{"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\/sk\/worm-and-worm-wheel-for-bucket-elevator-drives-vertical-lift-guide\/","title":{"rendered":"\u0160nekov\u00e1 \u0161nekov\u00e1 n\u00e1prava a z\u00e1vitovkov\u00e9 koleso pre pohony kore\u010dkov\u00fdch elev\u00e1torov \u2013 Sprievodca vertik\u00e1lnym zdv\u00edhan\u00edm"},"content":{"rendered":"
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Korea Ever-Power \u00b7 Sprievodca aplika\u010dn\u00fdm in\u017einierstvom<\/p>\n

\u0160nekov\u00e1 \u0161nekov\u00e1 n\u00e1prava a z\u00e1vitovkov\u00e9 koleso pre pohony kore\u010dkov\u00fdch elev\u00e1torov \u2013 Sprievodca vertik\u00e1lnym zdv\u00edhan\u00edm<\/h1>\n

Kore\u010dkov\u00fd elev\u00e1tor so 40 pln\u00fdmi vedrami zavesen\u00fdmi na 25-metrovej re\u0165azi uklad\u00e1 dostatok gravita\u010dnej energie na zr\u00fdchlenie sp\u00e4\u0165 na de\u0161trukt\u00edvnu r\u00fdchlos\u0165 za menej ako 3 sekundy, ak pohon zlyh\u00e1 udr\u017ea\u0165. Z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r je komponent stojaci medzi riaden\u00fdm zdvihom a katastrofick\u00fdm sp\u00e4tn\u00fdm chodom. Pochopenie jeho za\u0165a\u017eovacieho cyklu nie je volite\u013en\u00e9 \u2013 je to z\u00e1klad pre dimenzovanie.<\/p>\n

Porozpr\u00e1vajte sa s technikom pohonu v\u00fd\u0165ahu \u2192<\/a><\/p>\n<\/div>\n

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R\u00fdchla odpove\u010f<\/div>\n

Kore\u010dkov\u00e9 elev\u00e1tory vy\u017eaduj\u00fa jednochodov\u00e9 p\u00e1ry z\u00e1vitovkov\u00fdch prevodov so siln\u00fdm samosvorom (uhol n\u00e1behu 2 a\u017e 5 stup\u0148ov), preto\u017ee ka\u017ed\u00e9 zastavenie prev\u00e1dzky umiest\u0148uje pln\u00e9 zavesen\u00e9 bremeno gravit\u00e1ciou na hnac\u00ed hriade\u013e. Cyklus kr\u00fatiaceho momentu m\u00e1 \u0161tyri odli\u0161n\u00e9 f\u00e1zy \u2013 plniaci n\u00e1por, st\u00e1ly vertik\u00e1lny zdvih, n\u00e1raz pri vypr\u00e1zd\u0148ovan\u00ed v hlave a n\u00e1vrat pri \u013eahkom za\u0165a\u017een\u00ed do vypr\u00e1zdnen\u00e9ho stavu \u2013 a p\u00e1r z\u00e1vitovkov\u00fdch prevodov mus\u00ed pre\u017ei\u0165 vrchol ka\u017edej f\u00e1zy, nielen priemer. Sp\u00fa\u0161\u0165ac\u00ed kr\u00fatiaci moment s plne za\u0165a\u017eenou re\u0165azou alebo reme\u0148om dosahuje 2,0 a\u017e 3,0-n\u00e1sobok ust\u00e1len\u00e9ho zdv\u00edhacieho kr\u00fatiaceho momentu v d\u00f4sledku statick\u00e9ho trenia a zhutnenia materi\u00e1lu. Nap\u00e4tie re\u0165aze alebo reme\u0148a tie\u017e vytv\u00e1ra zna\u010dn\u00e9 radi\u00e1lne za\u0165a\u017eenie na v\u00fdstupnom hriadeli \u2013 zvy\u010dajne 1,5 a\u017e 3-n\u00e1sobok tangenci\u00e1lnej hnacej sily \u2013 ktor\u00e9 sa mus\u00ed overi\u0165 oproti radi\u00e1lnemu za\u0165a\u017eeniu p\u00e1ru z\u00e1vitovkov\u00fdch prevodov. Materi\u00e1lov\u00e9 prostredie (zrnit\u00fd prach, chemick\u00fd pr\u00e1\u0161ok, cementov\u00fd slinok) ur\u010duje p\u00e1rovanie materi\u00e1lov, typ tesnenia a v aplik\u00e1ci\u00e1ch s obil\u00edm m\u00f4\u017ee by\u0165 potrebn\u00e9 puzdro s certifik\u00e1ciou ATEX.<\/p>\n<\/div>\n

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Pre\u010do kore\u010dkov\u00e9 elev\u00e1tory vy\u017eaduj\u00fa samosvorn\u00e9 p\u00e1ry z\u00e1vitovkov\u00fdch prevodov<\/h2>\n

\"Princ\u00edp<\/p>\n

Kore\u010dkov\u00fd elev\u00e1tor je vertik\u00e1lny dopravn\u00edk, ktor\u00fd zdv\u00edha sypk\u00fd materi\u00e1l v samostatn\u00fdch vedr\u00e1ch pripevnen\u00fdch k s\u00favislej re\u0165azi alebo p\u00e1su. Na rozdiel od p\u00e1sov\u00e9ho dopravn\u00edka, kde sa uhol sklonu men\u00ed od 0 do 45 stup\u0148ov, kore\u010dkov\u00fd elev\u00e1tor pracuje na \u00farovni alebo bl\u00edzko 90 stup\u0148ov \u2013 \u010do je skuto\u010dn\u00fd vertik\u00e1lny zdvih. Gravita\u010dn\u00e1 potenci\u00e1lna energia ulo\u017een\u00e1 v nalo\u017eenom st\u00fapaj\u00facom p\u00e1se je v\u017edy dostato\u010dne ve\u013ek\u00e1 na to, aby poh\u00e1\u0148ala syst\u00e9m dozadu, ak sa uvo\u013en\u00ed vstupn\u00fd pohon.<\/p>\n

Predstavte si typick\u00fd stredne ve\u013ek\u00fd kore\u010dkov\u00fd elev\u00e1tor na obilie: 40 vedier s kapacitou 12 kg, nalo\u017een\u00fdch pribli\u017ene na 80 percent (9,6 kg na vedro), na v\u00fd\u0161ke zdvihu 25 metrov. Celkov\u00e9 zavesen\u00e9 za\u0165a\u017eenie na st\u00fapaj\u00facej strane je 40 \u00d7 9,6 = 384 kg. Klesaj\u00faca pr\u00e1zdna strana v\u00e1\u017ei pribli\u017ene 40 \u00d7 2,5 kg (hmotnos\u0165 vedra) = 100 kg. \u010cist\u00e1 gravita\u010dn\u00e1 nevyv\u00e1\u017eenos\u0165: 284 kg p\u00f4sobiacich smerom nadol na st\u00fapaj\u00facej strane. Pri polomere re\u0165azov\u00e9ho kolesa 200 mm je gravita\u010dn\u00fd kr\u00fatiaci moment 284 \u00d7 9,81 \u00d7 0,20 = 557 N\u00b7m \u2013 trvalo p\u00f4sob\u00ed na v\u00fdstupn\u00fd hriade\u013e v\u017edy, ke\u010f je elev\u00e1tor nalo\u017een\u00fd a stoj\u00ed.<\/p>\n

