{"id":232,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/shaft-bow\/"},"modified":"2026-05-23T23:06:20","modified_gmt":"2026-05-23T23:06:20","slug":"shaft-bow","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/shaft-bow\/","title":{"rendered":"Ce este curbura arborelui? Cauze, detectare \u0219i corec\u021bie"},"content":{"rendered":"<h1>\u00cen\u021belegerea curburii 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\/232?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\/232?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\/232?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\/232?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\/232?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\/232?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\/232?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\/232?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, 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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\/232?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\/232?add-to-cart=1852\" 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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\/232?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" 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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\/232?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\/232?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>Curbura arborelui<\/strong> (numit\u0103 \u0219i \u00eendoirea arborelui, curbura rotorului sau pur \u0219i simplu &#8220;curbur\u0103&#8221;) este o afec\u021biune \u00een care un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor\/\">rotor<\/a> arborele a dezvoltat o curbur\u0103 permanent\u0103 sau semipermanent\u0103, f\u0103c\u00e2nd ca linia sa central\u0103 geometric\u0103 s\u0103 se abat\u0103 de la o dreapt\u0103 \u00eentre fusurile de lag\u0103r. Spre deosebire de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/run-out\/\">b\u0103taie radial\u0103<\/a> temporar cauzat de o component\u0103 sl\u0103bit\u0103 sau de o montare excentric\u0103, \u00eencovoierea arborelui reprezint\u0103 o deformare real\u0103 a materialului arborelui \u00eensu\u0219i. Aceasta produce <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration\/\">vibra\u021bii<\/a> simptome care seam\u0103n\u0103 superficial <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> \u2014 mi\u0219care puternic\u0103, sincron\u0103, o dat\u0103 per rota\u021bie \u2014 dar care nu poate fi remediat\u0103 prin <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a>. Recunoa\u0219terea acestei distinc\u021bii din timp este ceea ce desparte o repara\u021bie rapid\u0103 de zile \u00eentregi de echilibr\u0103ri inutile pe un arbore care nu avea niciodat\u0103 s\u0103 r\u0103spund\u0103.<\/p>\n<h2>1. Defini\u021bie: ce este cu adev\u0103rat \u00eencovoierea arborelui<\/h2>\n<p>Un rotor perfect s\u0103n\u0103tos are o ax\u0103 a masei \u0219i o ax\u0103 geometric\u0103 ambele drepte \u0219i aproape coincidente. \u00cencovoierea arborelui distruge aceast\u0103 imagine prin curbarea axei geometrice \u00eentr-un arc. Curbura poate fi mic\u0103 \u2014 c\u00e2teva sutimi de milimetru sunt suficiente pentru a conta la o ma\u0219in\u0103 de mare vitez\u0103 \u2014 dar, deoarece linia central\u0103 \u00eencovoiat\u0103 nu mai trece prin centrele lag\u0103relor, rotorul este for\u021bat s\u0103 se roteasc\u0103 \u00een jurul unei linii \u00een jurul c\u0103reia nu dore\u0219te \u00een mod natural s\u0103 se \u00eenv\u00e2rt\u0103.