{"id":230,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/self-excited-vibration\/"},"modified":"2026-05-23T22:39:08","modified_gmt":"2026-05-23T22:39:08","slug":"self-excited-vibration","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/fi\/glossary\/self-excited-vibration\/","title":{"rendered":"Mit\u00e4 on itsevirittyv\u00e4 v\u00e4r\u00e4htely? \u2013 Ep\u00e4vakaat j\u00e4rjestelm\u00e4n vasteet"},"content":{"rendered":"<h1>Itseher\u00e4\u00e4v\u00e4n v\u00e4r\u00e4htelyn ymm\u00e4rt\u00e4minen<\/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\/fi\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori 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 kannettava tasapainotin ja v\u00e4r\u00e4htelyanalysaattori, t\u00e4ydellinen sarja\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori Balanset-1A\">Kannettava tasapainotin &#038; t\u00e4rin\u00e4analysaattori 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\">&euro;<\/span>1,975.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">\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:n t\u00e4rin\u00e4anturin l\u00e4hikuva\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">T\u00e4rin\u00e4anturi<\/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\">&euro;<\/span>90.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">\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=\"Optinen anturi (lasertakometri)\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">Optinen anturi (lasertakometri)<\/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\">&euro;<\/span>124.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/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-roottorin tasapainotussarja: kantolaukku, monikanavainen signaalimuunnin, k\u00e4dess\u00e4 pidett\u00e4v\u00e4 analysaattori, magneettijalusta, t\u00e4rin\u00e4anturit ja kierretyt kaapelit.\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/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\">&euro;<\/span>6,803.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta 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=\"Magneettipohja.\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta Insize-60-kgf\">Magneettinen jalusta 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\">&euro;<\/span>46.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">\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=\"Heijastava nauha\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">Heijastava nauha<\/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\">&euro;<\/span>10.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &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-pakkauksen sis\u00e4lt\u00f6, jossa on liit\u00e4nt\u00e4yksikk\u00f6, anturit, kierroslukumittari ja lis\u00e4varusteet\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &quot;Balanset-1A&quot; OEM\">Dynaaminen tasapainotin \"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\">&euro;<\/span>1,735.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/230?