{"id":3349,"date":"2026-05-14T05:11:21","date_gmt":"2026-05-14T05:11:21","guid":{"rendered":"https:\/\/sprocket-chain.net\/?p=3349"},"modified":"2026-05-14T05:11:21","modified_gmt":"2026-05-14T05:11:21","slug":"drive-chain-selection-how-engineers-choose-the-right-chain-for-any-application","status":"publish","type":"post","link":"https:\/\/sprocket-chain.net\/cs\/drive-chain-selection-how-engineers-choose-the-right-chain-for-any-application\/","title":{"rendered":"V\u00fdb\u011br hnac\u00edho \u0159et\u011bzu: Jak in\u017een\u00fd\u0159i vyb\u00edraj\u00ed spr\u00e1vn\u00fd \u0159et\u011bz pro jakoukoli aplikaci"},"content":{"rendered":"
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Technick\u00e1 reference \u00b7 P\u0159enos v\u00fdkonu<\/span><\/p>\n

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V\u00fdb\u011br hnac\u00edho \u0159et\u011bzu: Jak in\u017een\u00fd\u0159i vyb\u00edraj\u00ed spr\u00e1vn\u00fd \u0159et\u011bz pro jakoukoli aplikaci<\/h1>\n

V\u011bt\u0161ina poruch hnac\u00edho \u0159et\u011bzu m\u00e1 p\u016fvod v procesu v\u00fdb\u011bru, p\u0159i kter\u00e9m byl na nespr\u00e1vnou prom\u011bnnou pou\u017eit spr\u00e1vn\u00fd vzorec. Tato p\u0159\u00edru\u010dka popisuje kompletn\u00ed \u010dty\u0159krokovou metodu v\u00fdb\u011bru \u2013 od korigovan\u00e9ho konstruk\u010dn\u00edho v\u00fdkonu a\u017e po typ maz\u00e1n\u00ed \u2013 a b\u011b\u017en\u00e9 p\u0159edpoklady, kter\u00e9 ka\u017ed\u00fd krok zneplat\u0148uj\u00ed.<\/p>\n

Ov\u011b\u0159te si v\u00fdb\u011br \u0159et\u011bzu s na\u0161imi techniky<\/a><\/p>\n<\/div>\n<\/div>\n

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V\u00fdrobn\u00ed in\u017een\u00fdr v korejsk\u00e9 pr\u016fmyslov\u00e9 pek\u00e1rn\u011b specifikoval n\u00e1hradu za ne\u00fasp\u011b\u0161n\u00fd hnac\u00ed \u0159et\u011bz<\/strong> na pohonu hn\u011bta\u010de t\u011bsta. Vzala si \u0161t\u00edtek motoru \u2013 7,5 kW p\u0159i 1 450 ot.\/min \u2013 pou\u017eila servisn\u00ed faktor ANSI 1,3 pro m\u00edrn\u00e9 r\u00e1zy, na\u0161la vhodn\u00fd \u0159et\u011bz v tabulce pro v\u00fdb\u011br a objednala ho. N\u00e1hrada selhala na stejn\u00e9m m\u00edst\u011b po 1 100 hodin\u00e1ch, co\u017e t\u00e9m\u011b\u0159 p\u0159esn\u011b odpov\u00edd\u00e1 \u017eivotnosti origin\u00e1lu. V\u00fdb\u011br \u0159et\u011bzu byl technicky spr\u00e1vn\u00fd pro standardn\u00ed aplikaci se m\u00edrn\u00fdmi r\u00e1zy. Nezohled\u0148oval v\u0161ak, \u017ee hn\u011bta\u010d t\u011bsta se t\u0159ikr\u00e1t za sm\u011bnu spou\u0161t\u00ed p\u0159i pln\u00e9m zat\u00ed\u017een\u00ed \u2013 studen\u00e9, tuh\u00e9 t\u011bsto \u2013 a ka\u017ed\u00fd spou\u0161t\u011bc\u00ed moment dosahuje vrcholu p\u0159ibli\u017en\u011b 4n\u00e1sobku provozn\u00edho momentu po dobu prvn\u00edch 2\u20133 sekund. Syst\u00e9m servisn\u00edch faktor\u016f ANSI se vztahuje na ust\u00e1len\u00e9 a m\u00edrn\u00e9 cyklick\u00e9 zat\u00ed\u017een\u00ed; nezahrnuje setrva\u010dn\u00e9 rozb\u011bhov\u00e9 zat\u00ed\u017een\u00ed. Navr\u017een\u00ed pohonu pro rozb\u011bhov\u00fd moment sp\u00ed\u0161e ne\u017e pro provozn\u00ed moment by vy\u017eadovalo \u0159et\u011bz o dv\u011b velikosti v\u011bt\u0161\u00ed nebo hydraulickou spojku p\u0159ed motorem, aby se omezil rozb\u011bhov\u00fd \u0161pi\u010dkov\u00fd moment. Ani jedna z mo\u017enost\u00ed nebyla zva\u017eov\u00e1na, proto\u017ee rozb\u011bhov\u00e1 podm\u00ednka nebyla zahrnuta do v\u00fdb\u011brov\u00e9ho v\u00fdpo\u010dtu.<\/p>\n

V\u00fdb\u011br spr\u00e1vn\u00e9ho hnac\u00ed \u0159et\u011bz<\/strong> vy\u017eaduje postupn\u00e9 zpracov\u00e1n\u00ed \u010dty\u0159 odli\u0161n\u00fdch technick\u00fdch ot\u00e1zek a vy\u017eaduje, aby na ka\u017edou ot\u00e1zku bylo odpov\u011bzeno pro skute\u010dn\u00fd provozn\u00ed stav \u2013 nikoli pro stav uveden\u00fd na typov\u00e9m \u0161t\u00edtku. Tato p\u0159\u00edru\u010dka poskytuje metodu pro ka\u017ed\u00fd krok.<\/p>\n

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Krok 1 \u2013 Ur\u010den\u00ed korigovan\u00e9ho n\u00e1vrhov\u00e9ho v\u00fdkonu<\/h2>\n

Metoda v\u00fdb\u011bru dle ANSI B29.1 za\u010d\u00edn\u00e1 korigovan\u00fdm n\u00e1vrhov\u00fdm v\u00fdkonem, co\u017e je v\u00fdkon motoru vyn\u00e1soben\u00fd \u0161t\u00edtkov\u00fdm v\u00fdkonem a provozn\u00edm faktorem, kter\u00fd zohled\u0148uje charakter zat\u00ed\u017een\u00ed poh\u00e1n\u011bn\u00e9ho stroje. Publikovan\u00e9 provozn\u00ed faktory ANSI jsou:<\/p>\n

