{"id":16017,"date":"2026-09-09T06:46:06","date_gmt":"2026-09-09T06:46:06","guid":{"rendered":"https:\/\/www.hndfcrane.com\/?post_type=posts&#038;p=16017"},"modified":"2026-09-09T09:40:34","modified_gmt":"2026-09-09T09:40:34","slug":"crane-drum-web-to-shaft-weld-crack-cause-analysis","status":"publish","type":"posts","link":"https:\/\/www.hndfcrane.com\/cs\/posts\/crane-drum-web-to-shaft-weld-crack-cause-analysis\/","title":{"rendered":"Anal\u00fdza p\u0159\u00ed\u010din trhlin ve svarech mezi stojinou a h\u0159\u00eddel\u00ed je\u0159\u00e1bov\u00e9ho bubnu"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>Obsah<\/p><nav><ul><li><a href=\"#1-relationship-between-the-crane-drum-web-plate-hub-and-shaft\">1. Vztah mezi je\u0159\u00e1bov\u00fdm bubnem, stojinou, n\u00e1bojem a h\u0159\u00eddel\u00ed<\/a><\/li><li><a href=\"#2-why-the-crack-appears-near-the-drum-shaft-side\">2. Pro\u010d se trhlina objevuje pobl\u00ed\u017e strany h\u0159\u00eddele bubnu<\/a><ul><li><a href=\"#2-1-stress-concentration-from-a-sudden-section-change\">2.1 Koncentrace nap\u011bt\u00ed v d\u016fsledku n\u00e1hl\u00e9 zm\u011bny pr\u016f\u0159ezu<\/a><\/li><li><a href=\"#2-2-cyclic-stress-and-impact-loading\">2.2 Cyklick\u00e9 nam\u00e1h\u00e1n\u00ed a r\u00e1zov\u00e9 zat\u00ed\u017een\u00ed<\/a><\/li><li><a href=\"#2-3-welding-residual-stress\">2.3 Zbytkov\u00e9 nap\u011bt\u00ed p\u0159i sva\u0159ov\u00e1n\u00ed<\/a><\/li><\/ul><\/li><li><a href=\"#3-development-process-of-the-web-plate-crack\">3. Proces v\u00fdvoje trhliny v stojin\u011b<\/a><\/li><li><a href=\"#4-common-causes-of-crane-drum-web-to-shaft-weld-cracking\">4. B\u011b\u017en\u00e9 p\u0159\u00ed\u010diny prask\u00e1n\u00ed svar\u016f mezi stojinou a h\u0159\u00eddel\u00ed je\u0159\u00e1bov\u00e9ho bubnu<\/a><ul><li><a href=\"#4-1-structural-design-factors\">4.1 Faktory konstruk\u010dn\u00edho n\u00e1vrhu<\/a><\/li><li><a href=\"#4-2-welding-quality-factors\">4.2 Faktory kvality sva\u0159ov\u00e1n\u00ed<\/a><\/li><li><a href=\"#4-3-operating-loads-beyond-design-conditions\">4.3 Provozn\u00ed zat\u00ed\u017een\u00ed nad r\u00e1mec n\u00e1vrhov\u00fdch podm\u00ednek<\/a><\/li><li><a href=\"#4-4-manufacturing-and-assembly-errors\">4.4 Chyby p\u0159i v\u00fdrob\u011b a mont\u00e1\u017ei<\/a><\/li><li><a href=\"#4-5-corrosion-and-environmental-factors\">4.5 Koroze a faktory prost\u0159ed\u00ed<\/a><\/li><\/ul><\/li><li><a href=\"#5-inspection-repair-and-prevention-measures\">5. Inspekce, opravy a preventivn\u00ed opat\u0159en\u00ed<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>Tato anal\u00fdza trhlin ve svarov\u00e9m spoji bubnu je\u0159\u00e1bu zkoum\u00e1 p\u0159\u00edpad, kdy u dlouhodob\u011b provozovan\u00e9ho je\u0159\u00e1bu do\u0161lo ke vzniku trhlin ve svarov\u00e9m spoji mezi stojinou bubnu a h\u0159\u00eddel\u00ed bubnu. A\u010dkoli se viditeln\u00e9 po\u0161kozen\u00ed jev\u00ed jako lok\u00e1ln\u00ed probl\u00e9m s \u00fanavou kovu, z\u00e1kladn\u00ed p\u0159\u00ed\u010diny mohou zahrnovat konstruk\u010dn\u00ed n\u00e1vrh, postup sva\u0159ov\u00e1n\u00ed, stav materi\u00e1lu, p\u0159enos nap\u011bt\u00ed, kvalitu v\u00fdroby a mont\u00e1\u017ee a provozn\u00ed podm\u00ednky.