{"id":6882,"date":"2021-02-10T14:28:20","date_gmt":"2021-02-10T12:28:20","guid":{"rendered":"https:\/\/blog.federnshop.com\/druhy-napeti-pro-tazne-pruziny\/"},"modified":"2021-02-10T14:28:25","modified_gmt":"2021-02-10T12:28:25","slug":"druhy-napeti-pro-tazne-pruziny","status":"publish","type":"post","link":"https:\/\/blog.federnshop.com\/cs\/druhy-napeti-pro-tazne-pruziny\/","title":{"rendered":"Druhy nap\u011bt\u00ed pro ta\u017en\u00e9 pru\u017einy"},"content":{"rendered":"<p><a href=\"https:\/\/blog.federnshop.com\/wp-content\/uploads\/Formelzeichen_Zugfedern_komplett.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6876\" src=\"https:\/\/blog.federnshop.com\/wp-content\/uploads\/Hubspannung_Zugfeder.jpg\" alt=\"Prodlou\u017een\u00ed nap\u00ednac\u00ed pru\u017einy zdvihu\" width=\"600\" height=\"345\" data-wp-pid=\"1930\" srcset=\"https:\/\/blog.federnshop.com\/wp-content\/uploads\/Hubspannung_Zugfeder.jpg 800w, https:\/\/blog.federnshop.com\/wp-content\/uploads\/Hubspannung_Zugfeder-300x173.jpg 300w, https:\/\/blog.federnshop.com\/wp-content\/uploads\/Hubspannung_Zugfeder-600x345.jpg 600w, https:\/\/blog.federnshop.com\/wp-content\/uploads\/Hubspannung_Zugfeder-400x230.jpg 400w, https:\/\/blog.federnshop.com\/wp-content\/uploads\/Hubspannung_Zugfeder-200x115.jpg 200w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p style=\"text-align: right;\"><a href=\"https:\/\/blog.federnshop.com\/wp-content\/uploads\/Formelzeichen_Zugfedern_komplett.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Popis Symbol nap\u00ednac\u00edch pru\u017ein<\/a><\/p>\n<p>P\u0159ed interpretac\u00ed<a href=\"https:\/\/blog.federnshop.com\/cs\/informacni-tazne-pruziny\/\"> ta\u017en\u00e1 pru\u017eina<\/a> je t\u0159eba objasnit, zda je zam\u00fd\u0161len\u00fdm typem stresu a<strong> statick\u00fd<\/strong> nebo a<strong> dynamick\u00e9 nap\u011bt\u00ed<\/strong> \u010diny.<\/p>\n<p>Pro dynamick\u00e1 zat\u00ed\u017een\u00ed na ta\u017en\u00e9 pru\u017einy nelze uv\u00e9st \u017e\u00e1dn\u00e9 obecn\u00e9 hodnoty \u00fanavov\u00e9 pevnosti, nap\u0159<a href=\"https:\/\/blog.federnshop.com\/cs\/informacni-tazne-pruziny\/\"> Ohybov\u00e9 body o\u010dka<\/a> mohou nastat dal\u0161\u00ed nap\u011bt\u00ed, z nich\u017e n\u011bkter\u00e1 p\u0159ekra\u010duj\u00ed povolen\u00e1 nap\u011bt\u00ed. Ta\u017en\u00e9 pru\u017einy by proto m\u011bly b\u00fdt pokud mo\u017eno vystaveny statick\u00e9mu zat\u00ed\u017een\u00ed. Pokud se nelze vyhnout dynamick\u00e9mu nam\u00e1h\u00e1n\u00ed, m\u011blo by se jednat o \u00fahel<a href=\"https:\/\/blog.federnshop.com\/cs\/tazne-pruziny-s-ockem\/\"> O\u010dka<\/a> z\u0159eknout se a<a href=\"https:\/\/blog.federnshop.com\/cs\/tazne-pruziny-s-ockem\/\"> v\u00e1lcovan\u00e9 nebo na\u0161roubovan\u00e9 koncov\u00e9 d\u00edly<\/a> nasadit. Pokud jsou ta\u017en\u00e9 pru\u017einy vystaveny dynamick\u00e9mu zat\u00ed\u017een\u00ed, je d\u016fle\u017eit\u00e1 zkou\u0161ka \u017eivotnosti za pozd\u011bj\u0161\u00edch provozn\u00edch podm\u00ednek. Zes\u00edlen\u00ed povrchu trysk\u00e1n\u00edm nelze prov\u00e9st nebo jen s velk\u00fdm \u00fasil\u00edm kv\u016fli t\u011bsn\u011b rozm\u00edst\u011bn\u00fdm zat\u00e1\u010dk\u00e1m.