{"id":1245,"date":"2026-04-27T06:13:11","date_gmt":"2026-04-27T06:13:11","guid":{"rendered":"https:\/\/worm-and-worm-wheel.com\/?p=1245"},"modified":"2026-04-27T06:13:11","modified_gmt":"2026-04-27T06:13:11","slug":"worm-gear-ratio-and-calculation-formulas-examples-real-cases","status":"publish","type":"post","link":"https:\/\/worm-and-worm-wheel.com\/cs\/worm-gear-ratio-and-calculation-formulas-examples-real-cases\/","title":{"rendered":"P\u0159evodov\u00fd pom\u011br \u0161nekov\u00e9ho p\u0159evodu a v\u00fdpo\u010det \u2013 vzorce, p\u0159\u00edklady, re\u00e1ln\u00e9 p\u0159\u00edpady"},"content":{"rendered":"
\n

P\u0159evodov\u00fd pom\u011br \u0161nekov\u00e9ho p\u0159evodu a v\u00fdpo\u010det \u2013 vzorce, p\u0159\u00edklady, re\u00e1ln\u00e9 p\u0159\u00edpady<\/h1>\n

Matematika za p\u00e1rem \u0161neku a \u0161nekov\u00e9ho kola, t\u0159i zpracovan\u00e9 p\u0159\u00edklady a realita celo\u010d\u00edseln\u00fdch zub\u016f, kter\u00e1 ni\u010d\u00ed \u010dist\u00e9 u\u010debnicov\u00e9 pom\u011bry.<\/p>\n

Promluvte si s in\u017een\u00fdrem \u2192<\/a><\/p>\n<\/div>\n

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Rychl\u00e1 odpov\u011b\u010f<\/div>\n

P\u0159evodov\u00fd pom\u011br \u0161nekov\u00e9ho p\u0159evodu je po\u010det zub\u016f kola d\u011blen\u00fd po\u010dtem z\u00e1b\u011br\u016f \u0161neku: i = Z\u2082 \/ Z\u2081. Jednochod\u00fd \u0161nek v z\u00e1b\u011bru s kolem se 40 zuby d\u00e1v\u00e1 pom\u011br 40:1. \u010cty\u0159chod\u00fd \u0161nek na stejn\u00e9m kole d\u00e1v\u00e1 pom\u011br 10:1. \u00da\u010dinnost je d\u00e1na \u00fahlem stoup\u00e1n\u00ed a \u00fahlem t\u0159en\u00ed pomoc\u00ed vzorce \u03b7 = tan(\u03bb) \/ tan(\u03bb + \u03c6) \u2013 obvykle 60 a\u017e 70 procent u jednochod\u00fdch pohon\u016f s vysok\u00fdm p\u0159evodov\u00fdm pom\u011brem, 85 a\u017e 92 procent u v\u00edcechod\u00fdch pohon\u016f s n\u00edzk\u00fdm p\u0159evodov\u00fdm pom\u011brem. Po\u017eadovan\u00fd vstupn\u00ed to\u010div\u00fd moment se rovn\u00e1 v\u00fdstupn\u00edmu to\u010div\u00e9mu momentu d\u011blen\u00e9mu (pom\u011br \u00d7 \u00fa\u010dinnost) a celo\u010d\u00edseln\u00fd po\u010det zub\u016f znamen\u00e1, \u017ee skute\u010dn\u00fd p\u0159evodov\u00fd pom\u011br je z\u0159\u00eddka p\u0159esn\u00fdm \u010d\u00edslem, kter\u00e9 jste zadali do specifikace.<\/p>\n<\/div>\n

Dva vzorce, ke kter\u00fdm se vrac\u00ed ka\u017ed\u00fd \u0161nekov\u00fd pohon<\/h2>\n

Zapome\u0148te na chv\u00edli na dlouh\u00e9 seznamy rovnic pro ur\u010dov\u00e1n\u00ed stoup\u00e1n\u00ed a modul\u016f. Dva vzorce ur\u010duj\u00ed 90 procent konstruk\u010dn\u00edch rozhodnut\u00ed o p\u00e1ru \u0161neku a \u0161nekov\u00e9ho kola a v\u011bt\u0161ina chyb ve v\u00fdpo\u010dtech v praxi poch\u00e1z\u00ed z nespr\u00e1vn\u00e9ho pou\u017eit\u00ed t\u011bchto dvou rovnic \u2013 nikoli z pokro\u010dil\u00e9 geometrie.<\/p>\n

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Vzorec 1 \u2014 Reduk\u010dn\u00ed pom\u011br (kinematick\u00fd)<\/p>\n

i = Z\u2082 \/ Z\u2081<\/p>\n

Kde Z\u2081 je po\u010det z\u00e1vit\u016f \u0161neku (1, 2, 3, 4, n\u011bkdy 6) a Z\u2082 je po\u010det zub\u016f kola. Toto je \u010dist\u00e1 geometrie \u2013 materi\u00e1l a mazivo do rovnice nevstupuj\u00ed.<\/p>\n

Vzorec 2 \u2013 Mechanick\u00e1 \u00fa\u010dinnost<\/p>\n

\u03b7 = tan(\u03bb) \/ tan(\u03bb + \u03c6)<\/p>\n

Kde \u03bb je \u00fahel stoup\u00e1n\u00ed \u0161neku (funkce po\u010dtu z\u00e1vit\u016f a pr\u016fm\u011bru stoup\u00e1n\u00ed \u0161neku) a \u03c6 je \u00fahel t\u0159en\u00ed kontaktu (5 a\u017e 8 stup\u0148\u016f pro dob\u0159e mazanou ocel na bronzu, 10 a\u017e 15 stup\u0148\u016f pro \u0161patn\u00e9 maz\u00e1n\u00ed). Zde vstupuje do hry materi\u00e1l, povrchov\u00e1 \u00faprava a chemick\u00e9 slo\u017een\u00ed maziva.<\/p>\n<\/div>\n

D\u016fvod, pro\u010d jsou tyto dva vzorce tak d\u016fle\u017eit\u00e9, je ten, \u017ee zachycuj\u00ed kl\u00ed\u010dov\u00fd kompromis \u0161nekov\u00e9ho p\u0159evodu \u2013 vysok\u00fd p\u0159evodov\u00fd pom\u011br znamen\u00e1 n\u00edzkou \u00fa\u010dinnost, n\u00edzk\u00fd p\u0159evodov\u00fd pom\u011br znamen\u00e1 vysokou \u00fa\u010dinnost a nelze m\u00edt oba ve stejn\u00e9 sad\u011b. Druh\u00fd vzorec vysv\u011btluje skryt\u00e9 n\u00e1klady prvn\u00edho.<\/p>\n

\"Sch\u00e9ma<\/p>\n

Spr\u00e1vn\u00e9 \u010dten\u00ed vzorce pro pom\u011br<\/h2>\n
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\n