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Typ zat\u00ed\u017een\u00ed<\/th>\nNa\u010d\u00edst znak<\/th>\nFaktor slu\u017eby ANSI<\/th>\nTypick\u00e9 p\u0159\u00edklady za\u0159\u00edzen\u00ed<\/th>\n<\/tr>\n<\/thead>\n
Hladk\u00fd<\/td>\nStabiln\u00ed to\u010div\u00fd moment, \u017e\u00e1dn\u00e9 pulzy<\/td>\n1.0<\/td>\nOdst\u0159ediv\u00e1 \u010derpadla, ventil\u00e1tory, m\u00edchadla kapalin<\/td>\n<\/tr>\n
M\u00edrn\u00fd \u0161ok<\/td>\nCyklick\u00e9 nebo pulzuj\u00edc\u00ed, ob\u010dasn\u00e9 vrcholy<\/td>\n1,3\u20131,5<\/td>\nP\u00e1sov\u00e9 dopravn\u00edky, m\u00edcha\u010dky t\u011bsta, obr\u00e1b\u011bc\u00ed stroje<\/td>\n<\/tr>\n
Siln\u00fd \u0161ok<\/td>\nSiln\u00e9 p\u0159eru\u0161ovan\u00e9 vrcholy, zvraty<\/td>\n1,7\u20132,0<\/td>\nDrti\u010de hornin, lisy, kompresory (p\u00edstov\u00e9)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
Setrva\u010dn\u00e9 rozb\u011bhov\u00e9 zat\u00ed\u017een\u00ed nen\u00ed zahrnuto v syst\u00e9mu provozn\u00edch faktor\u016f ANSI.<\/strong> Provozn\u00ed faktory ANSI jsou kalibrov\u00e1ny pro cyklick\u00e9 provozn\u00ed zat\u00ed\u017een\u00ed a m\u00edrn\u00e9 r\u00e1zy b\u011bhem provozu. Nezahrnuj\u00ed: (1) \u0161pi\u010dky setrva\u010dnosti p\u0159i p\u0159\u00edm\u00e9m rozb\u011bhu motoru, (2) zat\u00ed\u017een\u00ed p\u0159i zad\u0159en\u00ed nebo zablokov\u00e1n\u00ed stroje p\u0159i op\u011btovn\u00e9m rozb\u011bhu, (3) nouzov\u00e9 brzd\u011bn\u00ed s p\u0159ipojen\u00fdm \u0159et\u011bzov\u00fdm pohonem. Pro aplikace, kde rozb\u011bhov\u00fd moment p\u0159esahuje 2\u00d7 provozn\u00ed moment, vypo\u010d\u00edtejte nap\u011bt\u00ed \u0159et\u011bzu p\u0159i rozb\u011bhov\u00e9m momentu nez\u00e1visle a ov\u011b\u0159te ho oproti minim\u00e1ln\u00edmu zat\u00ed\u017een\u00ed \u0159et\u011bzu p\u0159i p\u0159etr\u017een\u00ed s minim\u00e1ln\u00edm bezpe\u010dnostn\u00edm faktorem 8:1 \u2013 nez\u00e1visle na v\u00fdsledku v\u00fdb\u011brov\u00e9 tabulky ANSI.<\/div>\n

Krom\u011b standardn\u00edho servisn\u00edho faktoru se ve specifick\u00fdch p\u0159\u00edpadech uplat\u0148uj\u00ed dva dal\u0161\u00ed multiplik\u00e1tory: a v\u00edcevl\u00e1knov\u00fd faktor<\/strong> (p\u0159i pou\u017eit\u00ed duplexn\u00edho nebo triplexn\u00edho \u0159et\u011bzce se jmenovit\u00fd v\u00fdkon vyn\u00e1sob\u00ed 1,7, respektive 2,5, nikoli jednodu\u0161e zdvojn\u00e1sob\u00ed nebo ztrojn\u00e1sob\u00ed, proto\u017ee prameny nerozd\u011bluj\u00ed z\u00e1t\u011b\u017e dokonale rovnom\u011brn\u011b); a faktor nap\u00ednac\u00edho ozuben\u00e9ho kola<\/strong> (prost\u00e1 nap\u00ednac\u00ed kolo na v\u016fli sni\u017euje jmenovit\u00fd v\u00fdkon p\u0159ibli\u017en\u011b o 10\u2013151 TP3T v d\u016fsledku dodate\u010dn\u00e9ho cyklu \u00fanavy v ohybu).<\/p>\n

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Krok 2 \u2013 Vyberte rozte\u010d \u0159et\u011bzu z tabulky jmenovit\u00fdch v\u00fdkon\u016f<\/h2>\n
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Vztah mezi p\u0159evodov\u00fdm pom\u011brem, ot\u00e1\u010dkami h\u0159\u00eddele a to\u010div\u00fdm momentem \u2013 z\u00e1sadn\u00ed pro spr\u00e1vn\u00fd v\u00fdb\u011br rozte\u010de \u0159et\u011bzu.<\/p>\n<\/div>\n

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Tabulky jmenovit\u00fdch v\u00fdkon\u016f dle normy ANSI B29.1 mapuj\u00ed jakoukoli kombinaci korigovan\u00e9ho konstruk\u010dn\u00edho v\u00fdkonu (kW) a ot\u00e1\u010dek mal\u00e9ho \u0159et\u011bzov\u00e9ho kola (ot.\/min.) na doporu\u010denou rozte\u010d \u0159et\u011bzu. Tabulka je rozd\u011blena do oblast\u00ed \u2013 ka\u017ed\u00e1 oblast je ohrani\u010dena minim\u00e1ln\u00edmi a maxim\u00e1ln\u00edmi ot\u00e1\u010dkami p\u0159i jmenovit\u00e9m v\u00fdkonu \u0159et\u011bzu pro ka\u017edou rozte\u010d. Spr\u00e1vn\u00e1 rozte\u010d je ta, jej\u00ed\u017e oblast obsahuje konstruk\u010dn\u00ed bod (pr\u016fse\u010d\u00edk v\u00fdkonu \u00d7 ot\u00e1\u010dek).<\/p>\n

Dv\u011b pravidla v\u00fdb\u011bru, kter\u00e1 samotn\u00fd graf nesd\u011bluje: zaprv\u00e9, kdy\u017e se konstruk\u010dn\u00ed bod nach\u00e1z\u00ed bl\u00edzko hranice mezi dv\u011bma z\u00f3nami rozte\u010de, v\u017edy zvolte men\u0161\u00ed rozte\u010d a ov\u011b\u0159te, zda je dvoupramenn\u00e9 maz\u00e1n\u00ed v men\u0161\u00ed rozte\u010di vhodn\u011bj\u0161\u00ed ne\u017e jednopramenn\u00e9 maz\u00e1n\u00ed ve v\u011bt\u0161\u00ed. Zadruh\u00e9, p\u0159i n\u00edzk\u00fdch ot\u00e1\u010dk\u00e1ch (pod p\u0159ibli\u017en\u011b 100 ot.\/min. na mal\u00e9m \u0159et\u011bzov\u00e9m kole) se v\u00fdkonov\u00e9 \u00fadaje v grafu st\u00e1vaj\u00ed konzervativn\u00edmi, proto\u017ee tvorba mazac\u00edho filmu se st\u00e1v\u00e1 margin\u00e1ln\u00ed \u2013 p\u0159i velmi n\u00edzk\u00fdch ot\u00e1\u010dk\u00e1ch je spr\u00e1vn\u00fdm p\u0159\u00edstupem bez ohledu na hranici grafu v\u00fdb\u011br dal\u0161\u00ed v\u011bt\u0161\u00ed velikosti z v\u00fdsledku grafu a specifikace nep\u0159etr\u017eit\u00e9ho maz\u00e1n\u00ed.<\/p>\n<\/div>\n<\/div>\n

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Rozte\u010d \u0159et\u011bzu<\/th>\nPraktick\u00fd rozsah ot\u00e1\u010dek (ot.\/min.)<\/th>\nJmenovit\u00fd v\u00fdkon p\u0159i 500 ot.\/min (kW, 17T)<\/th>\nJmenovit\u00fd v\u00fdkon p\u0159i 1450 ot.\/min (kW, 17T)<\/th>\nMaxim\u00e1ln\u00ed doporu\u010den\u00e1 rychlost (ot.\/min., 17T)<\/th>\n<\/tr>\n<\/thead>\n
#35 (9,525 mm)<\/td>\n400\u20133 000+<\/td>\n0.37<\/td>\n0.82<\/td>\n4,800<\/td>\n<\/tr>\n
#40 (12,70 mm)<\/td>\n200\u20132 500<\/td>\n1.20<\/td>\n2.90<\/td>\n3,200<\/td>\n<\/tr>\n
#50 (15,875 mm)<\/td>\n150\u20132 000<\/td>\n2.30<\/td>\n5.20<\/td>\n2,500<\/td>\n<\/tr>\n
#60 (19,05 mm)<\/td>\n100\u20131 800<\/td>\n4.20<\/td>\n9.10<\/td>\n2,000<\/td>\n<\/tr>\n
#80 (25,40 mm)<\/td>\n60\u20131 200<\/td>\n9.50<\/td>\n19.5<\/td>\n1,400<\/td>\n<\/tr>\n
#100 (31,75 mm)<\/td>\n40\u2013900<\/td>\n18.0<\/td>\n35.5<\/td>\n1,100<\/td>\n<\/tr>\n
#120 (38,10 mm)<\/td>\n30\u2013700<\/td>\n30.0<\/td>\n57.0<\/td>\n800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