<\/p>\n<p>Merit\u0103 s\u0103 separ\u0103m \u00eencovoierea de rudele sale apropiate. O <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bent-shaft\/\">arbore \u00eendoit<\/a> este \u00een esen\u021b\u0103 acela\u0219i defect descris din perspectiv\u0103 mecanic\u0103, \u00een timp ce <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/eccentricity\/\">excentricitate<\/a> descrie un rotor al c\u0103rui centru de mas\u0103 este deplasat f\u0103r\u0103 ca arborele \u00een sine s\u0103 fie curbat. Adev\u0103rat\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/run-out\/\">b\u0103taie radial\u0103<\/a> poate fi mecanic\u0103 (o abatere geometric\u0103 real\u0103) sau electric\u0103 (o citire fals\u0103 cauzat\u0103 de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/proximity-probe\/\">sond\u0103 de proximitate<\/a> perceperea unei varia\u021bii de material sau magnetice). \u00cencovoierea arborelui este \u00een mod specific o deformare geometric\u0103 a corpului arborelui \u0219i de aceea nicio cantitate de mas\u0103 ad\u0103ugat\u0103 \u00een alt\u0103 parte nu o poate cu adev\u0103rat &#8220;echilibra.&#8221;<\/p>\n<h2>2. Tipuri de \u00eencovoiere a arborelui<\/h2>\n<p>\u00cencovoierea arborelui se clasific\u0103 cel mai bine dup\u0103 cauza sa \u0219i dup\u0103 c\u00e2t timp persist\u0103, deoarece fiecare tip necesit\u0103 o abordare diferit\u0103.<\/p>\n<h3>2.1 \u00cencovoiere mecanic\u0103 permanent\u0103<\/h3>\n<p>Aceasta este o deformare plastic\u0103 (permanent\u0103) a materialului arborelui \u2014 metalul a cedat \u0219i nu va reveni la forma ini\u021bial\u0103. Originile frecvente includ:<\/p>\n<ul>\n<li>Suprasolicitare mecanic\u0103 sau impact<\/li>\n<li>Ridicarea sau manipularea necorespunz\u0103toare \u00een timpul \u00eentre\u021binerii<\/li>\n<li>Cobor\u00e2rea rotorului<\/li>\n<li>Tensiune excesiv\u0103 de \u00eencovoiere \u00een timpul func\u021bion\u0103rii<\/li>\n<li>Defecte de fabrica\u021bie sau tratament termic necorespunz\u0103tor<\/li>\n<\/ul>\n<p>Odat\u0103 ce arborele a cedat, \u00eencovoierea r\u0103m\u00e2ne chiar \u0219i atunci c\u00e2nd arborele este \u00een repaus \u0219i orice sarcin\u0103 exterioar\u0103 a fost \u00eendep\u0103rtat\u0103. Aceasta este semn\u0103tura care diferen\u021biaz\u0103 \u00eencovoierea permanent\u0103 de cea termic\u0103: este prezent\u0103 la rece \u0219i este prezent\u0103 pe bancul de lucru.<\/p>\n<h3>2.2 Deformare termic\u0103 (tranzitorie)<\/h3>\n<p>Numit \u0219i <strong>arc termic<\/strong> sau <strong>curbur\u0103 la cald<\/strong>, aceasta este o stare temporar\u0103 cauzat\u0103 de \u00eenc\u0103lzirea neuniform\u0103 \u00een jurul circumferin\u021bei arborelui. Partea mai cald\u0103 se dilat\u0103 mai mult dec\u00e2t partea mai rece, for\u021b\u00e2nd arborele s\u0103 se curbeze, cu partea cald\u0103 pe fa\u021ba convex\u0103 (exterioar\u0103). Factorii declan\u0219atori tipici sunt:<\/p>\n<ul>\n<li>Surse de c\u0103ldur\u0103 asimetrice (fluid de proces fierbinte pe o parte, aer de r\u0103cire pe cealalt\u0103)<\/li>\n<li>\u00cenc\u0103lzirea prin frecare a rulmentului pe o parte a arborelui<\/li>\n<li>Frecare a rotorului gener\u00e2nd \u00eenc\u0103lzire localizat\u0103<\/li>\n<li>\u00cenc\u0103lzire solar\u0103 pe echipamente exterioare<\/li>\n<li>Proceduri de \u00eenc\u0103lzire necorespunz\u0103toare pentru turbinele