{"id":1379,"date":"2021-01-15T08:04:00","date_gmt":"2021-01-15T08:04:00","guid":{"rendered":"http:\/\/worm-reducers.xyz\/?p=1379"},"modified":"2022-12-29T01:53:08","modified_gmt":"2022-12-29T01:53:08","slug":"conveyor-chain-selection","status":"publish","type":"post","link":"https:\/\/worm-reducers.xyz\/cs\/conveyor-chain-selection\/","title":{"rendered":"V\u00fdb\u011br dopravn\u00edho \u0159et\u011bzu"},"content":{"rendered":"

Zaveden\u00ed
Pro p\u0159esn\u00fd v\u00fdb\u011br dopravn\u00edkov\u00e9ho \u0159et\u011bzu je d\u016fle\u017eit\u00e9 pe\u010dliv\u00e9 posouzen\u00ed podm\u00ednek obklopuj\u00edc\u00edch dopravn\u00edk. Tato \u010d\u00e1st pojedn\u00e1v\u00e1 o z\u00e1kladn\u00edch aspektech pot\u0159ebn\u00fdch pro efektivn\u00ed v\u00fdb\u011br dopravn\u00edkov\u00e9ho \u0159et\u011bzu. V\u00e1le\u010dkov\u00e9 \u0159et\u011bzy se \u010dasto pou\u017e\u00edvaj\u00ed pro aplikace s lehk\u00fdm a\u017e st\u0159edn\u011b t\u011b\u017ek\u00fdm provozem s materi\u00e1ly. Environment\u00e1ln\u00ed probl\u00e9my mohou vy\u017eadovat pou\u017eit\u00ed speci\u00e1ln\u00edch komponent\u016f, povlak\u016f, maziv nebo dokonce schopnost pracovat bez dodate\u010dn\u00e9ho vn\u011bj\u0161\u00edho maz\u00e1n\u00ed.
Z\u00e1kladn\u00ed podrobnosti nezbytn\u00e9 pro rozmanitost \u0159et\u011bz\u016f
Typ \u0159et\u011bzov\u00e9ho dopravn\u00edku (jednotkov\u00fd nebo sypk\u00fd) v\u010detn\u011b dopravn\u00edho syst\u00e9mu (p\u0159\u00edslu\u0161enstv\u00ed, kore\u010dky, v\u00e9\u010dkov\u00e9 ty\u010de atd.).
Uspo\u0159\u00e1d\u00e1n\u00ed dopravn\u00edku, jako nap\u0159\u00edklad um\u00edst\u011bn\u00ed ozuben\u00fdch kol, p\u0159\u00edpadn\u00e9 sklony a po\u010det pou\u017eit\u00fdch pramen\u016f \u0159et\u011bzu (N).
Mno\u017estv\u00ed materi\u00e1lu (M v lbs\/ft nebo kN\/m) a druh dopravovan\u00e9ho materi\u00e1lu.
Odhadovan\u00e1 hmotnost sou\u010d\u00e1st\u00ed dopravn\u00edku (W v lbs\/ft nebo kN\/m) spolu s \u0159et\u011bzem, lat\u011bmi nebo p\u0159\u00edpadn\u00fdmi p\u0159\u00edslu\u0161enstv\u00edm.
Line\u00e1rn\u00ed rychlost \u0159et\u011bzce (S ve stop\u00e1ch\/min nebo m\/min).
Prost\u0159ed\u00ed, ve kter\u00e9m bude \u0159et\u011bz provozov\u00e1n, v\u010detn\u011b teploty, korozn\u00edch podm\u00ednek, stavu maz\u00e1n\u00ed atd.
Krok 1: Odhad nap\u011bt\u00ed v \u0159et\u011bzu
Pro odhad tahu dopravn\u00edku (Pest) a n\u00e1sledn\u011b nap\u011bt\u00ed \u0159et\u011bzu (Test) pou\u017eijte n\u00ed\u017ee uveden\u00fd vzorec. Pest = (M + W) x fx SF a
Test = \u0160k\u016fdce \/ N
f = Sou\u010dinitel t\u0159en\u00ed
SF = Faktor rychlosti
Druh\u00e1 f\u00e1ze: Prove\u010fte p\u0159edb\u011b\u017en\u00fd v\u00fdb\u011br \u0159et\u011bzce
Pou\u017eit\u00edm kontroln\u00ed hodnoty vytvo\u0159te p\u0159edb\u011b\u017en\u00fd sortiment v\u00fdb\u011brem \u0159et\u011bzce
jeho\u017e jmenovit\u00e9 pracovn\u00ed zat\u00ed\u017een\u00ed je v\u011bt\u0161\u00ed ve srovn\u00e1n\u00ed s vypo\u010d\u00edtanou kontroln\u00ed hodnotou. Tyto hodnoty jsou vhodn\u00e9 pro provoz dopravn\u00edku a li\u0161\u00ed se od hodnot uveden\u00fdch v tabulk\u00e1ch s p\u0159edn\u00ed stranou z katalogu, kter\u00e9 souvisej\u00ed s vyu\u017eit\u00edm pomalub\u011b\u017en\u00e9ho hnac\u00edho \u0159et\u011bzu.
