{"id":268,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/thermal-bow\/"},"modified":"2026-05-23T23:06:51","modified_gmt":"2026-05-23T23:06:51","slug":"thermal-bow","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/thermal-bow\/","title":{"rendered":"Hvad er termisk b\u00f8jning? Temperaturinduceret akselb\u00f8jning"},"content":{"rendered":"<h1>Forst\u00e5else af termisk b\u00f8jning i roterende maskineri<\/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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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=\"L\u00e6g i kurv: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\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_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\/da\/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\/da\/product\/reflective-tape\/\" title=\"Reflekterende tape\">\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=\"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\/268?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\/268?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\/268?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\/268?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>Termisk bue<\/strong> (ogs\u00e5 kaldet varm b\u00f8jning, termisk b\u00f8jning eller temperaturinduceret skaftb\u00f8jning) er en midlertidig krumning, der udvikler sig i en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor\/\">Rotor<\/a> akslen, n\u00e5r temperaturen ikke er ensartet rundt om dens omkreds. N\u00e5r den ene side af akslen bliver varmere end den modsatte side, udvider den varme side sig mere, bliver l\u00e6ngere og tvinger akslen til at bule, hvor den varme side ligger p\u00e5 den konvekse (ydre) side af kurven. I mods\u00e6tning til den permanente <a href=\"https:\/\/vibromera.eu\/da\/glossary\/shaft-bow\/\">akselb\u00f8jning<\/a> som f\u0413\u0451lger efter mekanisk skade, er termisk b\u0413\u0451jning reversibel: den aftager, n\u0413\u0490r akslen vender tilbage til en ensartet temperatur. Alligevel kan den for\u0413\u0490rsage kraftige <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a> under opvarmning og afk\u00f8ling, og hvis det er alvorligt eller gentages i det uendelige, kan det efterlade varige skader.<\/p>\n<h2>1. Definition: Hvad termisk b\u0413\u0451jning er<\/h2>\n<p>Termisk b\u00f8jning kan bedst betragtes som en midlertidig geometrisk fejl. Akslen er ikke blevet deformeret, og der er intet galt med dens massefordeling; den bliver ganske enkelt b\u00f8jet i realtid af en temperaturgradient p\u00e5 tv\u00e6rs af dens diameter. Da b\u00f8jningen er geometrisk og roterer sammen med akslen, ligger den resulterende vibration p\u00e5 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/running-speed\/\">l\u00f8behastighed<\/a> og ser i et spektrum n\u0413\u00a6sten pr\u0413\u00a6cis ud som <a href=\"https:\/\/vibromera.eu\/da\/glossary\/unbalance\/\">ubalance<\/a>. Den afg\u00f8rende forskel er, at termisk b\u00f8jning kommer og g\u00e5r med temperaturen, mens ubalance er en fast tilstand. Netop dette adf\u00e6rdsm\u00e6ssige tegn \u2013 vibrationer, der afspejler maskinens termiske tilstand snarere end dens hastighed \u2013 er n\u00f8glen til at l\u00f8se hele diagnosen.