Z\u00e1vitovkov\u00e9 koleso mus\u00ed odol\u00e1va\u0165 tomuto kr\u00fatiacemu momentu bez toho, aby sa prek\u013azlo dozadu. Viacchodov\u00e9 koleso s uhlom n\u00e1behu nad uhlom trenia to neudr\u017e\u00ed \u2013 ly\u017eice zr\u00fdch\u013euj\u00fa dozadu, re\u0165az sa trh\u00e1, materi\u00e1l sa vysype do \u010dasti p\u00e4ty a mechanick\u00e9 po\u0161kodenie re\u0165aze, ozuben\u00fdch kolies a ly\u017e\u00edc nasleduje v priebehu nieko\u013ek\u00fdch sek\u00fand. Jednochodov\u00e9 z\u00e1vitovkov\u00e9 koles\u00e1 s uhlom n\u00e1behu pod 5 stup\u0148ov s\u00fa \u0161tandardom pre v\u0161etky pohony kore\u010dkov\u00fdch elev\u00e1torov. Zn\u00ed\u017eenie \u00fa\u010dinnosti (zvy\u010dajne 40 a\u017e 55 percent) predstavuje akceptovan\u00e9 n\u00e1klady na garantovan\u00e9 dr\u017eanie v d\u00f4sledku gravit\u00e1cie.<\/p>\n

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\u0160tvorf\u00e1zov\u00fd cyklus kr\u00fatiaceho momentu kore\u010dkov\u00e9ho elev\u00e1tora<\/h2>\n
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Na rozdiel od p\u00e1sov\u00e9ho dopravn\u00edka, ktor\u00fd be\u017e\u00ed s pribli\u017ene kon\u0161tantn\u00fdm kr\u00fatiacim momentom, kore\u010dkov\u00fd elev\u00e1tor vnucuje cyklick\u00fd kr\u00fatiaci moment z\u00e1vitovkov\u00e9mu ozuben\u00e9mu kolesu. \u0160tyri f\u00e1zy sa opakuj\u00fa s ka\u017ed\u00fdm ozuben\u00fdm kolesom prech\u00e1dzaj\u00facim cez plniaci bod a v\u00fdtla\u010dn\u00fa hlavu. Vrcholov\u00fd kr\u00fatiaci moment sa vyskytuje po\u010das f\u00e1zy 1 (plniaci n\u00e1por) a f\u00e1zy 3 (n\u00e1raz pri v\u00fdtla\u010dnom n\u00e1por) \u2013 a z\u00e1vitovkov\u00e9 ozuben\u00e9 koleso mus\u00ed by\u0165 dimenzovan\u00e9 na tieto \u0161pi\u010dky, nie na priemer f\u00e1zy 2.<\/p>\n

Ni\u017e\u0161ie uveden\u00fd diagram cyklu zobrazuje ka\u017ed\u00fa f\u00e1zu pod\u013ea jej kr\u00fatiacej charakteristiky a kon\u0161truk\u010dn\u00e9ho parametra z\u00e1vitovkov\u00e9ho prevodu, ktor\u00fd najviac za\u0165a\u017euje.<\/p>\n<\/div>\n

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

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01<\/div>\n
F\u00e1za 1 \u2013 N\u00e1rast plnenia<\/div>\n

Ka\u017ed\u00e1 ly\u017eica naber\u00e1 materi\u00e1l z n\u00e1sypky. N\u00e1hle pridanie hmoty vytv\u00e1ra n\u00e1rast kr\u00fatiaceho momentu 1,3 a\u017e 1,8-n\u00e1sobok ust\u00e1len\u00e9ho stavu, ke\u010f ly\u017eica prech\u00e1dza z pr\u00e1zdneho do nalo\u017een\u00e9ho stavu a z\u00e1rove\u0148 st\u00e1le zr\u00fdch\u013euje smerom nahor.<\/p>\n

Nap\u00e4tia: oh\u00fdbanie kore\u0148a zuba, \u00fanava materi\u00e1lu pri kontakte<\/div>\n<\/div>\n
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02<\/div>\n
F\u00e1za 2 \u2013 Stabiln\u00fd vertik\u00e1lny zdvih<\/div>\n

Nalo\u017een\u00e9 vedr\u00e1 sa pohybuj\u00fa vertik\u00e1lne kon\u0161tantnou r\u00fdchlos\u0165ou. Kr\u00fatiaci moment je stabiln\u00fd a predv\u00eddate\u013en\u00fd \u2013 z\u00e1kladn\u00e1 hodnota pre tepeln\u00e9 dimenzovanie. T\u00e1to f\u00e1za predstavuje 60 a\u017e 70 percent celkov\u00e9ho \u010dasu cyklu.<\/p>\n

Nap\u00e4tia: tepeln\u00e9 za\u0165a\u017eenie, opotrebenie (nepretr\u017eit\u00e9 k\u013azanie)<\/div>\n<\/div>\n
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03<\/div>\n
F\u00e1za 3 \u2013 Dopad vyp\u00fa\u0161\u0165ania<\/div>\n

Na hlavnom ozubenom kolese sa vedro prevr\u00e1ti a materi\u00e1l sa vysype odstredivou silou a gravit\u00e1ciou. N\u00e1hla strata hmotnosti sp\u00f4sob\u00ed prechodn\u00e9 zn\u00ed\u017eenie kr\u00fatiaceho momentu, po ktorom nasleduje prerozdelenie napnutia re\u0165aze \u2013 kr\u00e1tkodob\u00fd n\u00e1rast kr\u00fatiaceho momentu 1,2 a\u017e 1,5-n\u00e1sobok ust\u00e1len\u00e9ho stavu.<\/p>\n

Nap\u00e4tia: dynamick\u00e9 zvr\u00e1tenie za\u0165a\u017eenia, r\u00e1zov\u00e9 nap\u00e4tie re\u0165aze<\/div>\n<\/div>\n
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04<\/div>\n
F\u00e1za 4 \u2013 N\u00e1vrat pr\u00e1zdneho vozidla<\/div>\n

Pr\u00e1zdne vedr\u00e1 klesaj\u00fa po sp\u00e4tnom toku. Po\u017eadovan\u00fd kr\u00fatiaci moment kles\u00e1 pribli\u017ene na 30 a\u017e 40 percent ust\u00e1len\u00e9ho stavu, preto\u017ee gravit\u00e1cia pom\u00e1ha klesa\u0165 pr\u00e1zdnym vedr\u00e1m. T\u00e1to f\u00e1za zabezpe\u010duje \u010diasto\u010dn\u00e9 tepeln\u00e9 sp\u00e4tn\u00e9 z\u00edskavanie.<\/p>\n

Stres: minim\u00e1lny (f\u00e1za zotavenia)<\/div>\n<\/div>\n<\/div>\n

D\u00f4sledky dizajnu:<\/strong> Menovit\u00fd kr\u00fatiaci moment p\u00e1ru z\u00e1vitovkov\u00fdch kolies mus\u00ed prekro\u010di\u0165 vrchol plniaceho r\u00e1zu f\u00e1zy 1 (1,3 a\u017e 1,8-n\u00e1sobok ust\u00e1len\u00e9ho stavu), nie priemer f\u00e1zy 2. Pou\u017eitie samotn\u00e9ho kr\u00fatiaceho momentu v ust\u00e1lenom stave f\u00e1zy 2 na \u0161pecifik\u00e1ciu \u2013 najbe\u017enej\u0161ia skratka pri dimenzovan\u00ed \u2013 podhodnocuje p\u00e1r o 30 a\u017e 80 percent. Po 8 000 a\u017e 15 000 hodin\u00e1ch pri tomto podhodnoten\u00ed sa na bronzovom kolese na za\u0165a\u017een\u00fdch bokoch vyvinie jamkov\u00e1 tvorba a za\u010dne sa zv\u00e4\u010d\u0161ova\u0165 v\u00f4\u013ea. P\u00e1r nakoniec zlyh\u00e1 nie v d\u00f4sledku jedin\u00e9ho pre\u0165a\u017eenia, ale v d\u00f4sledku kumulat\u00edvnej \u00fanavy pri ka\u017edom plniacom cykle.<\/p>\n

