{"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\/fi\/glossary\/vane-passing-frequency\/","title":{"rendered":"Mik\u00e4 on siiven ohitustaajuus? Pumpun lapojen diagnostiikka"},"content":{"rendered":"<h1>Siipien ohitustaajuuden ymm\u00e4rt\u00e4minen<\/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\/fi\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori 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 kannettava tasapainotin ja v\u00e4r\u00e4htelyanalysaattori, t\u00e4ydellinen sarja\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori Balanset-1A\">Kannettava tasapainotin &#038; t\u00e4rin\u00e4analysaattori 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\">&euro;<\/span>1,975.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">\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:n t\u00e4rin\u00e4anturin l\u00e4hikuva\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">T\u00e4rin\u00e4anturi<\/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\">&euro;<\/span>90.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">\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=\"Optinen anturi (lasertakometri)\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">Optinen anturi (lasertakometri)<\/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\">&euro;<\/span>124.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/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-roottorin tasapainotussarja: kantolaukku, monikanavainen signaalimuunnin, k\u00e4dess\u00e4 pidett\u00e4v\u00e4 analysaattori, magneettijalusta, t\u00e4rin\u00e4anturit ja kierretyt kaapelit.\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/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\">&euro;<\/span>6,803.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta 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=\"Magneettipohja.\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta Insize-60-kgf\">Magneettinen jalusta 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\">&euro;<\/span>46.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">\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=\"Heijastava nauha\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">Heijastava nauha<\/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\">&euro;<\/span>10.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &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-pakkauksen sis\u00e4lt\u00f6, jossa on liit\u00e4nt\u00e4yksikk\u00f6, anturit, kierroslukumittari ja lis\u00e4varusteet\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &quot;Balanset-1A&quot; OEM\">Dynaaminen tasapainotin \"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\">&euro;<\/span>1,735.