{"id":6785,"date":"2014-03-20T10:00:24","date_gmt":"2014-03-20T08:00:24","guid":{"rendered":"http:\/\/mixmotor.eu\/?p=6785"},"modified":"2014-03-20T10:02:19","modified_gmt":"2014-03-20T08:02:19","slug":"vylepsenie-gulockovej-skrutky","status":"publish","type":"post","link":"https:\/\/mixmotor.eu\/de\/6785\/vylepsenie-gulockovej-skrutky","title":{"rendered":"Vylep\u0161enie gu\u013e\u00f4\u010dkovej skrutky"},"content":{"rendered":"<p>S gu\u013e\u00f4\u010dkov\u00fdmi skrutkami sa m\u00f4\u017eete stretn\u00fa\u0165 v obr\u00e1bac\u00edch stroj\u00e1rskych zariadeniach, ale aj v automobiloch a to konkr\u00e9tne na riaden\u00ed automobilu. Toto kon\u0161truk\u010dn\u00e9 vyhotovenie nie je konven\u010dn\u00e9 pr\u00e1ve preto, \u017ee je ak\u00fdmsi vy\u0161\u0161\u00edm stup\u0148om be\u017en\u00e9ho ovl\u00e1dania nato\u010denia predn\u00fdch kolies automobilu cez ozuben\u00fd veniec. Tento \u010dl\u00e1nok m\u00e1 prinies\u0165 n\u00e1h\u013ead do kon\u0161truovania tak\u00e9hoto mechanizmu a pom\u00f4c\u0165 tak pochopi\u0165 zlo\u017eitos\u0165 tak jednoduch\u00e9ho syst\u00e9mu.<\/p>\n<p>Podobn\u00fdm skrutk\u00e1m (v\u010faka ktor\u00fdm m\u00f4\u017eete to\u010di\u0165 do z\u00e1krut na aute)\u00a0sa venuje aj firme UMBRAGROUP. T\u00e1 sa venuje okrem in\u00e9ho aj v\u00fdrobe lo\u017e\u00edsk a elektrick\u00fdch \u010dlenov. Dve pobo\u010dky tejto firmy p\u00f4sobia v Nemecku: prv\u00e1 vyr\u00e1ba gu\u013e\u00f4\u010dkov\u00e9 skrutky pre hutn\u00edcky priemysel\u00a0a druh\u00e1 vyr\u00e1ba gu\u013e\u00f4\u010dky. \u010eal\u0161ia pobo\u010dka tejto spolo\u010dnosti p\u00f4sob\u00ed na americkom trhu vo Washingtone a produkuje produkty pre leteck\u00fd priemysel.<\/p>\n<p>Vo v\u00fdvojovom centre Umbra Cuscinetti sa navrhuj\u00fa a prepo\u010d\u00edtavaj\u00fa aj gu\u013e\u00f4\u010dkov\u00e9 skrutky pomocou programov ANSYS a Workbench. Namodelova\u0165 skrutku spojen\u00fa s gu\u013e\u00f4\u010dkami v \u010do najvernej\u0161ej podobe sa vykon\u00e1va pru\u017einov\u00fdmi elementami vhodnej tuhosti v mieste gu\u013e\u00f4\u010dok. Pru\u017einov\u00e9 elementy (kontakt52 alebo kombin\u00e1cia 14 z\u00e1vis\u00ed na type anal\u00fdzy) s\u00fa umiestnen\u00e9 medzi dr\u00e1hou gu\u013e\u00f4\u010dok na skrutke a medzi dr\u00e1hou\u00a0gu\u013e\u00f4\u010dok na matici. Tuhostn\u00e1 hodnota pru\u017einy je vypo\u010d\u00edtavan\u00e1 Hertzianovov te\u00f3riou.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6789\" alt=\"Bez n\u00e1zvu2\" src=\"http:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu2.png\" width=\"678\" height=\"518\" srcset=\"https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu2.png 678w, https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu2-300x229.png 300w\" sizes=\"auto, (max-width: 678px) 100vw, 678px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6790\" alt=\"Bez n\u00e1zvu3\" src=\"http:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu3.png\" width=\"632\" height=\"540\" srcset=\"https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu3.png 632w, https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu3-300x256.png 300w\" sizes=\"auto, (max-width: 632px) 100vw, 632px\" \/><\/p>\n<p>V minulosti bol ka\u017ed\u00fd pru\u017einov\u00fd \u00a0element volen\u00fd samostatne spolu s jeho uzlami. Dnes je u\u017e tento probl\u00e9m odstr\u00e1nen\u00fd jedn\u00fdm kliknut\u00edm v\u010faka EnginSoft, automatick\u00e9mu modulu.