V\u0161echny jmenovit\u00e9 v\u00fdkony v t\u00e9to tabulce plat\u00ed pro jednopramenn\u00fd \u0159et\u011bz na 17 zubech s kapkov\u00fdm maz\u00e1n\u00edm typu 2. Skute\u010dn\u00fd jmenovit\u00fd v\u00fdkon se zvy\u0161uje s po\u010dtem zub\u016f (17T \u2192 21T p\u0159id\u00e1v\u00e1 p\u0159ibli\u017en\u011b 181 TP3T kapacity) a kles\u00e1 s nedostate\u010dn\u00fdm maz\u00e1n\u00edm (ru\u010dn\u00ed maz\u00e1n\u00ed p\u0159i jmenovit\u00fdch ot\u00e1\u010dk\u00e1ch sni\u017euje efektivn\u00ed kapacitu o 30\u2013401 TP3T oproti hodnot\u011b typu 2). Tabulka je v\u00fdchoz\u00edm bodem pro v\u00fdb\u011br \u0159et\u011bzu, nikoli koncov\u00fdm bodem \u2013 v\u017edy porovnejte s tabulkou v\u00fdb\u011bru zve\u0159ejn\u011bnou v\u00fdrobcem pro konkr\u00e9tn\u00ed t\u0159\u00eddu \u0159et\u011bzu, kter\u00e1 je zva\u017eov\u00e1na.<\/p>\n

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Krok 3 \u2013 Vyberte po\u010det zub\u016f ozuben\u00e9ho kola a potvr\u010fte p\u0159evodov\u00fd pom\u011br<\/h2>\n

Jakmile je potvrzena rozte\u010d \u0159et\u011bzu, zvol\u00ed se po\u010det zub\u016f \u0159et\u011bzov\u00e9ho kola tak, aby se dos\u00e1hlo po\u017eadovan\u00e9ho p\u0159evodov\u00e9ho pom\u011bru. Vzorec pro p\u0159evodov\u00fd pom\u011br je u \u0159et\u011bzov\u00fdch pohon\u016f p\u0159esn\u00fd kv\u016fli pozitivn\u00edmu z\u00e1b\u011bru:<\/p>\n

i = N2 \/ N1 \u2192 n2 = n1 \u00d7 (N1 \/ N2) \u2192 T2 = T1 \u00d7 (N2 \/ N1) \u00d7 \u03b7<\/p>\n
i = p\u0159evodov\u00fd pom\u011br \u00b7 N = po\u010det zub\u016f \u00b7 n = ot\u00e1\u010dky h\u0159\u00eddele (ot.\/min.) \u00b7 T = to\u010div\u00fd moment (Nm) \u00b7 \u03b7 = \u00fa\u010dinnost pohonu (0,97\u20130,985 pro dob\u0159e mazan\u00e9 pohony)<\/div>\n<\/div>\n

T\u0159i pravidla pro po\u010det zub\u016f, kter\u00e1 ovliv\u0148uj\u00ed kvalitu pohonu i mimo p\u0159evodov\u00fd pom\u011br:<\/p>\n

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Minim\u00e1ln\u00ed pravidlo 17 zub\u016f<\/div>\n

Norma ANSI B29.1 specifikuje 17 zub\u016f jako praktick\u00e9 minimum pro plynul\u00fd a tich\u00fd provoz. Pod 17 zuby p\u0159esahuje kol\u00eds\u00e1n\u00ed rychlosti v d\u016fsledku polygonov\u00e9ho efektu \u00b11,71 TP3T, co\u017e vede k sly\u0161iteln\u00e9mu hluku a m\u011b\u0159iteln\u00e9mu zvln\u011bn\u00ed ot\u00e1\u010dek h\u0159\u00eddele. Pod 13 zuby kles\u00e1 \u00fahel op\u00e1s\u00e1n\u00ed mal\u00e9ho ozuben\u00e9ho kola pod 120\u00b0, co\u017e sni\u017euje po\u010det zub\u016f v z\u00e1b\u011bru a vy\u017eaduje sn\u00ed\u017een\u00ed publikovan\u00e9ho v\u00fdkonu. Na una\u0161e\u010di pou\u017eijte minim\u00e1ln\u011b 17T; pro p\u0159esn\u00e9 indexovac\u00ed a servopohony 21T nebo v\u00edce.<\/p>\n<\/div>\n

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Pravidlo pro lich\u00e9 \u010d\u00edslo zubu<\/div>\n

Pou\u017eit\u00ed lich\u00e9ho po\u010dtu zub\u016f na jednom ozuben\u00e9m kole a sud\u00e9ho po\u010dtu na druh\u00e9m zaji\u0161\u0165uje, \u017ee se ka\u017ed\u00e1 kladka dot\u00fdk\u00e1 ka\u017ed\u00e9ho zubu na sv\u00e9m ozuben\u00e9m kole, sp\u00ed\u0161e ne\u017e aby se opakovan\u011b dot\u00fdkala stejn\u00e9ho zubu. T\u00edm se opot\u0159eben\u00ed rozlo\u017e\u00ed po cel\u00e9m obvodu ozuben\u00e9ho kola, sp\u00ed\u0161e ne\u017e aby se koncentrovalo na zlomek zub\u016f, kter\u00e9 by se opakovan\u011b dot\u00fdkaly stejn\u00fdch kladek. Tento efekt je nejv\u00fdrazn\u011bj\u0161\u00ed, kdy\u017e je d\u00e9lka \u0159et\u011bzu cel\u00fd n\u00e1sobek rozte\u010de \u2013 zamezen\u00ed tomuto vztahu \u201elov\u00edc\u00edch zub\u016f\u201c pou\u017eit\u00edm po\u010dtu zub\u016f se spole\u010dn\u00fdm faktorem 1 vede k m\u011b\u0159iteln\u011b rovnom\u011brn\u011bj\u0161\u00edmu rozlo\u017een\u00ed opot\u0159eben\u00ed.<\/p>\n<\/div>\n

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Maxim\u00e1ln\u00ed pom\u011br na stupe\u0148<\/div>\n

Norma ANSI B29.1 doporu\u010duje maxim\u00e1ln\u00ed jednostup\u0148ov\u00fd p\u0159evodov\u00fd pom\u011br 7:1. Nad t\u00edmto pom\u011brem \u00fahel op\u00e1s\u00e1n\u00ed mal\u00e9ho \u0159et\u011bzov\u00e9ho kola kles\u00e1 natolik, \u017ee napnut\u00ed \u0159et\u011bzu nelze spolehliv\u011b udr\u017eovat bez nap\u00edna\u010de. V praxi se pom\u011bry nad 5:1 v jednom stupni obvykle l\u00e9pe \u0159e\u0161\u00ed dvoustup\u0148ov\u00fdm \u0159et\u011bzov\u00fdm pohonem nebo kombinovan\u00fdm uspo\u0159\u00e1d\u00e1n\u00edm \u0159et\u011bzu a p\u0159evodovky \u2013 velk\u00e9 poh\u00e1n\u011bn\u00e9 \u0159et\u011bzov\u00e9 kolo pot\u0159ebn\u00e9 pro pom\u011br 7:1 p\u0159i b\u011b\u017en\u00fdch ot\u00e1\u010dk\u00e1ch h\u0159\u00eddele se st\u00e1v\u00e1 fyzicky nepraktick\u00fdm p\u0159i st\u0159edn\u00edch a velk\u00fdch rozte\u010d\u00edch \u0159et\u011bzu.<\/p>\n<\/div>\n<\/div>\n

