{"id":3335,"date":"2026-05-14T03:55:05","date_gmt":"2026-05-14T03:55:05","guid":{"rendered":"https:\/\/sprocket-chain.net\/?p=3335"},"modified":"2026-05-14T03:55:05","modified_gmt":"2026-05-14T03:55:05","slug":"how-to-calculate-sprocket-tooth-count-for-any-speed-ratio","status":"publish","type":"post","link":"https:\/\/sprocket-chain.net\/cs\/how-to-calculate-sprocket-tooth-count-for-any-speed-ratio\/","title":{"rendered":"Jak vypo\u010d\u00edtat po\u010det zub\u016f \u0159et\u011bzov\u00e9ho kola pro jak\u00fdkoli rychlostn\u00ed pom\u011br"},"content":{"rendered":"
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i = N2 \/ N1 \u2192 n2 = n1 \u00d7 (N1 \/ N2)<\/div>\n

Jak vypo\u010d\u00edtat po\u010det zub\u016f \u0159et\u011bzov\u00e9ho kola pro jak\u00fdkoli rychlostn\u00ed pom\u011br<\/h1>\n

V\u00fdb\u011br po\u010dtu zub\u016f ozuben\u00e9ho kola zp\u011btn\u00fdm postupem od po\u017eadovan\u00e9ho p\u0159evodov\u00e9ho pom\u011bru, ot\u00e1\u010dek h\u0159\u00eddele nebo v\u00fdstupn\u00edho to\u010div\u00e9ho momentu \u2013 a n\u00e1sledn\u00fdm porovn\u00e1n\u00edm t\u011bchto po\u010dt\u016f s technick\u00fdmi omezen\u00edmi, kter\u00e1 ur\u010duj\u00ed, zda bude pohon skute\u010dn\u011b spolehliv\u011b fungovat v provozu.<\/p>\n

Nechte si od na\u0161ich technik\u016f ov\u011b\u0159it v\u00e1\u0161 v\u00fdpo\u010det po\u010dtu zub\u016f<\/a><\/p>\n<\/div>\n<\/div>\n

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Strojn\u00ed in\u017een\u00fdrka, kter\u00e1 v roce 2024 specifikovala nov\u00fd pohon dopravn\u00edku, pot\u0159ebovala sn\u00ed\u017eit ot\u00e1\u010dky h\u0159\u00eddele \u0161nekov\u00e9ho dopravn\u00edku o 185 ot.\/min. \u2013 pom\u011br p\u0159ibli\u017en\u011b 7,8:1. Zvolila \u0159et\u011bz #80 se 17zub\u00fdm una\u0161e\u010dem a 133zub\u00fdm hnac\u00edm kolem, aby dos\u00e1hla p\u0159esn\u011b pom\u011bru 7,82:1. V\u00fdpo\u010det byl spr\u00e1vn\u00fd. Pohon b\u011bhem prvn\u00edho t\u00fddne nedos\u00e1hl po\u017eadovan\u00e9ho v\u00fdkonu p\u0159i konstruk\u010dn\u00ed rychlosti. 133zub\u00e9 hnan\u00e9 ozuben\u00e9 kolo m\u011blo vn\u011bj\u0161\u00ed pr\u016fm\u011br p\u0159ibli\u017en\u011b 1 082 mm \u2013 co\u017e o 220 mm p\u0159ekro\u010dilo dostupnou mont\u00e1\u017en\u00ed v\u016fli. Pom\u011br byl spr\u00e1vn\u00fd. Fyzick\u00e9 rozm\u011bry v\u0161ak nikoli. Pohon musel b\u00fdt p\u0159estav\u011bn na dvoustup\u0148ov\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed s mezih\u0159\u00eddel\u00ed, a to za dvojn\u00e1sobek p\u016fvodn\u00edch v\u00fdrobn\u00edch n\u00e1klad\u016f.<\/p>\n

Spr\u00e1vn\u00fd v\u00fdpo\u010det po\u010dtu zub\u016f ozuben\u00e9ho kola znamen\u00e1 v\u00edce ne\u017e jen \u0159e\u0161en\u00ed pom\u011brov\u00e9 rovnice. Znamen\u00e1 to zpracovat p\u011bt omezen\u00ed, kter\u00e1 ur\u010duj\u00ed, zda je sada po\u010dtu zub\u016f skute\u010dn\u011b pou\u017eiteln\u00e1 \u2013 minim\u00e1ln\u00ed po\u010det hnac\u00edch zub\u016f, maxim\u00e1ln\u00ed pr\u016fm\u011br hnan\u00e9ho ozuben\u00e9ho kola, \u00fahel op\u00e1s\u00e1n\u00ed, osov\u00e1 vzd\u00e1lenost a po\u017eadavek na po\u010det zub\u016f pro rovnom\u011brn\u00e9 rozlo\u017een\u00ed opot\u0159eben\u00ed. Tato p\u0159\u00edru\u010dka pokr\u00fdv\u00e1 v\u0161ech p\u011bt omezen\u00ed a obsahuje p\u0159\u00edklady pro nejb\u011b\u017en\u011bj\u0161\u00ed sc\u00e9n\u00e1\u0159e v\u00fdpo\u010dtu.<\/p>\n

\"vztah<\/p>\n

Vzorec pro fundament\u00e1ln\u00ed pom\u011br a co v\u00e1m d\u00e1v\u00e1<\/h2>\n
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\u010cty\u0159i rovnice \u0159et\u011bzov\u00e9ho pohonu<\/div>\n
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i = N2 \/ N1<\/div>\n
P\u0159evodov\u00fd pom\u011br. N2 = hnan\u00e9 (v\u011bt\u0161\u00ed) ozuben\u00e9 kolo. N1 = hnac\u00ed (men\u0161\u00ed) ozuben\u00e9 kolo.<\/div>\n<\/div>\n
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n2 = n1 \u00d7 (N1\/N2)<\/div>\n
Ot\u00e1\u010dky v\u00fdstupn\u00edho h\u0159\u00eddele v ot.\/min. n1 = ot\u00e1\u010dky hnac\u00edho h\u0159\u00eddele. V\u00fdsledek: v\u00fdstupn\u00ed ot\u00e1\u010dky.<\/div>\n<\/div>\n
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T2 = T1 \u00d7 i \u00d7 \u03b7<\/div>\n
V\u00fdstupn\u00ed to\u010div\u00fd moment. T1 = vstupn\u00ed to\u010div\u00fd moment (Nm). \u03b7 = \u00fa\u010dinnost pohonu (0,97\u20130,985).<\/div>\n<\/div>\n
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PD = p \/ sin(180\u00b0\/N)<\/div>\n
Pr\u016fm\u011br rozte\u010dn\u00e9 kru\u017enice. p = rozte\u010d \u0159et\u011bzu (mm). N = po\u010det zub\u016f. Pou\u017e\u00edv\u00e1 se ke kontrole obvodu \u0159et\u011bzov\u00e9ho kola.<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Rovnice pom\u011bru v\u00e1m \u0159\u00edk\u00e1 vztah mezi po\u010dty zub\u016f \u2013 ne\u0159\u00edk\u00e1 v\u00e1m, kter\u00fd konkr\u00e9tn\u00ed po\u010det zub\u016f pou\u017e\u00edt. Pom\u011bru 4:1 lze dos\u00e1hnout s kombinacemi 17:68, 18:72, 19:76, 21:84 nebo des\u00edtkami dal\u0161\u00edch. Ka\u017ed\u00e1 kombinace vede k m\u00edrn\u011b odli\u0161n\u00e9mu pr\u016fm\u011bru rozte\u010dn\u00e9 kru\u017enice pro hnan\u00e9 ozuben\u00e9 kolo, m\u00edrn\u011b odli\u0161n\u00e9 d\u00e9lce \u0159et\u011bzu a odli\u0161n\u00e9mu po\u010dtu zub\u016f v kontaktu s una\u0161e\u010dem. N\u00e1sleduj\u00edc\u00ed omezen\u00ed ur\u010duj\u00ed, kter\u00e9 kombinace jsou skute\u010dn\u011b pou\u017eiteln\u00e9 pro danou aplikaci.<\/p>\n

