{"id":1217,"date":"2026-05-20T05:04:47","date_gmt":"2026-05-20T05:04:47","guid":{"rendered":"https:\/\/pto-gearbox.net\/?p=1217"},"modified":"2026-05-20T05:04:47","modified_gmt":"2026-05-20T05:04:47","slug":"pto-speed-increaser-vs-gear-reducer-when-to-use-each","status":"publish","type":"post","link":"https:\/\/pto-gearbox.net\/cs\/pto-speed-increaser-vs-gear-reducer-when-to-use-each\/","title":{"rendered":"Zvy\u0161ova\u010d ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele vs. reduktor: Kdy pou\u017e\u00edt kter\u00fd z nich"},"content":{"rendered":"
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Zvy\u0161ova\u010d ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele vs. reduktor: Kdy pou\u017e\u00edt kter\u00fd z nich<\/h1>\n

P\u0159edstavte si \u0159azen\u00ed j\u00edzdn\u00edho kola: n\u00edzk\u00fd p\u0159evodov\u00fd stupe\u0148 zn\u00e1sobuje s\u00edlu \u0161lap\u00e1n\u00ed p\u0159i stoup\u00e1n\u00ed do kopce na \u00fakor ot\u00e1\u010dek kola, zat\u00edmco vysok\u00fd p\u0159evodov\u00fd stupe\u0148 zn\u00e1sobuje rychlost kola na rovn\u00fdch silnic\u00edch na \u00fakor to\u010div\u00e9ho momentu nohou. P\u0159evodovka PTO d\u011bl\u00e1 p\u0159esn\u011b tot\u00e9\u017e \u2013 a volba \u0161patn\u00e9ho sm\u011bru stoj\u00ed bu\u010f v\u00fdkon, nebo hardware.<\/p>\n

Promluvte si s na\u0161imi odborn\u00edky na p\u0159evodovky<\/a><\/p>\n<\/div>\n<\/div>\n

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Z\u00e1kladn\u00ed princip: Rychlost a to\u010div\u00fd moment jsou kompromisem<\/h2>\n

Ka\u017ed\u00e1 p\u0159evodovka s v\u00fdvodov\u00fdm h\u0159\u00eddelem \u2013 a\u0165 u\u017e zvy\u0161uje nebo sni\u017euje rychlost \u2013 se \u0159\u00edd\u00ed stejn\u00fdm \u0159\u00edd\u00edc\u00edm z\u00e1konem mechaniky: v jak\u00e9mkoli p\u0159evodov\u00e9m syst\u00e9mu se vstupn\u00ed v\u00fdkon rovn\u00e1 v\u00fdstupn\u00edmu v\u00fdkonu m\u00ednus ztr\u00e1ty t\u0159en\u00edm. V\u00fdkon je sou\u010dinem to\u010div\u00e9ho momentu a ot\u00e1\u010dek. Kdy\u017e tedy p\u0159evodovka zv\u00fd\u0161\u00ed v\u00fdstupn\u00ed ot\u00e1\u010dky nad vstupn\u00ed ot\u00e1\u010dky, mus\u00ed \u00fam\u011brn\u011b sn\u00ed\u017eit v\u00fdstupn\u00ed to\u010div\u00fd moment. Naopak, kdy\u017e sn\u00ed\u017e\u00ed v\u00fdstupn\u00ed ot\u00e1\u010dky pod vstupn\u00ed ot\u00e1\u010dky, \u00fam\u011brn\u011b zv\u00fd\u0161\u00ed v\u00fdstupn\u00ed to\u010div\u00fd moment. Neexistuje \u017e\u00e1dn\u00e1 p\u0159evodovka, kter\u00e1 by n\u00e1sobila rychlost i to\u010div\u00fd moment sou\u010dasn\u011b \u2013 z\u00e1kon zachov\u00e1n\u00ed energie to zakazuje.<\/p>\n

Tato z\u00e1sada m\u00e1 z\u00e1sadn\u00ed praktick\u00e9 d\u016fsledky pro ka\u017ed\u00e9 n\u00e1\u0159ad\u00ed nesen\u00e9 na traktoru. P\u0159evodovka PTO<\/a> \u0158eza\u010dka, kter\u00e1 p\u0159en\u00e1\u0161\u00ed energii do rota\u010dn\u00ed fr\u00e9zy, mus\u00ed rozto\u010dit t\u011b\u017ek\u00e9 no\u017ee hustou vegetac\u00ed a zakopan\u00fdm odpadem. No\u017ee nar\u00e1\u017eej\u00ed na n\u00e1hl\u00fd, masivn\u00ed odpor \u2013 skryt\u00fd pa\u0159ez, k\u00e1men, sple\u0165 dr\u00e1t\u011bn\u00e9ho plotu zakopan\u00e9ho v k\u0159ov\u00ed. To, co n\u00e1\u0159ad\u00ed pot\u0159ebuje, je hrub\u00e1 rota\u010dn\u00ed s\u00edla p\u0159i st\u0159edn\u00ed rychlosti. Reduktor s v\u00fdvodov\u00fdm h\u0159\u00eddelem to zaji\u0161\u0165uje: vezme 540 nebo 1 000 ot.\/min. v\u00fdvodov\u00e9ho h\u0159\u00eddele a zpomal\u00ed je na 200 nebo 300 ot.\/min., p\u0159i\u010dem\u017e vyn\u00e1sob\u00ed dostupn\u00fd to\u010div\u00fd moment inverzn\u00ed hodnotou reduk\u010dn\u00edho pom\u011bru ot\u00e1\u010dek.<\/p>\n

Hydraulick\u00fd pohon \u010derpadla m\u00e1 opa\u010dn\u00fd po\u017eadavek. Vnit\u0159n\u00ed sou\u010d\u00e1sti \u010derpadla \u2013 ozuben\u00e1 kola, lopatky nebo p\u00edsty \u2013 jsou navr\u017eeny pro efektivn\u00ed provoz p\u0159i 1 500 a\u017e 3 000 ot\u00e1\u010dk\u00e1ch za minutu. 540 ot\u00e1\u010dek za minutu v\u00fdvodov\u00e9ho h\u0159\u00eddele je p\u0159\u00edli\u0161 pomal\u00fdch na to, aby se \u010derpadlo rozto\u010dilo v jeho konstruk\u010dn\u00edm bod\u011b. P\u0159evodovka se zvy\u0161ov\u00e1n\u00edm ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele zvy\u0161uje rychlost ot\u00e1\u010den\u00ed faktorem 2 a\u017e 6, \u010d\u00edm\u017e se dosahuje vysok\u00fdch ot\u00e1\u010dek, kter\u00e9 \u010derpadlo pot\u0159ebuje, a z\u00e1rove\u0148 se akceptuje ni\u017e\u0161\u00ed v\u00fdstupn\u00ed to\u010div\u00fd moment \u2013 \u200b\u200bco\u017e je p\u0159ijateln\u00e9, proto\u017ee \u010derpadla generuj\u00ed s\u00edlu prost\u0159ednictv\u00edm hydraulick\u00e9ho tlaku, nikoli mechanick\u00e9ho to\u010div\u00e9ho momentu.<\/p>\n

\"Zv\u00fd\u0161en\u00ed<\/div>\n

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Uvnit\u0159 reduktoru PTO: Mechanick\u00e1 architektura<\/h2>\n

V\u011bt\u0161ina zem\u011bd\u011blsk\u00fdch reduktor\u016f v\u00fdvodov\u00fdch h\u0159\u00eddel\u00ed pou\u017e\u00edv\u00e1 pravo\u00fahlou konfiguraci zalo\u017eenou na spir\u00e1lov\u00e9m ku\u017eelov\u00e9m soukol\u00ed. Vstupn\u00ed h\u0159\u00eddel, kter\u00e1 je spojena s \u010depem v\u00fdvodov\u00e9ho h\u0159\u00eddele traktoru pomoc\u00ed dr\u00e1\u017ekovan\u00e9 spojky, nese spir\u00e1lov\u00fd ku\u017eelov\u00fd pastorek o mal\u00e9m pr\u016fm\u011bru. Tento pastorek zab\u00edr\u00e1 s ku\u017eelov\u00fdm spir\u00e1lov\u00fdm ozuben\u00fdm kolem o v\u011bt\u0161\u00edm pr\u016fm\u011bru, namontovan\u00fdm na v\u00fdstupn\u00edm h\u0159\u00eddeli, kter\u00fd vystupuje z p\u0159evodovky pod \u00fahlem 90 stup\u0148\u016f ke vstupu. Pom\u011br mezi po\u010dtem zub\u016f na korunov\u00e9m kole a pastorku ur\u010duje sn\u00ed\u017een\u00ed ot\u00e1\u010dek \u2013 12zub\u00fd pastorek poh\u00e1n\u011bj\u00edc\u00ed 36zub\u00fd korunov\u00fd pastorek vytv\u00e1\u0159\u00ed redukci 3:1, \u010d\u00edm\u017e p\u0159em\u011b\u0148uje vstupn\u00ed ot\u00e1\u010dky 540 ot\/min na v\u00fdstupn\u00ed ot\u00e1\u010dky 180 ot\/min a z\u00e1rove\u0148 ztrojn\u00e1sobuje dostupn\u00fd to\u010div\u00fd moment.<\/p>\n

