{"id":58,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/blade-resonance\/"},"modified":"2026-05-23T22:55:42","modified_gmt":"2026-05-23T22:55:42","slug":"blade-resonance","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/blade-resonance\/","title":{"rendered":"Ce este rezonan\u021ba palelor? Vibra\u021bia ventilatorului \u0219i a turbinei"},"content":{"rendered":"<h1>\u00cen\u021belegerea rezonan\u021bei paletelor<\/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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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\/58?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>Rezonan\u021ba paletelor<\/strong> este un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/resonance\/\">rezonan\u021b\u0103<\/a> condi\u021bie \u00een care palele sau paletele individuale ale unui ventilator, compresor, turbin\u0103 sau pomp\u0103 vibreaz\u0103 la una dintre <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/natural-frequency\/\">frecven\u021be naturale<\/a> ca r\u0103spuns la excita\u021bia produs\u0103 de for\u021bele aerodinamice, vibra\u021biile mecanice sau efectele electromagnetice. Atunci c\u00e2nd frecven\u021ba de excita\u021bie ajunge la frecven\u021ba natural\u0103 a unei pale, oscila\u021bia palei este amplificat\u0103 dramatic, gener\u00e2nd tensiuni alternante ridicate care determin\u0103 cicluri mari <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/fatigue\/\">oboseal\u0103<\/a> fisurarea \u0219i, \u00een cele din urm\u0103, ruperea paletei. Este un fenomen deosebit de perfid, deoarece o singur\u0103 palet\u0103 care rezoneaz\u0103 poate fi aproape invizibil\u0103 pentru m\u0103sur\u0103torile vibra\u021biilor corpului rulmentului utilizate \u00een monitorizarea de rutin\u0103, chiar \u0219i atunci c\u00e2nd paleta respectiv\u0103 este supus\u0103 unui stres distructiv. Rezonan\u021ba paletelor este, prin urmare, un considerent de proiectare de prim ordin \u00een turboma\u0219ini, care poate ap\u0103rea \u00eentr-un ventilator industrial ori de c\u00e2te ori condi\u021biile sale de func\u021bionare se abat de la inten\u021bia ini\u021bial\u0103 de proiectare.<\/p>\n<h2>1. Frecven\u021bele naturale ale palei<\/h2>\n<h3>Moduri fundamentale<\/h3>\n<p>Fiecare pal\u0103 este \u00een sine o structur\u0103 flexibil\u0103 cu mai multe moduri de vibra\u021bie distincte:<\/p>\n<h4>Primul mod de \u00eendoire<\/h4>\n<ul>\n<li>\u00cencovoiere simpl\u0103 \u00een cantilever, cu devierea v\u00e2rfului palei.<\/li>\n<li>Cea mai mic\u0103 frecven\u021b\u0103 natural\u0103 a palei.<\/li>\n<li>Cel mai u\u0219or de excitat \u0219i, prin urmare, cel mai adesea sup\u0103r\u0103tor.<\/li>\n<li>Tipic 100-2000 Hz, \u00een func\u021bie de dimensiunea \u0219i rigiditatea lamei.<\/li>\n<\/ul>\n<h4>Al doilea mod de \u00eendoire<\/h4>\n<ul>\n<li>Un model de \u00eendoire \u00een form\u0103 de S cu un nod de-a lungul palei.<\/li>\n<li>Frecven\u021b\u0103 mai mare - de obicei 3-5\u00d7 primul mod.<\/li>\n<li>Mai pu\u021bin obi\u0219nuit, dar complet posibil.<\/li>\n<\/ul>\n<h4>Mod torsional<\/h4>\n<ul>\n<li>R\u0103sucirea palei \u00een jurul propriei axe.<\/li>\n<li>Frecven\u021ba acesteia depinde de geometria palei \u0219i de modul \u00een care este montat\u0103 pala.