<\/p>\n<h2>2. Fysisk mekanisme<\/h2>\n<h3>2.1 Forskellen i termisk udvidelse<\/h3>\n<p>Fysikken bag termisk b\u00f8jning er ligetil:<\/p>\n<ul>\n<li>Metal udvider sig, n\u00e5r det opvarmes (den termiske udvidelseskoefficient er typisk 10\u201315 \u00b5m\/m\/\u00b0C for st\u00e5l).<\/li>\n<li>Hvis temperaturen er ensartet hele vejen rundt, er udvidelsen symmetrisk \u2014 akslen bliver blot l\u00e6ngere, men forbliver lige.<\/li>\n<li>Hvis den ene side er varmere, udvider den side sig mere end den kolde side<\/li>\n<li>Den differentielle udvidelse medf\u00f8rer en krumning.<\/li>\n<li>B\u0413\u0451jningens st\u0413\u0451rrelse er proportional med b\u0413\u0490de temperaturforskellen og akslens l\u0413\u00a6ngde.<\/li>\n<\/ul>\n<p>Den samme koefficient, der styrer denne gradient, er ogs\u00e5 afg\u00f8rende for den aksiale v\u00e6kst og de \u00e6ndringer i pasformen, som ingeni\u00f8rer beregner andre steder; den underliggende matematik er identisk med den i en <a href=\"https:\/\/vibromera.eu\/da\/calculators\/thermal-expansion-calculator\/\">Termisk ekspansionsberegner<\/a>, der p\u00e5f\u00f8res p\u00e5 tv\u00e6rs af diameteren i stedet for p\u00e5 langs.<\/p>\n<h3>2.2 Typiske temperaturforskelle<\/h3>\n<ul>\n<li>En temperaturforskel p\u0413\u0490 10\u0432\u0402\u201c20 \u0412\u00b0C p\u0413\u0490 tv\u0413\u00a6rs af diameteren kan skabe en m\u0413\u0490lbar b\u0413\u0451jning.<\/li>\n<li>I store turbiner kan en forskel p\u0413\u0490 30\u0432\u0402\u201c50 \u0412\u00b0C give kraftige vibrationer.<\/li>\n<li>Effekten forst\u00e6rkes i takt med skaftets l\u00e6ngde, s\u00e5 l\u00e6ngere skafter er i sagens natur mere udsatte.<\/li>\n<\/ul>\n<h2>3. Almindelige \u0413\u0490rsager til termisk b\u0413\u0451jning<\/h2>\n<h3>3.1 Startbetingelser (de mest almindelige)<\/h3>\n<ul>\n<li><strong>Asymmetrisk opvarmning:<\/strong> Varm damp, gas eller procesv\u00e6ske kommer i kontakt med akselens \u00f8verste del, mens den nederste del forbliver k\u00f8ligere.<\/li>\n<li><strong>Str\u00e5levarme:<\/strong> varmen fra varme huse eller r\u0413\u0451rledninger opvarmer den \u0413\u0451verste del af akslen.<\/li>\n<li><strong>Lejefriktion:<\/strong> Et leje, der bliver varmere end de \u00f8vrige, opvarmer den del af akslen, det sidder p\u00e5.<\/li>\n<li><strong>Rapid startup:<\/strong> Hvis opvarmningstiden er for kort, opst\u00e5r der temperaturforskelle, inden de n\u00e5r at udligne hinanden.<\/li>\n<\/ul>\n<h3>3.2 Nedlukningsforhold (termisk nedb\u0413\u0451jning)<\/h3>\n<ul>\n<li><strong>Hot shutdown:<\/strong> Akslen holder op med at dreje, mens den stadig er varm.<\/li>\n<li><strong>H\u00e6ngning p\u00e5 grund af tyngdekraften:<\/strong> varme stiger, s\u0413\u0490 oversiden af en vandret aksel afk\u0413\u0451les hurtigere end undersiden.<\/li>\n<li><strong>Termisk b\u00f8jning:<\/strong> undersiden forbliver varmere i l\u0413\u00a6ngere tid, s\u0413\u0490 akslen b\u0413\u0451jer nedad.<\/li>\n<li><strong>Kritisk periode:<\/strong> de f\u00f8rste par timer efter nedlukningen.