Z\u2081 po\u010d\u00edt\u00e1 po\u010det zah\u00e1jen\u00ed spir\u00e1lov\u00e9ho z\u00e1vitu na \u0161neku \u2013 nikoli celkov\u00fd po\u010det vrchol\u016f z\u00e1vitu viditeln\u00fdch v jak\u00e9koli obvodov\u00e9 poloze. Pod\u00edvejte se na \u0161nekov\u00fd konec. Jednochod\u00fd \u0161nek ukazuje jeden z\u00e1vit spir\u00e1lovit\u011b vinut\u00fd po h\u0159\u00eddeli. Dvouchod\u00fd \u0161nek ukazuje dva z\u00e1vity vinut\u00e9 paraleln\u011b, posunut\u00e9 o 180 stup\u0148\u016f. \u010cty\u0159chod\u00fd \u0161nek ukazuje \u010dty\u0159i rovnob\u011b\u017en\u00e9 z\u00e1vity s rozte\u010d\u00ed 90 stup\u0148\u016f. Vizu\u00e1ln\u00edm vod\u00edtkem je po\u010det samostatn\u00fdch z\u00e1vit\u016f, kter\u00e9 m\u016f\u017eete vysledovat od jednoho konce \u0161neku k druh\u00e9mu.<\/p>\n

Z\u2082 po\u010d\u00edt\u00e1 zuby kola konven\u010dn\u00edm zp\u016fsobem \u2013 celkov\u00fd po\u010det zub\u016f po obvodu kola. Kolo se 40 zuby m\u00e1 40 zub\u016f. Z fyzik\u00e1ln\u00ed nutnosti je toto \u010d\u00edslo cel\u00e9; nem\u016f\u017eete m\u00edt 40,5 zub\u016f.<\/p>\n<\/div>\n

\"\"<\/div>\n<\/div>\n

Celo\u010d\u00edseln\u00e1 past, kter\u00e1 ni\u010d\u00ed \u010dist\u00e9 u\u010debnicov\u00e9 pom\u011bry<\/h3>\n

Jak Z\u2081, tak Z\u2082 mus\u00ed b\u00fdt cel\u00e1 \u010d\u00edsla a toto omezen\u00ed je d\u016fle\u017eit\u011bj\u0161\u00ed, ne\u017e v\u011bt\u0161ina kalkula\u010dek uzn\u00e1v\u00e1. Pokud z\u00e1kazn\u00edk po\u017eaduje \u201ep\u0159esn\u011b 35:1\u201c, na\u0161e technick\u00e9 odd\u011blen\u00ed mu mus\u00ed sd\u011blit, \u017ee dostane jeden ze t\u0159\u00ed nejbli\u017e\u0161\u00edch praktick\u00fdch pom\u011br\u016f: Z\u2082 = 35 s Z\u2081 = 1 d\u00e1v\u00e1 p\u0159esn\u011b 35:1, Z\u2082 = 70 s Z\u2081 = 2 d\u00e1v\u00e1 p\u0159esn\u011b 35:1 nebo Z\u2082 = 36 s Z\u2081 = 1 d\u00e1v\u00e1 36:1 (p\u0159ekro\u010den\u00ed o 2,9 procenta). Volba z\u00e1vis\u00ed na tom, co dal\u0161\u00edho aplikace pot\u0159ebuje \u2013 Z\u2082 = 35 je v po\u0159\u00e1dku pro pohon s jedn\u00edm chodem, Z\u2082 = 70 zdvojn\u00e1sobuje pr\u016fm\u011br kola ve stejn\u00e9m modulu a Z\u2082 = 36 je mal\u00fd kompromis, kter\u00fd umo\u017e\u0148uje pou\u017e\u00edt b\u011b\u017en\u011bj\u0161\u00ed velikost kola.<\/p>\n

Po\u017eadovat 35,5:1 jednodu\u0161e nefunguje \u2013 neexistuje \u017e\u00e1dn\u00e1 dvojice celo\u010d\u00edseln\u00fdch \u010d\u00edsel, kter\u00e1 by tento pom\u011br p\u0159esn\u011b poskytla. \u010cist\u00e9 \u010d\u00edslo na konstruk\u010dn\u00edm listu se mus\u00ed zaokrouhlit na hodnotu, kterou m\u016f\u017ee tov\u00e1rna skute\u010dn\u011b \u0159ezat. U korejsk\u00fdch a japonsk\u00fdch OEM aplikac\u00ed, kde n\u00e1sledn\u00e9 enkod\u00e9ry a ovl\u00e1d\u00e1n\u00ed motor\u016f p\u0159edpokl\u00e1daj\u00ed p\u0159esn\u00fd p\u0159evodov\u00fd pom\u011br, mus\u00ed k tomuto zaokrouhlen\u00ed doj\u00edt ve f\u00e1zi n\u00e1vrhu, nikoli a\u017e po v\u00fdrob\u011b d\u00edl\u016f.<\/p>\n

Jak \u00fa\u010dinnost vypl\u00fdv\u00e1 z \u00fahlu stoup\u00e1n\u00ed<\/h2>\n

\u00dahel stoup\u00e1n\u00ed \u03bb je \u00fahel mezi \u0161roubovic\u00ed z\u00e1vitu \u0161neku a rovinou kolmou k ose \u0161neku. U jednochod\u00e9ho \u0161neku s mal\u00fdm pr\u016fm\u011brem stoup\u00e1n\u00ed m\u016f\u017ee b\u00fdt \u03bb 3 a\u017e 5 stup\u0148\u016f. U \u010dty\u0159chod\u00e9ho \u0161neku se stejn\u00fdm pr\u016fm\u011brem stoup\u00e1n\u00ed a modulem se \u03bb zvy\u0161uje na 15 a\u017e 20 stup\u0148\u016f. Vztah je geometrick\u00fd: v\u00edce z\u00e1vit\u016f ve stejn\u00e9m modulu znamen\u00e1 strm\u011bj\u0161\u00ed \u0161roubovici.<\/p>\n

