{"id":268,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/thermal-bow\/"},"modified":"2026-05-23T23:06:51","modified_gmt":"2026-05-23T23:06:51","slug":"thermal-bow","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/thermal-bow\/","title":{"rendered":"Ce este curbura termic\u0103? \u00cendoirea arborelui indus\u0103 de temperatur\u0103"},"content":{"rendered":"<h1>\u00cen\u021belegerea \u00eencovoierii termice la 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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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\/268?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, 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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\/268?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\" 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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, 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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\/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\/268?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\/268?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>Arc termic<\/strong> (numit\u0103 \u0219i curbur\u0103 fierbinte, \u00eendoire termic\u0103 sau curbur\u0103 a arborelui indus\u0103 de temperatur\u0103) este o curbur\u0103 temporar\u0103 care se dezvolt\u0103 \u00eentr-un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor\/\">rotor<\/a> arborele atunci c\u00e2nd temperatura nu este uniform\u0103 pe toat\u0103 circumferin\u021ba sa. Atunci c\u00e2nd o parte a arborelui se \u00eenc\u0103lze\u0219te mai mult dec\u00e2t partea opus\u0103, partea fierbinte se dilat\u0103 mai mult, se alunge\u0219te \u0219i for\u021beaz\u0103 arborele s\u0103 formeze un arc, partea fierbinte afl\u00e2ndu-se pe fa\u021ba convex\u0103 (extern\u0103) a curbei. Spre deosebire de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/shaft-bow\/\">\u00eencovoierea arborelui<\/a> \u00een urma unei deterior\u0103ri mecanice, curbura termic\u0103 este reversibil\u0103: aceasta dispare pe m\u0103sur\u0103 ce arborele revine la o temperatur\u0103 uniform\u0103. Cu toate acestea, poate provoca <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration\/\">vibra\u021bii<\/a> \u00een timpul pornirii \u0219i al r\u0103cirii, iar dac\u0103 este intens\u0103 sau se repet\u0103 la nesf\u00e2r\u0219it, poate provoca deterior\u0103ri permanente.<\/p>\n<h2>1. Defini\u021bie: Ce este curbura termic\u0103<\/h2>\n<p>Curbura termic\u0103 poate fi considerat\u0103 cel mai bine ca o deformare geometric\u0103 tranzitorie. Arborele nu s-a deformat plastic \u0219i nu exist\u0103 nicio problem\u0103 cu distribu\u021bia masei sale; pur \u0219i simplu este \u00eendoit, \u00een timp real, de un gradient de temperatur\u0103 pe diametrul s\u0103u. Deoarece \u00eendoirea este geometric\u0103 \u0219i se rote\u0219te odat\u0103 cu arborele, vibra\u021bia rezultat\u0103 se situeaz\u0103 la <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/running-speed\/\">vitez\u0103 de func\u021bionare<\/a> \u0219i, pe o scar\u0103, arat\u0103 aproape exact ca <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a>. Diferen\u021ba esen\u021bial\u0103 const\u0103 \u00een faptul c\u0103 curbura termic\u0103 apare \u0219i dispare odat\u0103 cu varia\u021biile de temperatur\u0103, \u00een timp ce dezechilibrul este fix. Acest singur indiciu comportamental \u2014 vibra\u021bia care reflect\u0103 starea termic\u0103 a ma\u0219inii, mai degrab\u0103 dec\u00e2t viteza acesteia \u2014 este firul conductor care dezv\u0103luie \u00eentregul diagnostic.