{"id":1350,"date":"2026-06-25T06:22:15","date_gmt":"2026-06-25T06:22:15","guid":{"rendered":"https:\/\/worm-and-worm-wheel.com\/?p=1350"},"modified":"2026-06-25T06:22:15","modified_gmt":"2026-06-25T06:22:15","slug":"worm-and-worm-wheel-for-bucket-elevator-drives-vertical-lift-guide","status":"publish","type":"post","link":"https:\/\/worm-and-worm-wheel.com\/cs\/worm-and-worm-wheel-for-bucket-elevator-drives-vertical-lift-guide\/","title":{"rendered":"\u0160nek a \u0161nekov\u00e9 kolo pro pohony kore\u010dkov\u00fdch elev\u00e1tor\u016f \u2014 Pr\u016fvodce vertik\u00e1ln\u00edm zdvihem"},"content":{"rendered":"
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Korea Ever-Power \u00b7 Pr\u016fvodce aplika\u010dn\u00edm in\u017een\u00fdrstv\u00edm<\/p>\n

\u0160nek a \u0161nekov\u00e9 kolo pro pohony kore\u010dkov\u00fdch elev\u00e1tor\u016f \u2014 Pr\u016fvodce vertik\u00e1ln\u00edm zdvihem<\/h1>\n

Kore\u010dkov\u00fd elev\u00e1tor se 40 pln\u00fdmi kope\u010dky zav\u011b\u0161en\u00fdmi na 25metrov\u00e9m \u0159et\u011bzu ukl\u00e1d\u00e1 dostatek gravita\u010dn\u00ed energie k tomu, aby v p\u0159\u00edpad\u011b selh\u00e1n\u00ed pohonu zrychlil zp\u011bt na destruktivn\u00ed rychlost za m\u00e9n\u011b ne\u017e 3 sekundy. \u0160nekov\u00e9 p\u0159evodovka je sou\u010d\u00e1st\u00ed stoj\u00edc\u00ed mezi \u0159\u00edzen\u00fdm zdvihem a katastrofick\u00fdm zp\u011btn\u00fdm chodem. Pochopen\u00ed jej\u00edho zat\u011b\u017eovac\u00edho cyklu nen\u00ed voliteln\u00e9 \u2013 je z\u00e1kladem pro dimenzov\u00e1n\u00ed.<\/p>\n

Promluvte si s technikem pohonu v\u00fdtahu \u2192<\/a><\/p>\n<\/div>\n

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Rychl\u00e1 odpov\u011b\u010f<\/div>\n

Kore\u010dkov\u00e9 elev\u00e1tory vy\u017eaduj\u00ed \u0161nekov\u00e9 p\u0159evody s jedn\u00edm chodem a siln\u00fdm samosvorem (\u00fahel stoup\u00e1n\u00ed 2 a\u017e 5 stup\u0148\u016f), proto\u017ee p\u0159i ka\u017ed\u00e9m zastaven\u00ed v provozu p\u016fsob\u00ed pln\u00e9 zav\u011b\u0161en\u00e9 b\u0159emeno gravitac\u00ed na hnac\u00ed h\u0159\u00eddel. Cyklus kroutic\u00edho momentu m\u00e1 \u010dty\u0159i odli\u0161n\u00e9 f\u00e1ze \u2013 plnic\u00ed n\u00e1por, st\u00e1l\u00fd vertik\u00e1ln\u00ed zdvih, n\u00e1raz do hlavy a n\u00e1vrat do stavu lehk\u00e9ho zat\u00ed\u017een\u00ed \u2013 a \u0161nekov\u00fd p\u0159evod mus\u00ed p\u0159e\u017e\u00edt vrchol ka\u017ed\u00e9 f\u00e1ze, nejen pr\u016fm\u011br. Spou\u0161t\u011bc\u00ed kroutic\u00ed moment s pln\u011b zat\u00ed\u017een\u00fdm \u0159et\u011bzem nebo \u0159emenem dosahuje 2,0 a\u017e 3,0 n\u00e1sobku ust\u00e1len\u00e9ho zvedac\u00edho momentu v d\u016fsledku statick\u00e9ho t\u0159en\u00ed a zhutn\u011bn\u00ed materi\u00e1lu. Nap\u011bt\u00ed \u0159et\u011bzu nebo \u0159emenu tak\u00e9 vytv\u00e1\u0159\u00ed zna\u010dn\u00e9 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed v\u00fdstupn\u00edho h\u0159\u00eddele \u2013 obvykle 1,5 a\u017e 3 n\u00e1sobek tangenci\u00e1ln\u00ed hnac\u00ed s\u00edly \u2013 kter\u00e9 je nutn\u00e9 porovnat s radi\u00e1ln\u00edm zat\u00ed\u017een\u00edm \u0161nekov\u00e9ho p\u0159evodu. Materi\u00e1lov\u00e9 prost\u0159ed\u00ed (zrnit\u00fd prach, chemick\u00fd pr\u00e1\u0161ek, cementov\u00fd sl\u00ednek) ur\u010duje materi\u00e1lov\u00e9 p\u00e1rov\u00e1n\u00ed, typ t\u011bsn\u011bn\u00ed a v aplikac\u00edch s obil\u00edm m\u016f\u017ee b\u00fdt vy\u017eadov\u00e1no kryt\u00ed s certifikac\u00ed ATEX.<\/p>\n<\/div>\n

<\/p>\n

Pro\u010d kore\u010dkov\u00e9 elev\u00e1tory vy\u017eaduj\u00ed samosvorn\u00e9 \u0161nekov\u00e9 p\u0159evody<\/h2>\n

\"Princip<\/p>\n

Kore\u010dkov\u00fd elev\u00e1tor je vertik\u00e1ln\u00ed dopravn\u00edk, kter\u00fd zved\u00e1 sypk\u00fd materi\u00e1l v samostatn\u00fdch kore\u010dc\u00edch p\u0159ipevn\u011bn\u00fdch k nep\u0159etr\u017eit\u00e9mu \u0159et\u011bzu nebo p\u00e1su. Na rozd\u00edl od p\u00e1sov\u00e9ho dopravn\u00edku, kde se \u00fahel sklonu m\u011bn\u00ed od 0 do 45 stup\u0148\u016f, kore\u010dkov\u00fd elev\u00e1tor pracuje na 90 stupn\u00edch nebo v jeho bl\u00edzkosti \u2013 tedy v prav\u00e9m vertik\u00e1ln\u00edm zdvihu. Gravita\u010dn\u00ed potenci\u00e1ln\u00ed energie ulo\u017een\u00e1 ve stoupaj\u00edc\u00edm \u0159et\u011bzci s n\u00e1kladem je v\u017edy dostate\u010dn\u011b velk\u00e1, aby v p\u0159\u00edpad\u011b uvoln\u011bn\u00ed vstupn\u00edho pohonu pohnala syst\u00e9m zp\u011bt.<\/p>\n

Uva\u017eujme typick\u00fd kore\u010dkov\u00fd elev\u00e1tor na obil\u00ed st\u0159edn\u00ed velikosti: 40 kore\u010dk\u016f s nosnost\u00ed 12 kg, nalo\u017een\u00fdch zhruba na 80 procent (9,6 kg na kore\u010dku), ve v\u00fd\u0161ce zdvihu 25 metr\u016f. Celkov\u00e1 zav\u011b\u0161en\u00e1 hmotnost na stoupaj\u00edc\u00ed stran\u011b je 40 \u00d7 9,6 = 384 kg. Sestupn\u00e1 pr\u00e1zdn\u00e1 strana v\u00e1\u017e\u00ed zhruba 40 \u00d7 2,5 kg (hmotnost kore\u010dky) = 100 kg. \u010cist\u00e1 gravita\u010dn\u00ed nevyv\u00e1\u017eenost: 284 kg p\u016fsob\u00edc\u00edch sm\u011brem dol\u016f na stoupaj\u00edc\u00ed stran\u011b. P\u0159i polom\u011bru \u0159et\u011bzov\u00e9ho kola 200 mm je gravita\u010dn\u00ed moment 284 \u00d7 9,81 \u00d7 0,20 = 557 N\u00b7m \u2013 trvale p\u016fsob\u00edc\u00ed na v\u00fdstupn\u00ed h\u0159\u00eddel, kdykoli je elev\u00e1tor nalo\u017een a stoj\u00ed.<\/p>\n