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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>Itsevirittyv\u00e4 v\u00e4r\u00e4htely<\/strong> - jota kutsutaan my\u00f6s itseaiheutetuksi tai ep\u00e4vakaaksi v\u00e4r\u00e4htelyksi - on erityisen vaarallinen liikkeen luokka, jossa j\u00e4rjestelm\u00e4n liike synnytt\u00e4\u00e4 juuri ne voimat, jotka yll\u00e4pit\u00e4v\u00e4t tai voimistavat liikett\u00e4. Tuloksena on suljettu takaisinkytkent\u00e4: v\u00e4r\u00e4htely luo oman liikkeellepanevan voimansa, joten amplitudi voi kasvaa, joskus katastrofaaliselle tasolle, ilman, ett\u00e4 ulkoinen her\u00e4te lis\u00e4\u00e4ntyy lainkaan. T\u00e4m\u00e4 on mekanismi, joka on useiden pel\u00e4tyimpien ep\u00e4vakauksien taustalla. <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/rotor-dynamics\/\">roottorin dynamiikka<\/a>, ja sen nopea tunnistaminen on keskeinen diagnoositaito.<\/p>\n<p>T\u00e4m\u00e4 eroaa olennaisesti <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/forced-vibration\/\">pakotettu v\u00e4r\u00e4htely<\/a> kuten <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/unbalance\/\">ep\u00e4tasapaino<\/a> tai <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/misalignment\/\">ep\u00e4kohdistus<\/a>, jossa v\u00e4r\u00e4htely on suora, suhteellinen vaste tietylle jaksolliselle sy\u00f6tteelle tunnetulla pakottavalla taajuudella. Jos ep\u00e4tasapaino kaksinkertaistuu, vaste kaksinkertaistuu; jos pakotetaajuus poistetaan, v\u00e4r\u00e4htely lakkaa. Itsevirittyv\u00e4ss\u00e4 j\u00e4rjestelm\u00e4ss\u00e4 ei ole t\u00e4llaista ulkoista kelloa \u2014 liike ruokkii itse itse\u00e4\u00e4n, ja sit\u00e4 k\u00e4ytt\u00e4v\u00e4 energia otetaan tasaisesta l\u00e4hteest\u00e4, kuten py\u00f6rimisest\u00e4, nestevirtauksesta tai leikkausprosessista.<\/p>\n<h2>1. Palautesilmukan mekanismi<\/h2>\n<p>Itsevirittyv\u00e4n v\u00e4r\u00e4htelyn mekanismi voidaan esitt\u00e4\u00e4 sekvenssin\u00e4:<\/p>\n<ol>\n<li>J\u00e4rjestelm\u00e4 - esimerkiksi laakerissaan py\u00f6riv\u00e4 roottori - on tasaisessa liikkeess\u00e4.<\/li>\n<li>Pieni, satunnainen h\u00e4iri\u00f6 aiheuttaa pienen siirtym\u00e4n tai nopeuden muutoksen.<\/li>\n<li>T\u00e4m\u00e4 liikkeen muutos muuttaa j\u00e4rjestelm\u00e4\u00e4n vaikuttavia voimia - esimerkiksi nesteen painetta j\u00e4rjestelm\u00e4ss\u00e4. <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/journal-bearing\/\">liukulaakeri<\/a> tai ty\u00f6kalun leikkausvoima.<\/li>\n<li>Kriittist\u00e4 on, ett\u00e4 muuttunut voima vaikuttaa siten, ett\u00e4 se on <em>lis\u00e4t\u00e4 energiaa<\/em> j\u00e4rjestelm\u00e4\u00e4n, mik\u00e4 ty\u00f6nt\u00e4\u00e4 komponenttia entisest\u00e4\u00e4n siihen suuntaan, johon se jo liikkui.<\/li>\n<li>Lis\u00e4\u00e4ntynyt liike synnytt\u00e4\u00e4 viel\u00e4 suuremman voiman, joka lis\u00e4\u00e4 energiaa - ja sykli toistuu.<\/li>\n<\/ol>\n<p>Silmukka ajaa amplitudia yl\u00f6sp\u00e4in, kunnes j\u00e4rjestelm\u00e4n ep\u00e4lineaarisuudet (roottori t\u00f6rm\u00e4\u00e4 kovaan pys\u00e4kkiin, tiiviste sulkee v\u00e4lyksen) tarkistavat sen tai kunnes jokin vikaantuu. Keskeinen fysikaalinen oivallus on energiatasapaino: ep\u00e4vakaus syntyy aina, kun liikkeest\u00e4 riippuvainen voima pumppaa energiaa nopeammin kuin j\u00e4rjestelm\u00e4n <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/damping\/\">vaimennus<\/a> voi hajottaa sen. Riitt\u00e4v\u00e4 vaimennus on siis ensimm\u00e4inen puolustuslinja itseviri\u00e4mist\u00e4 vastaan.