<\/p>\n<h2>2. Mecanismul fizic<\/h2>\n<h3>2.1 Diferen\u021ba de dilatare termic\u0103<\/h3>\n<p>Fizica din spatele \u00eencovoierii termice este simpl\u0103:<\/p>\n<ul>\n<li>Metalul se dilat\u0103 la \u00eenc\u0103lzire (coeficientul de dilatare termic\u0103 este, de obicei, de 10\u201315 \u00b5m\/m\/\u00b0C pentru o\u021bel).<\/li>\n<li>Dac\u0103 temperatura este uniform\u0103 pe toat\u0103 circumferin\u021ba, dilatarea este simetric\u0103 \u2014 arborele se alunge\u0219te pur \u0219i simplu, dar r\u0103m\u00e2ne drept.<\/li>\n<li>Dac\u0103 o parte este mai fierbinte, acea parte se dilat\u0103 mai mult dec\u00e2t partea rece<\/li>\n<li>Expansiunea diferen\u021bial\u0103 determin\u0103 o curbur\u0103.<\/li>\n<li>Amplitudinea curburii este propor\u021bional\u0103 at\u00e2t cu diferen\u021ba de temperatur\u0103, c\u00e2t \u0219i cu lungimea arborelui.<\/li>\n<\/ul>\n<p>Acela\u0219i coeficient care determin\u0103 acest gradient st\u0103 la baza cre\u0219terii axiale \u0219i a modific\u0103rilor de ajustare calculate de ingineri \u00een alte contexte; calculele matematice care stau la baza acestuia sunt identice cu cele dintr-un <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/thermal-expansion-calculator\/\">Calculator de dilatare termic\u0103<\/a>, aplicat\u0103 pe diametru, nu pe lungime.<\/p>\n<h3>2.2 Diferen\u021be tipice de temperatur\u0103<\/h3>\n<ul>\n<li>O diferen\u021b\u0103 de temperatur\u0103 de 10\u201320 \u00b0C pe diametru poate genera o curbur\u0103 vizibil\u0103.<\/li>\n<li>\u00cen cazul turbinelor de mari dimensiuni, o diferen\u021b\u0103 de temperatur\u0103 de 30\u201350 \u00b0C poate provoca vibra\u021bii puternice.<\/li>\n<li>Efectul se acumuleaz\u0103 pe toat\u0103 lungimea arborelui, astfel \u00eenc\u00e2t arborii mai lungi sunt, prin natura lor, mai vulnerabili.<\/li>\n<\/ul>\n<h2>3. Cauze frecvente ale curburii termice<\/h2>\n<h3>3.1 Condi\u021bii de pornire (cele mai frecvente)<\/h3>\n<ul>\n<li><strong>\u00cenc\u0103lzire asimetric\u0103:<\/strong> aburul fierbinte, gazul sau fluidul de proces intr\u0103 \u00een contact cu partea superioar\u0103 a arborelui, \u00een timp ce partea inferioar\u0103 r\u0103m\u00e2ne mai rece.<\/li>\n<li><strong>\u00cenc\u0103lzire prin radia\u021bie:<\/strong> C\u0103ldura provenit\u0103 de la carcasele fierbin\u021bi sau de la conductele calde \u00eenc\u0103lze\u0219te partea superioar\u0103 a arborelui.<\/li>\n<li><strong>Fric\u021biunea rulmentului:<\/strong> un rulment care se \u00eenc\u0103lze\u0219te mai mult dec\u00e2t celelalte \u00eenc\u0103lze\u0219te sec\u021biunea local\u0103 a arborelui.<\/li>\n<li><strong>Rapid startup:<\/strong> Un timp de \u00eenc\u0103lzire insuficient permite formarea gradientelor termice \u00eenainte ca acestea s\u0103 se echilibreze.<\/li>\n<\/ul>\n<h3>3.2 Condi\u021bii de oprire (deflexiune termic\u0103 prin gravita\u021bie)<\/h3>\n<ul>\n<li><strong>Hot shutdown:<\/strong> arborele se opre\u0219te din rotire \u00een timp ce este \u00eenc\u0103 fierbinte.<\/li>\n<li><strong>Deformare gravita\u021bional\u0103:<\/strong> c\u0103ldura se ridic\u0103, astfel c\u0103 partea superioar\u0103 a unui arbore orizontal se r\u0103ce\u0219te mai repede dec\u00e2t cea inferioar\u0103.<\/li>\n<li><strong>\u00cencovoiere prin deflexiune termic\u0103:<\/strong> partea de jos r\u0103m\u00e2ne fierbinte mai mult timp, astfel \u00eenc\u00e2t arborele se \u00eencoaie \u00een jos.<\/li>\n<li><strong>Perioada critic\u0103:<\/strong> \u00een primele c\u00e2teva ore dup\u0103 oprire.