{"id":20618,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/air-gap\/"},"modified":"2026-07-03T09:54:53","modified_gmt":"2026-07-03T09:54:53","slug":"air-gap","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/pt\/glossary\/air-gap\/","title":{"rendered":"O que \u00e9 a folga de ar em motores el\u00e9tricos? Folga cr\u00edtica"},"content":{"rendered":"<h1>Compreender o entreferro em motores el\u00e9tricos<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-1\/\" title=\"Equilibrador port\u00e1til e analisador de vibra\u00e7\u00f5es Balanset-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A kit completo de balanceador port\u00e1til e analisador de vibra\u00e7\u00f5es\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/devices\/\" rel=\"tag\">Dispositivos<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-1\/\" title=\"Equilibrador port\u00e1til e analisador de vibra\u00e7\u00f5es Balanset-1A\">Equilibrador port\u00e1til e analisador de vibra\u00e7\u00f5es Balanset-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,975.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"Adiciona ao carrinho: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/vibration-sensor\/\" title=\"Sensor de vibra\u00e7\u00e3o\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Grande plano do sensor de vibra\u00e7\u00e3o Balanset-1A\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/vibration-sensor\/\" title=\"Sensor de vibra\u00e7\u00e3o\">Sensor de vibra\u00e7\u00e3o<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>90.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"Adiciona ao carrinho: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Sensor \u00f3tico (tac\u00f3metro laser)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Sensor \u00f3tico (tac\u00f3metro laser)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Sensor \u00f3tico (tac\u00f3metro laser)\">Sensor \u00f3tico (tac\u00f3metro laser)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>124.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"Adiciona ao carrinho: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-4\/\" title=\"Balanset-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Kit de balanceamento de rotor Vibromera: estojo de transporte, condicionador de sinal multicanal, analisador port\u00e1til, base magn\u00e9tica, sensores de vibra\u00e7\u00e3o e cabos espiralados.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/devices\/\" rel=\"tag\">Dispositivos<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-4\/\" title=\"Balanset-4\">Balanset-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>6,803.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"Adiciona ao carrinho: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/magnet-stand\/\" title=\"Suporte magn\u00e9tico Insize-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Base magn\u00e9tica.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/magnet-stand\/\" title=\"Suporte magn\u00e9tico Insize-60-kgf\">Suporte magn\u00e9tico Insize-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>46.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"Adiciona ao carrinho: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/reflective-tape\/\" title=\"Fita refletora\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Fita refletora\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/reflective-tape\/\" title=\"Fita refletora\">Fita refletora<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>10.