mari<\/li>\n<\/ul>\n<p>\u00cencovoierea termic\u0103 dispare \u00een mod normal odat\u0103 ce arborele se r\u0103ce\u0219te uniform sau atinge echilibrul termic. Mecanismul complet, prevenirea \u0219i practica de utilizare a angrenajului de rotire sunt tratate \u00een detaliu la <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/thermal-bow\/\">arc termic<\/a>. Avertismentul important aici este c\u0103 ciclurile repetate de \u00eencovoiere termic\u0103 pot \u00een cele din urm\u0103 \u00eempinge un arbore dincolo de limita sa de curgere \u0219i pot l\u0103sa o deformare permanent\u0103 \u2014 astfel \u00eenc\u00e2t o problem\u0103 &#8220;temporar\u0103&#8221; ignorat\u0103 suficient de mult timp devine una permanent\u0103.<\/p>\n<h3>2.3 Deformare prin tensiuni reziduale<\/h3>\n<p>Tensiunile interne reziduale l\u0103sate de sudur\u0103, tratamentul termic sau prelucrarea mecanic\u0103 pot determina un arbore s\u0103 se \u00eencovoaie lent \u00een timp, \u00een special atunci c\u00e2nd temperaturile de func\u021bionare sau sarcinile de exploatare permit relaxarea acelor tensiuni blocate. Acest tip de \u00eencovoiere poate ap\u0103rea la luni sau ani dup\u0103 punerea \u00een func\u021biune, ceea ce face utile verific\u0103rile periodice ale rectilinit\u0103\u021bii pe rotoarele critice.<\/p>\n<h2>3. Cauzele \u00eencovoierii arborelui<\/h2>\n<p>\u00cen\u021belegerea cauzei profunde previne at\u00e2t reapari\u021bia, c\u00e2t \u0219i indic\u0103 corec\u021bia potrivit\u0103. Factorii determinan\u021bi se \u00eempart \u00een trei familii.<\/p>\n<h3>3.1 Cauze mecanice<\/h3>\n<ul>\n<li><strong>Suprasarcin\u0103:<\/strong> func\u021bion\u00e2nd la sarcini care dep\u0103\u0219esc limitele de proiectare.<\/li>\n<li><strong>Depozitare necorespunz\u0103toare:<\/strong> depozitarea arborilor \u00een pozi\u021bie orizontal\u0103 f\u0103r\u0103 un suport adecvat, ceea ce permite apari\u021bia \u00een timp a unei s\u0103ge\u021bi prin fluaj \u2014 \u00een special la rotoarele lungi \u0219i suple l\u0103sate luni \u00eentregi pe dou\u0103 suporturi de cap\u0103t.<\/li>\n<li><strong>Manipulare gre\u0219it\u0103:<\/strong> Ridicare prin ax \u00een loc de punctele de ridicare desemnate<\/li>\n<li><strong>Accident sau impact:<\/strong> c\u0103dere, coliziune sau deteriorare cauzat\u0103 de corpuri str\u0103ine.<\/li>\n<li><strong>Blocarea rulmentului:<\/strong> Un rulment blocat poate cauza \u00eendoirea arborelui sub cuplul de ac\u021bionare<\/li>\n<\/ul>\n<h3>3.2 Cauze termice<\/h3>\n<ul>\n<li><strong>\u00cenc\u0103lzire neuniform\u0103:<\/strong> Distribu\u021bie neuniform\u0103 a temperaturii pe circumferin\u021ba arborelui<\/li>\n<li><strong>Varia\u021bii rapide de temperatur\u0103:<\/strong> \u0219oc termic \u00een timpul pornirii sau opririi.<\/li>\n<li><strong>Hot spots:<\/strong> \u00cenc\u0103lzire localizat\u0103 din cauza frec\u0103rii, frec\u0103rilor sau condi\u021biilor de proces<\/li>\n<li><strong>\u00cenc\u0103lzire prealabil\u0103 insuficient\u0103:<\/strong> Pornirea prea rapid\u0103 a turbinelor reci sau a ma\u0219inilor mari<\/li>\n<li><strong>Proceduri de oprire:<\/strong> oprirea rotirii unui arbore fierbinte \u00eenainte ca acesta s\u0103 se r\u0103ceasc\u0103 (s\u0103geat\u0103 termic\u0103).<\/li>\n<\/ul>\n<h3>3.3 Cauze legate de material \u0219i fabrica\u021bie<\/h3>\n<ul>\n<li><strong>Calitate slab\u0103 a materialului:<\/strong> incluziuni, goluri sau neomogenit\u0103\u021bi ale materialului.