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P\u011bt omezen\u00ed, kter\u00e1 ur\u010duj\u00ed platn\u00e9 kombinace po\u010dtu zub\u016f<\/h2>\n

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1<\/div>\n
Minim\u00e1ln\u00ed po\u010det zub\u016f una\u0161e\u010de: 17T (ANSI B29.1)<\/div>\n<\/div>\n
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Norma ANSI B29.1 stanov\u00ed 17 zub\u016f jako praktick\u00e9 minimum pro plynul\u00fd chod \u0159et\u011bzov\u00e9ho pohonu. Pod 17T p\u0159ekra\u010duje kol\u00eds\u00e1n\u00ed rychlosti v d\u016fsledku polygonov\u00e9ho efektu \u00b11,7% \u2013 prahovou hodnotu, nad kterou jsou vibrace v hnan\u00e9m h\u0159\u00eddeli m\u011b\u0159iteln\u00e9. Nejedn\u00e1 se o pevn\u00fd konstruk\u010dn\u00ed limit; \u0159et\u011bz fyzicky pasuje na men\u0161\u00ed po\u010det zub\u016f. Jedn\u00e1 se o limit hladkosti a \u00fanavov\u00e9 \u017eivotnosti. Pro p\u0159esn\u00e9 aplikace (servoindexov\u00e1n\u00ed, m\u011b\u0159ic\u00ed pohony) je praktickou konstruk\u010dn\u00ed hranic\u00ed minimum 21T na pohonu.<\/p>\n

Praktick\u00e9 pravidlo:<\/strong> Ka\u017ed\u00fd v\u00fdpo\u010det po\u010dtu zub\u016f za\u010dn\u011bte s N1 = 17 (nebo 19 nebo 21 pro p\u0159esnost). Nikdy nesni\u017eujte N1 pro dosa\u017een\u00ed pom\u011bru \u2013 rad\u011bji upravte N2.<\/div>\n<\/div>\n<\/div>\n

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2<\/div>\n
Maxim\u00e1ln\u00ed pr\u016fm\u011br hnan\u00e9ho ozuben\u00e9ho kola: instala\u010dn\u00ed rozsah<\/div>\n<\/div>\n
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Pr\u016fm\u011br rozte\u010dn\u00e9 kru\u017enice (PD) hnan\u00e9ho ozuben\u00e9ho kola se vypo\u010d\u00edt\u00e1 jako: PD = p \/ sin(180\u00b0 \/ N2). Vn\u011bj\u0161\u00ed pr\u016fm\u011br (OD) je p\u0159ibli\u017en\u011b: OD \u2248 PD + 0,625p (s pou\u017eit\u00edm standardn\u00ed aproximace v\u00fd\u0161ky zubu). Tento OD se mus\u00ed vej\u00edt do dostupn\u00e9ho z\u00e1stavbov\u00e9ho rozsahu v\u010detn\u011b v\u0161ech v\u016fl\u00ed k sousedn\u00edm sou\u010d\u00e1stem, ochrann\u00fdm kryt\u016fm a pouzdr\u016fm. U vysok\u00fdch p\u0159evodov\u00fdch pom\u011br\u016f je obvykle omezuj\u00edc\u00edm prvkem OD hnan\u00e9ho ozuben\u00e9ho kola \u2013 nikoli samotn\u00fd p\u0159evodov\u00fd pom\u011br.<\/p>\n

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Pom\u011br<\/th>\nN1=17, N2=<\/th>\nPD #60 (mm)<\/th>\nVn\u011bj\u0161\u00ed pr\u016fm\u011br #60 (mm)<\/th>\nPD #40 (mm)<\/th>\nVn\u011bj\u0161\u00ed pr\u016fm\u011br #40 (mm)<\/th>\n<\/tr>\n<\/thead>\n
2:1<\/td>\n34<\/td>\n206.8<\/td>\n218.7<\/td>\n138.0<\/td>\n146.0<\/td>\n<\/tr>\n
3:1<\/td>\n51<\/td>\n309.7<\/td>\n321.6<\/td>\n206.8<\/td>\n214.7<\/td>\n<\/tr>\n
4:1<\/td>\n68<\/td>\n412.9<\/td>\n424.8<\/td>\n275.6<\/td>\n283.5<\/td>\n<\/tr>\n
5:1<\/td>\n85<\/td>\n516.0<\/td>\n527.9<\/td>\n344.4<\/td>\n352.3<\/td>\n<\/tr>\n
6:1<\/td>\n102<\/td>\n619.4<\/td>\n631.3<\/td>\n413.5<\/td>\n421.4<\/td>\n<\/tr>\n
7:1<\/td>\n119<\/td>\n722.8<\/td>\n734.7<\/td>\n482.3<\/td>\n490.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

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3<\/div>\n
Minim\u00e1ln\u00ed \u00fahel op\u00e1s\u00e1n\u00ed na una\u0161e\u010di: 120\u00b0 (6 zub\u016f v kontaktu)<\/div>\n<\/div>\n
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Norma ANSI B29.1 vy\u017eaduje minim\u00e1ln\u00ed \u00fahel op\u00e1s\u00e1n\u00ed 120\u00b0 na mal\u00e9m (hnac\u00edm) ozuben\u00e9m kole, aby platily publikovan\u00e9 jmenovit\u00e9 v\u00fdkony. Pod 120\u00b0 po\u010det zub\u016f sou\u010dasn\u011b v kontaktu se z\u00e1t\u011b\u017e\u00ed klesne pod 3\u20134 a zat\u00ed\u017een\u00ed na zub se zvy\u0161uje natolik, \u017ee je nutn\u00e9 sn\u00ed\u017eit ta\u017enou kapacitu \u0159et\u011bzu. \u00dahel op\u00e1s\u00e1n\u00ed z\u00e1vis\u00ed na p\u0159evodov\u00e9m pom\u011bru a osov\u00e9 vzd\u00e1lenosti: vy\u0161\u0161\u00ed p\u0159evodov\u00e9 pom\u011bry a krat\u0161\u00ed osov\u00e9 vzd\u00e1lenosti \u00fahel op\u00e1s\u00e1n\u00ed sni\u017euj\u00ed. Vzorec je: \u03b8 = 180\u00b0 \u2212 2 \u00d7 arcsin((PD2 \u2212 PD1) \/ (2C)), kde PD2 a PD1 jsou pr\u016fm\u011bry rozte\u010dn\u00e9 kru\u017enice hnac\u00edho a hnac\u00edho kola a C je osov\u00e1 vzd\u00e1lenost. Pro v\u011bt\u0161inu praktick\u00fdch osov\u00fdch vzd\u00e1lenost\u00ed (30\u201350n\u00e1sobek rozte\u010de \u0159et\u011bzu) si p\u0159evody a\u017e do 5:1 udr\u017euj\u00ed minim\u00e1ln\u00ed \u00fahel op\u00e1s\u00e1n\u00ed 120\u00b0 bez korekce.<\/p>\n<\/div>\n<\/div>\n

