{"id":1231,"date":"2026-05-20T06:16:23","date_gmt":"2026-05-20T06:16:23","guid":{"rendered":"https:\/\/pto-gearbox.net\/?p=1231"},"modified":"2026-05-20T06:16:23","modified_gmt":"2026-05-20T06:16:23","slug":"gearbox-for-wood-chippers-choosing-the-right-drive","status":"publish","type":"post","link":"https:\/\/pto-gearbox.net\/cs\/gearbox-for-wood-chippers-choosing-the-right-drive\/","title":{"rendered":"P\u0159evodovka pro \u0161t\u011bpkova\u010de: V\u00fdb\u011br spr\u00e1vn\u00e9ho pohonu"},"content":{"rendered":"
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P\u0159evodovka pro \u0161t\u011bpkova\u010de: V\u00fdb\u011br spr\u00e1vn\u00e9ho pohonu<\/h1>\n

Rota\u010dn\u00ed \u0159eza\u010dka klou\u017ee vzrostlou tr\u00e1vou s minim\u00e1ln\u00edmi zm\u011bnami odporu. \u0160t\u011bpkova\u010d naproti tomu \u010del\u00ed okam\u017eit\u00e9mu po\u017eadavku na to\u010div\u00fd moment, kter\u00fd se m\u016f\u017ee v okam\u017eiku, kdy v\u011btev tvrd\u00e9ho d\u0159eva vstoup\u00ed do \u0159ezac\u00edho kotou\u010de, prudce zv\u00fd\u0161it z t\u00e9m\u011b\u0159 nuly na pln\u00e9 zat\u00ed\u017een\u00ed. Tento extr\u00e9mn\u00ed profil zat\u00ed\u017een\u00ed \u010din\u00ed z p\u0159evodovky uvnit\u0159 \u0161t\u011bpkova\u010de jednu z nejv\u00edce nam\u00e1han\u00fdch sou\u010d\u00e1st\u00ed jak\u00e9hokoli n\u00e1\u0159ad\u00ed poh\u00e1n\u011bn\u00e9ho v\u00fdvodov\u00fdm h\u0159\u00eddelem \u2013 a jednu z nejv\u00edce nepochopen\u00fdch, pokud jde o specifikaci a \u00fadr\u017ebu.<\/p>\n

Vy\u017e\u00e1dejte si cenovou nab\u00eddku na p\u0159evodovku \u0161t\u011bpkova\u010de d\u0159eva<\/a><\/p>\n<\/div>\n<\/div>\n

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<\/p>\n

Pro\u010d p\u0159evodovka \u0161t\u011bpkova\u010de \u010del\u00ed jedine\u010dn\u00fdm technick\u00fdm po\u017eadavk\u016fm<\/h2>\n

A p\u0159evodovka pro \u0161t\u011bpkova\u010de d\u0159eva<\/strong> pracuje s profilem zat\u00ed\u017een\u00ed, kter\u00fd se z\u00e1sadn\u011b li\u0161\u00ed od profilu zat\u00ed\u017een\u00ed jak\u00e9hokoli jin\u00e9ho zem\u011bd\u011blsk\u00e9ho nebo lesnick\u00e9ho n\u00e1\u0159ad\u00ed. Zat\u00edmco seka\u010dky, kultiv\u00e1tory a rozmetadla \u010del\u00ed relativn\u011b p\u0159edv\u00eddateln\u00e9mu, cyklick\u00e9mu zat\u00ed\u017een\u00ed, \u0161t\u011bpkova\u010d d\u0159eva \u010del\u00ed p\u0159eru\u0161ovan\u00e9mu, siln\u00e9mu r\u00e1zov\u00e9mu zat\u00ed\u017een\u00ed odd\u011blen\u00e9mu obdob\u00edmi t\u00e9m\u011b\u0159 nulov\u00e9ho zat\u00ed\u017een\u00ed. P\u0159evodovka mus\u00ed p\u0159ej\u00edt z volnob\u011bhu na maxim\u00e1ln\u00ed to\u010div\u00fd moment ve zlomku sekundy poka\u017ed\u00e9, kdy\u017e do \u0159ezac\u00edho mechanismu vstoup\u00ed v\u011btev \u2013 a to mus\u00ed ud\u011blat tis\u00edckr\u00e1t za pracovn\u00ed den bez \u00fanavov\u00e9ho selh\u00e1n\u00ed.<\/p>\n

Povaha d\u0159eva jako materi\u00e1lu tuto v\u00fdzvu je\u0161t\u011b zhor\u0161uje. Zelen\u00e9 tvrd\u00e9 d\u0159evo (dub, javor, o\u0159ech) m\u00e1 smykovou pevnost 8\u201314 MPa nap\u0159\u00ed\u010d vl\u00e1kny. Such\u00e9 tvrd\u00e9 d\u0159evo m\u016f\u017ee p\u0159ekro\u010dit 16 MPa. Kdy\u017e n\u016f\u017e \u0161t\u011bpkova\u010de naraz\u00ed na v\u011btev tvrd\u00e9ho d\u0159eva o pr\u016fm\u011bru 6 palc\u016f (15 cm), okam\u017eit\u00fd pot\u0159ebn\u00fd to\u010div\u00fd moment na \u0159ezn\u00e9m kotou\u010di m\u016f\u017ee dos\u00e1hnout 5\u20138n\u00e1sobku ust\u00e1len\u00e9ho to\u010div\u00e9ho momentu pot\u0159ebn\u00e9ho k \u0161t\u011bpkov\u00e1n\u00ed m\u011bkk\u00fdch k\u0159ovin. Pokud je p\u0159evodovka dimenzov\u00e1na pouze na pr\u016fm\u011brn\u00e9 zat\u00ed\u017een\u00ed, sel\u017ee b\u011bhem n\u011bkolika t\u00fddn\u016f p\u0159i n\u00e1ro\u010dn\u00e9m provozu.<\/p>\n

Tento \u010dl\u00e1nek zkoum\u00e1 stroj\u00edrenstv\u00ed, kter\u00e9 stoj\u00ed za P\u0159evodovka PTO<\/a> syst\u00e9my pou\u017e\u00edvan\u00e9 v \u0161t\u011bpkova\u010d\u00edch d\u0159eva \u2013 zahrnuj\u00edc\u00ed konstrukci r\u00e1zov\u00e9ho zat\u00ed\u017een\u00ed, strategii setrva\u010dn\u00edkov\u00e9ho spojen\u00ed, ochranu proti p\u0159et\u00ed\u017een\u00ed, po\u017eadavky na materi\u00e1l p\u0159evodovky a kritick\u00e9 rozd\u00edly mezi po\u017eadavky na pohon kotou\u010dov\u00e9ho a bubnov\u00e9ho \u0161t\u011bpkova\u010de.<\/p>\n

\"Typy<\/div>\n

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Diskov\u00fd \u0161t\u011bpkova\u010d vs. bubnov\u00fd \u0161t\u011bpkova\u010d: R\u016fzn\u00e9 po\u017eadavky na p\u0159evodovku<\/h2>\n