Situ\u00e1cia pri spusten\u00ed je e\u0161te hor\u0161ia.<\/strong> Kore\u010dkov\u00fd elev\u00e1tor, ktor\u00fd sa zastav\u00ed s plne za\u0165a\u017een\u00fdm st\u00fapaj\u00facim ramenom a re\u0161tartuje sa, zaznamen\u00e1va rozbehov\u00fd kr\u00fatiaci moment 2,0 a\u017e 3,0-n\u00e1sobok ust\u00e1len\u00e9ho zdv\u00edhacieho kr\u00fatiaceho momentu. Statick\u00e9 trenie re\u0165aze na ozubenom kolese, usadzovanie materi\u00e1lu v kore\u010dk\u00e1ch po\u010das zastavenia a zotrva\u010dnos\u0165 za\u0165a\u017eenej re\u0165aze sa sp\u00e1jaj\u00fa. Z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r mus\u00ed pre\u017ei\u0165 tento rozbehov\u00fd vrchol pri ka\u017edom spusten\u00ed zmeny, ka\u017edom preru\u0161en\u00ed nap\u00e1jania a ka\u017edom obnoven\u00ed prev\u00e1dzky po n\u00fadzovom zastaven\u00ed. Prev\u00e1dzkov\u00fd faktor pre prev\u00e1dzku kore\u010dkov\u00e9ho elev\u00e1tora by mal by\u0165 minim\u00e1lne 2,0 a\u017e 2,5.<\/p>\n

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Napnutie re\u0165aze a radi\u00e1lne za\u0165a\u017eenie na v\u00fdstupnom hriadeli z\u00e1vitovkov\u00e9ho prevodu<\/h2>\n

Rozmer \u0161pecifik\u00e1cie z\u00e1vitovkov\u00e9ho prevodu kore\u010dkov\u00e9ho elev\u00e1tora, s ktor\u00fdm sa aplik\u00e1cie p\u00e1sov\u00fdch dopravn\u00edkov stret\u00e1vaj\u00fa zriedkavo, je radi\u00e1lne za\u0165a\u017eenie vyv\u00edjan\u00e9 nap\u00e4t\u00edm re\u0165aze alebo reme\u0148a na v\u00fdstupn\u00fd hriade\u013e. V\u00fdstupn\u00fd hriade\u013e z\u00e1vitovkov\u00e9ho prevodu nesie hlavn\u00e9 ozuben\u00e9 koleso a ozuben\u00e9 koleso je \u0165ahan\u00e9 smerom nadol kombinovanou hmotnos\u0165ou nalo\u017een\u00fdch st\u00fapaj\u00facich vedier a samotnej re\u0165aze. T\u00e1to sila p\u00f4sob\u00ed ako radi\u00e1lne za\u0165a\u017eenie na lo\u017eisk\u00e1 v\u00fdstupn\u00e9ho hriade\u013ea.<\/p>\n

\n\n\n\n\n\n\n\n
Ve\u013ekos\u0165 v\u00fd\u0165ahu<\/th>\nTypick\u00e1 kapacita<\/th>\nNapnutie re\u0165aze (napnut\u00e1 strana)<\/th>\nRadi\u00e1lne za\u0165a\u017eenie na v\u00fdstupnom hriadeli<\/th>\nTypick\u00e1 stredov\u00e1 vzdialenos\u0165<\/th>\n<\/tr>\n<\/thead>\n
Mal\u00fd (10 \u2013 30 t\/h)<\/td>\nObilie, semen\u00e1, pelety<\/td>\n3 000 \u2013 8 000 N<\/td>\n4 500 \u2013 12 000 N<\/td>\n80 \u2013 125 mm<\/td>\n<\/tr>\n
Stredn\u00fd (30 \u2013 80 t\/h)<\/td>\nChemick\u00fd pr\u00e1\u0161ok, hnojivo<\/td>\n8 000 \u2013 18 000 N<\/td>\n12 000 \u2013 27 000 N<\/td>\n125 \u2013 200 mm<\/td>\n<\/tr>\n
Ve\u013ek\u00fd (80 \u2013 200 t\/h)<\/td>\nCementov\u00fd slinok, 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\u00e1lne za\u0165a\u017eenie je pribli\u017ene 1,5-n\u00e1sobkom napnutia re\u0165aze na napnutej strane, preto\u017ee nap\u00e4tie na uvo\u013enenej strane prid\u00e1va zlo\u017eku v rovnakom smere. Toto radi\u00e1lne za\u0165a\u017eenie sa mus\u00ed porovna\u0165 s \u00fanosnos\u0165ou v\u00fdstupn\u00e9ho hriade\u013ea z\u00e1vitovkov\u00e9ho ozuben\u00e9ho kolesa. Ozuben\u00e9 koleso s dostato\u010dn\u00fdm kr\u00fatiacim momentom, ale nedostato\u010dn\u00fdm radi\u00e1lnym za\u0165a\u017een\u00edm, sa pokaz\u00ed na v\u00fdstupn\u00fdch lo\u017eisk\u00e1ch, a nie na zuboch ozuben\u00e9ho kolesa \u2013 tento sp\u00f4sob poruchy napodob\u0148uje chybu lo\u017eiska, ale vznik\u00e1 v chybe \u0161pecifik\u00e1cie.<\/p>\n

Pre stredn\u00e9 a ve\u013ek\u00e9 kore\u010dkov\u00e9 elev\u00e1tory, kde radi\u00e1lne za\u0165a\u017eenie presahuje \u0161tandardn\u00fa katal\u00f3gov\u00fa menovit\u00fa hodnotu v\u00fdstupn\u00e9ho lo\u017eiska, je rie\u0161en\u00edm bu\u010f z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r s v\u00e4\u010d\u0161ou ve\u013ekos\u0165ou r\u00e1mu (\u010do \u00famerne zvy\u0161uje nosnos\u0165), alebo usporiadanie stojat\u00fdch lo\u017e\u00edsk mimo telesa z\u00e1vitovkov\u00e9ho prevodu, ktor\u00e9 nesie radi\u00e1lne za\u0165a\u017eenie re\u0165aze samostatne. Druh\u00e1 mo\u017enos\u0165 je be\u017enej\u0161ia na ve\u013ek\u00fdch kore\u010dkov\u00fdch elev\u00e1toroch pre cement a bane, kde by za\u0165a\u017eenie re\u0165aze vy\u017eadovalo naddimenzovan\u00fd a neekonomick\u00fd z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r na pren\u00e1\u0161anie samotnej radi\u00e1lnej sily.<\/p>\n

<\/p>\n

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Pozn\u00e1mka k in\u017einierskemu stolu<\/div>\n

