{"id":52,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/bearing-span\/"},"modified":"2026-07-03T09:51:01","modified_gmt":"2026-07-03T09:51:01","slug":"bearing-span","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/bearing-span\/","title":{"rendered":"Hvad er lejesp\u00e6ndvidde i rotordynamik?"},"content":{"rendered":"<h1>Forst\u00e5else af lejesp\u00e6ndvidde i rotordynamik<\/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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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\/52?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>Lejesp\u00e6ndvidde<\/strong> \u2014 ogs\u00e5 kaldet lejeafstand eller st\u00f8tteafstand \u2014 er afstanden fra midte til midte mellem de to hovedst\u00f8ttelejer p\u00e5 en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor\/\">Rotor<\/a>. Selvom det lyder simpelt, er netop denne dimension en af de mest afg\u00f8rende faktorer i hele <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-dynamics\/\">rotordynamik<\/a>, fordi den bestemmer akselens b\u00f8jning <a href=\"https:\/\/vibromera.eu\/da\/glossary\/stiffness\/\">stivhed<\/a>, og stivheden p\u00e5virker igen <a href=\"https:\/\/vibromera.eu\/da\/glossary\/critical-speed\/\">kritiske hastigheder<\/a>, de maksimale afb\u00f8jninger, de belastninger, lejerne uds\u00e6ttes for, samt rotorens samlede dynamiske egenskaber. Ved en given akseldiameter og et givet materiale g\u00f8r en forl\u00e6ngelse af akselafstanden akslen mere fleksibel og s\u00e6nker dens kritiske hastigheder; en forkortelse g\u00f8r akslen stivere og h\u00e6ver dem. Denne l\u00f8ftestangseffekt \u2013 en stor virkning af en beskeden geometrisk \u00e6ndring \u2013 er netop det, der g\u00f8r akselafstanden til et centralt designvalg frem for en eftertanke.<\/p>\n<h2>1. Definition og grundl\u00e6ggende principper<\/h2>\n<p>Mellem sine to underst\u00f8tninger opf\u00f8rer en aksel sig som en fritst\u00f8ttet bj\u00e6lke, og de samme mekaniske principper, der g\u00e6lder for enhver bj\u00e6lke, g\u00e6lder ogs\u00e5 for rotoren. Sp\u00e6ndvidden er bj\u00e6lkens l\u00e6ngde, og da bj\u00e6lkens nedb\u00f8jning er proportional med l\u00e6ngdens tredje potens, er rotorens fleksibilitet yderst f\u00f8lsom over for lejets placering. Alt, hvad der f\u00f8lger \u2013 kritiske hastigheder, afb\u00f8jningsgr\u00e6nser, leje belastninger \u2013 f\u00f8lger af dette kubiske forhold, s\u00e5 det er v\u00e6rd at fastl\u00e6gge det omhyggeligt, f\u00f8r der drages konklusioner om designet.<\/p>\n<h2>2. Indvirkning p\u00e5 rotorens stivhed<\/h2>\n<h3>Forholdet i bj\u00e6lkemekanikken<\/h3>\n<p>Stivheden i akslen mellem lejerne f\u00f8lger den grundl\u00e6ggende bj\u00e6lkeligning:<\/p>\n<blockquote><p><strong>Nedb\u00f8jning \u221d L\u00b3 \/ (E \u00d7 I)<\/strong><\/p><\/blockquote>\n<ul>\n<li><strong>L<\/strong> = sp\u00e6ndvidde (l\u00e6ngde).<\/li>\n<li><strong>E<\/strong> = materialets elasticitetsmodul.<\/li>\n<li><strong>I<\/strong> = akselens arealtr\u00e6ghedsmoment, som i sig selv er proportionalt med diameteren i fjerde potens.<\/li>\n<li><strong>Vigtig indsigt:<\/strong> afb\u00f8jningen \u2014 og dermed fleksibiliteten \u2014 stiger med <em>terning<\/em> of the span.<\/li>\n<\/ul>\n<h3>Praktiske konsekvenser<\/h3>\n<ul>\n<li>En fordobling af lejesp\u00e6ndvidden \u00f8ger nedb\u00f8jningen otte gange (2\u00b3 = 8).<\/li>\n<li>En reduktion af sp\u00e6ndvidden med 25 % mindsker nedb\u00f8jningen med ca. 58 %.<\/li>\n<li>Selv sm\u00e5 \u00e6ndringer i lejets placering kan have stor indflydelse p\u00e5 stivheden.