Dosad\u00edme-li \u010d\u00edsla do vzorce pro \u00fa\u010dinnost, dostaneme konkr\u00e9tn\u00ed v\u00fdsledek. P\u0159edpokl\u00e1dejme \u00fahel t\u0159en\u00ed \u03c6 = 6 stup\u0148\u016f, co\u017e je realistick\u00e9 pro dob\u0159e mazanou ocel na fosforov\u00e9m bronzu:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
\u00dahel stoup\u00e1n\u00ed \u03bb<\/th>\ntan(\u03bb)<\/th>\ntan(\u03bb + 6\u00b0)<\/th>\n\u03b7 (\u00fa\u010dinnost)<\/th>\nSamosvorn\u00e9?<\/th>\n<\/tr>\n<\/thead>\n
3\u00b0<\/strong><\/td>\n0.0524<\/td>\n0.1584<\/td>\n33%<\/td>\nAno (\u03bb < \u03c6)<\/td>\n<\/tr>\n
5\u00b0<\/strong><\/td>\n0.0875<\/td>\n0.1944<\/td>\n45%<\/td>\nHranice<\/td>\n<\/tr>\n
10\u00b0<\/strong><\/td>\n0.1763<\/td>\n0.2867<\/td>\n62%<\/td>\n\u017d\u00e1dn\u00fd<\/td>\n<\/tr>\n
15\u00b0<\/strong><\/td>\n0.2679<\/td>\n0.3839<\/td>\n70%<\/td>\n\u017d\u00e1dn\u00fd<\/td>\n<\/tr>\n
20\u00b0<\/strong><\/td>\n0.3640<\/td>\n0.4877<\/td>\n75%<\/td>\n\u017d\u00e1dn\u00fd<\/td>\n<\/tr>\n
25\u00b0<\/strong><\/td>\n0.4663<\/td>\n0.6009<\/td>\n78%<\/td>\n\u017d\u00e1dn\u00fd<\/td>\n<\/tr>\n
30\u00b0<\/strong><\/td>\n0.5774<\/td>\n0.7265<\/td>\n79%<\/td>\n\u017d\u00e1dn\u00fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Tvar k\u0159ivky je d\u016fle\u017eit\u00fd. Zm\u011bna \u00fahlu stoup\u00e1n\u00ed z 3\u00b0 na 10\u00b0 t\u00e9m\u011b\u0159 zdvojn\u00e1sob\u00ed \u00fa\u010dinnost. Zm\u011bna \u00fahlu z 20\u00b0 na 30\u00b0 sotva ovlivn\u00ed situaci. Ide\u00e1ln\u00ed hodnota pro vysoce \u00fa\u010dinn\u00e9 v\u00edcechod\u00e9 pohony se nach\u00e1z\u00ed kolem \u00fahlu stoup\u00e1n\u00ed 15 a\u017e 20 stup\u0148\u016f \u2013 p\u0159i dal\u0161\u00edm \u00fahlu se v\u00fdnosy sni\u017euj\u00ed a za\u010d\u00edn\u00e1 se ztr\u00e1cet \u0161\u00ed\u0159ka \u010dela kola, kter\u00e1 zaji\u0161\u0165uje provozuschopnost pohonu. V\u011bt\u0161ina katalogov\u00fdch p\u00e1r\u016f \u0161nekov\u00fdch kol a \u0161nekov\u00fdch kol je uspo\u0159\u00e1d\u00e1na ve dvou skupin\u00e1ch: 3 a\u017e 5 stup\u0148\u016f (samosvorn\u00e9 s vysok\u00fdm p\u0159evodov\u00fdm pom\u011brem) nebo 12 a\u017e 18 stup\u0148\u016f (pohon se st\u0159edn\u00ed \u00fa\u010dinnost\u00ed).<\/p>\n

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Pozn\u00e1mka k in\u017een\u00fdrsk\u00e9mu stolu<\/div>\n

Past, kterou v\u00edd\u00e1m \u010dasto: konstrukt\u00e9r si z katalogu v\u00fdrobce p\u0159e\u010dte \u201e\u03b7 = 70 procent\u201c a pro dimenzov\u00e1n\u00ed motoru s t\u00edm zach\u00e1z\u00ed jako s konstantou. Nen\u00ed tomu tak. \u010c\u00e1stka 70 procent je jmenovit\u00e1 \u00fa\u010dinnost p\u0159i jmenovit\u00e9m zat\u00ed\u017een\u00ed a jmenovit\u00fdch ot\u00e1\u010dk\u00e1ch. P\u0159i zat\u00ed\u017een\u00ed o jednu desetinu z\u016fst\u00e1v\u00e1 t\u0159ec\u00ed moment uvnit\u0159 p\u0159evodovky zhruba konstantn\u00ed, zat\u00edmco u\u017eite\u010dn\u00fd to\u010div\u00fd moment kles\u00e1 o deset procent \u2013 \u200b\u200bnam\u011b\u0159en\u00e1 \u00fa\u010dinnost m\u016f\u017ee klesnout pod 30 procent. V\u017edy dimenzujte podle skute\u010dn\u00e9ho provozn\u00edho bodu, nikoli podle typov\u00e9ho \u0161t\u00edtku. Pokud m\u00e1te v pracovn\u00edm cyklu pouze n\u00edzk\u00e9 zat\u00ed\u017een\u00ed, procento, kter\u00e9 byste m\u011bli zadat do v\u00fdpo\u010dtu vstupn\u00edho to\u010div\u00e9ho momentu, je \u010d\u00edslo p\u0159i \u010d\u00e1ste\u010dn\u00e9m zat\u00ed\u017een\u00ed, nikoli katalogov\u00e9 \u010d\u00edslo.<\/p>\n<\/div>\n

P\u0159\u00edklad 1 \u2013 Pohon dopravn\u00edho p\u00e1su<\/h2>\n
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Ploch\u00fd p\u00e1sov\u00fd dopravn\u00edk p\u0159epravuje 80 kg produktu rychlost\u00ed 0,5 m\/s po dr\u00e1ze dlouh\u00e9 40 m. Hnac\u00ed kladka m\u00e1 pr\u016fm\u011br 200 mm. Z\u00e1kazn\u00edk po\u017eaduje p\u0159eru\u0161ovan\u00fd provoz (40 procent zapnuto, 60 procent vypnuto) a tich\u00fd pohon. Samosvorn\u00fd mechanismus nen\u00ed nutn\u00fd, proto\u017ee p\u00e1s je vodorovn\u00fd.<\/p>\n

N\u00ed\u017ee uveden\u00fd n\u00e1vod ukazuje ka\u017ed\u00fd aritmetick\u00fd krok od s\u00edly p\u00e1su a\u017e po v\u00fdb\u011br motoru. Stejn\u00fd postup funguje pro jak\u00e9koli cvi\u010den\u00ed dimenzov\u00e1n\u00ed dopravn\u00edku \u2013 m\u011bn\u00ed se pouze vstupn\u00ed \u010d\u00edsla.<\/p>\n<\/div>\n