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=2329\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2329\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2329\" data-product_sku=\"rt-1\" aria-label=\"Adiciona ao carrinho: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2329\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/dynamic-balancer-balanset-1a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/dynamic-balancer-balanset-1a\/\" title=\"Balanceador din\u00e2mico &quot;Balanset-1A&quot; OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Conte\u00fado do kit Balanset-1A com unidade de interface, sensores, tac\u00f3metro e acess\u00f3rios\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1024x683.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1536x1024.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-2048x1366.webp 2048w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-e1732998877834.webp 708w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/devices\/\" rel=\"tag\">Dispositivos<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/dynamic-balancer-balanset-1a\/\" title=\"Balanceador din\u00e2mico &quot;Balanset-1A&quot; OEM\">Balanceador din\u00e2mico \"Balanset-1A\" OEM<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,735.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=4193\" data-quantity=\"1\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/20618?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"Adiciona ao carrinho: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p>O <strong>entreferro<\/strong> \u00e9 a folga radial estreita entre a superf\u00edcie exterior do rotor e o furo interior do estator num motor ou gerador el\u00e9trico. Normalmente, apenas <strong>0,3-2,0 mm<\/strong> (0,012-0,080 in) de largura, este fino espa\u00e7o anular \u00e9 a ponte magn\u00e9tica atrav\u00e9s da qual a energia electromagn\u00e9tica passa entre os enrolamentos estacion\u00e1rios e o elemento rotativo. Apesar do seu tamanho modesto, o espa\u00e7o de ar \u00e9 uma das dimens\u00f5es mais decisivas na conce\u00e7\u00e3o de uma m\u00e1quina: rege a efici\u00eancia, o fator de pot\u00eancia, o bin\u00e1rio de arranque e - com interesse direto para o engenheiro de fiabilidade - a suscetibilidade da m\u00e1quina a <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/magnetic-pull\/\">for\u00e7a magn\u00e9tica desequilibrada<\/a> e a resultante <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/vibration\/\">vibra\u00e7\u00e3o<\/a>.<\/p>\n<h2>1. Defini\u00e7\u00e3o: O que \u00e9 o Entreferro?<\/h2>\n<p>O entreferro \u00e9 a folga que separa o ferro do rotor do ferro do estator, de modo a que o rotor possa rodar livremente, permitindo ao mesmo tempo que o fluxo magn\u00e9tico passe de um para o outro. Funcionalmente, \u00e9 o elemento de maior relut\u00e2ncia em todo o circuito magn\u00e9tico - o ar \u00e9 cerca de mil vezes menos perme\u00e1vel do que o a\u00e7o el\u00e9trico - pelo que a sua largura e uniformidade dominam o comportamento do campo magn\u00e9tico. Duas propriedades s\u00e3o importantes independentemente: a <em>magnitude<\/em> da lacuna (qual a sua largura) e a sua <em>uniformidade<\/em> (se \u00e9 igual a toda a volta do furo).<\/p>\n<p>Ambos t\u00eam consequ\u00eancias profundas. Uma abertura n\u00e3o uniforme produz for\u00e7as magn\u00e9ticas radiais desequilibradas que provocam vibra\u00e7\u00f5es e aceleram <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/bearing-wear\/\">desgaste dos rolamentos<\/a>, enquanto que uma folga excessivamente grande diminui silenciosamente a efici\u00eancia e aumenta a corrente de magnetiza\u00e7\u00e3o que o motor consome para estabelecer o seu fluxo. A arte do design do motor \u00e9 escolher a menor folga que a mec\u00e2nica tolera com seguran\u00e7a.<\/p>\n<h2>2. Dimens\u00f5es t\u00edpicas do entreferro<\/h2>\n<p>A diferen\u00e7a absoluta aumenta com o tamanho da m\u00e1quina, mas como <em>fra\u00e7\u00e3o<\/em> de di\u00e2metro do furo encolhe - as m\u00e1quinas de grande dimens\u00e3o t\u00eam folgas proporcionalmente mais apertadas porque os seus rotores s\u00e3o mais r\u00edgidos em rela\u00e7\u00e3o ao seu di\u00e2metro.