{"id":20171,"date":"2020-11-25T06:09:34","date_gmt":"2020-11-25T06:09:34","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=20171"},"modified":"2020-11-25T06:09:45","modified_gmt":"2020-11-25T06:09:45","slug":"peering-the-world-of-bearings-from-the-perspective-of-numbers","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/fr\/scruter-le-monde-des-roulements-du-point-de-vue-des-chiffres\/","title":{"rendered":"Examiner le monde des roulements du point de vue des chiffres"},"content":{"rendered":"
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Les tailles vont de 2 mm \u00e0 6 m<\/strong><\/strong><\/h2>\n\n\n\n

Bearings vary in size from small to large. The smallest “miniature bearing” in the world is 0.6 mm in inner diameter, 2.0 mm in outer diameter and 0.8 mm in thickness. Large bearings, with an outer diameter of 6 meters and a weight of more than 15 tons, are used in large shield machines for tunneling. This type of shield machine was used in the excavation of a cross sea tunnel under the Dover Strait, which connects Britain and France, and this large bearing was used.<\/strong><\/strong><\/p>\n\n\n\n

400000 tr\/min<\/strong><\/strong><\/h2>\n\n\n\n

Dental drill (commonly known as dental handpiece) is equipped with a bearing that can rotate at a super high speed. These are two ultra precision bearings with inner diameter of 3.0 mm \u00d7 outer diameter of 6.0 mm \u00d7 width of 2 mm and steel ball diameter of 1.0 mm. They can rotate at an amazing speed of “400000 revolutions per minute”, which greatly reduces the vibration of dental handpieces and greatly reduces the pain of patients during treatment.<\/strong><\/strong><\/p>\n\n\n\n

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La vitesse de la bille d'acier est de 160 m\u00e8tres par seconde<\/strong><\/strong><\/h2>\n\n\n\n

Le palier d'arbre principal utilis\u00e9 dans le moteur \u00e0 r\u00e9action V2500 d'un avion de ligne international a une vitesse de roulement de 160 m\u00e8tres par seconde, soit 580 kilom\u00e8tres par heure. C'est gr\u00e2ce \u00e0 l'utilisation de roulements hautes performances et \u00e0 grande vitesse que le moteur peut fonctionner en toute s\u00e9curit\u00e9 pendant longtemps et transporter des passagers en toute s\u00e9curit\u00e9 dans toutes les r\u00e9gions du monde.<\/strong><\/strong><\/p>\n\n\n\n

Amplitude inf\u00e9rieure \u00e0 100 nm<\/strong><\/strong><\/h2>\n\n\n\n

It is no exaggeration that “the accuracy of the machine depends on the rotation accuracy of the bearing”. The two ends of the rotating shaft are supported by two bearings. If the shaking of the axis is large, the mechanical performance cannot be improved. Wechat of metal processing has good content and deserves attention. The “hard disk”, a computer external storage device with ultra precision bearings, has an axial amplitude of less than 100 nm (1 nm = 1 \/ 1000000 mm). The key to achieve such ultra-high precision is the accuracy of rolling elements such as “steel ball” and “roller”.<\/strong><\/strong><\/p>\n\n\n\n

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Travailler dans l'espace pendant 15 ans<\/strong><\/strong><\/h2>\n\n\n\n

Le d\u00e9veloppement de l'univers est indissociable des rep\u00e8res. Les pr\u00e9visions m\u00e9t\u00e9orologiques, les signaux de radio et de t\u00e9l\u00e9vision par satellite, les informations de positionnement par satellite des automobiles, etc., sont fournis par des satellites volant autour de la terre. Le satellite est \u00e9quip\u00e9 d'un gyroscope pour maintenir l'attitude et le cap du satellite, et le gyroscope est \u00e9quip\u00e9 de rel\u00e8vements ultra pr\u00e9cis. Ce type de roulement peut fonctionner en continu dans l'espace pendant 15 ans.<\/strong><\/strong><\/p>\n\n\n\n

Un monde de 253 degr\u00e9s au-dessous de z\u00e9ro \u00e0 500 degr\u00e9s au-dessus de z\u00e9ro<\/strong><\/strong><\/h2>\n\n\n\n

Les roulements de la pompe \u00e0 carburant liquide de la fus\u00e9e spatiale sont les roulements \u00e0 la temp\u00e9rature la plus basse. Le roulement fonctionne dans l'hydrog\u00e8ne liquide \u00e0 moins 253 \u2103. Le roulement sp\u00e9cial haute performance utilis\u00e9 dans les scanners CT m\u00e9dicaux est le repr\u00e9sentant typique du roulement utilis\u00e9 dans un environnement \u00e0 haute temp\u00e9rature. Dans les tubes \u00e0 vide \u00e0 rayons X avec des temp\u00e9ratures allant jusqu'\u00e0 300 \u00e0 500 \u2103, les roulements peuvent \u00e9galement fonctionner en continu pour prot\u00e9ger notre sant\u00e9.<\/strong><\/strong><\/p>\n\n\n\n

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

Sizes range from 2 mm to 6 m Bearings vary in size from small to large. The smallest “miniature bearing” in the world is 0.6 mm in inner diameter, 2.0 mm in outer diameter and 0.8 mm in thickness. Large bearings, with an outer diameter of 6 meters and a weight of more than 15…<\/p>","protected":false},"author":2,"featured_media":20174,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2020\/11\/\u56fe\u72476.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/posts\/20171"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/comments?post=20171"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/posts\/20171\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/media\/20174"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/media?parent=20171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/categories?post=20171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/fr\/wp-json\/wp\/v2\/tags?post=20171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}