{"id":207,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/recirculation\/"},"modified":"2026-05-23T22:53:11","modified_gmt":"2026-05-23T22:53:11","slug":"recirculation","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/hr\/glossary\/recirculation\/","title":{"rendered":"\u0160to je recirkulacija? Nestabilnost pumpe niskog protoka"},"content":{"rendered":"<h1>Razumijevanje recirkulacije u pumpama<\/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\/hr\/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\/hr\/product\/balanset-1\/\" title=\"Prijenosni balanser &amp; analizator vibracija 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 kompletan set prijenosnog balansera i analizatora vibracija\" 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\/hr\/product-category\/devices\/\" rel=\"tag\">ure\u0111aji<\/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\/hr\/product\/balanset-1\/\" title=\"Prijenosni balanser &amp; analizator vibracija Balanset-1A\">Portable balancer &amp; Vibration analyzer 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> + PDV (ako je primjenjivo)<\/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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Dodaj u ko\u0161aricu\" 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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Portable balancer &amp; Vibration analyzer Balanset-1A&quot; je dodan u va\u0161u ko\u0161aricu\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Dodaj u ko\u0161aricu<\/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\/hr\/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\/hr\/product\/vibration-sensor\/\" title=\"senzor vibracija\">\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=\"Detalj senzora vibracija 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\/hr\/product-category\/parts\/\" rel=\"tag\">dijelovi<\/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\/hr\/product\/vibration-sensor\/\" title=\"senzor vibracija\">senzor vibracija<\/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> + PDV (ako je primjenjivo)<\/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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Dodaj u ko\u0161aricu\" 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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Vibration sensor&quot; je dodan u va\u0161u ko\u0161aricu\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Dodaj u ko\u0161aricu<\/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\/hr\/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\/hr\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Opti\u010dki senzor (laserski tahometar)\">\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=\"Opti\u010dki senzor (laserski tahometar)\" 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\/hr\/product-category\/parts\/\" rel=\"tag\">dijelovi<\/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\/hr\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Opti\u010dki senzor (laserski tahometar)\">Opti\u010dki senzor (laserski tahometar)<\/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> + PDV (ako je primjenjivo)<\/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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Dodaj u ko\u0161aricu\" 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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Optical Sensor (Laser Tachometer)&quot; je dodan u va\u0161u ko\u0161aricu\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Dodaj u ko\u0161aricu<\/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\/hr\/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\/hr\/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=\"Vibromera komplet za balansiranje rotora: torba za no\u0161enje, vi\u0161ekanalni pretvara\u010d signala, ru\u010dni analizator, magnetska baza, senzori vibracija i spiralni kabeli.