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6791\" alt=\"Bez n\u00e1zvu4\" src=\"http:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu4.png\" width=\"732\" height=\"563\" srcset=\"https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu4.png 732w, https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu4-300x230.png 300w\" sizes=\"auto, (max-width: 732px) 100vw, 732px\" \/><\/p>\n<p>Prv\u00fd pr\u00edpad zn\u00e1zor\u0148uje \u0161truktur\u00e1lnu anal\u00fdzu vykon\u00e1van\u00fa pre optimaliz\u00e1ciu (ak\u00e9si ide\u00e1lne vylep\u0161enie vo v\u0161etk\u00fdch smeroch: v\u00fdrobnom, kon\u0161truk\u010dnom, ekonomickom, at\u010f.) rozdelenia za\u0165a\u017een\u00ed na komplexn\u00fd mechanizmus skrutky od elektromechanick\u00e9ho hnacieho zariadenia (v tomto pr\u00edpade pre reza\u010dku vodn\u00fdm l\u00fa\u010dom). Anal\u00fdza met\u00f3dou kone\u010dn\u00fdch prvkov pomohla vytvori\u0165 rovnomern\u00e9 za\u0165a\u017eenia na gu\u013e\u00f4\u010dok gu\u013e\u00f4\u010dkovej skrutky z p\u00f4vodn\u00e9ho nerovnomern\u00e9ho a neoptimalizovan\u00e9ho radi\u00e1lneho\u00a0\u00a0za\u0165a\u017eenia cirkuluj\u00faceho syst\u00e9mu. Zadanie za\u0165a\u017een\u00ed bolo vykonan\u00e9 ako norm\u00e1lov\u00e9 sily na pru\u017einov\u00e9 elementy.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6792\" alt=\"Bez n\u00e1zvu5\" src=\"http:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu5.png\" width=\"940\" height=\"397\" srcset=\"https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu5.png 940w, https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu5-300x126.png 300w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-6793\" style=\"width: 949px; height: 421px;\" alt=\"Bez n\u00e1zvu6\" src=\"http:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu6.png\" width=\"916\" height=\"402\" srcset=\"https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu6.png 916w, https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu6-300x131.png 300w\" sizes=\"auto, (max-width: 916px) 100vw, 916px\" \/><\/p>\n<p>Druh\u00fd pr\u00edpad sa zameriava na porovnanie podmienok mod\u00e1lnej reakcie vypo\u010d\u00edtavanej kone\u010dn\u00fdmi prvkami. Prv\u00e1 podmienka sa uva\u017euje\u00a0na pru\u017einov\u00fdch elementoch v miestach gu\u013e\u00f4\u010dok; druh\u00e1 sa uva\u017euje ako pevn\u00fd kontakt medzi dr\u00e1hami gu\u013e\u00f4\u010dok v matici a na skrutke.<\/p>\n<p><strong>Modelov\u00e1 anal\u00fdza<\/strong><\/p>\n<p>Pod\u013ea podmienok tvarov pri prvom a druhom tvare vlastn\u00fdch frekvencii (prirodzen\u00e9 kmitanie s\u00fa\u010diastky sp\u00f4sobuj\u00face pre oko nebadate\u013en\u00fa zmenu tvaru s\u00fa\u010diastky) je vidie\u0165 rozdiel v pou\u017eit\u00ed pevn\u00e9ho kontaktu a pru\u017einov\u00fdch elementov.