Spir\u00e1lov\u00e1 ku\u017eelov\u00e1 ozuben\u00e1 kola jsou up\u0159ednost\u0148ov\u00e1na p\u0159ed p\u0159\u00edm\u00fdmi ku\u017eelov\u00fdmi ozuben\u00fdmi koly ze stejn\u00e9ho d\u016fvodu, pro\u010d jsou \u0161ikm\u00e1 ozuben\u00e1 kola up\u0159ednost\u0148ov\u00e1na p\u0159ed \u010deln\u00edmi ozuben\u00fdmi koly v uspo\u0159\u00e1d\u00e1n\u00ed s rovnob\u011b\u017en\u00fdmi h\u0159\u00eddeli: \u0161ikm\u00fd kontakt zub\u016f se postupn\u011b pohybuje po \u010deln\u00ed plo\u0161e ozuben\u00e9ho kola, co\u017e vede k plynulej\u0161\u00edmu p\u0159enosu kroutic\u00edho momentu a v\u00fdrazn\u011b ni\u017e\u0161\u00ed hlu\u010dnosti. V zem\u011bd\u011blsk\u00e9 p\u0159evodovce, kter\u00e1 m\u016f\u017ee b\u011bhem sv\u00e9 \u017eivotnosti pracovat tis\u00edce hodin, prodlu\u017euje sn\u00ed\u017een\u00e9 vibra\u010dn\u00ed zat\u00ed\u017een\u00ed spir\u00e1lov\u00fdm ku\u017eelov\u00fdm ozuben\u00fdm kolem tak\u00e9 \u017eivotnost lo\u017eisek a sk\u0159\u00edn\u011b ve srovn\u00e1n\u00ed s alternativami s p\u0159\u00edm\u00fdmi ku\u017eelov\u00fdmi koly.<\/p>\n

Sk\u0159\u00ed\u0148 pravo\u00fahl\u00e9ho reduktoru mus\u00ed plnit n\u011bkolik \u00fakol\u016f sou\u010dasn\u011b. Umis\u0165uje vstupn\u00ed a v\u00fdstupn\u00ed lo\u017eiska s mikronovou p\u0159esnost\u00ed, aby se zajistilo spr\u00e1vn\u00e9 vyrovn\u00e1n\u00ed z\u00e1b\u011bru ozuben\u00fdch kol pod zat\u00ed\u017een\u00edm. Obsahuje mazac\u00ed olejovou l\u00e1ze\u0148 a p\u0159iv\u00e1d\u00ed maz\u00e1n\u00ed rozst\u0159ikem k horn\u00edm lo\u017eisk\u016fm, kter\u00e1 by jinak b\u011b\u017eela nasucho. Zaji\u0161\u0165uje konstruk\u010dn\u00ed mont\u00e1\u017en\u00ed rozhran\u00ed \u2013 obvykle \u010dty\u0159i nebo \u0161est otvor\u016f pro \u0161rouby v p\u0159\u00edrubov\u00e9m vzoru \u2013 kter\u00e9 spojuje p\u0159evodovku s r\u00e1mem stroje. A mus\u00ed absorbovat reak\u010dn\u00ed moment ze z\u00e1b\u011bru ozuben\u00fdch kol, ani\u017e by se dostate\u010dn\u011b vych\u00fdlila, aby naru\u0161ila vyrovn\u00e1n\u00ed lo\u017eisek.<\/p>\n

Litina z\u016fst\u00e1v\u00e1 dominantn\u00edm materi\u00e1lem pouzder pro zem\u011bd\u011blsk\u00e9 reduktory, proto\u017ee nab\u00edz\u00ed vynikaj\u00edc\u00ed tlumen\u00ed vibrac\u00ed, dobrou tepelnou vodivost, p\u0159esnou sl\u00e9vatelnost pro tolerance otvor\u016f lo\u017eisek a p\u0159irozenou odolnost proti korozi ve venkovn\u00edm zem\u011bd\u011blsk\u00e9m prost\u0159ed\u00ed. Hlin\u00edkov\u00e1 pouzdra se objevuj\u00ed u n\u011bkter\u00fdch lehk\u00fdch nebo vysokorychlostn\u00edch aplikac\u00ed a nab\u00edzej\u00ed ni\u017e\u0161\u00ed hmotnost a lep\u0161\u00ed odvod tepla na jednotku plochy, ale ni\u017e\u0161\u00ed tuhost hlin\u00edku znamen\u00e1, \u017ee k dosa\u017een\u00ed stejn\u00e9 odolnosti proti pr\u016fhybu jsou zapot\u0159eb\u00ed siln\u011bj\u0161\u00ed st\u011bny \u2013 co\u017e \u010d\u00e1ste\u010dn\u011b neguje hmotnostn\u00ed v\u00fdhodu p\u0159i \u00farovn\u00edch kroutic\u00edho momentu typick\u00fdch pro pozemn\u00ed n\u00e1\u0159ad\u00ed.<\/p>\n

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\u2699\ufe0f Jak reduk\u010dn\u00ed pom\u011br ovliv\u0148uje chov\u00e1n\u00ed n\u00e1\u0159ad\u00ed<\/p>\n

Rota\u010dn\u00ed \u0159eza\u010dka s redukc\u00ed 1,47:1 (vstupn\u00ed ot\u00e1\u010dky 540 ot.\/min, v\u00fdstupn\u00ed ot\u00e1\u010dky 367 ot.\/min) vytv\u00e1\u0159\u00ed jemn\u00fd \u0159ez s vysokou rychlost\u00ed ot\u00e1\u010den\u00ed \u010depele, co\u017e je ide\u00e1ln\u00ed pro dokon\u010dovac\u00ed se\u010den\u00ed vylep\u0161en\u00fdch pastvin. Stejn\u00e1 \u0159eza\u010dka s redukc\u00ed 1,92:1 (vstupn\u00ed ot\u00e1\u010dky 540 ot.\/min, v\u00fdstupn\u00ed ot\u00e1\u010dky 281 ot.\/min) ob\u011btuje kvalitu \u0159ezu ve prosp\u011bch to\u010div\u00e9ho momentu, co\u017e j\u00ed umo\u017e\u0148uje pro\u0159ez\u00e1vat hust\u00e9 k\u0159ov\u00ed a stromky bez zastaven\u00ed. Volba reduk\u010dn\u00edho pom\u011bru je proto rozhodnut\u00edm o aplikaci, nikoli pouze mechanick\u00fdm \u2013 definuje schopnosti a omezen\u00ed n\u00e1\u0159ad\u00ed v ter\u00e9nu.<\/p>\n<\/div>\n

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Uvnit\u0159 zvy\u0161ova\u010de ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele: Obr\u00e1cen\u00fd tok v\u00fdkonu<\/h2>\n

Zvy\u0161ova\u010d ot\u00e1\u010dek pou\u017e\u00edv\u00e1 stejn\u00e9 typy ozuben\u00fdch kol jako reduktor \u2013 \u010deln\u00ed, spir\u00e1lov\u00e9 nebo planetov\u00e9 \u2013 ale obrac\u00ed pom\u011br toku v\u00fdkonu. Velk\u00e9, pomal\u00e9 ozuben\u00e9 kolo p\u0159ij\u00edm\u00e1 energii ze vstupu v\u00fdvodov\u00e9ho h\u0159\u00eddele a mal\u00e9, rychl\u00e9 ozuben\u00e9 kolo dod\u00e1v\u00e1 energii na v\u00fdstup. U spir\u00e1lov\u00e9 konstrukce s paraleln\u00edmi h\u0159\u00eddeli poh\u00e1n\u00ed vstup v\u00fdvodov\u00e9ho h\u0159\u00eddele velk\u00e9 spir\u00e1lov\u00e9 ozuben\u00e9 kolo, kter\u00e9 zab\u00edr\u00e1 s men\u0161\u00edm ozuben\u00fdm kolem na v\u00fdstupn\u00edm h\u0159\u00eddeli. Pom\u011br po\u010dtu zub\u016f je obr\u00e1cen\u00fd: reduktor by mohl pou\u017e\u00edt 48zubov\u00e9 kolo poh\u00e1n\u011bj\u00edc\u00ed 16zub\u00e9 kolo pro zv\u00fd\u0161en\u00ed ot\u00e1\u010dek 3:1 (a odpov\u00eddaj\u00edc\u00ed sn\u00ed\u017een\u00ed to\u010div\u00e9ho momentu 3:1).<\/p>\n

Konstruk\u010dn\u00ed v\u00fdzvy u zvy\u0161ova\u010d\u016f ot\u00e1\u010dek se li\u0161\u00ed od v\u00fdzev u reduktor\u016f v n\u011bkolika d\u016fle\u017eit\u00fdch ohledech. Zaprv\u00e9, v\u00fdstupn\u00ed h\u0159\u00eddel se ot\u00e1\u010d\u00ed rychleji ne\u017e vstupn\u00ed \u2013 \u010dasto dvakr\u00e1t a\u017e \u0161estkr\u00e1t rychleji. To znamen\u00e1, \u017ee v\u00fdstupn\u00ed lo\u017eiska mus\u00ed zvl\u00e1dat vy\u0161\u0161\u00ed ot\u00e1\u010dky, co\u017e zvy\u0161uje odst\u0159ediv\u00e9 zat\u00ed\u017een\u00ed valiv\u00fdch t\u011bles, generuje v\u00edce tepla ze smykov\u00e9ho nam\u00e1h\u00e1n\u00ed maziva a vy\u017eaduje men\u0161\u00ed v\u016fle lo\u017eisek. Lo\u017eisko s \u017eivotnost\u00ed 2 000 hodin p\u0159i 500 ot\/min m\u016f\u017ee p\u0159i stejn\u00e9m radi\u00e1ln\u00edm a axi\u00e1ln\u00edm zat\u00ed\u017een\u00ed vydr\u017eet pouze 800 hodin p\u0159i 2 500 ot\/min, proto\u017ee \u017eivotnost lo\u017eiska se s rostouc\u00edmi ot\u00e1\u010dkami sni\u017euje podle dob\u0159e zn\u00e1m\u00e9ho inverzn\u00edho vztahu.<\/p>\n

