{"id":219,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/rotor-instability\/"},"modified":"2026-05-23T22:53:31","modified_gmt":"2026-05-23T22:53:31","slug":"rotor-instability","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/rotor-instability\/","title":{"rendered":"Ce este instabilitatea rotorului? Vibra\u021bii autoexcitate"},"content":{"rendered":"<h1>\u00cen\u021belegerea instabilit\u0103\u021bii rotorului<\/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\/ro\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii 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 kit complet \u2014 echilibrator portabil \u0219i analizor de vibra\u021bii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii Balanset-1A\">Echilibrator portabil \u0219i analizor de vibra\u021bii 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Portable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201ePortable balancer &amp; Vibration analyzer Balanset-1A\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">\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=\"Prim-plan senzor de vibra\u021bii Balanset-1A\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">Senzor de vibra\u021bii<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Vibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201eVibration sensor\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">\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=\"Senzor optic (tahometru cu laser)\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">Senzor optic (tahometru cu laser)<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Optical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201eOptical Sensor (Laser Tachometer)\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/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=\"Kit de echilibrare a rotorului Vibromera: geant\u0103 de transport, condi\u021bioner de semnal multicanal, analizor portabil, baz\u0103 magnetic\u0103, senzori de vibra\u021bii \u0219i cabluri spiralate.\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Balanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201eBalanset-4\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic 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=\"Baza magnetic\u0103.\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic Insize-60-kgf\">Stand magnetic 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Magnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201eMagnetic Stand Insize-60-kgf\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">\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=\"Band\u0103 reflectorizant\u0103\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">Band\u0103 reflectorizant\u0103<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Reflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201eReflective tape\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &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=\"Con\u021binutul kitului Balanset-1A cu unitate de interfa\u021b\u0103, senzori, tahometru \u0219i accesorii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &quot;Balanset-1A&quot; OEM\">Echilibrator dinamic \"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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/219?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Dynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201eDynamic balancer \u201cBalanset-1A\u201d OEM\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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>Instabilitatea rotorului<\/strong> este o stare a ma\u0219inilor rotative \u00een care <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/self-excited-vibration\/\">vibra\u021bie autoexcitat\u0103<\/a> se dezvolt\u0103 \u0219i cre\u0219te f\u0103r\u0103 limite, fiind restric\u021bionat\u0103 doar de efectele neliniare sau de e\u0219ecul total. Spre deosebire de vibra\u021biile provenite din <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> sau <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/misalignment\/\">nealiniere<\/a> - care sunt <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/forced-vibration\/\">vibra\u021bii for\u021bate<\/a> determinat\u0103 de for\u021be externe \u2014 instabilitatea este o oscila\u021bie care se autoalimenteaz\u0103, care preia continuu energie din rota\u021bia constant\u0103 a arborelui \u0219i o transfer\u0103 c\u0103tre mi\u0219carea vibratorie. Este unul dintre cele mai periculoase fenomene din <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-dynamics\/\">dinamica rotorului<\/a>: poate ap\u0103rea brusc, poate atinge amplitudini devastatoare \u00een c\u00e2teva secunde \u0219i \u2014 ceea ce este esen\u021bial \u2014 nu poate fi vindecat\u0103 prin <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> sau aliniere. Aceasta necesit\u0103 oprirea imediat\u0103 \u0219i remedierea mecanismului destabilizator care st\u0103 la baza acesteia.<\/p>\n<h2>1. Vibra\u021bia for\u021bat\u0103 vs. vibra\u021bia autoindus\u0103<\/h2>\n<p>Cel mai important concept pentru \u00een\u021belegerea instabilit\u0103\u021bii este distinc\u021bia dintre vibra\u021bia indus\u0103 \u0219i vibra\u021bia spontan\u0103.<\/p>\n<h3>Vibra\u021bie for\u021bat\u0103 (stabil\u0103)<\/h3>\n<p>Majoritatea vibra\u021biilor utilajelor sunt provocate de for\u021be externe. O for\u021b\u0103 extern\u0103 \u2014 dezechilibru, nealiniere, un arbore \u00eendoit \u2014 genereaz\u0103 mi\u0219carea, iar sistemul pur \u0219i simplu reac\u021bioneaz\u0103:<\/p>\n<ul>\n<li>Amplitudinea este propor\u021bional\u0103 cu intensitatea for\u021bei.<\/li>\n<li>Frecven\u021ba corespunde frecven\u021bei de ac\u021bionare (1\u00d7, 2\u00d7 \u0219i a\u0219a mai departe).<\/li>\n<li>\u00cendep\u0103rteaz\u0103 for\u021ba \u0219i vibra\u021bia dispare.<\/li>\n<li>Sistemul este stabil; vibra\u021biile nu cresc la nesf\u00e2r\u0219it.<\/li>\n<\/ul>\n<h3>Vibra\u021bie autoexcitat\u0103 (instabil\u0103)<\/h3>\n<p>Instabilitatea este fundamental diferit\u0103. Energia este extras\u0103 din rota\u021bie \u00eens\u0103\u0219i, \u00een loc s\u0103 fie furnizat\u0103 de o for\u021b\u0103 extern\u0103:<\/p>\n<ul>\n<li>Amplitudinea cre\u0219te exponen\u021bial odat\u0103 ce viteza prag este dep\u0103\u0219it\u0103<\/li>\n<li>Frecven\u021ba se situeaz\u0103 de obicei la sau \u00een apropierea valorii de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/natural-frequency\/\">frecven\u021b\u0103 natural\u0103<\/a>\u0219i este de obicei <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/sub-synchronous\/\">subsincron<\/a>.<\/li>\n<li>Aceasta continu\u0103 \u0219i se amplific\u0103 chiar \u0219i dup\u0103 ce dezechilibrul a fost corectat complet.<\/li>\n<li>Sistemul este instabil; doar o oprire sau o interven\u021bie fizic\u0103 \u00eel pot opri.<\/li>\n<\/ul>\n<h2>2. Tipuri frecvente de instabilitate a rotorului<\/h2>\n<h3>V\u00e2rtej de ulei<\/h3>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/oil-whirl\/\">V\u00e2rtej de ulei<\/a> este cea mai frecvent\u0103 instabilitate \u00een pelicula de fluid <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/journal-bearing\/\">lag\u0103r cu alunecare<\/a> sisteme. Pana de ulei care sus\u021bine arborele genereaz\u0103 o for\u021b\u0103 tangen\u021bial\u0103 care \u00eempinge fusul \u00een spa\u021biul liber al rulmentului. Aceasta apare la aproximativ 0,42\u20130,48\u00d7 viteza de func\u021bionare (sub-sincron\u0103), de obicei odat\u0103 ce viteza dep\u0103\u0219e\u0219te aproximativ dublul primei <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/critical-speed\/\">vitez\u0103 critic\u0103<\/a>\u0219i se manifest\u0103 sub forma unei vibra\u021bii subsincrone de mare amplitudine, care se accentueaz\u0103 odat\u0103 cu cre\u0219terea vitezei. Modific\u0103ri la nivelul proiect\u0103rii rulmen\u021bilor, ad\u0103ugarea <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/preload\/\">pre\u00eenc\u0103rcare<\/a>sau configura\u021biile cu decalaj reprezint\u0103 solu\u021biile obi\u0219nuite.