\" 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\/hr\/product-category\/devices\/\" rel=\"tag\">ure\u0111aji<\/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\/hr\/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> + PDV (ako je primjenjivo)<\/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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Dodaj u ko\u0161aricu\" 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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Balanset-4&quot; je dodan u va\u0161u ko\u0161aricu\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Dodaj u ko\u0161aricu<\/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\/hr\/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\/hr\/product\/magnet-stand\/\" title=\"Magnetski stalak Insize nosivosti 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=\"Magnetska baza.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/hr\/product-category\/parts\/\" rel=\"tag\">dijelovi<\/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\/hr\/product\/magnet-stand\/\" title=\"Magnetski stalak Insize nosivosti 60 kgf\">Magnetski stalak Insize nosivosti 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> + PDV (ako je primjenjivo)<\/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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Dodaj u ko\u0161aricu\" 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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"Dodaj u ko\u0161aricu: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Magnetic Stand Insize-60-kgf&quot; je dodan u va\u0161u ko\u0161aricu\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Dodaj u ko\u0161aricu<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hr\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hr\/product\/reflective-tape\/\" title=\"Reflektiraju\u0107a traka\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Reflektiraju\u0107a traka\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/hr\/product-category\/parts\/\" rel=\"tag\">dijelovi<\/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\/hr\/product\/reflective-tape\/\" title=\"Reflektiraju\u0107a traka\">Reflektiraju\u0107a traka<\/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> + PDV (ako je primjenjivo)<\/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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Dodaj u ko\u0161aricu\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Dodaj u ko\u0161aricu\" 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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?add-to-cart=2329\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2329\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2329\" data-product_sku=\"rt-1\" aria-label=\"Dodaj u ko\u0161aricu: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Reflective tape&quot; je dodan u va\u0161u ko\u0161aricu\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Dodaj u ko\u0161aricu<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2329\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hr\/product\/dynamic-balancer-balanset-1a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hr\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dinami\u010dki balanser \u201cBalanset-1A\u201d OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Sadr\u017eaj kompleta Balanset-1A s jedinicom za su\u010delje, senzorima, tahometrom i dodacima\" 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\/hr\/product-category\/devices\/\" rel=\"tag\">ure\u0111aji<\/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\/hr\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dinami\u010dki balanser \u201cBalanset-1A\u201d OEM\">Dinami\u010dki balanser \u201cBalanset-1A\u201d 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> + PDV (ako je primjenjivo)<\/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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Dodaj u ko\u0161aricu\" 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=\"\/hr\/wp-json\/wp\/v2\/glossary\/207?