K\u00f3rejsk\u00fd mlyn na v\u00fdrobu krmiva pre zvierat\u00e1 uviedol do prev\u00e1dzky 25-metrov\u00fd kore\u010dkov\u00fd elev\u00e1tor s v\u00fdkonom 45 ton za hodinu. Z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r bol \u0161pecifikovan\u00fd s rozostupom 100 mm, modulom 4, jednochodov\u00fdm prevodov\u00fdm pomerom 50:1 \u2013 \u010do posta\u010duje pre vypo\u010d\u00edtan\u00fd ust\u00e1len\u00fd zdv\u00edhac\u00ed kr\u00fatiaci moment 320 N\u00b7m s SF 2.0, \u010do predstavuje po\u017eiadavku 640 N\u00b7m. Vybran\u00fd p\u00e1r bol dimenzovan\u00fd na 680 N\u00b7m. Elev\u00e1tor bol v prev\u00e1dzke 11 mesiacov, k\u00fdm sa v\u00fdstupn\u00e9 lo\u017eisko nepodarilo. Anal\u00fdza poruchy neodhalila \u017eiadne po\u0161kodenie zubov ozuben\u00e9ho kolesa \u2013 zuby boli vo vynikaj\u00facom stave. Hlavnou pr\u00ed\u010dinou bolo radi\u00e1lne za\u0165a\u017eenie re\u0165aze: nap\u00e4tie re\u0165aze na tesnej strane bolo 9 200 N, \u010do vytv\u00e1ralo radi\u00e1lne za\u0165a\u017eenie pribli\u017ene 13 800 N v strede v\u00fdstupn\u00e9ho hriade\u013ea. Vybran\u00fd 100 mm p\u00e1r mal v\u00fdstupn\u00e9 radi\u00e1lne za\u0165a\u017eenie iba 8 500 N. Lo\u017eisko pracovalo 11 mesiacov na 162 percent\u00e1ch svojej menovitej radi\u00e1lnej kapacity. N\u00e1hradn\u00e1 \u0161pecifik\u00e1cia sa zmenila na p\u00e1r s rozostupom os\u00ed 125 mm (radi\u00e1lna nosnos\u0165 15 000 N) s cenovou prir\u00e1\u017ekou 280 USD \u2013 rozhodnutie, ktor\u00e9 malo by\u0165 prijat\u00e9 v p\u00f4vodnej f\u00e1ze \u0161pecifik\u00e1cie. Ponau\u010denie pre obstar\u00e1vanie z\u00e1vitovkov\u00e9ho prevodu kore\u010dkov\u00e9ho elev\u00e1tora: v\u017edy overte radi\u00e1lnu \u00fanosnos\u0165 vo\u010di nap\u00e4tiu re\u0165aze, nielen kr\u00fatiaci moment vo\u010di zdv\u00edhacej sile. Tieto dve kontroly s\u00fa nez\u00e1visl\u00e9 a ktor\u00e1ko\u013evek z nich m\u00f4\u017ee by\u0165 z\u00e1v\u00e4zn\u00fdm obmedzen\u00edm.<\/p>\n<\/div>\n

<\/p>\n

\u0160pecifik\u00e1cia materi\u00e1lu a tesnenia pod\u013ea dopravovan\u00e9ho materi\u00e1lu<\/h2>\n
\n
\"Detail<\/div>\n
\n

Kor\u010dekov\u00e9 elev\u00e1tory manipuluj\u00fa s tromi \u0161irok\u00fdmi kateg\u00f3riami sypk\u00e9ho materi\u00e1lu, pri\u010dom ka\u017ed\u00e1 z nich kladie odli\u0161n\u00e9 environment\u00e1lne po\u017eiadavky na z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r. Dopravovan\u00fd materi\u00e1l ur\u010duje nielen po\u017eadovan\u00fd kr\u00fatiaci moment, ale aj metalurgiu, tesnenie a v niektor\u00fdch pr\u00edpadoch aj s\u00falad ozuben\u00e9ho pohonu s legislat\u00edvou.<\/p>\n

Spr\u00e1vne p\u00e1rovanie materi\u00e1lov v \u010dase \u0161pecifik\u00e1cie zabra\u0148uje najdrah\u0161iemu typu poruchy \u2013 kor\u00f3zii alebo po\u0161kodeniu kontamin\u00e1ciou, ktor\u00e9 s\u00fa\u010dasne zni\u010d\u00ed z\u00e1vitovku aj koleso, \u010do si vy\u017eaduje v\u00fdmenu cel\u00e9ho p\u00e1ru namiesto iba kolesa.<\/p>\n<\/div>\n<\/div>\n

\n
\n
Obilniny a potravin\u00e1rske komodity<\/div>\n

\u010cerv:<\/strong> \u0160tandardn\u00e1 kalen\u00e1 oce\u013e, utesnen\u00e9 puzdro.
\nKoleso:<\/strong> Fosforov\u00fd bronz CuSn12Ni.
\nTesnenie:<\/strong> Dvojit\u00e9 tesnenie s perom + labyrint, pozit\u00edvny vn\u00fatorn\u00fd tlak (vyl\u00fa\u010denie prachu).
\n\u0160peci\u00e1lne:<\/strong> Certifik\u00e1cia ATEX Z\u00f3na 21\/22 sa vy\u017eaduje, ak koncentr\u00e1cia zrnit\u00e9ho prachu prekro\u010d\u00ed LEL (doln\u00fa medzu v\u00fdbu\u0161nosti). Kryt mus\u00ed by\u0165 neiskriaci alebo certifikovan\u00fd pre dan\u00fa z\u00f3nu. Mazivo potravin\u00e1rskej kvality (minim\u00e1lne NSF H2) pre ak\u00fdko\u013evek v\u00fd\u0165ah nap\u00e1jaj\u00faci potraviny ur\u010den\u00e9 na spracovanie \u013eudskej stravy.<\/p>\n<\/div>\n

\n
Chemick\u00fd pr\u00e1\u0161ok a hnojivo<\/div>\n

\u010cerv:<\/strong> Pozinkovan\u00e1 alebo nehrdzavej\u00faca oce\u013e (AISI 304 pre mierne chemik\u00e1lie, 316L pre chloridy\/kyseliny).
\nKoleso:<\/strong> Hlin\u00edkov\u00fd bronz CuAl10Fe5Ni5 (odoln\u00fd vo\u010di kor\u00f3zii, bez odzinkovanie).
\nTesnenie:<\/strong> Tesnenie z PTFE pery + pretlakov\u00fd labyrint (vyl\u00fa\u010denie chemick\u00fdch p\u00e1r).
\n\u0160peci\u00e1lne:<\/strong> Overte kompatibilitu maziva s chemick\u00fdmi v\u00fdparmi \u2013 niektor\u00e9 odpadov\u00e9 plyny z hnoj\u00edv (amoniak, H\u2082S) r\u00fdchlo degraduj\u00fa \u0161tandardn\u00fd miner\u00e1lny olej.<\/p>\n<\/div>\n

\n
Cementov\u00fd slinok a kamenivo<\/div>\n

\u010cerv:<\/strong> Prekalen\u00e1 oce\u013e 42CrMo4 (odoln\u00e1 vo\u010di n\u00e1razu, HRC 28-34).
\nKoleso:<\/strong> Fosforov\u00fd bronz liaty odstredivo (hustej\u0161ia mikro\u0161trukt\u00fara, vynikaj\u00faca odolnos\u0165 proti opotrebovaniu).
\nTesnenie:<\/strong> Trojit\u00fd labyrintov\u00fd + odvzdu\u0161\u0148ovac\u00ed filter (extr\u00e9mny prach, teplotn\u00e9 cykly).
\n\u0160peci\u00e1lne:<\/strong> Chladenie n\u00faten\u00fdm vzduchom alebo kryt s ventil\u00e1torom pre nepretr\u017eit\u00fa prev\u00e1dzku nad 5 kW. Cementov\u00fd prach je z\u00e1sadit\u00fd a hygroskopick\u00fd \u2013 preniknutie do krytu prevodovky emulguje mazivo v priebehu nieko\u013ek\u00fdch t\u00fd\u017ed\u0148ov.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\u0160pecifik\u00e1cie p\u00e1rov z\u00e1vitovkov\u00fdch prevodov s tromi kore\u010dkov\u00fdmi v\u00fd\u0165ahmi<\/h2>\n

