{"id":255,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/steam-whirl\/"},"modified":"2026-05-23T22:54:27","modified_gmt":"2026-05-23T22:54:27","slug":"steam-whirl","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/steam-whirl\/","title":{"rendered":"Hvad er damphvirvel? Aerodynamisk ustabilitet i turbiner"},"content":{"rendered":"<h1>Forst\u00e5else af damphvirvel i turbomaskiner<\/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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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\/255?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>Damphvirvel<\/strong> \u2014 ogs\u00e5 kaldet aerodynamisk krydskoblingsinstabilitet eller t\u00e6tningshvirvel \u2014 er en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/self-excited-vibration\/\">selvexciterede vibrationer<\/a> der opst\u00e5r i damp- og gasturbiner, n\u00e5r aerodynamiske kr\u00e6fter inde i labyrintt\u00e6tninger, skovlspidsspillerum eller andre ringformede passager genererer en destabiliserende tangentialkraft p\u00e5 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor\/\">Rotor<\/a>. Ligesom <a href=\"https:\/\/vibromera.eu\/da\/glossary\/oil-whirl\/\">oliehvirvel<\/a> i hydrodynamiske lejer er det en form for <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-instability\/\">rotorinstabilitet<\/a> hvor energi l\u00f8bende tr\u00e6kkes fra den j\u00e6vne str\u00f8m af damp eller gas og omdannes til orbital bev\u00e6gelse af akslen. Resultatet er h\u00f8j amplitude <a href=\"https:\/\/vibromera.eu\/da\/glossary\/sub-synchronous\/\">subsynkron<\/a> <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a> ved en frekvens t\u00e6t p\u00e5 en af rotorens <a href=\"https:\/\/vibromera.eu\/da\/glossary\/natural-frequency\/\">naturlige frekvenser<\/a> \u2014 og hvis det ikke opdages og afhj\u00e6lpes hurtigt, kan det drive en maskine mod katastrofalt havari.<\/p>\n<h2>1. Fysisk mekanisme<\/h2>\n<p>Dampvirvel er grundl\u00e6ggende en fluid-struktur-interaktion i de smalle spalter i turbinet\u00e6tninger. Den udvikler sig i tre sammenh\u00e6ngende stadier.<\/p>\n<h3>Labyrinth-t\u00e6tnings-spalter<\/h3>\n<ul>\n<li>Damp eller gas str\u00f8mmer gennem smalle ringformede passager mellem roterende og station\u00e6re t\u00e6tningskomponenter<\/li>\n<li>En h\u00f8j trykforskel virker hen over t\u00e6tningerne \u2014 ofte 50\u2013200 bar i store maskiner.<\/li>\n<li>De radiale spalter er sn\u00e6vre, typisk 0,2\u20130,5 mm.<\/li>\n<li>Str\u00f8mmen f\u00e5r en hvirvel, en tangentiel hastighedskomponent, n\u00e5r den passerer gennem t\u00e6tningst\u00e6nderne.<\/li>\n<\/ul>\n<h3>Aerodynamisk krydskobling<\/h3>\n<p>Ustabiliteten opst\u00e5r i det \u00f8jeblik, rotoren forskydes fra sin centrerede position:<\/p>\n<ul>\n<li>Spalten bliver asymmetrisk \u2014 mindre p\u00e5 den ene side, st\u00f8rre p\u00e5 den modsatte side.<\/li>\n<li>Str\u00f8mnings- og trykfordelingen omkring t\u00e6tningen bliver uensartet.