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=\"Dodaj u ko\u0161aricu: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Dynamic balancer \u201cBalanset-1A\u201d OEM&quot; je dodan u va\u0161u ko\u0161aricu\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Dodaj u ko\u0161aricu<\/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>Recirkulacija<\/strong> je nestabilnost protoka koja se razvija u centrifugalnim pumpama i ventilatorima kada rade pri proto\u010dnim brzinama znatno ispod projektne to\u010dke \u2014 to\u010dke najbolje u\u010dinkovitosti, ili BEP. Pri niskom protoku dio teku\u0107ine mijenja smjer, struje\u0107i unatrag iz izlazne regije prema usisnoj i stvaraju\u0107i nestabilne recirkulacijske obrasce na ulazu ili izlazu radilice. Rezultat je niskofrekventni <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/vibration\/\">vibracija<\/a> pulsacija (obi\u010dno 0,2\u20130,8\u00d7 brzine tr\u010danja i stoga <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/sub-synchronous\/\">subsinkroni<\/a>), buka, gubitak u\u010dinkovitosti i \u2014 u te\u0161kim slu\u010dajevima \u2014 ozbiljno mehani\u010dko o\u0161te\u0107enje uslijed cikli\u010dkog optere\u0107enja, <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/cavitation\/\">kavitacija<\/a> i grijanje. To spada me\u0111u najrazornije na\u010dine rada pumpe, a izbjegavanje toga je klju\u010dno za <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/centrifugal-pump-defects\/\">pouzdanost pumpe<\/a>.<\/p>\n<h2>1. Definicija: Hidrauli\u010dka nestabilnost niskog protoka<\/h2>\n<p>Radno kolo projektirano je tako da teku\u0107ina ulazi u njegove lopatice i izlazi iz njih pod odre\u0111enim kutovima pri BEP-u. Ako protok prigu\u0161ite znatno ispod te to\u010dke, trokuti brzine vi\u0161e se ne podudaraju s geometrijom lopatica: upadni kut postaje izrazito nepovoljan, tok se odvaja od lopatica, a teku\u0107ina koju je radno kolo ve\u0107 energiziralo vra\u0107a se unatrag. Ti obrnuti, vrtlo\u017eni tokovi jesu recirkulacija. Budu\u0107i da su nestabilne <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/hydraulic-forces\/\">hidrauli\u010dke sile<\/a> koje stvaraju mogu biti ogromne, recirkulacija mo\u017ee izazvati kvarove le\u017eajeva, o\u0161te\u0107enje brtvi, osovinu <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/fatigue\/\">umor<\/a> pa \u010dak i do strukturnog loma samog radnog kola. Razumijevanje i sprje\u010davanje toga klju\u010dni su za dug vijek pumpe.<\/p>\n<h2>2. Vrste recirkulacije<\/h2>\n<h3>Usisna recirkulacija<\/h3>\n<p>Doga\u0111a se na ulazu radnog kola (usisna strana):<\/p>\n<ul>\n<li><strong>Mehanizam:<\/strong> pri niskom protoku teku\u0107ina koja ulazi u oko radnog kola dolazi pod pogre\u0161nim kutom strujanja.<\/li>\n<li><strong>Razdvajanje:<\/strong> Tok se odvaja od usisnih povr\u0161ina lopatica.<\/li>\n<li><strong>Obrnuti tok:<\/strong> odvojena teku\u0107ina vra\u0107a se unatrag iz oka radnog kola.<\/li>\n<li><strong>Po\u010detak:<\/strong> obi\u010dno pri 60\u201370% protoka BEP.<\/li>\n<li><strong>Mjesto:<\/strong> koncentrirano uz pokrovne plo\u010de radnog kola.<\/li>\n<\/ul>\n<h3>Tla\u010dna recirkulacija<\/h3>\n<p>Doga\u0111a se na izlazu radnog kola (izlazna strana):<\/p>\n<ul>\n<li><strong>Mehanizam:<\/strong> Visokotla\u010dna ispusna teku\u0107ina struji natrag u periferiju rotora<\/li>\n<li><strong>Put:<\/strong> kroz zazore poput habaju\u0107ih prstenova i bo\u010dnih zazora.