Dva dominantn\u00ed typy \u0161t\u011bpkova\u010d\u016f d\u0159eva \u2013 kotou\u010dov\u00e9 a bubnov\u00e9 \u2013 vytv\u00e1\u0159ej\u00ed z\u00e1sadn\u011b odli\u0161n\u00e9 profily to\u010div\u00e9ho momentu, kter\u00e9 vy\u017eaduj\u00ed r\u016fzn\u00e9 specifikace p\u0159evodovky. Pochopen\u00ed tohoto rozd\u00edlu je nezbytn\u00e9 pro spr\u00e1vn\u00fd v\u00fdb\u011br p\u0159evodovky.<\/p>\n

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Diskov\u00e9 \u0161t\u011bpkova\u010de<\/p>\n

T\u011b\u017ek\u00fd ocelov\u00fd kotou\u010d (obvykle 60\u201390 kg u model\u016f s pohonem v\u00fdvodov\u00fdm h\u0159\u00eddelem, a\u017e 250 kg u pr\u016fmyslov\u00fdch jednotek poh\u00e1n\u011bn\u00fdch motorem) nese na sv\u00e9m \u010deln\u00edm povrchu 2\u20134 \u0159ezn\u00e9 no\u017ee. Kotou\u010d se ot\u00e1\u010d\u00ed rychlost\u00ed 1 000\u20132 000 ot.\/min a slou\u017e\u00ed jak jako \u0159ezn\u00fd mechanismus, tak jako setrva\u010dn\u00edk energie. D\u0159evo p\u0159iv\u00e1d\u011bn\u00e9 na \u010deln\u00ed plochu kotou\u010de je p\u0159i ka\u017ed\u00e9m pr\u016fchodu no\u017eem \u0159ez\u00e1no na \u0161t\u011bpky.<\/p>\n

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Dopad p\u0159evodovky:<\/strong> Setrva\u010dn\u00edk kotou\u010de ukl\u00e1d\u00e1 kinetickou energii, kter\u00e1 vyrovn\u00e1v\u00e1 po\u017eadavek na to\u010div\u00fd moment. Kdy\u017e kotou\u010d naraz\u00ed na d\u0159evo, kotou\u010d m\u00edrn\u011b zpomal\u00ed a uvoln\u00ed ulo\u017eenou energii, kter\u00e1 napom\u00e1h\u00e1 \u0159ezu. P\u0159evodovka zaznamen\u00e1 chvilkov\u00fd pokles ot\u00e1\u010dek a prudk\u00fd n\u00e1r\u016fst to\u010div\u00e9ho momentu, ale efekt setrva\u010dn\u00edku sni\u017euje pom\u011br \u0161pi\u010dkov\u00e9ho a pr\u016fm\u011brn\u00e9ho to\u010div\u00e9ho momentu na p\u0159ibli\u017en\u011b 2\u20134\u00d7.<\/p>\n<\/div>\n<\/div>\n

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Bubnov\u00e9 \u0161t\u011bpkova\u010de<\/p>\n

V\u00e1lcov\u00fd buben (o pr\u016fm\u011bru 200\u2013350 mm u jednotek s v\u00fdvodov\u00fdm h\u0159\u00eddelem) nese po sv\u00e9m obvodu n\u011bkolik no\u017e\u016f. Buben se ot\u00e1\u010d\u00ed rychlost\u00ed 1 800\u20132 400 ot.\/min s osou \u0159ezu rovnob\u011b\u017enou s p\u0159\u00edsunem d\u0159eva. D\u0159evo je do bubnu pod\u00e1v\u00e1no tangenci\u00e1ln\u011b a ka\u017ed\u00fd n\u016f\u017e odst\u0159ih\u00e1v\u00e1 tenkou t\u0159\u00edsku z povrchu kmene.<\/p>\n

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Dopad p\u0159evodovky:<\/strong> Buben m\u00e1 men\u0161\u00ed hmotnost setrva\u010dn\u00edku ne\u017e kotou\u010d. V\u00edce no\u017e\u016f se do d\u0159eva zapojuje rychle po sob\u011b, co\u017e vytv\u00e1\u0159\u00ed plynulej\u0161\u00ed, ale frekven\u010dn\u011bj\u0161\u00ed vln\u011bn\u00ed to\u010div\u00e9ho momentu. P\u0159evodovka zaznamen\u00e1v\u00e1 m\u00e9n\u011b dramatick\u00e9 jednotliv\u00e9 v\u00fdkyvy, ale vy\u0161\u0161\u00ed trval\u00fd pr\u016fm\u011brn\u00fd to\u010div\u00fd moment. Pom\u011br \u0161pi\u010dky k pr\u016fm\u011bru je ni\u017e\u0161\u00ed (1,5\u20133\u00d7), ale pr\u016fm\u011brn\u00e9 zat\u00ed\u017een\u00ed je vy\u0161\u0161\u00ed a plynuleji se rozv\u00edj\u00ed.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

U kotou\u010dov\u00fdch \u0161t\u011bpkova\u010d\u016f mus\u00ed p\u0159evodovka zvl\u00e1dat vysok\u00e9 p\u0159echodn\u00e9 to\u010div\u00e9 momenty s dostate\u010dnou r\u00e1zovou pevnost\u00ed v zubech ozuben\u00e9ho kola a lo\u017eisk\u00e1ch. U bubnov\u00fdch \u0161t\u011bpkova\u010d\u016f mus\u00ed p\u0159evodovka zvl\u00e1dat vysok\u00fd trval\u00fd to\u010div\u00fd moment s vynikaj\u00edc\u00edm tepeln\u00fdm managementem. Priorita v\u00fdb\u011bru se p\u0159esouv\u00e1 od maxim\u00e1ln\u00ed r\u00e1zov\u00e9 kapacity (kotou\u010d) k trval\u00e9mu v\u00fdkonu a odvodu tepla (buben).<\/p>\n

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Setrva\u010dn\u00edkov\u00e1 spojka: Energetick\u00fd tlumi\u010d mezi p\u0159evodovkou a \u0159eznou hlavou<\/h2>\n

U kotou\u010dov\u00fdch \u0161t\u011bpkova\u010d\u016f slou\u017e\u00ed samotn\u00fd \u0159ezac\u00ed kotou\u010d jako setrva\u010dn\u00edk. U mnoha bubnov\u00fdch \u0161t\u011bpkova\u010d\u016f a n\u011bkter\u00fdch v\u011bt\u0161\u00edch kotou\u010dov\u00fdch \u0161t\u011bpkova\u010d\u016f je v\u0161ak mezi v\u00fdstupem p\u0159evodovky a \u0159ezac\u00edm mechanismem instalov\u00e1n samostatn\u00fd setrva\u010dn\u00edk. Tento setrva\u010dn\u00edk ukl\u00e1d\u00e1 rota\u010dn\u00ed kinetickou energii (E = \u00bdI\u03c9\u00b2, kde I je moment setrva\u010dnosti a \u03c9 je \u00fahlov\u00e1 rychlost), kter\u00e1 dopl\u0148uje v\u00fdstup p\u0159evodovky b\u011bhem \u0161pi\u010dkov\u00e9ho \u0159ezn\u00e9ho zat\u00ed\u017een\u00ed.<\/p>\n