<\/li>\n<li>Den resulterende aerodynamiske kraft f\u00e5r en <em>tangential<\/em> komponent, der virker vinkelret p\u00e5 forskydningen i stedet for at modvirke den.<\/li>\n<li>Den tangentielle kraft opf\u00f8rer sig som en destabiliserende &#8220;negativ <a href=\"https:\/\/vibromera.eu\/da\/glossary\/stiffness\/\">stivhed<\/a>&#8220;, der skubber rotoren langs sin bane i stedet for tilbage mod centrum.<\/li>\n<\/ul>\n<h3>Selvophidsede vibrationer<\/h3>\n<ul>\n<li>Den tangentielle kraft driver rotoren ind i en fremadrettet <a href=\"https:\/\/vibromera.eu\/da\/glossary\/whirl\/\">hvirvel<\/a> orbit.<\/li>\n<li>Banefrekvensen l\u00e6gger sig n\u00e6r en egenfrekvens, deraf sub-synkron.<\/li>\n<li>Energi udtr\u00e6kkes l\u00f8bende fra dampstr\u00f8mmen for at opretholde bev\u00e6gelsen.<\/li>\n<li>Amplituden vokser, indtil den begr\u00e6nses af den tilg\u00e6ngelige spalte \u2014 eller af havari af maskinen.<\/li>\n<\/ul>\n<h2>2. Betingelser, der fremmer dampturbinhvirving<\/h2>\n<p>Om en given maskine bliver ustabil afh\u00e6nger af en balance mellem destabiliserende t\u00e6tningskr\u00e6fter og den tilg\u00e6ngelige <a href=\"https:\/\/vibromera.eu\/da\/glossary\/damping\/\">d\u00e6mpning<\/a>. Tre grupper af faktorer afg\u00f8r den balance.<\/p>\n<h3>Geometriske faktorer<\/h3>\n<ul>\n<li><strong>T\u00e6tte t\u00e6tningsspalter:<\/strong> mindre spalter frembringer st\u00e6rkere aerodynamiske kr\u00e6fter.<\/li>\n<li><strong>Lange t\u00e6tningsl\u00e6ngder:<\/strong> flere t\u00e6tningst\u00e6nder eller l\u00e6ngere t\u00e6tningssektioner \u00f8ger den destabiliserende kraft.<\/li>\n<li><strong>H\u00f8j virvellingshastighed:<\/strong> str\u00f8mning, der tr\u00e6der ind i t\u00e6tningen med en stor tangentiel komponent, er s\u00e6rligt destabiliserende.<\/li>\n<li><strong>Store t\u00e6tningsdiametre:<\/strong> en st\u00f8rre radius forst\u00e6rker det moment, som den aerodynamiske kraft genererer.<\/li>\n<\/ul>\n<h3>Driftsforhold<\/h3>\n<ul>\n<li><strong>H\u00f8je trykdifferentialer:<\/strong> et st\u00f8rre trykfald over t\u00e6tningen \u00f8ger kraften.<\/li>\n<li><strong>H\u00f8j rotationshastighed:<\/strong> b\u00e5de centrifugaleffekter og hvirvelhastighed vokser med omdrejningstallet.<\/li>\n<li><strong>Lav lejed\u00e6mpning:<\/strong> utilstr\u00e6kkelig d\u00e6mpning kan ikke modvirke t\u00e6tningskr\u00e6fterne.<\/li>\n<li><strong>Lette belastningstilstande:<\/strong> lave lejebelastninger reducerer den effektive d\u00e6mpning a <a href=\"https:\/\/vibromera.eu\/da\/glossary\/journal-bearing\/\">journalleje<\/a> can provide.<\/li>\n<\/ul>\n<h3>Rotorkarakteristika<\/h3>\n<ul>\n<li><strong>Fleksible rotorer:<\/strong> -en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/flexible-rotor\/\">fleksibel rotor<\/a> l\u00f8ber over dens <a href=\"https:\/\/vibromera.eu\/da\/glossary\/critical-speed\/\">kritiske hastigheder<\/a> er mere modtagelig.<\/li>\n<li><strong>Systemer med lav d\u00e6mpning:<\/strong> minimal struktur- eller lejed\u00e6mpning efterlader intet til at absorbere energien.