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Maxim\u00e1ln\u00ed jednostup\u0148ov\u00fd p\u0159evodov\u00fd pom\u011br: 7:1 (doporu\u010den\u00ed ANSI)<\/div>\n<\/div>\n
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Norma ANSI B29.1 doporu\u010duje maxim\u00e1ln\u00ed jednostup\u0148ov\u00fd p\u0159evod 7:1. Nad t\u00edmto pom\u011brem vy\u017eaduje udr\u017een\u00ed \u00fahlu op\u00e1s\u00e1n\u00ed 120\u00b0 bu\u010f neprakticky dlouhou osovou vzd\u00e1lenost, nebo nap\u00edna\u010d \u0159et\u011bzu na voln\u00e9 stran\u011b. V praxi se poh\u00e1n\u011bn\u00e9 ozuben\u00e9 kolo st\u00e1v\u00e1 velmi velk\u00fdm (viz omezen\u00ed 2 v\u00fd\u0161e) a prov\u011b\u0161en\u00ed \u0159et\u011bzu na dlouh\u00e9 voln\u00e9 stran\u011b vy\u017eaduje aktivn\u00ed nap\u00edn\u00e1n\u00ed. Pom\u011br\u016f nad 7:1 by m\u011blo b\u00fdt dosa\u017eeno dvoustup\u0148ov\u00fdm pohonem \u2013 dv\u011bma p\u00e1ry ozuben\u00fdch kol zapojen\u00fdmi v s\u00e9rii na mezilehl\u00e9 h\u0159\u00eddeli. Dvoustup\u0148ov\u00fd pohon dosahuj\u00edc\u00ed pom\u011bru 49:1 (7:1 \u00d7 7:1) je fyzik\u00e1ln\u011b provediteln\u00fd, zat\u00edmco jednostup\u0148ov\u00fd pohon 49:1 je p\u0159i \u017e\u00e1dn\u00e9 u\u017eite\u010dn\u00e9 rozte\u010di \u0159et\u011bzu t\u00e9m\u011b\u0159 nikdy nepraktick\u00fd.<\/p>\n<\/div>\n<\/div>\n

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Princip loveck\u00e9ho zubu: vyhn\u011bte se spole\u010dn\u00fdm \u010dinitel\u016fm mezi N1 a N2<\/div>\n<\/div>\n
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Pokud po\u010dty zub\u016f N1 a N2 sd\u00edlej\u00ed spole\u010dn\u00fd d\u011blitel v\u011bt\u0161\u00ed ne\u017e 1, stejn\u00e1 kladka se p\u0159i ka\u017ed\u00e9 ot\u00e1\u010dce dot\u00fdk\u00e1 stejn\u00e9ho zubu \u0159et\u011bzov\u00e9ho kola \u2013 opot\u0159eben\u00ed se koncentruje na podmno\u017ein\u011b zub\u016f, sp\u00ed\u0161e ne\u017e aby se rovnom\u011brn\u011b rozd\u011blovalo na v\u0161echny. U una\u0161e\u010de 17T a hnan\u00e9ho \u0159et\u011bzov\u00e9ho kola 34T (pom\u011br 2:1) se ka\u017ed\u00e1 kladka dot\u00fdk\u00e1 stejn\u00fdch 17 z 34 hnan\u00fdch zub\u016f \u2013 st\u0159\u00eddaj\u00edc\u00edch se 17 hnan\u00fdch zub\u016f nen\u00ed nikdy zat\u00ed\u017eeno. Pou\u017eit\u00ed una\u0161e\u010de 17T s hnan\u00fdm ozuben\u00fdm kolem 35T (necelo\u010d\u00edseln\u00fd pom\u011br) zaji\u0161\u0165uje, \u017ee ka\u017ed\u00fd hnan\u00fd zub je v pr\u016fb\u011bhu \u010dasu v z\u00e1b\u011bru. Pravidlo: N1 a N2 by m\u011bly m\u00edt nejv\u011bt\u0161\u00edho spole\u010dn\u00e9ho d\u011blitele (NSD) 1, kdekoli je to mo\u017en\u00e9.<\/p>\n<\/div>\n<\/div>\n

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P\u0159\u00edklad 1: Pohon pro sn\u00ed\u017een\u00ed rychlosti balic\u00edho dopravn\u00edku<\/h2>\n

Specifikace:<\/strong> V\u00fdstupn\u00ed h\u0159\u00eddel motoru p\u0159i 1 450 ot\/min. Po\u017eadovan\u00e9 ot\u00e1\u010dky h\u0159\u00eddele dopravn\u00edku: 96 ot\/min. Dostupn\u00fd instala\u010dn\u00ed rozsah pro poh\u00e1n\u011bn\u00e9 ozuben\u00e9 kolo: maxim\u00e1ln\u00ed vn\u011bj\u0161\u00ed pr\u016fm\u011br 280 mm. Rozte\u010d \u0159et\u011bzu: ANSI #50 (15,875 mm). Pou\u017eit\u00ed: d\u011blic\u00ed za\u0159\u00edzen\u00ed balic\u00ed linky \u2013 vy\u017eaduje se plynul\u00fd chod.<\/p>\n