\u0160nekov\u00e9 soukol\u00ed mus\u00ed odolat tomuto kroutic\u00edmu momentu, ani\u017e by prokluzovalo dozadu. V\u00edcechodov\u00e9 soukol\u00ed s \u00fahlem stoup\u00e1n\u00ed nad \u00fahlem t\u0159en\u00ed neudr\u017e\u00ed \u2013 kore\u010dky zrychluj\u00ed dozadu, \u0159et\u011bz se \u0161leh\u00e1, materi\u00e1l se vysype do spodn\u00ed \u010d\u00e1sti a b\u011bhem n\u011bkolika sekund dojde k mechanick\u00e9mu po\u0161kozen\u00ed \u0159et\u011bzu, ozuben\u00fdch kol a kore\u010dk\u016f. Jednochodov\u00e9 \u0161nekov\u00e9 soukol\u00ed s \u00fahlem stoup\u00e1n\u00ed pod 5 stup\u0148\u016f jsou standardem pro v\u0161echny pohony kore\u010dkov\u00fdch elev\u00e1tor\u016f. Sn\u00ed\u017een\u00ed \u00fa\u010dinnosti (obvykle 40 a\u017e 55 procent) p\u0159edstavuje akceptovan\u00e9 n\u00e1klady na zaru\u010den\u00e9 udr\u017een\u00ed v d\u016fsledku gravitace.<\/p>\n

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\u010cty\u0159f\u00e1zov\u00fd cyklus kroutic\u00edho momentu kore\u010dkov\u00e9ho elev\u00e1toru<\/h2>\n
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Na rozd\u00edl od p\u00e1sov\u00e9ho dopravn\u00edku, kter\u00fd b\u011b\u017e\u00ed s p\u0159ibli\u017en\u011b konstantn\u00edm to\u010div\u00fdm momentem, kore\u010dkov\u00fd elev\u00e1tor vnucuje \u0161nekov\u00e9mu soukol\u00ed cyklick\u00fd vzorec to\u010div\u00e9ho momentu. \u010cty\u0159i f\u00e1ze se opakuj\u00ed s ka\u017edou kore\u010dkou proch\u00e1zej\u00edc\u00ed plnic\u00edm bodem a v\u00fdtla\u010dnou hlavou. Vrchol to\u010div\u00e9ho momentu nast\u00e1v\u00e1 b\u011bhem f\u00e1ze 1 (plnic\u00ed n\u00e1por) a f\u00e1ze 3 (n\u00e1raz p\u0159i v\u00fdtla\u010dn\u00e9m n\u00e1poru) \u2013 a \u0161nekov\u00e9 soukol\u00ed mus\u00ed b\u00fdt dimenzov\u00e1no na tyto \u0161pi\u010dky, nikoli na pr\u016fm\u011br f\u00e1ze 2.<\/p>\n

N\u00ed\u017ee uveden\u00fd diagram cyklu zobrazuje ka\u017edou f\u00e1zi podle jej\u00ed charakteristiky kroutic\u00edho momentu a konstruk\u010dn\u00edho parametru \u0161nekov\u00e9ho p\u0159evodu, kter\u00fd nejv\u00edce zat\u011b\u017euje.<\/p>\n<\/div>\n

\"Detail<\/div>\n<\/div>\n

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01<\/div>\n
F\u00e1ze 1 \u2013 N\u00e1r\u016fst n\u00e1pln\u011b<\/div>\n

Ka\u017ed\u00e1 lopata nab\u00edr\u00e1 materi\u00e1l z n\u00e1sypky. N\u00e1hl\u00e9 p\u0159id\u00e1n\u00ed hmoty vytv\u00e1\u0159\u00ed p\u0159i p\u0159echodu lopaty z pr\u00e1zdn\u00e9ho do nalo\u017een\u00e9ho stavu, p\u0159i\u010dem\u017e se st\u00e1le zrychluje sm\u011brem nahoru, prudk\u00fd n\u00e1r\u016fst to\u010div\u00e9ho momentu o 1,3 a\u017e 1,8n\u00e1sobek ust\u00e1len\u00e9ho stavu.<\/p>\n

Nap\u011bt\u00ed: oh\u00fdb\u00e1n\u00ed ko\u0159ene zubu, kontaktn\u00ed \u00fanava<\/div>\n<\/div>\n
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02<\/div>\n
F\u00e1ze 2 \u2013 Stabiln\u00ed vertik\u00e1ln\u00ed zdvih<\/div>\n

Nalo\u017een\u00e9 lopaty se pohybuj\u00ed svisle konstantn\u00ed rychlost\u00ed. To\u010div\u00fd moment je stabiln\u00ed a p\u0159edv\u00eddateln\u00fd \u2013 z\u00e1kladn\u00ed hodnota pro tepeln\u00e9 dimenzov\u00e1n\u00ed. Tato f\u00e1ze p\u0159edstavuje 60 a\u017e 70 procent celkov\u00e9 doby cyklu.<\/p>\n

Nap\u011bt\u00ed: tepeln\u00e9 zat\u00ed\u017een\u00ed, opot\u0159eben\u00ed (kontinu\u00e1ln\u00ed kluzn\u00e9 zat\u00ed\u017een\u00ed)<\/div>\n<\/div>\n
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03<\/div>\n
F\u00e1ze 3 \u2013 Dopad vypou\u0161t\u011bn\u00ed<\/div>\n

Na hlavov\u00e9m \u0159et\u011bzov\u00e9m kole se lopata p\u0159evrac\u00ed a materi\u00e1l se vysyp\u00e1v\u00e1 odst\u0159edivou silou a gravitac\u00ed. N\u00e1hl\u00e1 ztr\u00e1ta hmotnosti vytv\u00e1\u0159\u00ed p\u0159echodn\u00e9 sn\u00ed\u017een\u00ed to\u010div\u00e9ho momentu, po kter\u00e9m n\u00e1sleduje p\u0159erozd\u011blen\u00ed nap\u011bt\u00ed \u0159et\u011bzu \u2013 kr\u00e1tkodob\u00fd n\u00e1r\u016fst to\u010div\u00e9ho momentu o 1,2 a\u017e 1,5n\u00e1sobek ust\u00e1len\u00e9ho stavu.<\/p>\n

Nap\u011bt\u00ed: dynamick\u00e9 obr\u00e1cen\u00ed zat\u00ed\u017een\u00ed, r\u00e1zov\u00e9 nap\u011bt\u00ed \u0159et\u011bzu<\/div>\n<\/div>\n
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04<\/div>\n
F\u00e1ze 4 \u2013 N\u00e1vrat pr\u00e1zdn\u00e9ho prostoru<\/div>\n

Pr\u00e1zdn\u00e9 ko\u0161\u00edky sestupuj\u00ed po vratn\u00e9m \u0159et\u011bzci. Po\u017eadavek na to\u010div\u00fd moment kles\u00e1 zhruba na 30 a\u017e 40 procent ust\u00e1len\u00e9ho stavu, proto\u017ee gravitace pom\u00e1h\u00e1 sestupuj\u00edc\u00edm pr\u00e1zdn\u00fdm ko\u0161el\u016fm. Tato f\u00e1ze zaji\u0161\u0165uje \u010d\u00e1ste\u010dn\u00e9 tepeln\u00e9 zotaven\u00ed.<\/p>\n