Zji\u0161t\u011bn\u00ed protiintuitivn\u00edho polygonov\u00e9ho efektu:<\/strong> Doporu\u010den\u00ed minim\u00e1ln\u011b 17 zub\u016f se net\u00fdk\u00e1 m\u00edry opot\u0159eben\u00ed ani rozlo\u017een\u00ed zat\u00ed\u017een\u00ed \u2013 konkr\u00e9tn\u011b se jedn\u00e1 o zvln\u011bn\u00ed rychlosti. Hnac\u00ed \u0159et\u011bzov\u00e9 kolo s 9 zuby vytv\u00e1\u0159\u00ed kol\u00eds\u00e1n\u00ed rychlosti \u00b16,11 TP3T na hnan\u00e9m h\u0159\u00eddeli, i kdy\u017e jsou ob\u011b \u0159et\u011bzov\u00e1 kola dokonale vyrobena a \u0159et\u011bz je dokonale napnut\u00fd. Toto zvln\u011bn\u00ed rychlosti nelze sn\u00ed\u017eit maz\u00e1n\u00edm, p\u0159edp\u011bt\u00edm ani kvalitou \u0159et\u011bzu \u2013 je to geometrick\u00fd d\u016fsledek z\u00e1b\u011brov\u00e9ho vzoru s diskr\u00e9tn\u00edmi \u010dl\u00e1nky. Jedin\u00fdm \u0159e\u0161en\u00edm je zv\u00fd\u0161en\u00ed po\u010dtu zub\u016f. Konstrukt\u00e9r, kter\u00fd specifikuje 12zub\u00fd una\u0161e\u010d, aby dos\u00e1hl prostorov\u00e9ho obalu, kter\u00fd nepojme 17zub\u00e9 \u0159et\u011bzov\u00e9 kolo, nevy\u0159e\u0161il probl\u00e9m s uspo\u0159\u00e1d\u00e1n\u00edm \u2013 vytvo\u0159il probl\u00e9m s vibracemi a \u00fanavou materi\u00e1lu, kter\u00fd se projev\u00ed v lo\u017eisk\u00e1ch h\u0159\u00eddele a p\u0159ipojen\u00e9m za\u0159\u00edzen\u00ed bez ohledu na to, jak dobr\u00fd je \u0159et\u011bz.<\/div>\n

<\/p>\n

Krok 4 \u2013 Vzd\u00e1lenost mezi st\u0159edy, d\u00e9lka \u0159et\u011bzu a nastaven\u00ed prov\u011b\u0161en\u00ed<\/h2>\n

Doporu\u010den\u00e1 rozte\u010d mezi st\u0159edy pro standardn\u00ed horizont\u00e1ln\u00ed \u0159et\u011bzov\u00e9 pohony je 30\u201350n\u00e1sobek rozte\u010de \u0159et\u011bzu. Pro \u0159et\u011bz ANSI #60 s rozte\u010d\u00ed 19,05 mm to d\u00e1v\u00e1 doporu\u010den\u00fd rozsah 571\u2013952 mm. Rozte\u010d krat\u0161\u00ed ne\u017e 30 z\u00e1vit\u016f sni\u017euje \u00fahel op\u00e1s\u00e1n\u00ed mal\u00e9ho \u0159et\u011bzov\u00e9ho kola; rozte\u010d v\u011bt\u0161\u00ed ne\u017e 50 z\u00e1vit\u016f vytv\u00e1\u0159\u00ed na v\u016fli dlouh\u00fd voln\u00fd rozsah, kter\u00fd v ur\u010dit\u00fdch rozsaz\u00edch ot\u00e1\u010dek vytv\u00e1\u0159\u00ed rezonan\u010dn\u00ed vibrace. Oba extr\u00e9my vy\u017eaduj\u00ed dal\u0161\u00ed opat\u0159en\u00ed \u2013 nap\u00edna\u010d v kr\u00e1tk\u00fdch rozte\u010d\u00edch, vod\u00edtko ve st\u0159edov\u00e9m rozte\u010di nebo tlumi\u010d vibrac\u00ed v dlouh\u00fdch rozte\u010d\u00edch.<\/p>\n

D\u00e9lka \u0159et\u011bzu v rozte\u010d\u00edch (\u010dl\u00e1nkech) se vypo\u010d\u00edt\u00e1 z:<\/p>\n

\n
L = (2C \/ p) + (N1 + N2) \/ 2 + ((N2 \u2212 N1)\u00b2 \u00d7 p) \/ (4\u03c0\u00b2 \u00d7 C)<\/div>\n
L = d\u00e9lka \u0159et\u011bzu v rozte\u010d\u00edch | C = osov\u00e1 vzd\u00e1lenost (mm) | p = rozte\u010d \u0159et\u011bzu (mm) | N1, N2 = po\u010det zub\u016f<\/div>\n<\/div>\n

V\u00fdsledek zaokrouhlete na nejbli\u017e\u0161\u00ed sud\u00e9 \u010d\u00edslo, abyste z\u00edskali standardn\u00ed pln\u00fd spojovac\u00ed \u010dl\u00e1nek (polovi\u010dn\u00ed \u010dl\u00e1nky nebo odsazen\u00e9 \u010dl\u00e1nky jsou slab\u0161\u00ed a je t\u0159eba se jim vyhnout ve v\u0161ech aplikac\u00edch krom\u011b lehk\u00fdch). Osov\u00e1 vzd\u00e1lenost se pot\u00e9 m\u00edrn\u011b uprav\u00ed tak, aby se p\u0159izp\u016fsobila celo\u010dl\u00e1nkov\u00e9mu \u0159et\u011bzu \u2013 p\u0159i zaokrouhlen\u00ed dol\u016f osovou vzd\u00e1lenost zmen\u0161ete, p\u0159i zaokrouhlen\u00ed nahoru ji zv\u011bt\u0161ete.<\/p>\n

Pr\u016fv\u011bs na v\u016fli u horizont\u00e1ln\u00edho pohonu by m\u011bl b\u00fdt nastaven p\u0159ibli\u017en\u011b na 2% osov\u00e9 vzd\u00e1lenosti. Pro pohon s osovou vzd\u00e1lenost\u00ed 600 mm je spr\u00e1vn\u00fd pr\u016fv\u011bs \u2013 m\u011b\u0159en\u00fd ve st\u0159edu spodn\u00ed v\u011btve \u0159et\u011bzu s klidov\u00fdm pohonem \u2013 p\u0159ibli\u017en\u011b 12 mm. P\u0159\u00edli\u0161 napnut\u00fd \u0159et\u011bz zvy\u0161uje zat\u00ed\u017een\u00ed lo\u017eiska a v\u00edce se zah\u0159\u00edv\u00e1; nedostate\u010dn\u00e9 napnut\u00ed umo\u017e\u0148uje t\u0159epot\u00e1n\u00ed voln\u00e9 strany a zvy\u0161uje rychlost n\u00e1razu v\u00e1le\u010dk\u016f na hnac\u00ed \u0159et\u011bzov\u00e9 kolo. U pohon\u016f se svisl\u00fdmi nebo \u0161ikm\u00fdmi v\u011btvemi \u0159et\u011bzu se po\u017eadavek na pr\u016fv\u011bs sni\u017euje na 0\u20131% osov\u00e9 vzd\u00e1lenosti, proto\u017ee gravitace pom\u00e1h\u00e1 nap\u00edn\u00e1n\u00ed \u0159et\u011bzu na spodn\u00ed \u010d\u00e1sti \u0159et\u011bzu.<\/p>\n

<\/p>\n

Krok 5 \u2013 V\u00fdb\u011br mazac\u00edho syst\u00e9mu odpov\u00eddaj\u00edc\u00edho jmenovit\u00e9mu v\u00fdkonu<\/h2>\n

Tabulky jmenovit\u00e9ho v\u00fdkonu ANSI jsou publikov\u00e1ny pro konkr\u00e9tn\u00ed typy maz\u00e1n\u00ed. Pou\u017eit\u00ed metody maz\u00e1n\u00ed ni\u017e\u0161\u00ed kvality, ne\u017e je jmenovit\u00fd typ maz\u00e1n\u00ed, sni\u017euje efektivn\u00ed v\u00fdkonovou kapacitu oproti tabulkov\u00e9 hodnot\u011b. Toto je nej\u010dast\u011bji ignorovan\u00fd aspekt v\u00fdb\u011bru \u0159et\u011bzov\u00e9ho pohonu, proto\u017ee rozhodnut\u00ed o maz\u00e1n\u00ed se \u010dasto prov\u00e1d\u00ed nez\u00e1visle na dimenzov\u00e1n\u00ed \u0159et\u011bzu \u2013 \u00fadr\u017eb\u00e1\u0159sk\u00fdm in\u017een\u00fdrstv\u00edm po dokon\u010den\u00ed mechanick\u00e9ho n\u00e1vrhu.<\/p>\n