<\/p>\n<h3>Por tamanho do motor<\/h3>\n<ul>\n<li><strong>Motores pequenos (&lt; 10 CV):<\/strong> 0,3-0,6 mm (0,012-0,024 in).<\/li>\n<li><strong>Motores m\u00e9dios (10-200 CV):<\/strong> 0,5-1,2 mm (0,020-0,047 in).<\/li>\n<li><strong>Grandes motores (200-1000 CV):<\/strong> 1,0-2,0 mm (0,040-0,080 in).<\/li>\n<li><strong>Motores muito grandes (&gt; 1000 CV):<\/strong> 1,5-3,0 mm (0,060-0,120 in).<\/li>\n<li><strong>Tend\u00eancia geral:<\/strong> as m\u00e1quinas maiores t\u00eam folgas absolutas maiores, mas uma folga menor em percentagem do di\u00e2metro.<\/li>\n<\/ul>\n<h3>Por tipo de motor<\/h3>\n<ul>\n<li><strong>Motores de indu\u00e7\u00e3o:<\/strong> folgas maiores, normalmente 0,5\u20132,0 mm.<\/li>\n<li><strong>Motores s\u00edncronos:<\/strong> muito semelhantes \u00e0s m\u00e1quinas de indu\u00e7\u00e3o.<\/li>\n<li><strong>Motores de corrente cont\u00ednua:<\/strong> folgas de armadura muito pequenas, 0,3\u20131,0 mm.<\/li>\n<li><strong>Projetos de alta efici\u00eancia:<\/strong> tendem para o extremo mais pequeno da sua classe para um melhor desempenho.<\/li>\n<\/ul>\n<h2>3. Porque \u00e9 que o entreferro \u00e9 importante<\/h2>\n<h3>Desempenho eletromagn\u00e9tico<\/h3>\n<ul>\n<li><strong>Relut\u00e2ncia do circuito magn\u00e9tico:<\/strong> o entreferro \u00e9 a relut\u00e2ncia dominante no trajeto do fluxo; tudo o resto (o a\u00e7o) \u00e9 comparativamente transparente.<\/li>\n<li><strong>Corrente de magnetiza\u00e7\u00e3o:<\/strong> uma folga menor necessita de menos corrente de magnetiza\u00e7\u00e3o para estabelecer o mesmo fluxo, o que aumenta o fator de pot\u00eancia.<\/li>\n<li><strong>Efici\u00eancia:<\/strong> as folgas mais pequenas s\u00e3o geralmente mais eficientes porque reduzem as perdas de magnetiza\u00e7\u00e3o.<\/li>\n<li><strong>Produ\u00e7\u00e3o de bin\u00e1rio:<\/strong> uma folga mais apertada proporciona um acoplamento magn\u00e9tico mais forte e, por conseguinte, um melhor bin\u00e1rio, incluindo o bin\u00e1rio de arranque.<\/li>\n<\/ul>\n<h3>Considera\u00e7\u00f5es mec\u00e2nicas<\/h3>\n<ul>\n<li><strong>Folga:<\/strong> a folga deve absorver a deflex\u00e3o do veio, as toler\u00e2ncias dos rolamentos e o crescimento t\u00e9rmico sem que o rotor toque no estator.<\/li>\n<li><strong>Margem de seguran\u00e7a:<\/strong> evita o contacto rotor-estator durante transientes de vibra\u00e7\u00e3o ou condi\u00e7\u00f5es de funcionamento invulgares.<\/li>\n<li><strong>Capacidade de fabrico:<\/strong> a folga escolhida deve poder ser obtida de forma repet\u00edvel dentro das toler\u00e2ncias normais de produ\u00e7\u00e3o.<\/li>\n<\/ul>\n<p>Estas duas press\u00f5es puxam em direc\u00e7\u00f5es opostas, raz\u00e3o pela qual a folga de ar \u00e9 fundamentalmente um compromisso e n\u00e3o um valor a minimizar cegamente. A realidade mec\u00e2nica de <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/eccentricity\/\">excentricidade<\/a> em servi\u00e7o significa que um projetista que opte por uma folga demasiado apertada troca simplesmente a efici\u00eancia pelo risco de uma fric\u00e7\u00e3o destrutiva.<\/p>\n<h2>4. Excentricidade do entreferro<\/h2>\n<p>A excentricidade do entreferro \u00e9 a n\u00e3o uniformidade da folga em torno da circunfer\u00eancia \u2014 o defeito mais importante do entreferro para o analista de vibra\u00e7\u00f5es.<\/p>\n<ul>\n<li><strong>Folga uniforme:<\/strong> a mesma dimens\u00e3o em todas as posi\u00e7\u00f5es angulares.<\/li>\n<li><strong>Folga exc\u00eantrica:<\/strong> varia \u00e0 volta do furo - pequeno de um lado, maior do lado oposto.<\/li>\n<li><strong>Quantifica\u00e7\u00e3o:<\/strong> excentricidade = (g<sub>m\u00e1ximo<\/sub> - g<sub>min<\/sub>) \/ g<sub>m\u00e9dia<\/sub>, expresso em percentagem.<\/li>\n<li><strong>Limite aceit\u00e1vel:<\/strong> normalmente &lt; 10% para um funcionamento correto.