<\/p>\n<h2>2. Yleisi\u00e4 esimerkkej\u00e4 itsest\u00e4\u00e4n her\u00e4tetyst\u00e4 v\u00e4r\u00e4htelyst\u00e4<\/h2>\n<p>Useat koneiden diagnostiikassa tunnetut ilmi\u00f6t ovat oppikirjatapauksia itsest\u00e4\u00e4n her\u00e4\u00e4v\u00e4st\u00e4 v\u00e4r\u00e4htelyst\u00e4:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/oil-whirl\/\">\u00d6ljypy\u00f6rre<\/a> ja \u00f6ljypeitsi:<\/strong> yleisimm\u00e4t esimerkit py\u00f6riviss\u00e4 koneissa. Nestekalvopohjaisessa liukulaakerissa py\u00f6riv\u00e4 akseli vet\u00e4\u00e4 \u00f6ljy\u00e4 kuormitusta kantavaan kiilaan. H\u00e4iri\u00f6 voi saada kiilan kiert\u00e4m\u00e4\u00e4n (py\u00f6rim\u00e4\u00e4n) laakerin ymp\u00e4rill\u00e4; py\u00f6riv\u00e4n kiilan aiheuttama paine ty\u00f6nt\u00e4\u00e4 akselia, mik\u00e4 lis\u00e4\u00e4 energiaa py\u00f6rteeseen. T\u00e4st\u00e4 aiheutuva v\u00e4r\u00e4htely ei tapahdu k\u00e4yntinopeudella vaan <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/sub-synchronous\/\">alisynkroninen<\/a> taajuus, tyypillisesti 0,42\u20130,48\u00d7 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/running-speed\/\">k\u00e4yntinopeus<\/a>. Jos py\u00f6rteen taajuus nousee roottorin kanssa samaan aikaan, - <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/natural-frequency\/\">ominaistaajuus<\/a>, se lukittuu ja eskaloituu paljon v\u00e4kivaltaisemmaksi - <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/shaft-whip\/\">akselin heilahtelu<\/a> tila.<\/li>\n<li><strong>Koneistuksessa esiintyv\u00e4 kolina:<\/strong> sorvauksessa tai jyrsinn\u00e4ss\u00e4 ter\u00e4v\u00e4r\u00e4htely (chatter) alkaa, kun leikkuuty\u00f6kalu alkaa t\u00e4rist\u00e4. V\u00e4r\u00e4htely saa lastun paksuuden vaihtelemaan, lastun vaihteleva paksuus saa leikkausvoiman vaihtelemaan, ja vaihteleva voima pumppaa energiaa takaisin ty\u00f6kalun v\u00e4r\u00e4htelyyn \u2014 se kasvaa rajuun, itse\u00e4\u00e4n yll\u00e4pit\u00e4v\u00e4\u00e4n kolinaan, joka tuhoaa pinnan viimeistelyn ja ty\u00f6kalun.<\/li>\n<li><strong>Aerodynaaminen lepatus:<\/strong> lentokoneen siiven (tai turbiinilapojen) yhdistetty taivutus- ja kiertov\u00e4r\u00e4htely, jossa liike muuttaa aerodynaamista profiilia, muuttunut profiili muuttaa ilmanpainetta, ja muuttunut paine sy\u00f6tt\u00e4\u00e4 energiaa takaisin liikkeeseen - mik\u00e4 johtaa katastrofaaliseen vikaantumiseen, jos sit\u00e4 ei hallita.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/rotor-rub\/\">Roottorin hankaus<\/a>:<\/strong> kun roottori koskettaa paikallaan olevaa osaa, hankauskitka l\u00e4mmitt\u00e4\u00e4 roottoria paikallisesti ja taivuttaa sit\u00e4. Taipuma lis\u00e4\u00e4 hankausvoimaa, mik\u00e4 lis\u00e4\u00e4 l\u00e4mp\u00f6\u00e4 ja taipumaa, mik\u00e4 luo l\u00e4mp\u00f6palautesilmukan, joka voi johtaa kiinnilukkiutumiseen.