<\/li>\n<\/ul>\n<h3>3.3 Driftsm\u00e6ssige \u00e5rsager<\/h3>\n<ul>\n<li><strong>Gnidning mellem rotor og stator:<\/strong> Friktion ved kontakt skaber kraftig lokal opvarmning \u2014 en selvforst\u00e6rkende mekanisme, der unders\u00f8ges i forbindelse med <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-rub\/\">Rotorens gnidning<\/a>.<\/li>\n<li><strong>Uj\u00e6vn afk\u00f8ling:<\/strong> asymmetrisk luftstr\u00f8m eller vandspr\u00f8jt.<\/li>\n<li><strong>Solar heating:<\/strong> udend\u00f8rsudstyr, hvor den ene side er solvendt.<\/li>\n<li><strong>Processforstyrrelser:<\/strong> pludselige temperatur\u00e6ndringer i arbejdsv\u00e6sken.<\/li>\n<\/ul>\n<p>Man skal v\u0413\u00a6re s\u0413\u00a6rlig opm\u0413\u00a6rksom p\u0413\u0490 gnidningsproblemet. En let gnidning opvarmer et bestemt sted, hvilket f\u0413\u0490r akslen til at b\u0413\u0451je sig, hvilket presser det p\u0413\u0490g\u0413\u00a6ldende sted h\u0413\u0490rdere mod t\u0413\u00a6tningen, hvilket opvarmer det yderligere \u0432\u0402\u201d en selvforst\u0413\u00a6rkende cirkel (ogs\u0413\u0490 kaldet Newkirk-effekten), der p\u0413\u0490 f\u0413\u0490 minutter kan forvandle en mindre kontakt til kraftige vibrationer.<\/p>\n<h2>4. Symptomer og diagnosticering<\/h2>\n<h3>4.1 Vibrationsegenskaber<\/h3>\n<p>Termisk b\u0413\u0451jning giver et karakteristisk s\u0413\u00a6t symptomer:<\/p>\n<ul>\n<li><strong>Frekvens:<\/strong> 1\u00d7 l\u00f8behastighed \u2014 klassisk <a href=\"https:\/\/vibromera.eu\/da\/glossary\/synchronous-vibration\/\">synkron vibration<\/a>.<\/li>\n<li><strong>Tidspunkt:<\/strong> h\u00f8j under opvarmningen, men falder, n\u00e5r den termiske ligev\u00e6gt er n\u00e5et.<\/li>\n<li><strong>Phase changes:<\/strong> den <a href=\"https:\/\/vibromera.eu\/da\/glossary\/phase-angle\/\">fasevinkel<\/a> forandrer sig, efterh\u00e5nden som sp\u00e6ndingen opbygges og derefter l\u00f8ses.<\/li>\n<li><strong>Vibration ved langsom rotation:<\/strong> st\u00e6rke vibrationer selv ved meget lav hastighed, i mods\u00e6tning til <a href=\"https:\/\/vibromera.eu\/da\/glossary\/unbalance\/\">ubalance<\/a>.<\/li>\n<li><strong>Udseende:<\/strong> Det ligner en ubalance, men det afh\u00e6nger af temperaturen.<\/li>\n<\/ul>\n<h3>4.2 Skelnen mellem termisk b\u00f8jning og ubalance<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Karakteristisk<\/th>\n<th>Ubalance<\/th>\n<th>Termisk b\u00f8jning<\/th>\n<\/tr>\n<tr>\n<td>Frekvens<\/td>\n<td>1\u00d7 omdrejningshastighed<\/td>\n<td>1\u00d7 omdrejningshastighed<\/td>\n<\/tr>\n<tr>\n<td>Temperaturf\u00f8lsomhed<\/td>\n<td>Relativt stabil<\/td>\n<td>H\u00f8j under opvarmning\/nedk\u00f8ling<\/td>\n<\/tr>\n<tr>\n<td>Langsom rotation (50\u0432\u0402\u201c200 omdr.\/min.)