{"id":3312,"date":"2026-05-14T03:23:23","date_gmt":"2026-05-14T03:23:23","guid":{"rendered":"https:\/\/sprocket-chain.net\/?p=3312"},"modified":"2026-05-14T03:23:58","modified_gmt":"2026-05-14T03:23:58","slug":"chain-drive-power-rating","status":"publish","type":"post","link":"https:\/\/sprocket-chain.net\/cs\/chain-drive-power-rating\/","title":{"rendered":"Jmenovit\u00fd v\u00fdkon \u0159et\u011bzov\u00e9ho pohonu: Od v\u00fdkonu motoru po spr\u00e1vnou rozte\u010d \u0159et\u011bzu a po\u010det pramen\u016f"},"content":{"rendered":"
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Pdesign<\/sub><\/div>\n
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P_n\u00e1vrh = P_motor \u00d7 K_s \u2192 vyberte rozte\u010d \u0159et\u011bzu \u2192 ov\u011b\u0159te bezpe\u010dnostn\u00ed faktor<\/div>\n

Jmenovit\u00fd v\u00fdkon \u0159et\u011bzov\u00e9ho pohonu: Od v\u00fdkonu motoru po spr\u00e1vnou rozte\u010d \u0159et\u011bzu a po\u010det pramen\u016f<\/h1>\n

Tabulky v\u00fdkonov\u00fdch parametr\u016f dle ANSI B29.1 ud\u00e1vaj\u00ed maxim\u00e1ln\u00ed v\u00fdkon, kter\u00fd m\u016f\u017ee jednovl\u00e1knov\u00fd \u0159et\u011bz p\u0159en\u00e1\u0161et p\u0159i dan\u00e9 rychlosti a stoup\u00e1n\u00ed \u2013 tyto parametry v\u0161ak obsahuj\u00ed p\u0159edpoklady o provozn\u00edch podm\u00ednk\u00e1ch, typu maz\u00e1n\u00ed a mal\u00e9m po\u010dtu zub\u016f \u0159et\u011bzov\u00e9ho kola, kter\u00e9 je nutn\u00e9 p\u0159ed specifikac\u00ed \u0159et\u011bzu ov\u011b\u0159it ve srovn\u00e1n\u00ed se skute\u010dn\u00fdm pou\u017eit\u00edm.<\/p>\n

Nechte si od na\u0161ich technik\u016f ov\u011b\u0159it v\u00e1\u0161 v\u00fdpo\u010det jmenovit\u00e9ho v\u00fdkonu<\/a><\/p>\n<\/div>\n<\/div>\n

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V\u00fdrobce pr\u016fmyslov\u00fdch \u010derpadel v Ulsanu se pot\u00fdkal s p\u0159ed\u010dasn\u00fdm selh\u00e1n\u00edm \u0159et\u011bzu pohonu \u010derpadla chladic\u00ed vody \u2013 duplexn\u00ed \u0159et\u011bz ANSI #80 dos\u00e1hl prodlou\u017een\u00ed 3% za 11 m\u011bs\u00edc\u016f, oproti specifikovan\u00e9 \u017eivotnosti 30+ m\u011bs\u00edc\u016f. Motor m\u011bl v\u00fdkon 18,5 kW p\u0159i 1 450 ot.\/min s redukc\u00ed 3:1. P\u0159i kontrole p\u016fvodn\u00edho v\u00fdb\u011bru \u0159et\u011bzu se uk\u00e1zalo, \u017ee technik vybral \u0159et\u011bz z tabulky ANSI B29.1 p\u0159\u00edmo s pou\u017eit\u00edm jmenovit\u00e9ho v\u00fdkonu motoru. Tabulka ukazovala, \u017ee simplexn\u00ed \u0159et\u011bz #80 p\u0159i 1 450 ot.\/min m\u00e1 jmenovit\u00fd v\u00fdkon 21,4 kW \u2013 co\u017e je dostate\u010dn\u00e9 pro motor o v\u00fdkonu 18,5 kW s rezervou 15%. Co technik nepou\u017eil, byl provozn\u00ed faktor pro typ aplikace (st\u0159edn\u00ed r\u00e1zov\u00fd pohon \u2013 pohon \u010derpadla s p\u0159eru\u0161ovan\u00fdm rozb\u011bhem p\u0159i vysok\u00e9m zat\u00ed\u017een\u00ed: K_s = 1,4), korekce maz\u00e1n\u00ed pro instalovan\u00fd typ s kapac\u00edm maz\u00e1n\u00edm (typ 2 \u2013 faktor 0,9 pro jmenovit\u00fd v\u00fdkon) a korekce mal\u00e9ho \u0159et\u011bzov\u00e9ho kola pro una\u0161e\u010d \u0159et\u011bzov\u00e9ho kola 15T (faktor 0,9 pod referen\u010dn\u00ed hodnotou 17T). Korigovan\u00fd jmenovit\u00fd v\u00fdkon pro tuto konkr\u00e9tn\u00ed instalaci byl 21,4 \u00d7 0,9 \u00d7 0,9 = 17,3 kW \u2013 m\u00e9n\u011b ne\u017e aplikovan\u00e9 zat\u00ed\u017een\u00ed 18,5 kW. \u0158et\u011bz b\u011b\u017eel nep\u0159etr\u017eit\u011b nad sv\u00fdm korigovan\u00fdm jmenovit\u00fdm v\u00fdkonem o 7%, co\u017e je v\u00edce ne\u017e dostate\u010dn\u00e9 k vysv\u011btlen\u00ed zkr\u00e1cen\u00e9 \u017eivotnosti.<\/p>\n