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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>Siipien ohitustaajuus<\/strong> (VPF \u2013 jota kutsutaan my\u00f6s juoksupy\u00f6r\u00e4n siipien taajuudeksi tai yksinkertaisesti siipien ohituskerroiksi) on taajuus, jolla py\u00f6riv\u00e4n pumpun juoksupy\u00f6r\u00e4n siivet ohittavat kiinte\u00e4n vertailupisteen, kuten spiraalikotelon leikkausk\u00e4rjen (kielen), diffuusorin siivet tai jonkin muun kotelon osan. Se lasketaan kertomalla juoksupy\u00f6r\u00e4n siipien lukum\u00e4\u00e4r\u00e4 akselin py\u00f6rimistaajuudella: <strong>VPF = N<sub>v<\/sub> \u00d7 RPM \/ 60<\/strong>. VPF on suora pumppuvastine <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/blade-passing-frequency\/\">ter\u00e4n ohitustaajuus<\/a> jota esiintyy tuulettimissa, ja se on hallitseva hydrauliikka <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/vibration\/\">t\u00e4rin\u00e4<\/a> l\u00e4hde keskipakopumppuissa, ja se esiintyy teollisuuskoneissa tyypillisesti taajuusalueella 100\u2013500 Hz. VPF:n amplitudin ja sen <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/harmonics\/\">yliaallot<\/a> antaa t\u00e4rke\u00e4\u00e4 diagnostista tietoa juoksupy\u00f6r\u00e4n kunnosta, hydraulisesta suorituskyvyst\u00e4 ja sis\u00e4isist\u00e4 v\u00e4lyksist\u00e4.<\/p>\n<h2>1. Laskelmat ja tyypilliset arvot<\/h2>\n<h3>Kaava<\/h3>\n<blockquote><p><strong>VPF = N<sub>v<\/sub> \u00d7 N \/ 60<\/strong> &nbsp; jossa N<sub>v<\/sub> = juoksupy\u00f6r\u00e4n siipien lukum\u00e4\u00e4r\u00e4, N = akselin kierrosnopeus kierroksina minuutissa, ja tulos ilmoitetaan hertsein\u00e4.<\/p><\/blockquote>\n<p>Koska VPF on aina kokonaislukukerroin <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/running-speed\/\">k\u00e4yntinopeus<\/a> (1\u00d7), se kuuluu selv\u00e4sti spektrin synkronisiin komponentteihin \u2014 se on todellinen siipitaajuuden harmoni <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/harmonics\/\">harmoninen<\/a> akselin py\u00f6rimisnopeudesta, ei itsen\u00e4isest\u00e4 taajuudesta.<\/p>\n<h3>Ratkaistut esimerkit<\/h3>\n<ul>\n<li><strong>Pieni pumppu:<\/strong> 5 siipi\u00e4 kierrosluvulla 3500 r\/min \u2192 VPF = 5 \u00d7 3500 \/ 60 = <strong>292 Hz<\/strong>.<\/li>\n<li><strong>Suuri prosessipumppu:<\/strong> 7 siipi\u00e4 kierrosluvulla 1750 r\/min \u2192 VPF = 7 \u00d7 1750 \/ 60 = <strong>204 Hz<\/strong>.<\/li>\n<li><strong>Suurnopeuspumppu:<\/strong> 6 siipi\u00e4 kierrosluvulla 4200 r\/min \u2192 VPF = 6 \u00d7 4200 \/ 60 = <strong>420 Hz<\/strong>.<\/li>\n<\/ul>\n<h3>Tyypilliset siipim\u00e4\u00e4r\u00e4t<\/h3>\n<ul>\n<li><strong>Keskipakopumput:<\/strong> 3\u201312 siipi\u00e4, joista 5\u20137 on yleisimpi\u00e4.<\/li>\n<li><strong>Pienet pumput:<\/strong> v\u00e4hemm\u00e4n siipi\u00e4 (3\u20135).<\/li>\n<li><strong>Suuret pumput:<\/strong> enemm\u00e4n siipi\u00e4 (7\u201312).<\/li>\n<li><strong>Korkeapainepumput:<\/strong> enemm\u00e4n siipi\u00e4 energian tehokkaaseen siirtoon.