<\/li>\n<li><strong>Mije\u0161anje:<\/strong> Recirkulirani tok se mije\u0161a s glavnim tokom, stvaraju\u0107i <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/flow-turbulence\/\">turbulencija<\/a>.<\/li>\n<li><strong>Po\u010detak:<\/strong> obi\u010dno pri 40\u201360% protoka BEP.<\/li>\n<li><strong>Ozbiljnost:<\/strong> Op\u0107enito \u0161tetnije od usisne recirkulacije<\/li>\n<\/ul>\n<h3>Kombinirana recirkulacija<\/h3>\n<ul>\n<li>Istovremeno su prisutne usisna i ispu\u0161na recirkulacija.<\/li>\n<li>Doga\u0111a se pri vrlo niskim protokima, ispod otprilike 40% BEP-a.<\/li>\n<li>Proizvodi najja\u010de vibracije i najve\u0107i potencijal za o\u0161te\u0107enja.<\/li>\n<li>Trebalo bi izbjegavati za\u0161titom minimalnog protoka.<\/li>\n<\/ul>\n<h2>3. Vibracijski potpis<\/h2>\n<h3>Karakteristi\u010dni uzorak<\/h3>\n<ul>\n<li><strong>Frekvencija:<\/strong> sub-sinkrono, obi\u010dno 0,2\u20130,8\u00d7 brzine kretanja.<\/li>\n<li><strong>Primjer:<\/strong> pumpa od 1750 o\/min koja pokazuje pulsacije od 10\u201320 Hz.<\/li>\n<li><strong>Amplituda:<\/strong> mo\u017ee dose\u0107i 2\u20135\u00d7 normalne radne vibracije.<\/li>\n<li><strong>Nestabilno:<\/strong> i frekvencija i amplituda variraju umjesto da ostanu konstantne.<\/li>\n<li><strong>Nasumi\u010dna komponenta:<\/strong> \u0161irokopojasno pove\u0107anje od turbulencija se nadovezuje.<\/li>\n<\/ul>\n<p>Ovaj lutaju\u0107i, asinkroni karakter ono je \u0161to razlikuje recirkulaciju od stalnog 1\u00d7 od <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/unbalance\/\">neravnote\u017ea<\/a> i vrhunac brzine o\u0161trice <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/vane-passing-frequency\/\">frekvencija prolaska lopatice<\/a>; snimanje obi\u010dno zahtijeva ispitivanje oba <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/spectrum\/\">spektar<\/a> i <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/time-waveform\/\">vremenski valni oblik<\/a>.<\/p>\n<h3>Ovisnost o protoku<\/h3>\n<ul>\n<li><strong>Visoki protok:<\/strong> bez recirkulacije, niska vibracija.<\/li>\n<li><strong>Umjereni protok (80\u2013100% BEP):<\/strong> minimalna recirkulacija, prihvatljiva vibracija.<\/li>\n<li><strong>Niski protok (50\u201370% BEP):<\/strong> Po\u010dinje usisna recirkulacija i vibracija raste.<\/li>\n<li><strong>Vrlo nizak protok (&lt; 50% BEP):<\/strong> te\u0161ka recirkulacija i vrlo visoka vibracija.<\/li>\n<li><strong>Zatvaranje:<\/strong> maksimalna recirkulacija, maksimalna vibracija i najbr\u017ea stopa o\u0161te\u0107enja.<\/li>\n<\/ul>\n<h3>Dodatni pokazatelji<\/h3>\n<ul>\n<li>Visoka <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/axial-vibration\/\">aksijalne vibracije<\/a> komponenta.<\/li>\n<li>Poja\u010dana buka \u2014 re\u017eanje ili tutnjava.<\/li>\n<li>Pad performansi, pri \u010demu tlak i protok padaju ispod krivulje.<\/li>\n<li>Porast temperature nastaje zbog gubitaka u hidraulici koji se otpu\u0161taju u teku\u0107inu.<\/li>\n<\/ul>\n<h2>4. Posljedice i \u0161teta<\/h2>\n<h3>Trenutni u\u010dinci<\/h3>\n<ul>\n<li><strong>Jaka vibracija:<\/strong> Mo\u017ee prekr\u0161iti alarmne granice u roku od nekoliko minuta.<\/li>\n<li><strong>Buka:<\/strong> glasan, turbulentan urlik.<\/li>\n<li><strong>Gubitak u\u010dinkovitosti:<\/strong> visoka potro\u0161nja snage za zapravo isporu\u010deni protok.<\/li>\n<li><strong>Grijanje:<\/strong> hidrauli\u010dki gubici pretvoreni u toplinu u ku\u0107i\u0161tu.<\/li>\n<\/ul>\n<h3>Mehani\u010dka o\u0161te\u0107enja<\/h3>\n<ul>\n<li><strong>Kvar le\u017eaja:<\/strong> Visoka cikli\u010dka optere\u0107enja ubrzavaju habanje le\u017eaja. <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/bearing-wear\/\">nositi<\/a>.