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\u0158e\u0161en\u00ed krok za krokem<\/div>\n
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  1. Po\u017eadovan\u00fd pom\u011br:<\/strong> i = n1 \/ n2 = 1450 \/ 96 = 15.1:1<\/strong>Toto p\u0159ekra\u010duje maxim\u00e1ln\u00ed pom\u011br 7:1 pro jednostup\u0148ov\u00fd pohon \u2192 po\u017eadovan\u00fd dvoustup\u0148ov\u00fd pohon.<\/li>\n
  2. Rozd\u011blte pom\u011br do dvou f\u00e1z\u00ed:<\/strong> \u221a15,1 \u2248 3,89. Sna\u017ete se o dva podobn\u00e9 stupn\u011b. Pom\u011br stupn\u011b 1 \u2248 3,9:1. Pom\u011br stupn\u011b 2 \u2248 3,87:1 (3,9 \u00d7 3,87 = 15,09 \u2013 dostate\u010dn\u011b bl\u00edzko). Zaokrouhlete na dosa\u017eiteln\u00fd po\u010det zub\u016f.<\/li>\n
  3. Po\u010det zub\u016f v 1. f\u00e1zi:<\/strong> Za\u010dn\u011bte s N1 = 19T (p\u0159esn\u00e1 aplikace). N2 = 19 \u00d7 3,9 = 74,1 \u2192 zaokrouhlete na 73T (lich\u00e9 \u2014 spl\u0148uje pravidlo Huntingova zubu, GCD(19,73) = 1). Skute\u010dn\u00fd pom\u011br, stupe\u0148 1: 73\/19 = 3,842.<\/li>\n
  4. Po\u010det zub\u016f ve 2. f\u00e1zi:<\/strong> Mezilehl\u00e9 ot\u00e1\u010dky h\u0159\u00eddele = 1450 \/ 3,842 = 377 ot.\/min. Po\u017eadovan\u00fd p\u0159evodov\u00fd pom\u011br 2. stupn\u011b pro dosa\u017een\u00ed 96 ot.\/min: 377 \/ 96 = 3,927. Za\u010dn\u011bte s N3 = 19T. N4 = 19 \u00d7 3,927 = 74,6 \u2192 75T (GCD(19,75) = 1). Skute\u010dn\u00fd p\u0159evodov\u00fd pom\u011br 2. stupn\u011b: 75\/19 = 3,947. Kone\u010dn\u00fd v\u00fdkon: 1450 \/ (3,842 \u00d7 3,947) = 95,6 ot.\/min \u2248 96 ot.\/min \u2713<\/strong><\/li>\n
  5. Zkontrolujte vn\u011bj\u0161\u00ed pr\u016fm\u011br hnan\u00e9ho ozuben\u00e9ho kola oproti ob\u00e1lce:<\/strong> Nejv\u011bt\u0161\u00ed pastorek m\u00e1 rozte\u010d 75T p\u0159i stoup\u00e1n\u00ed #50. PD = 15,875 \/ sin(180\u00b0\/75) = 15,875 \/ sin(2,4\u00b0) = 15,875 \/ 0,04188 = 379,1 mm. OD \u2248 379,1 + (0,625 \u00d7 15,875) = 379,1 + 9,9 = 389 mm<\/strong>Toto p\u0159ekra\u010duje ob\u00e1lku 280 mm \u2013 je nutn\u00e9 sn\u00ed\u017eit v\u00fd\u0161ku t\u00f3nu nebo zv\u00fd\u0161it po\u010det p\u00f3di\u00ed.<\/li>\n
  6. Rezoluce:<\/strong> Zredukovat na \u0159et\u011bz #40 (rozte\u010d 12,70 mm). 75T p\u0159i rozte\u010di #40: PD = 12,70 \/ sin(2,4\u00b0) = 303,3 mm. OD \u2248 303,3 + 7,9 = 311 mm<\/strong>St\u00e1le o 31 mm v\u00edce. Sn\u00ed\u017een\u00ed na 70T: PD = 12,70 \/ sin(2,57\u00b0) = 283,2 mm. OD \u2248 283,2 + 7,9 = 291 mm<\/strong>V r\u00e1mci ob\u00e1lky s maximem 280 mm. Nov\u00fd p\u0159evodov\u00fd pom\u011br 2. stupn\u011b: 70\/19 = 3,684. Kone\u010dn\u00e1 rychlost: 1450 \/ (3,842 \u00d7 3,684) = 102,4 ot.\/min<\/strong>P\u0159ijateln\u00e9 pro tuto aplikaci (tolerance specifikace \u00b110%). \u2713<\/li>\n<\/ol>\n<\/div>\n
    Protiintuitivn\u00ed: sn\u00ed\u017een\u00ed rozte\u010de \u0159et\u011bzu umo\u017e\u0148uje vy\u0161\u0161\u00ed po\u010det zub\u016f p\u0159i stejn\u00e9m vn\u011bj\u0161\u00edm pr\u016fm\u011bru \u0159et\u011bzov\u00e9ho kola \u2013 co\u017e zlep\u0161uje plynulost chodu a z\u00e1rove\u0148 umo\u017e\u0148uje p\u0159izp\u016fsoben\u00ed z\u00e1stavbov\u00fdm rozm\u011br\u016fm.<\/strong> P\u0159echod z rozte\u010de \u0159et\u011bzov\u00e9ho kola #50 na #40 sn\u00ed\u017eil vn\u011bj\u0161\u00ed pr\u016fm\u011br ozuben\u00e9ho kola z 389 mm na 311 mm p\u0159i stejn\u00e9m po\u010dtu zub\u016f. Tato men\u0161\u00ed rozte\u010d tak\u00e9 zvy\u0161uje relativn\u00ed v\u00fdhodu po\u010dtu zub\u016f una\u0161e\u010de \u2013 p\u0159i 19 zubech m\u00e1 \u0159et\u011bz #40 men\u0161\u00ed kol\u00eds\u00e1n\u00ed rychlosti v d\u016fsledku polygon\u00e1ln\u00edho efektu ne\u017e \u0159et\u011bz #50, proto\u017ee fyzick\u00e1 d\u00e9lka t\u011btivy (a tedy i \u00fahlov\u00e1 variace na \u010dl\u00e1nek) je men\u0161\u00ed. \u0158e\u0161en\u00ed s men\u0161\u00ed rozte\u010d\u00ed a vy\u0161\u0161\u00edm po\u010dtem zub\u016f v omezen\u00e9m rozsahu je \u010dasto plynulej\u0161\u00ed a men\u0161\u00ed ne\u017e zjevn\u00e9 \u0159e\u0161en\u00ed s v\u011bt\u0161\u00ed rozte\u010d\u00ed.<\/div>\n

    <\/p>\n

    \u0158e\u0161en\u00fd p\u0159\u00edklad 2: Pohon pro zv\u00fd\u0161en\u00ed ot\u00e1\u010dek (p\u0159et\u00ed\u017een\u00ed) gener\u00e1toru<\/h2>\n

    Specifikace:<\/strong> V\u00fdvodov\u00fd h\u0159\u00eddel vzn\u011btov\u00e9ho motoru p\u0159i 1 000 ot.\/min. Gener\u00e1tor vy\u017eaduje vstupn\u00ed ot\u00e1\u010dky 1 800 ot.\/min. Rozte\u010d \u0159et\u011bzu: ANSI #80 (25,4 mm) \u2013 ji\u017e specifikov\u00e1no v\u00fdrobcem gener\u00e1toru. Najd\u011bte spr\u00e1vn\u00fd po\u010det zub\u016f \u0159et\u011bzov\u00e9ho kola.<\/p>\n

    \n
    \n
    \n
    i = n_engine \/ n_gen = 1000\/1800 = 0,556
    \nN2\/N1 = 0,556 \u2192 N1 > N2 (zv\u00fd\u0161en\u00ed rychlosti)
    \nN2 = poh\u00e1n\u011bn\u00e9 (gener\u00e1tor) = men\u0161\u00ed ozuben\u00e9 kolo
    \nN1 = hnac\u00ed kolo (motor) = v\u011bt\u0161\u00ed pastorek<\/div>\n<\/div>\n

