{"id":215,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/rotor-bar-defects\/"},"modified":"2026-07-03T09:57:24","modified_gmt":"2026-07-03T09:57:24","slug":"rotor-bar-defects","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/rotor-bar-defects\/","title":{"rendered":"Hvad er rotorbj\u00e6lkefejl? Kn\u00e6kkede bj\u00e6lker i motorer"},"content":{"rendered":"<h1>Forst\u00e5else af rotorstangsfejl<\/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\/da\/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\/da\/product\/balanset-1\/\" title=\"B\u00e6rbart afbalanceringsapparat og vibrationsanalysator 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 komplet s\u00e6t med b\u00e6rbar afbalanceringsenhed og vibrationsanalysator\" 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\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/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\/da\/product\/balanset-1\/\" title=\"B\u00e6rbart afbalanceringsapparat og vibrationsanalysator Balanset-1A\">B\u00e6rbart afbalanceringsapparat og vibrationsanalysator 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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e6g i kurv: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">\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=\"Balanset-1A vibrationssensor i n\u00e6rbillede\" 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\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/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\/da\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">Vibrationssensor<\/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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e6g i kurv: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (laser-tachometer)\">\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=\"Optisk sensor (laser-tachometer)\" 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\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/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\/da\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (laser-tachometer)\">Optisk sensor (laser-tachometer)<\/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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e6g i kurv: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/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=\"Vibromera rotorbalanceringss\u00e6t: b\u00e6retaske, flerkanals signalbehandler, h\u00e5ndholdt analysator, magnetisk base, vibrationssensorer og spiralkabler.\" 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\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/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\/da\/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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e6g i kurv: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/product\/magnet-stand\/\" title=\"Magnetisk stativ 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=\"Magnetbase.\" 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\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/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\/da\/product\/magnet-stand\/\" title=\"Magnetisk stativ Insize-60-kgf\">Magnetisk stativ 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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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\" 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src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Reflekterende tape\" 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\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/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\/da\/product\/reflective-tape\/\" title=\"Reflekterende tape\">Reflekterende tape<\/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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e6g i kurv: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balancer &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=\"Balanset-1A-s\u00e6t med interface-enhed, sensorer, omdrejningst\u00e6ller og tilbeh\u00f8r\" 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\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/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\/da\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balancer &quot;Balanset-1A&quot; OEM\">Dynamisk balancer \"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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e6g i kurv: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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><strong>Rotorstangsdefekter<\/strong> \u2014 ogs\u00e5 kaldet brudte eller revnede rotorst\u00e6nger \u2014 er brud, revner eller forbindelser med h\u00f8j modstand i lederst\u00e6ngerne i en induktionsmotors kortslutnings <a href=\"https:\/\/vibromera.eu\/da\/glossary\/motor-defects\/\">motor<\/a> rotor. En kortsluttet rotor er konstrueret af aluminiums- eller kobberst\u00e6nger, der er indlejret i spalterne i en lamineret jernkerne, hvor begge ender af hver stang er forbundet med et par kortslutningsringe (enderinge). N\u00e5r en stang br\u00e6kker, eller en ende-ring-forbindelse revner, kan str\u00f8mmen ikke l\u00e6ngere l\u00f8be uhindret gennem den beskadigede leder. Resultatet er elektromagnetisk asymmetri, pulserende drejningsmoment og en meget genkendelig <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a> og str\u00f8msignatur kendetegnet ved <a href=\"https:\/\/vibromera.eu\/da\/glossary\/sidebands\/\">sideb\u00e5nd<\/a> fordelt p\u00e5 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/pole-pass-frequency\/\">frekvens for polpass<\/a> (antallet af poler \u00d7 slipfrekvensen).<\/p>\n<p>Svigt i rotorst\u00e6ngerne udg\u00f8r ansl\u00e5et 10\u201315 % af alle nedbrud i induktionsmotorer. De er farlige netop fordi de er gradvise: et enkelt <a href=\"https:\/\/vibromera.eu\/da\/glossary\/broken-rotor-bars\/\">brudt rotorstang<\/a> overbelaster de tilst\u00f8dende ledere, og hvad der starter med en revnet leder, kan udvikle sig til flere brud, kraftige drejningsmomentpulseringer og i sidste ende \u00f8del\u00e6gge rotoren, hvis det ikke opdages i tide.<\/p>\n<h2>1. Typer af rotorstangsdefekter<\/h2>\n<p>Denne fejlgruppe omfatter flere forskellige mekanismer, som alle forstyrrer rotorens elektriske symmetri p\u00e5 lignende m\u00e5der:<\/p>\n<ul>\n<li><strong>Brudte rotorskinner:<\/strong> Et fuldst\u00e6ndigt brud p\u00e5 en lederstang, som oftest forekommer i n\u00e6rheden af en endering, hvor termiske og mekaniske belastninger koncentreres. Et brud starter n\u00e6sten altid som en udmattelsesrevne og udvikler sig til en fuldst\u00e6ndig brudflade.<\/li>\n<li><strong>Revnede enderinge:<\/strong> Brud i de kortslutningsringe, der holder st\u00e6ngerne sammen, oftest ved samlingen mellem stang og ring. Deres elektriske virkning svarer til en brudt stang. De forekommer oftere i store maskiner, i motorer, der starter hyppigt, og ved belastninger med stor inerti.<\/li>\n<li><strong>Samlinger med h\u00f8j modstandsdygtighed:<\/strong> En d\u00e5rlig elektrisk forbindelse mellem stangen og enderingen for\u00e5rsaget af produktionsfejl, termiske cyklusser eller korrosion. Symptomerne ligner en brudt stang, men er ofte sporadiske og giver mere subtile tegn end et rent brud.<\/li>\n<li><strong>Rotor-por\u00f8sitet:<\/strong> St\u00f8behulrum i trykst\u00f8bte aluminiumsrotorer, der mindsker ledernes effektive tv\u00e6rsnit. Por\u00f8sitet er en produktionsfejl, der kan ligge i dvale i \u00e5revis, f\u00f8r den udvikler sig til revner og brud.<\/li>\n<\/ul>\n<h2>2. Hvorfor g\u00e5r rotorst\u00e6nger i stykker?<\/h2>\n<p>Fejl i st\u00e6ngerne skyldes en kombination af termiske, mekaniske, produktionsm\u00e6ssige og driftsm\u00e6ssige faktorer, der forst\u00e6rker hinanden i l\u00f8bet af motorens levetid.