{"id":17311,"date":"2026-08-29T07:52:19","date_gmt":"2026-08-29T07:52:19","guid":{"rendered":"https:\/\/www.dgcrane.com\/?post_type=posts&#038;p=17311"},"modified":"2026-08-29T07:52:22","modified_gmt":"2026-08-29T07:52:22","slug":"casting-crane-fatigue-life-analysis","status":"publish","type":"posts","link":"https:\/\/www.dgcrane.com\/cs\/posts\/casting-crane-fatigue-life-analysis\/","title":{"rendered":"\u00danavov\u00e1 \u017eivotnost odl\u00e9vac\u00edho je\u0159\u00e1bu: Anal\u00fdza t\u0159\u00eddy zat\u00ed\u017een\u00ed a \u017eivotnosti"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Obsah<\/h2><nav><ul><li><a href=\"#overview-for-casting-crane\">P\u0159ehled odl\u00e9vac\u00edho je\u0159\u00e1bu<\/a><\/li><li><a href=\"#casting-crane-fatigue-life-and-service-life-calculation\">V\u00fdpo\u010det \u00fanavov\u00e9 \u017eivotnosti a \u017eivotnosti odl\u00e9vac\u00edho je\u0159\u00e1bu<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"overview-for-casting-crane\">P\u0159ehled odl\u00e9vac\u00edho je\u0159\u00e1bu<\/h2>\n\n\n\n<p>Modern\u00ed technologie taven\u00ed klade vy\u0161\u0161\u00ed n\u00e1roky na \u00fanavovou \u017eivotnost sl\u00e9v\u00e1rensk\u00fdch je\u0159\u00e1b\u016f, rychlosti zved\u00e1n\u00ed a pojezdu a t\u0159\u00eddu zat\u00ed\u017een\u00ed. Zav\u00e1d\u00ed tak\u00e9 nov\u00e9 konstruk\u010dn\u00ed po\u017eadavky na p\u0159evodov\u00e9 syst\u00e9my, elektrick\u00e9 ovl\u00e1d\u00e1n\u00ed, p\u0159evodovky a dal\u0161\u00ed komponenty. S rostouc\u00ed celkovou t\u0159\u00eddou zat\u00ed\u017een\u00ed sl\u00e9v\u00e1rensk\u00e9ho je\u0159\u00e1bu se pro bezpe\u010dn\u00fd a spolehliv\u00fd provoz st\u00e1v\u00e1 nezbytnou prevence \u00fanavov\u00e9ho selh\u00e1n\u00ed v hlavn\u00edch konstruk\u010dn\u00edch prvc\u00edch.<\/p>\n\n\n\n<p>Sl\u00e9v\u00e1rensk\u00fd je\u0159\u00e1b manipuluje s roztaven\u00fdm kovem nebo struskou p\u0159i v\u00fdrob\u011b \u017eelezn\u00fdch a ne\u017eelezn\u00fdch kov\u016f. Mezi typick\u00e9 aplikace pat\u0159\u00ed vs\u00e1zka roztaven\u00e9ho \u017eeleza do konvertoru, p\u0159esun p\u00e1nve do revolverov\u00e9 hlavy pro plynul\u00e9 lit\u00ed a p\u0159esun p\u00e1nve do rafina\u010dn\u00ed pece. Proto\u017ee jsou tyto operace n\u00e1ro\u010dn\u00e9, maj\u00ed sl\u00e9v\u00e1rensk\u00e9 je\u0159\u00e1by obecn\u011b celkovou pracovn\u00ed t\u0159\u00eddu A6\u2013A8.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1068\" height=\"712\" src=\"https:\/\/www.dgcrane.com\/wp-content\/uploads\/2026\/08\/metallurgical-casting-crane_english.png\" alt=\"\" class=\"wp-image-17318\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"casting-crane-fatigue-life-and-service-life-calculation\">V\u00fdpo\u010det \u00fanavov\u00e9 \u017eivotnosti a \u017eivotnosti odl\u00e9vac\u00edho je\u0159\u00e1bu<\/h2>\n\n\n\n<p>Spolehliv\u00fd provoz lic\u00edho je\u0159\u00e1bu z\u00e1vis\u00ed na n\u011bkolika faktorech, v\u010detn\u011b konstrukce, kvality v\u00fdroby, p\u0159esnosti instalace, provozn\u00edch podm\u00ednek, pracovn\u00edch postup\u016f a \u00fadr\u017eby.