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"720\" src=\"https:\/\/www.hndfcrane.com\/wp-content\/uploads\/2026\/09\/Cracking-of-the-weld-between-the-drum-web-and-the-drum-shaft.jpg\" alt=\"\" class=\"wp-image-16020\"\/><figcaption class=\"wp-element-caption\">P\u0159\u00edpad trhliny ve svarov\u00e9m spoji mezi stojinou je\u0159\u00e1bov\u00e9ho bubnu a h\u0159\u00eddel\u00ed<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1477\" height=\"1065\" src=\"https:\/\/www.hndfcrane.com\/wp-content\/uploads\/2026\/09\/Schematic-diagram-of-the-cracking-location-in-the-weld-between-the-drum-web-and-the-drum-shaft.png\" alt=\"\" class=\"wp-image-16021\"\/><figcaption class=\"wp-element-caption\">Um\u00edst\u011bn\u00ed trhliny na desce stojiny bubnu a svaru h\u0159\u00eddele bubnu<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-relationship-between-the-crane-drum-web-plate-hub-and-shaft\">1. Vztah mezi je\u0159\u00e1bov\u00fdm bubnem, stojinou, n\u00e1bojem a h\u0159\u00eddel\u00ed<\/h2>\n\n\n\n<p>Ve zdvihac\u00edch za\u0159\u00edzen\u00edch je buben kl\u00ed\u010dov\u00fdm p\u0159evodov\u00fdm prvkem pou\u017e\u00edvan\u00fdm k nav\u00edjen\u00ed ocelov\u00e9ho lana a zved\u00e1n\u00ed nebo tah\u00e1n\u00ed b\u0159emene. Pl\u00e1\u0161\u0165 bubnu nese ocelov\u00e9 lano, zat\u00edmco na obou konc\u00edch pl\u00e1\u0161t\u011b jsou obvykle uspo\u0159\u00e1d\u00e1ny stojinov\u00e9 desky, kter\u00e9 spojuj\u00ed pl\u00e1\u0161\u0165 s n\u00e1bojem nebo h\u0159\u00eddel\u00ed.<\/p>\n\n\n\n<p>V b\u011b\u017en\u00e9 konstrukci je n\u00e1boj p\u0159iva\u0159en ke st\u0159edu stojiny. N\u00e1boj je pot\u00e9 spojen s h\u0159\u00eddel\u00ed bubnu pomoc\u00ed pera a h\u0159\u00eddel je podep\u0159ena lo\u017eisky. V tomto p\u0159\u00edpad\u011b je stojina p\u0159iva\u0159ena p\u0159\u00edmo k h\u0159\u00eddeli bubnu a h\u0159\u00eddel bubnu je dlouh\u00e1 h\u0159\u00eddel.<\/p>\n\n\n\n<p>Stojinov\u00e1 deska tedy nen\u00ed jen spojovac\u00ed deskou. Tak\u00e9 p\u0159en\u00e1\u0161\u00ed kroutic\u00ed moment a radi\u00e1ln\u00ed s\u00edlu mezi pl\u00e1\u0161t\u011bm bubnu a h\u0159\u00eddel\u00ed bubnu. Obecn\u00e9 reference o poruch\u00e1ch bubnu \u010dasto zmi\u0148uj\u00ed \u00fanavov\u00e9 trhliny jako podm\u00ednku n\u00e1hrady; tento p\u0159\u00edpad se konkr\u00e9tn\u011bji zab\u00fdv\u00e1 t\u00edm, pro\u010d m\u016f\u017ee prask\u00e1n\u00ed vzniknout kolem svaru mezi stojinovou deskou a h\u0159\u00eddel\u00ed. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"2-why-the-crack-appears-near-the-drum-shaft-side\">2. Pro\u010d se trhlina objevuje pobl\u00ed\u017e strany h\u0159\u00eddele bubnu<\/h2>\n\n\n\n<p>Z mechanick\u00e9ho hlediska je stojina bubnu tenk\u00e1 deska vystaven\u00e1 krutu, ohybu, tahu a stla\u010den\u00ed a rovinn\u00e9mu smyku. V bl\u00edzkosti h\u0159\u00eddele bubnu se m\u016f\u017ee vyskytnout n\u011bkolik nep\u0159\u00edzniv\u00fdch podm\u00ednek sou\u010dasn\u011b: n\u00e1hl\u00e1 zm\u011bna pr\u016f\u0159ezu, vliv svaru a cyklick\u00e9 zat\u00ed\u017een\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-1-stress-concentration-from-a-sudden-section-change\">2.1 Koncentrace nap\u011bt\u00ed v d\u016fsledku n\u00e1hl\u00e9 zm\u011bny pr\u016f\u0159ezu<\/h3>\n\n\n\n<p>V oblasti bl\u00edzko h\u0159\u00eddele bubnu p\u0159ech\u00e1z\u00ed konstrukce z relativn\u011b tlust\u00e9 h\u0159\u00eddele na ten\u010d\u00ed stojinu. Pro axi\u00e1ln\u00ed polohov\u00e1n\u00ed a sva\u0159ov\u00e1n\u00ed je v odpov\u00eddaj\u00edc\u00ed poloze stojiny \u010dasto uspo\u0159\u00e1d\u00e1no osazen\u00ed h\u0159\u00eddele. Pokud je polom\u011br p\u0159echodu p\u0159\u00edli\u0161 mal\u00fd nebo p\u0159echod nen\u00ed plynul\u00fd, m\u016f\u017ee doj\u00edt ke koncentraci nap\u011bt\u00ed.<\/p>\n\n\n\n<p>Vady svaru, jako je pod\u0159ez\u00e1n\u00ed a ne\u00fapln\u00e9 prova\u0159en\u00ed, se mohou tak\u00e9 st\u00e1t zdroji iniciace trhlin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-2-cyclic-stress-and-impact-loading\">2.2 Cyklick\u00e9 nam\u00e1h\u00e1n\u00ed a r\u00e1zov\u00e9 zat\u00ed\u017een\u00ed<\/h3>\n\n\n\n<p>Kdy\u017e buben pracuje, tahov\u00e1 s\u00edla generovan\u00e1 nav\u00edjen\u00edm ocelov\u00e9ho lana se p\u0159en\u00e1\u0161\u00ed p\u0159es pl\u00e1\u0161\u0165 bubnu na stojinu a pot\u00e9 na h\u0159\u00eddel bubnu. Ka\u017ed\u00e9 nav\u00edjen\u00ed a zved\u00e1n\u00ed opakovan\u011b zat\u011b\u017euje tuto oblast, co\u017e m\u016f\u017ee p\u016fsobit jako n\u00edzkocyklov\u00e1 \u00fanava v kombinaci s lok\u00e1ln\u00edm r\u00e1zov\u00fdm zat\u00ed\u017een\u00edm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-3-welding-residual-stress\">2.3 Zbytkov\u00e9 nap\u011bt\u00ed p\u0159i sva\u0159ov\u00e1n\u00ed<\/h3>\n\n\n\n<p>Kdy\u017e jsou stojinov\u00e1 deska a h\u0159\u00eddel bubnu sva\u0159eny dohromady, doch\u00e1z\u00ed v oblasti svaru k lok\u00e1ln\u00edmu smr\u0161t\u011bn\u00ed v d\u016fsledku vysok\u00e9 teploty a ochlazov\u00e1n\u00ed. Pokud sva\u0159ovan\u00e1 konstrukce nen\u00ed po sva\u0159ov\u00e1n\u00ed zcela \u017e\u00edh\u00e1na nebo uvoln\u011bna z pnut\u00ed, z\u016fst\u00e1v\u00e1 kolem svaru zbytkov\u00e9 tahov\u00e9 nap\u011bt\u00ed. Pokud se toto zbytkov\u00e9 tahov\u00e9 nap\u011bt\u00ed superponuje k provozn\u00edmu zat\u00ed\u017een\u00ed, je pravd\u011bpodobn\u011bj\u0161\u00ed vznik trhliny.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"3-development-process-of-the-web-plate-crack\">3. Proces v\u00fdvoje trhliny v stojin\u011b<\/h2>\n\n\n\n<p>V\u00fdvoj trhliny lze rozd\u011blit do t\u0159\u00ed f\u00e1z\u00ed.