<\/li>\n<li><strong>H\u00f8jt l\u00e6ngde-til-diameter-forhold:<\/strong> slanke rotorer er i sig selv mere tilb\u00f8jelige til ustabilitet.<\/li>\n<\/ul>\n<h2>3. Diagnostiske karakteristika<\/h2>\n<h3>Vibrationssignatur<\/h3>\n<p>Damphvirvel efterlader et karakteristisk m\u00f8nster, som <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration-analysis\/\">Vibrationsanalyse<\/a> kan identificeres med sikkerhed:<\/p>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Parameter<\/th>\n<th>Karakteristisk<\/th>\n<\/tr>\n<tr>\n<td>Frekvens<\/td>\n<td>Sub-synkront, typisk 0,3\u20130,6\u00d7 driftshastighed, ofte l\u00e5st p\u00e5 en naturlig frekvens<\/td>\n<\/tr>\n<tr>\n<td>Amplitude<\/td>\n<td>H\u00f8j \u2014 ofte 5\u201320 gange den normale ubalancevibration<\/td>\n<\/tr>\n<tr>\n<td>Debut<\/td>\n<td>Pludseligt, over en t\u00e6rskelhastighedeller tryk<\/td>\n<\/tr>\n<tr>\n<td>Hastighedsafh\u00e6ngighed<\/td>\n<td>Frekvensen kan l\u00e5se sig fast og n\u00e6gte at f\u00f8lge omdrejnings\u00e6ndringer<\/td>\n<\/tr>\n<tr>\n<td>Kredsl\u00f8b<\/td>\n<td>Stor cirkul\u00e6r eller elliptisk, fremadrettet pr\u00e6cession<\/td>\n<\/tr>\n<tr>\n<td>Spektrum<\/td>\n<td>Dominerende subsynkron top<\/td>\n<\/tr>\n<\/table>\n<h3>Differentiering fra andre ustabiliteter<\/h3>\n<ul>\n<li><strong>vs. oliehvirvel \/ whip:<\/strong> damphvirvel forekommer i turbiner med labyrintt\u00e6tninger, mens oliehvirvel forekommer i glatte <a href=\"https:\/\/vibromera.eu\/da\/glossary\/journal-bearing\/\">glidelejer<\/a>.<\/li>\n<li><strong>vs. unbalance:<\/strong> damphvirvel er subsynkron, mens <a href=\"https:\/\/vibromera.eu\/da\/glossary\/imbalance\/\">ubalance<\/a> is a 1\u00d7 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/synchronous-vibration\/\">synchronous<\/a> response.<\/li>\n<li><strong>vs. rub:<\/strong> damphvirvel kan opst\u00e5 uden nogen kontakt, og dens frekvens er mere stabil end den uregelm\u00e6ssige vibration fra en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-rub\/\">Rotorens gnidning<\/a>.<\/li>\n<\/ul>\n<h2>4. Metoder til forebyggelse og afhj\u00e6lpning<\/h2>\n<p>De fleste modforanstaltninger angriber et af to m\u00e5l: reducere den destabiliserende hvirvel ved kilden, eller tilf\u00f8je d\u00e6mpning, s\u00e5 rotoren kan absorbere den. T\u00e6tningsdesign tager fat p\u00e5 det f\u00f8rste; lejeforbedringer og driftsgr\u00e6nser tager fat p\u00e5 det andet.<\/p>\n<h3>\u00c6ndringer i t\u00e6tningsdesign<\/h3>\n<ul>\n<li><strong>Anti-hvirvel-enheder (hvirvel-bremser):<\/strong> station\u00e6re ledeskovle eller sk\u00e6rmplader placeret opstr\u00f8ms for t\u00e6tningen fjerner den tangentielle hastighed fra den indkommende str\u00f8mning og reducerer krydskoblingskraften kraftigt. Dette er den mest effektive og mest almindelige l\u00f8sning.<\/li>\n<li><strong>Honeycomb-t\u00e6tninger:<\/strong> udskiftning af de glatte labyrintkanter med en bikagestruktur genererer turbulens, der spreder hvirvelenergien og \u00f8ger den effektive d\u00e6mpning i t\u00e6tningsomr\u00e5det; udbredt anvendt i moderne gasturbiner.