Za druh\u00e9, t\u011bsn\u011bn\u00ed v\u00fdstupn\u00edho h\u0159\u00eddele mus\u00ed pracovat p\u0159i vy\u0161\u0161\u00edch obvodov\u00fdch rychlostech. P\u0159i 3 000 ot\u00e1\u010dk\u00e1ch za minutu na h\u0159\u00eddeli o pr\u016fm\u011bru 40 mm se t\u011bsnic\u00ed b\u0159it klou\u017ee po povrchu h\u0159\u00eddele rychlost\u00ed 6,3 metru za sekundu. P\u0159i t\u011bchto rychlostech t\u011bsnic\u00ed b\u0159it generuje zna\u010dn\u00e9 t\u0159ec\u00ed teplo, kter\u00e9 \u010dasem tvrdne elastomer a nakonec zp\u016fsob\u00ed net\u011bsnost t\u011bsn\u011bn\u00ed. Vysokorychlostn\u00ed t\u011bsn\u011bn\u00ed pou\u017e\u00edvaj\u00ed materi\u00e1ly b\u0159it\u016f z PTFE (teflonu) nebo labyrintov\u00e9 t\u011bsn\u011bn\u00ed ke sn\u00ed\u017een\u00ed t\u0159en\u00ed a prodlou\u017een\u00ed \u017eivotnosti \u2013 co\u017e je detail, kter\u00fd odli\u0161uje komer\u010dn\u00ed p\u0159evodovky s v\u00fdvodov\u00fdm h\u0159\u00eddelem od ekonomick\u00fdch alternativ.<\/p>\n

Za t\u0159et\u00ed, po\u017eadavky na maz\u00e1n\u00ed se m\u011bn\u00ed p\u0159i vy\u0161\u0161\u00edch ot\u00e1\u010dk\u00e1ch. Ztr\u00e1ty m\u00edch\u00e1n\u00edm oleje se zvy\u0161uj\u00ed s druhou mocninou ot\u00e1\u010dek, co\u017e znamen\u00e1, \u017ee ozuben\u00e9 kolo ot\u00e1\u010dej\u00edc\u00ed se rychlost\u00ed 3 000 ot\/min generuje dev\u011btkr\u00e1t v\u011bt\u0161\u00ed ztr\u00e1ty m\u00edch\u00e1n\u00edm ne\u017e stejn\u00e9 ozuben\u00e9 kolo p\u0159i 1 000 ot\/min. Zvy\u0161ova\u010de ot\u00e1\u010dek to kompenzuj\u00ed pou\u017eit\u00edm ni\u017e\u0161\u00edch hladin oleje \u2013 pr\u00e1v\u011b tak, aby se pono\u0159ily zuby spodn\u00edho ozuben\u00e9ho kola \u2013 a spol\u00e9haj\u00ed se na rozst\u0159ik a sm\u011brovan\u00fd tok oleje z pono\u0159en\u00fdch ozuben\u00fdch kol k maz\u00e1n\u00ed horn\u00edch lo\u017eisek. N\u011bkter\u00e9 planetov\u00e9 zv\u00fd\u0161ova\u010de ot\u00e1\u010dek s vysok\u00fdm p\u0159evodov\u00fdm pom\u011brem pou\u017e\u00edvaj\u00ed nucen\u00e9 maz\u00e1n\u00ed s vnit\u0159n\u00edm trochoidn\u00edm \u010derpadlem poh\u00e1n\u011bn\u00fdm ozuben\u00fdm soukol\u00ed, aby se zajistilo dostate\u010dn\u00e9 dod\u00e1vky oleje do lo\u017eisek centr\u00e1ln\u00edho kola, kter\u00e1 jsou um\u00edst\u011bna uprost\u0159ed rotuj\u00edc\u00ed sestavy a v syst\u00e9mu s gravita\u010dn\u00edm nap\u00e1jen\u00edm dost\u00e1vaj\u00ed minim\u00e1ln\u00ed rozst\u0159ik.<\/p>\n

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\"Hydraulick\u00e1<\/div>\n

Hydraulick\u00e1 p\u0159evodovka pohonu \u2013 typick\u00e1 konfigurace zvy\u0161ova\u010de ot\u00e1\u010dek pou\u017e\u00edvan\u00e1 pro pohon \u010derpadla v hydraulick\u00fdch okruz\u00edch poh\u00e1n\u011bn\u00fdch v\u00fdvodov\u00fdm h\u0159\u00eddelem<\/p>\n<\/div>\n

<\/p>\n

P\u0159\u00edm\u00e9 srovn\u00e1n\u00ed: Reduktor vs. Zvy\u0161ova\u010d<\/h2>\n

N\u00e1sleduj\u00edc\u00ed tabulka shrnuje kl\u00ed\u010dov\u00e9 konstruk\u010dn\u00ed a aplika\u010dn\u00ed rozd\u00edly mezi reduktorem s v\u00fdvodov\u00fdm h\u0159\u00eddelem a p\u0159evodovkou se zvy\u0161ova\u010dem ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele. Pou\u017eijte ji jako rychlou pom\u016fcku pro v\u00fdb\u011br p\u0159i specifikaci nov\u00e9ho zem\u011bd\u011blsk\u00e1 p\u0159evodovka<\/a> pro n\u00e1vrh nebo v\u00fdm\u011bnu n\u00e1\u0159ad\u00ed.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parametr<\/th>\nReduktor v\u00fdvodov\u00e9ho h\u0159\u00eddele<\/th>\nZvy\u0161ova\u010d ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele<\/th>\n<\/tr>\n<\/thead>\n
V\u00fdstupn\u00ed rychlost vs. vstupn\u00ed<\/td>\nNi\u017e\u0161\u00ed (obvykle 1\/3 a\u017e 2\/3 ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele)<\/td>\nVy\u0161\u0161\u00ed (obvykle 2\u00d7 a\u017e 6\u00d7 ot\u00e1\u010dky v\u00fdvodov\u00e9ho h\u0159\u00eddele)<\/td>\n<\/tr>\n
V\u00fdstupn\u00ed to\u010div\u00fd moment vs. vstupn\u00ed<\/td>\nVy\u0161\u0161\u00ed (vyn\u00e1sobeno reduk\u010dn\u00edm pom\u011brem)<\/td>\nDoln\u00ed (d\u011bleno multiplika\u010dn\u00edm pom\u011brem)<\/td>\n<\/tr>\n
Typick\u00e1 konfigurace p\u0159evodovky<\/td>\nSpir\u00e1lov\u00e9 zkosen\u00ed (pravo\u00fahl\u00e9) nebo spir\u00e1lov\u00e9 rovnob\u011b\u017en\u00e9<\/td>\n\u0160roubovit\u00fd paraleln\u00ed, \u010deln\u00ed paraleln\u00ed nebo planetov\u00fd<\/td>\n<\/tr>\n
B\u011b\u017en\u00fd rozsah pom\u011br\u016f<\/td>\n1,2:1 a\u017e 3,5:1<\/td>\n1:2 a\u017e 1:6<\/td>\n<\/tr>\n
Kritick\u00e9 lo\u017eisko<\/td>\nV\u00fdstupn\u00ed h\u0159\u00eddel (vysok\u00fd to\u010div\u00fd moment, ni\u017e\u0161\u00ed ot\u00e1\u010dky)<\/td>\nV\u00fdstupn\u00ed h\u0159\u00eddel (vysok\u00e9 ot\u00e1\u010dky, radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed \u010derpadla)<\/td>\n<\/tr>\n
Prim\u00e1rn\u00ed re\u017eim selh\u00e1n\u00ed<\/td>\nKoroze zub\u016f ozuben\u00e9ho kola v d\u016fsledku r\u00e1zov\u00e9ho p\u0159et\u00ed\u017een\u00ed<\/td>\n\u00danava v\u00fdstupn\u00edho lo\u017eiska z trvale vysok\u00e9 rychlosti<\/td>\n<\/tr>\n
Mechanick\u00e1 \u00fa\u010dinnost<\/td>\n94%\u201397% (spir\u00e1lov\u00e9 zkosen\u00e9 jednostup\u0148ov\u00e9)<\/td>\n90%\u201397% (li\u0161\u00ed se podle typu a p\u0159evodov\u00e9ho pom\u011bru)<\/td>\n<\/tr>\n
V\u00fdzva k maz\u00e1n\u00ed<\/td>\nZaji\u0161t\u011bn\u00ed EP ochrany p\u0159i r\u00e1zov\u00e9m zat\u00ed\u017een\u00ed<\/td>\n\u0158\u00edzen\u00ed tepla z vysokorychlostn\u00edho stlouk\u00e1n\u00ed<\/td>\n<\/tr>\n
Typick\u00e9 aplikace<\/td>\nRota\u010dn\u00ed \u0159eza\u010dky, kultiv\u00e1tory, lisy, seka\u010dky, rozmetadla<\/td>\nPohony hydraulick\u00fdch \u010derpadel, gener\u00e1tory, odst\u0159ediv\u00e1 dmychadla<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