<\/p>\n<h3>Oil whip (instabilitate sever\u0103)<\/h3>\n<p>\u201eOil whip\u201d este forma matur\u0103 \u0219i periculoas\u0103 a \u201eoil whirl\u201d. Pe m\u0103sur\u0103 ce rotorul accelereaz\u0103, frecven\u021ba v\u00e2rtejului cre\u0219te p\u00e2n\u0103 c\u00e2nd se fixeaz\u0103 pe prima frecven\u021b\u0103 natural\u0103 \u0219i r\u0103m\u00e2ne acolo, indiferent de cre\u0219terile ulterioare ale vitezei. Rezultatul este o amplitudine foarte mare la o frecven\u021b\u0103 constant\u0103, capabil\u0103 s\u0103 distrug\u0103 rulmen\u021bii \u0219i arborele \u00een c\u00e2teva minute. Trecerea de la un v\u00e2rtej controlabil la un \u201eoil whip\u201d distructiv este motivul pentru care instabilitatea nu trebuie tolerat\u0103 niciodat\u0103.<\/p>\n<h3>V\u00e2rtejuri de abur \u0219i instabilit\u0103\u021bi aerodinamice<\/h3>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/steam-whirl\/\">V\u00e2rtej de abur<\/a> Aceast\u0103 problem\u0103 apare la turbinele cu abur echipate cu garnituri de tip labirint, unde for\u021bele aerodinamice de cuplare transversal\u0103 din spa\u021biile libere ale garniturii genereaz\u0103 o oscila\u021bie subsincron\u0103 \u00een apropierea unei frecven\u021be naturale, \u00een condi\u021bii de diferen\u021be mari de presiune. Fr\u00e2nele de turbulen\u021b\u0103, dispozitivele anti-turbulen\u021b\u0103 \u0219i modificarea geometriei garniturii reprezint\u0103 solu\u021biile tipice.<\/p>\n<h3>Biciuirea arborelui<\/h3>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/shaft-whip\/\">Biciuirea arborelui<\/a> este o denumire general\u0103 pentru mai multe mecanisme cu autoexcita\u021bie, printre care se num\u0103r\u0103 amortizarea intern\u0103 (histeretic\u0103) din materialul arborelui, efectul de bici generat de frecarea uscat\u0103 la garnituri sau puncte de frecare, precum \u0219i for\u021bele de cuplare transversal\u0103 aerodinamice sau hidrodinamice. Familia mai larg\u0103 a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/whirl\/\">whirl \u0219i whip<\/a> toate aceste fenomene au \u00een comun acela\u0219i transfer de energie autosus\u021binut.<\/p>\n<h2>3. Caracteristici \u0219i simptome<\/h2>\n<h3>Semn\u0103tura vibra\u021bional\u0103<\/h3>\n<p>Instabilitatea genereaz\u0103 un set caracteristic de amprente \u00een date:<\/p>\n<ul>\n<li><strong>Frecven\u021b\u0103 subsincron\u0103:<\/strong> o component\u0103 dominant\u0103 sub 1\u00d7 viteza de func\u021bionare, de obicei \u00een jur de 0,4\u20130,5\u00d7.<\/li>\n<li><strong>Independen\u021ba de vitez\u0103:<\/strong> Odat\u0103 ce instabilitatea se instaleaz\u0103, frecven\u021ba r\u0103m\u00e2ne constant\u0103 chiar \u0219i atunci c\u00e2nd viteza se modific\u0103.<\/li>\n<li><strong>Cre\u0219tere rapid\u0103:<\/strong> amplitudinea cre\u0219te exponen\u021bial \u00een momentul \u00een care se dep\u0103\u0219e\u0219te viteza de prag.<\/li>\n<li><strong>Amplitudine mare:<\/strong> poate atinge o amplitudine de 2\u201310 ori mai mare dec\u00e2t cea a vibra\u021biilor obi\u0219nuite cauzate de dezechilibru.<\/li>\n<li><strong>Precesia \u00eenainte:<\/strong> a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/orbit\/\">orbita arborelui<\/a> se rote\u0219te \u00een aceea\u0219i direc\u021bie cu arborele.<\/li>\n<\/ul>\n<h3>Comportament de debut<\/h3>\n<p>Instabilitatea este determinat\u0103 de o vitez\u0103 prag. Sub aceast\u0103 valoare, sistemul este stabil \u0219i se manifest\u0103 doar vibra\u021bii for\u021bate; la prag, o mic\u0103 perturbare este suficient\u0103 pentru a declan\u0219a instabilitatea; iar peste aceast\u0103 valoare, instabilitatea se dezvolt\u0103 rapid. La \u00eenceputul ciclului de via\u021b\u0103 al ma\u0219inii, aceasta poate oscila intermitent \u00eenainte de a ajunge la o oscila\u021bie continu\u0103 \u0219i tot mai intens\u0103.