<\/li>\n<\/ul>\n<p>Siipien tarkka lukum\u00e4\u00e4r\u00e4 on ehdottomasti tiedett\u00e4v\u00e4, sill\u00e4 juuri se erottaa VPF:n satunnaisesta akseliharmonisesta; jos juoksupy\u00f6r\u00e4n piirustusta ei ole saatavilla, siipien lukum\u00e4\u00e4r\u00e4 voidaan usein selvitt\u00e4\u00e4 laskemalla harmonisen aallon j\u00e4rjestys, jolla hallitseva hydraulinen huippuarvo esiintyy. <a href=\"https:\/\/vibromera.eu\/fi\/calculators\/blade-pass-frequency\/\">Blade Pass -taajuuslaskuri<\/a> hoitaa laskennan sek\u00e4 pumppujen ett\u00e4 puhaltimien osalta, ja <a href=\"https:\/\/vibromera.eu\/fi\/calculators\/harmonic-frequency-calculator\/\">Harmonisen taajuuden laskin<\/a> auttaa sijoittamaan VPF:n ja sen kerrannaiset taajuusakselille.<\/p>\n<h2>2. Fyysinen mekanismi<\/h2>\n<h3>Paineen vaihtelut<\/h3>\n<p>VPF johtuu pikemminkin paineen vaihtelusta kuin mekaanisesta voimasta. Vaiheiden j\u00e4rjestys on seuraava:<\/p>\n<ol>\n<li>Jokainen juoksupy\u00f6r\u00e4n siipi kuljettaa nestett\u00e4 ulosp\u00e4in suurella nopeudella.<\/li>\n<li>Kun siipi ohittaa spiraalikotelon leikkurin (kielen), se aiheuttaa voimakkaan paineiskun.<\/li>\n<li>Siiven yli vallitseva paine-ero muuttuu tuossa hetkess\u00e4 nopeasti.<\/li>\n<li>T\u00e4m\u00e4 aiheuttaa voimanpulssin sek\u00e4 juoksupy\u00f6r\u00e4\u00e4n ett\u00e4 koteloon.<\/li>\n<li>Kun N<sub>v<\/sub> siivet, N<sub>v<\/sub> t\u00e4llaisia pulsseja esiintyy jokaisella kierroksella.<\/li>\n<li>Tuloksena oleva pulssitaajuus on yht\u00e4 suuri kuin siipien ohitustaajuus \u2013 VPF.<\/li>\n<\/ol>\n<p>T\u00e4m\u00e4 tekee VPF:st\u00e4 yhden klassikoista <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/hydraulic-forces\/\">hydrauliset voimat<\/a> pumpin toimintaan vaikuttava, toisin kuin puhtaasti mekaaniset her\u00e4tteet, kuten <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/unbalance\/\">ep\u00e4tasapaino<\/a> tai laakerivikoja.<\/p>\n<h3>Suunnittelupisteess\u00e4 (BEP)<\/h3>\n<ul>\n<li>Tulovirtauksen kulma vastaa siipikulmaa.<\/li>\n<li>Virtaus on tasaista, ja turbulenssia esiintyy vain v\u00e4h\u00e4n.<\/li>\n<li>VPF-amplitudi on kohtalainen ja vakaa.<\/li>\n<li>Paineen jakautuminen kotelon ymp\u00e4rill\u00e4 on l\u00e4hes optimaalinen.<\/li>\n<\/ul>\n<h3>Suunnittelupisteen ulkopuolella<\/h3>\n<ul>\n<li>Virtauskulma ei en\u00e4\u00e4 vastaa siipikulmaa.<\/li>\n<li>Turbulenssi ja virtauksen irtoaminen lis\u00e4\u00e4ntyv\u00e4t.<\/li>\n<li>Paineen vaihtelut voimistuvat.<\/li>\n<li>VPF:n amplitudi kasvaa, usein uusien taajuuskomponenttien my\u00f6t\u00e4.<\/li>\n<\/ul>\n<h2>3. Diagnostinen tulkinta<\/h2>\n<h3>Normaali VPF-amplitudi<\/h3>\n<ul>\n<li>Pumppu toimii parhaalla hy\u00f6tysuhdepisteell\u00e4\u00e4n (BEP) tai sen l\u00e4hell\u00e4.<\/li>\n<li>VPF:n amplitudi pysyy vakaana per\u00e4kk\u00e4isiss\u00e4 mittauksissa.<\/li>\n<li>Tyypillisesti 10\u201330 % 1\u00d7-v\u00e4r\u00e4htelyamplitudista.<\/li>\n<li>Puhdas taajuusspektri, jossa on mahdollisimman v\u00e4h\u00e4n yliaaltoja.