Funkc\u00ed setrva\u010dn\u00edku je odd\u011blit okam\u017eit\u00e9 \u0159ezn\u00e9 zat\u00ed\u017een\u00ed od to\u010div\u00e9ho momentu p\u0159evodovky. Kdy\u017e do \u0161t\u011bpkova\u010de vstoup\u00ed t\u011b\u017ek\u00e1 v\u011btev, setrva\u010dn\u00edk uvoln\u00ed ulo\u017eenou energii pro udr\u017een\u00ed rychlosti \u0159ez\u00e1n\u00ed, zat\u00edmco p\u0159evodovka \u2013 a v kone\u010dn\u00e9m d\u016fsledku i motor traktoru \u2013 postupn\u011b zvy\u0161uje sv\u016fj to\u010div\u00fd moment, aby odpov\u00eddal nov\u00e9mu zat\u00ed\u017een\u00ed. Bez setrva\u010dn\u00edku by se pln\u00e9 n\u00e1razov\u00e9 zat\u00ed\u017een\u00ed okam\u017eit\u011b p\u0159en\u00e1\u0161elo p\u0159es ozuben\u00e9 soukol\u00ed a V\u00fdvodov\u00fd h\u0159\u00eddel<\/a> k traktoru, co\u017e by mohlo v\u00e9st k zastaven\u00ed motoru nebo prasknut\u00ed sou\u010d\u00e1st\u00ed hnac\u00edho \u00fastroj\u00ed.<\/p>\n

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\u2699\ufe0f Flywheel Sizing Considerations<\/p>\n

T\u011b\u017e\u0161\u00ed setrva\u010dn\u00edk ukl\u00e1d\u00e1 v\u00edce energie a poskytuje v\u011bt\u0161\u00ed n\u00e1razn\u00edk proti \u0161pi\u010dk\u00e1m to\u010div\u00e9ho momentu, ale zrychlen\u00ed na provozn\u00ed rychlost b\u011bhem rozb\u011bhu trv\u00e1 d\u00e9le. Nadm\u011brn\u011b t\u011b\u017ek\u00e9 setrva\u010dn\u00edky tak\u00e9 zvy\u0161uj\u00ed nam\u00e1h\u00e1n\u00ed v\u00fdstupn\u00edho lo\u017eiska p\u0159evodovky v d\u016fsledku dodate\u010dn\u00e9 hmotnosti konzolov\u011b vynesen\u00e9 z v\u00fdstupn\u00edho h\u0159\u00eddele. Hmotnost setrva\u010dn\u00edku mus\u00ed b\u00fdt vyv\u00e1\u017eena mezi kapacitou akumulace energie, dobou rozb\u011bhu a zat\u00ed\u017een\u00edm lo\u017eiska. Typick\u00e9 setrva\u010dn\u00edky \u0161t\u011bpkova\u010de s v\u00fdvodov\u00fdm h\u0159\u00eddelem se pohybuj\u00ed od 30 do 120 kg v z\u00e1vislosti na kapacit\u011b \u0161t\u011bpkova\u010de a maxim\u00e1ln\u00edm jmenovit\u00e9m pr\u016fm\u011bru v\u011btve.<\/p>\n<\/div>\n

Spojen\u00ed mezi setrva\u010dn\u00edkem a v\u00fdstupn\u00edm h\u0159\u00eddelem p\u0159evodovky je obvykle tvo\u0159eno ku\u017eelov\u00fdm pouzdrem nebo perem s pojistnou matic\u00ed. Toto spojen\u00ed mus\u00ed zvl\u00e1dat obousm\u011brn\u00e9 zat\u00ed\u017een\u00ed kroutic\u00edm momentem \u2013 setrva\u010dn\u00edk zrychluje p\u0159i lehk\u00e9m zat\u00ed\u017een\u00ed (p\u0159evodovka poh\u00e1n\u00ed setrva\u010dn\u00edk rychleji) a zpomaluje p\u0159i velk\u00e9m zat\u00ed\u017een\u00ed (setrva\u010dn\u00edk poh\u00e1n\u00ed \u0159eznou hlavu pomoc\u00ed akumulovan\u00e9 energie). Voln\u00e9 upevn\u011bn\u00ed setrva\u010dn\u00edku je extr\u00e9mn\u011b nebezpe\u010dn\u00e9 a b\u011bhem n\u011bkolika hodin zni\u010d\u00ed perovou dr\u00e1\u017eku v\u00fdstupn\u00edho h\u0159\u00eddele p\u0159evodovky.<\/p>\n

\"P\u0159ehled<\/div>\n

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Syst\u00e9my ochrany proti st\u0159i\u017en\u00fdm kol\u00edk\u016fm a p\u0159et\u00ed\u017een\u00ed<\/h2>\n

Bez ohledu na to, jak robustn\u011b je p\u0159evodovka navr\u017eena, nastanou situace, kdy zat\u00ed\u017een\u00ed p\u0159ekro\u010d\u00ed kapacitu syst\u00e9mu \u2013 ocelov\u00fd \u0161roub skryt\u00fd uvnit\u0159 kmene, k\u00e1men zakl\u00edn\u011bn\u00fd v p\u0159\u00edvodu, pr\u016fm\u011br v\u011btve p\u0159esahuj\u00edc\u00ed jmenovit\u00e9 hodnoty stroje. Syst\u00e9my ochrany proti p\u0159et\u00ed\u017een\u00ed zabra\u0148uj\u00ed katastrofick\u00e9mu (a drah\u00e9mu) po\u0161kozen\u00ed ozuben\u00e9ho soukol\u00ed t\u00edm, \u017ee zaji\u0161\u0165uj\u00ed kontrolovan\u00fd bod selh\u00e1n\u00ed.<\/p>\n

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St\u0159i\u017en\u00e9 kol\u00edky (mechanick\u00e9 pojistky)<\/p>\n