Stres: minim\u00e1ln\u00ed (f\u00e1ze zotaven\u00ed)<\/div>\n<\/div>\n<\/div>\n

D\u016fsledky pro design:<\/strong> Jmenovit\u00fd to\u010div\u00fd moment dvojice \u0161nekov\u00fdch kol mus\u00ed p\u0159ekro\u010dit \u0161pi\u010dkov\u00fd plnic\u00ed r\u00e1z ve f\u00e1zi 1 (1,3 a\u017e 1,8n\u00e1sobek ust\u00e1len\u00e9ho stavu), nikoli pr\u016fm\u011br ve f\u00e1zi 2. Pou\u017eit\u00ed pouze ust\u00e1len\u00e9ho to\u010div\u00e9ho momentu ve f\u00e1zi 2 pro specifikaci \u2013 nejb\u011b\u017en\u011bj\u0161\u00ed zkratka pro dimenzov\u00e1n\u00ed \u2013 podhodnocuje dvojici o 30 a\u017e 80 procent. Po 8 000 a\u017e 15 000 hodin\u00e1ch p\u0159i tomto podhodnocen\u00ed se na bronzov\u00e9m kole na zat\u00ed\u017een\u00fdch boc\u00edch vytvo\u0159\u00ed d\u016flkov\u00e1 koroze a za\u010dne se r\u016fst v\u016fle. Dvojice nakonec sel\u017ee nikoli v d\u016fsledku jedin\u00e9ho p\u0159et\u00ed\u017een\u00ed, ale v d\u016fsledku kumulativn\u00ed \u00fanavy p\u0159i ka\u017ed\u00e9m plnic\u00edm cyklu.<\/p>\n

Situace p\u0159i spu\u0161t\u011bn\u00ed je je\u0161t\u011b hor\u0161\u00ed.<\/strong> Kore\u010dkov\u00fd elev\u00e1tor, kter\u00fd se zastav\u00ed s pln\u011b zat\u00ed\u017een\u00fdm stoupaj\u00edc\u00edm \u0159et\u011bzem a znovu se rozb\u011bhne, zaznamen\u00e1v\u00e1 spou\u0161t\u011bc\u00ed moment 2,0 a\u017e 3,0n\u00e1sobek ust\u00e1len\u00e9ho zvedac\u00edho momentu. Statick\u00e9 t\u0159en\u00ed \u0159et\u011bzu na \u0159et\u011bzov\u00e9m kole, usazen\u00ed materi\u00e1lu v kore\u010dc\u00edch b\u011bhem doby zastaven\u00ed a setrva\u010dnost zat\u00ed\u017een\u00e9ho \u0159et\u011bzu, to v\u0161e se kombinuje. \u0160nekov\u00e9 soukol\u00ed mus\u00ed p\u0159e\u017e\u00edt tuto spou\u0161t\u011bc\u00ed \u0161pi\u010dku p\u0159i ka\u017ed\u00e9m spu\u0161t\u011bn\u00ed sm\u011bny, ka\u017ed\u00e9m p\u0159eru\u0161en\u00ed nap\u00e1jen\u00ed a ka\u017ed\u00e9m obnoven\u00ed provozu po nouzov\u00e9m zastaven\u00ed. Provozn\u00ed faktor pro kore\u010dkov\u00fd elev\u00e1tor by m\u011bl b\u00fdt minim\u00e1ln\u011b 2,0 a\u017e 2,5.<\/p>\n

<\/p>\n

Nap\u011bt\u00ed \u0159et\u011bzu a radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed na v\u00fdstupn\u00ed h\u0159\u00eddeli \u0161nekov\u00e9ho p\u0159evodu<\/h2>\n

Rozm\u011br specifikace \u0161nekov\u00e9ho p\u0159evodu kore\u010dkov\u00e9ho elev\u00e1toru, se kter\u00fdm se aplikace p\u00e1sov\u00fdch dopravn\u00edk\u016f setk\u00e1vaj\u00ed jen z\u0159\u00eddka, je radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed vyv\u00edjen\u00e9 nap\u011bt\u00edm \u0159et\u011bzu nebo \u0159emene na v\u00fdstupn\u00ed h\u0159\u00eddel. V\u00fdstupn\u00ed h\u0159\u00eddel \u0161nekov\u00e9ho p\u0159evodu nese hlavn\u00ed \u0159et\u011bzov\u00e9 kolo a \u0159et\u011bzov\u00e9 kolo je ta\u017eeno dol\u016f kombinovanou hmotnost\u00ed nalo\u017een\u00fdch stoupaj\u00edc\u00edch kore\u010dk\u016f a samotn\u00e9ho \u0159et\u011bzu. Tato s\u00edla p\u016fsob\u00ed jako radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed na lo\u017eiska v\u00fdstupn\u00edho h\u0159\u00eddele.<\/p>\n

\n\n\n\n\n\n\n\n
Velikost v\u00fdtahu<\/th>\nTypick\u00e1 kapacita<\/th>\nNap\u011bt\u00ed \u0159et\u011bzu (napnut\u00e1 strana)<\/th>\nRadi\u00e1ln\u00ed zat\u00ed\u017een\u00ed na v\u00fdstupn\u00ed h\u0159\u00eddeli<\/th>\nTypick\u00e1 osov\u00e1 vzd\u00e1lenost<\/th>\n<\/tr>\n<\/thead>\n
Mal\u00fd (10\u201330 t\/h)<\/td>\nObiloviny, semena, pelety<\/td>\n3 000 \u2013 8 000 N<\/td>\n4 500 \u2013 12 000 N<\/td>\n80 \u2013 125 mm<\/td>\n<\/tr>\n
St\u0159edn\u00ed (30\u201380 t\/h)<\/td>\nChemick\u00fd pr\u00e1\u0161ek, hnojivo<\/td>\n8 000 \u2013 18 000 N<\/td>\n12 000 \u2013 27 000 N<\/td>\n125 \u2013 200 mm<\/td>\n<\/tr>\n
Velk\u00fd (80\u2013200 t\/h)<\/td>\nCementov\u00fd sl\u00ednek, kamenivo<\/td>\n18 000 \u2013 45 000 N<\/td>\n27 000 \u2013 67 500 N<\/td>\n200 \u2013 250 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed je p\u0159ibli\u017en\u011b 1,5kr\u00e1t v\u011bt\u0161\u00ed ne\u017e nap\u011bt\u00ed \u0159et\u011bzu na napnut\u00e9 stran\u011b, proto\u017ee nap\u011bt\u00ed na voln\u00e9 stran\u011b p\u0159id\u00e1v\u00e1 slo\u017eku ve stejn\u00e9m sm\u011bru. Toto radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed mus\u00ed b\u00fdt porovn\u00e1no s \u00fanosnost\u00ed v\u00fdstupn\u00edho h\u0159\u00eddele dvojice \u0161nekov\u00fdch kol. Dvojice kol dimenzovan\u00e1 na dostate\u010dn\u00fd to\u010div\u00fd moment, ale nedostate\u010dn\u00e9 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed, sel\u017ee na v\u00fdstupn\u00edch lo\u017eisk\u00e1ch sp\u00ed\u0161e ne\u017e na zubech ozuben\u00e9ho kola \u2013 tento zp\u016fsob selh\u00e1n\u00ed napodobuje vadu lo\u017eiska, ale m\u00e1 p\u016fvod v chyb\u011b specifikace.<\/p>\n

U st\u0159edn\u00edch a velk\u00fdch kore\u010dkov\u00fdch elev\u00e1tor\u016f, kde radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed p\u0159ekra\u010duje standardn\u00ed jmenovit\u00e9 zat\u00ed\u017een\u00ed v\u00fdstupn\u00edho lo\u017eiska uveden\u00e9 v katalogu, je \u0159e\u0161en\u00edm bu\u010f v\u011bt\u0161\u00ed \u0161nekov\u00fd p\u0159evodov\u00fd p\u00e1r r\u00e1mu (kter\u00fd \u00fam\u011brn\u011b zvy\u0161uje \u00fanosnost), nebo stojat\u00e9 lo\u017eisko vn\u011b sk\u0159\u00edn\u011b \u0161nekov\u00e9ho p\u0159evodu, kter\u00e9 nese radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed \u0159et\u011bzu samostatn\u011b. Druh\u00e1 mo\u017enost je b\u011b\u017en\u011bj\u0161\u00ed u velk\u00fdch kore\u010dkov\u00fdch elev\u00e1tor\u016f pro cement a t\u011b\u017ebu, kde by zat\u00ed\u017een\u00ed \u0159et\u011bzu vy\u017eadovalo nadm\u011brn\u011b dimenzovan\u00fd a neekonomick\u00fd \u0161nekov\u00fd p\u0159evodov\u00fd p\u00e1r, kter\u00fd by nesl pouze radi\u00e1ln\u00ed s\u00edlu.<\/p>\n