<\/li>\n<li>Este excitat u\u0219or de for\u021bele aerodinamice nesta\u021bionare, care se cupleaz\u0103 puternic \u00een torsiune.<\/li>\n<\/ul>\n<h3>Factorii care afecteaz\u0103 frecven\u021ba natural\u0103 a paletei<\/h3>\n<ul>\n<li><strong>Lungimea palei:<\/strong> palele mai lungi au frecven\u021be naturale mai mici.<\/li>\n<li><strong>Grosime:<\/strong> Palele mai groase sunt mai rigide \u0219i rezoneaz\u0103 la frecven\u021be mai \u00eenalte.<\/li>\n<li><strong>Material:<\/strong> raportul rigiditate\/densitate stabile\u0219te frecven\u021ba pentru o anumit\u0103 form\u0103.<\/li>\n<li><strong>Montare:<\/strong> rigiditatea ata\u0219amentului fixeaz\u0103 condi\u021biile limit\u0103, schimb\u00e2nd fiecare mod.<\/li>\n<li><strong>Rigidizare centrifug\u0103:<\/strong> la vitez\u0103, tensiunea centrifug\u0103 asupra palei \u00eei cre\u0219te rigiditatea aparent\u0103 \u0219i \u00eei ridic\u0103 frecven\u021bele naturale - acesta este motivul pentru care frecven\u021bele unei pale trebuie evaluate la viteza de rulare, nu \u00een repaus.<\/li>\n<\/ul>\n<p>Acest ultim efect, rigidizarea centrifug\u0103, este motivul pentru care rezonan\u021ba palei nu poate fi evaluat\u0103 doar dintr-un test static pe banc; acela\u0219i c\u00e2mp centrifugal care rigidizeaz\u0103 pala \u00eei solicit\u0103 \u0219i r\u0103d\u0103cina, o sarcin\u0103 pe care o <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/fan-blade-centrifugal-force\/\">calculator al for\u021bei centrifuge a paletei ventilatorului<\/a> poate cuantifica.<\/p>\n<h2>2. Surse de excita\u021bie<\/h2>\n<h3>Excita\u021bie aerodinamic\u0103<\/h3>\n<h4>Perturb\u0103ri \u00een amonte<\/h4>\n<ul>\n<li>St\u00e2lpii de sus\u021binere sau paletele de ghidare din amonte de rotor genereaz\u0103 siaje pe care le str\u0103bat palele.<\/li>\n<li>Num\u0103rul de perturba\u021bii \u00eenmul\u021bit cu viteza rotorului stabile\u0219te frecven\u021ba de excita\u021bie.<\/li>\n<li>Dac\u0103 acest produs coincide cu frecven\u021ba natural\u0103 a palei, rezult\u0103 rezonan\u021ba.<\/li>\n<\/ul>\n<h4>Turbulen\u021b\u0103 de flux<\/h4>\n<ul>\n<li>Fluxul nesta\u021bionar asigur\u0103 o excita\u021bie \u00een band\u0103 larg\u0103, aleatorie prin <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/turbulence\/\">turbulen\u021ba fluxului<\/a>.<\/li>\n<li>Acesta poate excita un mod al palei ori de c\u00e2te ori transport\u0103 energie la frecven\u021ba potrivit\u0103.<\/li>\n<li>Aceasta este frecvent\u0103 \u00een cazul func\u021bion\u0103rii \u00een afara proiectului, c\u00e2nd debitul nu mai urm\u0103re\u0219te cu precizie paletele.<\/li>\n<\/ul>\n<h4>Rezonan\u021b\u0103 acustic\u0103<\/h4>\n<ul>\n<li>Se pot forma unde acustice sta\u021bionare \u00een conducte.<\/li>\n<li>Pulsa\u021biile lor de presiune pot excita direct paletele.<\/li>\n<li>Pericolul atinge cote maxime atunci c\u00e2nd un mod acustic se cupleaz\u0103 cu un mod structural al palei la aceea\u0219i frecven\u021b\u0103.<\/li>\n<\/ul>\n<h3>Excita\u021bie mecanic\u0103<\/h3>\n<ul>\n<li>Rotor <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> cre\u00e2nd o vibra\u021bie de 1\u00d7 care este transmis\u0103 \u00een palete.<\/li>\n<li><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/misalignment\/\">Nealiniere<\/a> contribuind la o excita\u021bie 2\u00d7.