<\/td>\n<td>Meget lav amplitude<\/td>\n<td>H\u00f8j amplitude<\/td>\n<\/tr>\n<tr>\n<td>Fase vs. Temperatur<\/td>\n<td>Konstant<\/td>\n<td>\u00c6ndringer efterh\u00e5nden som buen udvikler sig<\/td>\n<\/tr>\n<tr>\n<td>Udholdenhed<\/td>\n<td>Konstant til enhver tid<\/td>\n<td>Midlertidig, opl\u00f8ses ved termisk ligev\u00e6gt<\/td>\n<\/tr>\n<tr>\n<td>Respons p\u00e5 afbalancering<\/td>\n<td>Reduceret vibration<\/td>\n<td>Minimal eller ingen forbedring<\/td>\n<\/tr>\n<\/table>\n<p>N\u00e5r man plotter amplitude og fase mod tiden \u2014 eller mod lejetemperaturen \u2014 bliver disse tabelr\u00e6kker til et utvetydigt billede: En vektor, der svinger, n\u00e5r rotoren varmes op og derefter stabiliserer sig, er termisk b\u00f8jning, mens en vektor, der forbliver ubev\u00e6gelig, er ubalance. A <a href=\"https:\/\/vibromera.eu\/da\/glossary\/polar-plot\/\">polardiagram<\/a> fanget under <a href=\"https:\/\/vibromera.eu\/da\/glossary\/startup-vibration\/\">opstart<\/a> giver et overblik over denne migration.<\/p>\n<h3>4.3 Diagnostiske unders\u00f8gelser<\/h3>\n<h4>4.3.1 Vibrationstest ved langsom rullning<\/h4>\n<ul>\n<li>Drej akslen med 5\u201310 % af driftshastigheden.<\/li>\n<li>M\u00e5l vibrationer og <a href=\"https:\/\/vibromera.eu\/da\/glossary\/run-out\/\">udl\u00f8b<\/a>.<\/li>\n<li>St\u00e6rke, langsomt svingende vibrationer tyder p\u00e5 termisk eller mekanisk b\u00f8jning, ikke ubalance, da ubalancens p\u00e5virkning er ubetydelig ved s\u00e5 lav hastighed.<\/li>\n<\/ul>\n<h4>4.3.2 Temperaturoverv\u00e5gning<\/h4>\n<ul>\n<li>Overv\u00e5g temperaturerne i akslen eller lejerne under opstart, helst med et s\u00e6rligt <a href=\"https:\/\/vibromera.eu\/da\/glossary\/temperature-sensor\/\">temperaturf\u00f8ler<\/a> p\u00e5 flere steder.<\/li>\n<li>M\u00e5l temperaturen flere steder langs lejets omkreds<\/li>\n<li>Sammenhold \u00e6ndringer i vibrationerne med de m\u00e5lte temperaturgradienter.<\/li>\n<\/ul>\n<h4>4.3.3 Tendenser i opstartsvibrationer<\/h4>\n<ul>\n<li>Plot vibrationsamplituden over tid under opvarmningen.<\/li>\n<li>Termisk kurve: h\u00f8j i starten, derefter faldende i takt med at ligev\u00e6gten n\u00e6rmer sig.<\/li>\n<li>Ubalance: stiger med hastigheden og er uafh\u00e6ngig af temperaturen.<\/li>\n<\/ul>\n<h2>5. Forebyggelsesstrategier<\/h2>\n<h3>5.1 Driftsprocedurer<\/h3>\n<h4>5.1.1 Korrekt opvarmning<\/h4>\n<ul>\n<li><strong>Gradvist temperaturstigning:<\/strong> Lad akslen varme op j\u00e6vnt.<\/li>\n<li><strong>Forl\u00e6nget opvarmningstid:<\/strong> Store vindm\u00f8ller kan tage 2\u20134 timer.<\/li>\n<li><strong>Temperaturoverv\u00e5gning:<\/strong> overv\u00e5ge temperaturerne p\u00e5 lejer og kabinet.<\/li>\n<li><strong>Vibrationsoverv\u00e5gning:<\/strong> Hold \u00f8je med vibrationer under opvarmningen, og vent med at \u00f8ge hastigheden, hvis de er kraftige.<\/li>\n<\/ul>\n<h4>5.1.2 Betjening af drejev\u00e6rket<\/h4>\n<ul>\n<li>Ved store vindm\u00f8ller skal drevmekanismen k\u00f8re (langsom rotation, ca. 3\u201310 omdr.\/min.) under opvarmning og nedk\u00f8ling.<\/li>\n<li>Kontinuerlig rotation forhindrer termisk vridning ved at fordele varmen j\u00e6vnt rundt om omkredsen.<\/li>\n<li>Det er almindelig praksis i branchen for dampturbiner p\u00e5 over 50 MW.<\/li>\n<li>Drejemekanismen kan k\u00f8re i 8\u201324 timer under afk\u00f8ling.<\/li>\n<\/ul>\n<h4>5.1.3 Procedurer for nedlukning<\/h4>\n<ul>\n<li><strong>Gradvist afk\u00f8ling:<\/strong> Reducer belastning og temperatur langsomt f\u00f8r nedlukning<\/li>\n<li><strong>Udvidet drejeanordning:<\/strong> S\u00f8rg for, at rotoren forts\u00e6tter med at dreje, mens den k\u00f8ler af.