<\/p>\n<p><strong>Anal\u00fdza PSD<\/strong><\/p>\n<p>Tzv. anal\u00fdza PSD (power spectral density) predstavuje spektr\u00e1lnu anal\u00fdzu\u00a0a ukazuje, \u017ee axi\u00e1lne nap\u00e4tie sigma-x je ve\u013emi podobn\u00e1 ekvivalentn\u00e9mu nap\u00e4tiu sigma-eq. V pr\u00edpade pevn\u00e9ho modelu je mo\u017en\u00e9 opisova\u0165 vznik sigma-eq na tomto &#8220;nere\u00e1lnom&#8221; ohybe hriade\u013ea v pr\u00edpade prvej tvarovej zmeny pri vlastnej frekvencii.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6794\" alt=\"Bez n\u00e1zvu7\" src=\"http:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu7.png\" width=\"778\" height=\"565\" srcset=\"https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu7.png 778w, https:\/\/mixmotor.eu\/wp-content\/uploads\/2014\/03\/Bez-n\u00e1zvu7-300x217.png 300w\" sizes=\"auto, (max-width: 778px) 100vw, 778px\" \/><\/p>\n<p><strong>V\u00fdsledok?<\/strong><\/p>\n<p>Okrem toho, \u017ee tento \u010dl\u00e1nok je n\u00e1pomocn\u00fd\/informa\u010dn\u00fd pre bud\u00facich a mo\u017eno za\u010d\u00ednaj\u00facich stroj\u00e1rov mo\u017eno hovori\u0165 aj o porovn\u00e1van\u00ed dvoch rozli\u010dn\u00fdch pr\u00edstupoch ku simul\u00e1cii gu\u013e\u00f4\u010dkovej skrutky. V\u00fdpo\u010det pomocou pru\u017einov\u00fdch elementov je bli\u017e\u0161\u00ed re\u00e1lnemu model.<\/p>\n<p>Autor: Vladislav Baniari; Zdroj: EnginSoft<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S gu\u013e\u00f4\u010dkov\u00fdmi skrutkami sa m\u00f4\u017eete stretn\u00fa\u0165 v obr\u00e1bac\u00edch stroj\u00e1rskych zariadeniach, ale aj v automobiloch a to konkr\u00e9tne na riaden\u00ed automobilu. Toto kon\u0161truk\u010dn\u00e9 vyhotovenie nie je konven\u010dn\u00e9 pr\u00e1ve preto, \u017ee je ak\u00fdmsi vy\u0161\u0161\u00edm stup\u0148om be\u017en\u00e9ho ovl\u00e1dania nato\u010denia predn\u00fdch kolies automobilu cez ozuben\u00fd veniec. Tento \u010dl\u00e1nok m\u00e1 prinies\u0165 n\u00e1h\u013ead do kon\u0161truovania tak\u00e9hoto mechanizmu a pom\u00f4c\u0165 tak pochopi\u0165 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6788,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[4,1],"tags":[631,630,632,633],"class_list":["post-6785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dokumentarne","category-nezaradene","tag-fea","tag-fem","tag-mkp","tag-skrutka"],"translation":{"provider":"WPGlobus","version":"3.0.0","language":"de","enabled_languages":["sk","en","de"],"languages":{"sk":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":false,"excerpt":false},"de":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/posts\/6785","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/comments?post=6785"}],"version-history":[{"count":4,"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/posts\/6785\/revisions"}],"predecessor-version":[{"id":6796,"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/posts\/6785\/revisions\/6796"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/media\/6788"}],"wp:attachment":[{"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/media?parent=6785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/categories?post=6785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mixmotor.eu\/de\/wp-json\/wp\/v2\/tags?post=6785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}