\"\"<\/p>\n

Syst\u00e9my hnac\u00edch \u0159et\u011bz\u016f instalovan\u00e9 v kontrolovan\u00e9m pr\u016fmyslov\u00e9m prost\u0159ed\u00ed \u2013 v\u00fdb\u011br mazac\u00edho syst\u00e9mu je stejn\u011b d\u016fle\u017eit\u00fd jako v\u00fdb\u011br velikosti \u0159et\u011bzu.<\/p>\n

\n\n\n\n\n\n\n\n\n
Typ maz\u00e1n\u00ed<\/th>\nMetoda<\/th>\nPou\u017eiteln\u00e9 ot\u00e1\u010dky (ot.\/min, mal\u00e9 ozuben\u00e9 kolo)<\/th>\nV\u00fdkon vs. jmenovit\u00fd v\u00fdkon<\/th>\n<\/tr>\n<\/thead>\n
Typ 1 \u2013 Manu\u00e1ln\u00ed<\/td>\nPravideln\u011b kart\u00e1\u010dujte nebo ma\u010dkejte l\u00e1hev do voln\u00e9 strany<\/td>\nPod 200 ot.\/min.<\/td>\n60\u201370% jmenovit\u00e9ho<\/td>\n<\/tr>\n
Typ 2 \u2013 Kap\u00e1n\u00ed<\/td>\nD\u00e1vkovan\u00fd olej kape z n\u00e1dr\u017eky do \u0159et\u011bzu uvnit\u0159<\/td>\n200\u20131 000 ot.\/min<\/td>\n100% jmenovit\u00e9ho v\u00fdkonu (na z\u00e1klad\u011b grafu)<\/td>\n<\/tr>\n
Typ 3 \u2013 Koupel \/ Slinger<\/td>\n\u0158et\u011bz se proh\u00fdb\u00e1 v olejov\u00e9 van\u011b nebo kotou\u010di, co\u017e vede k usazov\u00e1n\u00ed oleje na \u0159et\u011bz<\/td>\nA\u017e 2 000 ot.\/min<\/td>\n130\u2013150% jmenovit\u00e9ho<\/td>\n<\/tr>\n
Typ 4 \u2013 Nucen\u00fd proud<\/td>\nOlejov\u00e9 \u010derpadlo zaji\u0161\u0165uje nep\u0159etr\u017eit\u00fd proud; filtr + chladi\u010d<\/td>\nV\u0161echny rychlosti v\u010detn\u011b 2 000+ ot.\/min.<\/td>\n150\u2013175% jmenovit\u00e9ho<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

D\u016fsledky t\u00e9to tabulky jsou v\u00fdznamn\u00e9 pro n\u00e1vrh pohonu. \u0158et\u011bz vybran\u00fd na hranici sv\u00e9 jmenovit\u00e9 kapacity s kapkov\u00fdm maz\u00e1n\u00edm typu 2 a pot\u00e9 instalovan\u00fd pouze s ru\u010dn\u00edm maz\u00e1n\u00edm efektivn\u011b b\u011b\u017e\u00ed p\u0159i 140\u20131671 TP3T sv\u00e9 kapacity \u2013 co\u017e je stav, kter\u00fd zp\u016fsob\u00ed \u00fanavov\u00e9 selh\u00e1n\u00ed p\u0159ed uplynut\u00edm konstruk\u010dn\u00ed \u017eivotnosti bez ohledu na kvalitu \u0159et\u011bzu. Naopak, p\u0159echod z kapkov\u00e9ho maz\u00e1n\u00ed na maz\u00e1n\u00ed olejovou l\u00e1zn\u00ed u st\u00e1vaj\u00edc\u00edho pohonu m\u016f\u017ee efektivn\u011b zv\u00fd\u0161it v\u00fdkonovou kapacitu o 30\u2013501 TP3T, co\u017e n\u011bkdy zcela odlo\u017e\u00ed projekt zv\u011bt\u0161en\u00ed \u0159et\u011bzu.<\/p>\n

<\/p>\n

\u0160est chyb p\u0159i v\u00fdb\u011bru hnac\u00edho \u0159et\u011bzu, kter\u00e9 jsou p\u0159\u00ed\u010dinou v\u011bt\u0161iny p\u0159ed\u010dasn\u00fdch poruch<\/h2>\n
\n
\n
1. Pou\u017eit\u00ed servisn\u00edho faktoru na jmenovit\u00fd v\u00fdkon, nikoli na skute\u010dn\u00fd provozn\u00ed v\u00fdkon<\/div>\n

V\u00fdkon motoru uveden\u00fd na \u0161t\u00edtku motoru je maxim\u00e1ln\u00ed trval\u00fd v\u00fdkon, nikoli pr\u016fm\u011brn\u00fd provozn\u00ed v\u00fdkon. Motor o v\u00fdkonu 7,5 kW poh\u00e1n\u011bj\u00edc\u00ed nap\u016fl zat\u00ed\u017een\u00fd dopravn\u00edk s efektivn\u00edm zat\u00ed\u017een\u00edm 3,8 kW by m\u011bl pro v\u00fdb\u011br pou\u017e\u00edt efektivn\u00ed zat\u00ed\u017een\u00ed, nikoli typov\u00fd \u0161t\u00edtek \u2013 tato chyba m\u016f\u017ee nadhodnotit \u0159et\u011bzec o 50\u2013100%, co\u017e sice sice pl\u00fdtv\u00e1 n\u00e1klady, ale je to ne\u0161kodn\u00e9. Nebezpe\u010dn\u00fdm sm\u011brem je pou\u017eit\u00ed servisn\u00edho faktoru na typov\u00fd \u0161t\u00edtek, kdy\u017e pohon b\u011bhem spou\u0161t\u011bn\u00ed nebo p\u0159echodov\u00fdch stav\u016f pravideln\u011b p\u0159ekra\u010duje hodnotu na typov\u00e9m \u0161t\u00edtku.<\/p>\n<\/div>\n

\n
2. Ignorov\u00e1n\u00ed rozb\u011bhov\u00e9ho momentu u p\u0159\u00edmo v\u00e1zan\u00fdch pohon\u016f s p\u0159\u00edm\u00fdm \u0159\u00edzen\u00edm<\/div>\n

P\u0159\u00edm\u00fd start motoru (DOL) vytv\u00e1\u0159\u00ed 5\u20137n\u00e1sobek jmenovit\u00e9ho to\u010div\u00e9ho momentu po dobu 0,5\u20132 sekund. U \u0159et\u011bzov\u00e9ho pohonu p\u0159\u00edmo spojen\u00e9ho s motorem (bez \u0159emenu nebo kapalinov\u00e9 spojky pro absorpci spou\u0161t\u011bc\u00ed \u0161pi\u010dky) se tento \u0161pi\u010dkov\u00fd to\u010div\u00fd moment p\u0159en\u00e1\u0161\u00ed v\u00fdhradn\u011b p\u0159es \u0159et\u011bz. P\u0159i 6n\u00e1sobku jmenovit\u00e9ho to\u010div\u00e9ho momentu se \u0159et\u011bz spr\u00e1vn\u011b dimenzovan\u00fd pro ust\u00e1len\u00fd stav s bezpe\u010dnostn\u00edm faktorem 7:1 nach\u00e1z\u00ed v okam\u017eiku s bezpe\u010dnostn\u00edm faktorem 1,2:1 \u2013 pod prahem jednor\u00e1zov\u00e9ho selh\u00e1n\u00ed pro akumulaci \u00fanavov\u00e9ho po\u0161kozen\u00ed.<\/p>\n<\/div>\n

\n
3. Specifikace \u0159et\u011bzu bez specifikace mazac\u00edho syst\u00e9mu<\/div>\n