Tabulky jmenovit\u00fdch hodnot \u0159et\u011bzce ANSI nenahrazuj\u00ed kompletn\u00ed v\u00fdpo\u010det jmenovit\u00fdch hodnot m\u011bni\u010de. Jsou to pouze jeden vstup \u2013 maxim\u00e1ln\u00ed jmenovit\u00fd v\u00fdkon za referen\u010dn\u00edch podm\u00ednek. Referen\u010dn\u00ed podm\u00ednky se v re\u00e1ln\u00fdch pr\u016fmyslov\u00fdch aplikac\u00edch opakuj\u00ed jen z\u0159\u00eddka. N\u00ed\u017ee uveden\u00fd v\u00fdpo\u010det poskytuje kompletn\u00ed postup.<\/p>\n

\"vztah<\/p>\n

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Postup \u0161estistup\u0148ov\u00e9ho hodnocen\u00ed v\u00fdkonu \u0159et\u011bzov\u00e9ho pohonu<\/h2>\n
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1<\/div>\n
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Ur\u010dete konstruk\u010dn\u00ed v\u00fdkon<\/div>\n
P_n\u00e1vrh = P_motor \u00d7 K_s<\/div>\n

P_motor je jmenovit\u00fd v\u00fdstupn\u00ed v\u00fdkon motoru v kW. K_s je servisn\u00ed faktor z tabulky v kroku 2. Jedn\u00e1 se o v\u00fdkon, kter\u00fd mus\u00ed b\u00fdt \u0159et\u011bz jmenovit\u011b p\u0159en\u00e1\u0161en \u2013 nikoli v\u00fdkon uveden\u00fd na \u0161t\u00edtku motoru. U pohon\u016f se zna\u010dnou setrva\u010dnost\u00ed (setrva\u010dn\u00edky, velk\u00e9 rotory, rozb\u011bhov\u00e9 zat\u00ed\u017een\u00ed) pou\u017eijte jako z\u00e1klad pro n\u00e1vrh P \u0161pi\u010dkov\u00fd rozb\u011bhov\u00fd moment, nikoli jmenovit\u00fd provozn\u00ed v\u00fdkon.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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2<\/div>\n
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Ur\u010dete servisn\u00ed faktor K_s<\/div>\n
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Typ zat\u00ed\u017een\u00ed<\/th>\n10 h\/den (K_s)<\/th>\n16 h\/den (K_s)<\/th>\n24 hodin denn\u011b (K_s)<\/th>\nP\u0159\u00edklady aplikac\u00ed<\/th>\n<\/tr>\n<\/thead>\n
Hladk\u00fd (bez r\u00e1z\u016f)<\/td>\n1.0<\/td>\n1.1<\/td>\n1.2<\/td>\nOdst\u0159ediv\u00e1 \u010derpadla, ventil\u00e1tory, lehk\u00e9 dopravn\u00edky<\/td>\n<\/tr>\n
M\u00edrn\u00fd \u0161ok<\/td>\n1.3<\/td>\n1.4<\/td>\n1.5<\/td>\nP\u00edstov\u00e1 \u010derpadla, kompresory, obr\u00e1b\u011bc\u00ed stroje<\/td>\n<\/tr>\n
Siln\u00fd \u0161ok<\/td>\n1.5<\/td>\n1.7<\/td>\n1.9<\/td>\nDrti\u010de, lisy, dopravn\u00edky s r\u00e1zov\u00fdm zat\u00ed\u017een\u00edm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Faktor provozn\u00edch hodin zohled\u0148uje akumulaci tepeln\u00e9 \u00fanavy. Pohony pracuj\u00edc\u00ed 24 hodin denn\u011b nikdy nedos\u00e1hnou tepeln\u00e9 rovnov\u00e1hy \u2013 teplota \u0159et\u011bzu z\u016fst\u00e1v\u00e1 po celou dobu zv\u00fd\u0161en\u00e1, co\u017e zvy\u0161uje rychlost prota\u017een\u00ed. Faktor 24 hodin\/den je kv\u016fli tomuto tepeln\u00e9mu efektu vy\u0161\u0161\u00ed ne\u017e \u00fam\u011brn\u00fd po\u010dtu hodin.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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3<\/div>\n
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Vyberte stoup\u00e1n\u00ed z tabulky jmenovit\u00fdch v\u00fdkon\u016f ANSI B29.1 p\u0159i ot\u00e1\u010dk\u00e1ch h\u0159\u00eddele pohonu<\/div>\n

Vyhledejte si tabulku jmenovit\u00e9ho v\u00fdkonu \u0159et\u011bzu ANSI p\u0159i ot\u00e1\u010dk\u00e1ch h\u0159\u00eddele una\u0161e\u010de (n\u2081). Najd\u011bte prvn\u00ed rozte\u010d \u0159et\u011bzu, kde jmenovit\u00fd v\u00fdkon (u una\u0161e\u010de 17T, maz\u00e1n\u00ed olejovou l\u00e1zn\u00ed typu 3 \u2013 referen\u010dn\u00ed podm\u00ednky) p\u0159ekra\u010duje P_design. T\u00edm z\u00edsk\u00e1te prozat\u00edmn\u00ed rozte\u010d. Pokud \u017e\u00e1dn\u00fd jednopramenn\u00fd \u0159et\u011bz nespl\u0148uje P_design, zva\u017ete varianty s duplexn\u00edm nebo t\u0159\u00edpramenn\u00fdm \u0159et\u011bzem (jmenovit\u00fd v\u00fdkon se vyn\u00e1sob\u00ed p\u0159ibli\u017en\u011b 1,7 pro duplexn\u00ed \u0159et\u011bz, 2,5 pro t\u0159\u00edpramenn\u00fd \u0159et\u011bz p\u0159i stejn\u00e9 rozte\u010di).<\/p>\n