<\/li>\n<li>Defectele rulmen\u021bilor injecteaz\u0103 vibra\u021bii de \u00eenalt\u0103 frecven\u021b\u0103 \u00een rotor.<\/li>\n<li>Cuplarea vibra\u021biilor funda\u021biei sau ale carcasei prin structur\u0103 \u00een palete.<\/li>\n<\/ul>\n<h3>Excita\u021bie electromagnetic\u0103 (ventilatoare cu motor)<\/h3>\n<ul>\n<li>O component\u0103 de frecven\u021b\u0103 de linie 2\u00d7 de la motor.<\/li>\n<li>The <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/pole-pass-frequency\/\">frecven\u021ba de trecere a polilor<\/a>.<\/li>\n<li>Dac\u0103 oricare dintre acestea se apropie de frecven\u021ba natural\u0103 a palei, rezonan\u021ba devine posibil\u0103 - astfel \u00eenc\u00e2t a motorului <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/electrical-frequency\/\">frecven\u021ba electric\u0103<\/a> face parte din orice evaluare a rezonan\u021bei paletelor unui ventilator ac\u021bionat direct.<\/li>\n<\/ul>\n<h2>3. Simptome \u0219i detectare<\/h2>\n<h3>Caracteristicile vibra\u021biilor<\/h3>\n<ul>\n<li><strong>Component\u0103 de \u00eenalt\u0103 frecven\u021b\u0103<\/strong> la frecven\u021ba natural\u0103 a palei, adesea \u00een intervalul 200-2000 Hz.<\/li>\n<li><strong>Dependen\u021ba de vitez\u0103:<\/strong> apare numai la anumite viteze de func\u021bionare la care are loc coinciden\u021ba.<\/li>\n<li><strong>Posibil u\u0219oar\u0103 la rulmen\u021bi:<\/strong> deoarece vibra\u021biile palei sunt localizate, este posibil ca acestea s\u0103 se \u00eenregistreze slab \u00een m\u0103sur\u0103torile corpului rulmentului.<\/li>\n<li><strong>Direc\u021bional:<\/strong> aceasta poate fi mai puternic\u0103 \u00een anumite direc\u021bii de m\u0103surare.<\/li>\n<\/ul>\n<h3>Indicatori acustici<\/h3>\n<ul>\n<li>Un vuiet sau fluierat ascu\u021bit la frecven\u021ba de rezonan\u021b\u0103.<\/li>\n<li>Un zgomot tonal clar distinct de sunetul normal de func\u021bionare.<\/li>\n<li>Prezent doar la anumite viteze sau condi\u021bii de curgere<\/li>\n<li>De multe ori sunt foarte puternice, chiar \u0219i atunci c\u00e2nd vibra\u021bia m\u0103surat\u0103 este moderat\u0103.<\/li>\n<\/ul>\n<h3>Dovezi fizice<\/h3>\n<ul>\n<li><strong>Mi\u0219care vizibil\u0103 a paletei:<\/strong> fluturarea (flutter) sau vibra\u021bia individual\u0103 a paletei, care poate fi observat\u0103 uneori cu un stroboscop.<\/li>\n<li><strong>Fisuri de oboseal\u0103<\/strong> la r\u0103d\u0103cinile paletelor sau la alte concentra\u021bii de tensiuni.<\/li>\n<li><strong>Frecare:<\/strong> urme de uzur\u0103 la prinderea paletei care tr\u0103deaz\u0103 mi\u0219carea relativ\u0103.<\/li>\n<li><strong>Palete rupte:<\/strong> rezultatul final \u00een cazul \u00een care rezonan\u021ba nu este corectat\u0103.<\/li>\n<\/ul>\n<h2>4. Provoc\u0103ri legate de detectare<\/h2>\n<h3>De ce rezonan\u021ba paletelor este greu de detectat<\/h3>\n<ul>\n<li>Mi\u0219carea paletei nu se cupleaz\u0103 puternic \u00een carcasa rulmentului.<\/li>\n<li>Accelerometrele standard montate pe rulmen\u021bi \u00eel pot rata complet.<\/li>\n<li>Vibra\u021bia este localizat\u0103 la paletele individuale, nu este r\u0103sp\u00e2ndit\u0103 la nivelul \u00eentregului rotor.<\/li>\n<li>Detectarea fiabil\u0103 poate necesita tehnici de m\u0103surare specializate care vizeaz\u0103 paletele \u00eense\u0219i.