<\/li>\n<li>For lange rotorer har sp\u00e6ndvidden st\u00f8rre indflydelse end akseldiameteren \u2014 men da I er proportional med diameteren i fjerde potens, er diameteren den faktor, der har st\u00f8rst indflydelse, n\u00e5r begge st\u00f8rrelser kan \u00e6ndres.<\/li>\n<\/ul>\n<h2>3. Indvirkning p\u00e5 kritiske hastigheder<\/h2>\n<h3>Det grundl\u00e6ggende forhold<\/h3>\n<p>For en simpel rotor \u2014 en ensartet aksel med en koncentreret masse i midten \u2014 er den f\u00f8rste <a href=\"https:\/\/vibromera.eu\/da\/glossary\/natural-frequency\/\">naturlig frekvens<\/a> er omtrent:<\/p>\n<ul>\n<li><strong>f \u221d \u221a(k\/m)<\/strong>, hvor k er akselstivheden og m er rotormassen.<\/li>\n<li>Da stivheden er proportional med 1\/L\u00b3, f\u00f8lger det heraf, at <strong>f \u221d 1\/L<sup>3\/2<\/sup><\/strong>.<\/li>\n<li><strong>Praktisk regel:<\/strong> den f\u00f8rste kritiske hastighed er omvendt proportional med lejesp\u00e6ndvidden opl\u00f8ftet til potensen 1,5.<\/li>\n<\/ul>\n<h3>Konsekvenser for designet<\/h3>\n<ul>\n<li><strong>Shorter span:<\/strong> h\u00f8jere kritiske hastigheder, en stivere rotor, der er bedre egnet til drift ved h\u00f8je hastigheder.<\/li>\n<li><strong>Longer span:<\/strong> lavere kritiske hastigheder, en mere fleksibel rotor, der muligvis skal k\u00f8re som en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/flexible-rotor\/\">fleksibel rotor<\/a>.<\/li>\n<li><strong>Optimisation:<\/strong> en afvejning mellem tilg\u00e6ngelighed (en l\u00e6ngere sp\u00e6ndvidde g\u00f8r monteringen nemmere) og stivhed (en kortere sp\u00e6ndvidde giver bedre dynamiske egenskaber).<\/li>\n<\/ul>\n<h3>Regneeksempel<\/h3>\n<p>Tag en motorrotor med en f\u00f8rste kritiske hastighed p\u00e5 3000 o\/min ved en lejesp\u00e6ndvidde p\u00e5 500 mm:<\/p>\n<ul>\n<li>For\u00f8g sp\u00e6ndvidden til 600 mm (en for\u00f8gelse p\u00e5 20 %).<\/li>\n<li>Den kritiske hastighed falder til 3000 \/ (600\/500)<sup>1.5<\/sup> \u2248 2280 RPM.<\/li>\n<li>Det fald p\u00e5 24% kan flytte den kritiske hastighed faretruende t\u00e6t p\u00e5 driftshastigheden \u2014 pr\u00e6cis den type forskydning, det er v\u00e6rd at kontrollere mod k\u00f8rehastigheden med en <a href=\"https:\/\/vibromera.eu\/da\/calculators\/rotor-critical-speed\/\">Kritisk hastighedsberegner for rotor<\/a>.<\/li>\n<\/ul>\n<h2>4. Designm\u00e6ssige overvejelser<\/h2>\n<p>N\u00e5r man placerer lejer, skal man forene flere modstridende krav p\u00e5 \u00e9n gang.<\/p>\n<h3>Mekaniske begr\u00e6nsninger<\/h3>\n<ul>\n<li>Dimensioner p\u00e5 maskinramme og kabinet.<\/li>\n<li>Placeringen af rotorkomponenter s\u00e5som skovlhjul og koblinger.<\/li>\n<li>Adgang til vedligeholdelse og montering.<\/li>\n<li>Krav til kobling og drivsystem.<\/li>\n<\/ul>\n<h3>Krav til rotordynamik<\/h3>\n<ul>\n<li><strong>Adskillelse ved kritisk hastighed:<\/strong> Placer lejerne, s\u00e5 de kritiske hastigheder ligger \u00b120\u201330 % fra driftshastigheden.<\/li>\n<li><strong>Stiv kontra fleksibel:<\/strong> En kortere sp\u00e6ndvidde holder rotoren <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rigid-rotor\/\">stiv<\/a>; en l\u00e6ngere sp\u00e6ndvidde kan medf\u00f8re, at den fungerer som en fleksibel rotor.<\/li>\n<li><strong>Afb\u00f8jningsgr\u00e6nser:<\/strong> hold den maksimale nedb\u00f8jning under det punkt, hvor den for\u00e5rsager gnidning eller skader p\u00e5 t\u00e6tninger.<\/li>\n<li><strong>Lejebelastninger:<\/strong> St\u00f8rre sp\u00e6ndvidder mindsker de statiske belastninger ved en given rotorv\u00e6gt.<\/li>\n<\/ul>\n<h3>Produktion og samling<\/h3>\n<ul>\n<li>St\u00f8rre sp\u00e6ndvidder giver mere plads til afbalancering og montering.