<\/p>\n<h3>Thermal stress<\/h3>\n<p>Hver gang motoren startes og stoppes, gennemg\u00e5r rotoren en cyklus af udvidelse og sammentr\u00e6kning. Da aluminium udvider sig langt mere end den omgivende jernkerne, medf\u00f8rer denne forskel i udvidelse, at st\u00e6ngerne l\u00f8snes, og samlingerne uds\u00e6ttes for udmattelse. Hyppige opstarter medf\u00f8rer gentagne termiske st\u00f8d, og ethvert sted med h\u00f8j modstand bliver et varmt punkt, der fremskynder skaderne.<\/p>\n<h3>Mekanisk belastning<\/h3>\n<p>Lederst\u00e6ngerne uds\u00e6ttes ogs\u00e5 for <a href=\"https:\/\/vibromera.eu\/da\/glossary\/centrifugal-force\/\">centrifugalkraft<\/a> (vigtigt i h\u00f8jhastighedsmaskiner), pulserende elektromagnetiske kr\u00e6fter under normal drift samt de store str\u00f8mme ved opstart, der for\u00e5rsager mekaniske st\u00f8d. Eksterne <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration-analysis\/\">vibrationer<\/a> Den kraft, der overf\u00f8res fra den drevne last, medf\u00f8rer yderligere udmattelse af st\u00e6ngerne.<\/p>\n<h3>Fabrikationsfejl og driftsforhold<\/h3>\n<p>Por\u00f8sitet i st\u00f8begodset, svag binding mellem stang og endering, materialeindeslutninger og utilstr\u00e6kkelig varmebehandling l\u00e6gger alle grunden til senere svigt. Under drift er de st\u00f8rste risikofaktorer hyppige opstarter, belastninger med h\u00f8j inerti og lange accelerationstider, tilf\u00e6lde af fastl\u00e5st rotor med de dertil h\u00f8rende ekstreme str\u00f8mstyrker samt enfaset drift \u2013 dvs. drift med tab af en af forsyningsfaserne, hvilket tvinger et st\u00e6rkt asymmetrisk str\u00f8mm\u00f8nster gennem rotorburet.<\/p>\n<h2>3. Vibrations- og str\u00f8msignaturen<\/h2>\n<p>Det karakteristiske diagnostiske tr\u00e6k ved skader p\u00e5 rotorst\u00e6ngerne er en r\u00e6kke sideb\u00e5nd, der er koncentreret omkring driftshastigheden.<\/p>\n<ul>\n<li><strong>Central top:<\/strong> 1\u00d7 l\u00f8behastighed (f<sub>r<\/sub>), den normale <a href=\"https:\/\/vibromera.eu\/da\/glossary\/running-speed\/\">L\u00f8behastighed<\/a> line.<\/li>\n<li><strong>Sideb\u00e5nd:<\/strong> symmetriske par ved f<sub>r<\/sub> \u00b1 F<sub>P<\/sub>, f<sub>r<\/sub> \u00b1 2F<sub>P<\/sub>, f<sub>r<\/sub> \u00b1 3F<sub>P<\/sub>, where F<sub>P<\/sub> er polpassagefrekvensen - antallet af poler \u00d7 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/slip-frequency\/\">slipfrekvens<\/a> (typisk nogle f\u00e5 hertz).<\/li>\n<li><strong>M\u00f8nster:<\/strong> j\u00e6vnt fordelte, symmetriske sideb\u00e5nd ved polpassageintervaller - helt anderledes end sideb\u00e5ndene fra <a href=\"https:\/\/vibromera.eu\/da\/glossary\/bearing-fault-frequencies\/\">bearing faults<\/a>, som ligger omkring defektfrekvenserne.<\/li>\n<\/ul>\n<h3>Beregning af slip- og polpassagefrekvenser<\/h3>\n<p>Slipfrekvensen er forskellen mellem den synkrone hastighed og den faktiske hastighed, udtrykt i hertz: f<sub>s<\/sub> = (N<sub>synkronisering<\/sub> \u2212 N<sub>faktisk<\/sub>) \/ 60, og sideb\u00e5ndsafstanden er polpassagefrekvensen F<sub>P<\/sub> = poles \u00d7 f<sub>s<\/sub>. Betragt en 4-polet, 60 Hz-motor med en synkron hastighed p\u00e5 1800 rpm, der k\u00f8rer ved 1750 rpm under belastning. S\u00e5 er f<sub>s<\/sub> = (1800 \u2212 1750) \/ 60 = 0.833 Hz, F<sub>P<\/sub> = 4 \u00d7 0.833 = 3.33 Hz, and the running-speed line sits at 29.17 Hz. Sidebands therefore appear at 29.17 \u00b1 3.33 Hz \u2014 that is, at 25.8 Hz and 32.5 Hz. A <a href=\"https:\/\/vibromera.eu\/da\/calculators\/harmonic-frequency-calculator\/\">Beregner til harmoniske frekvenser<\/a> og en <a href=\"https:\/\/vibromera.eu\/da\/calculators\/motor-slip-calculator\/\">motorslip-beregner<\/a> g\u00f8r denne omstilling nem, n\u00e5r du ops\u00e6tter en m\u00e5ling p\u00e5 produktionsgulvet.