{"id":8633,"date":"2021-06-15T10:27:57","date_gmt":"2021-06-15T08:27:57","guid":{"rendered":"https:\/\/dienerprecisionpumps.com\/?p=8633"},"modified":"2022-12-12T10:49:07","modified_gmt":"2022-12-12T09:49:07","slug":"fluides-abrasifs-fins-dans-les-pompes-volumetriques","status":"publish","type":"post","link":"https:\/\/dienerprecisionpumps.com\/fr\/fluides-abrasifs-fins-dans-les-pompes-volumetriques\/","title":{"rendered":"Fluides abrasifs fins dans les pompes volum\u00e9triques"},"content":{"rendered":"<h3><strong>Qu&rsquo;est-ce qu&rsquo;un fluide abrasif fin ?<\/strong><\/h3>\n<p>Un fluide abrasif est un fluide qui provoque une usure accrue du syst\u00e8me fluidique en \u00e9rodant les surfaces par interaction physique.&nbsp;L&rsquo;\u00e9rosion peut se produire \u00e0 partir d&rsquo;un simple \u00e9coulement sur une surface ou par les particules abrasives interf\u00e9rant avec les interactions des composants internes dans une pompe.<\/p>\n<p>Les eaux us\u00e9es peuvent \u00eatre de gros contaminants, contenant des pigments int\u00e9gr\u00e9s au liquide.<\/p>\n<p>Ceux-ci comprennent les pigments de peinture, les pigments d&rsquo;encre, le carbone en suspension, les pigments m\u00e9talliques et le chocolat (en suspension dans du lait, du sirop, etc.).&nbsp;Cet article traitera sp\u00e9cifiquement des particules abrasives en suspension de taille inf\u00e9rieure \u00e0 1 mm.<\/p>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dienerprecisionpumps.com\/wp-content\/uploads\/2021\/07\/Gear-tip-abrasive-wear.png\" alt=\"Usure abrasive de la pointe de l'engrenage\" class=\"wp-image-8635\" width=\"750\" height=\"437\" srcset=\"https:\/\/dienerprecisionpumps.com\/wp-content\/uploads\/2021\/07\/Gear-tip-abrasive-wear.png 527w, https:\/\/dienerprecisionpumps.com\/wp-content\/uploads\/2021\/07\/Gear-tip-abrasive-wear-300x175.png 300w, https:\/\/dienerprecisionpumps.com\/wp-content\/uploads\/2021\/07\/Gear-tip-abrasive-wear-400x234.png 400w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><figcaption>Usure abrasive de la pointe de l&rsquo;engrenage<br><br><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>Particules communes causant une abrasion<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Naturellement, plus la particule solide est dure, plus elle est pr\u00e9occupante pour l&rsquo;usure de la pompe.&nbsp;Les pigments durs tels que le dioxyde de titane (TiO&nbsp;<sub>2<\/sub>&nbsp;) (duret\u00e9 de 6 sur l&rsquo;\u00e9chelle de Mohr) peuvent rapidement user les composants m\u00e9talliques non durcis en interaction.&nbsp;Cependant, m\u00eame les pigments mous peuvent user des composants non m\u00e9talliques tels que des engrenages en plastique ou des clapets anti-retour en caoutchouc.&nbsp;Si possible, tous les composants mobiles doivent \u00eatre plus durs que les particules pomp\u00e9es.&nbsp;Cependant, la s\u00e9lection des mat\u00e9riaux les plus durs \u00e0 un co\u00fbt qui peut ne pas \u00eatre n\u00e9cessaire.&nbsp;Par cons\u00e9quent, il est important d\u2019avoir une bonne connaissance du fluide et de communiquer ces informations aux ing\u00e9nieurs en charge de la conception des pompes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La taille des particules affectera \u00e9galement le choix de pompe.&nbsp;Les pompes con\u00e7ues avec des mat\u00e9riaux ultra-durs tels que l&rsquo;alumine (Al<sub>2<\/sub>&nbsp;O<sub>3<\/sub>) peuvent se lier si la taille du pigment est sup\u00e9rieure \u00e0 l&rsquo;espace libre dans la pompe.&nbsp;Les pompes utilisant des composants souples tels que le plastique ou le caoutchouc peuvent \u00eatre plus tol\u00e9rantes aux grosses particules mais resteront sensibles \u00e0 l&rsquo;usure abrasive.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Effet de la viscosit\u00e9<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La viscosit\u00e9 du liquide affecte l&rsquo;abrasivit\u00e9 de la combinaison liquide\/pigment.&nbsp;Les fluides \u00e0 viscosit\u00e9 plus \u00e9lev\u00e9e d\u00e9veloppent un film fluide plus robuste qui amortit les pigments.&nbsp;Cela est particuli\u00e8rement vrai dans les configurations telles que les paliers hydrodynamiques .