V\u00fdb\u011br \u0159et\u011bzu a v\u00fdb\u011br maz\u00e1n\u00ed mus\u00ed b\u00fdt provedeny sou\u010dasn\u011b. \u0158et\u011bz vybran\u00fd na horn\u00ed hranici sv\u00e9ho jmenovit\u00e9ho v\u00fdkonu kapkov\u00e9ho maz\u00e1n\u00ed typu 2 a pot\u00e9 instalovan\u00fd bez kapkov\u00e9ho maz\u00e1n\u00ed \u2013 spol\u00e9haj\u00edc\u00ed se na m\u011bs\u00ed\u010dn\u00ed ru\u010dn\u00ed maz\u00e1n\u00ed \u2013 pracuje s v\u00fdkonem 40\u2013501 TP3T nad svou skute\u010dnou kapacitu za podm\u00ednek instalovan\u00e9ho maz\u00e1n\u00ed.<\/p>\n<\/div>\n

\n
4. Volba m\u00e9n\u011b ne\u017e 17 zub\u016f na mal\u00e9m pastorku z prostorov\u00fdch d\u016fvod\u016f<\/div>\n

Pou\u017eit\u00ed 13 nebo 15 zub\u016f pro \u00fasporu m\u00edsta zav\u00e1d\u00ed v\u00fd\u0161e popsan\u00fd polygonov\u00fd efekt zvln\u011bn\u00ed rychlosti. Jedn\u00e1 se o konstruk\u010dn\u00ed kompromis, nikoli o technickou optimalizaci. Pokud prostor skute\u010dn\u011b nesta\u010d\u00ed k um\u00edst\u011bn\u00ed 17zub\u00e9ho \u0159et\u011bzov\u00e9ho kola v po\u017eadovan\u00e9 osov\u00e9 vzd\u00e1lenosti, spr\u00e1vnou reakc\u00ed je zm\u011bna rozte\u010de \u0159et\u011bzu, nikoli minim\u00e1ln\u00edho po\u010dtu zub\u016f.<\/p>\n<\/div>\n

\n
5. Pou\u017eit\u00ed spojovac\u00edho (polovi\u010dn\u00edho) \u010dl\u00e1nku ve vysoce zat\u00ed\u017een\u00e9m pohonu<\/div>\n

Odsazen\u00fd \u010dl\u00e1nek (polovi\u010dn\u00ed \u010dl\u00e1nek) sni\u017euje lok\u00e1ln\u00ed \u00fanavovou trvanlivost v dan\u00e9m spoji o 20\u2013351 TP3T ve srovn\u00e1n\u00ed s lisovan\u00fdm spojovac\u00edm \u010dl\u00e1nkem. U standardn\u00edch lehk\u00fdch aplikac\u00ed je to p\u0159ijateln\u00e9. U t\u011b\u017ek\u00fdch nebo siln\u011b r\u00e1zov\u011b nam\u00e1han\u00fdch pohon\u016f je spr\u00e1vn\u00fdm p\u0159\u00edstupem upravit osovou vzd\u00e1lenost tak, aby se do n\u00ed ve\u0161el sud\u00fd po\u010det \u010dl\u00e1nk\u016f, a pou\u017e\u00edt lisovan\u00fd spojovac\u00ed \u010dl\u00e1nek n\u00fdtov\u00e9ho typu.<\/p>\n<\/div>\n

\n
6. V\u00fdm\u011bna pouze \u0159et\u011bzu, kdy\u017e jsou ozuben\u00e1 kola opot\u0159ebovan\u00e1<\/div>\n

\u0158et\u011bzov\u00e9 kolo, kter\u00e9 se ot\u00e1\u010delo proti prodlou\u017een\u00e9mu \u0159et\u011bzu, m\u011blo upravenou geometrii zub\u016f tak, aby odpov\u00eddala prodlou\u017een\u00e9 rozte\u010di. Instalace nov\u00e9ho \u0159et\u011bzu na upravenou geometrii zub\u016f vede k urychlen\u00e9mu p\u0159ed\u010dasn\u00e9mu prodlou\u017een\u00ed \u2013 nov\u00fd \u0159et\u011bz dos\u00e1hne prahov\u00e9 hodnoty pro v\u00fdm\u011bnu za zlomek b\u011b\u017en\u00e9 \u017eivotnosti. Vym\u011b\u0148te \u0159et\u011bz i \u0159et\u011bzov\u00e1 kola p\u0159i dosa\u017een\u00ed prahov\u00e9 hodnoty prodlou\u017een\u00ed.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Aplikace, kde m\u00e1 spr\u00e1vn\u00fd v\u00fdb\u011br hnac\u00edho \u0159et\u011bzu nejv\u011bt\u0161\u00ed d\u016fsledek<\/h2>\n

Servopohonem \u0159\u00edzen\u00e9 indexovac\u00ed syst\u00e9my.<\/strong> Servomotory pracuj\u00edc\u00ed v aplikac\u00edch p\u0159esn\u00e9ho polohov\u00e1n\u00ed toleruj\u00ed velmi mal\u00e9 kol\u00eds\u00e1n\u00ed rychlosti v \u0159et\u011bzov\u00e9m pohonu. Polygonov\u00fd efekt z n\u00edzk\u00e9ho po\u010dtu zub\u016f se projevuje jako sinusov\u00e1 chyba polohy na hnan\u00e9 h\u0159\u00eddeli \u2013 17zub\u00fd una\u0161e\u010d vytv\u00e1\u0159\u00ed kol\u00eds\u00e1n\u00ed rychlosti \u00b11,71 TP3T, co\u017e odpov\u00edd\u00e1 chyb\u011b polohy p\u0159ibli\u017en\u011b \u00b10,3 mm p\u0159i polom\u011bru rozte\u010dn\u00e9 kru\u017enice 100 mm. Pro vysoce p\u0159esn\u00e9 indexov\u00e1n\u00ed poskytuje minim\u00e1ln\u011b 21 zub\u016f na una\u0161e\u010di s pevnou osovou vzd\u00e1lenost\u00ed (bez nastaviteln\u00e9 v\u016fle nap\u00edna\u010de) a maz\u00e1n\u00edm v olejov\u00e9 l\u00e1zni nejlep\u0161\u00ed kombinaci p\u0159esnosti polohov\u00e1n\u00ed a \u017eivotnosti. Prohl\u00e9dn\u011bte si na\u0161i nab\u00eddku ozuben\u00e1 kola s hotov\u00fdm otvorem pro p\u0159esn\u00e9 pohony<\/a> pro kompatibiln\u00ed konfigurace.<\/p>\n

Pohony zem\u011bd\u011blsk\u00e9 techniky.<\/strong> Pohony vkl\u00e1dac\u00edho kom\u00edna, ml\u00e1ti\u010dky a dopravn\u00edku skl\u00edzec\u00ed ml\u00e1ti\u010dky pracuj\u00ed s velmi prom\u011bnliv\u00fdm zat\u00ed\u017een\u00edm v abrazivn\u00edm prost\u0159ed\u00ed. Principem v\u00fdb\u011bru je dimenzovat hnac\u00ed \u0159et\u011bz pro nejhor\u0161\u00ed mo\u017en\u00fd sc\u00e9n\u00e1\u0159 zat\u00ed\u017een\u00ed \u2013 nikoli pr\u016fm\u011br \u2013 a specifikovat \u0159et\u011bz s t\u011bsn\u011bn\u00edm O-krou\u017ekem pro kritick\u00e9 pohony, kde je omezen\u00fd p\u0159\u00edstup k mazivu. Ut\u011bsn\u011bn\u00fd \u0159et\u011bz ANSI #80 nebo #100 ve vkl\u00e1dac\u00edm kom\u00edn\u011b skl\u00edzec\u00ed ml\u00e1ti\u010dky vydr\u017e\u00ed v korejsk\u00fdch poln\u00edch podm\u00ednk\u00e1ch 4\u20136kr\u00e1t d\u00e9le ne\u017e otev\u0159en\u00fd \u0159et\u011bz srovnateln\u00e9 jmenovit\u00e9 hodnoty. Ut\u011bsn\u011bn\u00fd varianty v\u00e1le\u010dkov\u00fdch \u0159et\u011bz\u016f pro zem\u011bd\u011blsk\u00e9 aplikace<\/a> jsou skladem v rozte\u010d\u00edch od #60 do #120.<\/p>\n