Kalen\u00fd ocelov\u00fd \u010dep o zn\u00e1m\u00e9m pr\u016f\u0159ezu spojuje v\u00fdstup p\u0159evodovky s n\u00e1bojem setrva\u010dn\u00edku nebo \u0159ezn\u00e9ho kotou\u010de. \u010cep je konstruov\u00e1n tak, aby se st\u0159ihl p\u0159i specifick\u00e9m prahu to\u010div\u00e9ho momentu \u2013 obvykle 150\u2013200% maxim\u00e1ln\u00edho trval\u00e9ho jmenovit\u00e9ho to\u010div\u00e9ho momentu p\u0159evodovky. Kdy\u017e se \u010dep st\u0159ihne, pohon se odpoj\u00ed a \u0159ezn\u00e1 hlava se zastav\u00ed setrva\u010dnost\u00ed na z\u00e1klad\u011b sv\u00e9 akumulovan\u00e9 kinetick\u00e9 energie, zat\u00edmco p\u0159evodovka a hnac\u00ed \u00fastroj\u00ed se okam\u017eit\u011b odleh\u010d\u00ed. St\u0159i\u017en\u00e9 \u010depy stoj\u00ed p\u00e1r hal\u00e9\u0159\u016f a vym\u011bn\u00ed se b\u011bhem n\u011bkolika minut; soukol\u00ed, kter\u00e9 chr\u00e1n\u00ed, stoj\u00ed stovky dolar\u016f a vy\u017eaduje hodiny pr\u00e1ce.<\/p>\n<\/div>\n

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Prokluzovac\u00ed spojka (ochrana zalo\u017een\u00e1 na t\u0159en\u00ed)<\/p>\n

N\u011bkter\u00e9 konstrukce \u0161t\u011bpkova\u010d\u016f pou\u017e\u00edvaj\u00ed mezi v\u00fdstupem p\u0159evodovky a \u0159ezac\u00ed hlavou pru\u017einovou t\u0159ec\u00ed spojku. Spojka prokluzuje, kdy\u017e to\u010div\u00fd moment p\u0159ekro\u010d\u00ed nastaven\u00ed p\u0159edp\u011bt\u00ed pru\u017einy, co\u017e umo\u017e\u0148uje p\u0159evodovce pokra\u010dovat v ot\u00e1\u010den\u00ed, zat\u00edmco \u0159ezac\u00ed hlava zpomaluje. Jakmile p\u0159et\u00ed\u017een\u00ed pomine (zaseknut\u00e1 v\u011btev se zlom\u00ed nebo obsluha couv\u00e1), spojka se automaticky znovu zapne bez nutnosti v\u00fdm\u011bny. Prokluzovac\u00ed spojky jsou dra\u017e\u0161\u00ed ne\u017e st\u0159i\u017en\u00e9 kol\u00edky, ale eliminuj\u00ed prostoje kv\u016fli v\u00fdm\u011bn\u011b kol\u00edk\u016f \u2013 co\u017e je v\u00fdhoda v komer\u010dn\u00edch provozech, kde je produktivita za hodinu kritick\u00e1.<\/p>\n<\/div>\n

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Elektronick\u00fd omezova\u010d to\u010div\u00e9ho momentu<\/p>\n

Modern\u00ed \u0161t\u011bpkova\u010de s vlastn\u00edm pohonem (poh\u00e1n\u011bn\u00e9 motorem) mohou pou\u017e\u00edvat elektronick\u00e9 senzory na hydraulick\u00e9m pod\u00e1vac\u00edm syst\u00e9mu, kter\u00e9 detekuj\u00ed p\u0159et\u00ed\u017een\u00ed kroutic\u00edm momentem a obr\u00e1t\u00ed pod\u00e1vac\u00ed v\u00e1lce p\u0159ed zastaven\u00edm \u0159ezac\u00ed hlavy. Tento p\u0159\u00edstup p\u0159\u00edmo nechr\u00e1n\u00ed p\u0159evodovku (zuby ozuben\u00e9ho kola st\u00e1le za\u017e\u00edvaj\u00ed pln\u00fd n\u00e1razov\u00fd moment p\u0159ed obr\u00e1cen\u00edm pod\u00e1v\u00e1n\u00ed), ale zabra\u0148uje trval\u00e9mu p\u0159et\u00ed\u017een\u00ed. \u0160t\u011bpkova\u010de poh\u00e1n\u011bn\u00e9 v\u00fdvodov\u00fdm h\u0159\u00eddelem z\u0159\u00eddka obsahuj\u00ed elektronick\u00e9 omezen\u00ed kroutic\u00edho momentu kv\u016fli absenci palubn\u00edho \u0159\u00eddic\u00edho syst\u00e9mu.<\/p>\n<\/div>\n<\/div>\n

D\u016fle\u017eit\u00e9 pravidlo pro syst\u00e9my s st\u0159i\u017en\u00fdmi kol\u00edky: nikdy nenahrazujte kol\u00edk nebo \u0161roub s vy\u0161\u0161\u00ed pevnost\u00ed, abyste \u201evy\u0159e\u0161ili\u201c probl\u00e9m \u010dast\u00e9ho l\u00e1m\u00e1n\u00ed kol\u00edk\u016f. Pokud se kol\u00edky l\u00e1mou pravideln\u011b, je \u0161t\u011bpkova\u010d p\u0159et\u00ed\u017een\u00fd \u2013 pr\u016fm\u011br v\u011btve nebo rychlost posuvu p\u0159ekra\u010duje kapacitu stroje, nebo jsou no\u017ee tup\u00e9 (tup\u00e9 no\u017ee exponenci\u00e1ln\u011b zvy\u0161uj\u00ed \u0159ezn\u00e9 s\u00edly). Tvrd\u0161\u00ed kol\u00edk jednodu\u0161e p\u0159esm\u011bruje poruchu do ozuben\u00e9ho soukol\u00ed, \u010d\u00edm\u017e se levn\u00e1 v\u00fdm\u011bna kol\u00edku prom\u011bn\u00ed v drahou gener\u00e1ln\u00ed opravu p\u0159evodovky.<\/p>\n

<\/p>\n

Po\u017eadavky na materi\u00e1l a tvrdost ozuben\u00fdch kol<\/h2>\n

Zuby ozuben\u00e9ho kola uvnit\u0159 p\u0159evodovky \u0161t\u011bpkova\u010de mus\u00ed odol\u00e1vat jak povrchov\u00e9 \u00fanav\u011b (d\u016flkov\u00e1n\u00ed v d\u016fsledku opakovan\u00e9ho kontaktn\u00edho nam\u00e1h\u00e1n\u00ed), tak \u00fanav\u011b v ohybu (prask\u00e1n\u00ed ko\u0159en\u016f zub\u016f v d\u016fsledku opakovan\u00e9ho ohybov\u00e9ho zat\u00ed\u017een\u00ed). R\u00e1zov\u00e1 povaha zat\u00ed\u017een\u00ed \u0161t\u011bpkova\u010de klade dal\u0161\u00ed po\u017eadavky na hou\u017eevnatost ozuben\u00e9ho kola \u2013 schopnost absorbovat energii n\u00e1razu bez k\u0159ehk\u00e9ho lomu.<\/p>\n