<\/li>\n<li><strong>Undg\u00e5 nedlukning ved h\u00f8j temperatur:<\/strong> N\u00f8dstop efterlader akslen varm og tilb\u00f8jelig til at h\u00e6nge ned<\/li>\n<\/ul>\n<h3>5.2 Designforanstaltninger<\/h3>\n<ul>\n<li><strong>Varmeisolering:<\/strong> Isoler kabinetterne for at opretholde en j\u00e6vn temperatur.<\/li>\n<li><strong>Varmejakker:<\/strong> eksterne varmeapparater til ensartet forvarmning.<\/li>\n<li><strong>Dr\u00e6ning:<\/strong> forhindre, at varmt kondensvand samler sig i bunden af skakten.<\/li>\n<li><strong>Ventilation:<\/strong> sikre en symmetrisk str\u00f8mning af k\u00f8leluft.<\/li>\n<\/ul>\n<h2>6. Konsekvenser af termisk b\u00f8jning<\/h2>\n<h3>6.1 Umiddelbare virkninger<\/h3>\n<ul>\n<li><strong>H\u00f8j vibration:<\/strong> kan n\u00e5 op p\u00e5 5\u201310 gange det normale niveau under opvarmningen og forst\u00e6rkes markant, hvis buen tvinger rotoren gennem en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/critical-speed\/\">kritisk hastighed<\/a>.<\/li>\n<li><strong>Lejebelastning:<\/strong> Den asymmetriske bue \u00f8ger belastningen p\u00e5 lejerne.<\/li>\n<li><strong>Seal rubs:<\/strong> Akseludb\u00f8jning kan for\u00e5rsage kontakt med t\u00e6tninger eller station\u00e6re dele<\/li>\n<li><strong>Opstartsforsinkelser:<\/strong> mandskabet skal vente, indtil vibrationerne er aftaget, f\u0413\u0451r hastigheden \u0413\u0451ges.<\/li>\n<\/ul>\n<h3>6.2 Langvarige skader<\/h3>\n<ul>\n<li><strong>Lejeslid:<\/strong> gentagne kraftige rystelser fremskynder <a href=\"https:\/\/vibromera.eu\/da\/glossary\/bearing-wear\/\">slid p\u00e5 lejer<\/a>.<\/li>\n<li><strong>Skader p\u00e5 forseglingen:<\/strong> Gentagen gnidning \u00f8del\u00e6gger t\u00e6tningsdelene.<\/li>\n<li><strong>Tr\u00e6thed:<\/strong> den cykliske b\u00f8jningssp\u00e6nding ved hver opstart bidrager til <a href=\"https:\/\/vibromera.eu\/da\/glossary\/fatigue\/\">tr\u00e6thed<\/a> i hele rotorens levetid.<\/li>\n<li><strong>Permanent set:<\/strong> Alvorlig eller gentagen termisk b\u00f8jning kan med tiden f\u00f8re til permanent plastisk deformation \u2014 og p\u00e5 det tidspunkt er en reversibel fejl blevet permanent <a href=\"https:\/\/vibromera.eu\/da\/glossary\/shaft-bow\/\">akselb\u00f8jning<\/a>.<\/li>\n<\/ul>\n<h2>7. Afhj\u00e6lpning og begr\u00e6nsning<\/h2>\n<h3>7.1 Ved aktiv termisk b\u0413\u0451jning<\/h3>\n<ul>\n<li><strong>Allow time:<\/strong> Vent p\u00e5 termisk ligev\u00e6gt, f\u00f8r du \u00f8ger hastigheden<\/li>\n<li><strong>Langsom rulning:<\/strong> Drej langsomt for at fordele varmen s\u00e5 godt som muligt.<\/li>\n<li><strong>Fors\u00f8g ikke at afbalancere:<\/strong> <a href=\"https:\/\/vibromera.eu\/da\/glossary\/afbalancering\/\">afbalancering<\/a> kan ikke udligne termisk vridning og vil derfor v\u00e6re ineffektiv.<\/li>\n<li><strong>L\u00f8s problemet med varmekilden:<\/strong> at identificere og afhj\u00e6lpe den asymmetriske opvarmning.