\"Pou\u017eitie<\/p>\n

Pr\u00edpad 1 \u2013 K\u00f3rejsk\u00e9 obiln\u00e9 silo: ry\u017eov\u00fd elev\u00e1tor s v\u00fdkonom 35 t\/h s po\u017eiadavkou ATEX<\/h3>\n

K\u00f3rejsk\u00e9 po\u013enohospod\u00e1rske dru\u017estvo \u0161pecifikovalo p\u00e1ry z\u00e1vitovkov\u00fdch prevodov pre \u0161es\u0165 20-metrov\u00fdch kore\u010dkov\u00fdch elev\u00e1torov, ktor\u00e9 prij\u00edmaj\u00fa ry\u017eov\u00e9 polia z n\u00e1kladn\u00e9ho auta na vrchol sila. Kapacita 35 ton za hodinu na elev\u00e1tor. Rozstup lopaty 350 mm, objem lopaty 8 litrov, r\u00fdchlos\u0165 p\u00e1su 1,8 m\/s. Ust\u00e1len\u00fd zdv\u00edhac\u00ed kr\u00fatiaci moment: 280 N\u00b7m. Faktor r\u00e1zov\u00e9ho prep\u00e4tia pri plnen\u00ed f\u00e1zy 1: 1,5\u00d7. Faktor rozbehu so za\u0165a\u017een\u00fdm p\u00e1som: 2,5\u00d7. Prev\u00e1dzkov\u00fd faktor pre mierny n\u00e1raz: 1,5. Kr\u00fatiaci moment v najhor\u0161om pr\u00edpade: 280 \u00d7 2,5 \u00d7 1,5 = 1 050 N\u00b7m. Radi\u00e1lne za\u0165a\u017eenie reme\u0148a na v\u00fdstupnom hriadeli: 7 200 N. \u0160pecifik\u00e1cia: p\u00e1r z\u00e1vitovkov\u00fdch prevodov s jedn\u00fdm chodom, modul 5, rozostup 125 mm, prevodov\u00fd pomer 40:1, q = 10, uhol n\u00e1behu 5,7 stup\u0148a. Menovit\u00fd kr\u00fatiaci moment 1 200 N\u00b7m, v\u00fdstupn\u00fd radi\u00e1lny moment 12 000 N \u2013 obe v r\u00e1mci tolerancie. Materi\u00e1l: \u0161tandardn\u00fd cementovan\u00fd z\u00e1vitovkov\u00fd dopravn\u00edk, koleso z fosforov\u00e9ho bronzu, utesnen\u00e9 mazacie puzdro. Vy\u017eaduje sa certifik\u00e1cia ATEX Zone 22 (zrnn\u00fd prach v okolitej atmosf\u00e9re, hoci je prevodovka utesnen\u00e1). Mazivo NSF H2 je \u0161pecifikovan\u00e9, preto\u017ee elev\u00e1tor z\u00e1sobuje linku na spracovanie ry\u017ee ur\u010den\u00fa na \u013eudsk\u00fa spotrebu. Odhadovan\u00e1 \u017eivotnos\u0165: 6 a\u017e 8 rokov pri dvojzmennej prev\u00e1dzke (4 800 h\/rok). N\u00e1klady na p\u00e1r: 520 USD. Servis v ter\u00e9ne na 6 elev\u00e1toroch po\u010das 4 rokov: \u017eiadne poruchy, \u017eiadne pr\u00edpady sp\u00e4tn\u00e9ho chodu, hluk nameran\u00fd na \u00farovni 68 dB(A) vo vzdialenosti 1 meter.<\/p>\n

Pr\u00edpad 2 \u2013 Japonsk\u00fd chemick\u00fd z\u00e1vod: Elev\u00e1tor hnoj\u00edv s v\u00fdkonom 60 t\/h s ochranou proti kor\u00f3zii<\/h3>\n

Japonsk\u00fd v\u00fdrobca hnoj\u00edv \u0161pecifikoval p\u00e1ry z\u00e1vitovkov\u00fdch prevodov pre dva 30-metrov\u00e9 kore\u010dkov\u00e9 elev\u00e1tory manipuluj\u00face s granulovan\u00fdm s\u00edranom am\u00f3nnym. Chemick\u00e9 prostredie predstavovalo hlavn\u00fa v\u00fdzvu: koncentr\u00e1cia p\u00e1r amoniaku okolo p\u00e4ty elev\u00e1tora bola dostato\u010dn\u00e1 na to, aby sp\u00f4sobila kor\u00f3ziu \u0161tandardnej uhl\u00edkovej ocele v priebehu 6 mesiacov. Ust\u00e1len\u00fd zdv\u00edhac\u00ed kr\u00fatiaci moment: 680 N\u00b7m. Prudk\u00fd n\u00e1beh f\u00e1zy 1: 1,6\u00d7. Faktor rozbehu: 2,0. SF: 2,0. Kr\u00fatiaci moment v najhor\u0161om pr\u00edpade: 680 \u00d7 2,0 \u00d7 2,0 = 2 720 N\u00b7m. Radi\u00e1lne za\u0165a\u017eenie re\u0165aze: 22 000 N. \u0160pecifik\u00e1cia: p\u00e1r z\u00e1vitovkov\u00fdch prevodov s jedn\u00fdm chodom, modul 8, rozostup 200 mm, prevodov\u00fd pomer 50:1. Z\u00e1vitovka: nehrdzavej\u00faca oce\u013e AISI 304 (odoln\u00e1 vo\u010di amoniaku). Koleso: hlin\u00edkov\u00fd bronz CuAl10Fe5Ni5 (bez odzinkovania v amoniakovej atmosf\u00e9re). Tesnenie: PTFE tesnenie s tlakov\u00fdm labyrintom \u2013 kladn\u00fd vn\u00fatorn\u00fd tlak vzduchu zabra\u0148uje vniknutiu p\u00e1r amoniaku. Mazivo: syntetick\u00fd PAG s antikor\u00f3znym bal\u00edkom pr\u00edsad overenou kompatibilitou so stopami amoniaku. Pr\u00edplatok za materi\u00e1l oproti \u0161tandardn\u00e9mu oce\u013eovo-bronzov\u00e9mu p\u00e1ru: 1 400 USD za p\u00e1r (pribli\u017ene o 45 percent viac ako \u0161tandard). Predpokladan\u00e1 \u017eivotnos\u0165: 5 a\u017e 7 rokov v amoniakovom prostred\u00ed oproti odhadovan\u00fdm 8 a\u017e 14 mesiacom pri \u0161tandardnom oce\u013eovo-bronzovom p\u00e1re. Pr\u00edplatok za materi\u00e1l vo v\u00fd\u0161ke 1 400 USD sa vr\u00e1ti v priebehu prv\u00e9ho roka v\u010faka tomu, \u017ee sa nevy\u017eaduje v\u00fdmena. Prehliada\u0165 \u0161nekov\u00e1 prevodovka pre v\u00fd\u0165ah<\/a> mo\u017enosti, ktor\u00e9 zah\u0155\u0148aj\u00fa kombin\u00e1cie materi\u00e1lov odoln\u00fdch vo\u010di kor\u00f3zii pre kore\u010dkov\u00e9 elev\u00e1tory odoln\u00e9 vo\u010di chemik\u00e1li\u00e1m.<\/p>\n

