{"id":1409,"date":"2026-06-29T03:38:00","date_gmt":"2026-06-29T03:38:00","guid":{"rendered":"https:\/\/worm-and-worm-wheel.com\/?p=1409"},"modified":"2026-06-29T03:38:00","modified_gmt":"2026-06-29T03:38:00","slug":"worm-and-worm-wheel-for-marine-winch-and-mooring-equipment","status":"publish","type":"post","link":"https:\/\/worm-and-worm-wheel.com\/cs\/worm-and-worm-wheel-for-marine-winch-and-mooring-equipment\/","title":{"rendered":"\u0160nek a \u0161nekov\u00e9 kolo pro n\u00e1mo\u0159n\u00ed navij\u00e1ky a kotv\u00edc\u00ed za\u0159\u00edzen\u00ed"},"content":{"rendered":"
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Korea Ever-Power \u00b7 Pr\u016fvodce aplika\u010dn\u00edm in\u017een\u00fdrstv\u00edm<\/p>\n

\u0160nek a \u0161nekov\u00e9 kolo pro n\u00e1mo\u0159n\u00ed navij\u00e1ky a kotv\u00edc\u00ed za\u0159\u00edzen\u00ed<\/h1>\n

Lo\u010f pro p\u0159epravu sypk\u00fdch n\u00e1klad\u016f o nosnosti 50 000 DWT kotv\u00edc\u00ed v p\u0159\u00edstavu dr\u017e\u00ed sv\u00e9 m\u00edsto proti proudu a v\u011btru pomoc\u00ed 8 kotevn\u00edch lan, z nich\u017e ka\u017ed\u00e9 je napnuto kotevn\u00edm navij\u00e1kem o s\u00edle 15 a\u017e 30 tun. \u0160nekov\u00e9 p\u0159evodovky uvnit\u0159 ka\u017ed\u00e9ho navij\u00e1ku dr\u017e\u00ed toto nap\u011bt\u00ed samosvorn\u00fdm mechanismem \u2013 nep\u0159etr\u017eit\u011b, ti\u0161e a bez pohonu motoru \u2013 zat\u00edmco soln\u00e1 mlha, v\u00fdfukov\u00e9 plyny z nafty a tropick\u00e9 slunce napadaj\u00ed v\u0161echny exponovan\u00e9 povrchy na palub\u011b. Pokud samosvorn\u00fd mechanismus sel\u017ee u jednoho navij\u00e1ku, lo\u010f se od kotvi\u0161t\u011b odklon\u00ed a zb\u00fdvaj\u00edc\u00edch 7 lan absorbuje asymetrick\u00e9 zat\u00ed\u017een\u00ed, kter\u00e9 je m\u016f\u017ee postupn\u011b zlomit.<\/p>\n

Promluvte si s in\u017een\u00fdrem lodn\u00edch pohon\u016f \u2192<\/a><\/p>\n<\/div>\n

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

N\u00e1mo\u0159n\u00ed navij\u00e1ky \u2013 kotevn\u00ed, n\u00e1kladn\u00ed a vle\u010dn\u00e9 \u2013 pou\u017e\u00edvaj\u00ed \u0161nekov\u00e9 p\u0159evody, proto\u017ee samosvorn\u00e9 mechanismy dr\u017e\u00ed nap\u011bt\u00ed lana bez samostatn\u00e9 brzdy (co\u017e je z\u00e1sadn\u00ed pro bezpe\u010dnost kotven\u00ed), vysok\u00fd p\u0159evodov\u00fd pom\u011br poskytuje mechanickou v\u00fdhodu pro nap\u00edn\u00e1n\u00ed t\u011b\u017ek\u00fdch kotevn\u00edch lan z kompaktn\u00edho motoru namontovan\u00e9ho na palub\u011b a geometrie \u0161nekov\u00e9ho p\u0159evodu se hod\u00ed do st\u00edsn\u011bn\u00fdch prostorov\u00fdch omezen\u00ed palubn\u00edch p\u0159edn\u00edch a z\u00e1\u010fov\u00fdch palub. Protokol ISO 12944 C5-M pro ochranu proti korozi je r\u00e1mec specifikac\u00ed, kter\u00fd mapuje korozivn\u00ed agresivitu mo\u0159sk\u00e9 atmosf\u00e9ry na materi\u00e1l \u0161nekov\u00e9ho p\u0159evodu, syst\u00e9m n\u00e1t\u011br\u016f a specifikaci t\u011bsn\u011bn\u00ed. C5-M (velmi vysok\u00e1 mo\u0159sk\u00e1 odolnost) vy\u017eaduje \u0161nek z nerezov\u00e9 oceli 316L nebo duplexn\u00ed nerez, kolo z nikl-hlin\u00edkov\u00e9ho bronzu, t\u0159\u00edvrstv\u00fd n\u00e1t\u011br (z\u00e1kladn\u00ed n\u00e1t\u011br s vysok\u00fdm obsahem zinku plus epoxid plus polyuretan) a t\u011bsn\u011bn\u00ed FKM \u2013 co\u017e zaji\u0161\u0165uje c\u00edlovou \u017eivotnost 25 let v nejagresivn\u011bj\u0161\u00edm prost\u0159ed\u00ed atmosf\u00e9rick\u00e9 koroze definovan\u00e9m normou. Pro v\u0161echny komponenty navij\u00e1k\u016f na komer\u010dn\u00edch plavidlech je vy\u017eadov\u00e1no schv\u00e1len\u00ed klasifika\u010dn\u00ed spole\u010dnost\u00ed (DNV, Lloyd's, BV, ABS).<\/p>\n<\/div>\n