Standardn\u00ed kalen\u00e1 ozuben\u00e1 kola (nap\u0159. z legovan\u00e9 oceli 4140 tepeln\u011b zpracovan\u00e9 na 280\u2013320 HB) poskytuj\u00ed dostate\u010dnou tvrdost povrchu pro st\u0159edn\u011b n\u00e1ro\u010dn\u00e9 \u0161t\u011bpkova\u010de manipuluj\u00edc\u00ed s m\u011bkk\u00fdm d\u0159evem a k\u0159ovinami. Pro vysoce n\u00e1ro\u010dn\u00e9 \u0161t\u011bpkova\u010de zpracov\u00e1vaj\u00edc\u00ed tvrd\u00e9 d\u0159evo jsou vy\u017eadov\u00e1na cementa\u010dn\u011b kalen\u00e1 ozuben\u00e1 kola. Cementace (cementace nebo nitridace) vytv\u00e1\u0159\u00ed tvrdou vn\u011bj\u0161\u00ed vrstvu odolnou proti opot\u0159eben\u00ed (58\u201362 HRC) nad hou\u017eevnat\u00fdm, tv\u00e1rn\u00fdm j\u00e1drem (30\u201340 HRC). Tvrd\u00fd povrch odol\u00e1v\u00e1 d\u016flkov\u00e9 korozi a opot\u0159eben\u00ed; hou\u017eevnat\u00e9 j\u00e1dro absorbuje energii n\u00e1razu bez prask\u00e1n\u00ed.<\/p>\n

Kritickou specifikac\u00ed pro ozuben\u00e1 kola p\u0159evodovek \u0161t\u011bpkova\u010de je hloubka pouzdra vzhledem k modulu zubu. Nedostate\u010dn\u00e1 hloubka pouzdra zp\u016fsobuje drcen\u00ed pouzdra \u2013 tvrd\u00e1 povrchov\u00e1 vrstva se p\u0159i opakovan\u00e9m siln\u00e9m zat\u00ed\u017een\u00ed hrout\u00ed, proto\u017ee m\u011bk\u010d\u00ed j\u00e1dro pod n\u00ed ji nem\u016f\u017ee un\u00e9st. Nadm\u011brn\u00e1 hloubka pouzdra sni\u017euje tuhou \u010d\u00e1st j\u00e1dra, co\u017e zp\u016fsobuje k\u0159ehkost zubu a jeho n\u00e1chylnost k lomu ko\u0159ene p\u0159i n\u00e1razu. zem\u011bd\u011blsk\u00e1 p\u0159evodovka<\/a> V\u00fdrobci uv\u00e1d\u011bj\u00ed pro ozuben\u00e1 kola t\u0159\u00eddy chipper hloubku pouzdra 0,8\u20131,5 mm v z\u00e1vislosti na velikosti zubu a o\u010dek\u00e1van\u00e9m r\u00e1zov\u00e9m zat\u00ed\u017een\u00ed.<\/p>\n

<\/p>\n

\u0160t\u011bpkova\u010de s pohonem v\u00fdvodov\u00fdm h\u0159\u00eddelem vs. hydraulicky poh\u00e1n\u011bn\u00e9<\/h2>\n

\u0160t\u011bpkova\u010de d\u0159eva z\u00edsk\u00e1vaj\u00ed energii jedn\u00edm ze dvou zp\u016fsob\u016f: mechanick\u00fdm pohonem v\u00fdvodov\u00fdm h\u0159\u00eddelem z traktoru (u model\u016f s pohonem v\u00fdvodov\u00fdm h\u0159\u00eddelem) nebo vlastn\u00edm motorem s p\u0159\u00edm\u00fdm nebo \u0159emenov\u00fdm pohonem (u samostatn\u00fdch model\u016f). N\u011bkter\u00e9 \u0161t\u011bpkova\u010de nesen\u00e9 na traktoru pou\u017e\u00edvaj\u00ed hydraulick\u00fd syst\u00e9m traktoru k pohonu hydraulick\u00e9ho motoru \u0161t\u011bpkova\u010de, ale tento p\u0159\u00edstup m\u00e1 pro \u0161t\u011bpkov\u00e1n\u00ed zna\u010dn\u00e1 omezen\u00ed.<\/p>\n

\n
\n

Mechanick\u00fd pohon v\u00fdvodov\u00e9ho h\u0159\u00eddele<\/p>\n

V\u00fdvodov\u00fd h\u0159\u00eddel traktoru se p\u0159ipojuje ke vstupu p\u0159evodovky \u0161t\u011bpkova\u010de prost\u0159ednictv\u00edm hnac\u00edho \u00fastroj\u00ed s univerz\u00e1ln\u00edmi klouby. P\u0159evodovka sni\u017euje ot\u00e1\u010dky v\u00fdvodov\u00e9ho h\u0159\u00eddele (540 nebo 1000 ot.\/min.) na ot\u00e1\u010dky \u0159ezac\u00ed hlavy a podle pot\u0159eby p\u0159esm\u011brov\u00e1v\u00e1 pohonnou osu. Toto je nej\u00fa\u010dinn\u011bj\u0161\u00ed zp\u016fsob p\u0159enosu v\u00fdkonu \u2013 mechanick\u00e9 ztr\u00e1ty jsou minim\u00e1ln\u00ed (2\u20133% p\u0159es hnac\u00ed \u00fastroj\u00ed a p\u0159evodovku). Pohon v\u00fdvodov\u00fdm h\u0159\u00eddelem je standardem pro zem\u011bd\u011blsk\u00e9 a krajin\u00e1\u0159sk\u00e9 \u0161t\u011bpkova\u010de s kapacitou od 3 do 12 palc\u016f.<\/p>\n<\/div>\n

\n

Pohon hydraulick\u00e9ho motoru<\/p>\n

Hydraulick\u00e9 \u010derpadlo na v\u00fdvodov\u00e9m h\u0159\u00eddeli traktoru poh\u00e1n\u00ed hydraulick\u00fd motor \u0161t\u011bpkova\u010de, kter\u00fd ot\u00e1\u010d\u00ed \u0159ezac\u00ed hlavou pomoc\u00ed jednoduch\u00e9 spojky nebo \u0159emenu. T\u00edm se zcela eliminuje mechanick\u00e1 p\u0159evodovka, ale doch\u00e1z\u00ed ke ztr\u00e1t\u011b hydraulick\u00e9 \u00fa\u010dinnosti 15\u201325%. Hydraulick\u00fd syst\u00e9m traktoru nemus\u00ed poskytovat dostate\u010dn\u00fd pr\u016ftok a tlak u \u0161t\u011bpkova\u010d\u016f s kapacitou nad 6 palc\u016f. Hydraulick\u00fd pohon se pou\u017e\u00edv\u00e1 hlavn\u011b u mal\u00fdch \u0161t\u011bpkova\u010d\u016f a model\u016f s t\u0159\u00edbodov\u00fdm z\u00e1v\u011bsem.<\/p>\n<\/div>\n<\/div>\n

\"D\u00edlna<\/div>\n
\"D\u00edlna<\/div>\n

<\/p>\n

Dimenzov\u00e1n\u00ed p\u0159evodovky pro aplikaci s \u0161t\u011bpkova\u010dem d\u0159eva<\/h2>\n