<\/li>\n<\/ul>\n<p>Os engenheiros distinguem ainda <strong>excentricidade est\u00e1tica<\/strong> (o rotor fica descentrado, mas o ponto estreito permanece num local fixo - normalmente um erro de furo ou de montagem) de <strong>excentricidade din\u00e2mica<\/strong> (o ponto estreito roda com o eixo - um rotor curvado ou exc\u00eantrico). Os dois produzem assinaturas espectrais subtilmente diferentes, o que permite que os diagn\u00f3sticos os distingam.<\/p>\n<h3>Causas da excentricidade<\/h3>\n<ul>\n<li><strong>Desgaste dos rolamentos:<\/strong> deixa o rotor assentar descentrado na sua caixa.<\/li>\n<li><strong>Toler\u00e2ncias de fabrico:<\/strong> o furo do estator ou o rotor n\u00e3o s\u00e3o perfeitamente conc\u00eantricos.<\/li>\n<li><strong>Erros de montagem:<\/strong> tampas de extremidade desalinhadas ou um rotor inclinado.<\/li>\n<li><strong>Distor\u00e7\u00e3o t\u00e9rmica:<\/strong> aquecimento desigual a deformar a circularidade.<\/li>\n<li><strong>Distor\u00e7\u00e3o da carca\u00e7a:<\/strong> <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/soft-foot\/\">pata mole<\/a> ou tens\u00e3o de montagem torcendo a estrutura e o furo.<\/li>\n<\/ul>\n<h3>Efeitos da excentricidade<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/magnetic-pull\/\">Atra\u00e7\u00e3o magn\u00e9tica desequilibrada<\/a> (UMP):<\/strong> uma for\u00e7a radial l\u00edquida que puxa o rotor para o lado de menor entreferro, o que tende a piorar a excentricidade num ciclo de realimenta\u00e7\u00e3o.<\/li>\n<li><strong>Vibra\u00e7\u00e3o em frequ\u00eancias relacionadas com a rede:<\/strong> a excentricidade est\u00e1tica normalmente aumenta um pico a 2\u00d7 da frequ\u00eancia de alimenta\u00e7\u00e3o <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/electrical-frequency\/\">frequ\u00eancia el\u00e9trica<\/a> (100 Hz numa alimenta\u00e7\u00e3o de 50 Hz, 120 Hz em 60 Hz), enquanto a excentricidade din\u00e2mica aparece sobretudo a 1\u00d7 da velocidade de rota\u00e7\u00e3o, com bandas laterais de passagem dos polos.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/pole-pass-frequency\/\">Frequ\u00eancia de passagem de p\u00f3lo<\/a> bandas laterais:<\/strong> uma assinatura de diagn\u00f3stico reveladora que se situa no pico de frequ\u00eancia da linha.<\/li>\n<li><strong>Sobrecarga do rolamento:<\/strong> o UMP assim\u00e9trico carrega um lado do rolamento, acelerando o desgaste.<\/li>\n<li><strong>Perda de efici\u00eancia:<\/strong> um circuito magn\u00e9tico distorcido nunca \u00e9 o ideal.<\/li>\n<\/ul>\n<h2>5. Medi\u00e7\u00e3o e avalia\u00e7\u00e3o do entreferro<\/h2>\n<h3>Medi\u00e7\u00e3o direta (motor desmontado)<\/h3>\n<ul>\n<li><strong>Apalpa-folgas (calibradores de l\u00e2minas):<\/strong> inserir l\u00e2minas apalpa-folgas entre o rotor e o estator em v\u00e1rios locais.<\/li>\n<li><strong>Procedimento:<\/strong> medir em 8-12 posi\u00e7\u00f5es uniformemente espa\u00e7adas em torno da circunfer\u00eancia.<\/li>\n<li><strong>Calcular:<\/strong> a m\u00e9dia, o m\u00ednimo, o m\u00e1ximo e a percentagem de excentricidade resultante.<\/li>\n<li><strong>Quando:<\/strong> durante uma revis\u00e3o do motor ou substitui\u00e7\u00e3o de rolamentos, quando o rotor est\u00e1 fora.<\/li>\n<\/ul>\n<h3>Avalia\u00e7\u00e3o indireta (funcionamento do motor)<\/h3>\n<p>Raramente se consegue desmontar uma m\u00e1quina em funcionamento, pelo que o estado do entreferro \u00e9 normalmente inferido a partir das suas assinaturas el\u00e9ctricas e mec\u00e2nicas utilizando <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/vibration-analysis\/\">an\u00e1lise de vibra\u00e7\u00e3o<\/a>:<\/p>\n<ul>\n<li><strong>Vibra\u00e7\u00e3o a 2\u00d7 a frequ\u00eancia da linha:<\/strong> uma amplitude elevada sugere um entreferro n\u00e3o uniforme \u2014 confirme com verifica\u00e7\u00f5es de corrente e de carga\/sem carga, uma vez que o desequil\u00edbrio da alimenta\u00e7\u00e3o e a resson\u00e2ncia da estrutura podem elevar o mesmo pico.