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.federnshop.com\/cs\/druhy-napeti-pro-tazne-pruziny\/#Staticke_namahani_tazne_pruziny\" >Statick\u00e9 nam\u00e1h\u00e1n\u00ed ta\u017en\u00e9 pru\u017einy<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.federnshop.com\/cs\/druhy-napeti-pro-tazne-pruziny\/#Dynamicke_namahani_tazne_pruziny\" >Dynamick\u00e9 nam\u00e1h\u00e1n\u00ed ta\u017en\u00e9 pru\u017einy<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Staticke_namahani_tazne_pruziny\"><\/span>Statick\u00e9 nam\u00e1h\u00e1n\u00ed ta\u017en\u00e9 pru\u017einy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u010casov\u011b konstantn\u00ed (statick\u00e9) zat\u00ed\u017een\u00ed nebo \u010dasov\u011b prom\u011bnn\u00e9 zat\u00ed\u017een\u00ed s m\u00e9n\u011b ne\u017e 10 000 zdvihy celkov\u00e9ho nebo mal\u00e9ho zdvihu (\u03c4h = \u03c42 &#8211; \u03c41) a\u017e 0,1 x \u00fanavov\u00e1 pevnost (\u03c4kh = \u03c4k2 &#8211; \u03c4k1).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dynamicke_namahani_tazne_pruziny\"><\/span>Dynamick\u00e9 nam\u00e1h\u00e1n\u00ed ta\u017en\u00e9 pru\u017einy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Dynamick\u00e9 nap\u011bt\u00ed na pru\u017ein\u00e1ch je definov\u00e1no jako nap\u011bt\u00ed, kter\u00e9 se v pr\u016fb\u011bhu \u010dasu m\u011bn\u00ed s v\u00edce ne\u017e 10 000 zm\u011bnami zat\u00ed\u017een\u00ed nebo tahov\u00e1 nap\u011bt\u00ed (\u03c4h) nad 0,1 x \u00fanavov\u00e1 pevnost (\u03c4kh) s konstantn\u00edm a prom\u011bnn\u00fdm tahov\u00fdm nap\u011bt\u00edm.<\/p>\n<p>St\u00e1vaj\u00edc\u00ed smykov\u00e9 nap\u011bt\u00ed se stanov\u00ed n\u00e1sledovn\u011b.<\/p>\n<p>Smykov\u00e9 nap\u011bt\u00ed od s\u00edly: <img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"https:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Ctau%3D%5Cfrac%7B8DF%7D%7B%5Cpi%20d%5E%7B3%7D%7D\" alt=\"\\ tau = \\ frac wpml_curved wpml_value = '8DF' \/ wpml_curved {\\ pi d ^ wpml_curved wpml_value = '3' \/ wpml_curved }\" align=\"absmiddle\"><\/p>\n<p>Smykov\u00e9 nap\u011bt\u00ed z dr\u00e1hy: <img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"https:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Ctau%3D%5Cfrac%7BGds%7D%7B%5Cpi%20nD%5E%7B2%7D%7D\" alt=\"\\ tau = \\ frac wpml_curved wpml_value = 'Gds' \/ wpml_curved {\\ pi nD ^ wpml_curved wpml_value = '2' \/ wpml_curved }\" align=\"absmiddle\"><\/p>\n<p>U dynamick\u00e9ho zat\u00ed\u017een\u00ed je t\u0159eba vypo\u010d\u00edtat opraven\u00e9 nap\u011bt\u00ed zdvihu z d\u016fvodu zv\u00fd\u0161en\u00ed nap\u011bt\u00ed.<\/p>\n<p>Opraven\u00e9 smykov\u00e9 nap\u011bt\u00ed: <img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"https:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Ctau_%7B%7Bk%7D%7D%3Dk%5Ctau\" alt=\"\\ dew_ {} = k \\ tau\" align=\"absmiddle\"><\/p>\n<p>Opraven\u00e9 zdvihov\u00e9 nap\u011bt\u00ed: \u03c4kh = \u03c4k2 &#8211; \u03c4k1<\/p>\n<p>Kde plat\u00ed k (podle Bergstr\u00e4ssera):<\/p>\n<p><img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"https:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=k%3D%5Cfrac%7B%5Cfrac%7BD%7D%7Bd%7D%2B0%2C5%7D%7B%5Cfrac%7BD%7D%7Bd%7D-0%2C75%7D\" alt=\"k = \\ frac {\\ frac wpml_curved wpml_value = 'D' \/ wpml_curved wpml_curved wpml_value = 'd' \/ wpml_curved +0,5} {\\ frac wpml_curved wpml_value = 'D' \/ wpml_curved wpml_curved wpml_value = 'd' \/ wpml_curved -0,75}\" align=\"absmiddle\"><\/p>\n<p>Pomoc\u00ed korek\u010dn\u00edho faktoru nap\u011bt\u00ed k, kter\u00fd z\u00e1vis\u00ed na pom\u011bru vinut\u00ed (pom\u011br st\u0159edn\u00edho pr\u016fm\u011bru k tlou\u0161\u0165ce dr\u00e1tu) pru\u017einy, lze p\u0159ibli\u017en\u011b ur\u010dit nejvy\u0161\u0161\u00ed nap\u011bt\u00ed.