<\/p>\n

\n
Pozn\u00e1mka k in\u017een\u00fdrsk\u00e9mu stolu<\/div>\n

Korejsk\u00fd z\u00e1vod na v\u00fdrobu krmiv pro zv\u00ed\u0159ata uvedl do provozu 25metrov\u00fd kore\u010dkov\u00fd elev\u00e1tor s v\u00fdkonem 45 tun za hodinu. \u0160nekov\u00fd soukol\u00ed bylo specifikov\u00e1no s rozte\u010d\u00ed 100 mm, modulem 4, jednochod\u00fdm p\u0159evodem a p\u0159evodov\u00fdm pom\u011brem 50:1 \u2013 co\u017e odpov\u00edd\u00e1 vypo\u010d\u00edtan\u00e9mu ust\u00e1len\u00e9mu zvedac\u00edmu momentu 320 N\u00b7m s SF 2.0, kter\u00fd odpov\u00edd\u00e1 po\u017eadavku 640 N\u00b7m. Vybran\u00fd p\u00e1r byl dimenzov\u00e1n na 680 N\u00b7m. Elev\u00e1tor b\u011b\u017eel 11 m\u011bs\u00edc\u016f, ne\u017e selhalo v\u00fdstupn\u00ed lo\u017eisko. Anal\u00fdza poruchy neodhalila \u017e\u00e1dn\u00e9 po\u0161kozen\u00ed zub\u016f ozuben\u00e9ho kola \u2013 zuby byly ve v\u00fdborn\u00e9m stavu. Hlavn\u00ed p\u0159\u00ed\u010dinou bylo radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed \u0159et\u011bzu: nap\u011bt\u00ed \u0159et\u011bzu na t\u011bsn\u00e9 stran\u011b bylo 9 200 N, co\u017e ve st\u0159edu v\u00fdstupn\u00edho h\u0159\u00eddele produkovalo radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed p\u0159ibli\u017en\u011b 13 800 N. Vybran\u00fd 100mm p\u00e1r m\u011bl v\u00fdstupn\u00ed radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed pouze 8 500 N. Lo\u017eisko pracovalo 11 m\u011bs\u00edc\u016f na 162 procentech sv\u00e9 jmenovit\u00e9 radi\u00e1ln\u00ed \u00fanosnosti. N\u00e1hradn\u00ed specifikace se zm\u011bnila na p\u00e1r s rozte\u010d\u00ed 125 mm (radi\u00e1ln\u00ed jmenovit\u00e1 s\u00edla 15 000 N) s cenovou p\u0159ir\u00e1\u017ekou 280 USD \u2013 rozhodnut\u00ed, kter\u00e9 m\u011blo b\u00fdt u\u010din\u011bno ji\u017e v p\u016fvodn\u00ed f\u00e1zi specifikace. Ponau\u010den\u00ed pro zad\u00e1v\u00e1n\u00ed \u0161nekov\u00fdch p\u0159evod\u016f kore\u010dkov\u00fdch elev\u00e1tor\u016f: v\u017edy ov\u011b\u0159ujte radi\u00e1ln\u00ed \u00fanosnost vzhledem k nap\u011bt\u00ed \u0159et\u011bzu, nikoli pouze \u00fanosnost kroutic\u00edho momentu vzhledem k nosnosti. Tyto dv\u011b kontroly jsou nez\u00e1visl\u00e9 a kter\u00e1koli z nich m\u016f\u017ee b\u00fdt z\u00e1vazn\u00fdm omezen\u00edm.<\/p>\n<\/div>\n

<\/p>\n

Specifikace materi\u00e1lu a t\u011bsn\u011bn\u00ed podle dopravovan\u00e9ho materi\u00e1lu<\/h2>\n
\n
\"Detail<\/div>\n
\n

Kore\u010dkov\u00e9 elev\u00e1tory manipuluj\u00ed se t\u0159emi \u0161irok\u00fdmi kategoriemi sypk\u00fdch materi\u00e1l\u016f, z nich\u017e ka\u017ed\u00e1 klade na \u0161nekov\u00fd p\u0159evod jin\u00e9 environment\u00e1ln\u00ed n\u00e1roky. Dopravovan\u00fd materi\u00e1l ur\u010duje nejen po\u017eadovan\u00fd to\u010div\u00fd moment, ale tak\u00e9 metalurgii, t\u011bsn\u011bn\u00ed a v n\u011bkter\u00fdch p\u0159\u00edpadech i shodu ozuben\u00e9ho pohonu s pr\u00e1vn\u00edmi p\u0159edpisy.<\/p>\n

Spr\u00e1vn\u00e9 p\u00e1rov\u00e1n\u00ed materi\u00e1l\u016f v dob\u011b specifikace zabra\u0148uje nejdra\u017e\u0161\u00edmu typu selh\u00e1n\u00ed \u2013 korozi nebo po\u0161kozen\u00ed kontaminac\u00ed, kter\u00e9 zni\u010d\u00ed \u0161nek i kolo sou\u010dasn\u011b, co\u017e vy\u017eaduje v\u00fdm\u011bnu cel\u00e9ho p\u00e1ru, nikoli pouze kola.<\/p>\n<\/div>\n<\/div>\n

\n
\n
Obiloviny a potravin\u00e1\u0159sk\u00e9 komodity<\/div>\n

\u010cerv:<\/strong> Standardn\u00ed kalen\u00e1 ocel, ut\u011bsn\u011bn\u00e9 pouzdro.
\nKolo:<\/strong> Fosforov\u00fd bronz CuSn12Ni.
\nPe\u010de\u0165:<\/strong> Dvojit\u00e9 b\u0159itov\u00e9 t\u011bsn\u011bn\u00ed + labyrint, pozitivn\u00ed vnit\u0159n\u00ed tlak (ochrana proti prachu).
\nSpeci\u00e1ln\u00ed:<\/strong> Pokud koncentrace obiln\u00e9ho prachu p\u0159ekro\u010d\u00ed doln\u00ed mez v\u00fdbu\u0161nosti (LEL), je vy\u017eadov\u00e1na certifikace ATEX pro z\u00f3nu 21\/22. Kryt mus\u00ed b\u00fdt nejisk\u0159iv\u00fd nebo certifikovan\u00fd pro danou z\u00f3nu. Mazivo potravin\u00e1\u0159sk\u00e9 kvality (minim\u00e1ln\u011b NSF H2) pro jak\u00fdkoli v\u00fdtah pod\u00e1vaj\u00edc\u00ed potraviny do potravin\u00e1\u0159sk\u00fdch za\u0159\u00edzen\u00ed.<\/p>\n<\/div>\n

\n
Chemick\u00fd pr\u00e1\u0161ek a hnojivo<\/div>\n

\u010cerv:<\/strong> Pozinkovan\u00e1 nebo nerezov\u00e1 ocel (AISI 304 pro m\u00edrn\u00e9 chemik\u00e1lie, 316L pro chloridy\/kyseliny).
\nKolo:<\/strong> Hlin\u00edkov\u00fd bronz CuAl10Fe5Ni5 (odoln\u00fd proti korozi, bez odzinkov\u00e1n\u00ed).
\nPe\u010de\u0165:<\/strong> PTFE b\u0159itov\u00e9 t\u011bsn\u011bn\u00ed + p\u0159etlakov\u00fd labyrint (ochrana proti chemick\u00fdm v\u00fdpar\u016fm).
\nSpeci\u00e1ln\u00ed:<\/strong> Ov\u011b\u0159te kompatibilitu maziva s chemick\u00fdmi v\u00fdpary \u2013 n\u011bkter\u00e9 odpadn\u00ed plyny z hnojiv (amoniak, H\u2082S) rychle degraduj\u00ed standardn\u00ed miner\u00e1ln\u00ed olej.<\/p>\n<\/div>\n