    V konfiguraci s overdrive je hnac\u00ed hnac\u00edm kolem v\u011bt\u0161\u00ed ozuben\u00e9 kolo. Za\u010dn\u011bte s minimem 17T na hnan\u00e9m ozuben\u00e9m kole (men\u0161\u00edm): N2 = 17T. N1 = N2 \/ i = 17 \/ 0,556 = 30,6 \u2192 zaokrouhlete na 31T. Skute\u010dn\u00fd p\u0159evod: 17\/31 = 0,548. Skute\u010dn\u00e9 ot\u00e1\u010dky gener\u00e1toru: 1000 \/ 0,548 = 1 825 ot.\/min<\/strong> \u2014 do 1,4% od c\u00edle. GCD(31, 17) = 1 \u2713 (spln\u011bn loveck\u00fd zub).<\/p>\n

    Kontrola ob\u00e1lky:<\/strong> Hnan\u00e9 ozuben\u00e9 kolo (17T) p\u0159i stoup\u00e1n\u00ed #80: PD = 25,4 \/ sin(10,59\u00b0) = 138,1 mm. OD \u2248 138,1 + 15,9 = 154 mm. Hnan\u00e9 ozuben\u00e9 kolo (31T): PD = 25,4 \/ sin(5,81\u00b0) = 250,7 mm. OD \u2248 250,7 + 15,9 = 267 mm. Ob\u011b hodnoty se nach\u00e1zej\u00ed v typick\u00fdch instala\u010dn\u00edch rozmez\u00edch pro spojku motor-gener\u00e1tor.<\/p>\n<\/div>\n

    \"\"<\/p>\n

    Syst\u00e9m pohonu \u0159et\u011bzem a ozuben\u00fdm kolem \u2013 v\u00fdpo\u010det spr\u00e1vn\u00e9ho po\u010dtu zub\u016f zaji\u0161\u0165uje po\u017eadovan\u00fd p\u0159evodov\u00fd pom\u011br p\u0159i zachov\u00e1n\u00ed geometrick\u00fdch omezen\u00ed \u0159et\u011bzov\u00e9ho pohonu.<\/p>\n<\/div>\n<\/div>\n

    <\/p>\n

    Rychl\u00fd p\u0159ehled kombinac\u00ed po\u010dtu zub\u016f pro b\u011b\u017en\u00e9 pom\u011bry<\/h2>\n

    Pro nej\u010dast\u011bji specifikovan\u00e9 pom\u011bry uv\u00e1d\u00ed n\u00ed\u017ee uveden\u00e1 tabulka p\u0159edem vypo\u010d\u00edtan\u00e9 dvojice po\u010dtu zub\u016f, kter\u00e9 spl\u0148uj\u00ed v\u0161ech p\u011bt omezen\u00ed \u2013 minim\u00e1ln\u00ed una\u0161e\u010d 17T, GCD = 1, jednostup\u0148ov\u00fd pom\u011br \u2264 7:1 a \u017e\u00e1dn\u00fd p\u0159esn\u00fd celo\u010d\u00edseln\u00fd pom\u011br (kter\u00fd by zabr\u00e1nil optim\u00e1ln\u00edmu rozlo\u017een\u00ed zub\u016f).<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n
    Po\u017eadovan\u00fd pom\u011br<\/th>\nN1 (\u0159idi\u010d)<\/th>\nN2 (poh\u00e1n\u011bn\u00e9)<\/th>\nSkute\u010dn\u00fd pom\u011br<\/th>\nChyba pom\u011bru<\/th>\nNSD<\/th>\nPD (N2) p\u0159i #60 (mm)<\/th>\nPozn\u00e1mky<\/th>\n<\/tr>\n<\/thead>\n
    1.5:1<\/td>\n19<\/td>\n29<\/td>\n1.526<\/td>\n+1.7%<\/td>\n1 \u2713<\/td>\n174.3<\/td>\nKompaktn\u00ed; dobr\u00e1 hladkost<\/td>\n<\/tr>\n
    2:1<\/td>\n19<\/td>\n37<\/td>\n1.947<\/td>\n\u22122,6%<\/td>\n1 \u2713<\/td>\n224.5<\/td>\n19:38 je p\u0159esn\u00e9, ale GCD=19 \u2013 vyhn\u011bte se<\/td>\n<\/tr>\n
    2.5:1<\/td>\n17<\/td>\n43<\/td>\n2.529<\/td>\n+1.2%<\/td>\n1 \u2713<\/td>\n261.2<\/td>\n<\/td>\n<\/tr>\n
    3:1<\/td>\n19<\/td>\n57<\/td>\n3.000<\/td>\n0%<\/td>\n19 \u2717<\/td>\n346.2<\/td>\nPou\u017eijte 19:58 (NSV=1) nebo 17:51 (NSV=17!) \u2192 pou\u017eijte m\u00edsto toho 17:53<\/td>\n<\/tr>\n
    3:1 (opraveno)<\/td>\n17<\/td>\n53<\/td>\n3.118<\/td>\n+3.9%<\/td>\n1 \u2713<\/td>\n321.8<\/td>\nP\u0159ijateln\u00e9, pokud je tolerance rychlosti \u00b15%<\/td>\n<\/tr>\n
    4:1<\/td>\n19<\/td>\n75<\/td>\n3.947<\/td>\n\u22121,3%<\/td>\n1 \u2713<\/td>\n455.5<\/td>\n19:76 p\u0159esn\u00e9, ale GCD=19 \u2014 vyhnout se<\/td>\n<\/tr>\n
    5:1<\/td>\n19<\/td>\n97<\/td>\n5.105<\/td>\n+2.1%<\/td>\n1 \u2713<\/td>\n589.2<\/td>\nVelk\u00e9 hnac\u00ed ozuben\u00e9 kolo \u2013 zkontrolujte vn\u011bj\u0161\u00ed pr\u016fm\u011br<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    <\/p>\n

    N\u00e1vrh dvoustup\u0148ov\u00fdch \u0159et\u011bzov\u00fdch pohon\u016f: Mezilehl\u00fd h\u0159\u00eddel a rozd\u011blen\u00ed p\u0159evodov\u00e9ho pom\u011bru stup\u0148\u016f<\/h2>\n

    Pokud po\u017eadovan\u00fd p\u0159evodov\u00fd pom\u011br p\u0159es\u00e1hne 7:1 nebo pokud by vn\u011bj\u0161\u00ed pr\u016fm\u011br hnan\u00e9ho ozuben\u00e9ho kola p\u0159ekro\u010dil instala\u010dn\u00ed limit v jednom stupni, je standardn\u00edm \u0159e\u0161en\u00edm dvoustup\u0148ov\u00fd pohon s mezilehlou h\u0159\u00eddel\u00ed. Mezilehl\u00e1 h\u0159\u00eddel nese jak hnan\u00e9 ozuben\u00e9 kolo (p\u0159ij\u00edmaj\u00edc\u00ed v\u00fdkon ze stupn\u011b 1), tak i hnac\u00ed ozuben\u00e9 kolo (p\u0159en\u00e1\u0161ej\u00edc\u00ed v\u00fdkon do stupn\u011b 2). Vyn\u00e1soben\u00edm p\u0159evodov\u00fdch pom\u011br\u016f obou stup\u0148\u016f z\u00edsk\u00e1me celkov\u00fd p\u0159evodov\u00fd pom\u011br: i_celkem = i_stupe\u01481 \u00d7 i_stupe\u01482.<\/p>\n

