{"id":235,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/shaft-whip\/"},"modified":"2026-07-03T10:10:47","modified_gmt":"2026-07-03T10:10:47","slug":"shaft-whip","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/shaft-whip\/","title":{"rendered":"Ce este biciul arborelui? Explica\u021bia instabilit\u0103\u021bii severe a rotorului"},"content":{"rendered":"<h1>\u00cen\u021belegerea biciuirii arborelui \u00een ma\u0219inile rotative<\/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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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\/235?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>Biciuirea arborelui<\/strong> \u2014 cunoscut ca <em>oil whip<\/em> atunci c\u00e2nd provine din lag\u0103rele hidrodinamice \u2014 este o form\u0103 grav\u0103 de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-instability\/\">instabilitatea rotorului<\/a> marcat de violen\u021b\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/self-excited-vibration\/\">vibra\u021bie autoexcitat\u0103<\/a>. Aceasta apare atunci c\u00e2nd un rotor care func\u021bioneaz\u0103 \u00een lag\u0103re cu film de fluid dep\u0103\u0219e\u0219te o vitez\u0103 critic\u0103, de obicei de aproximativ dou\u0103 ori mai mare dec\u00e2t prima <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/critical-speed\/\">vitez\u0103 critic\u0103<\/a>. Odat\u0103 ce biciuirea se instaleaz\u0103, frecven\u021ba vibra\u021biilor se &#8220;fixeaz\u0103&#8221; pe prima <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/natural-frequency\/\">frecven\u021b\u0103 natural\u0103<\/a> \u0219i r\u0103m\u00e2ne la acest nivel indiferent de orice cre\u0219tere ulterioar\u0103 a vitezei, amplitudinea fiind limitat\u0103 doar de jocul lag\u0103rului \u2014 sau de o defec\u021biune catastrofal\u0103. Este una dintre cele mai periculoase situa\u021bii la utilajele de mare vitez\u0103, deoarece apare brusc, atinge niveluri distructive \u00een c\u00e2teva secunde \u0219i nu poate fi remediat\u0103 prin <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> sau orice alt\u0103 m\u0103sur\u0103 de remediere conven\u021bional\u0103. Aceasta necesit\u0103 oprirea imediat\u0103 a instala\u021biei, urmat\u0103 de modific\u0103ri ale sistemului de lag\u0103re pentru a preveni reapari\u021bia problemei.<\/p>\n<h2>1. Evolu\u021bia: de la \u201ev\u00e2rtejul de ulei\u201d la \u201ebiciul arborelui\u201d<\/h2>\n<p>Biciuirea apare rareori f\u0103r\u0103 semne prevestitoare \u2014 ea reprezint\u0103 punctul final al unei evolu\u021bii \u00een patru etape, pe care un analist atent o poate identifica cu mult \u00eenainte de a ajunge la etapa distructiv\u0103.<\/p>\n<h3>Etapa 1 \u2014 Func\u021bionare stabil\u0103<\/h3>\n<ul>\n<li>Rotorul func\u021bioneaz\u0103 sub pragul de instabilitate.<\/li>\n<li>Doar normal <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/forced-vibration\/\">vibra\u021bie for\u021bat\u0103<\/a> din <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> este prezent.<\/li>\n<li>Pelicula de ulei a lag\u0103rului asigur\u0103 un sprijin stabil \u0219i bine amortizat.