\"\"<\/div>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Krok<\/th>\nV\u00fdpo\u010det<\/th>\nV\u00fdsledek<\/th>\n<\/tr>\n<\/thead>\n
Po\u017eadovan\u00e1 rychlost \u0159emenice<\/strong><\/td>\n0,5 \u00f7 (\u03c0 \u00d7 0,2)<\/td>\n0,796 ot\/s = 47,7 ot\/min<\/td>\n<\/tr>\n
Ta\u017en\u00e1 s\u00edla \u0159emenu<\/strong><\/td>\n80 \u00d7 9,81 \u00d7 0,05 (\u03bc \u2248 0,05 v\u00e1lcov\u00e1n\u00ed p\u00e1su)<\/td>\n39 N<\/td>\n<\/tr>\n
To\u010div\u00fd moment kladky<\/strong><\/td>\n39 \u00d7 0,1 (polom\u011br)<\/td>\n3,9 N\u00b7m<\/td>\n<\/tr>\n
Pou\u017eijte servisn\u00ed faktor 1,5\u00d7<\/strong><\/td>\n3,9 \u00d7 1,5<\/td>\nV\u00fdstupn\u00ed to\u010div\u00fd moment 5,85 N\u00b7m<\/td>\n<\/tr>\n
Motor pick-upu \u2013 vstupn\u00ed ot\u00e1\u010dky 1 400 ot.\/min<\/strong><\/td>\ni = 1400 \/ 47,7<\/td>\n29,4 \u2192 zaokrouhleno na 30:1<\/td>\n<\/tr>\n
Vyberte Z\u2081, Z\u2082<\/strong><\/td>\nZ\u2081 = 2, Z\u2082 = 60 \u2192 30:1<\/td>\nV\u00edcen\u00e1sobn\u00fd start pro efektivitu<\/td>\n<\/tr>\n
Odhad efektivity<\/strong><\/td>\n\u03bb \u2248 9\u00b0, \u03c6 = 6\u00b0 \u2192 \u03b7 = 60%<\/td>\nRozumn\u00e9 pro dvoustop\u00fd pohon<\/td>\n<\/tr>\n
Po\u017eadovan\u00fd vstupn\u00ed to\u010div\u00fd moment<\/strong><\/td>\n5,85 \/ (30 \u00d7 0,60)<\/td>\n0,32 N\u00b7m<\/td>\n<\/tr>\n
V\u00fdb\u011br motoru<\/strong><\/td>\n0,18 kW p\u0159i 1 400 ot.\/min d\u00e1v\u00e1 to\u010div\u00fd moment 1,2 N\u00b7m<\/td>\n3,7\u00d7 bezpe\u010dnostn\u00ed rezerva, naddimenzovan\u00e1<\/td>\n<\/tr>\n
Kone\u010dn\u00e1 specifikace<\/strong><\/td>\nMotor 0,18 kW + \u0161nekov\u00e1 p\u0159evodovka 30:1<\/td>\nZ\u2081 = 2, Z\u2082 = 60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

V\u0161imn\u011bte si rozhodnut\u00ed o zaokrouhlen\u00ed v kroku 5 \u2013 p\u0159esn\u00fd aritmetick\u00fd pom\u011br je 29,4:1, ale nejbli\u017e\u0161\u00ed praktick\u00fd pom\u011br cel\u00e9ho \u010d\u00edsla k po\u010dtu zub\u016f je 30:1, co\u017e d\u00e1v\u00e1 m\u00edrn\u011b pomalej\u0161\u00ed rychlost p\u00e1su. Z\u00e1kazn\u00edk tento kompromis akceptoval bez viditeln\u00e9ho rozd\u00edlu na v\u00fdstupu dopravn\u00edku. To je u pr\u016fmyslov\u00fdch pohon\u016f b\u011b\u017en\u00e9.<\/p>\n

Praktick\u00fd p\u0159\u00edklad 2 \u2013 Pohon bubnu kladkostroje<\/h2>\n

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Mal\u00fd d\u00edlensk\u00fd zved\u00e1k zvedne a\u017e 500 kg na bubnu o polom\u011bru 100 mm. Rychlost zdvihu je specifikov\u00e1na na 6 m\/min. Samosvorn\u00fd mechanismus je povinn\u00fd, proto\u017ee padaj\u00edc\u00ed b\u0159emeno by p\u0159edstavovalo bezpe\u010dnostn\u00ed riziko. Z\u00e1kazn\u00edk chce pou\u017e\u00edt standardn\u00ed t\u0159\u00edf\u00e1zov\u00fd motor s ot\u00e1\u010dkami 1 400 ot\/min.<\/p>\n

Samosvorn\u00e9 mechanismy eliminuj\u00ed v\u00edcechod\u00e9 \u0161neky \u2013 jsme nuceni pou\u017e\u00edvat jednochodou konstrukci s n\u00edzk\u00fdm \u00fahlem stoup\u00e1n\u00ed a akceptovat tak ztr\u00e1tu \u00fa\u010dinnosti.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
Mno\u017estv\u00ed<\/th>\nHodnota<\/th>\nPozn\u00e1mka<\/th>\n<\/tr>\n<\/thead>\n
Zat\u011b\u017eovac\u00ed s\u00edla<\/strong><\/td>\n500 \u00d7 9,81 = 4 905 N<\/td>\nStatick\u00fd v\u00fdtah<\/td>\n<\/tr>\n
To\u010div\u00fd moment bubnu<\/strong><\/td>\n4 905 \u00d7 0,1 = 490,5 N\u00b7m<\/td>\nPou\u017eijte sou\u010dinitel provozu zdvihu 2,0 \u00d7 \u2192 981 N\u00b7m<\/td>\n<\/tr>\n
Ot\u00e1\u010dky bubnu<\/strong><\/td>\n6 \u00f7 (60 \u00d7 2\u03c0 \u00d7 0,1) \u00d7 60 = 9,55 ot\/min<\/td>\nPomal\u00fd v\u00fdstup<\/td>\n<\/tr>\n
Po\u017eadovan\u00fd pom\u011br<\/strong><\/td>\n1,400 \/ 9.55 = 146.6<\/td>\nZaokrouhleno na 150:1<\/td>\n<\/tr>\n
V\u00fdb\u011br zub\u016f<\/strong><\/td>\nZ\u2081 = 1, Z\u2082 = 150 (jednor\u00e1zov\u00fd start, n\u00edzk\u00e9 \u03bb)<\/td>\n\u03bb \u2248 3\u00b0 \u2192 samosvorn\u00e9<\/td>\n<\/tr>\n
\u00da\u010dinnost p\u0159i n\u00edzk\u00e9 \u03bb<\/strong><\/td>\n\u03b7 = tan(3\u00b0) \/ tan(9\u00b0) \u2248 33%<\/td>\nCena samosvorn\u00e9ho syst\u00e9mu<\/td>\n<\/tr>\n
Po\u017eadovan\u00fd vstupn\u00ed to\u010div\u00fd moment<\/strong><\/td>\n981 \/ (150 \u00d7 0,33) = 19,8 N\u00b7m<\/td>\nNa h\u0159\u00eddeli motoru<\/td>\n<\/tr>\n
V\u00fdkon motoru<\/strong><\/td>\nP = T \u00d7 \u03c9 = 19,8 \u00d7 146,6 = 2 902 W<\/td>\nZaokrouhleno na motor s v\u00fdkonem 3 kW<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Z tohoto v\u00fdpo\u010dtu vynikaj\u00ed dv\u011b v\u011bci. Zaprv\u00e9, sn\u00ed\u017een\u00ed \u00fa\u010dinnosti samosvoru je zna\u010dn\u00e9 \u2013 asi 67 procent vstupn\u00edho v\u00fdkonu se v pohonu zah\u0159eje. Zadruh\u00e9, po\u017eadavek na v\u00fdkon motoru (3 kW) je mnohem vy\u0161\u0161\u00ed, ne\u017e by stejn\u00e9 zat\u00ed\u017een\u00ed vy\u017eadovalo vysoce \u00fa\u010dinn\u00e9 spir\u00e1lov\u00e9 reduktory s pravo\u00fahl\u00fdm p\u0159evodem (mo\u017en\u00e1 1,5 kW). Z\u00e1kazn\u00edk plat\u00ed za samosvor dodate\u010dnou elekt\u0159inou po celou dobu \u017eivotnosti kladkostroje. Pro d\u00edlensk\u00fd kladkostroj provozovan\u00fd mo\u017en\u00e1 200 hodin ro\u010dn\u011b je tento kompromis p\u0159ijateln\u00fd. Pro 24hodinov\u00fd v\u00fdrobn\u00ed kladkostroj by to tak nebylo \u2013 spr\u00e1vnou odpov\u011bd\u00ed je spir\u00e1lov\u00fd reduktor a samostatn\u00e1 mechanick\u00e1 brzda.<\/p>\n