\n
Cementov\u00fd sl\u00ednek a kamenivo<\/div>\n

\u010cerv:<\/strong> Kalen\u00e1 ocel 42CrMo4 (r\u00e1zov\u011b odoln\u00e1, HRC 28-34).
\nKolo:<\/strong> Fosforov\u00fd bronz lit\u00fd odst\u0159ediv\u011b (hust\u0161\u00ed mikrostruktura, vynikaj\u00edc\u00ed odolnost proti opot\u0159eben\u00ed).
\nPe\u010de\u0165:<\/strong> Trojit\u00fd labyrintov\u00fd + odvzdu\u0161\u0148ovac\u00ed filtr (extr\u00e9mn\u00ed prach, teplotn\u00ed cykly).
\nSpeci\u00e1ln\u00ed:<\/strong> Chlazen\u00ed nucen\u00fdm vzduchem nebo kryt s ventil\u00e1torem pro nep\u0159etr\u017eit\u00fd provoz nad 5 kW. Cementov\u00fd prach je alkalick\u00fd a hygroskopick\u00fd \u2013 pronik\u00e1n\u00ed do sk\u0159\u00edn\u011b p\u0159evodovky emulguje mazivo b\u011bhem n\u011bkolika t\u00fddn\u016f.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Specifikace p\u00e1r\u016f \u0161nekov\u00fdch p\u0159evod\u016f t\u0159\u00ed kore\u010dkov\u00fdch elev\u00e1tor\u016f<\/h2>\n

\"aplikace<\/p>\n

P\u0159\u00edpad 1 \u2013 Korejsk\u00e9 obiln\u00e9 silo: r\u00fd\u017eov\u00fd elev\u00e1tor s v\u00fdkonem 35 t\/h s po\u017eadavkem ATEX<\/h3>\n

Korejsk\u00e9 zem\u011bd\u011blsk\u00e9 dru\u017estvo specifikovalo p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f pro \u0161est 20metrov\u00fdch kore\u010dkov\u00fdch elev\u00e1tor\u016f, kter\u00e9 p\u0159ij\u00edmaj\u00ed r\u00fd\u017ei z n\u00e1kladn\u00edho auta na vrchol sila. Kapacita 35 tun za hodinu na elev\u00e1tor. Rozte\u010d lopat 350 mm, objem lopaty 8 litr\u016f, rychlost p\u00e1su 1,8 m\/s. Ust\u00e1len\u00fd zvedac\u00ed moment: 280 N\u00b7m. Faktor n\u00e1b\u011bhu p\u0159i pln\u011bn\u00ed f\u00e1ze 1: 1,5\u00d7. Faktor spou\u0161t\u011bn\u00ed se zat\u00ed\u017een\u00fdm p\u00e1sem: 2,5\u00d7. Provozn\u00ed faktor pro m\u00edrn\u00e9 r\u00e1zy: 1,5. Nejhor\u0161\u00ed kroutic\u00ed moment: 280 \u00d7 2,5 \u00d7 1,5 = 1 050 N\u00b7m. Radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed nap\u011bt\u00edm \u0159emene na v\u00fdstupn\u00ed h\u0159\u00eddeli: 7 200 N. Specifikace: p\u00e1r \u0161nekov\u00fdch p\u0159evod\u016f s jedn\u00edm chodem, modul 5, rozte\u010d 125 mm, p\u0159evodov\u00fd pom\u011br 40:1, q = 10, \u00fahel stoup\u00e1n\u00ed 5,7 stup\u0148\u016f. Jmenovit\u00fd kroutic\u00ed moment 1 200 N\u00b7m, jmenovit\u00fd v\u00fdstupn\u00ed radi\u00e1ln\u00ed v\u00fdkon 12 000 N \u2013 oboj\u00ed v r\u00e1mci tolerance. Materi\u00e1l: standardn\u00ed kalen\u00fd \u0161nek, kolo z fosforov\u00e9ho bronzu, ut\u011bsn\u011bn\u00e1 mazac\u00ed sk\u0159\u00ed\u0148. Vy\u017eadov\u00e1na certifikace ATEX Zone 22 (obiln\u00fd prach v okoln\u00ed atmosf\u00e9\u0159e, a\u010dkoli je sk\u0159\u00ed\u0148 p\u0159evodovky ut\u011bsn\u011bna). Mazivo NSF H2 je p\u0159edeps\u00e1no, proto\u017ee elev\u00e1tor z\u00e1sobuje linku na zpracov\u00e1n\u00ed r\u00fd\u017ee ur\u010denou k lidsk\u00e9 spot\u0159eb\u011b. Odhadovan\u00e1 \u017eivotnost: 6 a\u017e 8 let p\u0159i dvousm\u011bnn\u00e9m provozu (4 800 h\/rok). Cena za p\u00e1r: 520 USD. Servis v ter\u00e9nu na 6 elev\u00e1torech po dobu 4 let: \u017e\u00e1dn\u00e9 poruchy, \u017e\u00e1dn\u00e9 p\u0159\u00edpady vr\u00e1cen\u00ed stroje zp\u011bt, hluk nam\u011b\u0159en\u00fd na 68 dB(A) ve vzd\u00e1lenosti 1 metru.<\/p>\n

P\u0159\u00edpad 2 \u2013 Japonsk\u00fd chemick\u00fd z\u00e1vod: Elev\u00e1tor hnojiv o v\u00fdkonu 60 t\/h s ochranou proti korozi<\/h3>\n

Japonsk\u00fd v\u00fdrobce hnojiv specifikoval dvojice \u0161nekov\u00fdch p\u0159evod\u016f pro dva 30metrov\u00e9 kore\u010dkov\u00e9 elev\u00e1tory manipuluj\u00edc\u00ed s granulovan\u00fdm s\u00edranem amonn\u00fdm. Hlavn\u00ed v\u00fdzvu p\u0159edstavovalo chemick\u00e9 prost\u0159ed\u00ed: koncentrace par amoniaku kolem paty elev\u00e1toru byla dostate\u010dn\u00e1 k tomu, aby zp\u016fsobila korozi standardn\u00ed uhl\u00edkov\u00e9 oceli b\u011bhem 6 m\u011bs\u00edc\u016f. Ust\u00e1len\u00fd zvedac\u00ed moment: 680 N\u00b7m. Prudk\u00fd n\u00e1r\u016fst ve f\u00e1zi 1: 1,6\u00d7. Faktor spou\u0161t\u011bn\u00ed: 2,0. SF: 2,0. Nejhor\u0161\u00ed kroutic\u00ed moment: 680 \u00d7 2,0 \u00d7 2,0 = 2 720 N\u00b7m. Radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed \u0159et\u011bzu: 22 000 N. Specifikace: p\u00e1r \u0161nekov\u00fdch p\u0159evod\u016f s jedn\u00edm chodem, modul 8, rozte\u010d 200 mm, p\u0159evodov\u00fd pom\u011br 50:1. \u0160nek: nerezov\u00e1 ocel AISI 304 (odoln\u00e1 v\u016f\u010di amoniaku). Kolo: hlin\u00edkov\u00fd bronz CuAl10Fe5Ni5 (bez odzinkov\u00e1n\u00ed v amoniakov\u00e9 atmosf\u00e9\u0159e). T\u011bsn\u011bn\u00ed: b\u0159itov\u00e9 t\u011bsn\u011bn\u00ed PTFE s tlakov\u00fdm labyrintem \u2013 pozitivn\u00ed vnit\u0159n\u00ed tlak vzduchu zabra\u0148uje vnik\u00e1n\u00ed par amoniaku. Mazivo: syntetick\u00fd PAG s antikorozn\u00edm bal\u00ed\u010dkem aditiv, ov\u011b\u0159en\u00fdm jako kompatibiln\u00ed se stopami amoniaku. N\u00e1kladov\u00e1 p\u0159ir\u00e1\u017eka oproti standardn\u00ed ocelobronzov\u00e9 spojce: 1 400 USD za p\u00e1r (zhruba o 45 procent v\u00edce ne\u017e standard). P\u0159edpokl\u00e1dan\u00e1 \u017eivotnost: 5 a\u017e 7 let v prost\u0159ed\u00ed s amoniakem oproti odhadovan\u00fdm 8 a\u017e 14 m\u011bs\u00edc\u016fm u standardn\u00ed ocelobronzov\u00e9 spojky. Materi\u00e1lov\u00e1 p\u0159ir\u00e1\u017eka 1 400 USD se vr\u00e1t\u00ed b\u011bhem prvn\u00edho roku, proto\u017ee se u\u0161et\u0159\u00ed v\u00fdm\u011bna. Proch\u00e1zet \u0161nekov\u00e1 p\u0159evodovka pro v\u00fdtah<\/a> mo\u017enosti, kter\u00e9 zahrnuj\u00ed kombinace materi\u00e1l\u016f odoln\u00fdch proti korozi pro kore\u010dkov\u00e9 elev\u00e1tory odoln\u00e9 v\u016f\u010di chemik\u00e1li\u00edm a prost\u0159ed\u00ed.<\/p>\n