P\u0159izp\u016fsoben\u00ed aplikac\u00ed: Kter\u00e1 p\u0159evodovka pro kter\u00e9 n\u00e1\u0159ad\u00ed?<\/h2>\n

V\u00fdb\u011br mezi p\u0159evodovkou s p\u0159evodovkou a reduktorem za\u010d\u00edn\u00e1 jednou ot\u00e1zkou: pot\u0159ebuje n\u00e1\u0159ad\u00ed, aby se v\u00fdstupn\u00ed h\u0159\u00eddel ot\u00e1\u010dela pomaleji nebo rychleji ne\u017e v\u00fdvodov\u00fd h\u0159\u00eddel? Odpov\u011b\u010f je t\u00e9m\u011b\u0159 v\u017edy z\u0159ejm\u00e1, jakmile pochop\u00edte, co vy\u017eaduje pracovn\u00ed mechanismus n\u00e1\u0159ad\u00ed.<\/p>\n

\"Typ<\/p>\n

Pracovn\u00ed n\u00e1\u0159ad\u00ed pro pr\u00e1ci v ter\u00e9nu \u2192 Reduktor<\/h3>\n

Jak\u00fdkoli n\u00e1stroj, jeho\u017e pracovn\u00ed prvek se dot\u00fdk\u00e1 zem\u011b, plodiny nebo suti, pot\u0159ebuje vysok\u00fd to\u010div\u00fd moment k p\u0159ekon\u00e1n\u00ed odporu. Rota\u010dn\u00ed fr\u00e9zy ot\u00e1\u010dej\u00edc\u00ed se vysokou tr\u00e1vou a stromky, rota\u010dn\u00ed kultiv\u00e1tory pro\u0159ez\u00e1vaj\u00edc\u00ed zhutn\u011bnou p\u016fdu, cepov\u00e9 seka\u010dky drt\u00edc\u00ed d\u0159evnatou vegetaci a rypadla vrtaj\u00edc\u00ed do hl\u00edny \u2013 v\u0161echny tyto stroje se setk\u00e1vaj\u00ed s n\u00e1hl\u00fdmi v\u00fdkyvy odporu, kter\u00e9 by mohly zastavit vysokorychlostn\u00ed v\u00fdkon s n\u00edzk\u00fdm to\u010div\u00fdm momentem. Reduktor absorbuje tyto n\u00e1razy t\u00edm, \u017ee poskytuje rezervu to\u010div\u00e9ho momentu: n\u00e1soben\u00ed p\u0159evod\u016f zaji\u0161\u0165uje, \u017ee i kdy\u017e n\u00e1stroj naraz\u00ed na odpor vysoko nad sv\u00fdm ust\u00e1len\u00fdm zat\u00ed\u017een\u00edm, v\u00fdvodov\u00fd h\u0159\u00eddel a motor maj\u00ed d\u00edky p\u0159evodovce dostate\u010dnou mechanickou v\u00fdhodu, aby udr\u017eely v\u00fdstupn\u00ed h\u0159\u00eddel v ot\u00e1\u010den\u00ed.<\/p>\n

V r\u00e1mci kategorie reduktor\u016f mus\u00ed specifick\u00fd p\u0159evodov\u00fd pom\u011br odpov\u00eddat po\u017eadavk\u016fm dan\u00e9ho n\u00e1\u0159ad\u00ed. A p\u0159evodovka rota\u010dn\u00ed \u0159eza\u010dky<\/a> Obvykle pou\u017e\u00edv\u00e1 p\u0159evodov\u00e9 pom\u011bry mezi 1,47:1 a 1,92:1, co\u017e z v\u00fdvodov\u00e9ho h\u0159\u00eddele s ot\u00e1\u010dkami 540 ot.\/min. dosahuje v\u00fdstupn\u00edch ot\u00e1\u010dek 280 a\u017e 367 ot.\/min. P\u0159evodovka lisu na kulat\u00e9 bal\u00edky m\u016f\u017ee pou\u017e\u00edvat vy\u0161\u0161\u00ed p\u0159evod (2,5:1 a\u017e 3:1), proto\u017ee mechanismus pro vytv\u00e1\u0159en\u00ed bal\u00edk\u016f pot\u0159ebuje velmi vysok\u00fd to\u010div\u00fd moment ke stla\u010den\u00ed plodiny do t\u011bsn\u00e9ho v\u00e1lcov\u00e9ho obalu. P\u0159evodovka rota\u010dn\u00edho kultiv\u00e1toru pou\u017e\u00edv\u00e1 m\u00edrn\u00fd p\u0159evod (obvykle 1,6:1 a\u017e 2,5:1), kter\u00fd vyva\u017euje rychlost \u0161pi\u010dky no\u017ee pro efektivn\u00ed \u0159ez\u00e1n\u00ed p\u016fdy s dostate\u010dn\u00fdm to\u010div\u00fdm momentem pro zvl\u00e1dnut\u00ed ko\u0159enov\u00e9 hmoty a kamenit\u00e9 p\u016fdy.<\/p>\n

Pohony \u010derpadel a gener\u00e1tor\u016f \u2192 Zvy\u0161ova\u010d ot\u00e1\u010dek<\/h3>\n

Hydraulick\u00e1 \u010derpadla, odst\u0159ediv\u00e1 vodn\u00ed \u010derpadla, vzduchov\u00e9 kompresory a gener\u00e1tory poh\u00e1n\u011bn\u00e9 v\u00fdvodov\u00fdm h\u0159\u00eddelem maj\u00ed spole\u010dn\u00fd rys: jejich vnit\u0159n\u00ed komponenty jsou navr\u017eeny pro ot\u00e1\u010dky v\u00fdrazn\u011b vy\u0161\u0161\u00ed ne\u017e v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele traktoru. Zubov\u00e9 hydraulick\u00e9 \u010derpadlo produkuje p\u0159i 540 ot.\/min zanedbateln\u00fd pr\u016ftok \u2013 vnit\u0159n\u00ed v\u016fle, kter\u00e9 zaji\u0161\u0165uj\u00ed dostate\u010dn\u00e9 ut\u011bsn\u011bn\u00ed p\u0159i 2 000 ot.\/min, se p\u0159i 540 ot.\/min \u00fam\u011brn\u011b zv\u011bt\u0161\u00ed, co\u017e umo\u017e\u0148uje v\u011bt\u0161in\u011b vytla\u010den\u00e9 kapaliny prosakovat zp\u011bt p\u0159es konce ozuben\u00fdch kol. Provoz stejn\u00e9ho \u010derpadla p\u0159i jeho konstruk\u010dn\u00edch ot\u00e1\u010dk\u00e1ch 2 000+ ot.\/min pomoc\u00ed zvy\u0161ova\u010de ot\u00e1\u010dek eliminuje tuto ztr\u00e1tu \u00fa\u010dinnosti a produkuje jmenovit\u00fd pr\u016ftok.<\/p>\n

Gener\u00e1tory poh\u00e1n\u011bn\u00e9 v\u00fdvodov\u00fdm h\u0159\u00eddelem p\u0159edstavuj\u00ed zvl\u00e1\u0161tn\u00ed p\u0159\u00edpad, kdy v\u00fdstupn\u00ed ot\u00e1\u010dky mus\u00ed odpov\u00eddat pevn\u00e9 elektrick\u00e9 frekvenci. Na trz\u00edch s frekvenc\u00ed 50 Hz (v\u011bt\u0161ina Asie, Evropy a Oce\u00e1nie) se mus\u00ed gener\u00e1tor ot\u00e1\u010det p\u0159esn\u011b 1 500 ot\/min (pro 4p\u00f3lov\u00fd altern\u00e1tor) nebo 3 000 ot\/min (pro 2p\u00f3lov\u00fd altern\u00e1tor). V\u00fdvodov\u00fd h\u0159\u00eddel s 540 ot\/min poh\u00e1n\u011bj\u00edc\u00ed p\u0159evodn\u00edk ot\u00e1\u010dek s pom\u011brem 1:2,78 produkuje p\u0159esn\u011b 1 500 ot\/min \u2013 jak\u00e1koli zm\u011bna ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele se v\u0161ak p\u0159\u00edmo projev\u00ed na frekvenci gener\u00e1toru a zp\u016fsob\u00ed kol\u00eds\u00e1n\u00ed nap\u011bt\u00ed. Kvalita p\u0159evodn\u00edku ot\u00e1\u010dek p\u0159\u00edmo ovliv\u0148uje stabilitu elektrick\u00e9ho v\u00fdstupu v t\u011bchto aplikac\u00edch: nerovnosti v z\u00e1b\u011bru ozuben\u00fdch kol, h\u00e1zen\u00ed lo\u017eisek a vibrace sk\u0159\u00edn\u011b p\u0159isp\u00edvaj\u00ed k pulzac\u00edm ot\u00e1\u010dek, kter\u00e9 se st\u00e1vaj\u00ed frekven\u010dn\u00edm jitterem v elektrick\u00e9m v\u00fdstupu.<\/p>\n