P\u0159\u00edklad 3 \u2013 Indexovac\u00ed oto\u010dn\u00fd st\u016fl<\/h2>\n

\u010cty\u0159polohov\u00fd indexovac\u00ed st\u016fl polohuje sva\u0159ovac\u00ed p\u0159\u00edpravky pro r\u00e1my automobilov\u00fdch sedadel. Ka\u017ed\u00e1 stanice m\u00e1 nosnost 12 kg, celkov\u00e1 hmotnost stolu 80 kg, polom\u011br stolu 400 mm. Doba indexov\u00e1n\u00ed na stanici je 1,2 sekundy (oto\u010den\u00ed o 90 stup\u0148\u016f). Udr\u017eovac\u00ed moment mezi pohyby mus\u00ed odol\u00e1vat n\u00e1hodn\u00e9mu postr\u010den\u00ed, ale samotn\u00fd pohon je elektricky dr\u017een servobrzdou \u2013 samosvorn\u00e9 je \u017e\u00e1douc\u00ed, ale nen\u00ed povinn\u00e9.<\/p>\n

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Tento v\u00fdpo\u010det je dynamick\u00fd, nikoli statick\u00fd. Dominantn\u00edm zat\u00ed\u017een\u00edm je zrychlen\u00ed hmoty stolu o 90 stup\u0148\u016f za 1,2 sekundy \u2013 vrchol to\u010div\u00e9ho momentu nast\u00e1v\u00e1 b\u011bhem zrychlen\u00ed, nikoli b\u011bhem ust\u00e1len\u00e9 rotace. Servopohony tak\u00e9 pot\u0159ebuj\u00ed men\u0161\u00ed v\u016fli ne\u017e p\u0159\u00edklady dopravn\u00edk\u016f nebo kladkostroj\u016f.<\/p>\n

Profil zrychlen\u00ed p\u0159edpokl\u00e1d\u00e1 troj\u00faheln\u00edkov\u00fd n\u00e1r\u016fst rychlosti \u2013 prvn\u00edch 0,6 sekundy zrychluje, posledn\u00edch 0,6 sekundy zpomaluje. Maxim\u00e1ln\u00ed \u00fahlov\u00e1 rychlost ve st\u0159edu je 2 \u00d7 0,785 rad \/ 1,2 s = 1,31 rad\/s. Maxim\u00e1ln\u00ed \u00fahlov\u00e9 zrychlen\u00ed je 1,31 \/ 0,6 = 2,18 rad\/s\u00b2.<\/p>\n<\/div>\n<\/div>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
Mno\u017estv\u00ed<\/th>\nV\u00fdpo\u010det<\/th>\nV\u00fdsledek<\/th>\n<\/tr>\n<\/thead>\n
Pol\u00e1rn\u00ed moment<\/strong><\/td>\nJ = (\u00bd) m r\u00b2 = 0,5 \u00d7 80 \u00d7 0,16 + 4 \u00d7 12 \u00d7 0,16<\/td>\n14,1 kg\u00b7m\u00b2<\/td>\n<\/tr>\n
Maxim\u00e1ln\u00ed akcelera\u010dn\u00ed to\u010div\u00fd moment<\/strong><\/td>\nT = J \u00d7 \u03b1 = 14,1 \u00d7 2,18<\/td>\n30,7 N\u00b7m<\/td>\n<\/tr>\n
Pou\u017eijte faktor r\u00e1z\u016f 1,8\u00d7<\/strong><\/td>\n30,7 \u00d7 1,8<\/td>\nV\u00fdstupn\u00ed to\u010div\u00fd moment 55,3 N\u00b7m<\/td>\n<\/tr>\n
V\u00fdstupn\u00ed ot\u00e1\u010dky p\u0159i maxim\u00e1ln\u00edm v\u00fdkonu<\/strong><\/td>\n1,31 rad\/s \u00d7 60 \/ 2\u03c0<\/td>\n12,5 ot.\/min.<\/td>\n<\/tr>\n
Po\u017eadovan\u00fd p\u0159evod (servopohon 3 000 ot.\/min.)<\/strong><\/td>\n3,000 \/ 12.5<\/td>\n240:1 p\u0159\u00edli\u0161 vysok\u00e9 \u2013 zvolte 60:1<\/td>\n<\/tr>\n
V\u00fdb\u011br zub\u016f<\/strong><\/td>\nZ\u2081 = 1, Z\u2082 = 60 \u2014 duplexn\u00ed \u0161nek pro v\u016fli<\/td>\n\u03bb \u2248 4\u00b0, t\u00e9m\u011b\u0159 samosvorn\u00e9<\/td>\n<\/tr>\n
Servo b\u011b\u017e\u00ed na 750 ot\/min<\/strong><\/td>\n750 \u00d7 1\/60 = v\u00fdstup 12,5 ot.\/min<\/td>\nV dosahu serva<\/td>\n<\/tr>\n
\u03b7 \u2248 45%<\/strong><\/td>\n55,3 \/ (60 \u00d7 0,45)<\/td>\nTo\u010div\u00fd moment serva 2,05 N\u00b7m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Shrnut\u00ed: dynamick\u00e9 indexovac\u00ed aplikace \u0159\u00edd\u00ed v\u00fdpo\u010det pomoc\u00ed akcelera\u010dn\u00edho momentu, nikoli ust\u00e1len\u00e9ho momentu. Pol\u00e1rn\u00ed moment setrva\u010dnosti samotn\u00e9ho stolu \u010dasto dominuje nad hmotnost\u00ed obrobku, zejm\u00e9na u t\u011b\u017ek\u00fdch ocelov\u00fdch oto\u010dn\u00fdch stol\u016f. V\u00fdb\u011br servopohonu mus\u00ed spl\u0148ovat po\u017eadavky na \u0161pi\u010dkov\u00fd moment, nikoli st\u0159edn\u00ed moment \u2013 \u200b\u200bpokud to nen\u00ed mo\u017en\u00e9, je to nej\u010dast\u011bj\u0161\u00ed d\u016fvod, pro\u010d se indexovac\u00ed prototypy zastav\u00ed b\u011bhem prvn\u00edho cyklu.<\/p>\n

\u010cast\u00e9 chyby ve v\u00fdpo\u010dtech, kter\u00e9 ni\u010d\u00ed n\u00e1vrhy<\/h2>\n

