{"id":65292,"date":"2024-07-10T12:03:06","date_gmt":"2024-07-10T10:03:06","guid":{"rendered":"https:\/\/grupoalava.rearmachine.com\/analise-de-maquinas-alternativas\/"},"modified":"2024-07-10T12:03:06","modified_gmt":"2024-07-10T10:03:06","slug":"analise-de-maquinas-alternativas","status":"publish","type":"post","link":"https:\/\/grupoalava.rearmachine.com\/pt\/preditec\/analise-de-maquinas-alternativas\/","title":{"rendered":"An\u00e1lise de m\u00e1quinas alternativas"},"content":{"rendered":"<p>Os motores e compressores alternativos podem ser diagnosticados com grande precis\u00e3o a partir do sinal din\u00e2mico da press\u00e3o, dos ultrassons e das vibra\u00e7\u00f5es.<\/p>\n<p>Nos compressores de pist\u00e3o e nos motores de combust\u00e3o interna, a an\u00e1lise de vibra\u00e7\u00f5es atrav\u00e9s da FFT n\u00e3o \u00e9 uma t\u00e9cnica eficaz, uma vez que o espectro de vibra\u00e7\u00e3o apresenta muitos picos e \u00e9 imposs\u00edvel distinguir os diferentes problemas mec\u00e2nicos que a\u00ed se verificam.<\/p>\n<p>A an\u00e1lise das curvas de press\u00e3o do cilindro \u00e9 a t\u00e9cnica fundamental no diagn\u00f3stico preditivo deste tipo de m\u00e1quinas. A press\u00e3o do cilindro pode ser representada como uma curva fechada em fun\u00e7\u00e3o do volume varrido pelo pist\u00e3o (P-V) ou como uma curva aberta em fun\u00e7\u00e3o do \u00e2ngulo do virabrequim (P-a). <\/p>\n<p>A curva P-V serve para calcular a pot\u00eancia (IHP) e fazer uma an\u00e1lise da efici\u00eancia (desempenho) da m\u00e1quina, como t\u00e9cnica de avalia\u00e7\u00e3o do estado operacional atrav\u00e9s da compara\u00e7\u00e3o com os par\u00e2metros nominais ou de projeto.<\/p>\n<p>A curva aberta P-a \u00e9 utilizada para a an\u00e1lise multicanal das formas de onda, atrav\u00e9s da sobreposi\u00e7\u00e3o de vari\u00e1veis t\u00edpicas do estado mec\u00e2nico (vibra\u00e7\u00e3o e ultrassons) sobre a curva de press\u00e3o do cilindro.<\/p>\n<p>Os gr\u00e1ficos de diagn\u00f3stico t\u00edpicos para m\u00e1quinas alternativas s\u00e3o:<\/p>\n<ul>\n<li>Gr\u00e1fico da press\u00e3o em fun\u00e7\u00e3o do volume do cilindro (P-V).<\/li>\n<li>Gr\u00e1fico da press\u00e3o em fun\u00e7\u00e3o do \u00e2ngulo do virabrequim (P-a).<\/li>\n<li>Gr\u00e1fico sobreposto das vibra\u00e7\u00f5es BF (0-200 Hz) sobre a curva (P-a).<\/li>\n<li>Gr\u00e1fico sobreposto das vibra\u00e7\u00f5es AF (1-20 kHz) sobre a curva (P-a).<\/li>\n<li>Gr\u00e1fico de ultrassons (40-60 kHz) sobreposto \u00e0 curva (P-a).<\/li>\n<li>Monitor de cinem\u00e1tica angular de RPM (an\u00e1lise de vibra\u00e7\u00f5es torcionais).<\/li>\n<li>Gr\u00e1fico FFT da press\u00e3o (an\u00e1lise de pulsa\u00e7\u00e3o).<\/li>\n<li>Gr\u00e1fico da igni\u00e7\u00e3o secund\u00e1ria e prim\u00e1ria (em M.E.P.).<\/li>\n<\/ul>\n<h5>Produtos relacionados<\/h5>\n<p><a title=\"\" href=\"https:\/\/www.preditec.com\/productos\/monitorizacion-de-compresores-alternativos\/sistema-de-monitorizacion-avanzada-de-compresores-alternativos-prognost\/\">Sistema avan\u00e7ado de monitoriza\u00e7\u00e3o de compressores alternativos Prognost<\/a><\/p>\n<p>Entra em contacto com um dos nossos engenheiros especializados em manuten\u00e7\u00e3o preditiva para que te aconselhe sobre como aplicar a manuten\u00e7\u00e3o preditiva atrav\u00e9s da an\u00e1lise de m\u00e1quinas alternativas: <a href=\"https:\/\/www.preditec.com\/mantenimiento-predictivo\/maquinas-alternativas\/#\">info@preditec.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Os motores e compressores alternativos podem ser diagnosticados com grande  [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":65293,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8508,8516,8576],"tags":[8550],"class_list":["post-65292","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-preditec","category-conhecimento","category-analise-de-maquinas-alternativas","tag-artigos-especializados"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - 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