<\/p>\n<h3>Lastafh\u00e6ngighed<\/h3>\n<p>Da glidningen \u2013 og dermed str\u00f8mmen i de brudte st\u00e6nger \u2013 stiger med belastningen, er sideb\u00e5ndene belastningsafh\u00e6ngige. Uden belastning er de minimale; ved let belastning begynder de at vise sig; og ved fuld belastning er de st\u00e6rkest og lettest at diagnosticere. Den praktiske regel er enkel: Test altid en motor, der giver anledning til mistanke, under normal driftsbelastning for at opn\u00e5 den bedste f\u00f8lsomhed.<\/p>\n<h3>Str\u00f8msignatur (MCSA)<\/h3>\n<p>Analyse af motorstr\u00f8mssignaturer afsl\u00f8rer de samme fysiske principper p\u00e5 det elektriske omr\u00e5de. Her samler sideb\u00e5ndene sig omkring <a href=\"https:\/\/vibromera.eu\/da\/glossary\/electrical-frequency\/\">netfrekvens<\/a> snarere end omdrejningsfrekvensen, og de optr\u00e6der ved f<sub>linje<\/sub> \u00b1 2\u00b7s\u00b7f<sub>linje<\/sub>, hvor s er slip i per unit - de samme \u00b1F<sub>P<\/sub> spacing as in vibration, since 2\u00b7s\u00b7f<sub>linje<\/sub> = F<sub>P<\/sub>. For den 4-polede 60 Hz-motor ovenfor (s = 50\/1800 \u2248 2.8%) giver det sideb\u00e5nd ved 56.7 Hz og 63.3 Hz. Deres amplitude stiger med antallet af br\u00e6kkede st\u00e6nger, og i nogle tilf\u00e6lde registrerer MCSA fejlen tidligere end vibration g\u00f8r. Den samme sliprelaterede fysik ligger bag den besl\u00e6gtede <a href=\"https:\/\/vibromera.eu\/da\/glossary\/pole-pass-frequency\/\">frekvens for polpass<\/a> used in <a href=\"https:\/\/vibromera.eu\/da\/glossary\/electrical-faults\/\">elektrisk fejl<\/a> diagnosis.<\/p>\n<h2>4. P\u00e5visning, diagnose og feltm\u00e5ling<\/h2>\n<p>At kunne opl\u00f8se sideb\u00e5nd kun f\u00e5 hertz fra en dominerende top ved drifthastighed kr\u00e6ver fin frekvensopl\u00f8sning. En disciplineret procedure forl\u00f8ber s\u00e5dan:<\/p>\n<ol>\n<li><strong>Beregn det forventede m\u00f8nster:<\/strong> bestem den synkrone hastighed ud fra poltal og netfrekvens, m\u00e5l den faktiske drifthastighed og beregn slip- og polpassagefrekvenserne.<\/li>\n<li><strong>Indhent et spektrum i h\u00f8j opl\u00f8sning:<\/strong> use a fine <a href=\"https:\/\/vibromera.eu\/da\/glossary\/fft\/\">FFT<\/a> opl\u00f8sning (bedre end ca. 0,2 Hz), s\u00e5 de t\u00e6tliggende sideb\u00e5nd adskiller sig tydeligt fra 1\u00d7-linjen. A <a href=\"https:\/\/vibromera.eu\/da\/calculators\/fft-resolution-calculator\/\">Beregner til FFT-opl\u00f8sning<\/a> hj\u00e6lper dig med at v\u00e6lge den rigtige bredde og det rigtige antal linjer.<\/li>\n<li><strong>S\u00f8g efter sideb\u00e5nd:<\/strong> look for symmetric peaks at 1\u00d7 \u00b1 pole-pass frequency and its multiples.<\/li>\n<li><strong>Test under belastning:<\/strong> indsamle data, mens motoren k\u00f8rer med sin normale driftsbelastning.<\/li>\n<li><strong>Bekr\u00e6ft m\u00f8nsteret:<\/strong> Kontroller, at sideb\u00e5ndene er symmetriske og har den rette afstand, inden der stilles en diagnose.<\/li>\n<\/ol>\n<p>Denne form for spektrumoptagelse i h\u00f8j opl\u00f8sning er netop den opgave, som et b\u00e6rbart tokanalsinstrument som f.eks. <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> er bygget til. Ved at arbejde i motorens egne lejer ved driftshastighed registrerer den linjen for drifthastighed og dens polpassagesideb\u00e5nd direkte p\u00e5 den k\u00f8rende maskine, s\u00e5 du kan bekr\u00e6fte en diagnose af br\u00e6kkede st\u00e6nger p\u00e5 stedet uden demontering og derefter f\u00f8lge alvorlighedsgraden over tid.<\/p>\n<h3>Vurdering af alvorlighedsgrad<\/h3>\n<p>En udbredt tommelfingerregel inddeler sv\u00e6rhedsgraden efter sideb\u00e5ndenes h\u00f8jde i forhold til 1\u00d7-toppen:<\/p>\n<ul>\n<li><strong>Sideb\u00e5nd under 40 % af 1\u00d7:<\/strong> muligvis en enkelt revnet eller brudt stang \u2014 hold \u00f8je med den.<\/li>\n<li><strong>40\u201360 % af 1\u00d7:<\/strong> en eller flere st\u00e6nger, der er bekr\u00e6ftet brudt \u2014 planl\u00e6g udskiftning.<\/li>\n<li><strong>Over 60 % af 1\u00d7:<\/strong> Flere brudte st\u00e6nger \u2014 udskiftning er p\u00e5kr\u00e6vet hurtigst muligt.