<\/li>\n<li><strong>Tratament termic necorespunz\u0103tor:<\/strong> tensiuni reziduale provenite din c\u0103lire sau revenire.<\/li>\n<li><strong>Deformarea prin sudare:<\/strong> sudarea asimetric\u0103 gener\u00e2nd tensiuni reziduale.<\/li>\n<li><strong>Tensiuni de prelucrare mecanic\u0103:<\/strong> tensiuni induse \u00een timpul fabrica\u021biei care se relaxeaz\u0103 \u00een exploatare.<\/li>\n<\/ul>\n<h2>4. Cum provoac\u0103 vibra\u021bii s\u0103geata arborelui<\/h2>\n<p>Un arbore \u00eencovoiat genereaz\u0103 vibra\u021bii prin dou\u0103 mecanisme distincte, dar care ac\u021bioneaz\u0103 conjugat.<\/p>\n<h3>4.1 Dezechilibru geometric<\/h3>\n<p>Atunci c\u00e2nd un arbore \u00eencovoiat se rote\u0219te, axa sa central\u0103 curbat\u0103 descrie un con sau o alt\u0103 traiectorie necircular\u0103. Chiar dac\u0103 distribu\u021bia masei rotorului este perfect uniform\u0103, geometria \u00eencovoiat\u0103 se comport\u0103 ca o mas\u0103 rotativ\u0103 excentric\u0103: deplaseaz\u0103 centrul de greutate \u00een afara axei de rota\u021bie \u0219i genereaz\u0103 o <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/centrifugal-force\/\">for\u021b\u0103 centrifug\u0103<\/a> care cre\u0219te cu p\u0103tratul tura\u021biei, produc\u00e2nd vibra\u021bii 1\u00d7 puternice la <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/running-speed\/\">vitez\u0103 de func\u021bionare<\/a>. Tocmai de aceea s\u0103geata se manifest\u0103 \u00een spectru asemenea unui dezechilibru.<\/p>\n<h3>4.2 Solicitarea prin moment a lag\u0103relor<\/h3>\n<p>Curbura impune, de asemenea, un moment de \u00eencovoiere static \u0219i rotativ care este transmis direct \u00een lag\u0103re, provoc\u00e2nd sarcini variabile \u00een lag\u0103re \u0219i vibra\u021bii la nivelul loca\u0219urilor. La rotoarele mai mari, aceast\u0103 solicitare prin moment este cea care determin\u0103 uzura accelerat\u0103 a lag\u0103relor \u0219i, \u00een cazuri extreme, contactul dintre rotor \u0219i etan\u0219\u0103rile fixe. Un rotor puternic \u00eencovoiat a c\u0103rui s\u0103geat\u0103 se afl\u0103 \u00een apropierea unei <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/critical-speed\/\">vitez\u0103 critic\u0103<\/a> poate produce un r\u0103spuns amplificat, uneori alarmant, la accelerare.<\/p>\n<h2>5. Detectarea \u00eencovoierii arborelui<\/h2>\n<p>Deoarece s\u0103geata \u0219i dezechilibrul real de mas\u0103 au aceea\u0219i semn\u0103tur\u0103 1\u00d7, deosebirea lor reprezint\u0103 esen\u021ba diagnosticului. Cel mai puternic factor de discriminare este comportamentul la tura\u021bii foarte mici \u0219i \u00een timpul varia\u021biilor de temperatur\u0103.<\/p>\n<h3>5.1 Compara\u021bie simptome: \u00eencovoiere vs. dezechilibru<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Caracteristic\u0103<\/th>\n<th>Dezechilibru<\/th>\n<th>Curbura arborelui<\/th>\n<\/tr>\n<tr>\n<td>Frecven\u021ba vibra\u021biilor<\/td>\n<td>1\u00d7 vitez\u0103 de rulare<\/td>\n<td>1\u00d7 vitez\u0103 de rulare<\/td>\n<\/tr>\n<tr>\n<td>Rela\u021bia de faz\u0103<\/td>\n<td>Consistent, acela\u0219i \u00een orice moment<\/td>\n<td>Se poate schimba \u00een timpul \u00eenc\u0103lzirii<\/td>\n<\/tr>\n<tr>\n<td>Vibra\u021bii lente de rulare<\/td>\n<td>Prezent (propor\u021bional cu viteza\u00b2)<\/td>\n<td>Prezent \u0219i adesea semnificativ chiar \u0219i la vitez\u0103 foarte mic\u0103<\/td>\n<\/tr>\n<tr>\n<td>R\u0103spuns la echilibrare<\/td>\n<td>Vibra\u021bii reduse prin echilibrare corect\u0103<\/td>\n<td>\u00cembun\u0103t\u0103\u021bire minim\u0103 