{"id":293,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/vane-passing-frequency\/"},"modified":"2026-05-23T22:46:43","modified_gmt":"2026-05-23T22:46:43","slug":"vane-passing-frequency","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/sv\/glossary\/vane-passing-frequency\/","title":{"rendered":"Vad \u00e4r pumpbladspassagefrekvens? Diagnostik av pumpblad"},"content":{"rendered":"<h1>F\u00f6rst\u00e5 skovelpasseringsfrekvens<\/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\/sv\/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\/sv\/product\/balanset-1\/\" title=\"Portabel balanserare &amp; vibrationsanalysator 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 komplett kit med portabel balanserare och vibrationsanalysator\" 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\/sv\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/sv\/product\/balanset-1\/\" title=\"Portabel balanserare &amp; vibrationsanalysator Balanset-1A\">Portabel balanserare &amp; vibrationsanalysator 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> + moms (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorgen: \u201dPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Portable balancer &amp; Vibration analyzer Balanset-1A&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">\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=\"Balanset-1A vibrationssensor - n\u00e4rbild\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">Vibrationssensor<\/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> + moms (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorgen: \u201dVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Vibration sensor&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (lasertakometer)\">\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=\"Optisk sensor (lasertakometer)\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (lasertakometer)\">Optisk sensor (lasertakometer)<\/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> + moms (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorgen: \u201dOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Optical Sensor (Laser Tachometer)&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/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 rotorbalanseringssats: b\u00e4rv\u00e4ska, flerkanalig signalkonditionerare, handh\u00e5llen analysator, magnetisk bas, vibrationssensorer och spiralformade kablar.\" 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\/sv\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/sv\/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> + moms (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorgen: \u201dBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Balanset-4&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/magnet-stand\/\" title=\"Magnetiskt stativ 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=\"Magnetf\u00e4ste.\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/product\/magnet-stand\/\" title=\"Magnetiskt stativ Insize-60-kgf\">Magnetiskt stativ 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> + moms (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorgen: \u201dMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Magnetic Stand Insize-60-kgf&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/reflective-tape\/\" title=\"Reflekterande tejp\">\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=\"Reflekterande tejp\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/product\/reflective-tape\/\" title=\"Reflekterande tejp\">Reflekterande tejp<\/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> + moms (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorgen: \u201dReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Reflective tape&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balanserare &quot;Balanset-1A&quot; OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A-kit, inneh\u00e5ll med gr\u00e4nssnittsenhet, givare, varvr\u00e4knare och tillbeh\u00f6r\" 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\/sv\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/sv\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balanserare &quot;Balanset-1A&quot; OEM\">Dynamisk balanserare \"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> + moms (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/293?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=\"L\u00e4gg till i varukorgen: \u201dDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Dynamic balancer \u201cBalanset-1A\u201d OEM&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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>Skovelpasseringsfrekvens<\/strong> (VPF - \u00e4ven kallad pumphjulets skovelpassagefrekvens eller bara skovelpassage) \u00e4r den frekvens med vilken skovlarna p\u00e5 ett roterande pumphjul passerar en station\u00e4r referenspunkt, till exempel voluttungan, diffusorskovlarna eller n\u00e5gon annan del av pumphuset. Den ber\u00e4knas som antalet pumphjulsskovlar multiplicerat med axelns rotationsfrekvens: <strong>VPF = N<sub>v<\/sub> \u00d7 VARVTAL \/ 60<\/strong>. VPF \u00e4r den direkta pumpmotsvarigheten till <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/blade-passing-frequency\/\">bladpasseringsfrekvens<\/a> i fl\u00e4ktar, och det \u00e4r den dominerande hydrauliska <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/vibration\/\">vibrationer<\/a> i centrifugalpumpar och upptr\u00e4der typiskt mellan 100 och 500 Hz f\u00f6r industrimaskiner. Att f\u00f6lja VPF-amplituden och dess <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/harmonics\/\">\u00f6vertoner<\/a> ger viktig diagnostisk information om pumphjulets skick, hydrauliska prestanda och inv\u00e4ndiga spel.<\/p>\n<h2>1. Ber\u00e4kning och typiska v\u00e4rden<\/h2>\n<h3>Formel<\/h3>\n<blockquote><p><strong>VPF = N<sub>v<\/sub> \u00d7 N \/ 60<\/strong> &nbsp; d\u00e4r N<sub>v<\/sub> = antal skovlar p\u00e5 pumphjulet, N = axelvarvtal i RPM och resultatet i Hz.<\/p><\/blockquote>\n<p>Eftersom VPF alltid \u00e4r en heltalsmultipel av <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/running-speed\/\">driftshastighet<\/a> (1\u00d7), ligger den stadigt bland de synkrona komponenterna i spektrumet - det \u00e4r en verklig skovelpassagefrekvens <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/harmonics\/\">harmonisk<\/a> kopplad till axelvarvtalet, inte en oberoende frekvens.<\/p>\n<h3>Genomarbetade exempel<\/h3>\n<ul>\n<li><strong>Liten pump:<\/strong> 5 lameller vid 3500 varv\/min \u2192 VPF = 5 \u00d7 3500 \/ 60 = <strong>292 Hz<\/strong>.<\/li>\n<li><strong>Stor processpump:<\/strong> 7 lameller vid 1750 varv\/min \u2192 VPF = 7 \u00d7 1750 \/ 60 = <strong>204 Hz<\/strong>.<\/li>\n<li><strong>Pump med h\u00f6g hastighet:<\/strong> 6 lameller vid 4200 varv\/min \u2192 VPF = 6 \u00d7 4200 \/ 60 = <strong>420 Hz<\/strong>.<\/li>\n<\/ul>\n<h3>Typiskt antal skovlar<\/h3>\n<ul>\n<li><strong>Centrifugalpumpar:<\/strong> 3-12 skovlar, varav 5-7 \u00e4r vanligast.<\/li>\n<li><strong>Sm\u00e5 pumpar:<\/strong> f\u00e4rre skovlar (3-5).<\/li>\n<li><strong>Stora pumpar:<\/strong> fler skovlar (7\u201312).<\/li>\n<li><strong>Pumpar med h\u00f6g uppfordringsh\u00f6jd:<\/strong> fler skovlar f\u00f6r att \u00f6verf\u00f6ra energi effektivt.