<\/p>\n\n\n\n<p>Prvn\u00ed f\u00e1z\u00ed je iniciace. V ko\u0159eni svaru nebo v p\u0159echodov\u00e9m polom\u011bru se mikroskopick\u00e9 defekty mohou st\u00e1t zdroji trhlin v d\u016fsledku kombinovan\u00e9ho p\u016fsoben\u00ed zbytkov\u00e9ho nap\u011bt\u00ed p\u0159i sva\u0159ov\u00e1n\u00ed a pracovn\u00edho nap\u011bt\u00ed.<\/p>\n\n\n\n<p>Druhou f\u00e1z\u00ed je \u0161\u00ed\u0159en\u00ed. B\u011bhem ka\u017ed\u00e9ho zved\u00e1n\u00ed se zat\u00ed\u017een\u00ed p\u0159en\u00e1\u0161\u00ed po stejn\u00e9 dr\u00e1ze a vrchol nap\u011bt\u00ed se opakuje. Trhlina se postupn\u011b \u0161\u00ed\u0159\u00ed pod\u00e9l hranice zrn materi\u00e1lu. Lomov\u00e1 plocha m\u016f\u017ee vykazovat radi\u00e1ln\u00ed nebo sko\u0159epinov\u00e9 rysy.<\/p>\n\n\n\n<p>T\u0159et\u00ed f\u00e1z\u00ed je lom. Kdy\u017e zb\u00fdvaj\u00edc\u00ed \u00fa\u010dinn\u00fd pr\u016f\u0159ez ji\u017e nen\u00ed dostate\u010dn\u00fd k \u00fanosnosti zat\u00ed\u017een\u00ed, m\u016f\u017ee doj\u00edt k n\u00e1hl\u00e9mu k\u0159ehk\u00e9mu lomu, kter\u00fd m\u016f\u017ee b\u00fdt doprov\u00e1zen odtr\u017een\u00edm stojiny nebo odd\u011blen\u00edm od h\u0159\u00eddele bubnu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"4-common-causes-of-crane-drum-web-to-shaft-weld-cracking\">4. B\u011b\u017en\u00e9 p\u0159\u00ed\u010diny prask\u00e1n\u00ed svar\u016f mezi stojinou a h\u0159\u00eddel\u00ed je\u0159\u00e1bov\u00e9ho bubnu<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-1-structural-design-factors\">4.1 Faktory konstruk\u010dn\u00edho n\u00e1vrhu<\/h3>\n\n\n\n<p>Pokud p\u0159echod mezi stojinou a n\u00e1bojem nebo h\u0159\u00eddel\u00ed bubnu nevyu\u017e\u00edv\u00e1 p\u0159im\u011b\u0159en\u00fd polom\u011br, m\u016f\u017ee se nap\u011bt\u00ed n\u00e1hle zm\u011bnit. Pokud je tlou\u0161\u0165ka stojiny nedostate\u010dn\u00e1, m\u016f\u017ee b\u00fdt tak\u00e9 nedostate\u010dn\u00e1 rezerva \u00fanavov\u00e9 pevnosti. \u0160patn\u011b zvolen\u00e9 m\u00edsto svaru m\u016f\u017ee riziko d\u00e1le zv\u00fd\u0161it, zejm\u00e9na pokud se svar nach\u00e1z\u00ed v z\u00f3n\u011b s vysok\u00fdm nap\u011bt\u00edm, nikoli v oblasti s ni\u017e\u0161\u00edm nap\u011bt\u00edm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-2-welding-quality-factors\">4.2 Faktory kvality sva\u0159ov\u00e1n\u00ed<\/h3>\n\n\n\n<p>Mezi b\u011b\u017en\u00e9 vady svaru pat\u0159\u00ed ne\u00fapln\u00e9 prova\u0159en\u00ed, vm\u011bstky strusky, p\u00f3rovitost, pod\u0159ez\u00e1n\u00ed a jizvy po svaru. Pokud se po sva\u0159ov\u00e1n\u00ed neprovede nedestruktivn\u00ed testov\u00e1n\u00ed, jako je ultrazvukov\u00e9 testov\u00e1n\u00ed nebo radiografick\u00e9 testov\u00e1n\u00ed, mohou skryt\u00e9 vady v konstrukci z\u016fstat po dlouhou dobu.