<\/li>\n<li>Det er nemmere at justere lejerne, n\u00e5r sp\u00e6ndvidden er fri og synlig.<\/li>\n<li>Kortere sp\u00e6ndvidder er mere kompakte og kr\u00e6ver mindre materialer til konstruktionen.<\/li>\n<\/ul>\n<h2>5. Indvirkning p\u00e5 lejebelastninger<\/h2>\n<h3>Statisk belastningsfordeling<\/h3>\n<p>Lejesp\u00e6ndvidden bestemmer, hvordan rotorens v\u00e6gt og kr\u00e6fter fordeles mellem de to underst\u00f8tninger:<\/p>\n<ul>\n<li><strong>Longer span:<\/strong> lavere lejebelastninger for den samme rotorv\u00e6gt takket v\u00e6re den l\u00e6ngere momentarm.<\/li>\n<li><strong>Shorter span:<\/strong> st\u00f8rre belastning pr. enhed, men en mere j\u00e6vn fordeling.<\/li>\n<li><strong>Overh\u00e6ngende belastninger:<\/strong> virkningen af en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/overhung-rotor\/\">udh\u00e6ngende komponent<\/a> forst\u00e6rkes i takt med, at sp\u00e6ndvidden \u00f8ges.<\/li>\n<\/ul>\n<h3>Dynamiske belastninger som f\u00f8lge af ubalance<\/h3>\n<ul>\n<li>Dynamiske lejebelastninger fra <a href=\"https:\/\/vibromera.eu\/da\/glossary\/unbalance\/\">ubalance<\/a> afh\u00e6nger af afb\u00f8jningen.<\/li>\n<li>En st\u00f8rre sp\u00e6ndvidde giver mulighed for st\u00f8rre nedb\u00f8jning, hvilket kan reducere den overf\u00f8rte lejebelastning.<\/li>\n<li>Men netop denne afb\u00f8jning \u00f8ger svingningsamplituden.<\/li>\n<li>Designeren afvejer derfor lejets levetid mod vibrationsniveauet \u2014 en balance, som god <a href=\"https:\/\/vibromera.eu\/da\/glossary\/afbalancering\/\">afbalancering<\/a> fordeler sig til alles fordel ved at reducere selve excitationen.<\/li>\n<\/ul>\n<h2>6. Forholdet til akseldiameteren<\/h2>\n<p>Sp\u00e6ndvidden v\u00e6lges aldrig isoleret; den skal vurderes i sammenh\u00e6ng med akseldiameteren.<\/p>\n<h3>Forholdet mellem l\u00e6ngde og diameter (L\/D)<\/h3>\n<ul>\n<li><strong>L\/D &lt; 5:<\/strong> meget stiv, hvor opf\u00f8rsel som en stiv rotor er normen.<\/li>\n<li><strong>5 &lt; L\/D &lt; 20:<\/strong> moderat fleksibilitet, der d\u00e6kker de fleste industrielle maskiner.<\/li>\n<li><strong>L\/D &gt; 20:<\/strong> meget fleksibel, hvor det er afg\u00f8rende at tage h\u00f8jde for fleksible rotorer.<\/li>\n<\/ul>\n<h3>Optimeringsstrategi<\/h3>\n<ul>\n<li><strong>Fixed span:<\/strong> \u00f8ge diameteren for at h\u00e6ve de kritiske hastigheder.<\/li>\n<li><strong>Fast diameter:<\/strong> Reducer sp\u00e6ndvidden for at h\u00e6ve dem.<\/li>\n<li><strong>Kombineret optimering:<\/strong> indstille begge dele, s\u00e5 de samtidig opfylder kravene til kritisk hastighed og afb\u00f8jning.<\/li>\n<li><strong>Praktisk gr\u00e6nse:<\/strong> Pladsbegr\u00e6nsninger betyder normalt, at den ene parameter fastl\u00e6gges, mens den anden forbliver den eneste frie variabel.<\/li>\n<\/ul>\n<h2>7. Konfigurationer med flere lejer<\/h2>\n<h3>Standardst\u00f8tte med to lejer<\/h3>\n<ul>\n<li>Den mest almindelige l\u00f8sning.<\/li>\n<li>Systemet best\u00e5r af en enkelt sp\u00e6ndvidde.<\/li>\n<li>Analyse og design er ligetil.<\/li>\n<\/ul>\n<h3>Systemer med flere lejer<\/h3>\n<p>Rotorer med mere end to lejer har mere end \u00e9n sp\u00e6ndvidde at tage h\u00f8jde for:<\/p>\n<ul>\n<li><strong>Tre lejer:<\/strong> to sp\u00e6ndvidder \u2014 for eksempel en motor med et ekstra midterleje.<\/li>\n<li><strong>Fire eller flere:<\/strong> flere sp\u00e6ndvidder, der kr\u00e6ver en mere kompleks analyse.<\/li>\n<li><strong>Effektiv sp\u00e6ndvidde:<\/strong> til vibrationsarbejde, hver <a href=\"https:\/\/vibromera.eu\/da\/glossary\/mode-shape\/\">tilstandsform<\/a> kan have sin egen effektive sp\u00e6ndvidde.