<\/li>\n<\/ul>\n<p>Det \u00e4r viktigt att k\u00e4nna till det exakta antalet skovlar, eftersom det \u00e4r det som skiljer VPF fr\u00e5n en slumpm\u00e4ssig axelharmonisk; om impellerritningen inte \u00e4r tillg\u00e4nglig kan skovelantalet ofta bekr\u00e4ftas genom att r\u00e4kna den harmoniska ordning vid vilken den dominerande hydrauliska toppen landar. Den <a href=\"https:\/\/vibromera.eu\/sv\/calculators\/blade-pass-frequency\/\">Kalkylator f\u00f6r bladpassfrekvens<\/a> hanterar aritmetiken f\u00f6r b\u00e5de pumpar och fl\u00e4ktar, och <a href=\"https:\/\/vibromera.eu\/sv\/calculators\/harmonic-frequency-calculator\/\">Harmonisk frekvenskalkylator<\/a> hj\u00e4lper till att placera VPF och dess multiplar p\u00e5 frekvensaxeln.<\/p>\n<h2>2. Den fysiska mekanismen<\/h2>\n<h3>Tryckpulsationer<\/h3>\n<p>VPF har sitt ursprung i hydraulisk tryckvariation snarare \u00e4n mekanisk kraft. Sekvensen \u00e4r:<\/p>\n<ol>\n<li>Varje skovel i pumphjulet transporterar v\u00e4tskan ut\u00e5t med h\u00f6g hastighet.<\/li>\n<li>N\u00e4r en skovel passerar spiralhusets tungspets genererar den en skarp tryckpuls.<\/li>\n<li>Tryckskillnaden \u00f6ver skoveln \u00e4ndras snabbt i det \u00f6gonblicket.<\/li>\n<li>Detta ger en kraftpuls p\u00e5 b\u00e5de pumphjulet och h\u00f6ljet.<\/li>\n<li>Med N<sub>v<\/sub> skovlar, N<sub>v<\/sub> s\u00e5dana pulser uppst\u00e5r vid varje varv.<\/li>\n<li>Den resulterande pulsationsfrekvensen \u00e4r lika med skovelpassagefrekvensen - VPF.<\/li>\n<\/ol>\n<p>Detta g\u00f6r VPF till en av de klassiska <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/hydraulic-forces\/\">hydrauliska krafter<\/a> som verkar p\u00e5 en pump, till skillnad fr\u00e5n rent mekaniska excitationer som t.ex. <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/unbalance\/\">obalans<\/a> eller lagerdefekter.<\/p>\n<h3>Vid konstruktionspunkten (BEP)<\/h3>\n<ul>\n<li>Den inkommande fl\u00f6desvinkeln matchar skovelns vinkel.<\/li>\n<li>Fl\u00f6det \u00e4r j\u00e4mnt med minimal turbulens.<\/li>\n<li>VPF-amplituden \u00e4r m\u00e5ttlig och stabil.<\/li>\n<li>Tryckf\u00f6rdelningen runt pumphuset \u00e4r n\u00e4ra optimal.<\/li>\n<\/ul>\n<h3>Utanf\u00f6r konstruktionspunkten<\/h3>\n<ul>\n<li>Fl\u00f6desvinkeln st\u00e4mmer inte l\u00e4ngre \u00f6verens med skovelns vinkel.<\/li>\n<li>Turbulensen och fl\u00f6desseparationen \u00f6kar.<\/li>\n<li>Tryckpulsationerna blir starkare.<\/li>\n<li>VPF-amplituden \u00f6kar, ofta med ytterligare frekvenskomponenter.<\/li>\n<\/ul>\n<h2>3. Diagnostisk tolkning<\/h2>\n<h3>Normal VPF-amplitud<\/h3>\n<ul>\n<li>Pumpen arbetar vid eller n\u00e4ra sin b\u00e4sta verkningsgradspunkt (BEP).<\/li>\n<li>VPF-amplituden \u00e4r stabil under flera p\u00e5 varandra f\u00f6ljande m\u00e4tningar.<\/li>\n<li>Typiskt 10\u201330% av 1\u00d7 vibrationsamplituden.<\/li>\n<li>Ett rent spektrum med minimalt harmoniskt inneh\u00e5ll.<\/li>\n<\/ul>\n<h3>Vad en f\u00f6rh\u00f6jd VPF visar<\/h3>\n<p><strong>Drift utanf\u00f6r BEP.<\/strong> L\u00e5gfl\u00f6desdrift (under ~70% av BEP) h\u00f6jer VPF, liksom h\u00f6gfl\u00f6desdrift (\u00f6ver ~120% av BEP); det optimala intervallet \u00e4r ungef\u00e4r 80\u2013110% av BEP. Ih\u00e5llande l\u00e5gfl\u00f6desdrift \u00e4r ocks\u00e5 kopplad till <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/recirculation\/\">intern \u00e5tercirkulation<\/a>.<\/p>\n<p><strong>Problem med spel mellan pumphjul och h\u00f6lje.<\/strong> Slitna slitringar eller ett pumphjul som f\u00f6rskjuts av <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/bearing-wear\/\">slitage p\u00e5 lager<\/a>, \u00f6kar driftspelet; VPF-amplituden stiger n\u00e4r spelet \u00f6kar, vilket \u00e5tf\u00f6ljs av prestandaf\u00f6rlust genom internt l\u00e4ckage.<\/p>\n<p><strong>Skada p\u00e5 pumphjulet.