Matouc\u00ed se Z\u2081 a Z\u2082.<\/strong> P\u0159ekvapiv\u011b mnoho prvn\u00edch v\u00fdkres\u016f doraz\u00ed s prohozen\u00fdmi za\u010d\u00e1tky \u0161neku a zuby kola \u2013 n\u011bkdo napsal po\u010det zub\u016f kola tam, kde vzorec o\u010dek\u00e1v\u00e1, \u017ee \u0161nek za\u010dne. V\u00fdsledkem je vypo\u010d\u00edtan\u00fd pom\u011br 1\/40 m\u00edsto 40, co\u017e matematiku \u010din\u00ed absurdn\u00ed a n\u00e1vrh selh\u00e1v\u00e1. V\u017edy jasn\u011b ozna\u010dte: Z\u2081 pro \u0161nek, Z\u2082 pro kolo.<\/p>\n

Zapom\u00edn\u00e1 se d\u011blit \u00fa\u010dinnost\u00ed.<\/strong> Z\u00e1kladn\u00ed p\u0159evodov\u00fd pom\u011br ud\u00e1v\u00e1 kinematick\u00fd vztah mezi vstupn\u00edmi a v\u00fdstupn\u00edmi ot\u00e1\u010dkami. Pro p\u0159evod na to\u010div\u00fd moment je nutn\u00e9 vyd\u011blit \u00fa\u010dinnost\u00ed. Pokud vynech\u00e1te d\u011blitel \u00fa\u010dinnosti, ur\u010d\u00edte motor, kter\u00fd je p\u0159\u00edli\u0161 mal\u00fd. Pohon se p\u0159i jmenovit\u00e9m zat\u00ed\u017een\u00ed zastav\u00ed. Vstupn\u00ed to\u010div\u00fd moment = v\u00fdstupn\u00ed to\u010div\u00fd moment \u00f7 (pom\u011br \u00d7 \u00fa\u010dinnost), v\u017edy.<\/p>\n

Pojet\u00ed efektivity jako konstanty.<\/strong> Uveden\u00e1 jmenovit\u00e1 \u00fa\u010dinnost je p\u0159i jmenovit\u00e9m zat\u00ed\u017een\u00ed. \u00da\u010dinnost p\u0159i n\u00edzk\u00e9m zat\u00ed\u017een\u00ed je mnohem ni\u017e\u0161\u00ed, proto\u017ee t\u0159ec\u00ed moment uvnit\u0159 p\u0159evodovky z\u016fst\u00e1v\u00e1 zhruba konstantn\u00ed, zat\u00edmco u\u017eite\u010dn\u00fd to\u010div\u00fd moment se zmen\u0161uje. V\u017edy pou\u017e\u00edvejte \u00fa\u010dinnost v provozn\u00edm bod\u011b, nikoliv \u010d\u00edselnou hodnotu.<\/p>\n

Pou\u017eit\u00ed statick\u00e9ho momentu pro dynamick\u00e9 aplikace.<\/strong> Indexovac\u00ed stoly, kladkostroje s r\u00e1zov\u00fdm zat\u00ed\u017een\u00edm a jak\u00fdkoli pohon s \u010dast\u00fdmi cykly spou\u0161t\u011bn\u00ed a zastavov\u00e1n\u00ed mus\u00ed b\u00fdt dimenzov\u00e1ny na \u0161pi\u010dkov\u00fd akcelera\u010dn\u00ed moment, nikoli na ust\u00e1len\u00fd moment. \u0160pi\u010dkov\u00fd moment m\u016f\u017ee b\u00fdt 2 a\u017e 4n\u00e1sobkem ust\u00e1len\u00e9 hodnoty v z\u00e1vislosti na dob\u011b cyklu.<\/p>\n

Po\u017eadovan\u00e9 necelo\u010d\u00edseln\u00e9 pom\u011bry.<\/strong> Po\u017eadavek na pom\u011br 47,3:1 nem\u00e1 \u0159e\u0161en\u00ed. Ve f\u00e1zi n\u00e1vrhu zaokrouhlete na nejbli\u017e\u0161\u00ed praktick\u00fd pom\u011br zub\u016f k cel\u00e9mu \u010d\u00edslu. Pokud regul\u00e1tor za sebou vy\u017eaduje p\u0159esn\u00fd pom\u011br, nejprve navrhn\u011bte p\u0159evodov\u00fd pom\u011br a nechte regul\u00e1tor, aby se p\u0159izp\u016fsobil skute\u010dn\u00e9mu pom\u011bru.<\/p>\n

Zapom\u00edn\u00e1n\u00ed na faktor slu\u017eeb.<\/strong> Pohon dimenzovan\u00fd p\u0159esn\u011b na vypo\u010d\u00edtan\u00fd jmenovit\u00fd moment m\u00e1 nulovou rezervu pro kol\u00eds\u00e1n\u00ed s\u00ed\u0165ov\u00e9ho nap\u011bt\u00ed, st\u00e1rnut\u00ed, ob\u010dasn\u00e9 p\u0159et\u00ed\u017een\u00ed nebo tepeln\u00e9 cykly. P\u0159ed v\u00fdb\u011brem motoru a p\u0159evodovky pou\u017eijte servisn\u00ed faktor mezi 1,3 (lehk\u00e9 p\u0159eru\u0161ovan\u00e9 zat\u00ed\u017een\u00ed) a 2,5 (siln\u00e9 r\u00e1zov\u00e9 zat\u00ed\u017een\u00ed).<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
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\nOt\u00e1zka: Je p\u0159evodov\u00fd pom\u011br stejn\u00fd jako reduk\u010dn\u00ed pom\u011br?<\/summary>\n

Pro p\u00e1r \u0161neku a \u0161nekov\u00e9ho kola, kde je \u0161nek hnac\u00edm motorem, ano \u2013 p\u0159evodov\u00fd pom\u011br i = Z\u2082\/Z\u2081 se rovn\u00e1 reduk\u010dn\u00edmu pom\u011bru. V\u00fdstupn\u00ed h\u0159\u00eddel se oto\u010d\u00ed jednou za i ot\u00e1\u010dek vstupn\u00edho h\u0159\u00eddele. Ve vz\u00e1cn\u00fdch uspo\u0159\u00e1d\u00e1n\u00edch, kde kolo poh\u00e1n\u00ed \u0161nek (zp\u011btn\u011b poh\u00e1n\u011bn\u00e9 v\u00edcen\u00e1sobn\u00e9 konstrukce pou\u017e\u00edvan\u00e9 jako volnob\u011b\u017en\u00e9 spojky), z\u016fst\u00e1v\u00e1 vzorec pro p\u0159evodov\u00fd pom\u011br stejn\u00fd, ale kinematick\u00e1 interpretace se obrac\u00ed. Standardn\u00edm p\u0159\u00edpadem je \u0161nekov\u00e9 kolo a jedin\u00fd, kter\u00fd vy\u017eaduje jednozna\u010dn\u00e9 pojet\u00ed.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak se vypo\u010d\u00edt\u00e1 \u00fahel stoup\u00e1n\u00ed z rozm\u011br\u016f \u0161neku?<\/summary>\n