<\/li>\n<\/ul>\n<h3>Metode avansate de detectare<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/blade-tip-timing\/\">Sincronizarea v\u00e2rfului palei<\/a>:<\/strong> senzorii f\u0103r\u0103 contact cronometreaz\u0103 trecerea fiec\u0103rei palete pentru a deduce devia\u021bia acesteia, palet\u0103 cu palet\u0103.<\/li>\n<li><strong>M\u0103rci tensometrice:<\/strong> lipite de palete pentru a m\u0103sura stresul direct, necesit\u00e2nd rotor <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/telemetry\/\">telemetrie<\/a> pentru a ob\u021bine semnalul de la rotorul care se rote\u0219te.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/laser-vibrometry\/\">Vibrometrie cu laser<\/a>:<\/strong> m\u0103surarea optic\u0103 f\u0103r\u0103 contact a mi\u0219c\u0103rii paletei.<\/li>\n<li><strong>Monitorizare acustic\u0103:<\/strong> microfoane sau accelerometre montate pe carcas\u0103, amplasate \u00een apropierea paletelor.<\/li>\n<\/ul>\n<h2>5. Consecin\u021bele rezonan\u021bei paletelor<\/h2>\n<h3>Oboseal\u0103 la num\u0103r mare de cicluri<\/h3>\n<ul>\n<li>Rezonan\u021ba impune o tensiune alternant\u0103 mare la r\u0103d\u0103cina paletei.<\/li>\n<li>La sute de hertzi, milioane de cicluri de solicitare se acumuleaz\u0103 \u00een doar c\u00e2teva ore sau zile.<\/li>\n<li>Fisurile de oboseal\u0103 se ini\u021biaz\u0103 \u0219i apoi se propag\u0103 sub aceast\u0103 sarcin\u0103 ciclic\u0103.<\/li>\n<li>Cedarea poate ap\u0103rea brusc, cu pu\u021bine avertismente prealabile la nivelul rulmen\u021bilor.<\/li>\n<\/ul>\n<p>Deoarece deteriorarea este \u00een esen\u021b\u0103 un proces de oboseal\u0103, amplitudinea solicit\u0103rii alternante \u0219i num\u0103rul de cicluri determin\u0103 durata de via\u021b\u0103 a unei palete - rela\u021bia este captat\u0103 de o curb\u0103 S-N \u0219i este facilitat\u0103 de un <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/fatigue-life-calculator\/\">calculator de via\u021b\u0103 la oboseal\u0103<\/a>.<\/p>\n<h3>Eliberarea lamei<\/h3>\n<ul>\n<li>O palet\u0103 complet\u0103 se separ\u0103 de rotor prin cedare la oboseal\u0103.<\/li>\n<li>Masa pierdut\u0103 produce un dezechilibru sever, instantaneu.<\/li>\n<li>Fragmentul eliberat devine un proiectil de mare energie.<\/li>\n<li>Urmeaz\u0103 deterior\u0103ri secundare extinse ale carcasei \u0219i ale componentelor din aval.<\/li>\n<li>Reprezint\u0103 un risc real pentru siguran\u021ba personalului din apropiere.<\/li>\n<\/ul>\n<h2>6. Prevenire \u0219i atenuare<\/h2>\n<h3>Faza de proiectare<\/h3>\n<ul>\n<li><strong>Analiza diagramei Campbell:<\/strong> o <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/campbell-diagram\/\">Diagrama Campbell<\/a> prezice unde se intersecteaz\u0103 frecven\u021bele naturale ale lamei cu liniile de excita\u021bie \u00een \u00eentreaga gam\u0103 de viteze - acelea\u0219i informa\u021bii pe care un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/interference-diagram\/\">diagrama de interferen\u021b\u0103<\/a> prezint\u0103 pentru ansamblurile cu palete.<\/li>\n<li><strong>Separare adecvat\u0103:<\/strong> asigura\u021bi-v\u0103 c\u0103 frecven\u021bele naturale ale paletelor nu coincid cu nicio surs\u0103 de excita\u021bie din domeniul de func\u021bionare.<\/li>\n<li><strong>Reglarea paletei:<\/strong> ajusta\u021bi rigiditatea paletei pentru a-i \u00eendep\u0103rta frecven\u021bele naturale de excita\u021bii.