<\/li>\n<li><strong>Bandas laterais de passagem de p\u00f3lo:<\/strong> a sua presen\u00e7a e amplitude acompanham o grau de excentricidade.<\/li>\n<li><strong>An\u00e1lise da assinatura da corrente do motor (MCSA):<\/strong> os efeitos do entreferro modulam a corrente do estator e aparecem no seu espetro.<\/li>\n<li><strong>Ru\u00eddo ac\u00fastico:<\/strong> a intensidade do zumbido eletromagn\u00e9tico aumenta frequentemente com a excentricidade.<\/li>\n<\/ul>\n<p>No terreno, um instrumento de dois canais, como o <a href=\"https:\/\/vibromera.eu\/pt\/produto\/balanset-1\/\">Balanset-1A<\/a> torna esta avalia\u00e7\u00e3o pr\u00e1tica: com <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/accelerometer\/\">aceler\u00f3metros<\/a> nas caixas de rolamentos do motor, captura a <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/spectrum\/\">espetro de vibra\u00e7\u00e3o<\/a> \u00e0 velocidade de funcionamento, permitindo ao analista detetar o pico de frequ\u00eancia de linha 2\u00d7 e as suas bandas laterais de passagem de p\u00f3lo sem parar a produ\u00e7\u00e3o. Uma vez que os sintomas do entreferro se sobrep\u00f5em a sintomas mec\u00e2nicos simples <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/unbalance\/\">desequil\u00edbrio<\/a>, se o pico suspeito desaparecer no momento em que o motor \u00e9 desenergizado, o analista confirma a sua origem el\u00e9ctrica - um truque de desacelera\u00e7\u00e3o que as avarias mec\u00e2nicas n\u00e3o conseguem fingir. Pode converter a velocidade de funcionamento e a frequ\u00eancia da linha nos picos exactos a procurar com o nosso <a href=\"https:\/\/vibromera.eu\/pt\/calculators\/motor-electrical-frequencies\/\">Calculadora de Frequ\u00eancia de Defeitos El\u00e9tricos em Motores<\/a>, e verificar o n\u00edvel global medido em rela\u00e7\u00e3o aos limites com o <a href=\"https:\/\/vibromera.eu\/pt\/calculators\/vibration-velocity\/\">Ferramenta de velocidade de vibra\u00e7\u00e3o ISO 20816<\/a>.<\/p>\n<h2>6. Problemas e solu\u00e7\u00f5es do entreferro<\/h2>\n<h3>Demasiado pequeno (abaixo da especifica\u00e7\u00e3o m\u00ednima)<\/h3>\n<p><strong>Consequ\u00eancias:<\/strong> risco de contacto rotor-estator em caso de vibra\u00e7\u00e3o ou deflex\u00e3o; tra\u00e7\u00e3o magn\u00e9tica muito elevada se a abertura tamb\u00e9m for exc\u00eantrica; danos durante o arranque ou transientes.<\/p>\n<ul>\n<li>Erro de fabrico \u2192 refazer o rotor ou o estator.<\/li>\n<li>Rotor incorreto instalado \u2192 Substitua pelo rotor correto<\/li>\n<li>Desgaste das chumaceiras que deixa deslocar o rotor \u2192 substituir as chumaceiras e verificar se a folga \u00e9 restabelecida.<\/li>\n<\/ul>\n<h3>Demasiado grande (acima da especifica\u00e7\u00e3o m\u00e1xima)<\/h3>\n<p><strong>Consequ\u00eancias:<\/strong> efici\u00eancia reduzida devido a uma corrente de magnetiza\u00e7\u00e3o mais elevada, menor fator de pot\u00eancia, bin\u00e1rio de arranque reduzido e corrente em vazio mais elevada. Esta condi\u00e7\u00e3o \u00e9 normalmente menos cr\u00edtica - a m\u00e1quina pode funcionar, mas com um desempenho degradado.<\/p>\n<h3>N\u00e3o uniforme (exc\u00eantrico) - o caso comum e problem\u00e1tico<\/h3>\n<p>A excentricidade \u00e9 o defeito de entreferro mais frequente e mais prejudicial, porque se auto-refor\u00e7a: a UMP puxa o rotor ainda mais para fora do centro, o que aumenta a UMP. Normalmente cria vibra\u00e7\u00e3o a 2\u00d7 a frequ\u00eancia da rede (excentricidade est\u00e1tica) ou vibra\u00e7\u00e3o 1\u00d7 com bandas laterais de passagem de polos (excentricidade din\u00e2mica) e acelera o desgaste dos rolamentos atrav\u00e9s desse ciclo de realimenta\u00e7\u00e3o positiva. A solu\u00e7\u00e3o \u00e9 substituir rolamentos gastos, corrigir qualquer deforma\u00e7\u00e3o da estrutura e verificar a concentricidade do rotor.