Spr\u00e1vn\u00e9 dimenzov\u00e1n\u00ed p\u0159evodovky pro pou\u017eit\u00ed s \u200b\u200b\u0161t\u011bpkova\u010dem vy\u017eaduje \u010dty\u0159i vstupy: v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele traktoru, po\u017eadovan\u00e9 ot\u00e1\u010dky \u0159ezn\u00e9 hlavy, maxim\u00e1ln\u00ed pr\u016fm\u011br v\u011btve a p\u0159evl\u00e1daj\u00edc\u00ed druh zpracov\u00e1van\u00e9ho d\u0159eva. Z t\u011bchto \u00fadaj\u016f lze vypo\u010d\u00edtat po\u017eadovan\u00fd trval\u00fd to\u010div\u00fd moment, maxim\u00e1ln\u00ed r\u00e1zov\u00fd moment a vhodn\u00fd provozn\u00ed faktor.<\/p>\n

Obecn\u011b plat\u00ed, \u017ee \u0161t\u011bpkova\u010de d\u0159eva pot\u0159ebuj\u00ed p\u0159ibli\u017en\u011b 3\u20135 HP na palec maxim\u00e1ln\u00edho pr\u016fm\u011bru v\u011btve pro m\u011bkk\u00e9 d\u0159evo (borovice, vrba, topol) a 5\u20138 HP na palec pro tvrd\u00e9 d\u0159evo (dub, o\u0159ech, javor). \u0160t\u011bpkova\u010d ur\u010den\u00fd pro tvrd\u00e9 d\u0159evo o pr\u016fm\u011bru 8 palc\u016f (20 cm) pot\u0159ebuje na v\u00fdvodov\u00e9m h\u0159\u00eddeli 40\u201364 HP. P\u0159evodovka mus\u00ed b\u00fdt dimenzov\u00e1na na maxim\u00e1ln\u00ed to\u010div\u00fd moment p\u0159i maxim\u00e1ln\u00edm pr\u016fm\u011bru v\u011btve, nikoli na pr\u016fm\u011brn\u00fd provozn\u00ed to\u010div\u00fd moment p\u0159i \u0161t\u011bpkov\u00e1n\u00ed men\u0161\u00edho materi\u00e1lu.<\/p>\n

Provozn\u00ed faktor p\u0159evodovek \u0161t\u011bpkova\u010de by m\u011bl b\u00fdt minim\u00e1ln\u011b 2,0 pro provoz pouze s m\u011bkk\u00fdm d\u0159evem a 2,5\u20133,0 pro provoz se sm\u00ed\u0161en\u00fdm nebo tvrd\u00fdm d\u0159evem. To znamen\u00e1, \u017ee trval\u00fd jmenovit\u00fd kroutic\u00ed moment p\u0159evodovky by m\u011bl b\u00fdt 2,0\u20133,0n\u00e1sobek vypo\u010d\u00edtan\u00e9ho pr\u016fm\u011brn\u00e9ho provozn\u00edho kroutic\u00edho momentu. Tato rezerva zohled\u0148uje r\u00e1zovou povahu zat\u00ed\u017een\u00ed, kol\u00eds\u00e1n\u00ed hustoty d\u0159eva v r\u00e1mci jedn\u00e9 v\u011btve a nevyhnuteln\u00e9 setk\u00e1n\u00ed s tvrd\u00fdmi suky, zapu\u0161t\u011bn\u00fdm kovem a dal\u0161\u00edmi skryt\u00fdmi p\u0159ek\u00e1\u017ekami.<\/p>\n

<\/p>\n

Maz\u00e1n\u00ed a \u00fadr\u017eba p\u0159evodovek \u0161t\u011bpkova\u010de<\/h2>\n

Prost\u0159ed\u00ed r\u00e1zov\u00e9ho zat\u00ed\u017een\u00ed a vibrac\u00ed uvnit\u0159 p\u0159evodovky \u0161t\u011bpkova\u010de d\u0159eva m\u00e1 spole\u010dn\u00e9 vlastnosti s aplikacemi rota\u010dn\u00edch kultiv\u00e1tor\u016f \u2013 zrychlen\u00e1 oxidace oleje v d\u016fsledku strh\u00e1v\u00e1n\u00ed vzduchu, potenci\u00e1ln\u00ed naru\u0161en\u00ed filmu EHD v kontaktech zub\u016f ozuben\u00fdch kol a tvorba kovov\u00fdch \u00falomk\u016f v d\u016fsledku zrychlen\u00e9ho opot\u0159eben\u00ed. Strategie maz\u00e1n\u00ed mus\u00ed tyto podm\u00ednky \u0159e\u0161it.<\/p>\n

Standardn\u011b se doporu\u010duje p\u0159evodov\u00fd olej EP (Extreme Pressure) spl\u0148uj\u00edc\u00ed specifikaci GL-5 s viskozitou SAE 80W-90. Syntetick\u00e9 p\u0159evodov\u00e9 oleje EP nab\u00edzej\u00ed vynikaj\u00edc\u00ed tepelnou stabilitu a pevnost filmu pro komer\u010dn\u00ed \u0161t\u011bpkova\u010de provozovan\u00e9 mnoho hodin denn\u011b. Intervaly v\u00fdm\u011bny p\u0159evodovek \u0161t\u011bpkova\u010d\u016f by m\u011bly b\u00fdt 50\u201375 provozn\u00edch hodin kv\u016fli vysok\u00e9mu vibra\u010dn\u00edmu a r\u00e1zov\u00e9mu zat\u00ed\u017een\u00ed \u2013 krat\u0161\u00ed ne\u017e intervaly 100\u2013150 hodin typick\u00e9 pro m\u00e9n\u011b zat\u00ed\u017een\u00e9 zem\u011bd\u011blsk\u00e9 p\u0159evodovky.<\/p>\n

P\u0159ed ka\u017edou prac\u00ed zkontrolujte hladinu oleje a prohl\u00e9dn\u011bte magnetickou vypou\u0161t\u011bc\u00ed z\u00e1tku. P\u0159evodovky \u0161t\u011bpkova\u010d\u016f d\u0159eva produkuj\u00ed v d\u016fsledku r\u00e1zov\u00e9ho zat\u00ed\u017een\u00ed v\u00edce kovov\u00fdch ne\u010distot ne\u017e v\u011bt\u0161ina zem\u011bd\u011blsk\u00fdch aplikac\u00ed. V\u00fdznamn\u00e9 nahromad\u011bn\u00ed kovov\u00fdch \u010d\u00e1stic na vypou\u0161t\u011bc\u00ed z\u00e1tce mezi v\u00fdm\u011bnami oleje nazna\u010duje zrychlen\u00e9 vnit\u0159n\u00ed opot\u0159eben\u00ed. Pokud ne\u010distoty obsahuj\u00ed viditeln\u00e9 \u00falomky zub\u016f ozuben\u00fdch kol (leskl\u00e9 kovov\u00e9 kousky se zak\u0159iven\u00fdm profilem), je t\u0159eba p\u0159ed dal\u0161\u00edm provozem okam\u017eit\u011b zkontrolovat vnit\u0159n\u00ed prostor p\u0159evodovky.<\/p>\n