<\/li>\n<li><strong>Sideb\u00e5nd, der er h\u00f8jere end 1\u00d7-toppen:<\/strong> en alvorlig tilstand, der kr\u00e6ver \u00f8jeblikkelig handling.<\/li>\n<\/ul>\n<h2>5. Konsekvenser og forl\u00f8b<\/h2>\n<p>Hvis man ikke g\u00f8r noget ved det, forbliver en enkelt fejl sj\u00e6ldent en enkelt fejl. Skaden udvikler sig gennem tydelige faser:<\/p>\n<ul>\n<li><strong>F\u00f8rste fejl (\u00e9n stang):<\/strong> let drejningsmomentpulsering, sm\u00e5 fremkommende sideb\u00e5nd og minimalt tab af ydeevne. En motor kan k\u00f8re i flere m\u00e5neder i denne tilstand.<\/li>\n<li><strong>Gradvise svigt (flere st\u00e6nger):<\/strong> Den str\u00f8m, der burde v\u00e6re l\u00f8bet gennem den brudte stang, ledes over p\u00e5 de tilst\u00f8dende st\u00e6nger og f\u00e5r dem til at blive overophedede; den termiske belastning f\u00e5r derefter ogs\u00e5 disse st\u00e6nger til at br\u00e6kke. Momentudsving og vibrationer tager til, og en maskine kan g\u00e5 i stykker p\u00e5 grund af alt fra \u00e9n til flere brudte st\u00e6nger i l\u00f8bet af f\u00e5 uger.<\/li>\n<li><strong>Alvorlig tilstand:<\/strong> Flere brudte st\u00e6nger i n\u00e6rheden af hinanden for\u00e5rsager kraftige drejningsmomentudsving, kraftige vibrationer og st\u00f8j samt overophedning af rotoren. Det ender med, at rotoren g\u00e5r helt i stykker, med en reel risiko for f\u00f8lgeskader <a href=\"https:\/\/vibromera.eu\/da\/glossary\/stator-defects\/\">stator<\/a> skader fra de kraftige cirkulationsstr\u00f8mme.<\/li>\n<\/ul>\n<h2>6. Afhj\u00e6lpende foranstaltninger og forebyggelse<\/h2>\n<p>N\u00e5r en fejl er bekr\u00e6ftet, skal den h\u00e5ndteres m\u00e5lrettet i stedet for at afvente svigt:<\/p>\n<ul>\n<li><strong>Ved registrering:<\/strong> indstram overv\u00e5gningsintervallet (fra m\u00e5nedligt til ugentligt), bekr\u00e6ft diagnosen ved hj\u00e6lp af MCSA, planl\u00e6g udskiftning af motor eller rotor, s\u00f8rg for at have en reservedel klar til kritiske opgaver, og unders\u00f8g, hvorfor st\u00e6ngerne overhovedet br\u00f8d.<\/li>\n<li><strong>Reparationsmuligheder:<\/strong> Udskiftning af rotoren er den mest p\u00e5lidelige l\u00f8sning for store maskiner; udskiftning af hele motoren er ofte den mest \u00f8konomiske l\u00f8sning for sm\u00e5 maskiner; specialforretninger kan omst\u00f8be aluminiumsrotorer; og hvis der kun er \u00e9n brudt stang, kan maskinen i visse tilf\u00e6lde forts\u00e6tte driften i begr\u00e6nset omfang under n\u00f8je overv\u00e5gning.<\/li>\n<li><strong>Forebyggelse:<\/strong> Begr\u00e6ns hyppige opstarter ved hj\u00e6lp af softstartere eller frekvensomformere, undg\u00e5 enfaset drift, s\u00f8rg for tilstr\u00e6kkelig ventilation og k\u00f8ling, v\u00e6lg motorer, der er dimensioneret til den faktiske driftscyklus, og s\u00f8rg for tidlig fejldetektion, s\u00e5 der kan gribes ind, inden fejlen forv\u00e6rres.<\/li>\n<\/ul>\n<p>Fejl i rotorst\u00e6nger er blandt de mest diagnostisk karakteristiske motorfejl: deres karakteristiske polpassagesideb\u00e5nd g\u00f8r dem p\u00e5lideligt detekterbare gennem b\u00e5de <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration-diagnostics\/\">vibrationsdiagnostik<\/a> og str\u00f8manalyse. Ved at opdage dem i tide kan man forvandle et potentielt katastrofalt rotorsvigt og l\u00e6ngerevarende uplanlagt driftsstop til en planlagt og h\u00e5ndterbar reparation.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/da\/glossary\/\">\u2190 Tilbage til hovedindekset<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e6r om rotorstangsdefekter i kortslutningsmotorer, herunder kn\u00e6kkede st\u00e6nger og revnede endringe, der kan detekteres gennem slipfrekvenssideb\u00e5nd i vibrations- og str\u00f8manalyser.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-215","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/215\/revisions"}],"predecessor-version":[{"id":102163,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/215\/revisions\/102163"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}