<\/p>\n<p>P\u0159\u00edpustn\u00e9 nap\u011bt\u00ed: <img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"https:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Ctau_%7B%7Bzul%7D%7D%3D0%2C45%20%5Ccdot%20R_%7B%7Bm%7D%7D\" alt=\"\\ dew_ {} = 0,45 \\ cdot R_ {}\" align=\"absmiddle\"><\/p>\n<p><a href=\"https:\/\/blog.federnshop.com\/zugfestigkeit-federwerkstoffe\/\" target=\"_blank\" rel=\"noopener noreferrer\">Minim\u00e1ln\u00ed hodnoty pevnosti v tahu pru\u017einov\u00fdch materi\u00e1l\u016f <img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"https:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=R_%7B%7Bm%7D%7D\" alt=\"R_ {}\" align=\"absmiddle\"> <\/a><\/p>\n<p>St\u00e1vaj\u00edc\u00ed maxim\u00e1ln\u00ed nap\u011bt\u00ed \u03c4n p\u0159i nejv\u011bt\u0161\u00edm vych\u00fdlen\u00ed pru\u017einy sn se rovn\u00e1 p\u0159\u00edpustn\u00e9mu nap\u011bt\u00ed. K tomu<a href=\"https:\/\/blog.federnshop.com\/cs\/relaxace-v-pramenech\/\" target=\"_blank\" rel=\"noopener noreferrer\"> relaxace<\/a> Aby se tomu zabr\u00e1nilo, m\u011blo by se v praxi pou\u017e\u00edt pouze 80% tohoto pojezdu pru\u017einy.<\/p>\n<p><img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"https:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=s_%7B%7B2%7D%7D%3D0%2C8%5Ccdot%20s_%7B%7Bn%7D%7D\" alt=\"s_ {} = 0,8 \\ cdot s_ {}\" align=\"absmiddle\"><\/p>\n<p>&nbsp;<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/cqsZmGz7Tng\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>Zaj\u00edmav\u00e9 odkazy:<\/p>\n<ul>\n<li><a href=\"https:\/\/blog.federnshop.com\/cs\/druhy-tlakovych-pruzin\/\">Druhy tlakov\u00fdch pru\u017ein<\/a><\/li>\n<\/ul>\n<ul>\n<li><a href=\"https:\/\/www.federnshop.com\/de\/federberechnung-auswahl.html\" target=\"_blank\" rel=\"noopener noreferrer\">V\u00fdpo\u010det Gutekunstovy pru\u017einy WinFSB<\/a><\/li>\n<\/ul>\n<ul>\n<li><a href=\"https:\/\/www.federnshop.com\/de\/service_informationen\/federnauslegung.html\" target=\"_blank\" rel=\"noopener noreferrer\">Pru\u017einy design<\/a><\/li>\n<\/ul>\n<ul>\n<li><a href=\"https:\/\/www.federnshop.com\/de\/service-und-informationen\/technische-beratung.html\" target=\"_blank\" rel=\"noopener noreferrer\">Technick\u00e9 rady od Gutekunst Federn<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Popis Symbol nap\u00ednac\u00edch pru\u017ein P\u0159ed interpretac\u00ed ta\u017en\u00e1 pru\u017eina je t\u0159eba objasnit, zda je zam\u00fd\u0161len\u00fdm typem stresu a statick\u00fd nebo a dynamick\u00e9 nap\u011bt\u00ed \u010diny. Pro dynamick\u00e1 zat\u00ed\u017een\u00ed na ta\u017en\u00e9 pru\u017einy nelze uv\u00e9st \u017e\u00e1dn\u00e9 obecn\u00e9 hodnoty \u00fanavov\u00e9 pevnosti, nap\u0159 Ohybov\u00e9 body o\u010dka<\/p>\n","protected":false},"author":4,"featured_media":6884,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[919,923,922,452],"tags":[1472,1237,560,1473,609,1601],"class_list":["post-6882","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dratene-pruziny","category-nekonecne-tazne-pruziny","category-tazne-pruziny","category-znalost","tag-dynamische-beanspruchung-cs","tag-oesenformen-cs-2","tag-schubspannung-cs","tag-statische-beanspruchung-cs","tag-zugfedern-cs","tag-zvedaci-napeti"],"_links":{"self":[{"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/posts\/6882","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/comments?post=6882"}],"version-history":[{"count":1,"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/posts\/6882\/revisions"}],"predecessor-version":[{"id":6885,"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/posts\/6882\/revisions\/6885"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/media\/6884"}],"wp:attachment":[{"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/media?parent=6882"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/categories?post=6882"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.federnshop.com\/cs\/wp-json\/wp\/v2\/tags?post=6882"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}