<\/li>\n<\/ul>\n<h3>3.3 Cauze opera\u021bionale<\/h3>\n<ul>\n<li><strong>Frecare \u00eentre rotor \u0219i stator:<\/strong> frecarea generat\u0103 de contact produce o \u00eenc\u0103lzire local\u0103 intens\u0103 \u2014 un mecanism de auto-amplificare analizat \u00een cadrul <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-rub\/\">frecare rotor<\/a>.<\/li>\n<li><strong>R\u0103cire neuniform\u0103:<\/strong> un flux asimetric de aer de r\u0103cire sau pulverizare de ap\u0103.<\/li>\n<li><strong>Solar heating:<\/strong> echipamente amplasate \u00een exterior, cu o parte expus\u0103 la soare.<\/li>\n<li><strong>Perturb\u0103ri de proces:<\/strong> schimb\u0103ri bru\u0219te de temperatur\u0103 ale fluidului de lucru.<\/li>\n<\/ul>\n<p>Cazul frec\u0103rii necesit\u0103 o aten\u021bie special\u0103. O frecare u\u0219oar\u0103 \u00eenc\u0103lze\u0219te un punct, ceea ce deformeaz\u0103 axul, care apas\u0103 mai puternic acel punct \u00eempotriva garniturii, \u00eenc\u0103lzind-o \u0219i mai mult \u2014 un cerc vicios (denumit uneori \u201eefectul Newkirk\u201d) care poate transforma un contact minor \u00eentr-o vibra\u021bie puternic\u0103 \u00een doar c\u00e2teva minute.<\/p>\n<h2>4. Simptome \u0219i depistare<\/h2>\n<h3>4.1 Caracteristicile vibra\u021biilor<\/h3>\n<p>Curbura termic\u0103 produce un set caracteristic de simptome:<\/p>\n<ul>\n<li><strong>Frecven\u0163\u0103:<\/strong> 1\u00d7 viteza de rota\u021bie \u2014 clasic\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/synchronous-vibration\/\">vibra\u021bii sincrone<\/a>.<\/li>\n<li><strong>Sincronizare:<\/strong> ridicat\u0103 \u00een timpul \u00eenc\u0103lzirii, sc\u0103z\u00e2nd odat\u0103 cu atingerea echilibrului termic.<\/li>\n<li><strong>Phase changes:<\/strong> a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase-angle\/\">unghi de faz\u0103<\/a> se modific\u0103 pe m\u0103sur\u0103 ce curbura se formeaz\u0103 \u0219i apoi se rezolv\u0103.<\/li>\n<li><strong>Vibra\u021bie lent\u0103:<\/strong> vibra\u021bii puternice chiar \u0219i la tura\u021bii foarte mici, spre deosebire de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a>.<\/li>\n<li><strong>Aspect:<\/strong> pare a fi un dezechilibru, dar depinde de temperatur\u0103.<\/li>\n<\/ul>\n<h3>4.2 Distingerea curburii termice de 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>\u00cencovoiere termic\u0103<\/th>\n<\/tr>\n<tr>\n<td>Frecven\u021b\u0103<\/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>Sensibilitate la temperatur\u0103<\/td>\n<td>Relativ stabil<\/td>\n<td>Ridicat \u00een timpul \u00eenc\u0103lzirii\/r\u0103cirii<\/td>\n<\/tr>\n<tr>\n<td>Rota\u021bie lent\u0103 (50\u2013200 rota\u021bii pe minut)<\/td>\n<td>Amplitudine foarte mic\u0103<\/td>\n<td>Amplitudine mare<\/td>\n<\/tr>\n<tr>\n<td>Faz\u0103 vs. Temperatur\u0103<\/td>\n<td>Constant\u0103<\/td>\n<td>Se modific\u0103 pe m\u0103sur\u0103 ce curbura se dezvolt\u0103<\/td>\n<\/tr>\n<tr>\n<td>Persisten\u0163\u0103<\/td>\n<td>Constant \u00een orice moment<\/td>\n<td>Temporar, se rezolv\u0103 la echilibru termic<\/td>\n<\/tr>\n<tr>\n<td>R\u0103spuns la echilibrare<\/td>\n<td>Vibra\u021bii reduse<\/td>\n<td>\u00cembun\u0103t\u0103\u021bire minim\u0103 sau deloc<\/td>\n<\/tr>\n<\/table>\n<p>Reprezentarea grafic\u0103 a amplitudinii \u0219i a fazei \u00een func\u021bie de timp \u2014 sau de temperatura rulmentului \u2014 transform\u0103 aceste r\u00e2nduri din tabel \u00eentr-o imagine clar\u0103: un vector care oscileaz\u0103 pe m\u0103sur\u0103 ce rotorul se \u00eenc\u0103lze\u0219te \u0219i apoi se stabilizeaz\u0103 reprezint\u0103 curba termic\u0103, \u00een timp ce un vector care r\u0103m\u00e2ne nemi\u0219cat indic\u0103 un dezechilibru. A <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/polar-plot\/\">grafic polar<\/a> capturat \u00een timpul <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/startup-vibration\/\">pornire<\/a> prezint\u0103 aceast\u0103 migra\u021bie \u00eentr-o privire.