<\/li>\n<\/ul>\n<h3>Etapa 2 \u2014 Apari\u021bia v\u00e2rtejului de ulei<\/h3>\n<p>Pe m\u0103sur\u0103 ce viteza dep\u0103\u0219e\u0219te aproximativ de dou\u0103 ori prima vitez\u0103 critic\u0103, <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/oil-whirl\/\">v\u00e2rtej de ulei<\/a> \u00eencepe:<\/p>\n<ul>\n<li>A <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/sub-synchronous\/\">subsincron<\/a> Vibra\u021bia apare la o frecven\u021b\u0103 de aproximativ 0,43\u20130,48 ori viteza arborelui.<\/li>\n<li>Amplitudinea este ini\u021bial moderat\u0103 \u0219i dependent\u0103 de vitez\u0103<\/li>\n<li>Frecven\u021ba v\u00e2rtejului cre\u0219te propor\u021bional cu tura\u021bia arborelui.<\/li>\n<li>Poate fi intermitent sau continuu.<\/li>\n<li>Poate coexista cu vibra\u021bia normal\u0103 de 1\u00d7 cauzat\u0103 de dezechilibru.<\/li>\n<\/ul>\n<h3>Etapa 3 \u2014 Tranzi\u021bia la biciuire<\/h3>\n<p>C\u00e2nd frecven\u021ba v\u00e2rtejului ascendent de ulei cre\u0219te suficient de mult \u00eenc\u00e2t s\u0103 se alinieze cu prima frecven\u021b\u0103 natural\u0103, comportamentul se schimb\u0103 brusc:<\/p>\n<ul>\n<li><strong>Sincronizare de frecven\u021b\u0103:<\/strong> frecven\u021ba de vibra\u021bie nu mai \u021bine pasul cu viteza \u0219i se fixeaz\u0103 la frecven\u021ba natural\u0103.<\/li>\n<li><strong>Amplificare rezonant\u0103:<\/strong> amplitudinea cre\u0219te dramatic deoarece sistemul se afl\u0103 acum \u00een <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/resonance\/\">rezonan\u021b\u0103<\/a>.<\/li>\n<li><strong>Apari\u021bie brusc\u0103:<\/strong> trecerea de la v\u00e2rtej la biciuire poate fi practic instantanee.<\/li>\n<li><strong>Independen\u021ba de vitez\u0103:<\/strong> cre\u0219terile suplimentare ale vitezei nu mai modific\u0103 frecven\u021ba \u2014 ci doar amplitudinea.<\/li>\n<\/ul>\n<h3>Etapa 4 \u2014 Biciuirea arborelui (stare critic\u0103)<\/h3>\n<ul>\n<li>Vibra\u021bia se men\u021bine la o frecven\u021b\u0103 constant\u0103 \u2014 prima frecven\u021b\u0103 natural\u0103, de obicei \u00eentre 40 \u0219i 60 Hz.<\/li>\n<li>Amplitudinea ajunge la 5\u201320 de ori mai mare dec\u00e2t cea a vibra\u021biilor normale cauzate de dezechilibru.<\/li>\n<li>Arborele poate atinge limitele de joc ale lag\u0103rului.<\/li>\n<li>Lag\u0103rele \u0219i uleiul se \u00eenc\u0103lzesc rapid.<\/li>\n<li>Dac\u0103 utilajul nu este oprit, se poate produce o defec\u021biune grav\u0103 \u00een c\u00e2teva minute.<\/li>\n<\/ul>\n<h2>2. Mecanismul fizic<\/h2>\n<p>Biciuirea este generat\u0103 de dinamica fluidelor din \u00eens\u0103\u0219i pelicula de ulei a lag\u0103rului, motiv pentru care nu poate fi eliminat\u0103 prin echilibrare \u2014 energia care provoac\u0103 destabilizarea provine din lubrifiant, nu dintr-un punct de greutate. Secven\u021ba se desf\u0103\u0219oar\u0103 dup\u0103 cum urmeaz\u0103:<\/p>\n<ol>\n<li><strong>Formarea panelor de ulei:<\/strong> Arborele rotativ antreneaz\u0103 lubrifiantul \u00een jurul lag\u0103rului, form\u00e2nd o pan\u0103 sub presiune.<\/li>\n<li><strong>For\u021ba tangen\u021bial\u0103:<\/strong> acea pan\u0103 exercit\u0103 o for\u021b\u0103 asupra fusului \u00eentr-o direc\u021bie perpendicular\u0103 pe deplasarea radial\u0103 \u2014 o for\u021b\u0103 tangen\u021bial\u0103 cuplat\u0103 transversal.<\/li>\n<li><strong>Mi\u0219carea orbitei:<\/strong> for\u021ba tangen\u021bial\u0103 \u00eempinge centrul arborelui spre <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/whirl\/\">v\u00e2rtej<\/a> \u00eentr-un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/orbit\/\">orbit\u0103<\/a> la aproximativ jum\u0103tate din tura\u021bia arborelui.