<\/li>\n<li><strong>\u00d8gede t\u00e6tningsklareringer:<\/strong> st\u00f8rre radiale spillerum sv\u00e6kker den aerodynamiske kraft, men p\u00e5 bekostning af mere l\u00e6kage og reduceret turbinevirkningsgrad, s\u00e5 dette er normalt kun en midlertidig foranstaltning.<\/li>\n<li><strong>Damper seals:<\/strong> specialdesignede t\u00e6tninger \u2014 pocket damper-t\u00e6tninger og hole-pattern-t\u00e6tninger \u2014 der giver d\u00e6mpning, samtidig med at de t\u00e6tner, og tilf\u00f8rer en stabiliserende kraft til at modvirke krydskoblingen.<\/li>\n<\/ul>\n<h3>Forbedringer af lejesystemet<\/h3>\n<ul>\n<li><strong>\u00d8g lejed\u00e6mpningen:<\/strong> montere vippelejer eller tilf\u00f8je en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/squeeze-film-damper\/\">klemfilmd\u00e6mper<\/a>.<\/li>\n<li><strong>Lejeforsp\u00e6nding:<\/strong> applying <a href=\"https:\/\/vibromera.eu\/da\/glossary\/preload\/\">preload<\/a> \u00f8ger b\u00e5de den effektive stivhed og d\u00e6mpningen.<\/li>\n<li><strong>Optimeret lejedesign:<\/strong> valg af lejetype og -konfiguration for maksimal stabilitetsmargin.<\/li>\n<\/ul>\n<h3>Driftskontroller<\/h3>\n<ul>\n<li><strong>Hastighedsbegr\u00e6nsninger:<\/strong> hold driftshastigheden under instabilitetst\u00e6rsklen.<\/li>\n<li><strong>Belastningsstyring:<\/strong> undg\u00e5 drift ved let belastning, der fjerner d\u00e6mpningen fra lejerne.<\/li>\n<li><strong>Trykregulering:<\/strong> reducer trykforskelle over t\u00e6tningen, hvor processen tillader det.<\/li>\n<li><strong>Kontinuerlig overv\u00e5gning:<\/strong> real-time <a href=\"https:\/\/vibromera.eu\/da\/glossary\/condition-monitoring\/\">tilstandsoverv\u00e5gning<\/a> med dedikerede sub-synkrone alarmer.<\/li>\n<\/ul>\n<h2>5. Detektion og n\u00f8dberedskab<\/h2>\n<h3>Tidlige advarselstegn<\/h3>\n<ul>\n<li>Sm\u00e5 sub-synkrone toppe begynder at vise sig i vibrationerne <a href=\"https:\/\/vibromera.eu\/da\/glossary\/spectrum\/\">spektrum<\/a>.<\/li>\n<li>Intermitterende h\u00f8jtfrekvente komponenter.<\/li>\n<li>En gradvis stigning i det samlede <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration-severity\/\">vibrationssv\u00e6rhedsgrad<\/a> efterh\u00e5nden som hastigheden n\u00e6rmer sig t\u00e6rsklen.<\/li>\n<li>Changes in the <a href=\"https:\/\/vibromera.eu\/da\/glossary\/orbit\/\">banebev\u00e6gelse<\/a> form registreret af n\u00e6rheds-sonder.<\/li>\n<\/ul>\n<h3>\u00d8jeblikkelige handlinger n\u00e5r dampvirvel registreres<\/h3>\n<ol>\n<li><strong>Reduce speed:<\/strong> reducer straks hastigheden under t\u00e6rsklen.<\/li>\n<li><strong>Vent ikke:<\/strong> amplituden kan vokse fra acceptabel til destruktiv p\u00e5 30\u201360 sekunder.<\/li>\n<li><strong>N\u00f8dstop:<\/strong> udl\u00f8s maskinens n\u00f8dstop (trip), hvis en hastighedsreduktion er utilstr\u00e6kkelig eller umulig.<\/li>\n<li><strong>Dokument\u00e9r h\u00e6ndelsen:<\/strong> registr\u00e9r hastigheden ved indtr\u00e6den, frekvensen, spidsamplituden og driftsforholdene.