\n

\ud83d\udd27 Additional Maintenance Checks for Chipper Gearboxes<\/p>\n

\u25cf<\/span><\/p>\n

V\u016fle v\u00fdstupn\u00edho lo\u017eiska:<\/strong> Ru\u010dn\u011b zkontrolujte radi\u00e1ln\u00ed a axi\u00e1ln\u00ed v\u016fli na v\u00fdstupn\u00edm h\u0159\u00eddeli. Jak\u00e1koli znateln\u00e1 v\u016fle nazna\u010duje opot\u0159eben\u00ed lo\u017eiska, kter\u00e9 je t\u0159eba \u0159e\u0161it d\u0159\u00edve, ne\u017e dojde k nesouososti ozuben\u00fdch kol.<\/p>\n<\/div>\n

\u25cf<\/span><\/p>\n

Utahovac\u00ed moment upev\u0148ovac\u00edch \u0161roub\u016f:<\/strong> Vibrace uvol\u0148uj\u00ed upev\u0148ovac\u00ed \u0161rouby p\u0159evodovky. V\u0161echny upev\u0148ovac\u00ed prvky dotahujte ka\u017ed\u00fdch 25\u201350 hodin. Uvoln\u011bn\u00e1 sk\u0159\u00ed\u0148 p\u0159evodovky se pod zat\u00ed\u017een\u00edm posouv\u00e1, co\u017e zp\u016fsobuje nesouosost s \u0159eznou hlavou a zrychlen\u00e9 opot\u0159eben\u00ed lo\u017eisek.<\/p>\n<\/div>\n

\u25cf<\/span><\/p>\n

Ostrost \u010depele:<\/strong> I kdy\u017e tup\u00e9 no\u017ee \u0161t\u011bpkova\u010de nejsou sou\u010d\u00e1st\u00ed p\u0159evodovky, dramaticky zvy\u0161uj\u00ed s\u00edlu pot\u0159ebnou k \u0159ez\u00e1n\u00ed d\u0159eva \u2013 a t\u00edm efektivn\u011b p\u0159et\u011b\u017euj\u00ed p\u0159evodovku. Udr\u017eov\u00e1n\u00ed ostr\u00fdch no\u017e\u016f je jedn\u00edm z nej\u00fa\u010dinn\u011bj\u0161\u00edch zp\u016fsob\u016f, jak prodlou\u017eit \u017eivotnost p\u0159evodovky. Ot\u00e1\u010den\u00ed nebo ost\u0159en\u00ed no\u017e\u016f by m\u011blo b\u00fdt prov\u00e1d\u011bno podle pl\u00e1nu v\u00fdrobce \u0161t\u011bpkova\u010de.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
\n
\nKolik kon\u00ed pot\u0159ebuji pro \u0161t\u011bpkova\u010d d\u0159eva s v\u00fdvodov\u00fdm h\u0159\u00eddelem?+<\/span><\/summary>\n
\n

Jako vod\u00edtko po\u010d\u00edtejte s v\u00fdkonem 5\u20138 HP na palec maxim\u00e1ln\u00edho pr\u016fm\u011bru v\u011btve pro \u0161t\u011bpkov\u00e1n\u00ed tvrd\u00e9ho d\u0159eva. \u0160t\u011bpkova\u010d s kapacitou 6 palc\u016f (15 cm) pot\u0159ebuje v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele 30\u201348 HP; \u0161t\u011bpkova\u010d s kapacitou 8 palc\u016f (20 cm) pot\u0159ebuje v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele 40\u201364 HP; \u0161t\u011bpkova\u010d s kapacitou 12 palc\u016f (30 cm) pot\u0159ebuje v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele 60\u201396 HP. V\u017edy p\u0159izp\u016fsobte jmenovit\u00fd kroutic\u00ed moment p\u0159evodovky horn\u00ed hranici rozsahu HP s vhodn\u00fdm servisn\u00edm faktorem 2,0\u20133,0.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nPro\u010d se mi u \u0161t\u011bpkova\u010de st\u00e1le l\u00e1mou st\u0159i\u017en\u00e9 kol\u00edky?+<\/span><\/summary>\n
\n

T\u0159i nej\u010dast\u011bj\u0161\u00ed p\u0159\u00ed\u010diny \u010dast\u00e9ho selh\u00e1n\u00ed st\u0159i\u017en\u00fdch kol\u00edk\u016f jsou: (1) pod\u00e1v\u00e1n\u00ed v\u011btv\u00ed, kter\u00e9 p\u0159ekra\u010duj\u00ed jmenovitou kapacitu \u0161t\u011bpkova\u010de; (2) tup\u00e9 no\u017ee, kter\u00e9 zvy\u0161uj\u00ed \u0159ezn\u00e9 s\u00edly 2\u20134kr\u00e1t ve srovn\u00e1n\u00ed s ostr\u00fdmi no\u017ei; (3) pou\u017eit\u00ed nespr\u00e1vn\u00e9ho materi\u00e1lu nebo velikosti kol\u00edku. Nejprve zkontrolujte stav no\u017e\u016f \u2013 toto je nejb\u011b\u017en\u011bj\u0161\u00ed a nejjednodu\u0161\u0161\u00ed \u0159e\u0161en\u00ed. Pokud jsou no\u017ee ostr\u00e9 a materi\u00e1l odpov\u00edd\u00e1 specifikaci, \u0161t\u011bpkova\u010d m\u016f\u017ee b\u00fdt pro danou pr\u00e1ci poddimenzovan\u00fd. Nikdy nenahrazujte st\u0159i\u017en\u00e9 kol\u00edky tvrd\u0161\u00edmi \u0161rouby \u2013 t\u00edm se porucha p\u0159enese na p\u0159evodovku.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nM\u00e1m pro sv\u016fj \u0161t\u011bpkova\u010d pou\u017e\u00edt v\u00fdvodov\u00fd h\u0159\u00eddel s ot\u00e1\u010dkami 540 nebo 1000 ot.\/min?+<\/span><\/summary>\n
\n