<\/li>\n<li><strong>Extragerea energiei:<\/strong> mi\u0219carea orbital\u0103 preia energie din rota\u021bia arborelui pentru a se men\u021bine \u2014 caracteristica definitorie a unei vibra\u021bii autoexcitate.<\/li>\n<li><strong>Blocarea rezonan\u021bei:<\/strong> atunci c\u00e2nd frecven\u021ba orbital\u0103 coincide cu frecven\u021ba natural\u0103, rezonan\u021ba amplific\u0103 mi\u0219carea.<\/li>\n<li><strong>Ciclu limit\u0103:<\/strong> amplitudinea cre\u0219te p\u00e2n\u0103 c\u00e2nd este limitat\u0103 de jocul rulmentului sau de rupere.<\/li>\n<\/ol>\n<p>Deoarece for\u021ba de excita\u021bie depinde de comportamentul lubrifiantului, orice factor care cre\u0219te rigiditatea peliculei de ulei sau a sistemului <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/damping\/\">amortizare<\/a> cre\u0219te viteza cu care apare instabilitatea.<\/p>\n<h2>3. Identificarea diagnosticului<\/h2>\n<p>Efectul de bici al arborelui las\u0103 o amprent\u0103 inconfundabil\u0103 \u00een datele privind vibra\u021biile, ceea ce permite depistarea timpurie a problemei dac\u0103 se analizeaz\u0103 graficele corespunz\u0103toare.<\/p>\n<h3>Semn\u0103tura vibra\u021biilor<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/spectrum\/\">Spectru<\/a>:<\/strong> un v\u00e2rf pronun\u021bat la frecven\u021ba subsincron\u0103 (prima frecven\u021b\u0103 natural\u0103), care r\u0103m\u00e2ne constant indiferent de varia\u021biile de vitez\u0103.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/waterfall-plot\/\">Diagram\u0103 \u00een cascad\u0103<\/a>:<\/strong> componenta subsincron\u0103 se prezint\u0103 sub forma unei linii verticale (frecven\u021b\u0103 constant\u0103), spre deosebire de linia diagonal\u0103 caracteristic\u0103 unei componente propor\u021bionale cu viteza.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/order-analysis\/\">Analiza de ordine<\/a>:<\/strong> un ordin frac\u021bionar care <em>scade<\/em> pe m\u0103sur\u0103 ce viteza cre\u0219te \u2014 de exemplu, trec\u00e2nd de la 0,5\u00d7 la 0,4\u00d7 \u0219i apoi la 0,35\u00d7 \u2014 deoarece frecven\u021ba r\u0103m\u00e2ne constant\u0103 \u00een timp ce viteza cre\u0219te.<\/li>\n<li><strong>Orbit\u0103:<\/strong> o orbit\u0103 mare, circular\u0103 sau eliptic\u0103, la frecven\u021ba natural\u0103.<\/li>\n<\/ul>\n<p>A <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bode-plot\/\">Diagrama Bode<\/a> luate pe <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/coastdown\/\">decelerare libera<\/a> distinge \u0219i mai clar o rezonan\u021b\u0103 adev\u0103rat\u0103 de un efect de bici, \u00eentruc\u00e2t linia subsincron\u0103 blocat\u0103 se comport\u0103 cu totul diferit fa\u021b\u0103 de v\u00e2rful de vitez\u0103 critic\u0103 sincron\u0103.<\/p>\n<h3>Vitez\u0103 de debut<\/h3>\n<ul>\n<li><strong>Prag tipic:<\/strong> 2,0\u20132,5 ori viteza critic\u0103 ini\u021bial\u0103.<\/li>\n<li><strong>\u00cen func\u021bie de rulment:<\/strong> pragul exact variaz\u0103 \u00een func\u021bie de modelul rulmentului, <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/preload\/\">pre\u00eenc\u0103rcare<\/a>\u0219i v\u00e2scozitatea uleiului.