<\/p>\n\n\n\n<p>Neoptimalizovan\u00e9 parametry sva\u0159ov\u00e1n\u00ed a nedostate\u010dn\u00e9 odleh\u010den\u00ed pnut\u00ed po sva\u0159ov\u00e1n\u00ed mohou tak\u00e9 zv\u00fd\u0161it riziko. U velk\u00fdch bubnov\u00fdch konstrukc\u00ed m\u016f\u017ee b\u00fdt obt\u00ed\u017en\u00e9 prov\u00e9st tepeln\u00e9 zpracov\u00e1n\u00ed pro odleh\u010den\u00ed pnut\u00ed. Tak\u00e9 m\u016f\u017ee b\u00fdt obt\u00ed\u017en\u00e9 pln\u011b aplikovat odleh\u010den\u00ed vibra\u010dn\u00edho pnut\u00ed a p\u0159irozen\u00e9 st\u00e1rnut\u00ed nebo jin\u00e9 o\u0161et\u0159en\u00ed st\u00e1rnut\u00edm m\u016f\u017ee b\u00fdt ovlivn\u011bno po\u017eadavky harmonogramu projektu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-3-operating-loads-beyond-design-conditions\">4.3 Provozn\u00ed zat\u00ed\u017een\u00ed nad r\u00e1mec n\u00e1vrhov\u00fdch podm\u00ednek<\/h3>\n\n\n\n<p>Dlouhodob\u00e9 p\u0159et\u00ed\u017een\u00ed nad r\u00e1mec jmenovit\u00e9ho zat\u00ed\u017een\u00ed m\u016f\u017ee zv\u00fd\u0161it riziko \u00fanavy konstrukce. \u010cast\u00e9 rozj\u00ed\u017ed\u011bn\u00ed a brzd\u011bn\u00ed b\u011bhem zved\u00e1n\u00ed m\u016f\u017ee vytv\u00e1\u0159et velk\u00e1 r\u00e1zov\u00e1 zat\u00ed\u017een\u00ed. Pokud je ocelov\u00e9 lano nespr\u00e1vn\u011b uspo\u0159\u00e1d\u00e1no na bubnu, rozlo\u017een\u00ed s\u00edly na bubnu se stane nerovnom\u011brn\u00fdm a lok\u00e1ln\u00ed nap\u011bt\u00ed m\u016f\u017ee b\u00fdt mnohem vy\u0161\u0161\u00ed ne\u017e n\u00e1vrhov\u00e1 hodnota.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-4-manufacturing-and-assembly-errors\">4.4 Chyby p\u0159i v\u00fdrob\u011b a mont\u00e1\u017ei<\/h3>\n\n\n\n<p>Pokud je ulo\u017een\u00ed mezi vnit\u0159n\u00edm otvorem stojiny a h\u0159\u00eddel\u00ed p\u0159\u00edli\u0161 t\u011bsn\u00e9 nebo p\u0159\u00edli\u0161 voln\u00e9, m\u016f\u017ee se po\u010d\u00e1te\u010dn\u00ed lok\u00e1ln\u00ed nap\u011bt\u00ed st\u00e1t nerovnom\u011brn\u00fdm. Nap\u011bt\u00ed p\u0159i mont\u00e1\u017ei, kter\u00e9 nebylo zcela uvoln\u011bno, se m\u016f\u017ee pozd\u011bji kombinovat s provozn\u00edm nap\u011bt\u00edm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-5-corrosion-and-environmental-factors\">4.5 Koroze a faktory prost\u0159ed\u00ed<\/h3>\n\n\n\n<p>Pokud je buben dlouhodob\u011b vystaven vlhk\u00e9mu nebo korozivn\u00edmu prost\u0159ed\u00ed, je oblast svaru n\u00e1chyln\u011bj\u0161\u00ed ke korozi. Zkorodovan\u00e9 oblasti jsou tak\u00e9 b\u011b\u017en\u00fdmi m\u00edsty pro vznik mikrotrhlin. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"5-inspection-repair-and-prevention-measures\">5. Inspekce, opravy a preventivn\u00ed opat\u0159en\u00ed<\/h2>\n\n\n\n<p>U st\u00e1vaj\u00edc\u00edho za\u0159\u00edzen\u00ed lze pravideln\u011b prov\u00e1d\u011bt magnetopra\u0161n\u00e9 nebo ultrazvukov\u00e9 testov\u00e1n\u00ed kolem svaru mezi stojinou a h\u0159\u00eddel\u00ed bubnu. Pokud se zjist\u00ed trhliny, je t\u0159eba stojinu v\u010das opravit sva\u0159en\u00edm nebo vym\u011bnit a zkontrolovat uspo\u0159\u00e1d\u00e1n\u00ed ocelov\u00e9ho lana, aby se zabr\u00e1nilo excentrick\u00e9mu zat\u00ed\u017een\u00ed.