P\u0159\u00edpad 3 \u2013 Vietnamsk\u00e1 cement\u00e1rna: Sl\u00ednkov\u00fd elev\u00e1tor o v\u00fdkonu 120 t\/h s tepeln\u00fdm managementem<\/h3>\n

Vietnamsk\u00fd v\u00fdrobce cementu specifikoval dvojice \u0161nekov\u00fdch p\u0159evod\u016f pro 35metrov\u00fd kore\u010dkov\u00fd elev\u00e1tor, kter\u00fd zved\u00e1 hork\u00fd cementov\u00fd sl\u00ednek (teplota materi\u00e1lu 80 a\u017e 120 stup\u0148\u016f Celsia) z v\u00fdpustn\u00e9ho potrub\u00ed chladi\u010de do sila na sl\u00ednek. Tepeln\u00e1 v\u00fdzva byla dvoj\u00ed: vysok\u00e1 teplota materi\u00e1lu vyza\u0159ovala teplo do sk\u0159\u00edn\u011b elev\u00e1toru a nep\u0159etr\u017eit\u00fd provoz v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch generoval zna\u010dn\u00e9 t\u0159ec\u00ed teplo v p\u00e1ru \u0161nekov\u00fdch p\u0159evod\u016f s jednor\u00e1zovou \u00fa\u010dinnost\u00ed p\u0159ibli\u017en\u011b 42 procent. Ust\u00e1len\u00fd zvedac\u00ed moment: 1 800 N\u00b7m. Prudk\u00fd n\u00e1r\u016fst ve f\u00e1zi 1: 1,8\u00d7. Spu\u0161t\u011bn\u00ed se zhutn\u011bn\u00fdm sl\u00ednkem: 3,0\u00d7. SF: 2,5. Nejhor\u0161\u00ed kroutic\u00ed moment: 1 800 \u00d7 3,0 \u00d7 2,5 = 13 500 N\u00b7m. Po\u017eadavek 13,5 kN\u00b7m p\u0159ekro\u010dil kapacitu jednoho p\u00e1ru \u0161nek\u016f p\u0159i standardn\u00edch rozte\u010d\u00edch \u2013 specifikace byla vy\u0159e\u0161ena pou\u017eit\u00edm dvoustup\u0148ov\u00e9 redukce: prim\u00e1rn\u00ed p\u00e1r \u0161nek\u016f s rozte\u010d\u00ed 250 mm (jmenovit\u00fd moment 8 000 N\u00b7m, p\u0159evod 25:1) se sekund\u00e1rn\u00edm \u0159et\u011bzov\u00fdm reduk\u010dn\u00edm stupn\u011bm (3:1), kter\u00fd zaji\u0161\u0165oval zb\u00fdvaj\u00edc\u00ed p\u0159evodov\u00fd pom\u011br. Celkov\u00fd p\u0159evod: 75:1. P\u00e1r \u0161nek\u016f nesl efektivn\u00ed moment 4 500 N\u00b7m \u2013 co\u017e je v r\u00e1mci jmenovit\u00e9ho momentu 8 000 N\u00b7m. \u0160nek: kalen\u00fd 42CrMo4. Kolo: odst\u0159ediv\u011b lit\u00fd fosforov\u00fd bronz. Chlazen\u00ed: ventil\u00e1tor s nucen\u00fdm ob\u011bhem vzduchu namontovan\u00fd p\u0159\u00edmo na sk\u0159\u00edni \u0161nekov\u00e9ho p\u0159evodu. Teplota sk\u0159\u00edn\u011b stabilizov\u00e1na na 82 stupn\u00edch Celsia \u2013 v r\u00e1mci limitu 90 stup\u0148\u016f pro vysokoteplotn\u00ed syntetick\u00e9 plastick\u00e9 mazivo. Trojit\u00e1 labyrintov\u00e1 t\u011bsn\u011bn\u00ed s odvzdu\u0161\u0148ovac\u00edm filtrem zabr\u00e1nila vnik\u00e1n\u00ed cementov\u00e9ho prachu. \u017divotnost p\u0159i t\u0159\u00edsm\u011bnn\u00e9m nep\u0159etr\u017eit\u00e9m provozu: 3 a\u017e 4 roky na kolo (\u0161nek p\u0159e\u017eije dv\u011b v\u00fdm\u011bny kol).<\/p>\n

<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
\n
\nOt\u00e1zka: M\u016f\u017ee \u0161nekov\u00fd p\u0159evod kore\u010dkov\u00e9ho elev\u00e1toru n\u011bkdy pou\u017e\u00edt dvouchod\u00fd \u0161nek pro lep\u0161\u00ed \u00fa\u010dinnost?<\/summary>\n

Teoreticky by dvouchod\u00fd p\u00e1r se samostatn\u00fdm zadr\u017eovac\u00edm za\u0159\u00edzen\u00edm (dorazem zp\u011btn\u00e9ho chodu) na v\u00fdstupn\u00edm h\u0159\u00eddeli mohl zajistit jak \u00fa\u010dinnost, tak i ochranu proti zp\u011btn\u00e9mu chodu. V praxi se tato konfigurace u kore\u010dkov\u00fdch elev\u00e1tor\u016f pou\u017e\u00edv\u00e1 jen z\u0159\u00eddka, proto\u017ee doraz zp\u011btn\u00e9ho chodu zvy\u0161uje slo\u017eitost, n\u00e1klady a potenci\u00e1ln\u00ed riziko jedin\u00e9ho bodu selh\u00e1n\u00ed, kter\u00e9mu se samosvorn\u00fd jednochod\u00fd p\u00e1r vyh\u00fdb\u00e1. Sn\u00ed\u017een\u00ed \u00fa\u010dinnosti jednochod\u00e9ho p\u00e1ru (obvykle o 15 a\u017e 30 procentn\u00edch bod\u016f m\u00e9n\u011b ne\u017e u dvouchod\u00e9ho) je akceptov\u00e1no jako pojistn\u00e9 za inherentn\u00ed mechanick\u00e9 samosvorn\u00e9 bez dal\u0161\u00edch komponent. N\u011bkolik instalac\u00ed, kter\u00e9 pou\u017e\u00edvaj\u00ed dvouchod\u00e9 p\u00e1ry se dorazy zp\u011btn\u00e9ho chodu, jsou obvykle velmi kapacitn\u00ed cementov\u00e9 elev\u00e1tory, kde \u00faspora energie ospravedl\u0148uje zv\u00fd\u0161enou mechanickou slo\u017eitost a \u00fadr\u017eb\u00e1\u0159sk\u00fd t\u00fdm m\u00e1 odborn\u00e9 znalosti k pravideln\u00fdm kontrol\u00e1m dorazu zp\u011btn\u00e9ho chodu.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak typ \u0159et\u011bzu kore\u010dkov\u00e9ho elev\u00e1toru (v\u00e1le\u010dkov\u00fd \u0159et\u011bz vs. odst\u0159ediv\u00fd \u0159emen) ovliv\u0148uje specifikaci \u0161nekov\u00e9ho p\u0159evodu?<\/summary>\n