<\/p>\n\n\n\n<p>Podle \u010d\u00ednsk\u00fdch konstruk\u010dn\u00edch pravidel pro je\u0159\u00e1by GB\/T 3811-2008 je t\u0159\u00edda provozu je\u0159\u00e1bu ur\u010dena jeho t\u0159\u00eddou spektra zat\u00ed\u017een\u00ed a t\u0159\u00eddou vyu\u017eit\u00ed. T\u0159\u00edda spektra zat\u00ed\u017een\u00ed ud\u00e1v\u00e1 vztah mezi zdvi\u017een\u00fdm b\u0159emenem a jmenovitou nosnost\u00ed. T\u0159\u00edda vyu\u017eit\u00ed ud\u00e1v\u00e1 celkov\u00fd po\u010det provozn\u00edch cykl\u016f od uveden\u00ed do provozu do vy\u0159azen\u00ed. Tabulka 1 ukazuje t\u0159\u00eddy spektra zat\u00ed\u017een\u00ed je\u0159\u00e1bu a koeficient spektra zat\u00ed\u017een\u00ed Kp, zat\u00edmco tabulka 2 ukazuje t\u0159\u00eddy vyu\u017eit\u00ed je\u0159\u00e1bu.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.dgcrane.com\/wp-content\/uploads\/2026\/08\/crane-load-spectrum-classes_english.png\" alt=\"\" class=\"wp-image-17319\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.dgcrane.com\/wp-content\/uploads\/2026\/08\/crane-utilization-classes_english.png\" alt=\"\" class=\"wp-image-17320\"><\/figure>\n\n\n\n<p>T\u0159\u00eddy zat\u00ed\u017een\u00ed je\u0159\u00e1bu se pohybuj\u00ed od A1 do A8. Tabulka 3 ukazuje, jak se t\u0159\u00edda zat\u00ed\u017een\u00ed vztahuje k t\u0159\u00edd\u011b spektra zat\u00ed\u017een\u00ed a t\u0159\u00edd\u011b vyu\u017eit\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.dgcrane.com\/wp-content\/uploads\/2026\/08\/crane-duty-class_english.png\" alt=\"\" class=\"wp-image-17321\"><\/figure>\n\n\n\n<p>Tyto tabulky ukazuj\u00ed, \u017ee \u017eivotnost je\u0159\u00e1bu je vyj\u00e1d\u0159ena jako celkov\u00fd po\u010det provozn\u00edch cykl\u016f. Z\u00e1vis\u00ed na t\u0159\u00edd\u011b zat\u00ed\u017een\u00ed a pom\u011bru typick\u00e9ho zdvihan\u00e9ho b\u0159emene k jmenovit\u00e9 nosnosti. Lic\u00ed je\u0159\u00e1b obvykle manipuluje s b\u0159emeny na jmenovit\u00e9 nosnosti nebo bl\u00edzko n\u00ed, tak\u017ee jeho t\u0159\u00edda spektra zat\u00ed\u017een\u00ed je obecn\u011b Q4 a jeho t\u0159\u00edda zat\u00ed\u017een\u00ed je obvykle A7. Pro Q4 a A7 uv\u00e1d\u00ed tabulka 3 t\u0159\u00eddu vyu\u017eit\u00ed U5. Tabulka 2 pak uv\u00e1d\u00ed celkov\u00fd rozsah provozn\u00edch cykl\u016f 2,5 x 10<sup>5<\/sup> &lt;CT \u2264 5 x 10<sup>5<\/sup>.<\/p>\n\n\n\n<p>Ob\u010dasn\u00e9 nebo \u010dast\u00e9 p\u0159et\u00ed\u017een\u00ed m\u016f\u017ee v\u00fdrazn\u011b sn\u00ed\u017eit celkov\u00fd po\u010det provozn\u00edch cykl\u016f.<\/p>\n\n\n\n<p>Zde je p\u0159\u00edklad: Sl\u00e9v\u00e1rensk\u00fd je\u0159\u00e1b A7 pou\u017e\u00edvan\u00fd pro zav\u00e1\u017een\u00ed konvertor\u016f pracuje nep\u0159etr\u017eit\u011b, 24 hodin denn\u011b a 330 dn\u00ed v roce. Zb\u00fdvaj\u00edc\u00edch 35 dn\u00ed zahrnuje ro\u010dn\u00ed gener\u00e1ln\u00ed opravy a kontrolu pece, b\u011b\u017enou \u00fadr\u017ebu a ob\u010dasn\u00e9 opravy.<\/p>\n\n\n\n<p>Podle normy jsou dv\u011b nejvy\u0161\u0161\u00ed platn\u00e9 klasifikace U6, Q3, A7 pro kompletn\u00ed je\u0159\u00e1b (T6, L3, M7 pro hlavn\u00ed zdvihac\u00ed mechanismus) a U5, Q4, A7 pro kompletn\u00ed je\u0159\u00e1b (T5, L4, M7 pro hlavn\u00ed zdvihac\u00ed mechanismus).<\/p>\n\n\n\n<p>Odpov\u00eddaj\u00edc\u00ed celkov\u00fd po\u010det provozn\u00edch cykl\u016f je 500 000\u20131 000 000 pro U6 a 250 000\u2013500 000 pro U5.