<\/p>\n<h3>4.3 Teste de diagnostic<\/h3>\n<h4>4.3.1 Testul de vibra\u021bii cu rulare lent\u0103<\/h4>\n<ul>\n<li>Roti\u021bi arborele la 5\u201310 % din viteza de func\u021bionare.<\/li>\n<li>M\u0103sura\u021bi vibra\u021biile \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/run-out\/\">b\u0103taie radial\u0103<\/a>.<\/li>\n<li>O vibra\u021bie puternic\u0103 la tura\u021bie redus\u0103 indic\u0103 o deformare termic\u0103 sau mecanic\u0103, nu un dezechilibru, a c\u0103rui for\u021b\u0103 este neglijabil\u0103 la o vitez\u0103 at\u00e2t de mic\u0103.<\/li>\n<\/ul>\n<h4>4.3.2 Monitorizarea temperaturii<\/h4>\n<ul>\n<li>Monitoriza\u021bi temperaturile arborelui sau ale rulmen\u021bilor \u00een timpul pornirii, de preferin\u021b\u0103 cu un dispozitiv special <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/temperature-sensor\/\">senzor de temperatur\u0103<\/a> \u00een mai multe r\u00e2nduri.<\/li>\n<li>M\u0103sura\u021bi temperatura \u00een mai multe loca\u021bii \u00een jurul circumferin\u021bei rulmentului<\/li>\n<li>Corela\u021bi varia\u021biile vibra\u021biilor cu gradientele de temperatur\u0103 m\u0103surate.<\/li>\n<\/ul>\n<h4>4.3.3 Evolu\u021bia vibra\u021biilor la pornire<\/h4>\n<ul>\n<li>Reprezenta\u021bi grafic amplitudinea vibra\u021biilor \u00een func\u021bie de timp \u00een timpul \u00eenc\u0103lzirii.<\/li>\n<li>Curba termic\u0103: ini\u021bial ridicat\u0103, apoi \u00een sc\u0103dere pe m\u0103sur\u0103 ce se apropie echilibrul.<\/li>\n<li>Dezechilibru: cre\u0219te odat\u0103 cu viteza \u0219i nu depinde de temperatur\u0103.<\/li>\n<\/ul>\n<h2>5. Strategii de prevenire<\/h2>\n<h3>5.1 Proceduri opera\u021bionale<\/h3>\n<h4>5.1.1 Proceduri corespunz\u0103toare de \u00eenc\u0103lzire<\/h4>\n<ul>\n<li><strong>Cre\u0219terea treptat\u0103 a temperaturii:<\/strong> l\u0103sa\u021bi arborele s\u0103 se \u00eenc\u0103lzeasc\u0103 uniform.<\/li>\n<li><strong>Durat\u0103 prelungit\u0103 a \u00eenc\u0103lzirii:<\/strong> turbinele mari pot avea nevoie de 2\u20134 ore.<\/li>\n<li><strong>Monitorizarea temperaturii:<\/strong> urm\u0103ri\u021bi temperatura rulmen\u021bilor \u0219i a carcasei.<\/li>\n<li><strong>Monitorizarea vibra\u021biilor:<\/strong> urm\u0103ri\u021bi vibra\u021biile \u00een timpul \u00eenc\u0103lzirii \u0219i am\u00e2na\u021bi orice cre\u0219tere a vitezei dac\u0103 acestea sunt intense.<\/li>\n<\/ul>\n<h4>5.1.2 Func\u021bionarea mecanismului de rotire<\/h4>\n<ul>\n<li>\u00cen cazul turbinelor de mari dimensiuni, pune\u021bi \u00een func\u021biune mecanismul de rotire (rotire lent\u0103, aproximativ 3\u201310 rota\u021bii pe minut) \u00een timpul fazelor de \u00eenc\u0103lzire \u0219i r\u0103cire.<\/li>\n<li>Rota\u021bia continu\u0103 previne deformarea termic\u0103 prin distribuirea uniform\u0103 a c\u0103ldurii pe toat\u0103 circumferin\u021ba.<\/li>\n<li>Aceasta este o practic\u0103 standard \u00een industrie pentru turbinele cu abur cu o putere mai mare de 50 MW.<\/li>\n<li>Mecanismul de rotire poate func\u021biona \u00eentre 8 \u0219i 24 de ore \u00een timpul fazei de r\u0103cire.<\/li>\n<\/ul>\n<h4>5.1.3 Proceduri de oprire<\/h4>\n<ul>\n<li><strong>R\u0103cire treptat\u0103:<\/strong> Reduce\u021bi lent sarcina \u0219i temperatura \u00eenainte de oprire<\/li>\n<li><strong>Sistem de rotire extins:<\/strong> men\u021bine\u021bi rotorul \u00een mi\u0219care pe m\u0103sur\u0103 ce se r\u0103ce\u0219te.