Nep\u0159etr\u017eit\u00e9 pohony v zpracovatelsk\u00e9m pr\u016fmyslu.<\/strong> Pap\u00edrny, cement\u00e1rny a ocel\u00e1\u0159sk\u00e9 servisn\u00ed st\u0159ediska \u010dasto provozuj\u00ed \u0159et\u011bzov\u00e9 pohony nep\u0159etr\u017eit\u011b po cel\u00e9 t\u00fddny mezi pl\u00e1novan\u00fdmi intervaly \u00fadr\u017eby. Pro tyto aplikace by m\u011bl b\u00fdt v\u00fdb\u011br zalo\u017een na minim\u00e1ln\u00ed \u017eivotnosti 10 000 hodin, co\u017e vy\u017eaduje v\u00fdb\u011br \u0159et\u011bzu s provozn\u00edm zat\u00ed\u017een\u00edm ne v\u011bt\u0161\u00edm ne\u017e 8\u201310% minim\u00e1ln\u00ed nosnosti p\u0159i maz\u00e1n\u00ed s kontinu\u00e1ln\u00edm ob\u011bhem oleje. Toto se jev\u00ed jako velmi konzervativn\u00ed \u2013 a je to z\u00e1m\u011brn\u011b \u2013 proto\u017ee nepl\u00e1novan\u00e9 prostoje v pr\u016fmyslov\u00fdch odv\u011btv\u00edch s kontinu\u00e1ln\u00edm zpracov\u00e1n\u00edm obvykle stoj\u00ed 10\u201330n\u00e1sobek ceny samotn\u00e9ho \u0159et\u011bzu na jeden incident.<\/p>\n

\"V\u00e1le\u010dkov\u00fd<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
\nJak vypo\u010d\u00edt\u00e1m tah \u0159et\u011bzu (nap\u011bt\u00ed na tuh\u00e9 stran\u011b) pro pohon, kter\u00fd pot\u0159ebuji dimenzovat?<\/summary>\n
Tah \u0159et\u011bzu (nap\u011bt\u00ed na t\u011bsn\u00e9 stran\u011b, F1) v hnac\u00edm \u0159et\u011bzu se vypo\u010d\u00edt\u00e1 z p\u0159en\u00e1\u0161en\u00e9ho v\u00fdkonu a rychlosti \u0159et\u011bzu: F1 = P \u00d7 1000 \/ v, kde P je p\u0159en\u00e1\u0161en\u00fd v\u00fdkon v kW a v je rychlost \u0159et\u011bzu v m\/s. Rychlost \u0159et\u011bzu se vypo\u010d\u00edt\u00e1 jako: v = N1 \u00d7 p \u00d7 n1 \/ 60 000, kde N1 je po\u010det zub\u016f una\u0161e\u010de, p je rozte\u010d v mm a n1 jsou ot\u00e1\u010dky una\u0161e\u010de v ot.\/min. Pro pohon o v\u00fdkonu 7,5 kW na 19zub\u00e9m \u0159et\u011bzu #60 p\u0159i 1 450 ot.\/min: v = 19 \u00d7 19,05 \u00d7 1450 \/ 60 000 = 8,74 m\/s. F1 = 7500 \/ 8,74 = 858 N. Toto je nap\u011bt\u00ed na t\u011bsn\u00e9 stran\u011b pouze za ust\u00e1len\u00fdch podm\u00ednek \u2013 pro konstruk\u010dn\u00ed \u00fa\u010dely se vyn\u00e1sob\u00ed provozn\u00edm faktorem. Nap\u011bt\u00ed na v\u016fli (F2) je u dob\u0159e napnut\u00fdch horizont\u00e1ln\u00edch pohon\u016f p\u0159ibli\u017en\u011b F1 \/ 5 a\u017e F1 \/ 10; p\u0159i vysok\u00fdch rychlostech p\u0159id\u00e1v\u00e1 dal\u0161\u00ed slo\u017eku odst\u0159ediv\u00e9 nap\u011bt\u00ed.<\/div>\n<\/details>\n
\nKdy je \u0159et\u011bzov\u00fd pohon \u0161patnou volbou ve srovn\u00e1n\u00ed se synchronn\u00edm \u0159emenov\u00fdm nebo ozuben\u00fdm pohonem?<\/summary>\n
\u0158et\u011bzov\u00e9 pohony jsou \u0161patnou volbou, kdy\u017e: (1) aplikace vy\u017eaduje velmi vysok\u00e9 ot\u00e1\u010dky nad 3 000 ot.\/min. na mal\u00e9m \u0159et\u011bzov\u00e9m kole s rozte\u010d\u00ed v\u011bt\u0161\u00ed ne\u017e #40 \u2013 synchronn\u00ed \u0159emen nebo ozuben\u00e1 kola jsou p\u0159i t\u011bchto ot\u00e1\u010dk\u00e1ch ti\u0161\u0161\u00ed a vy\u017eaduj\u00ed m\u00e9n\u011b \u00fadr\u017eby; (2) prost\u0159ed\u00ed br\u00e1n\u00ed jak\u00e9mukoli maz\u00e1n\u00ed a z\u00e1t\u011b\u017e je pro plastov\u00fd \u0159et\u011bz UHMW p\u0159\u00edli\u0161 vysok\u00e1 \u2013 synchronn\u00ed \u0159emen zcela eliminuje maz\u00e1n\u00ed; (3) instalace nem\u016f\u017ee pojmout ani ut\u011bsn\u011bn\u00fd kryt kolem \u0159et\u011bzu \u2013 v otev\u0159en\u00e9m prost\u0159ed\u00ed s kontaktem s potravinami nad \u0159et\u011bzem synchronn\u00ed \u0159emen bez nutnosti maz\u00e1n\u00ed eliminuje riziko kontaminace; (4) extr\u00e9mn\u011b vysok\u00e1 hustota v\u00fdkonu ve velmi mal\u00e9m objemu \u2013 spir\u00e1lov\u00e1 nebo planetov\u00e1 ozuben\u00e1 kola poskytuj\u00ed vy\u0161\u0161\u00ed pom\u011br v\u00fdkonu k objemu ne\u017e \u0159et\u011bzy. \u0158et\u011bzov\u00e9 pohony z\u016fst\u00e1vaj\u00ed lep\u0161\u00ed pro variabiln\u00ed osov\u00e9 vzd\u00e1lenosti, vysokou toleranci r\u00e1z\u016f, vysok\u00e9 zat\u00ed\u017een\u00ed p\u0159i st\u0159edn\u00ed rychlosti a aplikace vy\u017eaduj\u00edc\u00ed komponenty vym\u011bniteln\u00e9 v ter\u00e9nu bez speci\u00e1ln\u00edho n\u00e1\u0159ad\u00ed.<\/div>\n<\/details>\n
\nM\u011bn\u00ed se \u00fa\u010dinnost \u0159et\u011bzov\u00e9ho pohonu v\u00fdznamn\u011b se zat\u00ed\u017een\u00edm nebo rychlost\u00ed?<\/summary>\n
Ano, v\u00fdrazn\u011b. Dob\u0159e mazan\u00fd v\u00e1le\u010dkov\u00fd \u0159et\u011bz b\u011b\u017e\u00edc\u00ed p\u0159i jmenovit\u00e9m zat\u00ed\u017een\u00ed 30\u2013801 TP3T p\u0159i st\u0159edn\u00ed rychlosti dosahuje mechanick\u00e9 \u00fa\u010dinnosti 97\u201398,51 TP3T. P\u0159i velmi n\u00edzk\u00e9m zat\u00ed\u017een\u00ed (pod 101 TP3T jmenovit\u00e9ho zat\u00ed\u017een\u00ed) se ztr\u00e1ty t\u0159en\u00edm v kloubech \u0159et\u011bzu a z\u00e1b\u011bru \u0159et\u011bzov\u00e9ho kola st\u00e1vaj\u00ed \u00fam\u011brn\u011b velk\u00fdmi v pom\u011bru k p\u0159en\u00e1\u0161en\u00e9mu v\u00fdkonu a \u00fa\u010dinnost m\u016f\u017ee klesnout na 92\u2013941 TP3T. P\u0159i velmi vysok\u00e9m zat\u00ed\u017een\u00ed (nad 801 TP3T jmenovit\u00e9ho zat\u00ed\u017een\u00ed) se tepeln\u00e9 ztr\u00e1ty zvy\u0161uj\u00ed a \u00fa\u010dinnost kles\u00e1 na 94\u2013961 TP3T. P\u0159i vysok\u00fdch rychlostech bl\u00ed\u017e\u00edc\u00edch se limitu ot\u00e1\u010dek \u0159et\u011bzu odst\u0159ediv\u00e9 \u00fa\u010dinky na \u0159et\u011bz sni\u017euj\u00ed efektivn\u00ed nap\u011bt\u00ed na poh\u00e1n\u011bn\u00e9m \u0159et\u011bzov\u00e9m kole, co\u017e d\u00e1le sni\u017euje \u00fa\u010dinnost. \u00dadaje o \u00fa\u010dinnosti publikovan\u00e9 ve v\u011bt\u0161in\u011b katalog\u016f plat\u00ed pro rozsah zat\u00ed\u017een\u00ed 30\u2013701 TP3T \u2013 to je provozn\u00ed z\u00f3na, pro kterou jsou \u0159et\u011bzov\u00e9 pohony navr\u017eeny, a dodr\u017een\u00ed t\u00e9to z\u00f3ny zaji\u0161\u0165uje nejlep\u0161\u00ed \u00fa\u010dinnost i nejdel\u0161\u00ed \u017eivotnost.<\/div>\n<\/details>\n
\nJak\u00fd je spr\u00e1vn\u00fd zp\u016fsob z\u00e1b\u011bhu nov\u00e9ho \u0159et\u011bzu a \u0159et\u011bzov\u00e9ho kola?<\/summary>\n
Nov\u00e9 \u0159et\u011bzy a ozuben\u00e1 kola by m\u011bly b\u00fdt zab\u011bhnuty p\u0159i provozn\u00edm zat\u00ed\u017een\u00ed 50% po dobu prvn\u00edch 2\u20134 hodin provozu. B\u011bhem t\u00e9to doby z\u00e1b\u011bhu se p\u00e1ry \u010dep\u016f a pouzder do sebe dosadnou, k\u0159ivky dosednut\u00ed v\u00e1le\u010dk\u016f se vyle\u0161t\u00ed tak, aby odpov\u00eddaly profilu zubu ozuben\u00e9ho kola, a spojovac\u00ed \u010dl\u00e1nek se zasune do sv\u00e9 polohy v sestav\u011b \u0159et\u011bzu. Po z\u00e1b\u011bhu znovu zkontrolujte a se\u0159i\u010fte napnut\u00ed \u0159et\u011bzu \u2013 nov\u00e9 \u0159et\u011bzy se v prvn\u00edch 10\u201315 hodin\u00e1ch provozu prodlu\u017euj\u00ed rychleji ne\u017e v jak\u00e9mkoli dal\u0161\u00edm bod\u011b provozu, proto\u017ee tolerance lisovan\u00e9ho ulo\u017een\u00ed mezi pouzdry a \u010dl\u00e1nkov\u00fdmi deskami se b\u011bhem t\u00e9to doby konsoliduj\u00ed. Po\u010d\u00e1te\u010dn\u00ed prodlou\u017een\u00ed nesouvis\u00ed s opot\u0159eben\u00edm; jedn\u00e1 se o struktur\u00e1ln\u00ed proces z\u00e1b\u011bhu. Po op\u011btovn\u00e9m napnut\u00ed po z\u00e1b\u011bhu se m\u00edra prodlou\u017een\u00ed obvykle stabilizuje na dlouhodob\u00e9 m\u00ed\u0159e opot\u0159eben\u00ed po zbytek \u017eivotnosti.<\/div>\n<\/details>\n
\nLze \u0159et\u011bzov\u00e9 pohony pou\u017e\u00edt pro vertik\u00e1ln\u00ed p\u0159enos s\u00edly (vertik\u00e1ln\u00ed osy h\u0159\u00eddel\u00ed)?<\/summary>\n
Ano, ale se specifick\u00fdmi \u00fapravami. U vertik\u00e1ln\u00edho pohonu hmotnost \u0159et\u011bzu na voln\u00e9 stran\u011b zvy\u0161uje nap\u011bt\u00ed na voln\u00e9 stran\u011b ve stoupaj\u00edc\u00edm \u0159et\u011bzov\u00e9m \u0159et\u011bzu a sni\u017euje efektivn\u00ed pom\u011br nap\u011bt\u00ed mezi pevnou a volnou stranou \u0159et\u011bzu ve srovn\u00e1n\u00ed s horizont\u00e1ln\u00edm pohonem. To znamen\u00e1, \u017ee se m\u011bn\u00ed doporu\u010den\u00ed minim\u00e1ln\u00edho prov\u011b\u0161en\u00ed \u2013 voln\u00e1 strana pot\u0159ebuje nap\u00edna\u010d nebo vod\u00edtko, aby se zabr\u00e1nilo nadm\u011brn\u00e9mu prov\u011b\u0161en\u00ed horn\u00edho \u0159et\u011bzov\u00e9ho kola vlivem hmotnosti dlouh\u00e9ho vertik\u00e1ln\u00edho rozp\u011bt\u00ed. U vertik\u00e1ln\u00edch pohon\u016f je nav\u00edc nutn\u00e9 upravit zp\u016fsob maz\u00e1n\u00ed \u2013 \u010dasto je praktick\u00e1 jednoduch\u00e1 olejov\u00e1 vana u spodn\u00edho \u0159et\u011bzov\u00e9ho kola, ale je t\u0159eba db\u00e1t na to, aby \u0159et\u011bz nevyst\u0159ikoval mazivo z \u0159et\u011bzu u horn\u00edho \u0159et\u011bzov\u00e9ho kola do oblasti, kde by zp\u016fsobil nebezpe\u010d\u00ed nebo probl\u00e9m s kontaminac\u00ed. Pro vysokorychlostn\u00ed vertik\u00e1ln\u00ed pohony se doporu\u010duje maz\u00e1n\u00ed s nucen\u00fdm ob\u011bhem, kter\u00e9 dod\u00e1v\u00e1 olej do spodn\u00edho \u0159et\u011bzov\u00e9ho kola.<\/div>\n<\/details>\n