V\u00e1le\u010dkov\u00e9 \u0159et\u011bzov\u00e9 elev\u00e1tory vytv\u00e1\u0159ej\u00ed vy\u0161\u0161\u00ed radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed v\u00fdstupn\u00ed h\u0159\u00eddele ne\u017e p\u00e1sov\u00e9 elev\u00e1tory, proto\u017ee \u0159et\u011bzy jsou na jednotku d\u00e9lky t\u011b\u017e\u0161\u00ed a pracuj\u00ed ni\u017e\u0161\u00edmi rychlostmi (co\u017e vy\u017eaduje vy\u0161\u0161\u00ed to\u010div\u00fd moment). \u0158et\u011bzov\u00e9 elev\u00e1tory tak\u00e9 vytv\u00e1\u0159ej\u00ed v\u00fdrazn\u011bj\u0161\u00ed plnic\u00ed r\u00e1zy ve f\u00e1zi 1, proto\u017ee rozte\u010d kore\u010dk\u016f je v\u011bt\u0161\u00ed a ka\u017ed\u00e1 kore\u010dkov\u00e1 elev\u00e1torka se pln\u00ed n\u00e1hle. P\u00e1sov\u00e9 elev\u00e1tory b\u011b\u017e\u00ed rychleji (obvykle 2 a\u017e 4 m\/s oproti 1 a\u017e 2 m\/s u \u0159et\u011bzu), maj\u00ed plynulej\u0161\u00ed pln\u011bn\u00ed a vytv\u00e1\u0159ej\u00ed ni\u017e\u0161\u00ed radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed. \u0160nekov\u00fd p\u0159evod pro \u0159et\u011bzov\u00fd elev\u00e1tor by m\u011bl b\u00fdt o jeden r\u00e1m v\u011bt\u0161\u00ed ne\u017e p\u00e1sov\u00fd elev\u00e1tor se stejnou propustnost\u00ed \u2013 \u0159et\u011bzov\u00fd elev\u00e1tor s v\u00fdkonem 100 tun za hodinu obvykle pot\u0159ebuje p\u00e1r \u0161nekov\u00fdch p\u0159evod\u016f s rozte\u010d\u00ed 200 mm, zat\u00edmco ekvivalentn\u00ed p\u00e1sov\u00fd elev\u00e1tor m\u016f\u017ee pou\u017e\u00edt 160 mm.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00e1 je o\u010dek\u00e1van\u00e1 \u017eivotnost \u0161nekov\u00e9ho p\u0159evodu na kore\u010dkov\u00e9m elev\u00e1toru?<\/summary>\n

U spr\u00e1vn\u011b specifikovan\u00e9ho p\u00e1ru s odpov\u00eddaj\u00edc\u00edm provozn\u00edm faktorem vydr\u017e\u00ed bronzov\u00e9 kolo obvykle 4 a\u017e 8 let p\u0159i jednosm\u011bnn\u00e9m provozu (2 500 hodin ro\u010dn\u011b), 2,5 a\u017e 5 let p\u0159i dvousm\u011bnn\u00e9m provozu (5 000 hodin ro\u010dn\u011b) a 1,5 a\u017e 3,5 let p\u0159i nep\u0159etr\u017eit\u00e9m t\u0159\u00edsm\u011bnn\u00e9m provozu (7 500 hodin ro\u010dn\u011b). Ocelov\u00fd \u0161nek obvykle vydr\u017e\u00ed d\u00e9le ne\u017e 2 a\u017e 3 v\u00fdm\u011bny kol, proto\u017ee tvrd\u0161\u00ed ocelov\u00fd povrch se oproti m\u011bk\u010d\u00edmu bronzu m\u011b\u0159iteln\u011b neopot\u0159ebov\u00e1v\u00e1. V\u016fli je t\u0159eba sledovat ka\u017edoro\u010dn\u011b \u2013 kdy\u017e v\u016fle dos\u00e1hne 1,5n\u00e1sobku hodnoty uveden\u00e9 v dodac\u00edm certifik\u00e1tu, napl\u00e1nujte v\u00fdm\u011bnu kola v p\u0159\u00ed\u0161t\u00edm servisn\u00edm okn\u011b. Hlavn\u00edm faktorem omezuj\u00edc\u00edm \u017eivotnost je nep\u0159etr\u017eit\u00e9 cyklick\u00e9 zat\u00ed\u017een\u00ed ze \u010dty\u0159f\u00e1zov\u00e9ho cyklu kroutic\u00edho momentu, kter\u00e9 hromad\u00ed kontaktn\u00ed \u00fanavu na boc\u00edch zub\u016f bronzov\u00e9ho kola rychleji ne\u017e u ust\u00e1len\u00fdch dopravn\u00edkov\u00fdch aplikac\u00ed.<\/p>\n<\/details>\n

\nOt\u00e1zka: Pot\u0159ebuji certifikaci ATEX na \u0161nekov\u00e9m p\u0159evodu pro kore\u010dkov\u00fd elev\u00e1tor na obil\u00ed?<\/summary>\n

Pokud se sk\u0159\u00ed\u0148 \u0161nekov\u00e9ho p\u0159evodu nach\u00e1z\u00ed v oblasti klasifikovan\u00e9 jako z\u00f3na ATEX 21 (b\u011bhem norm\u00e1ln\u00edho provozu je pravd\u011bpodobn\u00fd oblak prachu) nebo z\u00f3na 22 (b\u011bhem abnorm\u00e1ln\u00edho provozu je mo\u017en\u00fd oblak prachu), mus\u00ed sk\u0159\u00ed\u0148 spl\u0148ovat p\u0159\u00edslu\u0161nou kategorii za\u0159\u00edzen\u00ed ATEX. V praxi je v\u011bt\u0161ina \u0161nekov\u00fdch p\u0159evod\u016f kore\u010dkov\u00fdch elev\u00e1tor\u016f ut\u011bsn\u011bna a nem\u00e1 \u017e\u00e1dn\u00fd vnit\u0159n\u00ed zdroj zap\u00e1len\u00ed (\u017e\u00e1dn\u00e9 elektrick\u00e9 sou\u010d\u00e1sti, \u017e\u00e1dn\u00e9 jisk\u0159\u00edc\u00ed povrchy), tak\u017ee obvykle spl\u0148uj\u00ed po\u017eadavky z\u00f3ny 22 bez \u00faprav. Z\u00f3na 21 m\u016f\u017ee vy\u017eadovat dal\u0161\u00ed certifika\u010dn\u00ed dokumentaci nebo ov\u011b\u0159en\u00ed teploty povrchu sk\u0159\u00edn\u011b (teplota sk\u0159\u00edn\u011b mus\u00ed z\u016fstat pod teplotou samovzn\u00edcen\u00ed prachu, kter\u00e1 je u zrnit\u00e9ho prachu obvykle 400 a\u017e 500 stup\u0148\u016f Celsia \u2013 co\u017e je v\u00fdrazn\u011b nad b\u011b\u017en\u00fdmi provozn\u00edmi teplotami). \u00dadaje o teplot\u011b sk\u0159\u00edn\u011b p\u0159evodu ze specifika\u010dn\u00edho listu v\u00e1m sd\u011bl\u00ed v\u00e1\u0161 posuzovatel ATEX.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak zabr\u00e1n\u00edm vniknut\u00ed cementov\u00e9ho prachu do sk\u0159\u00edn\u011b \u0161nekov\u00e9ho p\u0159evodu u sl\u00ednkov\u00e9ho elev\u00e1toru?<\/summary>\n

T\u0159i vrstvy ochrany. Zaprv\u00e9, trojit\u00e9 labyrintov\u00e9 t\u011bsn\u011bn\u00ed na vstupn\u00edm i v\u00fdstupn\u00edm h\u0159\u00eddeli \u2013 labyrinty vytv\u00e1\u0159ej\u00ed klikatou dr\u00e1hu, po kter\u00e9 odst\u0159ediv\u00e1 s\u00edla a gravitace br\u00e1n\u00ed pohybu jemn\u00fdch \u010d\u00e1stic. Zadruh\u00e9, odvzdu\u0161\u0148ovac\u00ed filtr se slinut\u00fdm bronzov\u00fdm nebo plst\u011bn\u00fdm prvkem, kter\u00fd umo\u017e\u0148uje vzduchu roztahovat se a smr\u0161\u0165ovat s teplotn\u00edmi cykly (kol\u00eds\u00e1n\u00ed okoln\u00edho prost\u0159ed\u00ed ve dne v noci m\u016f\u017ee uvnit\u0159 sk\u0159\u00edn\u011b vytv\u00e1\u0159et podtlak, kter\u00fd nas\u00e1v\u00e1 prach kolem b\u0159itov\u00fdch t\u011bsn\u011bn\u00ed) a z\u00e1rove\u0148 blokuje \u010d\u00e1stice. Zat\u0159et\u00ed, pozitivn\u00ed vnit\u0159n\u00ed tlak \u2013 n\u011bkter\u00e9 instalace pou\u017e\u00edvaj\u00ed mal\u00e9 nep\u0159etr\u017eit\u00e9 proplachov\u00e1n\u00ed vzduchem (0,5 a\u017e 1 litr filtrovan\u00e9ho stla\u010den\u00e9ho vzduchu za minutu) vst\u0159ikovan\u00e9 do sk\u0159\u00edn\u011b k udr\u017een\u00ed m\u00edrn\u00e9ho p\u0159etlaku, \u010d\u00edm\u017e se zabr\u00e1n\u00ed vniknut\u00ed prachu z okoln\u00edho vzduchu. Trojit\u00fd p\u0159\u00edstup prodlu\u017euje \u017eivotnost t\u011bsn\u011bn\u00ed z 6 na 12 m\u011bs\u00edc\u016f (jedno b\u0159itov\u00e9 t\u011bsn\u011bn\u00ed v cementu) na 3 a\u017e 5 let (trojit\u00fd labyrint + odvzdu\u0161\u0148ovac\u00ed filtr + tlak).<\/p>\n<\/details>\n<\/div>\n