<\/li>\n<li><strong>Evita\u021bi opririle la cald:<\/strong> Opririle de urgen\u021b\u0103 las\u0103 arborele fierbinte \u0219i predispus la curbur\u0103<\/li>\n<\/ul>\n<h3>5.2 M\u0103suri de proiectare<\/h3>\n<ul>\n<li><strong>Izola\u021bie termic\u0103:<\/strong> izola\u021bi carcasele pentru a men\u021bine o temperatur\u0103 uniform\u0103.<\/li>\n<li><strong>Man\u0219oane de \u00eenc\u0103lzire:<\/strong> \u00eenc\u0103lzitoare externe pentru o pre\u00eenc\u0103lzire uniform\u0103.<\/li>\n<li><strong>Drenaj:<\/strong> pentru a preveni acumularea condensului fierbinte pe fundul arborelui.<\/li>\n<li><strong>Ventilare:<\/strong> asigura\u021bi un flux simetric al aerului de r\u0103cire.<\/li>\n<\/ul>\n<h2>6. Consecin\u021bele deform\u0103rii termice<\/h2>\n<h3>6.1 Efecte imediate<\/h3>\n<ul>\n<li><strong>Vibra\u021bii ridicate:<\/strong> poate atinge valori de 5\u201310 ori mai mari dec\u00e2t cele normale \u00een timpul \u00eenc\u0103lzirii \u0219i cre\u0219te dramatic dac\u0103 arcuirea for\u021beaz\u0103 rotorul s\u0103 treac\u0103 printr-o <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/critical-speed\/\">vitez\u0103 critic\u0103<\/a>.<\/li>\n<li><strong>Sarcina asupra rulmentului:<\/strong> Arcuirea asimetric\u0103 m\u0103re\u0219te sarcinile pe rulmen\u021bi.<\/li>\n<li><strong>Seal rubs:<\/strong> Deformarea arborelui poate cauza contactul cu etan\u0219\u0103rile sau piesele sta\u021bionare<\/li>\n<li><strong>\u00cent\u00e2rzieri la pornire:<\/strong> echipajul trebuie s\u0103 a\u0219tepte ca vibra\u021biile s\u0103 se potoleasc\u0103 \u00eenainte de a m\u0103ri viteza.<\/li>\n<\/ul>\n<h3>6.2 Daune pe termen lung<\/h3>\n<ul>\n<li><strong>Uzura rulmen\u021bilor:<\/strong> vibra\u021biile intense repetate accelereaz\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bearing-wear\/\">uzura rulmen\u021bilor<\/a>.<\/li>\n<li><strong>Seal damage:<\/strong> frec\u0103rile repetate distrug componentele garniturii.<\/li>\n<li><strong>Oboseal\u0103:<\/strong> tensiunea de \u00eencovoiere ciclic\u0103 generat\u0103 de fiecare pornire contribuie la <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/fatigue\/\">oboseal\u0103<\/a> pe durata de via\u021b\u0103 a rotorului.<\/li>\n<li><strong>Permanent set:<\/strong> o deformare termic\u0103 sever\u0103 sau repetat\u0103 poate duce \u00een cele din urm\u0103 la o deformare plastic\u0103 permanent\u0103 \u2014 moment \u00een care o defectare reversibil\u0103 devine permanent\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/shaft-bow\/\">\u00eencovoierea arborelui<\/a>.<\/li>\n<\/ul>\n<h2>7. Corectarea \u0219i atenuarea<\/h2>\n<h3>7.1 Pentru curbura termic\u0103 activ\u0103<\/h3>\n<ul>\n<li><strong>Allow time:<\/strong> A\u0219tepta\u021bi echilibrul termic \u00eenainte de a cre\u0219te viteza<\/li>\n<li><strong>Slow roll:<\/strong> \u00eentoarce\u021bi \u00eencet pentru a redistribui c\u0103ldura acolo unde este posibil.<\/li>\n<li><strong>Nu \u00eencerca\u021bi s\u0103 regla\u021bi echilibrul:<\/strong> <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> nu poate corecta curbura termic\u0103 \u0219i va fi ineficient\u0103.<\/li>\n<li><strong>Remedia\u021bi sursa de c\u0103ldur\u0103:<\/strong> identificarea \u0219i eliminarea \u00eenc\u0103lzirii asimetrice.<\/li>\n<\/ul>\n<h3>7.2 Pentru curbura termic\u0103 prin l\u0103sare (dup\u0103 oprire)<\/h3>\n<ul>\n<li><strong>Mecanism de virare:<\/strong> men\u021bine\u021bi rotorul \u00een mi\u0219care lent\u0103 pe toat\u0103 durata r\u0103cirii.