<\/li>\n<\/ul>\n<h3>Mit\u00e4 korkea VPF-arvo kertoo<\/h3>\n<p><strong>Toimii BEP:n ulkopuolella.<\/strong> Pienivirtauksinen k\u00e4ytt\u00f6 (alle noin 70 % BEP:st\u00e4) nostaa VPF-arvoa, samoin kuin suurivirtauksinen k\u00e4ytt\u00f6 (yli noin 120 % BEP:st\u00e4); optimaalinen alue on noin 80\u2013110 % BEP:st\u00e4. Pitk\u00e4kestoinen pienivirtauksinen k\u00e4ytt\u00f6 liittyy my\u00f6s <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/recirculation\/\">sis\u00e4inen kierr\u00e4tys<\/a>.<\/p>\n<p><strong>Juoksupy\u00f6r\u00e4n ja kotelon v\u00e4lisen v\u00e4lyksen ongelmat.<\/strong> Kuluneet kulutusrenkaat tai siipipy\u00f6r\u00e4n siirtyminen <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/bearing-wear\/\">laakerin kuluminen<\/a>, kasvattaa k\u00e4yntiv\u00e4lyst\u00e4; VPF-amplitudi kasvaa v\u00e4lyksen kasvaessa, mihin liittyy suorituskyvyn heikkeneminen sis\u00e4isten vuotojen vuoksi.<\/p>\n<p><strong>Juoksupy\u00f6r\u00e4n vaurio.<\/strong> Rikkoutuneet tai halkeilleet siipipy\u00f6r\u00e4n siivet aiheuttavat ep\u00e4symmetriaa, mik\u00e4 johtaa VPF:\u00e4\u00e4n <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/sidebands\/\">sivunauhat<\/a> \u00b11\u00d7 k\u00e4yntinopeuteen n\u00e4hden; kuluminen, siipien p\u00e4\u00e4lle kertyv\u00e4 aine tai vieraiden esineiden aiheuttamat vauriot vaikuttavat samalla tavalla. N\u00e4m\u00e4 ovat tyypillisi\u00e4 laajemmin <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/impeller-defects\/\">juoksupy\u00f6r\u00e4n viat<\/a>.<\/p>\n<p><strong>Hydraulinen resonanssi.<\/strong> Jos VPF sattuu osumaan yhteen akustisen <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/resonance\/\">resonanssi<\/a> putkistossa tai kotelon resonanssitaajuuden kanssa, amplitudi vahvistuu huomattavasti, mik\u00e4 aiheuttaa toisinaan voimakasta rakenteellista t\u00e4rin\u00e4\u00e4 ja melua, jotka edellytt\u00e4v\u00e4t j\u00e4rjestelm\u00e4n muutoksia.<\/p>\n<h2>4. VPF:n harmoniset ja subharmoniset aallot<\/h2>\n<h3>2\u00d7VPF ja suurempi<\/h3>\n<p>Siipien ohitustaajuuden useat yliaallot ovat varoitusmerkki:<\/p>\n<ul>\n<li><strong>2\u00d7VPF l\u00e4sn\u00e4:<\/strong> viittaa ep\u00e4tasaiseen siipien v\u00e4liseen et\u00e4isyyteen tai juoksupy\u00f6r\u00e4n ep\u00e4keskisyyteen.<\/li>\n<li><strong>Useita yliaaltoja:<\/strong> viittaavat voimakkaaseen hydrauliseen turbulenssiin tai siipien vaurioitumiseen.<\/li>\n<li><strong>Liian suuret amplitudit:<\/strong> nostavat riski\u00e4 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/fatigue\/\">v\u00e4symys<\/a> siipien ja kotelon viat.<\/li>\n<\/ul>\n<h3>Subharmonikot<\/h3>\n<ul>\n<li>Murtoluvut, kuten VPF\/2 tai VPF\/3.<\/li>\n<li>Osoittavat virtauksen ep\u00e4vakaisuuksia, mukaan lukien py\u00f6riv\u00e4 sakkaus ja irtoamissolut.<\/li>\n<li>Yleisin hyvin pienill\u00e4 virtausnopeuksilla, ja samanlainen kuin muut <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/subharmonic\/\">subharmoninen<\/a> ilmi\u00f6t.