<\/p>\n

Kore\u010dkov\u00e9 elev\u00e1tory p\u0159edstavuj\u00ed nejn\u00e1ro\u010dn\u011bj\u0161\u00ed aplikaci pro vertik\u00e1ln\u00ed dopravu \u0161nekov\u00fdch p\u0159evod\u016f \u2013 kombinuj\u00ed absolutn\u00ed po\u017eadavek na samosvornou ochranu proti zp\u011btn\u00e9mu pohybu s cyklick\u00fdm profilem to\u010div\u00e9ho momentu, kter\u00fd vrchol\u00ed 1,3 a\u017e 1,8n\u00e1sobkem ust\u00e1len\u00e9ho stavu b\u011bhem pln\u011bn\u00ed, spou\u0161t\u011bc\u00edm momentem, kter\u00fd dosahuje 2,0 a\u017e 3,0n\u00e1sobku ust\u00e1len\u00e9ho stavu se zat\u00ed\u017een\u00fdm \u0159et\u011bzem, a radi\u00e1ln\u00edm zat\u00ed\u017een\u00edm \u0159et\u011bzu, kter\u00e9 m\u016f\u017ee v\u00fdrazn\u011b p\u0159ekro\u010dit dimenzov\u00e1n\u00ed \u0159\u00edzen\u00e9 momentem. Specifikace \u0161nekov\u00e9ho p\u0159evodu kore\u010dkov\u00e9ho elev\u00e1toru pouze na z\u00e1klad\u011b ust\u00e1len\u00e9ho zvedac\u00edho momentu \u2013 nejb\u011b\u017en\u011bj\u0161\u00ed zkratka \u2013 mine kontrolu plnic\u00edho n\u00e1r\u016fstu, spou\u0161t\u011bc\u00edho multiplik\u00e1toru a radi\u00e1ln\u00edho zat\u00ed\u017een\u00ed, z nich\u017e kter\u00fdkoli m\u016f\u017ee b\u00fdt z\u00e1vazn\u00fdm omezen\u00edm. \u010cty\u0159f\u00e1zov\u00fd cyklus momentu je z\u00e1kladem dimenzov\u00e1n\u00ed, sklon je v\u017edy t\u00e9m\u011b\u0159 vertik\u00e1ln\u00ed (je povinn\u00fd jeden start) a materi\u00e1lov\u00e9 prost\u0159ed\u00ed ur\u010duje metalurgick\u00fd a t\u011bsnic\u00ed bal\u00ed\u010dek. Korej\u0161t\u00ed, japon\u0161t\u00ed a vietnam\u0161t\u00ed v\u00fdrobci origin\u00e1ln\u00edch za\u0159\u00edzen\u00ed (OEM) p\u016fsob\u00edc\u00ed v obiln\u00e9m, chemick\u00e9m a cement\u00e1\u0159sk\u00e9m pr\u016fmyslu se b\u011b\u017en\u011b setk\u00e1vaj\u00ed se v\u0161emi t\u0159emi kategoriemi materi\u00e1l\u016f v jednom za\u0159\u00edzen\u00ed \u2013 a specifikace \u0161nekov\u00e9ho p\u0159evodu mus\u00ed odpov\u00eddat ka\u017ed\u00e9mu elev\u00e1toru individu\u00e1ln\u011b.<\/p>\n

Pro konstruk\u010dn\u00ed a n\u00e1kupn\u00ed t\u00fdmy, kter\u00e9 specifikuj\u00ed p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f pro kore\u010dkov\u00e9 elev\u00e1tory, prov\u00e1d\u00ed na\u0161e technick\u00e9 odd\u011blen\u00ed \u010dty\u0159f\u00e1zovou anal\u00fdzu kroutic\u00edho momentu a kontrolu radi\u00e1ln\u00edho zat\u00ed\u017een\u00ed \u0159et\u011bzov\u00e9ho nap\u011bt\u00ed v porovn\u00e1n\u00ed s parametry va\u0161eho elev\u00e1toru. Standardn\u00ed katalog fosforov\u011b bronzov\u00e9 \u0161nekov\u00e9 p\u0159evodovky<\/a> Pokr\u00fdv\u00e1 rozte\u010de od 80 do 250 mm v jednochod\u00fdch konfigurac\u00edch s kompletn\u00ed dokumentac\u00ed DIN. K dispozici jsou zak\u00e1zkov\u00e9 kombinace materi\u00e1l\u016f (nerezov\u00e1 ocel, hlin\u00edkov\u00fd bronz, odst\u0159ediv\u00e9 lit\u00ed) a pouzdra kompatibiln\u00ed s ATEX s dodac\u00ed lh\u016ftou 4 a\u017e 6 t\u00fddn\u016f \u2013 za\u0161lete popt\u00e1vku specifikace pohonu kore\u010dkov\u00e9ho v\u00fdtahu<\/a> s \u00fadaji o napnut\u00ed \u0159et\u011bzu a n\u00e1\u0161 t\u00fdm v\u00e1m do jednoho pracovn\u00edho dne za\u0161le doporu\u010den\u00ed.<\/p>\n

<\/p>\n

\n

Dimenzov\u00e1n\u00ed \u0161nekov\u00e9ho p\u0159evodu pro pohon kore\u010dkov\u00e9ho elev\u00e1toru?<\/h3>\n

Za\u0161lete n\u00e1m v\u00fd\u0161ku zdvihu elev\u00e1toru, kapacitu (t\/h), velikost lopaty, typ \u0159et\u011bzu nebo \u0159emene, dopravovan\u00fd materi\u00e1l a ve\u0161ker\u00e1 omezen\u00ed prost\u0159ed\u00ed (ATEX, chemik\u00e1lie, vysok\u00e1 teplota). Provedeme \u010dty\u0159f\u00e1zovou anal\u00fdzu kroutic\u00edho momentu, zkontrolujeme radi\u00e1ln\u00ed \u00fanosnost a doporu\u010d\u00edme spr\u00e1vn\u00e9 p\u00e1rov\u00e1n\u00ed materi\u00e1l\u016f \u2013 obvykle do jednoho pracovn\u00edho dne.<\/p>\n

Vy\u017e\u00e1dejte si specifikaci pohonu kore\u010dkov\u00e9ho elev\u00e1toru \u2192<\/a><\/p>\n<\/div>\n

upravit u\u017eivatelem Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Korea Ever-Power \u00b7 Application Engineering Guide Worm and Worm Wheel for Bucket Elevator Drives \u2014 Vertical Lift Guide A bucket elevator with 40 full buckets suspended on a 25-metre chain stores enough gravitational energy to accelerate backward to destructive speed in under 3 seconds if the drive fails to hold. The worm gear pair is […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2821],"tags":[],"class_list":["post-1350","post","type-post","status-publish","format-standard","hentry","category-worm-and-worm-wheel"],"_links":{"self":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/comments?post=1350"}],"version-history":[{"count":1,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1350\/revisions"}],"predecessor-version":[{"id":1353,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1350\/revisions\/1353"}],"wp:attachment":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/media?parent=1350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/categories?post=1350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/tags?post=1350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}