<\/li>\n<li><strong>Apari\u021bie brusc\u0103:<\/strong> o u\u0219oar\u0103 cre\u0219tere a vitezei poate face ca rotorul s\u0103 treac\u0103 de la o stare stabil\u0103 la una complet instabil\u0103.<\/li>\n<\/ul>\n<h2>4. Strategii de prevenire<\/h2>\n<p>Deoarece efectul de bici nu poate fi compensat, m\u0103surile de prevenire se concentreaz\u0103 pe <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/journal-bearing\/\">lag\u0103r cu alunecare<\/a> \u0219i despre modul de func\u021bionare al ma\u0219inii.<\/p>\n<h3>Modific\u0103ri ale designului rulmentului<\/h3>\n<p><strong>1. Rulmen\u021bi cu pl\u0103ci basculante<\/strong> \u2014 cea mai eficient\u0103 solu\u021bie. Pl\u0103cu\u021bele se rotesc independent, elimin\u00e2nd for\u021ba de cuplare transversal\u0103 care provoac\u0103 instabilitate; acestea sunt intrinsec stabile pe o gam\u0103 larg\u0103 de viteze \u0219i reprezint\u0103 standardul industrial pentru turbomotoarele de mare vitez\u0103.<\/p>\n<p><strong>2. Rulmen\u021bi cu barier\u0103 de presiune<\/strong> \u2014 un rulment cilindric modificat, prev\u0103zut cu o canelur\u0103 sau o barier\u0103 care spore\u0219te amortizarea \u0219i rigiditatea efectiv\u0103; mai ieftin dec\u00e2t rulmentul cu pl\u0103ci basculante, dar mai pu\u021bin eficient.<\/p>\n<p><strong>3. Pre\u00eenc\u0103rcarea rulmentului<\/strong> \u2014 aplicarea unei pre\u00eenc\u0103rc\u0103ri radiale (adesea prin intermediul unui design cu alezaj decalat) spore\u0219te rigiditatea \u0219i ridic\u0103 pragul de instabilitate.<\/p>\n<p><strong>4. <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/squeeze-film-damper\/\">Amortizoare cu pelicul\u0103 de compresie<\/a><\/strong> \u2014 un element de amortizare extern care \u00eenconjoar\u0103 rulmentul \u0219i asigur\u0103 amortizarea f\u0103r\u0103 a fi necesar\u0103 reproiectarea rulmentului \u00een sine, fiind o solu\u021bie potrivit\u0103 pentru moderniz\u0103ri.<\/p>\n<h3>M\u0103suri opera\u021bionale<\/h3>\n<ul>\n<li><strong>Limita de vitez\u0103:<\/strong> men\u021bine\u021bi viteza maxim\u0103 sub pragul stabilit \u2014 de obicei sub 1,8 ori valoarea primei viteze critice.<\/li>\n<li><strong>Gestionarea sarcinii:<\/strong> opera\u021bi la sarcini mai mari ale rulmentului acolo unde este posibil, deoarece cre\u0219terea sarcinii spore\u0219te amortizarea.<\/li>\n<li><strong>Controlul temperaturii uleiului:<\/strong> Un ulei mai rece este mai v\u00e2scos \u0219i are un efect stabilizator mai puternic.<\/li>\n<li><strong>Monitorizare:<\/strong> continuu <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration-monitoring\/\">monitorizarea vibra\u021biilor<\/a> cu alarme care monitorizeaz\u0103 \u00een mod specific banda subsincron\u0103.<\/li>\n<\/ul>\n<h2>5. Consecin\u021be \u0219i prejudicii<\/h2>\n<h3>Efecte imediate<\/h3>\n<ul>\n<li><strong>Vibra\u021bii puternice:<\/strong> amplitudinile pot ajunge la c\u00e2\u021biva milimetri (sute de mils).<\/li>\n<li><strong>Zgomot:<\/strong> un sunet puternic \u0219i distinctiv, cu totul diferit de cel al func\u021bion\u0103rii normale.<\/li>\n<li><strong>\u00cenc\u0103lzirea rapid\u0103 a rulmentului:<\/strong> temperaturile pot urca cu 20\u201350 \u00b0C \u00een c\u00e2teva minute.<\/li>\n<li><strong>Degradarea uleiului:<\/strong> temperaturile ridicate \u0219i for\u021bele de forfecare intense deterioreaz\u0103 lubrifiantul.