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Rozte\u010d \u0159et\u011bzu<\/th>\n400 ot.\/min (kW)<\/th>\n700 ot.\/min (kW)<\/th>\n1 000 ot.\/min (kW)<\/th>\n1 450 ot.\/min (kW)<\/th>\n2 000 ot.\/min (kW)<\/th>\n<\/tr>\n<\/thead>\n
#40 (12,7 mm)<\/td>\n1.4<\/td>\n2.1<\/td>\n2.7<\/td>\n3.3<\/td>\n3.9<\/td>\n<\/tr>\n
#50 (15,9 mm)<\/td>\n2.8<\/td>\n4.4<\/td>\n5.7<\/td>\n7.3<\/td>\n8.5<\/td>\n<\/tr>\n
#60 (19,05 mm)<\/td>\n5.0<\/td>\n7.9<\/td>\n10.4<\/td>\n13.7<\/td>\n16.2<\/td>\n<\/tr>\n
#80 (25,4 mm)<\/td>\n9.4<\/td>\n15.2<\/td>\n20.1<\/td>\n21.4<\/td>\n22.8<\/td>\n<\/tr>\n
#100 (31,75 mm)<\/td>\n15.8<\/td>\n25.6<\/td>\n34.0<\/td>\n36.2<\/td>\n38.4<\/td>\n<\/tr>\n
#120 (38,1 mm)<\/td>\n24.6<\/td>\n39.9<\/td>\n51.5<\/td>\n54.7<\/td>\n56.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Referen\u010dn\u00ed podm\u00ednky: 17T m\u011bni\u010d, maz\u00e1n\u00ed typu 3 (olejov\u00e1 l\u00e1ze\u0148), jednovl\u00e1knov\u00fd. Skute\u010dn\u00fd jmenovit\u00fd v\u00fdkon ve va\u0161\u00ed aplikaci vy\u017eaduje korek\u010dn\u00ed faktory z krok\u016f 4\u20135.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Pou\u017eijte korek\u010dn\u00ed faktor maz\u00e1n\u00ed K_L<\/div>\n

Tabulka ANSI B29.1 p\u0159edpokl\u00e1d\u00e1 maz\u00e1n\u00ed typu 3 (olejov\u00e1 l\u00e1ze\u0148 nebo nucen\u00fd ob\u011bh). Pokud je skute\u010dn\u00e9 maz\u00e1n\u00ed m\u00e9n\u011b \u00fa\u010dinn\u00e9, pou\u017eijte k v\u00fdkonu stolu faktor sn\u00ed\u017een\u00ed v\u00fdkonu:<\/p>\n

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Typ 1 \u2013 Ru\u010dn\u00ed\/kapkov\u00e9 olejov\u00e1n\u00ed<\/div>\n
K_L = 0,7\u20130,8<\/div>\n
Ru\u010dn\u00ed aplikace \u2265 ka\u017ed\u00fdch 8 hodin; kapkov\u00fd olej<\/div>\n<\/div>\n
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Typ 2 \u2013 Kapac\u00ed nebo kotou\u010dov\u00fd olejova\u010d<\/div>\n
K_L = 0,85\u20130,95<\/div>\n
Spr\u00e1vn\u011b nastaven\u00e9 kapkov\u00e9 pod\u00e1v\u00e1n\u00ed; nep\u0159etr\u017eit\u00e9 pod\u00e1v\u00e1n\u00ed<\/div>\n<\/div>\n
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Typ 3 \u2013 Olejov\u00e1 l\u00e1ze\u0148 \/ cirkulace<\/div>\n
K_L = 1,0<\/div>\n
Referen\u010dn\u00ed podm\u00ednka \u2013 plat\u00ed pln\u00e9 hodnocen\u00ed tabulky<\/div>\n<\/div>\n<\/div>\n

Korigovan\u00fd jmenovit\u00fd v\u00fdkon = Tabulkov\u00fd jmenovit\u00fd v\u00fdkon \u00d7 K_L. Pokud tato korigovan\u00e1 hodnota p\u0159ekro\u010d\u00ed P_design, je \u0159et\u011bz pro mazac\u00ed syst\u00e9m vhodn\u00fd. Pokud ne, bu\u010f vylep\u0161ete mazac\u00ed syst\u00e9m, nebo p\u0159ejd\u011bte na nejbli\u017e\u0161\u00ed v\u011bt\u0161\u00ed rozte\u010d.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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5<\/div>\n
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Pou\u017eijte korek\u010dn\u00ed faktor pro mal\u00e9 ozuben\u00e9 kolo K_T<\/div>\n

Referen\u010dn\u00ed podm\u00ednkou tabulky je una\u0161e\u010d 17T. Pokud se po\u010det zub\u016f una\u0161e\u010de li\u0161\u00ed od 17T, pou\u017eijte K_T:<\/p>\n

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Zuby una\u0161e\u010de (N\u2081)<\/th>\n11<\/th>\n12<\/th>\n13<\/th>\n14<\/th>\n15<\/th>\n17<\/th>\n19<\/th>\n21+<\/th>\n<\/tr>\n<\/thead>\n
K_T<\/td>\n0.53<\/td>\n0.62<\/td>\n0.70<\/td>\n0.78<\/td>\n0.85<\/td>\n1.00<\/td>\n1.08<\/td>\n1.15<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Korigovan\u00fd jmenovit\u00fd v\u00fdkon = Tabulkov\u00fd jmenovit\u00fd v\u00fdkon \u00d7 K_L \u00d7 K_T. Jedn\u00e1 se o v\u00fdkon, kter\u00fd m\u016f\u017ee \u0159et\u011bzec p\u0159en\u00e1\u0161et ve skute\u010dn\u00e9 instalaci. Porovnejte s P_design pro ur\u010den\u00ed dostate\u010dnosti.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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6<\/div>\n
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Ov\u011b\u0159te bezpe\u010dnostn\u00ed faktor napnut\u00ed \u0159et\u011bzu<\/div>\n
F_t\u011bsnost = (P_n\u00e1vrh \u00d7 1000) \/ v_\u0159et\u011bz [N]
\nSF = F_break \/ F_tight<\/div>\n

