{"id":9634,"date":"2023-12-21T15:24:06","date_gmt":"2023-12-21T07:24:06","guid":{"rendered":"https:\/\/www.zmsbearing.com\/?p=9634"},"modified":"2025-08-06T21:08:35","modified_gmt":"2025-08-06T13:08:35","slug":"ntn-developpe-de-nouveaux-roulements-a-revetement-isolant-qui-resistent-a-la-corrosion-electrique","status":"publish","type":"post","link":"https:\/\/www.zmsbearing.com\/fr\/ntn-newly-develops-insulating-coated-bearings-that-are-resistant-to-electrical-corrosion\/","title":{"rendered":"NTN d\u00e9veloppe de nouveaux \"roulements \u00e0 rev\u00eatement isolant\" r\u00e9sistants \u00e0 la corrosion \u00e9lectrique"},"content":{"rendered":"

NTN Co., Ltd. (ci-apr\u00e8s d\u00e9nomm\u00e9e NTN) a d\u00e9velopp\u00e9 le syst\u00e8me \"roulements \u00e0 rev\u00eatement isolant<\/strong>\"Les v\u00e9hicules \u00e9lectriques et hybrides sont dot\u00e9s d'un syst\u00e8me \u00e0 trois essieux (e-Axle) qui r\u00e9siste \u00e0 la corrosion \u00e9lectrique.<\/p>\n\n\n\n

NTN a d\u00e9pos\u00e9 une couche de film isolant sur le diam\u00e8tre ext\u00e9rieur et la face frontale de la bague ext\u00e9rieure du roulement pour emp\u00eacher le courant \u00e9lectrique de circuler \u00e0 l'int\u00e9rieur du roulement. Il peut supporter des tensions sup\u00e9rieures \u00e0 100V et poss\u00e8de de bonnes propri\u00e9t\u00e9s d'isolation, ce qui correspond \u00e0 la tendance du march\u00e9 des v\u00e9hicules \u00e0 haute tension \u00e0 \u00e9nergie nouvelle.<\/p>\n\n\n\n

\"Roulements
Roulements \u00e0 rev\u00eatement isolant e-Axle<\/figcaption><\/figure>\n\n\n\n
\"Application
Application des roulements \u00e0 rev\u00eatement isolant partie rouge<\/figcaption><\/figure>\n\n\n\n

Historique de la R&D<\/strong><\/p>\n\n\n\n

Ces derni\u00e8res ann\u00e9es, diverses industries ont encourag\u00e9 la d\u00e9carbonisation et la r\u00e9duction des \u00e9missions, de sorte que le march\u00e9 de l'automobile acc\u00e9l\u00e8re \u00e9galement le d\u00e9veloppement et la popularisation de mod\u00e8les respectueux de l'environnement, notamment les v\u00e9hicules \u00e9lectriques et hybrides. Ces voitures, dont la principale source d'\u00e9nergie est le moteur, sont \u00e9quip\u00e9es d'un syst\u00e8me d'essieu \u00e9lectronique qui combine les moteurs, les inverseurs et les r\u00e9ducteurs en un seul syst\u00e8me.<\/p>\n\n\n\n

L'e-Axle est actionn\u00e9 par l'\u00e9lectricit\u00e9, mais des \u00e9tincelles \u00e9lectriques sont g\u00e9n\u00e9r\u00e9es lorsque le courant passe \u00e0 l'int\u00e9rieur du roulement, ce qui entra\u00eene la corrosion et le d\u00e9collement de la structure m\u00e9tallique. C'est pourquoi les roulements utilis\u00e9s dans les syst\u00e8mes tri-\u00e9lectriques doivent surmonter la corrosion \u00e9lectrique caus\u00e9e par les fuites de courant.<\/p>\n\n\n\n

Avantages des produits de R&D<\/strong><\/h2>\n\n\n\n

R\u00e9sistance \u00e0 la corrosion \u00e9lectrique<\/h3>\n\n\n\n

En appliquant un rev\u00eatement isolant sur le diam\u00e8tre ext\u00e9rieur et la face frontale de la bague ext\u00e9rieure du roulement, le courant passant \u00e0 l'int\u00e9rieur du roulement est affaibli, ce qui le rend suffisamment isolant pour r\u00e9sister \u00e0 des tensions sup\u00e9rieures \u00e0 100V. La tension que les roulements de moteur supportent est g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 10% de la tension de la batterie, de sorte que les roulements peuvent s'adapter m\u00eame si la tension de la batterie augmente jusqu'\u00e0 800V \u00e0 l'avenir.<\/p>\n\n\n\n

Dissipation de la chaleur<\/h3>\n\n\n\n

Comme l'\u00e9paisseur du rev\u00eatement tient compte \u00e0 la fois de la r\u00e9sistance \u00e0 la corrosion \u00e9lectrique et de la dissipation de la chaleur, il pr\u00e9sente les m\u00eames propri\u00e9t\u00e9s de dissipation de la chaleur que les produits standard non rev\u00eatus.<\/p>\n\n\n\n