sau deloc; se poate agrava<\/td>\n<\/tr>\n<tr>\n<td>Sensibilitate termic\u0103<\/td>\n<td>Relativ stabil \u00een func\u021bie de temperatur\u0103<\/td>\n<td>Modific\u0103ri semnificative \u00een timpul \u00eenc\u0103lzirii\/r\u0103cirii<\/td>\n<\/tr>\n<tr>\n<td>M\u0103surarea b\u0103t\u0103ii<\/td>\n<td>Sc\u0103zut c\u00e2nd rotorul este \u00een repaus<\/td>\n<td>B\u0103taie mare chiar \u0219i \u00een repaus (curbur\u0103 permanent\u0103)<\/td>\n<\/tr>\n<\/table>\n<p>R\u00e2ndul cel mai elocvent este linia rotirii lente. For\u021ba de dezechilibru se reduce spre zero pe m\u0103sur\u0103 ce tura\u021bia scade, deoarece este propor\u021bional\u0103 cu p\u0103tratul tura\u021biei; o s\u0103geat\u0103 permanent\u0103, fiind un decalaj geometric fix, prezint\u0103 \u00een continuare o b\u0103taie radial\u0103 \u0219i o mi\u0219care 1\u00d7 considerabile chiar \u0219i la o rotire foarte lent\u0103. Acesta este testul care departajeaz\u0103 situa\u021bia.<\/p>\n<h3>5.2 Teste de diagnosticare<\/h3>\n<h4>5.2.1 M\u0103surare la tur\u0103 lent\u0103<\/h4>\n<p>Roti\u021bi arborele foarte lent \u2014 de regul\u0103 5\u201310% din tura\u021bia de func\u021bionare \u2014 \u0219i m\u0103sura\u021bi <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/run-out\/\">b\u0103taie radial\u0103<\/a> with a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/proximity-probe\/\">sond\u0103 de proximitate<\/a> sau un ceas comparator. O b\u0103taie radial\u0103 mare la rota\u021bie lent\u0103 indic\u0103 o \u00eencovoiere a arborelui sau o b\u0103taie radial\u0103 mecanic\u0103, mai degrab\u0103 dec\u00e2t un dezechilibru, a c\u0103rui for\u021b\u0103 centrifug\u0103 este neglijabil\u0103 la o vitez\u0103 at\u00e2t de redus\u0103. Vectorul la rota\u021bie lent\u0103 este, de asemenea, \u00eenregistrat, astfel \u00eenc\u00e2t s\u0103 poat\u0103 fi sc\u0103zut din datele de vibra\u021bie \u00een regim de func\u021bionare, izol\u00e2nd r\u0103spunsul dinamic real de componenta de \u00eencovoiere static\u0103.<\/p>\n<h4>5.2.2 Defazaj la oprire<\/h4>\n<p>Monitoriza\u021bi vibra\u021biile <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase-angle\/\">unghi de faz\u0103<\/a> pe m\u0103sur\u0103 ce ma\u0219ina decelereaz\u0103 liber. Dezechilibrul real men\u021bine o valoare constant\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase\/\">faz\u0103<\/a> indiferent de vitez\u0103 (departe de rezonan\u021b\u0103). Un arbore \u00eencovoiat termic tinde s\u0103 prezinte o faz\u0103 care deriveaz\u0103 pe m\u0103sur\u0103 ce rotorul se r\u0103ce\u0219te, iar reprezentarea grafic\u0103 simultan\u0103 a amplitudinii \u0219i a fazei pe un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bode-plot\/\">Diagrama Bode<\/a> sau <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/polar-plot\/\">grafic polar<\/a> face ca diferen\u021ba s\u0103 fie mult mai u\u0219or de interpretat dec\u00e2t cifrele brute.<\/p>\n<h4>5.2.3 Test de \u00eencovoiere termic\u0103<\/h4>\n<p>\u00cen cazul unei suspiciuni de \u00eencovoiere termic\u0103, monitoriza\u021bi vibra\u021bia pe parcursul pornirii \u0219i al \u00eenc\u0103lzirii. \u00cencovoierea termic\u0103 prezint\u0103 de obicei vibra\u021bii care <em>increasing<\/em> pe m\u0103sur\u0103 ce ma\u0219ina se \u00eenc\u0103lze\u0219te, apoi se stabilizeaz\u0103 sau scad odat\u0103 ce se atinge echilibrul termic \u2014 imaginea \u00een oglind\u0103 a unui defect care cre\u0219te exclusiv odat\u0103 cu viteza.