<\/li>\n<li><strong>Amortizare proiectat\u0103:<\/strong> s\u0103 \u00eencorporeze amortizoare de frecare, bandaje (shrouds) sau acoperiri de amortizare.<\/li>\n<\/ul>\n<p>Pentru paletele turbinelor, aceast\u0103 analiz\u0103 este de rutin\u0103; o <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/turbine-blade-frequency-calculator\/\">instrument pentru frecven\u021ba natural\u0103 a paletei turbinei \u0219i diagrama Campbell<\/a> sprijin\u0103 plasarea modurilor paletei \u00een raport cu ordinele motorului pe care trebuie s\u0103 le evite.<\/p>\n<h3>Solu\u021bii Opera\u021bionale<\/h3>\n<ul>\n<li><strong>Modificarea vitezei:<\/strong> func\u021bioneaz\u0103 la o vitez\u0103 care evit\u0103 rezonan\u021ba.<\/li>\n<li><strong>Controlul debitului:<\/strong> regla\u021bi punctul de func\u021bionare pentru a reduce for\u021ba de excita\u021bie.<\/li>\n<li><strong>Benzile de vitez\u0103 interzise:<\/strong> s\u0103 stabileasc\u0103 \u0219i s\u0103 aplice intervalele de vitez\u0103 care trebuie evitate odat\u0103 ce este identificat\u0103 o rezonan\u021b\u0103.<\/li>\n<\/ul>\n<h3>Solu\u021bii de modificare<\/h3>\n<ul>\n<li><strong>Rigidizarea paletei:<\/strong> ad\u0103uga\u021bi material, nervuri sau leg\u0103turi \u00eentre palete pentru a cre\u0219te frecven\u021ba.<\/li>\n<li><strong>Schimba\u021bi num\u0103rul de palete:<\/strong> acest lucru modific\u0103 at\u00e2t frecven\u021ba paletei, c\u00e2t \u0219i modelul de excita\u021bie, deoarece num\u0103rul stabile\u0219te <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/blade-passing-frequency\/\">frecven\u021ba de trecere a paletei<\/a>; un <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/blade-pass-frequency\/\">calculator frecven\u021b\u0103 de trecere a paletei<\/a> ajut\u0103 la verificarea faptului c\u0103 un nou num\u0103r nu relocheaz\u0103 pur \u0219i simplu problema.<\/li>\n<li><strong>Tratamente de amortizare:<\/strong> s\u0103 aplice o amortizare \u00een strat constr\u00e2ns la palete.<\/li>\n<li><strong>\u00cendep\u0103rta\u021bi sursa de excita\u021bie:<\/strong> modific\u0103 perturba\u021biile fluxului din amonte care determin\u0103 rezonan\u021ba.<\/li>\n<\/ul>\n<h2>7. Exemple din industrie<\/h2>\n<h3>Ventilatoare cu tiraj indus (centrale electrice)<\/h3>\n<ul>\n<li>Ventilatoare mari, cu diametrul de 10-20 ft, cu palete lungi.<\/li>\n<li>Frecven\u021be naturale ale paletei \u00een intervalul 50-200 Hz.<\/li>\n<li>Acestea pot coincide cu frecven\u021bele de trecere a paletei sau cu frecven\u021bele electromagnetice ale motorului.<\/li>\n<li>Din punct de vedere istoric, aceast\u0103 combina\u021bie a cauzat defec\u021biuni catastrofale ale paletelor, motiv pentru care astfel de ventilatoare figureaz\u0103 \u00een mod proeminent printre cele documentate <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/fan-defects\/\">defecte ale ventilatorului<\/a>.<\/li>\n<\/ul>\n<h3>Turbine cu gaz<\/h3>\n<ul>\n<li>Compresor de mare vitez\u0103 \u0219i palete de turbin\u0103.<\/li>\n<li>Frecven\u021bele paletei sunt de aproximativ 500-5000 Hz.<\/li>\n<li>Necesit\u0103 analize sofisticate \u00een timpul proiect\u0103rii.<\/li>\n<li>Adesea echipate cu monitorizarea temporiz\u0103rii v\u00e2rfului paletei \u00een servicii critice.