<\/strong> Trasiga eller spruckna skovlar skapar asymmetri, vilket ger VPF med <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/sidebands\/\">sidband<\/a> vid \u00b11\u00d7 k\u00f6rhastighet; erosion, uppbyggnad p\u00e5 skovlarna eller skador fr\u00e5n fr\u00e4mmande f\u00f6rem\u00e5l fungerar p\u00e5 liknande s\u00e4tt. Dessa \u00e4r typiska f\u00f6r bredare <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/impeller-defects\/\">defekter p\u00e5 pumphjulet<\/a>.<\/p>\n<p><strong>Hydraulisk resonans.<\/strong> Om VPF r\u00e5kar sammanfalla med en akustisk <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/resonance\/\">resonans<\/a> i r\u00f6rledningen eller h\u00f6ljet f\u00f6rst\u00e4rks amplituden dramatiskt, vilket ibland leder till kraftiga strukturella vibrationer och buller som kr\u00e4ver system\u00e4ndringar.<\/p>\n<h2>4. VPF \u00d6vertoner och underharmonier<\/h2>\n<h3>2\u00d7VPF och h\u00f6gre<\/h3>\n<p>Flera \u00f6vertoner i skovelpassagefrekvensen \u00e4r en varningssignal:<\/p>\n<ul>\n<li><strong>2\u00d7VPF n\u00e4rvarande:<\/strong> tyder p\u00e5 oj\u00e4mnt skovelavst\u00e5nd eller excentricitet hos pumphjulet.<\/li>\n<li><strong>Flera \u00f6vertoner:<\/strong> pekar p\u00e5 allvarlig hydraulisk turbulens eller skador p\u00e5 skovlarna.<\/li>\n<li><strong>Alltf\u00f6r h\u00f6ga amplituder:<\/strong> \u00f6ka risken f\u00f6r <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/fatigue\/\">tr\u00f6tthet<\/a> skador i skovlar och h\u00f6lje.<\/li>\n<\/ul>\n<h3>Subharmoniker<\/h3>\n<ul>\n<li>Fraktionerade komponenter s\u00e5som VPF\/2 eller VPF\/3.<\/li>\n<li>Indikerar fl\u00f6desinstabiliteter, inklusive roterande stall och separationsceller.<\/li>\n<li>Vanligast vid mycket l\u00e5ga fl\u00f6den och liknar andra <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/subharmonic\/\">subharmonisk<\/a> fenomen.<\/li>\n<\/ul>\n<h2>5. \u00d6vervakning och trendanalys<\/h2>\n<h3>Uppr\u00e4ttande av en baslinje<\/h3>\n<ul>\n<li>Registrera VPF n\u00e4r pumpen \u00e4r ny eller nyligen renoverad.<\/li>\n<li>Dokumentera det vid den dimensionerande driftpunkten.<\/li>\n<li>Uppr\u00e4tta det normala f\u00f6rh\u00e5llandet mellan VPF och 1\u00d7 amplitud.<\/li>\n<li>St\u00e4ll in larmgr\u00e4nser, vanligen 2\u20133\u00d7 baslinjens VPF-amplitud.<\/li>\n<\/ul>\n<h3>Trendparametrar<\/h3>\n<ul>\n<li><strong>VPF amplitud:<\/strong> f\u00f6ljs \u00f6ver tid; en stadig \u00f6kning signalerar ett problem under utveckling.<\/li>\n<li><strong>VPF\/1\u00d7 f\u00f6rh\u00e5llande:<\/strong> b\u00f6r f\u00f6rbli relativt konstant.<\/li>\n<li><strong>Harmoniskt inneh\u00e5ll:<\/strong> uppkomsten eller tillv\u00e4xten av 2\u00d7VPF och 3\u00d7VPF.<\/li>\n<li><strong>Sidbandsutveckling:<\/strong> uppkomst av \u00b11\u00d7 sidband runt VPF.<\/li>\n<\/ul>\n<h3>Korrelation med driftsf\u00f6rh\u00e5llanden<\/h3>\n<ul>\n<li>Plotta VPF mot fl\u00f6det.<\/li>\n<li>Identifiera driftzonen f\u00f6r minsta VPF.<\/li>\n<li>Detektera n\u00e4r driftpunkten har flyttat sig.<\/li>\n<li>Korrelera VPF-beteendet med uppm\u00e4tt prestandaf\u00f6rs\u00e4mring.<\/li>\n<\/ul>\n<p>Denna typ av <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/trend-analysis\/\">trendanalys<\/a> \u00e4r beroende av konsekventa, repeterbara spektra. En b\u00e4rbar tv\u00e5kanalig vibrationsanalysator som t.ex. <a href=\"https:\/\/vibromera.eu\/sv\/produkt\/balanset-1\/\">Balanset-1A<\/a> f\u00e5ngar upp <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/spectrum\/\">FFT-spektrum<\/a> med VPF tydligt uppl\u00f6st i det hydrauliska omr\u00e5det 100\u2013500 Hz, s\u00e5 att en tekniker kan bekr\u00e4fta skovelpassagetoppen, f\u00f6lja dess amplitud och sidband fr\u00e5n bes\u00f6k till bes\u00f6k och utesluta mekaniska <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/unbalance\/\">obalans<\/a> orsaker innan pumpen \u00f6ppnas.