Pr\u00edpad 3 \u2013 Vietnamsk\u00e1 cement\u00e1re\u0148: Elev\u00e1tor slinku s v\u00fdkonom 120 t\/h s tepeln\u00fdm riaden\u00edm<\/h3>\n

Vietnamsk\u00fd v\u00fdrobca cementu \u0161pecifikoval p\u00e1ry z\u00e1vitovkov\u00fdch prevodov pre 35-metrov\u00fd kore\u010dkov\u00fd elev\u00e1tor zdv\u00edhaj\u00faci hor\u00faci cementov\u00fd slinok (teplota materi\u00e1lu 80 a\u017e 120 stup\u0148ov Celzia) z v\u00fdpustu chladi\u010da do sila na slinok. Tepeln\u00e1 v\u00fdzva bola dvojak\u00e1: vysok\u00e1 teplota materi\u00e1lu vy\u017earovala teplo do krytu elev\u00e1tora a nepretr\u017eit\u00e1 prev\u00e1dzka v n\u00e1ro\u010dn\u00fdch podmienkach generovala zna\u010dn\u00e9 trecie teplo v p\u00e1re z\u00e1vitovkov\u00fdch prevodov s jednorazovou \u00fa\u010dinnos\u0165ou pribli\u017ene 42 percent. Ust\u00e1len\u00fd zdv\u00edhac\u00ed kr\u00fatiaci moment: 1 800 N\u00b7m. Prudk\u00fd n\u00e1rast vo f\u00e1ze 1: 1,8\u00d7. Spustenie so zhutnen\u00fdm slinkom: 3,0\u00d7. SF: 2,5. Kr\u00fatiaci moment v najhor\u0161om pr\u00edpade: 1 800 \u00d7 3,0 \u00d7 2,5 = 13 500 N\u00b7m. Po\u017eiadavka 13,5 kN\u00b7m prekro\u010dila kapacitu jedn\u00e9ho p\u00e1ru z\u00e1vitovkov\u00fdch kolies pri \u0161tandardn\u00fdch rozstupoch os\u00ed \u2013 \u0161pecifik\u00e1cia bola vyrie\u0161en\u00e1 pou\u017eit\u00edm dvojstup\u0148ovej redukcie: prim\u00e1rny p\u00e1r z\u00e1vitovkov\u00fdch kolies s rozstupom os\u00ed 250 mm (menovit\u00fd kr\u00fatiaci moment 8 000 N\u00b7m, prevodov\u00fd pomer 25:1) so sekund\u00e1rnym re\u0165azov\u00fdm reduk\u010dn\u00fdm stup\u0148om (3:1), ktor\u00fd zabezpe\u010doval zost\u00e1vaj\u00faci prevodov\u00fd pomer. Celkov\u00fd prevod: 75:1. P\u00e1r z\u00e1vitovkov\u00fdch kolies niesol efekt\u00edvny kr\u00fatiaci moment 4 500 N\u00b7m \u2013 \u010do je v r\u00e1mci menovit\u00e9ho momentu 8 000 N\u00b7m. Z\u00e1vitovka: kalen\u00e1 oce\u013e 42CrMo4. Koleso: odstredivo liaty fosforov\u00fd bronz. Chladenie: ventil\u00e1tor s n\u00faten\u00fdm obehom vzduchu namontovan\u00fd priamo na telese z\u00e1vitovkov\u00e9ho kolesa. Teplota telesa stabilizovan\u00e1 na 82 stup\u0148och Celzia \u2013 v r\u00e1mci limitu 90 stup\u0148ov vysokoteplotn\u00e9ho syntetick\u00e9ho maziva. Trojit\u00e9 labyrintov\u00e9 tesnenia s odvzdu\u0161\u0148ovac\u00edm filtrom zabr\u00e1nili vniknutiu cementov\u00e9ho prachu. \u017divotnos\u0165 pri trojzmennej nepretr\u017eitej prev\u00e1dzke: 3 a\u017e 4 roky na koleso (z\u00e1vitovka pre\u017eije dve v\u00fdmeny kolesa).<\/p>\n

<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
\n
\nOt\u00e1zka: M\u00f4\u017ee z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r kore\u010dkov\u00e9ho elev\u00e1tora niekedy pou\u017ei\u0165 dvojchodov\u00fd z\u00e1vitovkov\u00fd prevod pre lep\u0161iu \u00fa\u010dinnos\u0165?<\/summary>\n

Teoreticky by 2-chodov\u00fd p\u00e1r so samostatn\u00fdm zadr\u017eiavac\u00edm zariaden\u00edm (sp\u00e4tn\u00fdm dorazom) na v\u00fdstupnom hriadeli mohol zabezpe\u010di\u0165 \u00fa\u010dinnos\u0165 aj ochranu pred sp\u00e4tn\u00fdm chodom. V praxi sa t\u00e1to konfigur\u00e1cia zriedka pou\u017e\u00edva pre kore\u010dkov\u00e9 elev\u00e1tory, preto\u017ee sp\u00e4tn\u00fd doraz zvy\u0161uje zlo\u017eitos\u0165, n\u00e1klady a potenci\u00e1lny bod jedinej poruchy, ktor\u00e9mu sa samosvorn\u00fd jednochodov\u00fd p\u00e1r vyh\u00fdba. Zn\u00ed\u017eenie \u00fa\u010dinnosti jednochodov\u00e9ho p\u00e1ru (zvy\u010dajne o 15 a\u017e 30 percentu\u00e1lnych bodov menej ako pri 2-chodovom) sa akceptuje ako poistn\u00e9 za inherentn\u00e9 mechanick\u00e9 samosvorenie bez dodato\u010dn\u00fdch komponentov. Nieko\u013eko zariaden\u00ed, ktor\u00e9 pou\u017e\u00edvaj\u00fa 2-chodov\u00e9 p\u00e1ry so sp\u00e4tn\u00fdmi dorazmi, s\u00fa zvy\u010dajne ve\u013emi kapacitn\u00e9 cementov\u00e9 elev\u00e1tory, kde \u00faspora energie od\u00f4vod\u0148uje zv\u00fd\u0161en\u00fa mechanick\u00fa zlo\u017eitos\u0165 a t\u00edm \u00fadr\u017eby m\u00e1 odborn\u00e9 znalosti na pravideln\u00fa kontrolu sp\u00e4tn\u00e9ho dorazu.<\/p>\n<\/details>\n

\nOt\u00e1zka: Ako ovplyv\u0148uje typ re\u0165aze kore\u010dkov\u00e9ho elev\u00e1tora (val\u010dekov\u00e1 re\u0165az vs. odstrediv\u00fd reme\u0148) \u0161pecifik\u00e1ciu z\u00e1vitovkov\u00e9ho prevodu?<\/summary>\n