<\/li>\n<\/ul>\n<h3>7.2 For termisk nedb\u00f8jning af buen (efter nedlukning)<\/h3>\n<ul>\n<li><strong>Drejev\u00e6rk:<\/strong> S\u00f8rg for, at rotoren fortsat drejer langsomt under afk\u00f8lingen.<\/li>\n<li><strong>Forl\u00e6nget rulletid:<\/strong> Det kan v\u00e6re n\u00f8dvendigt at k\u00f8re drejev\u00e6rket i 12\u201324 timer.<\/li>\n<li><strong>Temperaturoverv\u00e5gning:<\/strong> Forts\u00e6t, indtil temperaturen i skaftet er ensartet.<\/li>\n<li><strong>Forsinket genstart:<\/strong> Hvis der er opst\u00e5et en bue, skal du vente p\u00e5 naturlig udretning, f\u00f8r du genoptager behandlingen.<\/li>\n<\/ul>\n<h2>8. Branchespecifikke overvejelser<\/h2>\n<h3>8.1 Damp-turbiner<\/h3>\n<ul>\n<li>De mest udsatte maskiner p\u00e5 grund af h\u00f8je temperaturer og store rotorer.<\/li>\n<li>Omhyggelige opvarmnings- og afk\u00f8lingsrutiner er standardpraksis.<\/li>\n<li>Drejev\u0413\u00a6rk er obligatorisk for anl\u0413\u00a6g p\u0413\u0490 over 50 MW.<\/li>\n<li>De kan have brug for 2\u0432\u0402\u201c4 timers opvarmning og 12\u0432\u0402\u201c24 timers afk\u0413\u0451ling p\u0413\u0490 drejev\u0413\u00a6rk.<\/li>\n<\/ul>\n<h3>8.2 Gasturbiner<\/h3>\n<ul>\n<li>Hurtigere termisk respons p\u00e5 grund af deres lavere rotormasse.<\/li>\n<li>Termisk b\u00f8jning ved opstart er mindre almindelig, men stadig mulig.<\/li>\n<li>Opvarmning p\u00e5 forbr\u00e6ndingssiden kan medf\u00f8re asymmetri i omkredsen.<\/li>\n<li>Opvarmningscyklusser er typisk hurtigere end for dampturbiner.<\/li>\n<\/ul>\n<h3>8.3 Store elektriske motorer og generatorer<\/h3>\n<ul>\n<li>Termisk b\u00f8jning kan skyldes varme fra rotorviklingen eller friktion i lejerne.<\/li>\n<li>Udend\u00f8rs installationer er udsat for solopvarmning p\u00e5 den ene side.<\/li>\n<li>Det kan v\u00e6re n\u00f8dvendigt at dreje eller opvarme maskinen inden opstart.<\/li>\n<\/ul>\n<h2>9. Overv\u00e5gning og alarmering<\/h2>\n<h3>9.1 Vigtige overv\u00e5gningsparametre<\/h3>\n<ul>\n<li><strong>Vibration ved langsom rotation:<\/strong> Foretag m\u00e5lingen ved lav hastighed inden normal opstart.<\/li>\n<li><strong>Temperaturforskel i lejet:<\/strong> Sammenlign temperaturen \u00f8verst med temperaturen nederst.<\/li>\n<li><strong>Vibrationer kontra temperatur:<\/strong> Plot amplituden mod lejetemperaturen.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/da\/glossary\/phase\/\">Fasevinkel<\/a>:<\/strong> f\u00f8lge med i de faseskift, der tyder p\u00e5, at der er en bue under opsejling.<\/li>\n<\/ul>\n<h3>9.2 Alarmkriterier<\/h3>\n<ul>\n<li>En langsom rullende vibration, der er mere end dobbelt s\u00e5 stor som basisniveauet, udl\u00f8ser en alarm.<\/li>\n<li>En temperaturforskel p\u00e5 over 15\u201320 \u00b0C tyder p\u00e5 en termisk ubalance.<\/li>\n<li>Hurtige fase\u0413\u00a6ndringer (mere end 30\u0412\u00b0 p\u0413\u0490 10 minutter) tyder p\u0413\u0490, at der er ved at opst\u0413\u0490 en b\u0413\u0451jning.<\/li>\n<li>Vibrationer stiger under opvarmning i stedet for at falde<\/li>\n<\/ul>\n<p>Disse kriterier passer naturligt ind i en bredere <a href=\"https:\/\/vibromera.eu\/da\/glossary\/condition-monitoring\/\">tilstandsoverv\u00e5gning<\/a> program, hvor data for opstart og udk\u00f8rsel registreres som <a href=\"https:\/\/vibromera.eu\/da\/glossary\/transient-vibration\/\">forbig\u00e5ende vibrationer<\/a> registreringer frem for \u00f8jebliksbilleder af en stabil tilstand.