat z\u00e9ro d\u2019une machine critique afin de r\u00e9aliser un suivi p\u00e9riodique,<\/li>\n<li>Avant des travaux de maintenance programm\u00e9s afin d\u2019adapter la nature des travaux aux besoins ou de proroger l\u2019arr\u00eat,<\/li>\n<li>Au terme de travaux de maintenance afin de valider les travaux r\u00e9alis\u00e9s,<\/li>\n<li>Pour expliquer des niveaux vibratoires importants ou des d\u00e9gradations r\u00e9currentes.<\/li>\n<\/ul>\n<p style=\"text-align: center\"><a href=\"https:\/\/dbvib-consulting.com\/contact-db-vib-consulting\/\"><span class=\"button--full\">Nous contacter\u00a0<\/span><\/a><\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-366 \" src=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2.png\" alt=\"recette machine tournante\" width=\"525\" height=\"394\" srcset=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2.png 1201w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2-300x225.png 300w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2-768x576.png 768w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2-1024x768.png 1024w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2-900x675.png 900w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2-440x330.png 440w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2-200x150.png 200w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2017\/06\/recette_machine_tournante_2-315x236.png 315w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recette machine tournante La recette vibratoire consiste \u00e0 garantir\u00a0le fonctionnement m\u00e9canique d&rsquo;une machine ou bien d&rsquo;en\u00a0 identifier des dysfonctionnements \u00e9ventuels. Sont concern\u00e9es, les machines de criticit\u00e9 1, c&rsquo;est-\u00e0-dire vitales ou pr\u00e9sentant un caract\u00e8re strat\u00e9gique (machine non doubl\u00e9e, dont on n&rsquo;a pas de pi\u00e8ces de rechange car elles sont co\u00fbteuses ou car elles n&rsquo;existent plus sur [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":820,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-73","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-etudes-et-expertises"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Recette machine tournante - dB Vib Consulting<\/title>\n<meta name=\"description\" content=\"La recette vibratoire d&#039;une machine tournante consiste \u00e0 garantir son fonctionnement m\u00e9canique ou bien d\u2019en identifier des dysfonctionnements \u00e9ventuels.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dbvib-consulting.com\/recette-machine-tournante\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Recette machine tournante - 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