<\/p>\n<h4>5.2.4 Verificarea b\u0103t\u0103ii radiale \u00een afara ma\u0219inii<\/h4>\n<p>Demonta\u021bi rotorul, sprijini\u021bi-l pe prisme \u00een V sau \u00eentre v\u00e2rfurile strungului \u0219i roti\u021bi-l lent \u00een timp ce m\u0103sura\u021bi b\u0103taia radial\u0103 cu un ceas comparator. O b\u0103taie radial\u0103 semnificativ\u0103 \u2014 de obicei mai mare de 0,001 in (25 \u00b5m) \u2014 confirm\u0103 o \u00eencovoiere permanent\u0103. Aceast\u0103 verificare pe banc este dovada definitiv\u0103, deoarece un arbore care apare drept pe ma\u0219in\u0103, dar \u00eencovoiat pe prismele \u00een V spune o cu totul alt\u0103 poveste dec\u00e2t unul care este \u00eencovoiat \u00een ambele cazuri.<\/p>\n<h4>5.2.5 Inspec\u021bie vizual\u0103<\/h4>\n<p>La arborii de dimensiuni mari, vizarea de-a lungul arborelui sau utilizarea unor metode optice precum echipamentul de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/laser-shaft-alignment\/\">aliniere laser<\/a> poate dezv\u0103lui o \u00eencovoiere evident\u0103 pe care ochiul singur ar putea s\u0103 nu o observe.<\/p>\n<h2>6. Metode de corectare<\/h2>\n<p>Corectarea potrivit\u0103 depinde de gravitatea \u0219i de tipul \u00eencovoierii. Nu exist\u0103 o solu\u021bie unic\u0103, valabil\u0103 pentru fiecare caz.<\/p>\n<h3>6.1 Pentru \u00eencovoierea mecanic\u0103 permanent\u0103<\/h3>\n<h4>6.1.1 \u00cendreptarea arborelui<\/h4>\n<p>Pentru o \u00eencovoiere u\u0219oar\u0103 p\u00e2n\u0103 la moderat\u0103 \u2014 de obicei sub 0,005 in (125 \u00b5m) \u2014 arborele poate fi uneori \u00eendreptat la rece sau la cald cu prese hidraulice. Arborele este sprijinit \u0219i supra-\u00eendoit cu aten\u021bie astfel \u00eenc\u00e2t s\u0103 se deformeze plastic \u00eenapoi spre starea dreapt\u0103, un proces care necesit\u0103 echipamente specializate, tehnicieni califica\u021bi \u0219i r\u0103bdare, \u00eentruc\u00e2t o supra-corectare creeaz\u0103 pur \u0219i simplu o \u00eencovoiere \u00een direc\u021bia opus\u0103.<\/p>\n<h4>6.1.2 Eliminarea tensiunilor termice<\/h4>\n<p>Tratamentul termic al arborelui pentru detensionarea tensiunilor reziduale poate reduce sau elimina \u00eencovoierea provenit\u0103 din tensiunile blocate de fabrica\u021bie sau de sudur\u0103. Aceasta necesit\u0103 echipamente de cuptor adecvate \u0219i un control riguros al procesului, pentru a evita introducerea unor deform\u0103ri noi.<\/p>\n<h4>6.1.3 \u00cenlocuirea arborelui<\/h4>\n<p>\u00cen cazul unei \u00eencovoieri severe sau \u00een aplica\u021bii critice, \u00eenlocuirea este adesea solu\u021bia cea mai fiabil\u0103. Costul unui arbore nou trebuie pus \u00een balan\u021b\u0103 cu timpul de nefunc\u021bionare \u0219i cu riscul real ca o \u00eencercare de \u00eendreptare s\u0103 e\u0219ueze sau s\u0103 revin\u0103 la starea ini\u021bial\u0103 \u00een timp.<\/p>\n<h4>6.1.4 &#8220;Echilibrarea \u00een jurul \u00eencovoierii&#8221;<\/h4>\n<p>\u00cen unele cazuri \u2014 \u00een special la turbinele mari \u2014 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/correction-weight\/\">ponderi de corec\u021bie<\/a> poate fi calculat\u0103 \u0219i montat\u0103 pentru a contracara <em>effect<\/em> \u00eencovoierii la tura\u021bia de func\u021bionare. Aceasta nu \u00eendreapt\u0103 arborele; doar anuleaz\u0103 for\u021ba de ordinul 1\u00d7 produs\u0103 de \u00eencovoiere. Este o m\u0103sur\u0103 limitat\u0103, \u00een general temporar\u0103, \u0219i las\u0103 un rotor a c\u0103rui <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/residual-unbalance\/\">dezechilibru rezidual<\/a> pare acceptabil\u0103 doar la o anumit\u0103 tura\u021bie \u0219i temperatur\u0103.