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\n

\ud83d\udd3d<\/p>\n

Aplikace reduktor\u016f<\/p>\n

Rota\u010dn\u00ed \u0159eza\u010dky, cepov\u00e9 seka\u010dky, rota\u010dn\u00ed kultiv\u00e1tory, lisy na kulat\u00e9 bal\u00edky, rozmetadla hnojiv, rozmetadla hnoje, rypadla na sloupky, sn\u011bhov\u00e9 fr\u00e9zy, m\u00edcha\u010dky krmiva, rota\u010dn\u00ed shrnova\u010de<\/p>\n<\/div>\n

\n

\ud83d\udd3c<\/p>\n

Aplikace pro zv\u00fd\u0161en\u00ed<\/p>\n

Pohony hydraulick\u00fdch \u010derpadel, gener\u00e1tory s v\u00fdvodov\u00fdm h\u0159\u00eddelem, odst\u0159ediv\u00e1 vodn\u00ed \u010derpadla, vzduchov\u00e9 kompresory, odst\u0159ediv\u00e1 dmychadla, ventil\u00e1tory pro s\u00e1n\u00ed obil\u00ed, pohony altern\u00e1tor\u016f<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

P\u0159\u00edklady v\u00fdpo\u010dt\u016f s vyu\u017eit\u00edm \u0159e\u0161en\u00fdch postup\u016f<\/h2>\n

P\u0159\u00edklad 1: V\u00fdb\u011br reduktoru pro rota\u010dn\u00ed fr\u00e9zu<\/h3>\n

Rota\u010dn\u00ed \u0159eza\u010dka o pr\u016fm\u011bru 72 palc\u016f (183 cm) vy\u017eaduje pro efektivn\u00ed \u0159ez\u00e1n\u00ed sm\u00ed\u0161en\u00e9ho ke\u0159e o pr\u016fm\u011bru a\u017e 3 palce (72 palc\u016f) rychlost hrotu no\u017ee p\u0159ibli\u017en\u011b 68 m\/s. N\u016f\u017e m\u011b\u0159\u00ed od \u010depu k hrotu 27 palc\u016f (0,686 m). Rychlost hrotu se rovn\u00e1 \u03c0 \u00d7 pr\u016fm\u011br rotoru \u00d7 ot.\/min \u00f7 60. P\u0159i pr\u00e1ci vzad: 68 = \u03c0 \u00d7 (0,686 \u00d7 2) \u00d7 ot.\/min \u00f7 60, tak\u017ee ot.\/min = 68 \u00d7 60 \u00f7 (\u03c0 \u00d7 1,372) = 947 ot.\/min. Toto jsou ot\u00e1\u010dky rotoru pot\u0159ebn\u00e9 na \u0161pi\u010dk\u00e1ch no\u017e\u016f. Proto\u017ee v\u00fdstupn\u00ed h\u0159\u00eddel p\u0159evodovky je spojena s nosi\u010dem no\u017ee p\u0159\u00edm\u00fdm pohonem (bez mezilehl\u00e9ho \u0159emene nebo \u0159et\u011bzu), mus\u00ed se v\u00fdstupn\u00ed h\u0159\u00eddel p\u0159evodovky ot\u00e1\u010det rychlost\u00ed p\u0159ibli\u017en\u011b 947 ot.\/min.<\/p>\n

Po\u010dkejte \u2013 947 ot.\/min je v\u00edce ne\u017e u v\u00fdvodov\u00e9ho h\u0159\u00eddele s 540 ot.\/min. Znamen\u00e1 to, \u017ee pot\u0159ebujete zvy\u0161ova\u010d ot\u00e1\u010dek? Ne. U v\u011bt\u0161iny rota\u010dn\u00edch \u0159eza\u010dek je pr\u016fm\u011br nosi\u010de no\u017ee mnohem men\u0161\u00ed ne\u017e dosah no\u017ee od \u010depu k jeho \u0161pi\u010dce. Nosi\u010d no\u017ee (rotuj\u00edc\u00ed kotou\u010d) m\u00e1 pr\u016fm\u011br zhruba 26 palc\u016f; rozm\u011br 27 palc\u016f je vlastn\u00ed d\u00e9lka no\u017ee od jeho oto\u010dn\u00e9ho \u010depu k jeho \u0161pi\u010dce. Rychlost ot\u00e1\u010den\u00ed nosi\u010de no\u017ee, poh\u00e1n\u011bn\u00e1 v\u00fdstupem z p\u0159evodovky, je obvykle 300 a\u017e 400 ot.\/min. Vysok\u00e1 rychlost hrotu no\u017ee poch\u00e1z\u00ed z dlouh\u00e9ho ramene no\u017ee, nikoli z vysok\u00fdch ot\u00e1\u010dek h\u0159\u00eddele. Spr\u00e1vn\u00e1 p\u0159evodovka je tedy skute\u010dn\u011b reduktor: vstupn\u00ed pom\u011br 540 ot.\/min \u00f7 1,5:1 = v\u00fdstupn\u00ed 360 ot.\/min, co\u017e v kombinaci s geometri\u00ed no\u017ee vytv\u00e1\u0159\u00ed po\u017eadovanou rychlost hrotu no\u017ee. Tento p\u0159\u00edklad ilustruje, pro\u010d je pro v\u00fdb\u011br spr\u00e1vn\u00e9ho typu p\u0159evodovky nezbytn\u00e9 pochopen\u00ed mechanick\u00e9ho uspo\u0159\u00e1d\u00e1n\u00ed n\u00e1\u0159ad\u00ed \u2013 nejen jeho po\u017eadavk\u016f na rychlost.<\/p>\n

P\u0159\u00edklad 2: V\u00fdb\u011br zvy\u0161ova\u010de ot\u00e1\u010dek pro hydraulick\u00e9 \u010derpadlo<\/h3>\n

\u0160t\u00edpa\u010dka d\u0159eva poh\u00e1n\u011bn\u00e1 v\u00fdvodov\u00fdm h\u0159\u00eddelem pou\u017e\u00edv\u00e1 zubov\u00e9 \u010derpadlo o objemu 16 cm3\/ot. s ot\u00e1\u010dkami 2 200 ot.\/min., pracuj\u00edc\u00ed p\u0159i tlaku 180 bar\u016f a s pojistn\u00fdm ventilem nastaven\u00fdm na 210 bar\u016f. Traktor m\u00e1 v\u00fdvodov\u00fd h\u0159\u00eddel s ot\u00e1\u010dkami 540 ot.\/min. a v\u00fdkonem 35 HP (26,1 kW). Po\u017eadovan\u00fd p\u0159evodov\u00fd pom\u011br: 2 200 \u00f7 540 = zv\u00fd\u0161en\u00ed o 4,07:1. Vyberte nejbli\u017e\u0161\u00ed komer\u010dn\u00ed p\u0159evodov\u00fd pom\u011br vy\u0161\u0161\u00ed ne\u017e tento: 1:4,5, kter\u00fd produkuje 540 \u00d7 4,5 = 2 430 ot.\/min. \u2013 v r\u00e1mci jmenovit\u00e9ho rozsahu ot\u00e1\u010dek \u010derpadla, ale nep\u0159esahuj\u00edc\u00ed jeho maxim\u00e1ln\u00ed povolen\u00e9 ot\u00e1\u010dky (obvykle o 10% a\u017e 15% nad jmenovitou hodnotou).<\/p>\n

Teoretick\u00fd pr\u016ftok: 16 cm3\/ot. \u00d7 2 430 ot.\/min. \u00f7 1 000 = 38,9 l\/min. Pou\u017eijte objemovou \u00fa\u010dinnost 92%: skute\u010dn\u00fd pr\u016ftok 35,8 l\/min. Hydraulick\u00fd v\u00fdkon p\u0159i odleh\u010den\u00ed: 35,8 \u00d7 210 \u00f7 600 = 12,5 kW. P\u0159ipo\u010dt\u011bte ztr\u00e1ty v p\u0159evodovce (5% pro spir\u00e1lov\u00fd zvy\u0161ova\u010d ot\u00e1\u010dek): 12,5 \u00f7 0,95 = 13,2 kW po\u017eadavek na v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele. To je 13,2 \u00f7 26,1 = 50,6% dostupn\u00e9ho v\u00fdkonu v\u00fdvodov\u00e9ho h\u0159\u00eddele \u2013 co\u017e je v bezpe\u010dn\u00e9m provozn\u00edm rozsahu a ponech\u00e1v\u00e1 dostate\u010dnou rezervu pro p\u0159echodn\u00e9 p\u0159et\u00ed\u017een\u00ed, kdy\u017e \u0161t\u00edpac\u00ed kl\u00edn naraz\u00ed na uzel nebo p\u0159\u00ed\u010dn\u00fd odpor vl\u00e1ken.<\/p>\n

\"Sestava<\/div>\n

<\/p>\n

P\u011bt b\u011b\u017en\u00fdch chyb p\u0159i v\u00fdb\u011bru a jak se jim vyhnout<\/h2>\n

Po dvou desetilet\u00edch specifikace p\u0159evodovek PTO pro zem\u011bd\u011blsk\u00e9 a pr\u016fmyslov\u00e9 aplikace se ur\u010dit\u00e9 chyby objevuj\u00ed opakovan\u011b. Ka\u017ed\u00e1 z nich vede k p\u0159ed\u010dasn\u00e9mu selh\u00e1n\u00ed, \u0161patn\u00e9mu v\u00fdkonu nebo zbyte\u010dn\u00fdm n\u00e1klad\u016fm.<\/p>\n