<\/li>\n<li><strong>Koblet dynamik:<\/strong> Sp\u00e6ndvidderne p\u00e5virker hinanden og bestemmer systemets samlede adf\u00e6rd.<\/li>\n<\/ul>\n<h2>8. M\u00e5ling, verifikation og eftermontering<\/h2>\n<h3>Kontrol af faktisk udf\u00f8relse<\/h3>\n<ul>\n<li>M\u00e5l den faktiske lejesp\u00e6ndvidde under monteringen.<\/li>\n<li>Kontroller, at det stemmer overens med designspecifikationen, typisk med en afvigelse p\u00e5 \u00b15 mm.<\/li>\n<li>Not\u00e9r de faktiske m\u00e5l til beregningerne af rotorens dynamik.<\/li>\n<li>Kontroller, at lejets midterlinjer er p\u00e5 linje.<\/li>\n<\/ul>\n<h3>Indvirkning af forskelle i installationen<\/h3>\n<ul>\n<li>Fejl i lejeplaceringen medf\u00f8rer \u00e6ndringer i de beregnede kritiske hastigheder.<\/li>\n<li>Forkert justering medf\u00f8rer ekstra belastninger.<\/li>\n<li>Fundamentets s\u00e6tning kan med tiden \u00e6ndre den effektive sp\u00e6ndvidde.<\/li>\n<li>Termisk udvidelse kan \u00e6ndre den effektive sp\u00e6ndvidde ved driftstemperatur.<\/li>\n<\/ul>\n<h3>Hvorn\u00e5r lejesp\u00e6ndvidden skal \u00e6ndres<\/h3>\n<p>Man overvejer at omplacere et leje, n\u00e5r:<\/p>\n<ul>\n<li>Maskinen k\u00f8rer for t\u00e6t p\u00e5 en kritisk hastighed.<\/li>\n<li>Overdreven akseludb\u00f8jning for\u00e5rsager gnidninger eller t\u00e6tningsproblemer<\/li>\n<li>Belastningen p\u00e5 lejerne er for stor eller fordelt uj\u00e6vnt.<\/li>\n<li>Konstruktionen skifter mellem drift med stiv og fleksibel rotor.<\/li>\n<\/ul>\n<h3>Udfordringer ved \u00e6ndring af sp\u00e6ndvidde<\/h3>\n<ul>\n<li><strong>Strukturelle \u00e6ndringer:<\/strong> Det kan v\u00e6re n\u00f8dvendigt at foretage \u00e6ndringer af rammen eller kabinettet.<\/li>\n<li><strong>Indvirkning p\u00e5 justeringen:<\/strong> Flytning af et leje p\u00e5virker indstillingen i forhold til det udstyr, der drives.<\/li>\n<li><strong>Omkostninger:<\/strong> Omkostningerne ved en v\u00e6sentlig \u00e6ndring skal st\u00e5 i rimeligt forhold til fordelene.<\/li>\n<li><strong>Validering:<\/strong> der skal testes for at bekr\u00e6fte forbedringen \u2014 herunder en ny kontrol af restvibrationen <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a> efter \u00e6ndringen. En b\u00e6rbar analysator som <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> g\u00f8r denne godkendelse enkel, idet man p\u00e5 stedet registrerer lejevibrationer og opf\u00f8rslen ved kritisk hastighed, s\u00e5 eftermonteringen kan godkendes p\u00e5 baggrund af m\u00e5ledata frem for udelukkende prognoser.<\/li>\n<\/ul>\n<p>Lejesp\u00e6ndvidden er en grundl\u00e6ggende geometrisk parameter, der i h\u00f8j grad p\u00e5virker rotorens dynamiske adf\u00e6rd. Det er afg\u00f8rende at v\u00e6lge den rigtigt i konstruktionsfasen og kontrollere den n\u00f8je under monteringen for at opn\u00e5 den n\u00f8dvendige afstand til kritisk hastighed, acceptable vibrationsniveauer og p\u00e5lidelig drift p\u00e5 lang sigt, som enhver roterende maskine er afh\u00e6ngig af.<\/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 lejesp\u00e6ndvidde, afstanden mellem rotorst\u00f8ttelejer, der kritisk p\u00e5virker akselstivhed, kritiske hastigheder og afb\u00f8jningsegenskaber i roterende maskineri.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-52","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/52","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/52\/revisions"}],"predecessor-version":[{"id":102151,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/52\/revisions\/102151"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}