<\/p>\n

\n

Nechte si od na\u0161ich technik\u016f ov\u011b\u0159it v\u00e1\u0161 v\u00fdb\u011br hnac\u00edho \u0159et\u011bzu<\/h2>\n

Za\u0161lete n\u00e1m data o va\u0161\u00ed aplikaci \u2013 v\u00fdkon motoru, ot\u00e1\u010dky, typ zat\u00ed\u017een\u00ed, p\u0159\u00edstup k mazivu a prost\u0159ed\u00ed \u2013 a my v\u00e1m p\u0159ed zasl\u00e1n\u00edm jak\u00fdchkoli d\u00edl\u016f potvrd\u00edme rozte\u010d \u0159et\u011bzu, servisn\u00ed faktor, po\u010det zub\u016f \u0159et\u011bzov\u00fdch kol a specifikaci maz\u00e1n\u00ed. Nez\u00e1vazn\u00e9 posouzen\u00ed specifikace do jednoho pracovn\u00edho dne.<\/p>\n

Prohl\u00e9dnout sortiment v\u00e1le\u010dkov\u00fdch \u0159et\u011bz\u016f<\/a>
\nVy\u017e\u00e1dejte si bezplatnou in\u017een\u00fdrskou kontrolu<\/a><\/div>\n<\/div>\n<\/div>\n

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

Engineering Reference \u00b7 Power Transmission Drive Chain Selection: How Engineers Choose the Right Chain for Any Application Most drive chain failures trace back to a selection process that applied the right formula to the wrong variable. This guide covers the complete four-step selection method \u2014 from corrected design power to lubrication type \u2014 and the […]<\/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":[6634],"tags":[72,78,58],"class_list":["post-3349","post","type-post","status-publish","format-standard","hentry","category-chain-sprocket","tag-chain","tag-chain-sprocket","tag-sprocket"],"_links":{"self":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3349","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/comments?post=3349"}],"version-history":[{"count":2,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3349\/revisions"}],"predecessor-version":[{"id":3351,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3349\/revisions\/3351"}],"wp:attachment":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/media?parent=3349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/categories?post=3349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/tags?post=3349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}