\u00dahel stoup\u00e1n\u00ed \u03bb = arctan( L \/ (\u03c0 \u00d7 d\u2081) ), kde L je stoup\u00e1n\u00ed (axi\u00e1ln\u00ed posun na ot\u00e1\u010dku = Z\u2081 \u00d7 axi\u00e1ln\u00ed stoup\u00e1n\u00ed) a d\u2081 je pr\u016fm\u011br stoup\u00e1n\u00ed \u0161neku. Pro 1chod\u00fd \u0161nek s axi\u00e1ln\u00ed stoup\u00e1n\u00edm 9,42 mm a pr\u016fm\u011brem stoup\u00e1n\u00ed 36 mm: L = 9,42 mm, \u03c0 \u00d7 d\u2081 = 113,1 mm, tak\u017ee \u03bb = arctan(9,42\/113,1) = 4,76\u00b0. V\u00edcechod\u00e9 \u0161neky maj\u00ed proporcion\u00e1ln\u011b v\u011bt\u0161\u00ed stoup\u00e1n\u00ed \u2013 2chod\u00fd se stejnou stoup\u00e1n\u00edm a pr\u016fm\u011brem by m\u011bl \u03bb = arctan(18,84\/113,1) = 9,46\u00b0.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00fd je typick\u00fd \u00fahel t\u0159en\u00ed u pr\u016fmyslov\u00fdch \u0161nekov\u00fdch p\u0159evodovek?<\/summary>\n

U dob\u0159e mazan\u00e9 oceli na fosforov\u00e9m bronzu se syntetick\u00fdm p\u0159evodov\u00fdm olejem je \u00fahel t\u0159en\u00ed \u03c6 zhruba 5 a\u017e 7 stup\u0148\u016f (\u03bc = 0,087 a\u017e 0,12). Pro miner\u00e1ln\u00ed olej p\u0159i st\u0159edn\u00ed teplot\u011b 7 a\u017e 9 stup\u0148\u016f. P\u0159i \u0161patn\u00e9m maz\u00e1n\u00ed nebo z\u00e1b\u011bhov\u00fdch podm\u00ednk\u00e1ch 10 a\u017e 15 stup\u0148\u016f. Kluzn\u00e1 rychlost ovliv\u0148uje t\u0159en\u00ed: p\u0159i velmi n\u00edzk\u00fdch rychlostech (pod 0,5 m\/s) dominuje mezn\u00ed maz\u00e1n\u00ed a \u03c6 se plaziv\u011b zvy\u0161uje; p\u0159i st\u0159edn\u00edch rychlostech (1 a\u017e 5 m\/s) hydrodynamick\u00e9 \u00fa\u010dinky sni\u017euj\u00ed \u03c6; p\u0159i velmi vysok\u00fdch rychlostech za\u010d\u00edn\u00e1 zah\u0159\u00edv\u00e1n\u00ed tla\u010dit \u03c6 zp\u011bt nahoru. V\u011bt\u0161ina pr\u016fmyslov\u00fdch kalkula\u010dek p\u0159edpokl\u00e1d\u00e1 jako odhad v prvn\u00edm pr\u016fchodu konstantn\u00edch 6 stup\u0148\u016f.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak z\u00edsk\u00e1m p\u0159esn\u00fd nestandardn\u00ed pom\u011br, nap\u0159\u00edklad 50,5:1?<\/summary>\n

Nem\u016f\u017eete \u2013 ne z jednoho \u0161nekov\u00e9ho p\u0159evodu a stupn\u011b \u0161nekov\u00e9ho kola. Pom\u011br Z\u2082\/Z\u2081 mus\u00ed b\u00fdt pom\u011br cel\u00fdch \u010d\u00edsel a 50,5 = 101\/2, tak\u017ee jedin\u00fdm jednostup\u0148ov\u00fdm \u0159e\u0161en\u00edm je Z\u2081 = 2, Z\u2082 = 101. Kolo se 101 zuby je neobvykl\u00e9, ale vyrobiteln\u00e9. B\u011b\u017en\u011bj\u0161\u00edm p\u0159\u00edstupem je pou\u017eit\u00ed dvou stup\u0148\u016f: \u0161nekov\u00e9ho stupn\u011b s pom\u011brem 50:1, po kter\u00e9m n\u00e1sleduje mal\u00fd \u010deln\u00ed nebo planetov\u00fd stupe\u0148 pro jemn\u00e9 dolad\u011bn\u00ed celkov\u00e9ho p\u0159evodu. Dvoustup\u0148ov\u00e9 pohony tak\u00e9 dosahuj\u00ed pom\u011br\u016f nad 200:1, kter\u00fdch \u017e\u00e1dn\u00e1 praktick\u00e1 jednostup\u0148ov\u00e1 \u0161nekov\u00e1 soukol\u00ed nem\u016f\u017ee \u010dist\u011b dos\u00e1hnout.<\/p>\n<\/details>\n

\nOt\u00e1zka: Pro\u010d jsou nam\u011b\u0159en\u00e9 hodnoty \u00fa\u010dinnosti ni\u017e\u0161\u00ed, ne\u017e p\u0159edpov\u00edd\u00e1 vzorec?<\/summary>\n

Vzorec \u03b7 = tan(\u03bb)\/tan(\u03bb+\u03c6) ud\u00e1v\u00e1 pouze \u00fa\u010dinnost z\u00e1b\u011bru ozuben\u00fdch kol. \u00dapln\u00e1 \u0161nekov\u00fd reduktor<\/a> m\u00e1 tak\u00e9 ztr\u00e1ty v lo\u017eisk\u00e1ch, odpor olejov\u00e9ho t\u011bsn\u011bn\u00ed a ztr\u00e1ty v\u00ed\u0159en\u00edm oleje, kter\u00e9 nejsou ve vzorci zahrnuty. Celkov\u00e1 \u00fa\u010dinnost pohonu je obvykle o 5 a\u017e 10 procentn\u00edch bod\u016f ni\u017e\u0161\u00ed ne\u017e \u010d\u00edslo z\u00e1b\u011bru ozuben\u00fdch kol. U jednotky s p\u0159edpokl\u00e1danou hodnotou \u03b7_mesh = 70 procent o\u010dek\u00e1vejte celkovou \u00fa\u010dinnost pohonu kolem 60 a\u017e 65 procent. Nam\u011b\u0159en\u00e9 hodnoty pod p\u0159edpov\u011bd\u00ed vzorce jsou norm\u00e1ln\u00ed a neznamenaj\u00ed probl\u00e9m.<\/p>\n<\/details>\n

\nOt\u00e1zka: M\u016f\u017ee se p\u0159evodov\u00fd pom\u011br \u0161nekov\u00e9ho p\u0159evodu v pr\u016fb\u011bhu \u010dasu m\u011bnit s opot\u0159eben\u00edm jednotky?<\/summary>\n