<\/li>\n<li><strong>Durat\u0103 de rulare prelungit\u0103:<\/strong> Poate fi necesar\u0103 func\u021bionarea mecanismului de rotire timp de 12\u201324 de ore.<\/li>\n<li><strong>Monitorizarea temperaturii:<\/strong> continua\u021bi p\u00e2n\u0103 c\u00e2nd temperatura arborelui devine uniform\u0103.<\/li>\n<li><strong>Repornire \u00eent\u00e2rziat\u0103:<\/strong> Dac\u0103 s-a format o curbur\u0103, a\u0219tepta\u021bi \u00eendreptarea natural\u0103 \u00eenainte de a relua lucrul.<\/li>\n<\/ul>\n<h2>8. Aspecte specifice sectorului<\/h2>\n<h3>8.1 Turbine cu abur<\/h3>\n<ul>\n<li>Ma\u0219inile cele mai vulnerabile, din cauza temperaturilor ridicate \u0219i a rotoarelor de mari dimensiuni.<\/li>\n<li>Procedurile detaliate de \u00eenc\u0103lzire \u0219i de r\u0103cire fac parte din practica obi\u0219nuit\u0103.<\/li>\n<li>Sistemul de rotire este obligatoriu pentru unit\u0103\u021bile cu o putere mai mare de 50 MW.<\/li>\n<li>Este posibil s\u0103 fie nevoie de 2\u20134 ore de \u00eenc\u0103lzire \u0219i de 12\u201324 ore de r\u0103cire pe mecanismul de rotire.<\/li>\n<\/ul>\n<h3>8.2 Turbine cu gaz<\/h3>\n<ul>\n<li>R\u0103spuns termic mai rapid datorit\u0103 masei reduse a rotorului.<\/li>\n<li>Curbura termic\u0103 la pornire este mai pu\u021bin frecvent\u0103, dar totu\u0219i posibil\u0103.<\/li>\n<li>\u00cenc\u0103lzirea pe partea de ardere poate genera asimetrii circumferen\u021biale.<\/li>\n<li>Ciclurile de \u00eenc\u0103lzire sunt, de obicei, mai rapide dec\u00e2t \u00een cazul turbinelor cu abur.<\/li>\n<\/ul>\n<h3>8.3 Motoare electrice \u0219i generatoare de mare putere<\/h3>\n<ul>\n<li>Curbura termic\u0103 poate fi cauzat\u0103 de c\u0103ldura generat\u0103 de \u00eenf\u0103\u0219urarea rotorului sau de frecarea rulmen\u021bilor.<\/li>\n<li>Instala\u021biile exterioare sunt expuse la \u00eenc\u0103lzirea solar\u0103 pe o parte.<\/li>\n<li>Poate fi necesar\u0103 rotirea sau \u00eenc\u0103lzirea \u00eenainte de pornire.<\/li>\n<\/ul>\n<h2>9. Monitorizare \u0219i semnalizare<\/h2>\n<h3>9.1 Parametri cheie de monitorizare<\/h3>\n<ul>\n<li><strong>Vibra\u021bie lent\u0103:<\/strong> m\u0103sura\u021bi la vitez\u0103 redus\u0103 \u00eenainte de pornirea normal\u0103.<\/li>\n<li><strong>Diferen\u021ba de temperatur\u0103 a rulmentului:<\/strong> compara\u021bi temperaturile din partea superioar\u0103 cu cele din partea inferioar\u0103.<\/li>\n<li><strong>Vibra\u021biile vs. temperatura:<\/strong> reprezenta\u021bi grafic amplitudinea \u00een func\u021bie de temperatura rulmentului.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase\/\">Unghiul de faz\u0103<\/a>:<\/strong> s\u0103 urm\u0103reasc\u0103 schimb\u0103rile de faz\u0103 care indic\u0103 formarea unei curburi.<\/li>\n<\/ul>\n<h3>9.2 Criterii de alarm\u0103<\/h3>\n<ul>\n<li>O vibra\u021bie lent\u0103 mai mare de dou\u0103 ori dec\u00e2t valoarea de referin\u021b\u0103 declan\u0219eaz\u0103 o alarm\u0103.<\/li>\n<li>O diferen\u021b\u0103 de temperatur\u0103 mai mare de 15\u201320 \u00b0C indic\u0103 un dezechilibru termic.<\/li>\n<li>Schimb\u0103rile rapide de faz\u0103 (peste 30\u00b0 \u00een 10 minute) indic\u0103 formarea unei curburi.<\/li>\n<li>Vibra\u021biile cresc \u00een timpul \u00eenc\u0103lzirii, \u00een loc s\u0103 scad\u0103<\/li>\n<\/ul>\n<p>Aceste criterii se \u00eencadreaz\u0103 \u00een mod firesc \u00eentr-un context mai larg <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/condition-monitoring\/\">monitorizarea st\u0103rii<\/a> program, \u00een cadrul c\u0103ruia sunt \u00eenregistrate datele privind pornirea \u0219i decelerarea ca <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/transient-vibration\/\">vibra\u021bii tranzitorii<\/a> \u00eenregistr\u0103ri, mai degrab\u0103 dec\u00e2t instantanee ale st\u0103rii de echilibru.