<\/p>\n<h2>10. Avancerede opstartsstrategier<\/h2>\n<h3>10.1 Kontrolleret acceleration<\/h3>\n<ol>\n<li><strong>Langsom start:<\/strong> Kontroller, at vibrationsniveauet er acceptabelt ved 100\u2013200 omdr.\/min.<\/li>\n<li><strong>Trinvis acceleration:<\/strong> G\u00e5 over til mellemhastigheder (f.eks. 30 %, 50 %, 70 % af det normale) med pauser.<\/li>\n<li><strong>Opvarmningsperioder:<\/strong> Hold en konstant hastighed i 15\u201330 minutter i hvert trin.<\/li>\n<li><strong>Kontrol af vibrationer:<\/strong> Kontroller, at vibrationsniveauet falder i hvert trin, inden du forts\u00e6tter.<\/li>\n<li><strong>Temperaturoverv\u00e5gning:<\/strong> sikre, at temperaturgradienterne mindskes overalt.<\/li>\n<\/ol>\n<h3>10.2 Automatiske opstartsystemer<\/h3>\n<p>Moderne styresystemer kan automatisere styringen af termisk b\u0413\u0451jning:<\/p>\n<ul>\n<li>Programmerbare opvarmningssekvenser.<\/li>\n<li>Automatiske holdeperioder, hvis vibrations- eller temperaturgr\u00e6nser overskrides<\/li>\n<li>Beregning i realtid af b\u00f8jningens st\u00f8rrelse ud fra vibrationer og temperatur.<\/li>\n<li>Adaptive hastighedsprofiler baseret p\u00e5 m\u00e5lte forhold<\/li>\n<\/ul>\n<h2>11. Forholdet til andre f\u00e6nomener<\/h2>\n<h3>11.1 Termisk b\u00f8jning kontra permanent b\u00f8jning<\/h3>\n<ul>\n<li><strong>Termisk b\u00f8jning:<\/strong> midlertidig, forsvinder ved termisk ligev\u00e6gt.<\/li>\n<li><strong>Permanent krumning:<\/strong> plastisk deformation, der forbliver, selv n\u00e5r skaftet er koldt.<\/li>\n<li><strong>Risiko:<\/strong> Alvorlig, gentagen termisk b\u0413\u0451jning kan med tiden f\u0413\u0451re til varig deformation.<\/li>\n<\/ul>\n<h3>11.2 Termisk b\u00f8jning og afbalancering<\/h3>\n<ul>\n<li>Fors\u00f8ger at <a href=\"https:\/\/vibromera.eu\/da\/glossary\/afbalancering\/\">balancering<\/a> Det er nyttel\u00f8st at fors\u00f8ge at rette en rotor ud, mens den er termisk b\u00f8jet.<\/li>\n<li>De korrektionsv\u0413\u00a6gte, der er beregnet for den b\u0413\u0451jede tilstand, vil v\u0413\u00a6re forkerte, n\u0413\u0490r ligev\u0413\u00a6gten er n\u0413\u0490et.<\/li>\n<li>S\u0413\u0451rg altid for termisk stabilisering f\u0413\u0451r afbalancering.<\/li>\n<li>En termisk krumning kan ogs\u00e5 skjule en reel underliggende ubalance.<\/li>\n<\/ul>\n<p>Det er netop derfor, at feltbalanceringen skal vente, indtil der er opn\u00e5et en stabil termisk tilstand. N\u00e5r rotoren har n\u00e5et sin endelige hastighed, og en langsom rundl\u00f8bsm\u00e5ling bekr\u00e6fter, at den k\u00f8rer j\u00e6vnt, kan man bruge en b\u00e6rbar tokanalsanalysator som f.eks. <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> kan m\u00e5le 1\u00d7 amplituden og <a href=\"https:\/\/vibromera.eu\/da\/glossary\/phase\/\">fase<\/a>, beregn <a href=\"https:\/\/vibromera.eu\/da\/glossary\/influence-coefficient\/\">indflydelseskoefficienter<\/a>, og kontroll\u00e9r det endelige <a