<\/li>\n<\/ul>\n<h2>5. Seuranta ja kehityssuuntaukset<\/h2>\n<h3>Perustason m\u00e4\u00e4ritt\u00e4minen<\/h3>\n<ul>\n<li>M\u00e4\u00e4rit\u00e4 VPF-arvo, kun pumppu on uusi tai juuri kunnostettu.<\/li>\n<li>Dokumentoi se suunnitteluk\u00e4ytt\u00f6pisteess\u00e4.<\/li>\n<li>M\u00e4\u00e4rit\u00e4 normaali VPF:n ja 1\u00d7:n v\u00e4linen amplitudisuhde.<\/li>\n<li>Aseta h\u00e4lytysrajat, yleens\u00e4 2\u20133-kertaiseksi VPF-amplitudin perusarvoon verrattuna.<\/li>\n<\/ul>\n<h3>Seurattavat parametrit<\/h3>\n<ul>\n<li><strong>VPF-amplitudi:<\/strong> seurataan ajan mittaan; tasainen nousu viittaa kehittyv\u00e4\u00e4n ongelmaan.<\/li>\n<li><strong>VPF\/1\u00d7-suhde:<\/strong> pit\u00e4isi pysy\u00e4 suhteellisen vakaana.<\/li>\n<li><strong>Harmoninen sis\u00e4lt\u00f6:<\/strong> 2\u00d7VPF:n ja 3\u00d7VPF:n esiintyminen tai kasvu.<\/li>\n<li><strong>Sivukaistan kehitys:<\/strong> \u00b11\u00d7-sivukaistojen ilmaantuminen VPF:n ymp\u00e4rille.<\/li>\n<\/ul>\n<h3>Korrelointi k\u00e4ytt\u00f6olosuhteiden kanssa<\/h3>\n<ul>\n<li>Piirr\u00e4 VPF-k\u00e4yr\u00e4 virtausnopeuden funktiona.<\/li>\n<li>M\u00e4\u00e4rit\u00e4 alue, jolla VPF-arvo on pienimmill\u00e4\u00e4n.<\/li>\n<li>Havaitse, milloin k\u00e4ytt\u00f6piste on siirtynyt.<\/li>\n<li>Yhdist\u00e4 VPF:n k\u00e4ytt\u00e4ytyminen mitattuun suorituskyvyn heikkenemiseen.<\/li>\n<\/ul>\n<p>T\u00e4llainen <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/trend-analysis\/\">trendianalyysi<\/a> riippuu johdonmukaisista, toistettavista spektreist\u00e4. Kannettava kaksikanavainen analysaattori, kuten <a href=\"https:\/\/vibromera.eu\/fi\/tuote\/balanset-1\/\">Balanset-1A<\/a> vangitsee <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/spectrum\/\">FFT-spektri<\/a> koska VPF erottuu selv\u00e4sti 100\u2013500 Hz:n taajuusalueella, joten teknikko voi tarkistaa siipipy\u00f6r\u00e4n ohituspiikin, seurata sen amplitudia ja sivukaistoja k\u00e4ynneitt\u00e4in sek\u00e4 sulkea pois mekaaniset <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/unbalance\/\">ep\u00e4tasapaino<\/a> sis\u00e4\u00e4n tai ulos ennen pumpun avaamista.<\/p>\n<h2>6. Korjaavat toimenpiteet<\/h2>\n<h3>Toimintapisteen optimointi<\/h3>\n<ul>\n<li>S\u00e4\u00e4d\u00e4 virtausta niin, ett\u00e4 pumppu toimii l\u00e4hemp\u00e4n\u00e4 optimaalista tehokkuuspistett\u00e4.<\/li>\n<li>Rajoita virtausta tai muuta j\u00e4rjestelm\u00e4n vastusta.<\/li>\n<li>Varmista, ett\u00e4 imuolosuhteet ovat asianmukaiset.<\/li>\n<\/ul>\n<h3>Mekaaninen korjaus<\/h3>\n<ul>\n<li>Vaihda kuluneet kulutusrenkaat, jotta suunnitteluv\u00e4lykset palautuvat.<\/li>\n<li>Vaihda kulunut tai vaurioitunut juoksupy\u00f6r\u00e4.<\/li>\n<li>Korjaa laakeriongelmat, joiden vuoksi juoksupy\u00f6r\u00e4 p\u00e4\u00e4see siirtym\u00e4\u00e4n.<\/li>\n<li>Tarkista juoksupy\u00f6r\u00e4n oikea sijainti sek\u00e4 aksiaalisesti ett\u00e4 s\u00e4teitt\u00e4isesti.