<\/p>\n<h2>10. Strategii avansate de pornire<\/h2>\n<h3>10.1 Accelerare controlat\u0103<\/h3>\n<ol>\n<li><strong>Rulare lent\u0103 ini\u021bial\u0103:<\/strong> verifica\u021bi dac\u0103 vibra\u021biile sunt acceptabile la 100\u2013200 rpm.<\/li>\n<li><strong>Accelera\u021bie treptat\u0103:<\/strong> cre\u0219te\u021bi treptat viteza p\u00e2n\u0103 la niveluri intermediare (de exemplu, 30%, 50%, 70% din viteza normal\u0103), cu pauze.<\/li>\n<li><strong>Perioade de men\u021binere la temperatur\u0103 constant\u0103:<\/strong> men\u021bine\u021bi o vitez\u0103 constant\u0103 timp de 15\u201330 de minute \u00een fiecare etap\u0103.<\/li>\n<li><strong>Verificarea vibra\u021biilor:<\/strong> Asigura\u021bi-v\u0103 c\u0103 vibra\u021biile scad la fiecare etap\u0103 \u00eenainte de a continua.<\/li>\n<li><strong>Monitorizarea temperaturii:<\/strong> asigura\u021bi-v\u0103 c\u0103 gradientele termice se reduc pe tot parcursul procesului.<\/li>\n<\/ol>\n<h3>10.2 Sisteme de pornire automat\u0103<\/h3>\n<p>Sistemele moderne de control pot automatiza gestionarea deform\u0103rii termice:<\/p>\n<ul>\n<li>Secven\u021be de \u00eenc\u0103lzire programabile.<\/li>\n<li>Perioade de men\u021binere automat\u0103 dac\u0103 se dep\u0103\u0219esc limitele de vibra\u021bii sau temperatur\u0103<\/li>\n<li>Calcularea \u00een timp real a amplitudinii curburii pe baza vibra\u021biilor \u0219i a temperaturii.<\/li>\n<li>Profiluri de vitez\u0103 adaptive bazate pe condi\u021biile m\u0103surate<\/li>\n<\/ul>\n<h2>11. Rela\u021bia cu alte fenomene<\/h2>\n<h3>11.1 Arc termic vs arc permanent<\/h3>\n<ul>\n<li><strong>\u00cencovoiere termic\u0103:<\/strong> este temporar, dispare la atingerea echilibrului termic.<\/li>\n<li><strong>\u00cencovoiere permanent\u0103:<\/strong> deformare plastic\u0103 care persist\u0103 chiar \u0219i atunci c\u00e2nd arborele este rece.<\/li>\n<li><strong>Risc:<\/strong> O deformare termic\u0103 sever\u0103 \u0219i repetat\u0103 poate duce, \u00een cele din urm\u0103, la o deformare permanent\u0103.<\/li>\n<\/ul>\n<h3>11.2 Deformarea termic\u0103 \u0219i echilibrarea<\/h3>\n<ul>\n<li>\u00cencerc\u00e2nd s\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> Echilibrarea unui rotor care prezint\u0103 deformare termic\u0103 este inutil\u0103.<\/li>\n<li>Greut\u0103\u021bile de corec\u021bie calculate pentru starea de \u00eencovoiere vor fi eronate odat\u0103 ce se ajunge la echilibru.<\/li>\n<li>Asigura\u021bi-v\u0103 \u00eentotdeauna c\u0103 rotorul s-a stabilizat termic \u00eenainte de echilibrare.<\/li>\n<li>Curbura termic\u0103 poate ascunde, de asemenea, un dezechilibru real subiacent.<\/li>\n<\/ul>\n<p>Tocmai de aceea, echilibrarea pe teren trebuie s\u0103 a\u0219tepte atingerea unei st\u0103ri termice stabile. Odat\u0103 ce rotorul a atins viteza de regim \u0219i b\u0103taia la rota\u021bie lent\u0103 confirm\u0103 c\u0103 acesta se rote\u0219te uniform, un analizor portabil cu dou\u0103 canale, precum <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> poate m\u0103sura amplitudinea de 1\u00d7 \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase\/\">faz\u0103<\/a>, calcula\u021bi <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/influence-coefficient\/\">coeficien\u021bi de influen\u021b\u0103<\/a>\u0219i verifica\u021bi rezultatul final <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/residual-unbalance\/\">dezechilibru