Vypo\u010d\u00edtejte nap\u011bt\u00ed na t\u011bsn\u00e9 stran\u011b z P_design a rychlosti \u0159et\u011bzu v m\/s. Vyd\u011blte minim\u00e1ln\u00ed mezn\u00ed zat\u00ed\u017een\u00ed \u0159et\u011bzu (z tabulky v\u00fdrobce) nap\u011bt\u00edm na t\u011bsn\u00e9 stran\u011b, abyste z\u00edskali bezpe\u010dnostn\u00ed faktor. ANSI B29.1 vy\u017eaduje pro \u0159et\u011bzov\u00e9 pohony za norm\u00e1ln\u00edch podm\u00ednek SF \u2265 5,0. Pokud SF < 5, zvolte bu\u010f dal\u0161\u00ed v\u011bt\u0161\u00ed rozte\u010d, nebo p\u0159idejte druh\u00fd pramen. Rychlost \u0159et\u011bzu: v_chain = (n\u2081 \u00d7 N\u2081 \u00d7 p) \/ 60 000, kde p = rozte\u010d v mm a n\u2081 = ot\u00e1\u010dky \u0159et\u011bzu za minutu.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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P\u0159\u00edklad v\u00fdpo\u010dtu: Kompletn\u00ed v\u00fdpo\u010det jmenovit\u00e9ho v\u00fdkonu pro dopravn\u00edk drti\u010de<\/h2>\n
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Dan\u00e9 podm\u00ednky<\/div>\n
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V\u00fdkon motoru<\/div>\n
22 kW<\/div>\n<\/div>\n
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Ot\u00e1\u010dky h\u0159\u00eddele hnac\u00edho h\u0159\u00eddele<\/div>\n
960 ot.\/min<\/div>\n<\/div>\n
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Aplikace<\/div>\n
Pohon \u0159emenem drti\u010de \u2013 siln\u00fd r\u00e1z<\/div>\n<\/div>\n
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Operace<\/div>\n
16 hodin denn\u011b nep\u0159etr\u017eit\u011b<\/div>\n<\/div>\n
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\u0158et\u011bzov\u00e9 kolo<\/div>\n
15T<\/div>\n<\/div>\n
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Maz\u00e1n\u00ed<\/div>\n
Kapkov\u00fd olejova\u010d (typ 2)<\/div>\n<\/div>\n<\/div>\n
\u0158e\u0161en\u00ed krok za krokem<\/div>\n
    \n
  1. K_s:<\/strong> Siln\u00fd \u0161ok, 16 h\/den \u2192 K_s = 1.7<\/strong><\/li>\n
  2. P_design<\/strong> = 22 \u00d7 1,7 = 37,4 kW<\/strong><\/li>\n
  3. V\u00fdb\u011br v\u00fd\u0161ky t\u00f3nu<\/strong> p\u0159i 960 ot.\/min z tabulky: interpolace mezi hodnotami 700 a 1 000 ot.\/min \u2014 v\u00fdkon #100 \u2248 31,0 kW p\u0159i 960 ot.\/min (p\u0159\u00edli\u0161 n\u00edzk\u00fd). v\u00fdkon #120 \u2248 47,5 kW p\u0159i 960 ot.\/min \u2192 provizorn\u00ed stoup\u00e1n\u00ed = #120<\/strong><\/li>\n
  4. K_L<\/strong> (Kapac\u00ed olejni\u010dka typu 2) = 0.90<\/strong>Korigovan\u00fd v\u00fdkon = 47,5 \u00d7 0,90 = 42,8 kW<\/li>\n
  5. K_T<\/strong> (ovlada\u010d 15T) = 0.85<\/strong>Kone\u010dn\u00e9 korigovan\u00e9 hodnocen\u00ed = 42,8 \u00d7 0,85 = 36,4 kW<\/strong><\/li>\n
  6. Porovnat:<\/strong> 36,4 kW < 37,4 kW (P_design). Rezerva je \u22122,7%. Jednovl\u00e1knov\u00fd vodi\u010d #120 SELH\u00c1 s mal\u00fdm rozd\u00edlem.<\/span><\/li>\n
  7. Mo\u017enosti:<\/strong> (a) P\u0159echod na maz\u00e1n\u00ed v olejov\u00e9 l\u00e1zni (K_L = 1,0) \u2192 42,8 \u00d7 1,0 \u00d7 0,85 = 36,4 st\u00e1le margin\u00e1ln\u00ed. (b) Zv\u00fd\u0161en\u00ed v\u00fdkonu m\u011bni\u010de na 17T \u2192 K_T = 1,0; jmenovit\u00fd v\u00fdkon se zv\u00fd\u0161\u00ed na 47,5 \u00d7 0,90 \u00d7 1,0 = 42,8 kW. PRO\u0160LO s n\u00e1skokem 14%. \u2713<\/span> (c) Pou\u017eijte duplexn\u00ed zdroj #100: 31,0 \u00d7 1,7 \u00d7 0,90 \u00d7 0,85 = 40,3 kW. PRO\u0160LO s n\u00e1skokem 8%. \u2713<\/span><\/li>\n
  8. Kontrola bezpe\u010dnostn\u00edho faktoru (ovlada\u010d 17T, #120, kapkov\u00fd olej):<\/strong> v_\u0159et\u011bz = (960 \u00d7 17 \u00d7 38,1) \/ 60 000 = 10,3 m\/s. F_t\u011bsnost = (37 400 W) \/ 10,3 = 3 631 N. SF = 124 500 \/ 3 631 = 34.3<\/strong>V\u00fdrazn\u011b nad minimem 5,0 \u2013 \u0159et\u011bz je konstruk\u010dn\u011b adekv\u00e1tn\u00ed; ur\u010duj\u00edc\u00edm krit\u00e9riem pro tento v\u00fdb\u011br je kontrola jmenovit\u00e9ho v\u00fdkonu.<\/li>\n<\/ol>\n<\/div>\n
    Protiintuitivn\u00ed: u v\u011bt\u0161iny \u0159et\u011bzov\u00fdch pohon\u016f p\u0159i st\u0159edn\u00edch \u00farovn\u00edch v\u00fdkonu je sou\u010dinitel bezpe\u010dnosti proti statick\u00e9mu zat\u00ed\u017een\u00ed velmi vysok\u00fd (20\u201350\u00d7) a nehraje \u017e\u00e1dnou roli p\u0159i rozhodov\u00e1n\u00ed o v\u00fdb\u011bru \u0159et\u011bzu. Z\u00e1vazn\u00fdm omezen\u00edm je \u00fanavov\u00e1 pevnost \u2013 cyklick\u00e1 \u00fanosnost omezen\u00e1 \u00fanavou \u010dl\u00e1nkov\u00e9 desky a \u010depu, nikoli statickou mez\u00ed kluzu.<\/strong> Tabulky jmenovit\u00e9ho v\u00fdkonu ANSI uv\u00e1d\u011bj\u00ed mez \u00fanavy, nikoli statickou \u00fanosnost. Proto v\u00fdpo\u010det bezpe\u010dnostn\u00edho faktoru (krok 6) z\u0159\u00eddka vybere \u0159et\u011bz v\u011bt\u0161\u00ed ne\u017e kroky jmenovit\u00e9ho v\u00fdkonu \u2013 \u0159et\u011bz, kter\u00fd projde kontrolou jmenovit\u00e9ho v\u00fdkonu, m\u00e1 obvykle bezpe\u010dnostn\u00ed faktor p\u0159i p\u0159etr\u017een\u00ed 20\u201350, co\u017e je v\u00fdrazn\u011b v\u00edce ne\u017e po\u017eadovan\u00fdch 5,0. Naopak aplikace s velmi n\u00edzkou rychlost\u00ed, ale velmi vysok\u00fdm kroutic\u00edm momentem, mohou zp\u016fsobit nap\u011bt\u00ed na t\u011bsn\u00e9 stran\u011b, kter\u00e9 se bl\u00ed\u017e\u00ed minim\u00e1ln\u00edmu p\u0159etr\u017een\u00ed \u0159et\u011bzu \u2013 v tomto p\u0159\u00edpad\u011b se krok 6 st\u00e1v\u00e1 ur\u010duj\u00edc\u00edm omezen\u00edm. V\u017edy zkontrolujte oboj\u00ed.<\/div>\n