<\/li>\n<\/ul>\n<p>Kaksi muuta tiet\u00e4misen arvoista nestem\u00e4ist\u00e4 serkkua ovat seuraavat. <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/steam-whirl\/\">h\u00f6yrypy\u00f6rre<\/a> turbiineissa esiintyv\u00e4t ilmi\u00f6t ja laajempi virtauksen aiheuttamien ep\u00e4vakauksien perhe, joita ohjaavat <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/aerodynamic-forces\/\">aerodynaamiset voimat<\/a>, jotka molemmat noudattavat samaa energianpalautuslogiikkaa.<\/p>\n<h2>3. Itsest\u00e4\u00e4n her\u00e4tetty vs. pakotettu v\u00e4r\u00e4htely yhdell\u00e4 silm\u00e4yksell\u00e4<\/h2>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Ominaisuus<\/th>\n<th>Pakotettu t\u00e4rin\u00e4<\/th>\n<th>Itsevirittyv\u00e4 v\u00e4r\u00e4htely<\/th>\n<\/tr>\n<tr>\n<td>Pakottava taajuus<\/td>\n<td>Asetetaan ulkoisella tulolla (esim. 1\u00d7 ep\u00e4tasapainoa varten).<\/td>\n<td>J\u00e4rjestelm\u00e4n itsens\u00e4 asettama, usein ominaistaajuus.<\/td>\n<\/tr>\n<tr>\n<td>Taajuus vs. nopeus<\/td>\n<td>Seuraa py\u00f6rimisnopeutta<\/td>\n<td>Usein ep\u00e4synkroninen, eik\u00e4 seuraa 1\u00d7:aa<\/td>\n<\/tr>\n<tr>\n<td>Amplitudin k\u00e4ytt\u00e4ytyminen<\/td>\n<td>Vakaa, verrannollinen voimaan<\/td>\n<td>Voi kasvaa rajattomasti, kunnes ep\u00e4lineaarisuus puuttuu asiaan.<\/td>\n<\/tr>\n<tr>\n<td>Energial\u00e4hde<\/td>\n<td>Jaksoittainen ulkoinen voima<\/td>\n<td>Tasainen l\u00e4hde (py\u00f6riminen, virtaus, leikkaaminen), jota liike hy\u00f6dynt\u00e4\u00e4.<\/td>\n<\/tr>\n<\/table>\n<h2>4. Keskeiset ominaisuudet ja diagnoosi<\/h2>\n<p>Itsest\u00e4\u00e4n her\u00e4tetyill\u00e4 v\u00e4r\u00e4htelyill\u00e4 on taipumus j\u00e4tt\u00e4\u00e4 erottuvat sormenj\u00e4ljet <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/spectrum\/\">FFT-spektri<\/a>:<\/p>\n<ul>\n<li><strong>Ep\u00e4synkroniset taajuudet:<\/strong> t\u00e4rin\u00e4 ei yleens\u00e4 ole py\u00f6rimisnopeuden kokonaislukukerroin tai harmoninen. Se on yleens\u00e4 alisynkronisella taajuudella.<\/li>\n<li><strong>Ep\u00e4vakaus:<\/strong> amplitudi voi olla hyvin ep\u00e4s\u00e4\u00e4nn\u00f6llinen ja kasvaa nopeasti nopeuden, l\u00e4mp\u00f6tilan tai kuormituksen pienist\u00e4 muutoksista.<\/li>\n<li><strong>\u00c4killinen puhkeaminen:<\/strong> t\u00e4rin\u00e4 voi puuttua kokonaan, kunnes kone ylitt\u00e4\u00e4 tietyn nopeus- tai kuormituskynnyksen \u2013 joka liittyy usein <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/critical-speed\/\">kriittinen nopeus<\/a> \u2013 jolloin se ilmestyy \u00e4killisesti ja suurella amplitudilla.<\/li>\n<\/ul>\n<p>Diagnoosi tarkoittaa n\u00e4iden tyypillisten ep\u00e4synkronisten piikkien tunnistamista ja sen j\u00e4lkeen p\u00e4\u00e4ttely\u00e4 fyysisest\u00e4 mekanismista, joka voi aiheuttaa t\u00e4llaisen ep\u00e4vakauden kyseisess\u00e4 koneessa. Koska puhkeaminen on sidoksissa k\u00e4ytt\u00f6olosuhteisiin, py\u00f6rimisnopeuden vaihteluun perustuva tallennus on erityisen paljastava: <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/cascade-plot\/\">kaskadikaavio<\/a> joka on otettu yl\u00f6sajon tai alasajon aikana, osoittaa alisynkronisen komponentin ilmestymisen ja sen lukittumisen ominaistaajuudelle \u2013 mik\u00e4 on kiistaton merkki siit\u00e4, ett\u00e4 py\u00f6rre muuttuu piiskaksi. Laakereihin liittyviss\u00e4 tapauksissa <a href=\"https:\/\/vibromera.eu\/fi\/calculators\/journal-bearing-frequencies\/\">liukulaakerin vikataajuuslaskuri<\/a> auttaa vahvistamaan, kuuluuko ep\u00e4ilty huippu \u00f6ljypy\u00f6rrekaistalle. Sateenvarjotermi t\u00e4lle koko k\u00e4ytt\u00e4ytymiselle on <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/rotor-instability\/\">roottorin ep\u00e4vakaus<\/a>, ja sen erottaminen pakotetusta vasteesta on analyytikon ensimm\u00e4inen ja t\u00e4rkein haarautumiskohta \u2013 koska parannuskeino on t\u00e4ysin erilainen: pakotettua v\u00e4r\u00e4htely\u00e4 v\u00e4hennet\u00e4\u00e4n tasapainottamalla tai kohdistamalla, kun taas itsest\u00e4\u00e4n her\u00e4\u00e4v\u00e4 ep\u00e4vakaus on suunniteltava pois muuttamalla laakerigeometriaa, v\u00e4lyst\u00e4, kuormitusta tai vaimennusta.<\/p>\n<h2>5. Miksi sit\u00e4 ei voida poistaa tasapainottamalla<\/h2>\n<p>Fysiikasta seuraa suoraan k\u00e4yt\u00e4nn\u00f6n varoitus. Koska itsest\u00e4\u00e4n her\u00e4\u00e4v\u00e4 v\u00e4r\u00e4htely ei ole vaste py\u00f6riv\u00e4lle raskaalle pisteelle, sit\u00e4 ei voida korjata lis\u00e4\u00e4m\u00e4ll\u00e4 korjauspainoja - energia tulee laakerinesteest\u00e4, leikkausprosessista tai ilmavirrasta, ei massan ep\u00e4tasapainosta. Juuri t\u00e4m\u00e4n vuoksi huolellinen kentt\u00e4mittaus on t\u00e4rke\u00e4\u00e4 ennen korjaustoimenpiteit\u00e4: kun insin\u00f6\u00f6ri mittaa amplitudin ja vaiheen kannettavalla kaksikanavaisella analysaattorilla, kuten esimerkiksi <a href=\"https:\/\/vibromera.eu\/fi\/tuote\/balanset-1\/\">Balanset-1A<\/a>, vakaa, toistuva 1&times;-vektori viittaa aitoon tasapainotusongelmaan, kun taas ajelehtiva, ep\u00e4synkroninen ja toistumaton komponentti on varoitusmerkki siit\u00e4, ett\u00e4 vika on ep\u00e4vakaus ja ett\u00e4 tasapainottaminen olisi turhaa vaivaa. Lukemalla <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/vibration-analyzer\/\">analysaattori<\/a> oikein siksi est\u00e4\u00e4 klassisen virheen, jossa yritet\u00e4\u00e4n tasapainottaa <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/whirl\/\">py\u00f6rimisliike<\/a>.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/\">\u2190 Takaisin p\u00e4\u00e4hakemistoon<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Selitys itsevirittyneelle v\u00e4r\u00e4htelylle, vaaralliselle v\u00e4r\u00e4htelytyypille, jossa itse liike luo v\u00e4r\u00e4htely\u00e4 yll\u00e4pit\u00e4v\u00e4t tai vahvistavat voimat, kuten \u00f6ljyn py\u00f6rteily ja t\u00e4rin\u00e4.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-230","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/230\/revisions"}],"predecessor-version":[{"id":101308,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/230\/revisions\/101308"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/media?parent=230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/categories?post=230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/tags?post=230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}