<\/p>\n<h2>4. Identificarea diagnosticului<\/h2>\n<p>Cheia diagnosticului const\u0103 \u00een diferen\u021bierea instabilit\u0103\u021bii auto-excitate de vibra\u021bia for\u021bat\u0103 obi\u0219nuit\u0103. Contrastul este evident:<\/p>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Caracteristic\u0103<\/th>\n<th>Dezechilibru (for\u021bat)<\/th>\n<th>Instabilitate (autoexcitat\u0103)<\/th>\n<\/tr>\n<tr>\n<td>Frecven\u021b\u0103<\/td>\n<td>1\u00d7 vitez\u0103 de rulare<\/td>\n<td>Subsincron (adesea ~0,45\u00d7)<\/td>\n<\/tr>\n<tr>\n<td>Amplitudine vs. vitez\u0103<\/td>\n<td>Cre\u0219te uniform cu viteza\u00b2<\/td>\n<td>Apari\u021bie brusc\u0103 peste un prag<\/td>\n<\/tr>\n<tr>\n<td>R\u0103spuns la echilibrare<\/td>\n<td>Vibra\u021bii reduse<\/td>\n<td>Nicio \u00eembun\u0103t\u0103\u021bire<\/td>\n<\/tr>\n<tr>\n<td>Frecven\u021ba vs. viteza<\/td>\n<td>Urm\u0103re\u0219te viteza (ordin constant)<\/td>\n<td>Frecven\u021b\u0103 constant\u0103 (ordin variabil)<\/td>\n<\/tr>\n<tr>\n<td>Comportamentul la oprire<\/td>\n<td>Se reduce cu viteza<\/td>\n<td>Poate persista scurt timp dup\u0103 sc\u0103derea vitezei<\/td>\n<\/tr>\n<\/table>\n<h3>Confirmarea instabilit\u0103\u021bii<\/h3>\n<p>Exist\u0103 mai multe tehnici care rezolv\u0103 definitiv aceast\u0103 problem\u0103. <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/order-analysis\/\">Analiza de ordine<\/a> arat\u0103 cum componenta men\u021bine o frecven\u021b\u0103 constant\u0103 \u00een timp ce ordinul s\u0103u se modific\u0103; a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/waterfall-plot\/\">diagram\u0103 cascad\u0103<\/a> eviden\u021biaz\u0103 o linie de frecven\u021b\u0103 care nu \u021bine pasul cu viteza; reglarea echilibrului nu are niciun efect asupra v\u00e2rfului subsincron; \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/orbit\/\">analiza orbitei<\/a> prezint\u0103 o precesie \u00eenainte la o frecven\u021b\u0103 natural\u0103. Un analizor portabil cu dou\u0103 canale, cum ar fi <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> este foarte potrivit pentru \u00eenregistrarea acestor date pe teren \u2014 \u00eenregistr\u00e2nd componenta subsincron\u0103, cre\u0219terea amplitudinii acesteia odat\u0103 cu viteza \u0219i linia de 1\u00d7 \u00een paralel \u2014 astfel \u00eenc\u00e2t un inginer s\u0103 poat\u0103 distinge o instabilitate real\u0103 de un simplu dezechilibru \u00eenainte de a decide dac\u0103 merit\u0103 m\u0103car s\u0103 \u00eencerce echilibrarea. Confirmarea faptului c\u0103 defec\u021biunea este de tip autoexcitat previne gre\u0219eala costisitoare de a \u00eencerca echilibrarea unei probleme pe care echilibrarea nu o poate rezolva.<\/p>\n<h2>5. Prevenire \u0219i atenuare<\/h2>\n<h3>Aspecte legate de proiectare<\/h3>\n<ul>\n<li><strong>Amortizare adecvat\u0103:<\/strong> sistemele de rulmen\u021bi trebuie s\u0103 asigure o capacitate suficient\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/damping\/\">amortizare<\/a> pentru a preveni apari\u021bia instabilit\u0103\u021bii.<\/li>\n<li><strong>Alegerea rulmentului:<\/strong> alege\u021bi tipuri \u0219i configura\u021bii cu o amortizare inerent\u0103 bun\u0103, cum ar fi rulmen\u021bii cu pl\u0103ci basculante sau cei pre\u00eenc\u0103rca\u021bi.<\/li>\n<li><strong>Optimizarea rigidit\u0103\u021bii:<\/strong> regla\u021bi distan\u021ba corespunz\u0103toare dintre arbore \u0219i rulment <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/stiffness\/\">rigiditate<\/a> ratele.<\/li>\n<li><strong>Marja de vitez\u0103 de func\u021bionare:<\/strong> proiecta\u021bi ma\u0219ina astfel \u00eenc\u00e2t s\u0103 func\u021bioneze la viteze sub pragul de instabilitate.<\/li>\n<\/ul>\n<h3>Solu\u021bii de proiectare a rulmen\u021bilor<\/h3>\n<ul>\n<li><strong>Rulmen\u021bi cu pl\u0103ci basculante:<\/strong> intrinsec stabil, alegerea standard pentru serviciile de mare vitez\u0103.<\/li>\n<li><strong>Rulmen\u021bi cu prag de presiune:<\/strong> o geometrie modificat\u0103 care spore\u0219te amortizarea efectiv\u0103.<\/li>\n<li><strong>Pre\u00eenc\u0103rcarea rulmentului:<\/strong> cre\u0219te rigiditatea \u0219i amortizarea \u0219i ridic\u0103 pragul de vitez\u0103.