R\u00e9sistance \u00e0 l'usure<\/h3>\n\n\n\n

Le film isolant a un faible coefficient de frottement et une bonne r\u00e9sistance \u00e0 l'usure. Par rapport aux produits standard sans rev\u00eatement, il peut r\u00e9duire l'usure totale du diam\u00e8tre ext\u00e9rieur de la bague ext\u00e9rieure et de la paroi int\u00e9rieure de la bo\u00eete de roulement de 88%. M\u00eame si un glissement se produit dans la bague ext\u00e9rieure fixe, l'\u00e9paisseur du rev\u00eatement n\u00e9cessaire \u00e0 l'isolation peut \u00eatre garantie.<\/p>\n\n\n\n

Surface ext\u00e9rieure de la piste de course apr\u00e8s l'essai de corrosion \u00e9lectrique<\/h2>\n\n\n\n

Les produits standard provoquent des dommages sous forme de plaques ondul\u00e9es, propres \u00e0 la corrosion \u00e9lectrique.
En outre, le rev\u00eatement isolant d\u00e9velopp\u00e9 cette fois-ci peut \u00eatre appliqu\u00e9 \u00e0 divers roulements NTN sur e-Axle, y compris les roulements \u00e0 grande vitesse de NTN. roulements \u00e0 billes \u00e0 gorge profonde<\/mark><\/a><\/em><\/strong>.<\/p>\n\n\n\n

\"Roulements
Roulements standard<\/figcaption><\/figure>\n\n\n\n
\"Paliers

Paliers isol\u00e9s<\/figcaption><\/figure>\n\n\n\n

Corrosion \u00e9lectrique de l'e-Axle<\/h3>\n\n\n\n

Afin d'augmenter la dur\u00e9e de vie des batteries des v\u00e9hicules \u00e0 \u00e9nergie nouvelle et de r\u00e9duire le temps de charge des batteries, la tension des batteries des v\u00e9hicules \u00e9lectriques est de plus en plus \u00e9lev\u00e9e. On s'attend \u00e0 ce que les batteries de 800 V soient populaires \u00e0 l'avenir, mais l'impact de la corrosion \u00e9lectrique caus\u00e9e par la haute tension sur les roulements deviendra \u00e9galement plus important.<\/p>\n\n\n\n

En outre, pour contr\u00f4ler le moteur plus efficacement, la fr\u00e9quence de contr\u00f4le de l'onduleur est \u00e9galement en constante augmentation. Il est pr\u00e9visible que le nombre d'\u00e9tincelles augmente, ce qui accro\u00eet la probabilit\u00e9 de corrosion \u00e9lectrique.<\/p>\n\n\n\n

Pour prolonger la dur\u00e9e de vie de la batterie du v\u00e9hicule et \u00e9conomiser l'\u00e9nergie \u00e9lectrique, l'essieu \u00e9lectrique continue \u00e0 se d\u00e9velopper dans le sens de la petite taille et de la l\u00e9g\u00e8ret\u00e9. Bien qu'il soit petit et l\u00e9ger, pour r\u00e9pondre aux exigences de conduite, le moteur doit continuer \u00e0 avoir un couple et une puissance \u00e9lev\u00e9s, et les roulements doivent donc \u00eatre \u00e0 grande vitesse.<\/p>\n\n\n\n

D'autre part, au fur et \u00e0 mesure que l'e-Axle s'all\u00e8ge, les roulements et les bo\u00eetes de roulement deviennent de plus en plus minces. Sous l'effet suppl\u00e9mentaire de la charge, la bague ext\u00e9rieure du roulement a tendance \u00e0 glisser. Le glissement de la bague ext\u00e9rieure entra\u00eene l'usure du roulement, qui \u00e0 son tour provoque l'excentricit\u00e9 et l'inclinaison du roulement, ce qui se traduit par des bruits et des vibrations anormaux de la bo\u00eete, et la poudre de broyage g\u00e9n\u00e9r\u00e9e r\u00e9duit la dur\u00e9e de vie du roulement.<\/p>\n\n\n\n

 <\/p>","protected":false},"excerpt":{"rendered":"

NTN Co., Ltd. (hereinafter referred to as NTN) has developed “insulating coated bearings” that are resistant to electrical corrosion for the three-electric system (e-Axle) […]<\/p>\n","protected":false},"author":4,"featured_media":9637,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9634","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bearing-basic"],"uagb_featured_image_src":{"full":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",400,250,false],"thumbnail":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",150,94,false],"medium":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",300,188,false],"medium_large":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",400,250,false],"large":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",400,250,false],"1536x1536":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",400,250,false],"2048x2048":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",400,250,false],"trp-custom-language-flag":["https:\/\/www.zmsbearing.com\/wp-content\/uploads\/2023\/12\/insulating-coated-bearings-1.jpg",18,12,false]},"uagb_author_info":{"display_name":"Emily lee","author_link":"https:\/\/www.zmsbearing.com\/fr\/author\/zms-bearings\/"},"uagb_comment_info":0,"uagb_excerpt":"NTN Co., Ltd. (hereinafter referred to as NTN) has developed “insulating coated bearings” that are resistant to electrical corrosion for the three-electric system (e-Axle) […]","_links":{"self":[{"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/posts\/9634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/comments?post=9634"}],"version-history":[{"count":0,"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/posts\/9634\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/media\/9637"}],"wp:attachment":[{"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/media?parent=9634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/categories?post=9634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zmsbearing.com\/fr\/wp-json\/wp\/v2\/tags?post=9634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}