<\/li>\n<\/ul>\n<h3>Ventilatoare HVAC<\/h3>\n<ul>\n<li>De obicei, mai pu\u021bin critic\u0103, datorit\u0103 vitezelor \u0219i solicit\u0103rilor mai mici.<\/li>\n<li>Aici, rezonan\u021ba se manifest\u0103 mai des ca o problem\u0103 de zgomot dec\u00e2t ca o amenin\u021bare structural\u0103.<\/li>\n<li>Se rezolv\u0103 de obicei prin schimbarea vitezei sau prin rigidizarea modest\u0103 a paletei.<\/li>\n<\/ul>\n<h2>8. Rolul echilibr\u0103rii \u0219i al m\u0103sur\u0103rii pe teren<\/h2>\n<p>\u00cen timp ce rezonan\u021ba palelor este \u00een principal o problem\u0103 structural\u0103 \u0219i aerodinamic\u0103, excita\u021bia mecanic\u0103 care o poate declan\u0219a este \u00een mare m\u0103sur\u0103 controlabil\u0103 pe teren. Dezechilibrul rotorului trimite o for\u021b\u0103 de 1\u00d7 \u00een pale la fiecare revolu\u021bie, astfel \u00eenc\u00e2t men\u021binerea rotorului bine echilibrat elimin\u0103 una dintre cele mai evitabile c\u0103i de excita\u021bie - \u0219i reduce sarcina sincron\u0103 asupra r\u0103d\u0103cinilor palelor. Un analizor portabil cu dou\u0103 canale, cum ar fi <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> permite unui tehnician s\u0103 echilibreze un ventilator sau un rotor \u00een propriile rulmen\u021bi la viteza de func\u021bionare \u0219i s\u0103 \u00eenregistreze spectrul de vibra\u021bii al carcasei, unde un ton ascu\u021bit \u00een apropierea unei frecven\u021be cunoscute a paletelor poate semnala o rezonan\u021b\u0103 \u00een curs de dezvoltare pentru o investiga\u021bie mai atent\u0103, specializat\u0103. Reducerea dezechilibrului \u0219i a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/misalignment\/\">nealiniere<\/a> nu va vindeca, pe cont propriu, o rezonan\u021b\u0103 real\u0103 a paletei - pentru aceasta este nevoie de o schimbare a frecven\u021bei sau de amortizare suplimentar\u0103 - dar elimin\u0103 for\u021ba mecanic\u0103 care, at\u00e2t de des, \u00eempinge un design marginal la limit\u0103.<\/p>\n<p>Rezonan\u021ba paletelor este un fenomen specializat de vibra\u021bii care se afl\u0103 la intersec\u021bia dintre dinamica structural\u0103 \u0219i interac\u021biunea fluid-structur\u0103. De\u0219i poate fi catastrofal\u0103, ea poate fi prevenit\u0103 printr-o analiz\u0103 de proiectare adecvat\u0103, evitat\u0103 prin restric\u021bii de func\u021bionare sau atenuat\u0103 prin modific\u0103ri structurale - asigur\u00e2nd func\u021bionarea sigur\u0103 \u0219i fiabil\u0103 a utilajelor cu palete, de la ventilatoare HVAC la turbine cu gaz.<\/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 rezonan\u021ba palei, amplificarea vibra\u021biilor atunci c\u00e2nd frecven\u021bele de excita\u021bie se potrivesc cu frecven\u021bele naturale ale palei, provoc\u00e2nd oboseal\u0103 la cicluri \u00eenalte \u0219i o poten\u021bial\u0103 defec\u021biune a palei.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-58","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/58","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\/58\/revisions"}],"predecessor-version":[{"id":101425,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/58\/revisions\/101425"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=58"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=58"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=58"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}