Chyba 1: V\u00fdb\u011br p\u0159evodovky pouze podle v\u00fdkonu.<\/strong> V\u00fdkon je sou\u010dinem to\u010div\u00e9ho momentu a ot\u00e1\u010dek. P\u0159evodovka \u201es v\u00fdkonem 50 HP\u201c v p\u0159evodov\u00e9m pom\u011bru 1:3 zvl\u00e1d\u00e1 zcela jin\u00fd to\u010div\u00fd moment ne\u017e stejn\u00e1 p\u0159evodovka v p\u0159evodov\u00e9m pom\u011bru 1:1,5 \u2013 to\u010div\u00fd moment na v\u00fdstupn\u00edm h\u0159\u00eddeli se zdvojn\u00e1sob\u00ed, kdy\u017e zdvojn\u00e1sob\u00edte reduk\u010dn\u00ed pom\u011br pro stejn\u00fd v\u00fdkon v kon\u00edch. V\u017edy ov\u011b\u0159te jmenovit\u00fd to\u010div\u00fd moment p\u0159i konkr\u00e9tn\u00edm p\u0159evodov\u00e9m pom\u011bru, kter\u00fd chcete pou\u017e\u00edt, nikoli maxim\u00e1ln\u00ed v\u00fdkon v kon\u00edch na typov\u00e9m \u0161t\u00edtku.<\/p>\n

Chyba 2: Pou\u017eit\u00ed v\u00fdvodov\u00e9ho h\u0159\u00eddele s 540 ot.\/min. s p\u0159evodovkou s vysok\u00fdm p\u0159evodov\u00fdm pom\u011brem, kdy\u017e je k dispozici v\u00fdvodov\u00fd h\u0159\u00eddel s 1 000 ot.\/min.<\/strong> Jak je uvedeno v na\u0161em \u010dl\u00e1nku o V\u00fdvodov\u00fd h\u0159\u00eddel<\/a> V r\u016fzn\u00fdch konfigurac\u00edch p\u0159en\u00e1\u0161\u00ed v\u00fdvodov\u00fd h\u0159\u00eddel s 540 ot.\/min. dvojn\u00e1sobn\u00fd to\u010div\u00fd moment oproti v\u00fdvodov\u00e9mu h\u0159\u00eddeli s 1 000 ot.\/min. p\u0159i stejn\u00e9 \u00farovni v\u00fdkonu. Zvy\u0161ova\u010d ot\u00e1\u010dek s vysok\u00fdm p\u0159evodov\u00fdm pom\u011brem u v\u00fdvodov\u00e9ho h\u0159\u00eddele s 540 ot.\/min. soust\u0159ed\u00ed extr\u00e9mn\u00ed to\u010div\u00fd moment na vstupn\u00ed dr\u00e1\u017eku a zuby prvn\u00edho stupn\u011b. P\u0159epnut\u00ed na v\u00fdvodov\u00fd h\u0159\u00eddel s 1 000 ot.\/min. s ni\u017e\u0161\u00edm p\u0159evodov\u00fdm pom\u011brem vede k stejn\u00fdm v\u00fdstupn\u00edm ot\u00e1\u010dk\u00e1m p\u0159i polovi\u010dn\u00edm vstupn\u00edm to\u010div\u00e9m momentu, co\u017e prodlu\u017euje \u017eivotnost v\u0161ech sou\u010d\u00e1st\u00ed hnac\u00edho \u00fastroj\u00ed.<\/p>\n

Chyba 3: Ignorov\u00e1n\u00ed pracovn\u00edho cyklu.<\/strong> P\u0159evodovka s jmenovit\u00fdm v\u00fdkonem \u201e50 HP p\u0159eru\u0161ovan\u00fd provoz\u201c nem\u016f\u017ee udr\u017eet v\u00fdkon 50 HP po dobu 8 hodin nep\u0159etr\u017eit\u011b. Zem\u011bd\u011blsk\u00e9 reduktory poh\u00e1n\u011bj\u00edc\u00ed rota\u010dn\u00ed \u0159eza\u010dky pracuj\u00ed v p\u0159irozen\u00e9m p\u0159eru\u0161ovan\u00e9m cyklu \u2013 vysok\u00e9 zat\u00ed\u017een\u00ed b\u011bhem \u0159ezn\u00fdch pr\u016fchod\u016f, t\u00e9m\u011b\u0159 nulov\u00e9 zat\u00ed\u017een\u00ed b\u011bhem ot\u00e1\u010den\u00ed. Zvy\u0161ova\u010de ot\u00e1\u010dek poh\u00e1n\u011bj\u00edc\u00ed hydraulick\u00e1 \u010derpadla pracuj\u00ed nep\u0159etr\u017eit\u011b p\u0159i t\u00e9m\u011b\u0159 jmenovit\u00e9m zat\u00ed\u017een\u00ed. Ujist\u011bte se, \u017ee jmenovit\u00fd v\u00fdkon p\u0159evodovky odpov\u00edd\u00e1 pracovn\u00edmu cyklu aplikace: p\u0159eru\u0161ovan\u00fd (S3), kr\u00e1tkodob\u00fd (S2) nebo nep\u0159etr\u017eit\u00fd (S1).<\/p>\n

Chyba 4: Zanedb\u00e1n\u00ed radi\u00e1ln\u00edho zat\u00ed\u017een\u00ed od uchycen\u00ed \u010derpadla.<\/strong> Kdy\u017e t\u011b\u017ek\u00e9 hydraulick\u00e9 \u010derpadlo vis\u00ed z v\u00fdstupn\u00ed p\u0159\u00edruby p\u0159evodovky, hmotnost \u010derpadla vytv\u00e1\u0159\u00ed statick\u00e9 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed v\u00fdstupn\u00edho lo\u017eiska \u2013 a to nav\u00edc k dynamick\u00e9mu radi\u00e1ln\u00edmu zat\u00ed\u017een\u00ed od vnit\u0159n\u00edch tlakov\u00fdch sil \u010derpadla. Katalogy p\u0159evodovek, kter\u00e9 uv\u00e1d\u011bj\u00ed pouze jmenovit\u00e9 kroutic\u00ed momenty, nemus\u00ed toto kombinovan\u00e9 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed zohled\u0148ovat. Uve\u010fte jednotku s v\u00fdstupn\u00edmi lo\u017eisky dimenzovan\u00fdmi jak na vypo\u010d\u00edtan\u00fd kroutic\u00ed moment, tak na kombinovan\u00e9 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed od hmotnosti \u010derpadla a hydraulick\u00fdch reak\u010dn\u00edch sil.<\/p>\n

Chyba 5: P\u0159edimenzov\u00e1n\u00ed \u201ejen pro jistotu\u201c.<\/strong> Nadm\u011brn\u011b naddimenzovan\u00fd reduktor se jev\u00ed jako konzervativn\u00ed volba, ale vytv\u00e1\u0159\u00ed si sv\u00e9 vlastn\u00ed probl\u00e9my. P\u0159evodovka pracuj\u00edc\u00ed na 20% jmenovit\u00e9ho v\u00fdkonu generuje tak m\u00e1lo vnit\u0159n\u00edho tepla, \u017ee se vlhkost z kondenzace z oleje nikdy neodpa\u0159\u00ed \u2013 p\u0159evodovka pracuje trvale ve stavu \u201estuden\u00e9 vody\u201c, kter\u00fd podporuje vnit\u0159n\u00ed korozi, zejm\u00e9na na p\u0159esn\u011b brou\u0161en\u00fdch povr\u0161\u00edch zub\u016f ozuben\u00fdch kol. Probl\u00e9m s kondenzac\u00ed je nejhor\u0161\u00ed v podneb\u00ed s vysokou vlhkost\u00ed a velk\u00fdmi denn\u00edmi a no\u010dn\u00edmi teplotn\u00edmi v\u00fdkyvy. Spr\u00e1vn\u011b dimenzovan\u00e1 p\u0159evodovka, kter\u00e1 pracuje na 50% a\u017e 75% trval\u00e9ho v\u00fdkonu, se dostate\u010dn\u011b zah\u0159\u00edv\u00e1, aby odvedla kondenzaci, a z\u00e1rove\u0148 si zachovala pohodlnou bezpe\u010dnostn\u00ed rezervu pro \u0161pi\u010dkov\u00e9 zat\u00ed\u017een\u00ed.<\/p>\n

<\/p>\n

Kombinovan\u00e9 jednotky: P\u0159evodovky s ob\u011bma funkcemi<\/h2>\n

N\u011bkter\u00e9 zem\u011bd\u011blsk\u00e9 stroje pot\u0159ebuj\u00ed v r\u00e1mci jednoho stroje jak sn\u00ed\u017een\u00ed, tak i zv\u00fd\u0161en\u00ed rychlosti. Nap\u0159\u00edklad samoj\u00edzdn\u00e1 \u0159eza\u010dka pou\u017e\u00edv\u00e1 reduktor k pohonu \u0159ezac\u00ed hlavy s vysok\u00fdm to\u010div\u00fdm momentem a n\u00edzkou rychlost\u00ed a z\u00e1rove\u0148 pou\u017e\u00edv\u00e1 zvy\u0161ova\u010d rychlosti k pohonu hydraulick\u00e9ho \u010derpadla, kter\u00e9 poh\u00e1n\u00ed obvody pro ot\u00e1\u010den\u00ed pod\u00e1vac\u00edho v\u00e1lce a v\u00fdlevky. M\u00edsto mont\u00e1\u017ee dvou samostatn\u00fdch p\u0159evodovek n\u011bkte\u0159\u00ed v\u00fdrobci origin\u00e1ln\u00edho vybaven\u00ed specifikuj\u00ed kombinovanou jednotku \u2013 jednu sk\u0159\u00ed\u0148 s v\u00edce v\u00fdstupn\u00edmi h\u0159\u00eddeli pracuj\u00edc\u00edmi s r\u016fzn\u00fdmi p\u0159evodov\u00fdmi pom\u011bry ze spole\u010dn\u00e9ho vstupu.<\/p>\n