    <\/p>\n

    Kdy zvolit v\u00edcevl\u00e1knov\u00fd kabel m\u00edsto v\u011bt\u0161\u00ed rozte\u010de<\/h2>\n

    \"\"<\/p>\n

    Pokud je jmenovit\u00fd v\u00fdkon jednoho \u0159et\u011bzov\u00e9ho kola p\u0159i dan\u00e9 rozte\u010di nedostate\u010dn\u00fd, m\u00e1 konstrukt\u00e9r dv\u011b mo\u017enosti: zv\u011bt\u0161it rozte\u010d nebo zv\u00fd\u0161it po\u010det \u0159et\u011bzov\u00fdch kol. Volba mezi nimi z\u00e1vis\u00ed na omezen\u00edch pr\u016fm\u011bru \u0159et\u011bzov\u00e9ho kola, dostupnosti a cen\u011b.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n
    Rozhodovac\u00ed faktor<\/th>\nZv\u00fd\u0161it v\u00fd\u0161ku t\u00f3nu (nap\u0159. #80 \u2192 #100)<\/th>\nP\u0159idat lanko (nap\u0159. #80 simplex \u2192 duplex)<\/th>\n<\/tr>\n<\/thead>\n
    Vn\u011bj\u0161\u00ed pr\u016fm\u011br ozuben\u00e9ho kola, n\u00e1raz<\/td>\nV\u011bt\u0161\u00ed vn\u011bj\u0161\u00ed pr\u016fm\u011br \u2013 m\u016f\u017ee p\u0159ekro\u010dit ob\u00e1lku<\/td>\nStejn\u00fd vn\u011bj\u0161\u00ed pr\u016fm\u011br \u2013 pouze \u0161ir\u0161\u00ed \u010delo \u0159et\u011bzov\u00e9ho kola<\/td>\n<\/tr>\n
    Zv\u00fd\u0161en\u00ed v\u00fdkonu<\/td>\n#80\u2192#100: +80% kapacita p\u0159i stejn\u00fdch ot\u00e1\u010dk\u00e1ch<\/td>\nJednostrann\u00fd\u2192oboustrann\u00fd tisk: kapacita \u00d71,7<\/td>\n<\/tr>\n
    \u0160\u00ed\u0159ka \u0159et\u011bzu<\/td>\nU\u017e\u0161\u00ed ne\u017e v\u00edcevl\u00e1knov\u00fd<\/td>\n\u0160ir\u0161\u00ed \u2013 ovliv\u0148uje po\u017eadavky na se\u0159\u00edzen\u00ed geometrie h\u0159\u00eddel\u00ed<\/td>\n<\/tr>\n
    Vysokorychlostn\u00ed v\u00fdkon<\/td>\nHor\u0161\u00ed (v\u011bt\u0161\u00ed rozte\u010d = v\u011bt\u0161\u00ed polygonov\u00fd efekt)<\/td>\nStejn\u00e9 jako jednovl\u00e1knov\u00e9 se stejnou rozte\u010d\u00ed<\/td>\n<\/tr>\n
    N\u00e1klady<\/td>\nM\u00edrn\u00fd n\u00e1r\u016fst<\/td>\nProporcion\u00e1ln\u00ed n\u00e1r\u016fst (\u00d71,7 pro duplex)<\/td>\n<\/tr>\n
    Preferov\u00e1no, kdy\u017e:<\/td>\nVn\u011bj\u0161\u00ed pr\u016fm\u011br ozuben\u00e9ho kola nen\u00ed omezen; ni\u017e\u0161\u00ed rychlost<\/td>\nVn\u011bj\u0161\u00ed pr\u016fm\u011br ozuben\u00e9ho kola mus\u00ed z\u016fstat mal\u00fd; vy\u0161\u0161\u00ed rychlost<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    <\/p>\n