<\/p>\n\n\n\n<p>P\u0159i n\u00e1vrhu nebo v\u00fdrob\u011b nov\u00e9ho je\u0159\u00e1bov\u00e9ho bubnu by m\u011bl b\u00fdt optimalizov\u00e1n p\u0159echodov\u00fd polom\u011br a poloha svaru by m\u011bla b\u00fdt uspo\u0159\u00e1d\u00e1na tak, aby se co nejv\u00edce zabr\u00e1nilo oblasti maxim\u00e1ln\u00edho nap\u011bt\u00ed. Postup sva\u0159ov\u00e1n\u00ed by m\u011bl b\u00fdt p\u0159\u00edsn\u011b kontrolov\u00e1n. Pro sn\u00ed\u017een\u00ed zbytkov\u00e9ho nap\u011bt\u00ed lze pou\u017e\u00edt v\u00edcevrstv\u00e9 a symetrick\u00e9 sva\u0159ov\u00e1n\u00ed a v z\u00e1vislosti na skute\u010dn\u00fdch podm\u00ednk\u00e1ch lze pou\u017e\u00edt vibra\u010dn\u00ed st\u00e1rnut\u00ed nebo p\u0159irozen\u00e9 st\u00e1rnut\u00ed.<\/p>\n\n\n\n<p>Pro \u0159\u00edzen\u00ed provozu je t\u0159eba se vyvarovat dlouhodob\u00e9ho p\u0159et\u00ed\u017een\u00ed a \u010dast\u00e9ho spou\u0161t\u011bn\u00ed a brzd\u011bn\u00ed. Uspo\u0159\u00e1d\u00e1n\u00ed ocelov\u00fdch lan by m\u011blo spl\u0148ovat platn\u00e9 po\u017eadavky a opot\u0159ebovan\u00e1 ocelov\u00e1 lana by m\u011bla b\u00fdt pravideln\u011b vym\u011b\u0148ov\u00e1na.<\/p>\n\n\n\n<p>Prask\u00e1n\u00ed svar\u016f je\u0159\u00e1bov\u00e9ho bubnu obvykle nen\u00ed zp\u016fsobeno jedin\u00fdm faktorem. Postupn\u00e1 kontrola konstrukce, sva\u0159ov\u00e1n\u00ed, zat\u00ed\u017een\u00ed, mont\u00e1\u017ee a prost\u0159ed\u00ed pom\u00e1h\u00e1 objasnit zdroj trhliny a zvolit n\u00e1pravn\u00e1 opat\u0159en\u00ed, kter\u00e1 odpov\u00eddaj\u00ed skute\u010dn\u00fdm podm\u00ednk\u00e1m na m\u00edst\u011b.<\/p>","protected":false},"excerpt":{"rendered":"Tato anal\u00fdza trhlin ve svarov\u00e9m spoji bubnu je\u0159\u00e1bu zkoum\u00e1 p\u0159\u00edpad, kdy u dlouhodob\u011b provozovan\u00e9ho je\u0159\u00e1bu do\u0161lo ke vzniku trhlin ve svarov\u00e9m spoji mezi stojinou bubnu a h\u0159\u00eddel\u00ed bubnu. A\u010dkoli se viditeln\u00e9 po\u0161kozen\u00ed jev\u00ed jako lok\u00e1ln\u00ed probl\u00e9m s \u00fanavou kovu, z\u00e1kladn\u00ed p\u0159\u00ed\u010diny mohou zahrnovat konstruk\u010dn\u00ed n\u00e1vrh, postup sva\u0159ov\u00e1n\u00ed, stav materi\u00e1lu, p\u0159enos nap\u011bt\u00ed, v\u00fdrobu a mont\u00e1\u017e [\u2026]","protected":false},"featured_media":16020,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[197],"posts_tag":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts\/16017"}],"collection":[{"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":10,"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts\/16017\/revisions"}],"predecessor-version":[{"id":16033,"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/xmxposts\/16017\/revisions\/16033"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/media\/16020"}],"wp:attachment":[{"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/media?parent=16017"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/posts_category?post=16017"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.hndfcrane.com\/cs\/wp-json\/wp\/v2\/posts_tag?post=16017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}