Tyto kombinovan\u00e9 jednotky jsou sice slo\u017eit\u011bj\u0161\u00ed na v\u00fdrobu, ale nab\u00edzej\u00ed zna\u010dn\u00e9 v\u00fdhody v p\u0159esnosti souososti (v\u0161echny h\u0159\u00eddele jsou um\u00edst\u011bny pomoc\u00ed stejn\u00e9ho odlitku) a kompaktnosti (\u017e\u00e1dn\u00e9 extern\u00ed konzoly nebo spojky mezi samostatn\u00fdmi p\u0159evodovkami). P\u0159evodovka Ever-Power PTO<\/a> T\u00fdm in\u017een\u00fdr\u016f pravideln\u011b navrhuje zak\u00e1zkov\u00e9 kombinovan\u00e9 jednotky pro z\u00e1kazn\u00edky OEM, kte\u0159\u00ed pot\u0159ebuj\u00ed ob\u011b funkce v jednom, prostorov\u011b \u00fasporn\u00e9m balen\u00ed \u2013 kontaktujte n\u00e1s<\/a> prodiskutovat po\u017eadavky va\u0161\u00ed \u017e\u00e1dosti.<\/p>\n

P\u0159i posuzov\u00e1n\u00ed, zda je kombinovan\u00e1 jednotka vhodn\u00e1 pro va\u0161i aplikaci, zva\u017ete tepelnou interakci mezi ob\u011bma v\u00fdstupn\u00edmi cestami. Reduktor s vysok\u00fdm to\u010div\u00fdm momentem a n\u00edzkou rychlost\u00ed generuje teplo prim\u00e1rn\u011b z t\u0159en\u00ed v z\u00e1b\u011bru ozuben\u00fdch kol, zat\u00edmco reduktor s vysokou rychlost\u00ed generuje teplo z t\u0159en\u00ed a t\u0159en\u00ed lo\u017eisek. Oba zdroje tepla oh\u0159\u00edvaj\u00ed sd\u00edlen\u00fd objem oleje. Pokud kombinovan\u00fd generovan\u00fd teplo p\u0159ekro\u010d\u00ed kapacitu rozptylu sk\u0159\u00edn\u011b, sd\u00edlen\u00fd olej se p\u0159eh\u0159\u00edv\u00e1 \u2013 co\u017e m\u016f\u017ee v\u00e9st ke sn\u00ed\u017een\u00ed v\u00fdkonu obou v\u00fdstupn\u00edch cest sou\u010dasn\u011b. Spr\u00e1vn\u00e1 tepeln\u00e1 anal\u00fdza b\u011bhem f\u00e1ze n\u00e1vrhu zaji\u0161\u0165uje, \u017ee plocha sk\u0159\u00edn\u011b a objem oleje kombinovan\u00e9 jednotky zvl\u00e1dnou celkov\u00e9 tepeln\u00e9 zat\u00ed\u017een\u00ed za v\u0161ech provozn\u00edch podm\u00ednek.<\/p>\n

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

P\u0159ehled typ\u016f p\u0159evodovek PTO \u2013 reduktory a zvy\u0161ova\u010de ot\u00e1\u010dek slou\u017e\u00ed z\u00e1sadn\u011b odli\u0161n\u00fdm po\u017eadavk\u016fm aplikac\u00ed<\/p>\n<\/div>\n

<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
\n
\nM\u016f\u017ee jedna p\u0159evodovka fungovat z\u00e1rove\u0148 jako zvy\u0161ova\u010d rychlosti i jako reduktor?
\n+<\/span><\/summary>\n
\n

Ne obr\u00e1cen\u00edm spojen\u00ed. I kdy\u017e ozuben\u00e1 kola mohou fyzicky p\u0159en\u00e1\u0161et v\u00fdkon v obou sm\u011brech, lo\u017eiska, t\u011bsn\u011bn\u00ed a mazac\u00ed syst\u00e9m jsou optimalizov\u00e1ny pro jeden provozn\u00ed re\u017eim. V\u00fdstupn\u00ed lo\u017eiska reduktoru jsou vybr\u00e1na pro vysok\u00fd to\u010div\u00fd moment a n\u00edzk\u00e9 ot\u00e1\u010dky; jejich provoz p\u0159i zv\u00fd\u0161en\u00e9 rychlosti v obr\u00e1cen\u00e9 konfiguraci zp\u016fsobuje p\u0159ed\u010dasnou \u00fanavu materi\u00e1lu. Pro aplikace, kter\u00e9 vy\u017eaduj\u00ed ob\u011b funkce, existuj\u00ed kombinovan\u00e9 jednotky se samostatn\u00fdmi v\u00fdstupn\u00edmi cestami, ale ty jsou \u00fa\u010delov\u011b konstruov\u00e1ny s vhodn\u00fdmi lo\u017eisky a t\u011bsn\u011bn\u00edm na ka\u017ed\u00e9m v\u00fdstupn\u00edm h\u0159\u00eddeli.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nCo se stane, kdy\u017e p\u0159ipoj\u00edm zrychlova\u010d k n\u00e1\u0159ad\u00ed, kter\u00e9 pot\u0159ebuje reduktor?
\n+<\/span><\/summary>\n
\n

Pracovn\u00ed mechanismus n\u00e1\u0159ad\u00ed by se ot\u00e1\u010del p\u0159\u00edli\u0161 rychle s p\u0159\u00edli\u0161 mal\u00fdm to\u010div\u00fdm momentem. U rota\u010dn\u00ed \u0159eza\u010dky by nosi\u010d no\u017e\u016f dos\u00e1hl nebezpe\u010dn\u00fdch rychlost\u00ed, kter\u00e9 by mohly vymr\u0161tit \u00falomky no\u017e\u016f, pokud by se p\u0159etrhl \u0161roub, a z\u00e1rove\u0148 by postr\u00e1dal to\u010div\u00fd moment k pro\u0159\u00edznut\u00ed jak\u00e9koli v\u00fdznamn\u011bj\u0161\u00ed vegetace \u2013 motor by se zastavil na prvn\u00edm hust\u00e9m v\u00fdb\u011b\u017eku. U kultiv\u00e1toru by no\u017ee rozdrtily pouze horn\u00ed centimetr p\u016fdy, ani\u017e by m\u011bly s\u00edlu proniknout hloub\u011bji. V obou p\u0159\u00edpadech tak\u00e9 riskujete p\u0159et\u00ed\u017een\u00ed vlastn\u00edch lo\u017eisek a h\u0159\u00eddele n\u00e1\u0159ad\u00ed, kter\u00e9 jsou navr\u017eeny pro ni\u017e\u0161\u00ed ot\u00e1\u010dky reduktoru.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nOpot\u0159ebov\u00e1vaj\u00ed se zvy\u0161ova\u010de rychlosti rychleji ne\u017e reduktory?
\n+<\/span><\/summary>\n
\n

Nen\u00ed to inherentn\u011b, ale \u010del\u00ed odli\u0161n\u00fdm mechanism\u016fm opot\u0159eben\u00ed. Reduktory v zem\u011bd\u011blsk\u00fdch aplikac\u00edch trp\u00ed p\u0159edev\u0161\u00edm po\u0161kozen\u00edm povrchu zub\u016f v d\u016fsledku r\u00e1zov\u00e9ho zat\u00ed\u017een\u00ed \u2013 d\u016flkovou koroz\u00ed, odlupov\u00e1n\u00edm a mikroprask\u00e1n\u00edm v d\u016fsledku n\u00e1raz\u016f. Zvy\u0161ova\u010de ot\u00e1\u010dek trp\u00ed p\u0159edev\u0161\u00edm \u00fanavou lo\u017eisek a opot\u0159eben\u00edm t\u011bsn\u011bn\u00ed v d\u016fsledku vy\u0161\u0161\u00edch ot\u00e1\u010dek v\u00fdstupn\u00edho h\u0159\u00eddele. Dob\u0159e navr\u017een\u00fd zvy\u0161ova\u010d ot\u00e1\u010dek s vhodn\u00fdmi vysokorychlostn\u00edmi lo\u017eisky a v\u00fdstupn\u00edmi t\u011bsn\u011bn\u00edmi z PTFE, provozovan\u00fd v r\u00e1mci sv\u00fdch tepeln\u00fdch limit\u016f, m\u016f\u017ee dos\u00e1hnout \u017eivotnosti lo\u017eiska srovnateln\u00e9 s reduktorem provozovan\u00fdm v r\u00e1mci sv\u00fdch limit\u016f r\u00e1zov\u00e9ho zat\u00ed\u017een\u00ed. Discipl\u00edna v \u00fadr\u017eb\u011b je d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e typ p\u0159evodovky: bu\u010f jednotka p\u0159ed\u010dasn\u011b sel\u017ee, kdy\u017e se zanedb\u00e1 v\u00fdm\u011bna oleje, nebo se do sk\u0159\u00edn\u011b dostanou ne\u010distoty.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nJak\u00fd je nej\u00fa\u010dinn\u011bj\u0161\u00ed typ p\u0159evodu pro zvy\u0161ov\u00e1n\u00ed ot\u00e1\u010dek v\u00fdvodov\u00e9ho h\u0159\u00eddele?
\n+<\/span><\/summary>\n
\n