Val\u010dekov\u00e9 re\u0165azov\u00e9 elev\u00e1tory vytv\u00e1raj\u00fa vy\u0161\u0161ie radi\u00e1lne za\u0165a\u017eenie na v\u00fdstupnom hriadeli ako p\u00e1sov\u00e9 elev\u00e1tory, preto\u017ee re\u0165aze s\u00fa na jednotku d\u013a\u017eky \u0165a\u017e\u0161ie a be\u017eia pri ni\u017e\u0161\u00edch r\u00fdchlostiach (\u010do vy\u017eaduje vy\u0161\u0161\u00ed kr\u00fatiaci moment). Re\u0165azov\u00e9 elev\u00e1tory tie\u017e vytv\u00e1raj\u00fa v\u00fdraznej\u0161ie plniace r\u00e1zy f\u00e1zy 1, preto\u017ee rozostup vedier je \u0161ir\u0161\u00ed a ka\u017ed\u00e9 vedro sa pln\u00ed n\u00e1hle. P\u00e1sov\u00e9 elev\u00e1tory be\u017eia r\u00fdchlej\u0161ie (zvy\u010dajne 2 a\u017e 4 m\/s oproti 1 a\u017e 2 m\/s pre re\u0165azov\u00e9), maj\u00fa plynulej\u0161ie plnenie a vytv\u00e1raj\u00fa ni\u017e\u0161ie radi\u00e1lne za\u0165a\u017eenie. Z\u00e1vitovkov\u00fd prevodov\u00fd p\u00e1r pre re\u0165azov\u00fd elev\u00e1tor by mal by\u0165 o jeden r\u00e1m v\u00e4\u010d\u0161\u00ed ako p\u00e1sov\u00fd elev\u00e1tor s rovnakou priepustnos\u0165ou \u2013 re\u0165azov\u00fd elev\u00e1tor s v\u00fdkonom 100 ton za hodinu zvy\u010dajne potrebuje prevodov\u00fd p\u00e1r s rozostupom 200 mm, zatia\u013e \u010do ekvivalentn\u00fd p\u00e1sov\u00fd elev\u00e1tor m\u00f4\u017ee pou\u017ei\u0165 160 mm.<\/p>\n<\/details>\n

\nOt\u00e1zka: Ak\u00e1 je o\u010dak\u00e1van\u00e1 \u017eivotnos\u0165 z\u00e1vitovkov\u00e9ho prevodov\u00e9ho p\u00e1ru na kore\u010dkovom elev\u00e1tore?<\/summary>\n

Pri spr\u00e1vne \u0161pecifikovanom p\u00e1re s primeran\u00fdm prev\u00e1dzkov\u00fdm faktorom vydr\u017e\u00ed bronzov\u00e9 koleso typicky 4 a\u017e 8 rokov pri jednozmennej prev\u00e1dzke (2 500 hod\u00edn ro\u010dne), 2,5 a\u017e 5 rokov pri dvojzmennej prev\u00e1dzke (5 000 hod\u00edn ro\u010dne) a 1,5 a\u017e 3,5 roka pri trojzmennej nepretr\u017eitej prev\u00e1dzke (7 500 hod\u00edn ro\u010dne). Oce\u013eov\u00fd z\u00e1vitovkov\u00fd dopravn\u00edk zvy\u010dajne vydr\u017e\u00ed dlh\u0161ie ako 2 a\u017e 3 v\u00fdmeny kolies, preto\u017ee tvrd\u0161\u00ed oce\u013eov\u00fd povrch sa v porovnan\u00ed s m\u00e4k\u0161\u00edm bronzom neopotrebov\u00e1va merate\u013ene. V\u00f4\u013eu treba sledova\u0165 ka\u017edoro\u010dne \u2013 ke\u010f v\u00f4\u013ea dosiahne 1,5-n\u00e1sobok hodnoty uvedenej v dodacom liste, napl\u00e1nujte v\u00fdmenu kolesa v nasleduj\u00facom obdob\u00ed \u00fadr\u017eby. Hlavn\u00fdm faktorom obmedzuj\u00facim \u017eivotnos\u0165 je nepretr\u017eit\u00e9 cyklick\u00e9 za\u0165a\u017eenie zo \u0161tvorf\u00e1zov\u00e9ho cyklu kr\u00fatiaceho momentu, ktor\u00e9 akumuluje kontaktn\u00fa \u00fanavu na bokoch zubov bronzov\u00e9ho kolesa r\u00fdchlej\u0161ie ako pri ust\u00e1len\u00fdch aplik\u00e1ci\u00e1ch dopravn\u00edka.<\/p>\n<\/details>\n

\nOt\u00e1zka: Potrebujem certifik\u00e1ciu ATEX na p\u00e1r z\u00e1vitovkov\u00fdch prevodov pre kore\u010dkov\u00fd elev\u00e1tor na obilie?<\/summary>\n

Ak sa teleso z\u00e1vitovkov\u00e9ho prevodov\u00e9ho p\u00e1ru nach\u00e1dza v oblasti klasifikovanej ako ATEX z\u00f3na 21 (pravdepodobn\u00fd oblak prachu po\u010das norm\u00e1lnej prev\u00e1dzky) alebo z\u00f3na 22 (mo\u017en\u00fd oblak prachu po\u010das abnorm\u00e1lnej prev\u00e1dzky), teleso mus\u00ed sp\u013a\u0148a\u0165 pr\u00edslu\u0161n\u00fa kateg\u00f3riu zariadenia ATEX. V praxi je v\u00e4\u010d\u0161ina z\u00e1vitovkov\u00fdch prevodov\u00fdch p\u00e1rov kore\u010dkov\u00fdch elev\u00e1torov utesnen\u00e1 a nem\u00e1 \u017eiadny vn\u00fatorn\u00fd zdroj zap\u00e1lenia (\u017eiadne elektrick\u00e9 komponenty, \u017eiadne iskrenie), tak\u017ee zvy\u010dajne sp\u013a\u0148aj\u00fa po\u017eiadavky z\u00f3ny 22 bez \u00faprav. Z\u00f3na 21 m\u00f4\u017ee vy\u017eadova\u0165 dodato\u010dn\u00fa certifika\u010dn\u00fa dokument\u00e1ciu alebo overenie teploty povrchu telesa (teplota telesa mus\u00ed zosta\u0165 pod teplotou samovznietenia prachu, ktor\u00e1 je pre zrnit\u00fd prach typicky 400 a\u017e 500 stup\u0148ov Celzia \u2013 \u010do je v\u00fdrazne nad be\u017en\u00fdmi prev\u00e1dzkov\u00fdmi teplotami). \u00dadaje o teplote telesa prevodov\u00e9ho p\u00e1ru z technick\u00e9ho listu v\u00e1m poskytne v\u00e1\u0161 posudzovate\u013e ATEX.<\/p>\n<\/details>\n

\nOt\u00e1zka: Ako zabr\u00e1nim vniknutiu cementov\u00e9ho prachu do skrine z\u00e1vitovkov\u00e9ho prevodu na slinkovom elev\u00e1tore?<\/summary>\n

Tri vrstvy ochrany. Po prv\u00e9, trojit\u00e9 labyrintov\u00e9 tesnenia na vstupnom aj v\u00fdstupnom hriadeli \u2013 labyrinty vytv\u00e1raj\u00fa k\u013eukat\u00fa dr\u00e1hu, po ktorej odstrediv\u00e1 sila a gravit\u00e1cia br\u00e1nia jemn\u00fdm \u010dasticiam v pohybe. Po druh\u00e9, odvzdu\u0161\u0148ovac\u00ed filter so spekan\u00fdm bronzov\u00fdm alebo plsten\u00fdm prvkom, ktor\u00fd umo\u017e\u0148uje vzduchu rozp\u00edna\u0165 sa a s\u0165ahova\u0165 v z\u00e1vislosti od teplotn\u00fdch cyklov (zmeny denn\u00e9ho a no\u010dn\u00e9ho okolia m\u00f4\u017eu vytvori\u0165 podtlak vo vn\u00fatri krytu, ktor\u00fd nas\u00e1va prach okolo tesniacich pier), pri\u010dom blokuje \u010dastice. Po tretie, kladn\u00fd vn\u00fatorn\u00fd tlak \u2013 niektor\u00e9 in\u0161tal\u00e1cie pou\u017e\u00edvaj\u00fa mal\u00e9 kontinu\u00e1lne preplachovanie vzduchom (0,5 a\u017e 1 liter filtrovan\u00e9ho stla\u010den\u00e9ho vzduchu za min\u00fatu) vstrekovan\u00e9 do krytu na udr\u017eanie mierneho kladn\u00e9ho tlaku, \u010d\u00edm sa zabr\u00e1ni vniknutiu prachom za\u0165a\u017een\u00e9ho okolit\u00e9ho vzduchu. Trojit\u00fd pr\u00edstup predl\u017euje \u017eivotnos\u0165 tesnenia zo 6 na 12 mesiacov (jednostrann\u00e9 tesnenie v cemente) na 3 a\u017e 5 rokov (trojit\u00fd labyrint + odvzdu\u0161\u0148ovac\u00ed filter + tlak).<\/p>\n<\/details>\n<\/div>\n