    \u010cast\u00e9 chyby ve v\u00fdpo\u010dtech a jak se jim vyhnout<\/h2>\n

    Vyu\u017eit\u00ed v\u00fdkonu motoru bez servisn\u00edho faktoru.<\/strong> Nej\u010dast\u011bj\u0161\u00ed chyba \u2013 v\u00fdb\u011br \u0159et\u011bzu na z\u00e1klad\u011b v\u00fdkonu motoru uveden\u00e9ho na \u0161t\u00edtku bez vyn\u00e1soben\u00ed K_s. Pro motor o v\u00fdkonu 22 kW v aplikaci pro nap\u00e1jen\u00ed drti\u010de (K_s = 1,7) je konstruk\u010dn\u00ed v\u00fdkon 37,4 kW. \u0158et\u011bz s jmenovit\u00fdm v\u00fdkonem 22 kW p\u0159i t\u011bchto ot\u00e1\u010dk\u00e1ch je v\u00fdrazn\u011b poddimenzovan\u00fd. P\u0159ed vyhled\u00e1n\u00edm tabulky v\u00fdkonu pou\u017eijte servisn\u00ed faktor. Technick\u00e9 specifikace \u0159et\u011bz\u016f pro v\u0161echny standardn\u00ed rozte\u010de ANSI<\/a> jsou k dispozici u na\u0161eho produktov\u00e9ho t\u00fdmu.<\/p>\n

    \"ozuben\u00e9<\/p>\n

    Ignorov\u00e1n\u00ed korekce mal\u00e9ho ozuben\u00e9ho kola pod 17T.<\/strong> Pohony s omezen\u00fdm prostorem \u010dasto pou\u017e\u00edvaj\u00ed mal\u00e1 ozuben\u00e1 kola s 12\u201315 zuby. Una\u0161e\u010d 13T p\u0159i 1 000 ot.\/min sni\u017euje efektivn\u00ed jmenovit\u00fd v\u00fdkon \u0159et\u011bzu na 701 TP3T tabulkov\u00e9 hodnoty. Tato korekce je uvedena v norm\u011b ANSI B29.1, ale in\u017een\u00fd\u0159i pou\u017e\u00edvaj\u00edc\u00ed zjednodu\u0161en\u00e9 tabulky ji \u010dasto nepou\u017eij\u00ed. Jedin\u00fdm \u0159e\u0161en\u00edm pro pohon, kter\u00fd je ji\u017e nainstalov\u00e1n s mal\u00fdm una\u0161e\u010dem, je zv\u011bt\u0161en\u00ed po\u010dtu zub\u016f ozuben\u00e9ho kola \u2013 v\u00fdm\u011bna rozte\u010de \u0159et\u011bzu nevy\u0159e\u0161\u00ed nedostatek K_T, pokud po\u010det ozuben\u00fdch kol z\u016fstane pod 17T.<\/p>\n

    Zanedb\u00e1n\u00ed omezen\u00ed rychlosti \u0159et\u011bzu p\u0159i velk\u00e9m stoup\u00e1n\u00ed a vysok\u00fdch ot\u00e1\u010dk\u00e1ch.<\/strong> Tabulka jmenovit\u00fdch v\u00fdkon\u016f ANSI ukazuje \u0161pi\u010dkov\u00fd v\u00fdkon p\u0159i optim\u00e1ln\u00ed rychlosti \u0159et\u011bzu pro ka\u017edou rozte\u010d, pot\u00e9 se nad touto rychlost\u00ed v\u00fdkon sni\u017euje. \u0158et\u011bz #120 p\u0159i 1 450 ot.\/min na una\u0161e\u010di 17T m\u00e1 rychlost \u0159et\u011bzu (1 450 \u00d7 17 \u00d7 38,1) \/ 60 000 = 15,6 m\/s \u2013 nad optim\u00e1ln\u00ed rychlost\u00ed pro tuto rozte\u010d. Jmenovit\u00fd v\u00fdkon v tabulce za t\u011bchto podm\u00ednek odr\u00e1\u017e\u00ed sn\u00ed\u017een\u00fd v\u00fdkon, ale in\u017een\u00fd\u0159i \u010dtouc\u00ed zkr\u00e1cenou tabulku mohou \u0161pi\u010dkov\u00fd v\u00fdkon pou\u017e\u00edt nespr\u00e1vn\u011b. V\u017edy pou\u017e\u00edvejte sloupec specifick\u00fd pro ot\u00e1\u010dky, nikoli maxim\u00e1ln\u00ed hodnotu v \u0159\u00e1dku rozte\u010de.<\/p>\n