<\/p>\n<h3>6.2 Pentru \u00eencovoierea termic\u0103<\/h3>\n<h4>6.2.1 Modific\u0103ri ale procedurii de operare<\/h4>\n<ul>\n<li>Implementa\u021bi proceduri lente, etapizate de \u00eenc\u0103lzire.<\/li>\n<li>Men\u021bine\u021bi func\u021bionarea continu\u0103 a angrenajului de rota\u021bie \u00een timpul opririi pentru a preveni curgerea termic\u0103<\/li>\n<li>Controla\u021bi mai atent admisia de abur sau temperaturile fluidului de proces<\/li>\n<li>Asigura\u021bi o \u00eenc\u0103lzire \u0219i o r\u0103cire simetrice.<\/li>\n<\/ul>\n<h4>6.2.2 Modific\u0103ri de proiectare<\/h4>\n<ul>\n<li>Ad\u0103uga\u021bi izola\u021bie pentru a reduce gradien\u021bii termici.<\/li>\n<li>Instala\u021bi man\u0219oane de \u00eenc\u0103lzire pentru o \u00eenc\u0103lzire uniform\u0103.<\/li>\n<li>\u00cembun\u0103t\u0103\u021bi\u021bi sistemul de r\u0103cire pentru a uniformiza distribu\u021bia temperaturii.<\/li>\n<\/ul>\n<h4>6.2.3 Func\u021bionarea mecanismului de virare<\/h4>\n<p>La turbinele mari, ac\u021bionarea mecanismului de virare (un sistem de rota\u021bie la tura\u021bie redus\u0103) \u00een timpul \u00eenc\u0103lzirii \u0219i al r\u0103cirii men\u021bine arborele \u00een rota\u021bie, astfel \u00eenc\u00e2t c\u0103ldura s\u0103 fie distribuit\u0103 uniform pe circumferin\u021b\u0103, prevenind gradientul care altfel ar \u00eencovoia rotorul.<\/p>\n<h2>7. Verificarea rotorului pe teren<\/h2>\n<p>Dup\u0103 ce un arbore a fost \u00eendreptat, \u00eenlocuit sau apreciat ca fiind suficient de drept pentru func\u021bionare, rotorul trebuie totu\u0219i verificat dinamic \u00een propriile lag\u0103re \u2014 b\u0103taia radial\u0103 m\u0103surat\u0103 la banc nu dovede\u0219te singur\u0103 c\u0103 va func\u021biona lin la tura\u021bie. Un analizor portabil cu dou\u0103 canale, cum este <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> face acest lucru practic pe teren: capteaz\u0103 vectorul la rota\u021bie lent\u0103, apoi m\u0103soar\u0103 vibra\u021bia de ordinul 1\u00d7 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase\/\">amplitudine \u0219i faz\u0103<\/a> pe \u00eentregul domeniu de tura\u021bii, astfel \u00eenc\u00e2t un inginer s\u0103 poat\u0103 separa orice component\u0103 de \u00eencovoiere r\u0103mas\u0103 de dezechilibrul real de mas\u0103. Numai dup\u0103 ce b\u0103taia radial\u0103 la rota\u021bie lent\u0103 confirm\u0103 c\u0103 arborele este acceptabil de drept are sens s\u0103 se treac\u0103 la o echilibrare de finisare <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> \u2014 moment \u00een care acela\u0219i instrument calculeaz\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/influence-coefficient\/\">coeficien\u021bi de influen\u021b\u0103<\/a> \u0219i verific\u0103 rezultatul final \u00een raport cu un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/iso-21940-11\/\">ISO 21940-11<\/a> grad de echilibrare. Pute\u021bi precalcula acea valoare admisibil\u0103 a dezechilibrului rezidual cu ajutorul <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/residual-unbalance-iso1940\/\">Calculator de dezechilibru rezidual (ISO 21940-11)<\/a> \u00eenainte de a \u00eencepe.<\/p>\n<h2>8. Strategii de prevenire<\/h2>\n<p>Prevenirea \u00eencovoierii arborelui este mult mai ieftin\u0103 \u0219i mai rapid\u0103 dec\u00e2t corectarea acesteia.