href=\"https:\/\/vibromera.eu\/da\/glossary\/residual-unbalance\/\">resterende ubalance<\/a> against an <a href=\"https:\/\/vibromera.eu\/da\/glossary\/iso-21940-11\/\">ISO 21940-11<\/a> kvalitetsgrad \u0432\u0402\u201d og dermed indfange den reelle balancetilstand ved driftstemperatur, som en kold afbalanceringsmaskine aldrig ser. Den tilladte restvibration for opgaven kan beregnes p\u0413\u0490 forh\u0413\u0490nd ved hj\u0413\u00a6lp af <a href=\"https:\/\/vibromera.eu\/da\/calculators\/residual-unbalance-iso1940\/\">Beregner for restubalance (ISO 21940-11)<\/a>.<\/p>\n<h2>12. Bedste praksis inden for forebyggelse<\/h2>\n<h3>12.1 Ved nye installationer<\/h3>\n<ul>\n<li>Design symmetriske varme- og k\u00f8lesystemer.<\/li>\n<li>Der skal monteres drejeanordning p\u00e5 udstyr med en effekt p\u00e5 over 100 kW eller med en aksel, der er l\u00e6ngere end 2 meter.<\/li>\n<li>S\u00f8rg for tilstr\u00e6kkelig dr\u00e6ning for at forhindre ophobning af varm v\u00e6ske<\/li>\n<li>Isoler for at minimere varmeoverf\u00f8rslen via str\u00e5ling.<\/li>\n<\/ul>\n<h3>12.2 For eksisterende udstyr<\/h3>\n<ul>\n<li>Udvikle og f\u00f8lg n\u00f8je skriftlige opvarmningsprocedurer<\/li>\n<li>Undervis operat\u0413\u0451rerne i risici og symptomer forbundet med termisk b\u0413\u0451jning.<\/li>\n<li>Installer temperaturoverv\u00e5gning flere steder.<\/li>\n<li>Brug vibrationstendenser under opstart til at opdage termiske problemer.<\/li>\n<li>Dokument\u00e9r historiske data for l\u00f8bende at forbedre procedurerne.<\/li>\n<\/ul>\n<h3>12.3 Vedligeholdelsesprocedurer<\/h3>\n<ul>\n<li>Kontroller drejemekanismens funktion f\u00f8r hver nedlukning<\/li>\n<li>Kontroller kalibreringen af lejetemperaturf\u00f8lerne.<\/li>\n<li>Kontroller afl\u00f8bssystemerne for tilstopninger.<\/li>\n<li>Kontroller, at isoleringen er intakt.<\/li>\n<li>Find og fjern alle \u00e5rsager til uj\u00e6vn opvarmning.<\/li>\n<\/ul>\n<p>Termisk b\u00f8jning er, selvom den er midlertidig og reversibel, en v\u00e6sentlig driftsm\u00e6ssig udfordring for store roterende maskiner. At forst\u00e5 \u00e5rsagerne, genkende symptomerne og f\u00f8lge de korrekte procedurer for opvarmning og afk\u00f8ling er afg\u00f8rende for en p\u00e5lidelig drift af dampturbiner, gasturbiner og andet roterende udstyr, der arbejder ved h\u00f8je temperaturer \u2014 og for i situationen at kunne skelne mellem en rotor, der blot har brug for tid til at falde til ro, og en, der reelt skal afbalanceres.<\/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 termisk b\u00f8jning, en midlertidig akselkrumning for\u00e5rsaget af uj\u00e6vn opvarmning, der producerer vibrationssymptomer under opvarmning, hvilket er almindeligt i store turbiner og motorer.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-268","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/268","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":1,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/268\/revisions"}],"predecessor-version":[{"id":101463,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/268\/revisions\/101463"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}