<\/li>\n<li><strong>\u0160teta od brtvila:<\/strong> vibracija i pulsacija tlaka uni\u0161tavaju <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/seal-defects\/\">mehani\u010dki brtvovi<\/a>.<\/li>\n<li><strong>Umor osovine:<\/strong> naizmjeni\u010dni savojni napon od nestabilnih hidrauli\u010dkih sila.<\/li>\n<li><strong>O\u0161te\u0107enje radnog kola:<\/strong> lopatica <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/impeller-defects\/\">umor u materijalu<\/a> od cikli\u010dkog optere\u0107enja.<\/li>\n<\/ul>\n<h3>Hidrauli\u010dna o\u0161te\u0107enja<\/h3>\n<ul>\n<li><strong>Kavitacija:<\/strong> Zone recirkulacije sklone su kavitaciji kada lokalni tlak padne ispod tlakom pare.<\/li>\n<li><strong>Erozija:<\/strong> Brzi recirkuliraju\u0107i tok erodira povr\u0161ine.<\/li>\n<li><strong>Vorteksna kavitacija:<\/strong> Vortlozi unutar zona recirkulacije kaviteraju u svojim jezgrama niskog tlaka.<\/li>\n<\/ul>\n<h2>5. Otkrivanje i dijagnoza<\/h2>\n<h3>Analiza vibracija<\/h3>\n<ul>\n<li>Potra\u017eite sub-sinkrone komponente u opsegu od 0,2 do 0,8\u00d7.<\/li>\n<li>Testirajte pri vi\u0161e brzina protoka kako biste mapirali pona\u0161anje.<\/li>\n<li>Odredite brzinu protoka pri kojoj po\u010dinju pulsacije \u2014 po\u010detak recirkulacije.<\/li>\n<li>Usporedite nalaze s predvi\u0111anjima krivulje performansi pumpe.<\/li>\n<\/ul>\n<h3>Testiranje performansi<\/h3>\n<ul>\n<li>Izmjerite stvarnu krivulju tlaka i protoka.<\/li>\n<li>Usporedi ga s krivuljom dizajna.<\/li>\n<li>Odstupanje pri niskim signalima protoka ukazuje na recirkulaciju.<\/li>\n<li>Potro\u0161nja energije ve\u0107a od one koju predvi\u0111a krivulja predstavlja potvrdni dokaz.<\/li>\n<\/ul>\n<h3>Akusti\u010dki monitoring<\/h3>\n<ul>\n<li>Jedinstven zvuk turbulentnog re\u017eanja.<\/li>\n<li>Pove\u0107anje \u0161irokopojasnog \u0161uma.<\/li>\n<li>\u010cesto se \u010duje i opipa na ku\u0107i\u0161tu pumpe.<\/li>\n<\/ul>\n<h2>6. Prevencija i ubla\u017eavanje<\/h2>\n<h3>Operativne strategije<\/h3>\n<h4>Za\u0161tita minimalnog protoka<\/h4>\n<ul>\n<li>Ugradite automatsku recirkulacijsku liniju minimalnog protoka.<\/li>\n<li>Ventil se otvara kad god protok padne ispod sigurnog minimuma (obi\u010dno 60\u201370% od BEP).<\/li>\n<li>Recirkulira otpadnu vodu natrag na usis ili u spremnik.<\/li>\n<li>Ovo dr\u017ei pumpu izvan zone recirkulacije.<\/li>\n<\/ul>\n<h4>Kontrola radne to\u010dke<\/h4>\n<ul>\n<li>Izbjegavajte rad ispod minimalnog kontinuiranog stabilnog protoka.<\/li>\n<li>Koristite frekvencijski pogon kako biste prilagodili pumpu potra\u017enji, iskori\u0161tavaju\u0107i <a href=\"https:\/\/vibromera.eu\/hr\/calculators\/affinity-laws-calculator\/\">zakoni afiniteta<\/a> vo\u017enja BEP-a kroz niz du\u017enosti.<\/li>\n<li>Radije upotrijebite nekoliko manjih pumpi umjesto jedne velike radi boljeg raspona snage.<\/li>\n<li>Postupno uklju\u010dujte i isklju\u010dujte pumpe paralelno s promjenom potra\u017enje.<\/li>\n<\/ul>\n<h3>Dizajnerska rje\u0161enja<\/h3>\n<ul>\n<li><strong>Induktor:<\/strong> faza aksijalnog usisnog ulaza za stabilizaciju usisnog toka.<\/li>\n<li><strong>Impelteri niskog protoka:<\/strong> posebni dizajni namijenjeni za servis pri niskom protoku.<\/li>\n<li><strong>Pravilno odre\u0111ivanje veli\u010dine:<\/strong> Nemojte preveliko dimenzionirati pumpu, \u0161to prisiljava na kroni\u010dno radenje s niskim protokom.<\/li>\n<li><strong>\u0160iri radni raspon:<\/strong> Odaberite pumpe s ravnim krivuljama koje podnose varijacije protoka.<\/li>\n<\/ul>\n<h3>Dizajn sustava<\/h3>\n<ul>\n<li>Dizajnirajte sustav tako da pumpa radi blizu BEP-a.<\/li>\n<li>Osigurajte adekvatan NPSH mar\u017ein kako biste ograni\u010dili kavitaciju u zonama recirkulacije.<\/li>\n<li>Postavite kontrolne ventile kako biste minimizirali prigu\u0161ivanje usisavanja.<\/li>\n<li>Uklju\u010dite zaobilazne ili recirkulacijske sustave kako biste osigurali minimalni protok.