<\/p>\n<h3>8.1 Proiectare \u0219i fabrica\u021bie<\/h3>\n<ul>\n<li>Utiliza\u021bi proceduri corecte de tratament termic pentru a reduce la minimum tensiunile reziduale.<\/li>\n<li>Proiecta\u021bi o rigiditate adecvat\u0103 a arborelui pentru aplica\u021bie<\/li>\n<li>Specifica\u021bi materiale adecvate mediului termic.<\/li>\n<\/ul>\n<h3>8.2 Instalare \u0219i \u00eentre\u021binere<\/h3>\n<ul>\n<li>Ridica\u021bi \u00eentotdeauna rotoarele folosind punctele de ridicare desemnate, niciodat\u0103 de ax<\/li>\n<li>Depozita\u021bi rotoarele de rezerv\u0103 cu un sprijin adecvat pentru a preveni \u00eencovoierea \u2014 ideal rotite periodic sau sprijinite \u00een apropierea fusurilor.<\/li>\n<li>Evita\u021bi \u0219ocurile mecanice \u00een timpul manipul\u0103rii.<\/li>\n<li>Verifica\u021bi periodic rectilinitatea arborelui (anual sau conform programului produc\u0103torului&#8217;).<\/li>\n<\/ul>\n<h3>8.3 Exploatare<\/h3>\n<ul>\n<li>Respecta\u021bi procedurile de \u00eenc\u0103lzire \u0219i de oprire ale produc\u0103torului&#8217;.<\/li>\n<li>Evita\u021bi varia\u021biile rapide de temperatur\u0103.<\/li>\n<li>Monitoriza\u021bi semnele de \u00eencovoiere termic\u0103 \u00een timpul porniri lor.<\/li>\n<li>Investiga\u021bi prompt orice modificare neexplicat\u0103 a fazei vibra\u021biei.<\/li>\n<\/ul>\n<h2>9. Impactul asupra procedurilor de echilibrare<\/h2>\n<p>\u00cencercarea de a echilibra un arbore \u00eencovoiat este \u00een general inutil\u0103 \u0219i poate fi chiar contraproductiv\u0103:<\/p>\n<ul>\n<li><strong>Corec\u021bii ineficiente:<\/strong> greut\u0103\u021bile calculate pentru dezechilibrul masic nu pot corecta o \u00eencovoiere geometric\u0103.<\/li>\n<li><strong>Mascarea problemei:<\/strong> echilibrarea par\u021bial &#8220;reu\u0219it\u0103&#8221; a unui arbore \u00eencovoiat poate reduce vibra\u021bia pentru scurt timp, l\u0103s\u00e2nd \u00eens\u0103 defectul real \u2014 \u0219i \u00eenc\u0103rcarea lag\u0103relor \u2014 neatins.<\/li>\n<li><strong>Wasted time:<\/strong> rul\u0103rile repetate de echilibrare care refuz\u0103 s\u0103 convearg\u0103 sunt \u00een sine un semnal de alarm\u0103 pentru \u00eencovoiere.<\/li>\n<li><strong>Deteriorare poten\u021bial\u0103:<\/strong> ad\u0103ugarea unor greut\u0103\u021bi de corec\u021bie mari pe un arbore \u00eencovoiat cre\u0219te tensiunile \u0219i poate provoca deterior\u0103ri suplimentare sau chiar fisuri de oboseal\u0103.<\/li>\n<\/ul>\n<p><strong>Cea mai bun\u0103 practic\u0103:<\/strong> verifica\u021bi \u00eentotdeauna \u00eencovoierea arborelui \u00eenainte de a \u00eencepe echilibrarea, mai ales dac\u0103 rotorul are un istoric de manipulare brutal\u0103, evenimente termice sau vibra\u021bii pe care nimeni nu le-a putut explica. O verificare prin rotire lent\u0103 de dou\u0103 minute v\u0103 poate scuti de o dup\u0103-amiaz\u0103 irosit\u0103 \u0219i de un arbore deteriorat.<\/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 curbura arborelui, o curbur\u0103 permanent\u0103 sau temporar\u0103 a arborelui rotorului care provoac\u0103 simptome de vibra\u021bii similare cu dezechilibrul, dar necesit\u0103 abord\u0103ri diferite de diagnosticare \u0219i corec\u021bie.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-232","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/232","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\/232\/revisions"}],"predecessor-version":[{"id":101458,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/232\/revisions\/101458"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}