    Pro dosa\u017een\u00ed nejlep\u0161\u00edho celkov\u00e9ho v\u00fdkonu pohonu ve dvoustup\u0148ov\u00e9m uspo\u0159\u00e1d\u00e1n\u00ed by m\u011bly b\u00fdt p\u0159evodov\u00e9 pom\u011bry stup\u0148\u016f p\u0159ibli\u017en\u011b stejn\u00e9 \u2013 t\u00edm se minimalizuje velikost nejv\u011bt\u0161\u00edho ozuben\u00e9ho kola v syst\u00e9mu. Nerovnom\u011brn\u00e9 rozd\u011blen\u00ed stup\u0148\u016f (nap\u0159. 3:1 a 5:1 pro celkov\u00fd pom\u011br 15:1) vede k v\u011bt\u0161\u00edmu maxim\u00e1ln\u00edmu ozuben\u00e9mu kolu ne\u017e stejn\u00e9 rozd\u011blen\u00ed (nap\u0159. 3,87:1 a 3,87:1 pro stejn\u00fd pom\u011br 15:1). Stejn\u00e9 p\u0159evodov\u00e9 pom\u011bry stup\u0148\u016f tak\u00e9 vedou k stejn\u00e9mu nap\u011bt\u00ed \u0159et\u011bzu v obou stupn\u00edch, pokud je p\u0159en\u00e1\u0161en\u00fd v\u00fdkon stejn\u00fd, co\u017e zjednodu\u0161uje dimenzov\u00e1n\u00ed \u0159et\u011bzu.<\/p>\n

    Lo\u017eiska mezilehl\u00e9ho h\u0159\u00eddele mus\u00ed b\u00fdt dimenzov\u00e1na pro kombinovan\u00e1 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed z obou \u0159et\u011bzov\u00fdch pohon\u016f p\u016fsob\u00edc\u00edch na h\u0159\u00eddel. U dvoustup\u0148ov\u00e9ho pohonu p\u016fsob\u00ed nap\u011bt\u00ed na t\u011bsn\u00fdch stran\u00e1ch ze stupn\u011b 1 a stupn\u011b 2 ve sm\u011brech ur\u010den\u00fdch geometri\u00ed \u0159et\u011bzov\u00e9ho b\u011bhu \u2013 pokud ob\u011b t\u011bsn\u00e9 strany t\u00e1hnou mezilehl\u00fd h\u0159\u00eddel v opa\u010dn\u00fdch sm\u011brech, zat\u00ed\u017een\u00ed lo\u017eiska se \u010d\u00e1ste\u010dn\u011b vyru\u0161\u00ed. Pokud ob\u011b strany t\u00e1hnou ve stejn\u00e9m sm\u011bru, s\u010d\u00edtaj\u00ed se. P\u0159ed specifikac\u00ed lo\u017eisek mezilehl\u00e9ho h\u0159\u00eddele v\u017edy nakreslete diagram geometrie \u0159et\u011bzu a vypo\u010d\u00edtejte v\u00fdsledn\u00fd vektor zat\u00ed\u017een\u00ed h\u0159\u00eddele. Tento krok se v praxi \u010dasto opom\u00edj\u00ed, co\u017e vede k poddimenzovan\u00fdm lo\u017eisk\u016fm mezilehl\u00e9ho h\u0159\u00eddele, kter\u00e1 sel\u017eou d\u0159\u00edve ne\u017e kter\u00fdkoli z \u0159et\u011bz\u016f.<\/p>\n

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

    Kde je v\u00fdpo\u010det po\u010dtu zub\u016f kritick\u00fdm krokem n\u00e1vrhu<\/h2>\n

    V\u00fdm\u011bna zem\u011bd\u011blsk\u00fdch stroj\u016f.<\/strong> P\u0159i v\u00fdm\u011bn\u011b po\u0161kozen\u00fdch nebo opot\u0159ebovan\u00fdch ozuben\u00fdch kol u star\u0161\u00edch stroj\u016f, u kter\u00fdch se ztratila dokumentace, je jedin\u00fdm zp\u016fsobem, jak ov\u011b\u0159it spr\u00e1vn\u00fd po\u010det zub\u016f, zm\u011b\u0159it p\u016fvodn\u00ed ozuben\u00e9 kolo (pokud je k dispozici), vypo\u010d\u00edtat p\u0159evodov\u00fd pom\u011br z nam\u011b\u0159en\u00e9ho po\u010dtu zub\u016f a porovnat jej s provozn\u00edmi parametry stroje. Nespr\u00e1vn\u00fd po\u010det zub\u016f m\u011bn\u00ed rychlost posuvu, rychlost dopravn\u00edku a rychlost ml\u00e1cen\u00ed zp\u016fsobem, kter\u00fd ovliv\u0148uje kvalitu plodiny a \u00fa\u010dinnost sklizn\u011b, sp\u00ed\u0161e ne\u017e aby zp\u016fsoboval okam\u017eit\u00e9 mechanick\u00e9 selh\u00e1n\u00ed \u2013 co\u017e zt\u011b\u017euje diagnostiku chyby. v\u00fdm\u011bny zem\u011bd\u011blsk\u00fdch \u0159et\u011bzov\u00fdch kol<\/a> Pokud je dokumentace ne\u00fapln\u00e1, za\u0161lete p\u016fvodn\u00ed po\u010det zub\u016f ozuben\u00e9ho kola a ot\u00e1\u010dky vstupn\u00edho a v\u00fdstupn\u00edho h\u0159\u00eddele a na\u0161i technici mohou potvrdit spr\u00e1vn\u00fd pom\u011br.<\/p>\n

    \u00daprava rychlosti dopravn\u00edku.<\/strong> Pokud je t\u0159eba zm\u011bnit rychlost dopravn\u00edkov\u00e9 linky \u2013 obvykle v r\u00e1mci zv\u00fd\u0161en\u00ed v\u00fdrobn\u00ed kapacity \u2013 nej\u00fasporn\u011bj\u0161\u00edm p\u0159\u00edstupem v syst\u00e9mu \u0159et\u011bzov\u00e9ho pohonu je zm\u011bna po\u010dtu zub\u016f hnan\u00e9ho \u0159et\u011bzov\u00e9ho kola. Zm\u011bna z hnan\u00e9ho \u0159et\u011bzov\u00e9ho kola 45T na 40T u st\u00e1vaj\u00edc\u00edho \u0159et\u011bzov\u00e9ho pohonu #60 s una\u0161e\u010dem 19T zvy\u0161uje rychlost dopravn\u00edku z 100% na 45\/40 = 112,5% p\u016fvodn\u00ed rychlosti. Rozte\u010d \u0159et\u011bzu a celkov\u00fd syst\u00e9m z\u016fst\u00e1vaj\u00ed nezm\u011bn\u011bny. Pro standardn\u00ed \u0159et\u011bzov\u00e1 kola s b\u011b\u017en\u00fdmi rozte\u010demi \u0159et\u011bzu<\/a>Zm\u011bnu po\u010dtu jednotliv\u00fdch zub\u016f lze obvykle prov\u00e9st v r\u00e1mci pl\u00e1novan\u00e9ho okna \u00fadr\u017eby s minim\u00e1ln\u00edmi prostoji.<\/p>\n