<\/li>\n<\/ul>\n<h3>Defec\u021biuni poten\u021biale<\/h3>\n<ul>\n<li><strong>\u0218tergere rulment:<\/strong> c\u0103ptu\u0219eala din babbitt se tope\u0219te \u0219i este \u00eendep\u0103rtat\u0103.<\/li>\n<li><strong>Deteriorarea arborelui:<\/strong> zg\u00e2riere, abraziune sau deformare permanent\u0103.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/seal-defects\/\">E\u0219ecul garniturii<\/a>:<\/strong> mi\u0219carea excesiv\u0103 a arborelui distruge garniturile.<\/li>\n<li><strong>Ruperea arborelui:<\/strong> ciclu \u00eenalt <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/fatigue\/\">oboseal\u0103<\/a> din cauza oscila\u021biei violente.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/coupling-defects\/\">Deteriorarea cuplajului<\/a>:<\/strong> for\u021bele transmise distrug cuplajele.<\/li>\n<\/ul>\n<h2>6. Fenomene conexe<\/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 stadiul preliminar al efectului de bici: acela\u0219i mecanism, dar frecven\u021ba nu s-a sincronizat \u00eenc\u0103 cu frecven\u021ba natural\u0103. Amplitudinea sa este mai mic\u0103, frecven\u021ba sa urmeaz\u0103 viteza la un raport de aproximativ 0,43\u20130,48\u00d7, iar \u00een anumite aplica\u021bii este acceptabil\u0103.<\/p>\n<h3>V\u00e2rtej de abur<\/h3>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/steam-whirl\/\">V\u00e2rtej de abur<\/a> este o instabilitate similar\u0103 la turbinele cu abur, determinat\u0103 de for\u021bele aerodinamice din garniturile tip labirint, mai degrab\u0103 dec\u00e2t de pelicula de ulei a lag\u0103rului. Aceasta se manifest\u0103 prin aceea\u0219i vibra\u021bie subsincron\u0103 care se fixeaz\u0103 pe o frecven\u021b\u0103 natural\u0103.<\/p>\n<h3>Vibra\u021bie de tip bici prin frecare uscat\u0103<\/h3>\n<p>Aceast\u0103 variant\u0103 apare la punctele de etan\u0219are sau din cauza <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-rub\/\">contactul rotor-stator<\/a>. Frecarea constituie mecanismul de destabilizare; este mai pu\u021bin frecvent\u0103 dec\u00e2t efectul de bici al uleiului, dar la fel de periculoas\u0103 \u0219i necesit\u0103 o solu\u021bie diferit\u0103 \u2014 eliminarea contactului sau \u00eembun\u0103t\u0103\u021birea etan\u0219\u0103rii.<\/p>\n<h2>7. Studiu de caz: Vibra\u021bie de tip bici al arborelui compresorului<\/h2>\n<p><strong>Scenariu:<\/strong> un compresor centrifugal de mare vitez\u0103 montat pe lag\u0103re cilindrice simple.<\/p>\n<ul>\n<li><strong>Func\u021bionare normal\u0103:<\/strong> 12.000 rpm cu o amplitudine a vibra\u021biilor de 2,5 mm\/s.<\/li>\n<li><strong>Cre\u0219terea vitezei:<\/strong> operatorul a crescut tura\u021bia la 13.500 rpm pentru a ob\u021bine o capacitate mai mare.<\/li>\n<li><strong>Debut:<\/strong> la 13.200 rpm s-a produs o vibra\u021bie brusc\u0103 \u0219i violent\u0103.<\/li>\n<li><strong>Simptome:<\/strong> 25 mm\/s at a constant 105 Hz; bearing temperature rose from 70 \u00b0C to 95 \u00b0C in three minutes.<\/li>\n<li><strong>M\u0103suri de urgen\u021b\u0103:<\/strong> Oprirea imediat\u0103 a prevenit defectarea unui lag\u0103r.<\/li>\n<li><strong>Cauza de baz\u0103:<\/strong> the first critical speed was 6,300 rpm (105 Hz); at 13,200 rpm the rotor crossed the whip threshold of roughly 2\u00d7 critical \u2248 12,600 rpm, and the vibration locked onto the 105 Hz first natural frequency.