{"id":53265,"date":"2025-01-27T13:06:15","date_gmt":"2025-01-27T12:06:15","guid":{"rendered":"https:\/\/grupoalava.rearmachine.com\/preditec\/servicios\/manutencao-preditiva\/compressores-alternativos\/"},"modified":"2026-06-08T16:15:51","modified_gmt":"2026-06-08T14:15:51","slug":"compressores-alternativos","status":"publish","type":"servicios-preditec","link":"https:\/\/grupoalava.rearmachine.com\/pt\/preditec\/servicios\/manutencao-preditiva\/compressores-alternativos\/","title":{"rendered":"Compressores alternativos"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-background-color:#f8fafd;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-stretch fusion-flex-content-wrap\" style=\"max-width:calc( 1250px + 30px );margin-left: calc(-30px \/ 2 );margin-right: calc(-30px \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-padding-right:17px;--awb-padding-left:20px;--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:0px;--awb-margin-bottom-large:20px;--awb-spacing-left-large:0px;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:0px;--awb-spacing-left-medium:0px;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:15px;--awb-spacing-left-small:15px;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;--awb-font-size:28px;\"><h2 class=\"fusion-title-heading title-heading-left fusion-responsive-typography-calculated\" style=\"font-family:&quot;Roboto&quot;;font-style:normal;font-weight:300;margin:0;font-size:1em;--fontSize:28;line-height:1.14;\">Servi\u00e7o integral de medi\u00e7\u00f5es e diagn\u00f3sticos preditivos em compressores alternativos &#8211; PRE-7018<\/h2><\/div><div class=\"fusion-text fusion-text-1\"><p>O servi\u00e7o de manuten\u00e7\u00e3o preditiva para monitorizar a an\u00e1lise funcional e mec\u00e2nica de compressores alternativos baseia-se no processamento multicanal de sinais de press\u00e3o no cilindro, vibra\u00e7\u00f5es de alta e baixa frequ\u00eancia, ultra-sons e temperatura.<\/p>\n<p>A sincroniza\u00e7\u00e3o da medi\u00e7\u00e3o \u00e9 efectuada com um codificador ou tac\u00f3metro, que serve de refer\u00eancia \u00e0 posi\u00e7\u00e3o do pist\u00e3o, em cilindros de simples e duplo efeito, e em compressores de v\u00e1rias fases, acionados por motor el\u00e9trico ou motor de combust\u00e3o interna.<\/p>\n<p>A partir da curva P-V fechada, s\u00e3o calculadas a pot\u00eancia indicada ou termodin\u00e2mica (IHP), a capacidade e as efici\u00eancias volum\u00e9tricas na aspira\u00e7\u00e3o e na descarga, e podem ser avaliadas as perdas de press\u00e3o nas v\u00e1lvulas.<\/p>\n<p>A partir da curva de press\u00e3o aberta, \u00e9 poss\u00edvel detetar a correla\u00e7\u00e3o com as outras vari\u00e1veis mec\u00e2nicas:<\/p>\n<ul>\n<li>Folgas nos elementos da cruzeta (pino e corredi\u00e7as)<\/li>\n<li>Fugas de g\u00e1s nas v\u00e1lvulas e nos an\u00e9is do pist\u00e3o<\/li>\n<li>Pulsa\u00e7\u00e3o de press\u00e3o<\/li>\n<li>Perdas de carga excessivas na passagem das condutas<\/li>\n<li>Desgaste da camisa do cilindro<\/li>\n<li>Invers\u00e3o insuficiente do stress do caule<\/li>\n<li>Sobrecarga por fadiga da haste<\/li>\n<li>Disfun\u00e7\u00e3o dos para-raios<\/li>\n<\/ul>\n<p>O diagn\u00f3stico do estado funcional e mec\u00e2nico de um compressor alternativo baseia-se na an\u00e1lise da curva de press\u00e3o no cilindro (P-V ), de acordo com o seguinte procedimento:<\/p>\n<ul>\n<li>Medi\u00e7\u00e3o da press\u00e3o do cilindro, sincronizada com a posi\u00e7\u00e3o da cambota atrav\u00e9s de um codificador ou de um tac\u00f3metro de refer\u00eancia em ponto morto.<\/li>\n<li>Medi\u00e7\u00e3o de vari\u00e1veis mec\u00e2nicas sincronizadas no padr\u00e3o de press\u00e3o (vibra\u00e7\u00e3o, ultra-sons, temperatura).<\/li>\n<li>C\u00e1lculo experimental da pot\u00eancia indicada (IHP) com avalia\u00e7\u00e3o das efici\u00eancias volum\u00e9tricas, do equil\u00edbrio do caudal e da capacidade do compressor, e an\u00e1lise das tens\u00f5es na biela atrav\u00e9s da composi\u00e7\u00e3o da carga est\u00e1tica experimental (press\u00e3o) e da carga din\u00e2mica te\u00f3rica (in\u00e9rcia do trem alternativo).<\/li>\n<li>Identifica\u00e7\u00e3o da v\u00e1lvula, da passagem do g\u00e1s (pulsa\u00e7\u00f5es e restri\u00e7\u00f5es) e dos problemas mec\u00e2nicos (impactos, fric\u00e7\u00e3o e folgas) do trem alternativo e dos suportes da placa de base.<\/li>\n<li>Relat\u00f3rio do estado funcional e mec\u00e2nico com recomenda\u00e7\u00f5es paliativas, consulta a Preditec para mais informa\u00e7\u00f5es.<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A Preditec oferece servi\u00e7os de manuten\u00e7\u00e3o preditiva para compressores alternativos utilizando equipamento port\u00e1til e sistemas de medi\u00e7\u00e3o cont\u00ednua.<\/p>\n","protected":false},"featured_media":53266,"parent":53026,"menu_order":0,"template":"","categoria-servicio-precitec":[7623,7635,7636],"class_list":["post-53265","servicios-preditec","type-servicios-preditec","status-publish","has-post-thumbnail","hentry","categoria-servicio-precitec-ficha-de-servico","categoria-servicio-precitec-manutencao-preditiva","categoria-servicio-precitec-destaca-a-manutencao-preditiva"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Compressores alternativos - Grupo \u00c1lava<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Compressores alternativos - Grupo \u00c1lava\" \/>\n<meta property=\"og:description\" content=\"A 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