Krom\u011b dostate\u010dn\u00e9 nosnosti mus\u00ed m\u00edt tyto \u0159et\u011bzy obecn\u011b ur\u010ditou rozte\u010d, aby vyhovovaly po\u017eadovan\u00e9 rozte\u010di upevn\u011bn\u00ed. Nap\u0159\u00edklad, pokud maj\u00ed b\u00fdt lamely p\u0159i\u0161roubov\u00e1ny k upevn\u011bn\u00ed po 0,5 palce, rozte\u010d zvolen\u00e9ho \u0159et\u011bzu by se m\u011bla d\u011blit na 1,5 palce. Mohl bych tedy pou\u017e\u00edt \u0159et\u011bz 40 mm (rozte\u010d 1\/2 palce) s upevn\u011bn\u00edm ka\u017edou t\u0159etinu, \u0159et\u011bz 60 mm (rozte\u010d 3\/4 palce) s upevn\u011bn\u00edm ka\u017edou sekundu, \u0159et\u011bz 120 mm (rozte\u010d 1-1\/2 palce) s upevn\u011bn\u00edm ka\u017edou rozte\u010d nebo dokonce \u0159et\u011bz C2060H (rozte\u010d 1-1\/2 palce) s upevn\u011bn\u00edm ka\u017edou rozte\u010d.
T\u0159et\u00ed f\u00e1ze: Dokon\u010den\u00ed v\u00fdb\u011bru \u2013 Ur\u010den\u00ed skute\u010dn\u00e9ho tahu dopravn\u00edku
Ihned po vytvo\u0159en\u00ed p\u0159edb\u011b\u017en\u00e9ho sortimentu jej mus\u00edme ov\u011b\u0159it v\u00fdpo\u010dtem
skute\u010dn\u00e9 nap\u011bt\u00ed \u0159et\u011bzu (T). Abychom to dokon\u010dili, mus\u00edme nejprve vypo\u010d\u00edtat skute\u010dn\u00fd tah dopravn\u00edku (P). Z va\u0161ich rozvr\u017een\u00ed uveden\u00fdch na p\u0159\u00edslu\u0161n\u00e9 stran\u011b t\u00e9to str\u00e1nky vyberte vhodn\u00fd vzorec a vypo\u010d\u00edtejte celkov\u00fd tah dopravn\u00edku. Upozor\u0148ujeme, \u017ee n\u011bkter\u00e9 dopravn\u00edky mohou b\u00fdt kombinac\u00ed horizont\u00e1ln\u00edch, \u0161ikm\u00fdch a vertik\u00e1ln\u00edch... v takov\u00e9m p\u0159\u00edpad\u011b ur\u010dete tah dopravn\u00edku v ka\u017ed\u00e9 jednotliv\u00e9 sekci a zapo\u010d\u00edt\u00e1vejte je dohromady.
F\u00e1ze \u010dty\u0159i: V\u00fdpo\u010det optim\u00e1ln\u00edho nap\u011bt\u00ed \u0159et\u011bzu
Maxim\u00e1ln\u00ed nap\u011bt\u00ed v \u0159et\u011bzu (T) se rovn\u00e1 ta\u017en\u00e9 s\u00edle dopravn\u00edku (P) vypo\u010d\u00edtan\u00e9 ve f\u00e1zi 3, d\u011blen\u00e9 po\u010dtem pramen\u016f nesouc\u00edch zat\u00ed\u017een\u00ed (N), nap\u0159\u00edklad slo\u017ekou rychlosti (SF) uvedenou v tabulce 2, v\u00edcepramenn\u00fdm faktorem. (MSF) prok\u00e1zan\u00fd v tabulce t\u0159i plus probl\u00e9m s teplotou (TF) prok\u00e1zan\u00fd v tabulce 4.
T = (P \/ N) x MSF x SF x TF
P\u00e1t\u00e1 f\u00e1ze: Zkontrolujte \u201ejmenovit\u00e9 provozn\u00ed zat\u00ed\u017een\u00ed\u201c v vybran\u00e9m \u0159et\u011bzci
Jmenovit\u00e9 pracovn\u00ed zat\u00ed\u017een\u00ed v\u00e1mi vybran\u00e9ho \u0159et\u011bzu by m\u011blo b\u00fdt vy\u0161\u0161\u00ed ne\u017e maxim\u00e1ln\u00ed nam\u00e1h\u00e1n\u00ed \u0159et\u011bzu (T) vypo\u010d\u00edtan\u00e9 ve f\u00e1zi 4 v\u00fd\u0161e. Tyto hodnoty jsou p\u0159ijateln\u00e9 pro provoz dopravn\u00edku, a proto se li\u0161\u00ed od hodnot uveden\u00fdch v tabulk\u00e1ch na za\u010d\u00e1tku katalogu, kter\u00e9 se vztahuj\u00ed k vyu\u017eit\u00ed n\u00edzkorychlostn\u00edch hnac\u00edch \u0159et\u011bz\u016f.
Krok \u0161est: Ov\u011b\u0159te \u201ep\u0159\u00edpustn\u00e9 zat\u00ed\u017een\u00ed v\u00e1le\u010dk\u016f\u201c na vybran\u00e9m \u0159et\u011bzu
U \u0159et\u011bz\u016f, kter\u00e9 se odvaluj\u00ed kolem v\u00e1le\u010dk\u016f \u0159et\u011bzu nebo na vysoce hodnocen\u00fdch v\u00e1le\u010dkov\u00fdch \u00fachytech, m\u016f\u017ee b\u00fdt nutn\u00e9 zkontrolovat povolen\u00e9 zat\u00ed\u017een\u00ed v\u00e1le\u010dk\u016f.
Pozn\u00e1mka: Zat\u00ed\u017een\u00ed v\u00e1lce je ur\u010deno:
Zat\u00ed\u017een\u00ed v\u00e1le\u010dk\u016f = Wr \/ Nr
Wr = Celkov\u00e1 hmotnost nesen\u00e1 v\u00e1le\u010dky
Nr = Po\u010det v\u00e1le\u010dk\u016f nesouc\u00edch nadm\u011brnou hmotnost.<\/p>","protected":false},"excerpt":{"rendered":"

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