<\/p>\n<h3>Refer\u00eancia r\u00e1pida de diagn\u00f3stico<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Sintoma<\/th>\n<th>Prov\u00e1vel problema de entreferro<\/th>\n<\/tr>\n<tr>\n<td>Elevada vibra\u00e7\u00e3o de frequ\u00eancia de linha 2\u00d7<\/td>\n<td>Entreferro exc\u00eantrico, tra\u00e7\u00e3o magn\u00e9tica desequilibrada<\/td>\n<\/tr>\n<tr>\n<td>Bandas laterais de frequ\u00eancia de passagem de p\u00f3lo<\/td>\n<td>Folga n\u00e3o uniforme<\/td>\n<\/tr>\n<tr>\n<td>Corrente de vazio elevada<\/td>\n<td>Folga excessiva<\/td>\n<\/tr>\n<tr>\n<td>Baixo bin\u00e1rio de arranque<\/td>\n<td>Folga excessiva<\/td>\n<\/tr>\n<tr>\n<td>Provas de fric\u00e7\u00e3o<\/td>\n<td>Folga insuficiente<\/td>\n<\/tr>\n<tr>\n<td>Desgaste assim\u00e9trico do rolamento<\/td>\n<td>Folga exc\u00eantrica que cria UMP<\/td>\n<\/tr>\n<\/table>\n<h2>7. Tend\u00eancias, conce\u00e7\u00e3o e fabrico<\/h2>\n<p>Uma vez que a excentricidade se desenvolve lentamente, a componente de frequ\u00eancia de linha 2\u00d7 \u00e9 um par\u00e2metro ideal para <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/trending\/\">tend\u00eancia<\/a> ao longo da vida de um motor. Um pico de 2\u00d7 em constante crescimento assinala o desenvolvimento de excentricidade - quase sempre devido ao desgaste do rolamento - e alimenta diretamente as decis\u00f5es de substitui\u00e7\u00e3o do rolamento. Uma boa pr\u00e1tica \u00e9 documentar as medi\u00e7\u00f5es do entreferro com apalpa-folgas em cada revis\u00e3o e compar\u00e1-las com a especifica\u00e7\u00e3o da placa de identifica\u00e7\u00e3o e com a leitura anterior.<\/p>\n<p>Do ponto de vista da conce\u00e7\u00e3o, o entreferro \u00e9 o resultado de um compromisso deliberado:<\/p>\n<ul>\n<li><strong>Entreferro menor:<\/strong> melhor efici\u00eancia, fator de pot\u00eancia e bin\u00e1rio, mas maior tra\u00e7\u00e3o magn\u00e9tica quando exc\u00eantrico e menor folga mec\u00e2nica.<\/li>\n<li><strong>Entreferro maior:<\/strong> mais folga mec\u00e2nica e menor atra\u00e7\u00e3o magn\u00e9tica, mas pior efici\u00eancia e maior corrente de magnetiza\u00e7\u00e3o.<\/li>\n<li><strong>Otimiza\u00e7\u00e3o:<\/strong> a menor folga compat\u00edvel com os requisitos mec\u00e2nicos e as toler\u00e2ncias de fabrico poss\u00edveis.<\/li>\n<\/ul>\n<p>Os desenhos especificam uma folga nominal com toler\u00e2ncias de cerca de \u00b110-20%, um limite de excentricidade (frequentemente &lt; 10%) e verifica\u00e7\u00e3o do controlo de qualidade durante o fabrico. Manter essa folga uniforme atrav\u00e9s de uma manuten\u00e7\u00e3o disciplinada dos rolamentos - e verific\u00e1-la atrav\u00e9s de tend\u00eancias de vibra\u00e7\u00e3o - \u00e9 o que mant\u00e9m um motor eficiente, silencioso e seguro contra o contacto catastr\u00f3fico rotor-estator que acaba com a vida de uma m\u00e1quina em segundos.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/\">\u2190 Voltar ao \u00edndice principal<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Aprenda sobre o entreferro, a folga radial entre o rotor e o estator do motor, fundamental para o desempenho eletromagn\u00e9tico, a efici\u00eancia e para evitar a atra\u00e7\u00e3o magn\u00e9tica e o contato entre o rotor e o estator.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-20618","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary\/20618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary\/20618\/revisions"}],"predecessor-version":[{"id":102159,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary\/20618\/revisions\/102159"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/media?parent=20618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/categories?post=20618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/tags?post=20618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}