<\/p>\n<h2>6. Korrigerande \u00e5tg\u00e4rder<\/h2>\n<h3>Driftpunktsoptimering<\/h3>\n<ul>\n<li>Justera fl\u00f6det s\u00e5 att pumpen n\u00e4rmar sig BEP.<\/li>\n<li>Stryp utloppet eller \u00e4ndra systemets motst\u00e5nd.<\/li>\n<li>Kontrollera att sugf\u00f6rh\u00e5llandena \u00e4r tillr\u00e4ckliga.<\/li>\n<\/ul>\n<h3>Mekanisk korrigering<\/h3>\n<ul>\n<li>Byt ut slitna slitringar f\u00f6r att \u00e5terst\u00e4lla konstruktionsspelen.<\/li>\n<li>Byt ut ett slitet eller skadat pumphjul.<\/li>\n<li>\u00c5tg\u00e4rda lagerproblem som g\u00f6r att pumphjulet kan r\u00f6ra sig.<\/li>\n<li>Kontrollera att pumphjulet \u00e4r korrekt placerat, b\u00e5de axiellt och radiellt.<\/li>\n<\/ul>\n<h3>Hydrauliska f\u00f6rb\u00e4ttringar<\/h3>\n<ul>\n<li>F\u00f6rb\u00e4ttra inloppsr\u00f6ren f\u00f6r att minska f\u00f6rrotation och turbulens.<\/li>\n<li>Montera fl\u00f6desriktare d\u00e4r s\u00e5 \u00e4r l\u00e4mpligt.<\/li>\n<li>Kontrollera att NPSH-marginalen \u00e4r tillr\u00e4cklig f\u00f6r att undvika <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/cavitation\/\">kavitation<\/a>.<\/li>\n<li>Eliminera luftinblandning.<\/li>\n<\/ul>\n<h2>7. F\u00f6rh\u00e5llande till andra frekvenser<\/h2>\n<h3>VPF j\u00e4mf\u00f6rt med BPF<\/h3>\n<ul>\n<li>Termerna anv\u00e4nds ofta synonymt f\u00f6r pumpar och fl\u00e4ktar.<\/li>\n<li><strong>VPF:<\/strong> den f\u00f6redragna termen f\u00f6r pumpar (skovlar som flyttar v\u00e4tska).<\/li>\n<li><strong>BPF:<\/strong> den f\u00f6redragna termen f\u00f6r fl\u00e4ktar (blad som flyttar luft).<\/li>\n<li>Ber\u00e4knings- och diagnosmetoden \u00e4r identisk.<\/li>\n<\/ul>\n<h3>VPF kontra varvtal<\/h3>\n<ul>\n<li>VPF = N<sub>v<\/sub> \u00d7 (varvtalsfrekvens).<\/li>\n<li>VPF \u00e4r alltid en h\u00f6gre frekvens \u00e4n 1\u00d7.<\/li>\n<li>F\u00f6r ett pumphjul med 7 skovlar, till exempel, ligger VPF exakt vid 7\u00d7 varvtalsfrekvensen.<\/li>\n<\/ul>\n<p>Skovelpassagefrekvens \u00e4r den grundl\u00e4ggande hydrauliska vibrationskomponenten i varje centrifugalpump. Om man beh\u00e4rskar hur den ber\u00e4knas, kan skilja mellan normala och f\u00f6rh\u00f6jda amplituder och korrelera dess m\u00f6nster med b\u00e5de driftsf\u00f6rh\u00e5llanden och pumpens skick, blir en enda spektraltopp ett kraftfullt diagnostiskt verktyg som v\u00e4gleder v\u00e4lgrundade beslut om optimering av arbetspunkten, \u00e5terst\u00e4llning av spel och byte av pumphjul. Det \u00e4r en h\u00f6rnsten i bredare <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/pump-defects\/\">pumpfeldiagnostik<\/a>.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/sv\/glossary\/\">\u2190 Tillbaka till huvudregistret<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e4r dig om skovelpasseringsfrekvens (VPF), den hastighet med vilken pumphjulets skovlar passerar en station\u00e4r diffusor eller spiralhusets tunga, vilket \u00e4r avg\u00f6rande f\u00f6r att diagnostisera hydrauliska och mekaniska problem.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[114,109],"tags":[],"class_list":["post-293","glossary","type-glossary","status-publish","hentry","category-analysis","category-glossary"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/293\/revisions"}],"predecessor-version":[{"id":101369,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/293\/revisions\/101369"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/media?parent=293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/categories?post=293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/tags?post=293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}