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

    Obtok p\u0159evodovky nebo zm\u011bna p\u0159evodov\u00e9ho pom\u011bru.<\/strong> U n\u011bkter\u00fdch pr\u016fmyslov\u00fdch pohon\u016f je p\u0159evodovka po\u0161kozena nebo se montuje nov\u00fd motor s jin\u00fdmi ot\u00e1\u010dkami uveden\u00fdmi na \u0161t\u00edtku. M\u00edsto v\u00fdm\u011bny p\u0159evodovky lze n\u011bkdy dos\u00e1hnout po\u017eadovan\u00fdch v\u00fdstupn\u00edch ot\u00e1\u010dek p\u0159\u00edmo nov\u00fdm p\u0159evodov\u00fdm pom\u011brem \u0159et\u011bzov\u00e9ho pohonu. Nap\u0159\u00edklad v\u00fdm\u011bna p\u0159evodovky 4:1 na dopravn\u00edku za p\u0159\u00edm\u00fd \u0159et\u011bzov\u00fd pohon s p\u0159evodov\u00fdm pom\u011brem 4:1 zcela eliminuje pot\u0159ebu \u00fadr\u017eby p\u0159evodovky. To je provediteln\u00e9 pouze tehdy, pokud rozsah \u0159et\u011bzov\u00e9ho pohonu a velikost \u0159et\u011bzu dok\u00e1\u017e\u00ed pojmout pln\u00fd jmenovit\u00fd to\u010div\u00fd moment \u2013 \u200b\u200bco\u017e vy\u017eaduje spln\u011bn\u00ed p\u011bti omezen\u00ed uveden\u00fdch v tomto \u010dl\u00e1nku.<\/p>\n

    <\/p>\n

    \u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
    \nJak bl\u00edzko mus\u00ed b\u00fdt skute\u010dn\u00fd pom\u011br c\u00edlov\u00e9mu? Jak\u00e1 tolerance je p\u0159ijateln\u00e1?<\/summary>\n
    P\u0159ijateln\u00e1 tolerance p\u0159evodu z\u00e1vis\u00ed v\u00fdhradn\u011b na po\u017eadavc\u00edch aplikace. Pro pohony dopravn\u00edk\u016f, kde rychlost ovliv\u0148uje pr\u016fchodnost: je typicky p\u0159ijateln\u00e1 hodnota \u00b15% \u2013 p\u0159evodov\u00fd pom\u011br \u0159et\u011bzov\u00e9ho pohonu ur\u010duje rychlost dopravn\u00edku a procesn\u00ed in\u017een\u00fdrstv\u00ed tuto odchylku obvykle toleruje. Pro pohony spojen\u00e9 se synchronizovan\u00fdmi stroji (kde p\u0159evodov\u00fd pom\u011br \u0159et\u011bzov\u00e9ho pohonu mus\u00ed odpov\u00eddat mechanick\u00e9mu \u010dasovac\u00edmu vztahu): \u00b11% nebo m\u00e9n\u011b \u2013 po\u010dty zub\u016f mus\u00ed b\u00fdt zvoleny tak, aby se dos\u00e1hlo velmi bl\u00edzk\u00e9ho p\u0159ibl\u00ed\u017een\u00ed k teoretick\u00e9mu p\u0159evodu. Pro pohony, kde ot\u00e1\u010dky v\u00fdstupn\u00edho h\u0159\u00eddele jsou p\u0159iv\u00e1d\u011bny do syst\u00e9mu regulace ot\u00e1\u010dek (frekven\u010dn\u00ed m\u011bni\u010d, servopohon): je p\u0159ijateln\u00e9 \u00b110%, proto\u017ee regul\u00e1tor ot\u00e1\u010dek kompenzuje chybu p\u0159evodu. P\u0159ed z\u00e1vazkem ke kombinaci po\u010dtu zub\u016f v\u017edy ov\u011b\u0159te toleranci ot\u00e1\u010dek poh\u00e1n\u011bn\u00e9ho stroje.<\/div>\n<\/details>\n
    \nZlep\u0161uje nebo sni\u017euje pou\u017eit\u00ed v\u011bt\u0161\u00edho po\u010dtu zub\u016f na obou ozuben\u00fdch kolech (stejn\u00fd pom\u011br, v\u011bt\u0161\u00ed po\u010det zub\u016f) v\u00fdkon pohonu?<\/summary>\n
    Zv\u00fd\u0161en\u00ed po\u010dtu zub\u016f na obou kolech p\u0159i zachov\u00e1n\u00ed stejn\u00e9ho p\u0159evodov\u00e9ho pom\u011bru zlep\u0161uje v\u00fdkon pohonu n\u011bkolika m\u011b\u0159iteln\u00fdmi zp\u016fsoby. V\u00edce zub\u016f na una\u0161e\u010di sni\u017euje kol\u00eds\u00e1n\u00ed rychlosti v d\u016fsledku polygon\u00e1ln\u00edho efektu. V\u00edce zub\u016f na obou ozuben\u00fdch kolech zvy\u0161uje pr\u016fm\u011bry rozte\u010dn\u00e9 kru\u017enice, co\u017e zvy\u0161uje rychlost \u0159et\u011bzu p\u0159i stejn\u00fdch ot\u00e1\u010dk\u00e1ch h\u0159\u00eddele \u2013 zv\u00fd\u0161en\u00ed rychlosti \u0159et\u011bzu zvy\u0161uje efektivn\u00ed p\u0159enosovou kapacitu (proto\u017ee v\u00fdkon = tah \u0159et\u011bzu \u00d7 rychlost). V\u00edce zub\u016f na obou ozuben\u00fdch kolech tak\u00e9 zvy\u0161uje po\u010det \u010dl\u00e1nk\u016f, kter\u00e9 jsou v kontaktu s ka\u017ed\u00fdm ozuben\u00fdm kolem sou\u010dasn\u011b, \u010d\u00edm\u017e se rozkl\u00e1d\u00e1 tahov\u00e9 zat\u00ed\u017een\u00ed na v\u00edce zub\u016f a sni\u017euje se kontaktn\u00ed nap\u011bt\u00ed na zub. Praktick\u00fdmi omezen\u00edmi pro \u201ezv\u011bt\u0161en\u00ed\u201c po\u010dtu zub\u016f jsou v\u00fdsledn\u00e9 vn\u011bj\u0161\u00ed pr\u016fm\u011bry ozuben\u00fdch kol (instala\u010dn\u00ed ob\u00e1lka) a zv\u00fd\u0161en\u00e1 rota\u010dn\u00ed setrva\u010dnost z v\u011bt\u0161\u00edch ozuben\u00fdch kol (co\u017e je d\u016fle\u017eit\u00e9 u vysokorychlostn\u00edch indexovac\u00edch pohon\u016f).<\/div>\n<\/details>\n
    \nJak vypo\u010d\u00edt\u00e1m d\u00e9lku \u0159et\u011bzu v \u010dl\u00e1nc\u00edch, kdy\u017e ov\u011b\u0159\u00edm po\u010det zub\u016f?<\/summary>\n
    D\u00e9lka \u0159et\u011bzu v \u010dl\u00e1nc\u00edch: L = (2C\/p) + (N1 + N2)\/2 + ((N2 \u2212 N1)\u00b2 \u00d7 p) \/ (4\u03c0\u00b2 \u00d7 C), kde C je osov\u00e1 vzd\u00e1lenost v mm, p je rozte\u010d \u0159et\u011bzu v mm, N1 je po\u010det una\u0161ec\u00edch zub\u016f a N2 je po\u010det hnan\u00fdch zub\u016f. V\u00fdsledek by m\u011bl b\u00fdt zaokrouhlen\u00fd na sud\u00e9 cel\u00e9 \u010d\u00edslo (aby se z\u00edskal standardn\u00ed spojovac\u00ed \u010dl\u00e1nek nam\u00edsto odsazen\u00e9ho polovi\u010dn\u00edho \u010dl\u00e1nku). Pot\u00e9 zp\u011btn\u011b vypo\u010d\u00edtejte skute\u010dnou osovou vzd\u00e1lenost ze zaokrouhlen\u00e9ho po\u010dtu \u010dl\u00e1nk\u016f pomoc\u00ed: C = (p\/4) \u00d7 {(L \u2212 (N1+N2)\/2) + \u221a[(L \u2212 (N1+N2)\/2)\u00b2 \u2212 8((N2\u2212N1)\/2\u03c0)\u00b2]}. T\u00edm se z\u00edsk\u00e1 kone\u010dn\u00e1 osov\u00e1 vzd\u00e1lenost pro pou\u017eit\u00ed v instalaci \u2013 obvykle v rozmez\u00ed n\u011bkolika milimetr\u016f od p\u016fvodn\u00ed konstruk\u010dn\u00ed hodnoty, upraven\u00e1 o rozsah nap\u00edn\u00e1n\u00ed nap\u00edna\u010de.<\/div>\n<\/details>\n
    \nM\u016f\u017ee \u0159et\u011bzov\u00fd pohon dos\u00e1hnout p\u0159esn\u00e9ho celo\u010d\u00edseln\u00e9ho pom\u011bru bez poru\u0161en\u00ed principu loveck\u00e9ho zubu?<\/summary>\n
    Ano \u2013 pokud jsou po\u010dty zub\u016f vz\u00e1jemn\u011b rovnocenn\u00e9 (NSD = 1), p\u0159esto\u017ee pom\u011br je celo\u010d\u00edseln\u00e1 aproximace. Nap\u0159\u00edklad 17:34 d\u00e1v\u00e1 p\u0159esn\u00fd pom\u011br 2:1, ale NSD(17,34) = 17 \u2013 princip loveck\u00e9ho zubu je poru\u0161en. Nicm\u00e9n\u011b 19:38 tak\u00e9 d\u00e1v\u00e1 2:1 s NSD(19,38) = 19. \u0158e\u0161en\u00edm pro pom\u011br 2:1 je pou\u017eit\u00ed 17:35 (pom\u011br 2,06:1, NSD=1) sp\u00ed\u0161e ne\u017e jak\u00e9koli kombinace, kde N2 = 2\u00d7N1. Princip loveck\u00e9ho zubu je d\u016fle\u017eit\u011bj\u0161\u00ed pro pohony s dlouhou \u017eivotnost\u00ed ne\u017e dosa\u017een\u00ed p\u0159esn\u00e9ho celo\u010d\u00edseln\u00e9ho pom\u011bru. U synchronizovan\u00fdch mechanick\u00fdch pohon\u016f, kde je geometricky nezbytn\u00fd p\u0159esn\u00fd pom\u011br 2:1 nebo 3:1 (nap\u0159. pohon \u010dasov\u00e1n\u00ed va\u010dkov\u00e9ho h\u0159\u00eddele), akceptujte omezen\u00ed NSD a spol\u00e9hejte se na \u010dast\u011bj\u0161\u00ed intervaly kontrol sp\u00ed\u0161e ne\u017e na mechanismus rozlo\u017een\u00ed loveck\u00e9ho zubu.<\/div>\n<\/details>\n