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/squeeze-film-damper\/\">Amortizoare cu pelicul\u0103 de compresie<\/a>:<\/strong> elemente de amortizare externe montate \u00een jurul rulmen\u021bilor.<\/li>\n<\/ul>\n<h3>Solu\u021bii opera\u021bionale<\/h3>\n<ul>\n<li><strong>Restric\u021bionare de vitez\u0103:<\/strong> s\u0103 limiteze viteza maxim\u0103 sub pragul stabilit.<\/li>\n<li><strong>Cre\u0219terea \u00eenc\u0103rc\u0103turii:<\/strong> Sarcinile mai mari pe rulmen\u021bi pot m\u0103ri marja de stabilitate.<\/li>\n<li><strong>Reglarea temperaturii:<\/strong> Temperatura uleiului determin\u0103 v\u00e2scozitatea, iar v\u00e2scozitatea determin\u0103 amortizarea.<\/li>\n<li><strong>Monitorizare continu\u0103:<\/strong> Depistarea timpurie ofer\u0103 timp pentru a opri procesul \u00eenainte ca pagubele s\u0103 apar\u0103.<\/li>\n<\/ul>\n<h2>6. Interven\u021bia \u00een situa\u021bii de urgen\u021b\u0103 \u0219i analiza stabilit\u0103\u021bii<\/h2>\n<p>\u00cen cazul \u00een care apar semne de instabilitate \u00een timpul func\u021bion\u0103rii, procedura de interven\u021bie este clar\u0103:<\/p>\n<ol>\n<li><strong>Ac\u021biona\u021bi imediat:<\/strong> reduce\u021bi viteza sau opri\u021bi-v\u0103 imediat.<\/li>\n<li><strong>Nu \u00eencerca\u021bi s\u0103 regla\u021bi echilibrul:<\/strong> nu poate remedia instabilitatea \u0219i nu face dec\u00e2t s\u0103 piard\u0103 timp pre\u021bios.<\/li>\n<li><strong>Documenta\u021bi condi\u021biile:<\/strong> \u00eenregistra\u021bi viteza la debut, frecven\u021ba \u0219i evolu\u021bia amplitudinii.<\/li>\n<li><strong>Identifica\u021bi cauza principal\u0103:<\/strong> identifica\u021bi mecanismul care ac\u021bioneaz\u0103 \u2014 v\u00e2rtej de ulei, bici, v\u00e2rtej de abur sau bici ac\u021bionat prin frecare.<\/li>\n<li><strong>Aplica\u021bi corectarea:<\/strong> modifica\u021bi rulmen\u021bii, garniturile sau condi\u021biile de func\u021bionare \u00een consecin\u021b\u0103.<\/li>\n<li><strong>Verifica\u021bi remedierea:<\/strong> relua\u021bi func\u021bionarea cu pruden\u021b\u0103, sub supraveghere atent\u0103.<\/li>\n<\/ol>\n<p>Inginerii prev\u0103d \u0219i elimin\u0103 instabilitatea prin intermediul unei analize formale de stabilitate. Acest lucru implic\u0103 calcularea valorilor proprii ale <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-bearing-system\/\">sistem rotor-rulment<\/a>: partea real\u0103 a fiec\u0103rei valori proprii indic\u0103 stabilitatea \u2014 o valoare negativ\u0103 \u00eenseamn\u0103 stabilitate, iar una pozitiv\u0103 \u00eenseamn\u0103 instabilitate \u2014, iar calculul determin\u0103 vitezele-prag la care se produce schimbarea st\u0103rii de stabilitate. Aceast\u0103 activitate se bazeaz\u0103 de obicei pe software specializat \u00een dinamica rotorului \u0219i se reflect\u0103 \u00een alegerile de proiectare care garanteaz\u0103 marje de stabilitate adecvate. De\u0219i mult mai pu\u021bin frecvent\u0103 dec\u00e2t dezechilibrul sau nealinierea, instabilitatea rotorului se num\u0103r\u0103 printre cele mai grave condi\u021bii de vibra\u021bie la ma\u0219inile rotative, iar recunoa\u0219terea mecanismelor \u0219i simptomelor sale este o abilitate esen\u021bial\u0103 pentru oricine lucreaz\u0103 cu echipamente de mare vitez\u0103.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/\">\u2190 \u00cenapoi la indexul principal<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Afla\u021bi despre instabilitatea rotorului, o condi\u021bie periculoas\u0103 de vibra\u021bii autoexcitate \u00een care energia provenit\u0103 din rota\u021bie sus\u021bine sau amplific\u0103 oscila\u021biile, duc\u00e2nd la o poten\u021bial\u0103 defec\u021biune catastrofal\u0103.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-219","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/219","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/219\/revisions"}],"predecessor-version":[{"id":101404,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/219\/revisions\/101404"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}