<\/li>\n<li><strong>Lad v\u00e6re med at genstarte:<\/strong> hold maskinen ude af drift, indtil grund\u00e5rsagen er identificeret og udbedret.<\/li>\n<\/ol>\n<h3>Hvor feltinstrumenter h\u00f8rer til<\/h3>\n<p>Permanent installerede beskyttelsessystemer h\u00e5ndterer udkoblingen p\u00e5 et splitsekund, men en b\u00e6rbar tokanals-analysator er uvurderlig til at unders\u00f8ge instabiliteten, n\u00e5r maskinen er standset, og til idrifts\u00e6ttelseskontroller bagefter. Et instrument s\u00e5som <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> opfanger FFT-spektret for at bekr\u00e6fte den subsynkrone spids, sporer dens amplitude under en kontrolleret opstart og lader en ingeni\u00f8r f\u00f8rst udelukke et 1\u00d7 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/imbalance\/\">ubalance<\/a> problem \u2014 ved at m\u00e5le amplitude og fase ved driftshastighed \u2014 f\u00f8r vibrationen tilskrives en \u00e6gte selvexciteret t\u00e6tningsinstabilitet. At adskille en almindelig ubalance, som <a href=\"https:\/\/vibromera.eu\/da\/glossary\/feltbalancering\/\">feltafbalancering<\/a> kan udbedre, fra \u00e6gte dampvirvling, som den ikke kan, er et kritisk tidligt diagnostisk skridt.<\/p>\n<h2>6. Brancher, anvendelser og relaterede f\u00e6nomener<\/h2>\n<p>Damphvirvel er s\u00e6rligt problematisk i:<\/p>\n<ul>\n<li><strong>Elproduktion:<\/strong> store dampturbine-generatorer.<\/li>\n<li><strong>Petrokemisk:<\/strong> dampdrevne kompressorer og pumper.<\/li>\n<li><strong>Gas turbines:<\/strong> flymotorer og industrielle gasturbiner.<\/li>\n<li><strong>Processindustrier:<\/strong> enhver h\u00f8jhastighedsturbomaskine udstyret med labyrintt\u00e6tninger.<\/li>\n<\/ul>\n<p>Den indg\u00e5r ogs\u00e5 i en familie af n\u00e6rt besl\u00e6gtede instabiliteter. <a href=\"https:\/\/vibromera.eu\/da\/glossary\/oil-whirl\/\">Oliehvirvel<\/a> deler den samme destabiliserende mekanisme, men i et lejeoliefilm i stedet for en t\u00e6tning; <a href=\"https:\/\/vibromera.eu\/da\/glossary\/shaft-whip\/\">skaftpisk<\/a> udviser den samme frekvensl\u00e5sning ved en egenfrekvens; og de er alle medlemmer af den bredere kategori af selvexciterede <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-instability\/\">rotorinstabilitet<\/a>. Selvom fremskridt inden for t\u00e6tningsteknologi og lejekonstruktion har reduceret, hvor ofte den optr\u00e6der, er forst\u00e5elsen af dampvirvling fortsat afg\u00f8rende for enhver, der konstruerer eller driver h\u00f8jhastigheds-, h\u00f8jtryksturbomaskineri.<\/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 damphvirvel, en selvexciteret vibrationsinstabilitet i dampturbiner for\u00e5rsaget af aerodynamiske krydskoblingskr\u00e6fter i labyrintt\u00e6tninger og vingespidsfrigang.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-255","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/255","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\/255\/revisions"}],"predecessor-version":[{"id":101413,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/255\/revisions\/101413"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}