    Pro zak\u00e1zkov\u00e9 sady \u0159et\u011bz\u016f a \u0159et\u011bzov\u00fdch kol<\/a> kde v\u00fdpo\u010det vede k neobvykl\u00e9 rozte\u010di \u0159et\u011bzu nebo po\u010dtu zub\u016f<\/strong>, za\u0161lete \u0161est vstupn\u00edch hodnot (v\u00fdkon motoru, ot\u00e1\u010dky, typ slu\u017eby, provozn\u00ed hodiny, typ maz\u00e1n\u00ed, po\u010det zub\u016f una\u0161e\u010de) na\u0161emu technick\u00e9mu t\u00fdmu \u2013 my ov\u011b\u0159\u00edme cel\u00fd \u0161estistup\u0148ov\u00fd v\u00fdpo\u010det a potvrd\u00edme specifikaci p\u0159ed zad\u00e1n\u00edm jak\u00e9koli objedn\u00e1vky.<\/p>\n

    \"ozuben\u00e9<\/p>\n

    \u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
    \nJak ANSI zohled\u0148uje jmenovit\u00fd v\u00fdkon s rozte\u010d\u00ed st\u0159ed\u016f a d\u00e9lkou \u0159et\u011bzu?<\/summary>\n
    Jmenovit\u00e9 v\u00fdkony dle ANSI B29.1 jsou zalo\u017eeny na referen\u010dn\u00ed osov\u00e9 vzd\u00e1lenosti, kter\u00e1 d\u00e1v\u00e1 p\u0159ibli\u017en\u011b 120 \u010dl\u00e1nk\u016f v hnac\u00ed smy\u010dce \u2013 st\u0159edn\u00ed rozsah, kter\u00fd p\u0159edstavuje typick\u00e9 provozn\u00ed podm\u00ednky. Pro velmi kr\u00e1tk\u00e9 osov\u00e9 vzd\u00e1lenosti (pod rozte\u010d\u00ed 20\u00d7) je po\u010det \u010dl\u00e1nk\u016f v kontaktu na hnac\u00edm \u0159et\u011bzov\u00e9m kole ni\u017e\u0161\u00ed ne\u017e v referen\u010dn\u00edm stavu a zat\u00ed\u017een\u00ed na \u010dl\u00e1nek je vy\u0161\u0161\u00ed, co\u017e m\u00edrn\u011b sni\u017euje efektivn\u00ed jmenovit\u00fd v\u00fdkon. Pro velmi dlouh\u00e9 osov\u00e9 vzd\u00e1lenosti (nad rozte\u010d\u00ed 80\u00d7) se v\u00fdznamn\u00fdmi faktory st\u00e1vaj\u00ed prov\u011b\u0161en\u00ed \u0159et\u011bzu a vibrace. Standardn\u00ed korekc\u00ed je udr\u017eovat osov\u00e9 vzd\u00e1lenosti mezi 30 a 50n\u00e1sobkem rozte\u010de \u0159et\u011bzu pro optim\u00e1ln\u00ed v\u00fdkon pohonu. Pohony mimo tento rozsah by m\u011bly pou\u017e\u00edvat korek\u010dn\u00ed tabulky ANSI B29.1 pro vlivy osov\u00e9 vzd\u00e1lenosti nebo by m\u011bly b\u00fdt ov\u011b\u0159eny v\u00fdpo\u010dtem oproti skute\u010dn\u00e9mu napnut\u00ed \u0159et\u011bzu p\u0159i specifick\u00e9 geometrii.<\/div>\n<\/details>\n
    \nLze postup pro stanoven\u00ed v\u00fdkonu pou\u017e\u00edt pro vysokopevnostn\u00ed \u0159et\u011bzy \u0159ady SP?<\/summary>\n
    Ano \u2013 \u0158et\u011bz \u0159ady SP pou\u017e\u00edv\u00e1 stejn\u00fd postup pro stanoven\u00ed v\u00fdkonu s jednou \u00fapravou: jmenovit\u00fd v\u00fdkon z tabulky ANSI B29.1 plat\u00ed pro standardn\u00ed \u0159et\u011bz. U \u0159ady SP je mez \u00fanavy p\u0159ibli\u017en\u011b o 751 TP3T vy\u0161\u0161\u00ed ne\u017e u standardn\u00edho \u0159et\u011bzu p\u0159i stejn\u00e9 rozte\u010di, co\u017e se odr\u00e1\u017e\u00ed v tabulk\u00e1ch jmenovit\u00e9ho v\u00fdkonu \u0159ady SP publikovan\u00fdch v\u00fdrobci \u0159ady SP. V praxi to znamen\u00e1, \u017ee pokud \u0161estikrokov\u00fd postup vede k hrani\u010dn\u00edmu v\u00fdsledku se standardn\u00edm \u0159et\u011bzem (konstruk\u010dn\u00ed v\u00fdkon v rozmez\u00ed 20\u2013301 TP3T korigovan\u00e9ho jmenovit\u00e9ho v\u00fdkonu), m\u016f\u017ee \u0159et\u011bz \u0159ady SP poskytnout dostate\u010dnou rezervu bez zm\u011bny rozte\u010de nebo po\u010dtu pramen\u016f. Pro aplikace, kde standardn\u00ed \u0159et\u011bz spl\u0148uje po\u017eadavky na pohodlnou rezervu (konstruk\u010dn\u00ed v\u00fdkon men\u0161\u00ed ne\u017e 701 TP3T korigovan\u00e9ho jmenovit\u00e9ho v\u00fdkonu), \u0159ada SP neposkytuje \u017e\u00e1dnou dal\u0161\u00ed v\u00fdhodu \u2013 \u0159et\u011bz nen\u00ed provozov\u00e1n na \u00farovni zat\u00ed\u017een\u00ed, kde je vylep\u0161en\u00e1 mez \u00fanavy relevantn\u00ed.<\/div>\n<\/details>\n
    \nJak\u00fd je spr\u00e1vn\u00fd servisn\u00ed faktor pro pohon dopravn\u00edku, kter\u00fd se spou\u0161t\u00ed 4\u20136kr\u00e1t za hodinu s vysok\u00fdm setrva\u010dn\u00fdm zat\u00ed\u017een\u00edm?<\/summary>\n
    \u010cast\u00e9 spou\u0161t\u011bn\u00ed s vysokou setrva\u010dnost\u00ed spad\u00e1 do kategorie \u201et\u011b\u017ek\u00e9 r\u00e1zy\u201c \u2013 K_s = 1,5 (10 h\/den), 1,7 (16 h\/den) nebo 1,9 (24 h\/den). U pohon\u016f dopravn\u00edk\u016f se setrva\u010dnost\u00ed v\u00fdrazn\u011b v\u011bt\u0161\u00ed ne\u017e provozn\u00ed zat\u00ed\u017een\u00ed v\u0161ak m\u016f\u017ee b\u00fdt samotn\u00fd provozn\u00ed faktor ANSI B29.1 nedostate\u010dn\u00fd. V t\u011bchto p\u0159\u00edpadech vypo\u010d\u00edtejte \u0161pi\u010dkov\u00fd rozb\u011bhov\u00fd moment z k\u0159ivky momentu motoru a ot\u00e1\u010dek a p\u0159ipojen\u00e9 setrva\u010dnosti, p\u0159eve\u010fte jej na napnut\u00ed \u0159et\u011bzu pomoc\u00ed polom\u011bru \u0159et\u011bzov\u00e9ho kola a ov\u011b\u0159te bezpe\u010dnostn\u00ed faktor (krok 6) v\u016f\u010di tomuto \u0161pi\u010dkov\u00e9mu nap\u011bt\u00ed, nikoli v\u016f\u010di ust\u00e1len\u00e9mu provozn\u00edmu nap\u011bt\u00ed. Bezpe\u010dnostn\u00ed faktor \u0159et\u011bzu mus\u00ed z\u016fstat nad 5,0 p\u0159i \u0161pi\u010dkov\u00e9m rozb\u011bhov\u00e9m stavu, nejen p\u0159i jmenovit\u00e9m provozn\u00edm stavu. U pohon\u016f s velmi vysokou frekvenc\u00ed rozb\u011bh\u016f nebo velmi velk\u00fdmi pom\u011bry setrva\u010dnosti (rota\u010dn\u00ed setrva\u010dnost v\u011bt\u0161\u00ed ne\u017e 5\u00d7 setrva\u010dnost rotoru motoru) m\u016f\u017ee b\u00fdt nutn\u00e9 \u0159et\u011bz dimenzovat pouze na z\u00e1klad\u011b rozb\u011bhov\u00e9ho momentu, p\u0159i\u010dem\u017e provozn\u00ed zat\u00ed\u017een\u00ed mus\u00ed b\u00fdt v r\u00e1mci nosnosti.<\/div>\n<\/details>\n