<\/li>\n<li><strong>Solu\u021bie:<\/strong> lag\u0103rele simple au fost \u00eenlocuite cu lag\u0103re cu patine basculante, permi\u021b\u00e2nd func\u021bionarea \u00een condi\u021bii de siguran\u021b\u0103 p\u00e2n\u0103 la 15.000 rpm.<\/li>\n<\/ul>\n<h2>8. Standarde, practici \u0219i instrumente de teren<\/h2>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/api-684\/\">API 684<\/a>:<\/strong> necesit\u0103 o analiz\u0103 a stabilit\u0103\u021bii rotordinamice pentru turboma\u0219inile de mare vitez\u0103.<\/li>\n<li><strong>API 617:<\/strong> precizeaz\u0103 tipurile de lag\u0103re \u0219i cerin\u021bele de stabilitate pentru compresoarele centrifuge.<\/li>\n<li><strong>ISO 10814:<\/strong> Ofer\u0103 \u00eendrum\u0103ri privind alegerea rulmen\u021bilor pentru stabilitate<\/li>\n<li><strong>Practica din domeniu:<\/strong> Lag\u0103rele cu patine basculante sunt standard pentru echipamentele care func\u021bioneaz\u0103 la o vitez\u0103 de peste dou\u0103 ori mai mare dec\u00e2t prima vitez\u0103 critic\u0103.<\/li>\n<\/ul>\n<p>\u00cen practic\u0103, m\u0103sura de siguran\u021b\u0103 de baz\u0103 const\u0103 \u00een detectarea semnalului precursor \u00eenainte ca rotorul s\u0103 ajung\u0103 \u00een starea de vibra\u021bie de tip bici. Un analizor portabil cu dou\u0103 canale, precum <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> permite unui inginer s\u0103 \u00eenregistreze amplitudinea, <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase\/\">faz\u0103<\/a> \u0219i spectrul \u00een timpul unei accelerari controlate \u0219i s\u0103 monitorizeze direct banda subsincron\u0103 \u2014 dac\u0103 o semnatur\u0103 stabil\u0103 de 1\u00d7 dezvolt\u0103 brusc un v\u00e2rf fix, independent de tura\u021bie, \u00een apropierea primei frecven\u021be naturale, rotorul se afl\u0103 la limita de vibra\u021bie de tip bici, iar tura\u021bia trebuie redus\u0103. Acela\u0219i instrument confirm\u0103 ulterior c\u0103 dezechilibrul subiacent se \u00eencadreaz\u0103 \u00een toleran\u021b\u0103, excluzu\u00e2ndu-l ca factor de excita\u021bie. Vibra\u021bia de tip bici al arborelui r\u0103m\u00e2ne un mod de defectare catastrofal, gestionat cel mai bine prin selectarea \u0219i proiectarea corect\u0103 a lag\u0103relor; recunoa\u0219terea semnaturii sale distincte subsincrone, blocat\u0103 \u00een frecven\u021b\u0103, este cea care permite diagnosticarea rapid\u0103 \u0219i r\u0103spunsul decisiv de urgen\u021b\u0103 care protejeaz\u0103 echipamentele scumpe 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 vibra\u021biile bicioase ale arborelui, o instabilitate sever\u0103 a vibra\u021biilor autoexcitate \u00een rulmen\u021bii cu pelicul\u0103 fluid\u0103 care apare la viteze mari, provoc\u00e2nd oscila\u021bii violente la frecven\u021b\u0103 natural\u0103.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-235","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/235","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":2,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/235\/revisions"}],"predecessor-version":[{"id":102183,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/235\/revisions\/102183"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}