Ne \u2013 pom\u011br je d\u00e1n po\u010dtem zub\u016f a z\u016fst\u00e1v\u00e1 pevn\u00fd po celou dobu \u017eivotnosti sestavy. S opot\u0159eben\u00edm se m\u011bn\u00ed v\u016fle (mal\u00e1 rota\u010dn\u00ed v\u016fle mezi \u0161nekem a kolem p\u0159i reverzn\u00edm zat\u00ed\u017een\u00ed) a p\u0159\u00edpadn\u011b \u00fa\u010dinnost (proto\u017ee se m\u011bn\u00ed drsnost povrchu a stav maziva). Samotn\u00fd pom\u011br je geometrick\u00fd a nem\u011bnn\u00fd, dokud existuj\u00ed zuby i z\u00e1vity.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak p\u0159esn\u00e9 jsou tyto p\u0159edpov\u011bdi efektivity zalo\u017een\u00e9 na vzorc\u00edch?<\/summary>\n

Pro dimenzov\u00e1n\u00ed v prvn\u00edm pr\u016fchodu jsou predikce podle vzorce p\u0159esn\u00e9 s p\u0159esnost\u00ed \u00b15 procentn\u00edch bod\u016f, pokud zvol\u00edte realistick\u00fd \u00fahel t\u0159en\u00ed. Pro kone\u010dn\u00fd v\u00fdb\u011br motoru v kritick\u00fdch aplikac\u00edch si od dodavatele vy\u017e\u00e1dejte data z laboratorn\u00edch zkou\u0161ek \u2013 v\u011bt\u0161ina renomovan\u00fdch v\u00fdrobc\u016f, v\u010detn\u011b na\u0161eho, m\u016f\u017ee poskytnout nam\u011b\u0159en\u00e9 k\u0159ivky \u00fa\u010dinnosti p\u0159i v\u00edce bodech zat\u00ed\u017een\u00ed a ot\u00e1\u010dek. Vzorec je t\u00edm spr\u00e1vn\u00fdm n\u00e1strojem pro v\u010dasnou konstrukci; data z laboratorn\u00edch zkou\u0161ek jsou t\u00edm spr\u00e1vn\u00fdm n\u00e1strojem pro kone\u010dn\u00fd z\u00e1vazek.<\/p>\n<\/details>\n<\/div>\n

Aritmetika pro p\u00e1r \u0161neku a \u0161nekov\u00e9ho kola je p\u0159\u00edmo\u010dar\u00e1, ale ne\u00faprosn\u00e1. Pokud se z\u00e1kladn\u00ed vzorec pro p\u0159evodov\u00fd pom\u011br vytvo\u0159\u00ed \u0161patn\u011b, matematick\u00fd nesmysl je okam\u017eit\u011b viditeln\u00fd. Pokud se vypo\u010d\u00edt\u00e1 \u00fa\u010dinnost \u0161patn\u011b, pohon se ode\u0161le, p\u0159eh\u0159eje se, nedodr\u017e\u00ed z\u00e1ruku a chyba se skr\u00fdv\u00e1 m\u011bs\u00edce, dokud se neza\u010dnou objevovat v\u00fdnosy z pole. Dva vzorce na za\u010d\u00e1tku tohoto \u010dl\u00e1nku nesou v podstat\u011b ve\u0161kerou z\u00e1t\u011b\u017e \u2013 sta\u010d\u00ed je jen aplikovat v aktu\u00e1ln\u00edm provozn\u00edm bod\u011b s realistick\u00fdmi odhady t\u0159en\u00ed a zaokrouhlit na celo\u010d\u00edseln\u00fd po\u010det zub\u016f, kter\u00fd je tov\u00e1rna schopna skute\u010dn\u011b vyrobit.<\/p>\n

Pro korejsk\u00e9 a japonsk\u00e9 konstruk\u010dn\u00ed t\u00fdmy OEM, kter\u00e9 cht\u011bj\u00ed p\u0159ed schv\u00e1len\u00edm specifikac\u00ed motoru a p\u0159evodov\u00e9ho pom\u011bru zkontrolovat v\u00fdpo\u010det, provozuje na\u0161e technick\u00e9 odd\u011blen\u00ed p\u0159ehled v\u00fdpo\u010dtu p\u0159evodov\u00e9ho pom\u011bru \u0161nekov\u00e9ho p\u0159evodu<\/a> vzhledem k va\u0161emu pracovn\u00edmu cyklu, aplikuje realistickou \u00fa\u010dinnost v aktu\u00e1ln\u00edm provozn\u00edm bod\u011b a doporu\u010duje p\u00e1r zub\u016f, kter\u00fd m\u016f\u017ee v\u00fdrobce dodat ve standardn\u00ed katalogov\u00e9 dodac\u00ed lh\u016ft\u011b. Standardn\u00ed katalogov\u00e9 p\u0159evody od 5:1 do 100:1 jsou skladem v cel\u00e9m na\u0161em jednochod\u00e9 a v\u00edcechod\u00e9 \u0161nekov\u00e9 p\u0159evodovky<\/a> Pro moduly M1 a\u017e M8 a zak\u00e1zkov\u00e9 p\u0159evody mimo katalogov\u00fd rozsah se vyr\u00e1b\u011bj\u00ed na zak\u00e1zku dle v\u00fdkresu.<\/p>\n

\n

Pot\u0159ebujete zkontrolovat spr\u00e1vnost p\u0159evodov\u00e9ho pom\u011bru a dimenzov\u00e1n\u00ed motoru?<\/h3>\n

Za\u0161lete n\u00e1m sv\u016fj v\u00fdstupn\u00ed to\u010div\u00fd moment, v\u00fdstupn\u00ed ot\u00e1\u010dky a pracovn\u00ed cyklus. Provedeme kompletn\u00ed v\u00fdpo\u010det, doporu\u010d\u00edme celo\u010d\u00edseln\u00fd p\u00e1r zub\u016f a sd\u011bl\u00edme v\u00e1m, jak\u00fd v\u00fdkon motoru matematika skute\u010dn\u011b vy\u017eaduje \u2013 obvykle do jednoho korejsk\u00e9ho pracovn\u00edho dne.<\/p>\n

\u017d\u00e1dost o kontrolu v\u00fdpo\u010dtu \u2192<\/a><\/p>\n<\/div>\n

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

Worm Gear Ratio and Calculation \u2014 Formulas, Examples, Real Cases The arithmetic behind a worm and worm wheel pair, three worked examples, and the integer-tooth reality that ruins clean textbook ratios. Talk to an engineer \u2192 Quick Answer Worm gear ratio is the number of wheel teeth divided by the number of worm starts: i […]<\/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":[2821],"tags":[30,33],"class_list":["post-1245","post","type-post","status-publish","format-standard","hentry","category-worm-and-worm-wheel","tag-worm-gear","tag-worm-gear-worm"],"_links":{"self":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/comments?post=1245"}],"version-history":[{"count":2,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1245\/revisions"}],"predecessor-version":[{"id":1248,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1245\/revisions\/1248"}],"wp:attachment":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/media?parent=1245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/categories?post=1245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/tags?post=1245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}