&nbsp;La viscosit\u00e9 joue un effet moindre lorsqu&rsquo;un contact intentionnel entre les composants est requis, comme l&rsquo;interaction des dents d&rsquo;engrenage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Conditions de fonctionnement<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Des \u00e9tudes ont montr\u00e9 que l&rsquo;usure par abrasion est li\u00e9e au carr\u00e9 de la vitesse.&nbsp;Pour cette raison, de nombreux fournisseurs de pompes sugg\u00e8rent de surdimensionner la pompe et de la faire fonctionner \u00e0 une vitesse plus lente.&nbsp;Ce n&rsquo;est pas id\u00e9al pour les paliers hydrodynamiques et&nbsp;les fuites internes&nbsp;.&nbsp;Cependant, l&rsquo;usure par abrasion est g\u00e9n\u00e9ralement la principale pr\u00e9occupation et les autres effets peuvent \u00eatre surmont\u00e9s.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Type de pompe<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Le type de pompe s\u00e9lectionn\u00e9 est extr\u00eamement important pour les fluides abrasifs.&nbsp;Les pompes volum\u00e9triques rotatives ont g\u00e9n\u00e9ralement un contact composant-composant.&nbsp;L&rsquo;utilisation de ces pompes pour liquides abrasifs n\u00e9cessite des mat\u00e9riaux durs tels que :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>C\u00e9ramique (Alumine ou Zircone)<\/li><li>Carbures (carbure de tungst\u00e8ne)<\/li><li>Aciers tremp\u00e9s<\/li><li>Rev\u00eatements durs<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Chaque mat\u00e9riau a des compromis tels que la fabrication, le co\u00fbt, la corrosivit\u00e9, etc. Le style de la pompe affecte \u00e9galement les mat\u00e9riaux disponibles.&nbsp;Les <a href=\"https:\/\/dienerprecisionpumps.com\/fr\/pompes-engrenage-precision\/\">pompes \u00e0 engrenages<\/a>&nbsp;externe, par exemple, ne peuvent pas utiliser d&rsquo;engrenages en c\u00e9ramique car les angles vifs subiront une rupture fragile.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les pompes utilisant des \u00e9lastom\u00e8res dans le trajet d&rsquo;\u00e9coulement, telles que les pompes \u00e0 membrane, n&rsquo;ont souvent pas de contact composant-composant.&nbsp;Cependant, l&rsquo;\u00e9lastom\u00e8re mou est soumis \u00e0 l&rsquo;\u00e9rosion simplement par le mat\u00e9riau abrasif s&rsquo;\u00e9coulant autour des bords \u00e0 grande vitesse.&nbsp;De plus, le caract\u00e8re puls\u00e9 de certaines pompes est incompatible avec certaines applications telles que le jet d&rsquo;encre continu sans inclure des amortisseurs d&rsquo;impulsions co\u00fbteux.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Etanch\u00e9it\u00e9<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les abrasifs fins sont catastrophiques pour les joints coulissants.&nbsp;Les joints coulissants, de par leur nature, sont r\u00e9alis\u00e9s dans des mat\u00e9riaux souples coulissants sur des mat\u00e9riaux durs.&nbsp;De petites particules abrasives se glissent facilement entre les surfaces de glissement et usent rapidement le mat\u00e9riau du joint souple.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une solution consiste \u00e0 utiliser un couplage magn\u00e9tique tel que celui que l&rsquo;on trouve dans&nbsp;les pompes \u00e0 engrenages coupl\u00e9es magn\u00e9tiquement.&nbsp;C&rsquo;est une excellente solution pour les liquides abrasifs \u00e0 condition que la taille des particules soit petite et que les particules ne soient pas magn\u00e9tiques.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu&rsquo;est-ce qu&rsquo;un fluide abrasif fin ? Un fluide abrasif est un fluide qui provoque une usure accrue du syst\u00e8me fluidique en \u00e9rodant les surfaces par interaction physique.&nbsp;L&rsquo;\u00e9rosion peut se produire \u00e0 partir d&rsquo;un simple \u00e9coulement sur une surface ou par les particules abrasives interf\u00e9rant avec les interactions des composants internes dans une pompe. Les eaux [&hellip;]<\/p>\n","protected":false},"author":21,"featured_media":8575,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15,20],"tags":[],"class_list":["post-8633","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee","category-pompes-a-engrenages"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fluides abrasifs, pompes volum\u00e9triques | Diener Precision Pumps<\/title>\n<meta name=\"description\" content=\"Un fluide abrasif fin provoque une usure du syst\u00e8me fluidique en \u00e9rodant les surfaces par interaction physique. 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