rezidual<\/a> against an <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/iso-21940-11\/\">ISO 21940-11<\/a> grad \u2014 surprinz\u00e2nd adev\u0103rata stare de echilibru la cald pe care o ma\u0219in\u0103 de echilibrare la rece nu o poate detecta niciodat\u0103. Valoarea rezidual\u0103 admisibil\u0103 pentru lucrare poate fi calculat\u0103 \u00een prealabil cu ajutorul <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/residual-unbalance-iso1940\/\">Calculator de dezechilibru rezidual (ISO 21940-11)<\/a>.<\/p>\n<h2>12. Cele mai bune practici \u00een materie de prevenire<\/h2>\n<h3>12.1 Pentru instala\u021bii noi<\/h3>\n<ul>\n<li>Proiecta\u021bi sisteme simetrice de \u00eenc\u0103lzire \u0219i r\u0103cire.<\/li>\n<li>Instala\u021bi un mecanism de rotire pentru echipamentele cu o putere mai mare de 100 kW sau cu un arbore mai lung de 2 metri.<\/li>\n<li>Asigura\u021bi un drenaj adecvat pentru a preveni acumularea de lichide fierbin\u021bi<\/li>\n<li>Izola\u021bi pentru a reduce la minimum transferul de c\u0103ldur\u0103 prin radia\u021bie.<\/li>\n<\/ul>\n<h3>12.2 Pentru echipamentele existente<\/h3>\n<ul>\n<li>Dezvolta\u021bi \u0219i urma\u021bi cu stricte\u021be proceduri scrise de \u00eenc\u0103lzire<\/li>\n<li>Instrui\u021bi operatorii cu privire la riscurile \u0219i simptomele deform\u0103rii termice.<\/li>\n<li>Instala\u021bi sisteme de monitorizare a temperaturii \u00een mai multe loca\u021bii.<\/li>\n<li>Folosi\u021bi analiza tendin\u021belor vibra\u021biilor \u00een timpul pornirii pentru a identifica problemele termice.<\/li>\n<li>\u00cenregistra\u021bi datele istorice pentru a perfec\u021biona procedurile pe parcursul timpului.<\/li>\n<\/ul>\n<h3>12.3 Practici de \u00eentre\u021binere<\/h3>\n<ul>\n<li>Verifica\u021bi func\u021bionarea mecanismului de virare \u00eenainte de fiecare oprire<\/li>\n<li>Verifica\u021bi calibrarea senzorilor de temperatur\u0103 ai rulmen\u021bilor.<\/li>\n<li>Verifica\u021bi dac\u0103 sistemele de scurgere prezint\u0103 blocaje.<\/li>\n<li>Verifica\u021bi integritatea izola\u021biei.<\/li>\n<li>Identifica\u021bi \u0219i elimina\u021bi orice surs\u0103 de \u00eenc\u0103lzire asimetric\u0103.<\/li>\n<\/ul>\n<p>De\u0219i este un fenomen temporar \u0219i reversibil, deformarea termic\u0103 reprezint\u0103 o provocare opera\u021bional\u0103 semnificativ\u0103 pentru utilajele rotative de mari dimensiuni. \u00cen\u021belegerea cauzelor sale, recunoa\u0219terea simptomelor \u0219i respectarea procedurilor corespunz\u0103toare de \u00eenc\u0103lzire \u0219i r\u0103cire sunt esen\u021biale pentru func\u021bionarea fiabil\u0103 a turbinelor cu abur, a turbinelor cu gaz \u0219i a altor echipamente rotative care func\u021bioneaz\u0103 la temperaturi ridicate \u2014 precum \u0219i pentru a distinge, pe loc, \u00eentre un rotor care are nevoie doar de timp pentru a se stabiliza \u0219i unul care trebuie cu adev\u0103rat echilibrat.<\/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 termic\u0103, o curbur\u0103 temporar\u0103 a arborelui cauzat\u0103 de \u00eenc\u0103lzirea neuniform\u0103 care produce simptome de vibra\u021bii \u00een timpul \u00eenc\u0103lzirii, frecvent\u0103 la turbinele \u0219i motoarele mari.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-268","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/268","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\/268\/revisions"}],"predecessor-version":[{"id":101463,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/268\/revisions\/101463"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}