<\/p>\n\n\n\n<p>P\u0159i \u0161esti provozn\u00edch cyklech za hodinu je odhadovan\u00e1 konstruk\u010dn\u00ed \u017eivotnost 12 let.<\/p>\n\n\n\n<p>Cr = 6 \u00d7 24 \u00d7 330 \u00d7 12 = 570 240 cykl\u016f.<\/p>\n\n\n\n<p>Tento v\u00fdsledek spad\u00e1 do rozsahu n\u00e1vrhov\u00e9 \u017eivotnosti pro jednu klasifikaci a pro druhou ji p\u0159ekra\u010duje, zat\u00edmco ob\u011b klasifikace spl\u0148uj\u00ed n\u00e1vrhovou normu. V praxi mnoho sl\u00e9v\u00e1rensk\u00fdch je\u0159\u00e1b\u016f pro vs\u00e1zku konvertor\u016f pracovalo b\u011bhem obdob\u00ed intenzivn\u00ed v\u00fdroby oceli v re\u017eimu bl\u00edzk\u00e9m A8. Uveden\u00e9 kombinace t\u0159\u00edd zat\u00ed\u017een\u00ed nemohly tyto podm\u00ednky pln\u011b pokr\u00fdt a \u010das od \u010dasu doch\u00e1zelo k \u00fanavov\u00fdm poruch\u00e1m konstrukce.<\/p>\n\n\n\n<p>Konstruk\u010dn\u00ed \u017eivotnost je\u0159\u00e1bu \u00fazce souvis\u00ed s provozn\u00ed frekvenc\u00ed, zat\u00ed\u017een\u00edm, v\u00fdrobn\u00edm procesem a \u00fadr\u017ebou. Spr\u00e1vn\u00fd provoz a \u00fadr\u017eba mohou \u017eivotnost prodlou\u017eit, zat\u00edmco nespr\u00e1vn\u00e9 postupy ji zkracuj\u00ed. Konstrukt\u00e9\u0159i by proto m\u011bli zv\u00e1\u017eit skute\u010dn\u00e9 provozn\u00ed podm\u00ednky a b\u011bhem f\u00e1ze n\u00e1vrhu je jasn\u011b prodiskutovat s u\u017eivateli.<\/p>","protected":false},"excerpt":{"rendered":"P\u0159ehled sl\u00e9v\u00e1rensk\u00fdch je\u0159\u00e1b\u016f Modern\u00ed technologie taven\u00ed klade vy\u0161\u0161\u00ed n\u00e1roky na \u00fanavovou \u017eivotnost sl\u00e9v\u00e1rensk\u00fdch je\u0159\u00e1b\u016f, rychlosti zved\u00e1n\u00ed a pojezdu a t\u0159\u00eddu zat\u00ed\u017een\u00ed. Zav\u00e1d\u00ed tak\u00e9 nov\u00e9 konstruk\u010dn\u00ed po\u017eadavky na p\u0159evodov\u00e9 syst\u00e9my, elektrick\u00e9 ovl\u00e1d\u00e1n\u00ed, p\u0159evodovky a dal\u0161\u00ed komponenty. S rostouc\u00ed celkovou t\u0159\u00eddou zat\u00ed\u017een\u00ed sl\u00e9v\u00e1rensk\u00fdch je\u0159\u00e1b\u016f se st\u00e1v\u00e1 nezbytnou prevenc\u00ed \u00fanavov\u00e9ho selh\u00e1n\u00ed v hlavn\u00edch konstruk\u010dn\u00edch prvc\u00edch [\u2026]","protected":false},"featured_media":17318,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[351],"posts_tag":[1067,206,6],"class_list":["post-17311","posts","type-posts","status-publish","has-post-thumbnail","hentry","posts_category-blog","posts_tag-casting-crane","posts_tag-dgcrane","posts_tag-overhead-crane"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts\/17311"}],"collection":[{"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":2,"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts\/17311\/revisions"}],"predecessor-version":[{"id":17322,"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts\/17311\/revisions\/17322"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/media\/17318"}],"wp:attachment":[{"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/media?parent=17311"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/posts_category?post=17311"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.dgcrane.com\/cs\/wp-json\/wp\/v2\/posts_tag?post=17311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}