    <\/p>\n

    \n
    <\/div>\n
    \n
    P_design \u2192 Hodnocen\u00ed tabulky \u00d7 K_L \u00d7 K_T \u2192 Kontrola SF \u2192 Potvrzen\u00ed \u0159et\u011bzce<\/div>\n

    Pot\u0159ebujete si p\u0159ed objedn\u00e1n\u00edm ov\u011b\u0159it v\u00fdb\u011br \u0159et\u011bzu?<\/h2>\n

    Ode\u0161lete v\u00fdkon motoru (kW), ot\u00e1\u010dky hnac\u00edho h\u0159\u00eddele, ot\u00e1\u010dky hnan\u00e9ho h\u0159\u00eddele, typ aplikace, provozn\u00ed hodiny a typ maz\u00e1n\u00ed. Na\u0161i technici provedou \u0161estistup\u0148ov\u00fd v\u00fdpo\u010det dle normy ANSI B29.1 a p\u0159ed v\u00fdrobou ov\u011b\u0159\u00ed spr\u00e1vnou rozte\u010d, po\u010det pramen\u016f a po\u010det zub\u016f \u0159et\u011bzov\u00e9ho kola.<\/p>\n

    Proch\u00e1zet sortiment \u0159et\u011bz\u016f podle rozte\u010de<\/a>
    \n    Odesl\u00e1n\u00ed parametr\u016f pohonu k v\u00fdpo\u010dtu<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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

    Pdesign P_design = P_motor \u00d7 K_s \u00a0\u2192\u00a0 select chain pitch \u00a0\u2192\u00a0 verify safety factor Chain Drive Power Rating: From Motor Output to Correct Chain Pitch and Strand Count The ANSI B29.1 power rating tables give the maximum power a single-strand chain can transmit at a given speed and pitch \u2014 but these ratings contain assumptions […]<\/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":[78,9,69],"class_list":["post-3312","post","type-post","status-publish","format-standard","hentry","category-chain-sprocket","tag-chain-sprocket","tag-roller-chain","tag-sprocket-china"],"_links":{"self":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3312","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=3312"}],"version-history":[{"count":1,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3312\/revisions"}],"predecessor-version":[{"id":3313,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3312\/revisions\/3313"}],"wp:attachment":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/media?parent=3312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/categories?post=3312"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/tags?post=3312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}