V\u011bt\u0161ina \u0161t\u011bpkova\u010d\u016f s v\u00fdvodov\u00fdm h\u0159\u00eddelem do kapacity 8 palc\u016f (20 cm) pou\u017e\u00edv\u00e1 v\u00fdvodov\u00fd h\u0159\u00eddel s ot\u00e1\u010dkami 540 ot.\/min. V\u011bt\u0161\u00ed komer\u010dn\u00ed \u0161t\u011bpkova\u010de (25 cm a v\u011bt\u0161\u00ed) \u010dasto pou\u017e\u00edvaj\u00ed v\u00fdvodov\u00fd h\u0159\u00eddel s ot\u00e1\u010dkami 1000 ot.\/min, proto\u017ee vy\u0161\u0161\u00ed vstupn\u00ed ot\u00e1\u010dky poskytuj\u00ed v\u011bt\u0161\u00ed v\u00fdkon p\u0159i dan\u00e9m to\u010div\u00e9m momentu motoru a umo\u017e\u0148uj\u00ed jednodu\u0161\u0161\u00ed p\u0159evodov\u00fd pom\u011br pro dosa\u017een\u00ed po\u017eadovan\u00fdch ot\u00e1\u010dek \u0159ezac\u00ed hlavy. V\u00e1\u0161 \u0161t\u011bpkova\u010d mus\u00ed odpov\u00eddat ot\u00e1\u010dk\u00e1m v\u00fdvodov\u00e9ho h\u0159\u00eddele va\u0161eho traktoru \u2013 nepou\u017e\u00edvejte \u0161t\u011bpkova\u010d s ot\u00e1\u010dkami 540 ot.\/min na v\u00fdstupu s ot\u00e1\u010dkami v\u00fdvodov\u00e9ho h\u0159\u00eddele 1000 ot.\/min bez reduktoru ot\u00e1\u010dek, proto\u017ee zdvojn\u00e1soben\u00e9 ot\u00e1\u010dky zp\u016fsob\u00ed nebezpe\u010dn\u00e9 p\u0159ekro\u010den\u00ed ot\u00e1\u010dek \u0159ezac\u00ed hlavy.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nJak\u00fd typ p\u0159evodov\u00e9ho oleje bych m\u011bl pou\u017e\u00edt v p\u0159evodovce m\u00e9ho \u0161t\u011bpkova\u010de?+<\/span><\/summary>\n
\n

P\u0159evodov\u00fd olej EP (Extreme Pressure) s viskozitn\u00ed t\u0159\u00eddou SAE 80W-90 spl\u0148uj\u00edc\u00ed specifikaci GL-5. Aditiva EP jsou nezbytn\u00e1, proto\u017ee r\u00e1zov\u00e9 zat\u00ed\u017een\u00ed v drti\u010d\u00edch zp\u016fsobuje do\u010dasn\u00e9 naru\u0161en\u00ed olejov\u00e9ho filmu v m\u00edstech kontaktu zub\u016f ozuben\u00fdch kol. Syntetick\u00e9 p\u0159evodov\u00e9 oleje EP poskytuj\u00ed lep\u0161\u00ed ochranu p\u0159i extr\u00e9mn\u00edch teplot\u00e1ch a siln\u00e9m r\u00e1zov\u00e9m zat\u00ed\u017een\u00ed. Vym\u011b\u0148ujte olej ka\u017ed\u00fdch 50\u201375 provozn\u00edch hodin.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nMohu na \u0161t\u011bpkova\u010di pou\u017e\u00edt standardn\u00ed zem\u011bd\u011blskou p\u0159evodovku?+<\/span><\/summary>\n
\n

Pouze pokud je p\u0159evodovka dimenzov\u00e1na na dostate\u010dn\u00fd provozn\u00ed faktor pro r\u00e1zov\u00e9 zat\u00ed\u017een\u00ed. P\u0159evodovka s v\u00fdkonem 50 HP pro nep\u0159etr\u017eit\u00fd provoz u rota\u010dn\u00ed seka\u010dky nem\u00e1 stejnou odolnost proti n\u00e1razu jako p\u0159evodovka s v\u00fdkonem 50 HP pro \u0161t\u011bpkova\u010d. \u0160t\u011bpkova\u010d vy\u017eaduje kalen\u00e1 ozuben\u00e1 kola, odoln\u00e1 lo\u017eiska dimenzovan\u00e1 pro p\u0159echodn\u00e9 p\u0159et\u00ed\u017een\u00ed a kryt navr\u017een\u00fd tak, aby odolal vibra\u010dn\u00edmu prost\u0159ed\u00ed. V\u017edy vyberte p\u0159evodovku speci\u00e1ln\u011b dimenzovanou pro \u0161t\u011bpkova\u010d nebo r\u00e1zov\u00e9 zat\u00ed\u017een\u00ed.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nJak pozn\u00e1m, kdy je pot\u0159eba vym\u011bnit p\u0159evodovku \u0161t\u011bpkova\u010de?+<\/span><\/summary>\n
\n

Mezi varovn\u00e9 sign\u00e1ly pat\u0159\u00ed: sk\u0159\u00edpav\u00fd nebo kv\u00edliv\u00fd zvuk, kter\u00fd se zhor\u0161uje p\u0159i zat\u00ed\u017een\u00ed, nadm\u011brn\u00e1 v\u016fle u \u0159ezac\u00ed hlavy (klep\u00e1n\u00ed p\u0159i nakl\u00e1d\u00e1n\u00ed a vykl\u00e1d\u00e1n\u00ed \u0161t\u011bpkova\u010de), \u00fanik oleje z t\u011bsn\u011bn\u00ed, viditeln\u00e9 kovov\u00e9 \u00falomky na magnetick\u00e9 vypou\u0161t\u011bc\u00ed z\u00e1tce a hork\u00fd dotek sk\u0159\u00edn\u011b p\u0159evodovky po m\u00edrn\u00e9 pr\u00e1ci. Pokud se objev\u00ed v\u00edce p\u0159\u00edznak\u016f, m\u011bla by b\u00fdt p\u0159evodovka demontov\u00e1na a zkontrolov\u00e1na uvnit\u0159, ne\u017e dojde ke katastrofick\u00e9 poru\u0161e.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

<\/p>\n

\n

Vytvo\u0159eno pro n\u00e1raz: P\u0159evodovky PTO pro \u0161t\u011bpkova\u010d<\/h2>\n

V\u011b\u010dn\u00e1 s\u00edla<\/a> dod\u00e1v\u00e1 p\u0159evodovky PTO s kalen\u00fdmi ozuben\u00fdmi koly a lo\u017eisky odoln\u00fdmi proti n\u00e1razu, kter\u00e9 jsou speci\u00e1ln\u011b navr\u017eeny pro n\u00e1ro\u010dn\u00e9 zat\u00ed\u017een\u00ed \u0161t\u011bpkova\u010de d\u0159eva.<\/p>\n

\u017d\u00e1dost o cenovou nab\u00eddku na p\u0159evodovku \u0161t\u011bpkova\u010de<\/a><\/p>\n<\/div>\n

St\u0159iha\u010d: Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Gearbox for Wood Chippers: Choosing the Right Drive A rotary cutter glides through standing grass with minimal resistance variation. A wood chipper, by contrast, faces an instant torque demand that can spike from near-zero to full stall load the moment a hardwood branch enters the cutting disc. This extreme load profile makes the gearbox inside […]<\/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":[4042],"tags":[],"class_list":["post-1231","post","type-post","status-publish","format-standard","hentry","category-agricultural-gearbox"],"_links":{"self":[{"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/posts\/1231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/comments?post=1231"}],"version-history":[{"count":1,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/posts\/1231\/revisions"}],"predecessor-version":[{"id":1232,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/posts\/1231\/revisions\/1232"}],"wp:attachment":[{"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/media?parent=1231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/categories?post=1231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/tags?post=1231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}