\u0160roubov\u00e1 ozuben\u00e1 kola s rovnob\u011b\u017en\u00fdmi h\u0159\u00eddeli poskytuj\u00ed nejlep\u0161\u00ed kombinaci \u00fa\u010dinnosti a plynul\u00e9ho chodu pro p\u0159evodov\u00e9 pom\u011bry a\u017e do p\u0159ibli\u017en\u011b 1:4. Ka\u017ed\u00fd stupe\u0148 dosahuje \u00fa\u010dinnosti 97% a\u017e 98% a postupn\u00fd z\u00e1b\u011br zub\u016f minimalizuje torzn\u00ed vibrace p\u0159en\u00e1\u0161en\u00e9 na \u010derpadlo. Pro p\u0159evodov\u00e9 pom\u011bry nad 1:4 se planetov\u00e1 soukol\u00ed st\u00e1vaj\u00ed \u00fa\u010dinn\u011bj\u0161\u00edmi, proto\u017ee rozd\u011bluj\u00ed zat\u00ed\u017een\u00ed mezi v\u00edce planetov\u00fdch kol, \u010d\u00edm\u017e sni\u017euj\u00ed s\u00edly z\u00e1b\u011bru na jednotliv\u00e9 zuby a dosahuj\u00ed \u00fa\u010dinnosti 95% a\u017e 96% v jednom stupni, co\u017e by u rovnob\u011b\u017en\u00e9ho ozuben\u00ed vy\u017eadovalo dva stupn\u011b. \u010celn\u00ed ozuben\u00e1 kola jsou nejlevn\u011bj\u0161\u00ed, ale nejhlu\u010dn\u011bj\u0161\u00ed a nejm\u00e9n\u011b \u00fa\u010dinn\u00e1 kv\u016fli jejich n\u00e1hl\u00e9mu vzoru z\u00e1b\u011bru zub\u016f.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nJak vypo\u010d\u00edt\u00e1m po\u017eadovan\u00fd to\u010div\u00fd moment pro mou p\u0159evodovku?
\n+<\/span><\/summary>\n
\n

Pro reduktor: V\u00fdstupn\u00ed to\u010div\u00fd moment (Nm) = (v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele ve wattech \u00f7 v\u00fdstupn\u00ed ot\u00e1\u010dky v rad\/s) \u00d7 reduk\u010dn\u00ed pom\u011br \u00d7 servisn\u00ed faktor. Servisn\u00ed faktor zohled\u0148uje r\u00e1zov\u00e9 zat\u00ed\u017een\u00ed \u2013 pou\u017eijte 1,5 pro rovnom\u011brn\u00e9 zat\u00ed\u017een\u00ed (gener\u00e1tory), 2,0 pro st\u0159edn\u00ed r\u00e1zy (kyp\u0159i\u010de, seka\u010dky) a 2,5 a\u017e 3,0 pro siln\u00e9 r\u00e1zy (fr\u00e9zy na pa\u0159ezy, za\u0159\u00edzen\u00ed pro odstra\u0148ov\u00e1n\u00ed kamen\u016f). Pro reduktor: V\u00fdstupn\u00ed to\u010div\u00fd moment = v\u00fdkon v\u00fdvodov\u00e9ho h\u0159\u00eddele \u00f7 v\u00fdstupn\u00ed ot\u00e1\u010dky. Proto\u017ee v\u00fdstupn\u00ed ot\u00e1\u010dky jsou vy\u0161\u0161\u00ed, je v\u00fdstupn\u00ed to\u010div\u00fd moment ni\u017e\u0161\u00ed, ale mus\u00edte tak\u00e9 zohlednit radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed v\u00fdstupn\u00edho lo\u017eiska \u010derpadlem \u2013 k vypo\u010d\u00edtan\u00e9mu to\u010div\u00e9mu momentu p\u0159i\u010dt\u011bte 15% k 25%, abyste pokryli toto dodate\u010dn\u00e9 zat\u00ed\u017een\u00ed lo\u017eiska.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\nJe mo\u017en\u00e9 na stejn\u00e9 p\u0159evodovce p\u0159ep\u00ednat mezi 540 a 1 000 ot.\/min?
\n+<\/span><\/summary>\n
\n

Samotn\u00e1 p\u0159evodovka se nestar\u00e1 o vstupn\u00ed ot\u00e1\u010dky \u2013 jednodu\u0161e pou\u017eije sv\u016fj pevn\u00fd p\u0159evod. Zvy\u0161ova\u010d ot\u00e1\u010dek 1:3 produkuje 1 620 ot.\/min z v\u00fdvodov\u00e9ho h\u0159\u00eddele s 540 ot.\/min nebo 3 000 ot.\/min z v\u00fdvodov\u00e9ho h\u0159\u00eddele s 1 000 ot.\/min. Omezuj\u00edc\u00edm faktorem je fyzick\u00e9 p\u0159ipojen\u00ed: v\u00fdvodov\u00e9 h\u0159\u00eddele s 540 ot.\/min pou\u017e\u00edvaj\u00ed 6dr\u00e1\u017ekov\u00fd h\u0159\u00eddel o pr\u016fm\u011bru 1-3\/8 palce, zat\u00edmco v\u00fdvodov\u00e9 h\u0159\u00eddele s 1 000 ot.\/min pou\u017e\u00edvaj\u00ed 21dr\u00e1\u017ekov\u00fd h\u0159\u00eddel o pr\u016fm\u011bru 1-3\/8 palce. Pro p\u0159ep\u00edn\u00e1n\u00ed mezi ot\u00e1\u010dkami v\u00fdvodov\u00e9ho h\u0159\u00eddele byste museli vym\u011bnit adapt\u00e9r vstupn\u00edho dr\u00e1\u017ekov\u00e1n\u00ed (nebo celou sestavu vstupn\u00edho h\u0159\u00eddele) a mus\u00edte ov\u011b\u0159it, zda v\u00fdstupn\u00ed ot\u00e1\u010dky p\u0159i nov\u00fdch vstupn\u00edch ot\u00e1\u010dk\u00e1ch nep\u0159ekra\u010duj\u00ed maxim\u00e1ln\u00ed povolen\u00e9 ot\u00e1\u010dky \u010derpadla nebo n\u00e1\u0159ad\u00ed.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

<\/p>\n

\n

Pot\u0159ebujete pomoc s v\u00fdb\u011brem mezi zrychlova\u010dem a reduktorem?<\/h2>\n

Za\u0161lete n\u00e1m podrobnosti o va\u0161\u00ed aplikaci \u2013 ot\u00e1\u010dky v\u00fdvodov\u00e9ho h\u0159\u00eddele, typ n\u00e1\u0159ad\u00ed a po\u017eadavky na v\u00fdkon \u2013 a n\u00e1\u0161 technick\u00fd t\u00fdm v\u00e1m doporu\u010d\u00ed p\u0159esn\u00fd p\u0159evodov\u00fd pom\u011br, typ p\u0159evodov\u00e9ho stupn\u011b a konfiguraci mont\u00e1\u017ee, kter\u00e9 budou odpov\u00eddat va\u0161emu syst\u00e9mu. K dispozici je v\u00edce ne\u017e 500 model\u016f zem\u011bd\u011blsk\u00fdch p\u0159evodovek s okam\u017eitou specifikac\u00ed.<\/p>\n

Kontaktujte na\u0161e in\u017een\u00fdry<\/a><\/p>\n<\/div>\n

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

Zvy\u0161ova\u010d ot\u00e1\u010dek PTO vs. reduktor p\u0159evodu: Kdy pou\u017e\u00edt kter\u00fd z nich P\u0159edstavte si syst\u00e9m p\u0159evod\u016f j\u00edzdn\u00edho kola: n\u00edzk\u00fd p\u0159evodov\u00fd stupe\u0148 zn\u00e1sobuje s\u00edlu \u0161lap\u00e1n\u00ed p\u0159i stoup\u00e1n\u00ed do kopce na \u00fakor ot\u00e1\u010dek kola, zat\u00edmco vysok\u00fd p\u0159evodov\u00fd stupe\u0148 zn\u00e1sobuje rychlost kola na rovn\u00fdch silnic\u00edch na \u00fakor to\u010div\u00e9ho momentu nohou. P\u0159evodovka PTO d\u011bl\u00e1 p\u0159esn\u011b tot\u00e9\u017e \u2013 a [\u2026]<\/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-1217","post","type-post","status-publish","format-standard","hentry","category-agricultural-gearbox"],"_links":{"self":[{"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/posts\/1217","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=1217"}],"version-history":[{"count":2,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/posts\/1217\/revisions"}],"predecessor-version":[{"id":1219,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/posts\/1217\/revisions\/1219"}],"wp:attachment":[{"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/media?parent=1217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/categories?post=1217"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pto-gearbox.net\/cs\/wp-json\/wp\/v2\/tags?post=1217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}