<\/p>\n

Kor\u010dekov\u00e9 elev\u00e1tory predstavuj\u00fa najn\u00e1ro\u010dnej\u0161iu vertik\u00e1lnu dopravn\u00fa aplik\u00e1ciu pre p\u00e1ry z\u00e1vitovkov\u00fdch prevodov \u2013 kombinuj\u00fa absol\u00fatnu po\u017eiadavku na samosvorn\u00fa ochranu pred sp\u00e4tn\u00fdm chodom s cyklick\u00fdm profilom kr\u00fatiaceho momentu, ktor\u00fd dosahuje vrchol 1,3 a\u017e 1,8-n\u00e1sobku ust\u00e1len\u00e9ho stavu po\u010das plnenia, sp\u00fa\u0161\u0165ac\u00ed kr\u00fatiaci moment, ktor\u00fd dosahuje 2,0 a\u017e 3,0-n\u00e1sobok ust\u00e1len\u00e9ho stavu so za\u0165a\u017eenou re\u0165azou, a radi\u00e1lne za\u0165a\u017eenie re\u0165aze nap\u00e4t\u00edm, ktor\u00e9 m\u00f4\u017ee v\u00fdrazne prekro\u010di\u0165 dimenzovanie riaden\u00e9 kr\u00fatiacim momentom. \u0160pecifik\u00e1cia p\u00e1ru z\u00e1vitovkov\u00fdch prevodov kor\u010dekov\u00e9ho elev\u00e1tora len na z\u00e1klade zdv\u00edhacieho kr\u00fatiaceho momentu v ust\u00e1lenom stave \u2013 najbe\u017enej\u0161ia skratka \u2013 vynech\u00e1va plniaci n\u00e1rast, sp\u00fa\u0161\u0165ac\u00ed multiplik\u00e1tor a kontrolu radi\u00e1lneho za\u0165a\u017eenia, pri\u010dom ktor\u00fdko\u013evek z nich m\u00f4\u017ee by\u0165 z\u00e1v\u00e4zn\u00fdm obmedzen\u00edm. \u0160tvorf\u00e1zov\u00fd cyklus kr\u00fatiaceho momentu je z\u00e1kladom dimenzovania, sklon je v\u017edy takmer vertik\u00e1lny (je povinn\u00fd jeden \u0161tart) a materi\u00e1lov\u00e9 prostredie ur\u010duje metalurgick\u00fd a tesniaci bal\u00edk. K\u00f3rejsk\u00ed, japonsk\u00ed a vietnamsk\u00ed v\u00fdrobcovia origin\u00e1lnych dielov (OEM) sl\u00fa\u017eiaci obiln\u00e9mu, chemick\u00e9mu a cement\u00e1rskemu priemyslu sa be\u017ene stret\u00e1vaj\u00fa so v\u0161etk\u00fdmi tromi kateg\u00f3riami materi\u00e1lov v jednom zariaden\u00ed \u2013 a \u0161pecifik\u00e1cia p\u00e1ru z\u00e1vitovkov\u00fdch prevodov mus\u00ed zodpoveda\u0165 ka\u017ed\u00e9mu elev\u00e1toru individu\u00e1lne.<\/p>\n

Pre kon\u0161truk\u010dn\u00e9 a obstar\u00e1vacie t\u00edmy, ktor\u00e9 \u0161pecifikuj\u00fa p\u00e1ry z\u00e1vitovkov\u00fdch prevodov pre kore\u010dkov\u00e9 elev\u00e1tory, na\u0161a technick\u00e1 linka vykon\u00e1 \u0161tvorf\u00e1zov\u00fa anal\u00fdzu kr\u00fatiaceho momentu a kontrolu radi\u00e1lneho za\u0165a\u017eenia re\u0165aze v porovnan\u00ed s parametrami v\u00e1\u0161ho elev\u00e1tora. \u0160tandardn\u00fd katal\u00f3g z\u00e1vitovkov\u00e9 prevody z fosforov\u00e9ho bronzu<\/a> Pokr\u00fdvaj\u00fa rozostupy od 80 do 250 mm v konfigur\u00e1ci\u00e1ch s jedn\u00fdm chodom s kompletnou dokument\u00e1ciou DIN. K dispoz\u00edcii s\u00fa aj z\u00e1kazkov\u00e9 kombin\u00e1cie materi\u00e1lov (nehrdzavej\u00faca oce\u013e, hlin\u00edkov\u00fd bronz, odstrediv\u00e9 liatie) a kryty kompatibiln\u00e9 s ATEX s dodacou lehotou 4 a\u017e 6 t\u00fd\u017ed\u0148ov \u2013 odo\u0161lite \u017eiados\u0165 \u0161pecifik\u00e1cia pohonu kore\u010dkov\u00e9ho v\u00fd\u0165ahu<\/a> s \u00fadajmi o napnut\u00ed re\u0165aze a n\u00e1\u0161 t\u00edm v\u00e1m do jedn\u00e9ho pracovn\u00e9ho d\u0148a vr\u00e1ti odpor\u00fa\u010danie.<\/p>\n

<\/p>\n

\n

Dimenzovanie z\u00e1vitovkov\u00e9ho prevodov\u00e9ho p\u00e1ru pre pohon kore\u010dkov\u00e9ho elev\u00e1tora?<\/h3>\n

Po\u0161lite n\u00e1m v\u00fd\u0161ku zdvihu v\u00fd\u0165ahu, kapacitu (t\/h), ve\u013ekos\u0165 vedra, typ re\u0165aze alebo reme\u0148a, dopravovan\u00fd materi\u00e1l a ak\u00e9ko\u013evek environment\u00e1lne obmedzenia (ATEX, chemik\u00e1lie, vysok\u00e1 teplota). Vykon\u00e1me \u0161tvorf\u00e1zov\u00fa anal\u00fdzu kr\u00fatiaceho momentu, skontrolujeme radi\u00e1lnu \u00fanosnos\u0165 a odporu\u010d\u00edme spr\u00e1vne p\u00e1rovanie materi\u00e1lov \u2013 zvy\u010dajne do jedn\u00e9ho pracovn\u00e9ho d\u0148a.<\/p>\n

Vy\u017eiadajte si \u0161pecifik\u00e1ciu pohonu kore\u010dkov\u00e9ho elev\u00e1tora \u2192<\/a><\/p>\n<\/div>\n

upravi\u0165 pou\u017e\u00edvate\u013eom 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\/sk\/wp-json\/wp\/v2\/posts\/1350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/comments?post=1350"}],"version-history":[{"count":1,"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/posts\/1350\/revisions"}],"predecessor-version":[{"id":1353,"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/posts\/1350\/revisions\/1353"}],"wp:attachment":[{"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/media?parent=1350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/categories?post=1350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/sk\/wp-json\/wp\/v2\/tags?post=1350"}],"curies":[{"name":"pracovn\u00fd list","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}