<\/li>\n<\/ul>\n<h3>Hydrauliset parannukset<\/h3>\n<ul>\n<li>Paranna imuputkistoa esipy\u00f6rteiden ja turbulenssin v\u00e4hent\u00e4miseksi.<\/li>\n<li>Asenna virtauksen suuntaimet tarvittaessa.<\/li>\n<li>Varmista, ett\u00e4 NPSH-vara on riitt\u00e4v\u00e4, jotta v\u00e4ltyt\u00e4\u00e4n <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/cavitation\/\">kavitaatio<\/a>.<\/li>\n<li>Est\u00e4 ilman joutuminen virtaukseen.<\/li>\n<\/ul>\n<h2>7. Suhde muihin taajuuksiin<\/h2>\n<h3>VPF vs. BPF<\/h3>\n<ul>\n<li>N\u00e4it\u00e4 termej\u00e4 k\u00e4ytet\u00e4\u00e4n usein synonyymein\u00e4 pumppujen ja puhaltimien yhteydess\u00e4.<\/li>\n<li><strong>VPF:<\/strong> pumppujen yleisesti k\u00e4ytetty nimitys (nestett\u00e4 liikuttavat siivet).<\/li>\n<li><strong>BPF:<\/strong> puhaltimien suosima termi (siivet, jotka liikuttavat ilmaa).<\/li>\n<li>Laskelma ja diagnoosimenetelm\u00e4 ovat samat.<\/li>\n<\/ul>\n<h3>VPF suhteessa k\u00e4yntiinopeuteen<\/h3>\n<ul>\n<li>VPF = N<sub>v<\/sub> \u00d7 (k\u00e4yntinopeuden taajuus).<\/li>\n<li>VPF:n taajuus on aina suurempi kuin 1\u00d7.<\/li>\n<li>Esimerkiksi 7-siipisess\u00e4 juoksupy\u00f6r\u00e4ss\u00e4 VPF-arvo on t\u00e4sm\u00e4lleen 7 kertaa k\u00e4yntinopeus.<\/li>\n<\/ul>\n<p>Siipien ohitustaajuus on jokaisen keskipakopumpun keskeisin hydraulinen v\u00e4r\u00e4htelykomponentti. Sen laskennan hallitseminen, normaalien ja kohonneiden amplitudien erottaminen sek\u00e4 sen vaihtelukuvioiden yhdist\u00e4minen sek\u00e4 k\u00e4ytt\u00f6olosuhteisiin ett\u00e4 pumpun kuntoon muuttavat yksitt\u00e4isen spektrihuipun tehokkaaksi diagnoosiv\u00e4lineeksi \u2013 joka ohjaa perusteltujen p\u00e4\u00e4t\u00f6sten tekemist\u00e4 k\u00e4ytt\u00f6pisteen optimoinnissa, v\u00e4lysten palauttamisessa ja juoksupy\u00f6r\u00e4n vaihdossa. Se on laajemman <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/pump-defects\/\">pumpun vianm\u00e4\u00e4ritys<\/a>.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/\">\u2190 Takaisin p\u00e4\u00e4hakemistoon<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Perehdy siiven ohitustaajuuteen (VPF) eli nopeudella, jolla pumpun juoksupy\u00f6r\u00e4n siivet ohittavat kiinte\u00e4n hajottimen tai kierukkaosan leikkausveden. T\u00e4m\u00e4 on olennaista hydraulisten ja mekaanisten ongelmien diagnosoinnissa.<\/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\/fi\/wp-json\/wp\/v2\/glossary\/293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/293\/revisions"}],"predecessor-version":[{"id":101369,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/293\/revisions\/101369"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/media?parent=293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/categories?post=293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/tags?post=293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}