    <\/p>\n

    \n
    <\/div>\n
    \n
    N2 = N1 \u00d7 i \u2192 PD = p \/ sin(180\u00b0 \/ N) \u2192 OD \u2248 PD + 0,625p<\/div>\n

    Pot\u0159ebujete ozuben\u00e1 kola obroben\u00e1 podle vypo\u010d\u00edtan\u00e9ho po\u010dtu zub\u016f?<\/h2>\n

    Za\u0161lete n\u00e1m po\u017eadovan\u00fd p\u0159evod, ot\u00e1\u010dky h\u0159\u00eddele, dostupnou \u0161\u00ed\u0159ku \u0159et\u011bzu a rozte\u010d \u0159et\u011bzu \u2013 na\u0161i technici ov\u011b\u0159\u00ed kombinaci po\u010dtu zub\u016f s ohledem na v\u0161ech p\u011bt omezen\u00ed a p\u0159ed v\u00fdrobou potvrd\u00ed specifikace obr\u00e1b\u011bn\u00ed otvoru.<\/p>\n

    Proch\u00e1zet ozuben\u00e1 kola s vlastn\u00edm otvorem<\/a>
    \n    Ode\u0161lete sv\u016fj v\u00fdpo\u010det k posouzen\u00ed<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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

    i = N2 \/ N1 \u2192 n2 = n1 \u00d7 (N1 \/ N2) Jak vypo\u010d\u00edtat po\u010det zub\u016f \u0159et\u011bzov\u00e9ho kola pro libovoln\u00fd p\u0159evodov\u00fd pom\u011br V\u00fdb\u011br po\u010dtu zub\u016f \u0159et\u011bzov\u00e9ho kola zp\u011btn\u00fdm postupem od po\u017eadovan\u00e9ho p\u0159evodov\u00e9ho pom\u011bru, ot\u00e1\u010dek h\u0159\u00eddele nebo v\u00fdstupn\u00edho to\u010div\u00e9ho momentu \u2013 a n\u00e1sledn\u00fdm porovn\u00e1n\u00edm t\u011bchto po\u010dt\u016f s technick\u00fdmi omezen\u00edmi, kter\u00e1 ur\u010duj\u00ed, zda pohon [\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":[6634],"tags":[72,78,58],"class_list":["post-3335","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\/3335","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=3335"}],"version-history":[{"count":2,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3335\/revisions"}],"predecessor-version":[{"id":3337,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/posts\/3335\/revisions\/3337"}],"wp:attachment":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/media?parent=3335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/categories?post=3335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/tags?post=3335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}