<\/li>\n<\/ul>\n<h2>7. Industrijski standardi i smjernice<\/h2>\n<h3>Minimalni kontinuirani protok<\/h3>\n<ul>\n<li><strong>API 610:<\/strong> Odre\u0111uje minimalni kontinuirani stabilni protok za centrifugalne pumpe<\/li>\n<li><strong>Tipi\u010dne vrijednosti:<\/strong> 60\u201370% protok BEP za radijalne pumpe, 70\u201380% za dizajne mije\u0161anog protoka.<\/li>\n<li><strong>Terminska razmatranja:<\/strong> Minimalni protok tako\u0111er je ograni\u010den porastom temperature koji teku\u0107ina mo\u017ee podnijeti pri malom protoku.<\/li>\n<\/ul>\n<h3>Testiranje performansi<\/h3>\n<ul>\n<li>Tvornicka ispitivanja provjeravaju to\u010dku uklju\u010divanja recirkulacije.<\/li>\n<li>Terenski testovi performansi to potvr\u0111uju u instaliranom sustavu.<\/li>\n<li>Kriteriji prihva\u0107anja odre\u0111uju dopu\u0161tenu vibraciju pri minimalnom protoku, \u010desto referiranu na <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/iso-20816-1\/\">ISO 20816<\/a> zone ozbiljnosti.<\/li>\n<\/ul>\n<p>Budu\u0107i da recirkulacija, neuravnote\u017eenost, efekti prolaza lopatica i kavitacija mogu pove\u0107ati vibracije pumpe, prakti\u010dni dijagnosti\u010dki korak je izmjeriti spektar pri nekoliko protoka i vidjeti koja komponenta prati protok. Prijenosni dvo-kanalni analizator poput <a href=\"https:\/\/vibromera.eu\/hr\/proizvod\/balanset-1\/\">Balanset-1A<\/a> Prikazuje sub-sinkronu pulsaciju i njezinu ovisnost o protoku izravno na pumpi, poma\u017eu\u0107i potvrditi recirkulaciju umjesto kvara rotora \u2014 i, kada se utvrdi povi\u0161ena vibracija od 1\u00d7 <a href=\"https:\/\/vibromera.eu\/hr\/glossary\/unbalance\/\">neravnote\u017ea<\/a> u radnom kolu omogu\u0107uje tehni\u010daru da ga uravnote\u017ei na mjestu bez rastavljanja pumpe. Za odre\u0111ivanje relevantnih frekvencija prije po\u010detka, <a href=\"https:\/\/vibromera.eu\/hr\/calculators\/pump-cavitation-frequency\/\">procjenjiva\u010d frekvencije kavitacije pumpe<\/a> i <a href=\"https:\/\/vibromera.eu\/hr\/calculators\/blade-pass-frequency\/\">ra\u010dunalo frekvencije prijelaza o\u0161trice<\/a> Ozna\u010dite gdje bi se trebali pojaviti \u0161um kavitacije i vrhunci prolaza lopatica, kako bi lutaju\u0107a podsinkrona zona recirkulacije jasno istaknula.<\/p>\n<p>Recirkulacija je me\u0111u najte\u017eim radnim uvjetima koje centrifugalna pumpa mo\u017ee do\u017eivjeti. Njezin karakteristi\u010dni podsinkroni potresni potpis, velike amplitude pulsacije i sposobnost brzog mehani\u010dkog o\u0161te\u0107enja \u010dine nu\u017enim razumijevanje uvjeta nastanka, ugradnju za\u0161tite od minimalnog protoka i izbjegavanje kronog rada pri niskom protoku \u2014 klju\u010dnih \u010dimbenika pouzdanosti i dugovje\u010dnosti pumpe u industrijskoj slu\u017ebi.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/hr\/glossary\/\">\u2190 Natrag na glavni indeks<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Saznajte vi\u0161e o recirkulaciji u pumpama, preokretanju protoka i nestabilnosti pri niskim protocima \u0161to uzrokuje subsinkrone vibracijske pulsacije, gubitak u\u010dinkovitosti i potencijalna o\u0161te\u0107enja.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-207","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/glossary\/207","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/glossary\/207\/revisions"}],"predecessor-version":[{"id":101401,"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/glossary\/207\/revisions\/101401"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/media?parent=207"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/categories?post=207"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/hr\/wp-json\/wp\/v2\/tags?post=207"}],"curies":[{"name":"radni list","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}