Pro\u010d lodn\u00ed navij\u00e1ky pou\u017e\u00edvaj\u00ed \u0161nekov\u00e9 p\u0159evody<\/h2>\n
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Kotv\u00edc\u00ed navij\u00e1k mus\u00ed plnit dv\u011b funkce: natahovat kotv\u00edc\u00ed lano b\u011bhem kotven\u00ed (aktivn\u00ed, poh\u00e1n\u011bn\u00e9 motorem, 2 a\u017e 5 minut na lano) a udr\u017eovat nap\u011bt\u00ed lana po celou dobu st\u00e1n\u00ed na lev\u00e9 stran\u011b (pasivn\u00ed, s vypnut\u00fdm motorem, hodiny a\u017e t\u00fddny). \u0160nekov\u00fd p\u0159evod uvnit\u0159 navij\u00e1ku zaji\u0161\u0165uje oboj\u00ed: sn\u00ed\u017een\u00ed rychlosti s vysok\u00fdm to\u010div\u00fdm momentem pro ta\u017een\u00ed a samosvorn\u00e9 udr\u017een\u00ed nap\u011bt\u00ed pro levou lano. Nen\u00ed pot\u0159eba \u017e\u00e1dn\u00fd samostatn\u00fd brzdov\u00fd buben ani rohatkov\u00fd mechanismus \u2013 samosvorn\u00e1 geometrie udr\u017euje pln\u00e9 kotv\u00edc\u00ed nap\u011bt\u00ed neomezen\u011b dlouho.<\/p>\n

D\u00edky t\u00e9to dvoj\u00ed funkci je \u0161nekov\u00fd p\u0159evod standardem pro lodn\u00ed navij\u00e1ky nap\u0159\u00ed\u010d v\u0161emi typy plavidel \u2013 od pob\u0159e\u017en\u00edch ryb\u00e1\u0159sk\u00fdch lod\u00ed s 500 GT a\u017e po lod\u011b s n\u00edzk\u00fdm provozn\u00edm objemem (VLCC) s 300 000 DWT.<\/p>\n<\/div>\n

\"Princip<\/div>\n<\/div>\n
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Udr\u017eov\u00e1n\u00ed nap\u011bt\u00ed v kotven\u00ed<\/div>\n

Samosvorn\u00fd syst\u00e9m udr\u017e\u00ed 15 a\u017e 30 tun nap\u011bt\u00ed kotevn\u00edho lana na navij\u00e1k bez pohonu motoru. Nap\u011bt\u00ed se m\u011bn\u00ed v z\u00e1vislosti na p\u0159\u00edlivu a odlivu, proudu a v\u011btru \u2013 \u0161nekov\u00e9 kolo tyto dynamick\u00e9 v\u00fdkyvy ti\u0161e absorbuje. Pokud se plavidlo na vln\u011b zvedne, okam\u017eit\u00fd n\u00e1r\u016fst nap\u011bt\u00ed (a\u017e dvojn\u00e1sobek statick\u00e9ho nap\u011bt\u00ed) je absorbov\u00e1n samosvorn\u00fdm t\u0159en\u00edm, m\u00edsto aby byl p\u0159enesen na motor.<\/p>\n<\/div>\n

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Kompaktn\u00ed rozm\u011bry terasy<\/div>\n

Prostor na palub\u011b lod\u00ed pat\u0159\u00ed k nejomezen\u011bj\u0161\u00edm v jak\u00e9mkoli pr\u016fmyslov\u00e9m odv\u011btv\u00ed. D\u00edky 90stup\u0148ov\u00e9mu uspo\u0159\u00e1d\u00e1n\u00ed \u0161nekov\u00e9ho p\u0159evodu je motor um\u00edst\u011bn svisle pod bubnem navij\u00e1ku \u2013 co\u017e umo\u017e\u0148uje um\u00edst\u011bn\u00ed motoru do paluby o rozm\u011brech 600 \u00d7 800 mm, co\u017e by \u0159adov\u00e1 p\u0159evodovka srovnateln\u00e9ho v\u00fdkonu nedok\u00e1zala. Ka\u017ed\u00fd \u010dtvere\u010dn\u00ed metr paluby m\u00e1 konkuren\u010dn\u00ed n\u00e1roky na n\u00e1kladov\u00e9 poklopy, ventil\u00e1tory a p\u0159\u00edstup pro pos\u00e1dku.<\/p>\n<\/div>\n

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Schv\u00e1leno klasifika\u010dn\u00ed spole\u010dnost\u00ed<\/div>\n

Obchodn\u00ed plavidla vy\u017eaduj\u00ed, aby v\u0161echny palubn\u00ed stroje m\u011bly typov\u00e9 schv\u00e1len\u00ed klasifika\u010dn\u00ed spole\u010dnosti (DNV GL, Lloyd's Register, Bureau Veritas, ABS). \u0160nekov\u00e9 p\u0159evodovky mus\u00ed b\u00fdt navr\u017eeny, vyrobeny a testov\u00e1ny podle platn\u00fdch klasifika\u010dn\u00edch pravidel \u2013 v\u010detn\u011b certifikace materi\u00e1l\u016f, zat\u011b\u017eovac\u00edch zkou\u0161ek p\u0159i 1,5n\u00e1sobku jmenovit\u00e9 kapacity a dokumentovan\u00e9ho \u0159\u00edzen\u00ed kvality.<\/p>\n<\/div>\n<\/div>\n


\n\"\u0160nekov\u00e9<\/p>\n

Ochrana proti korozi ISO 12944 C5-M \u2013 specifikace pro p\u00e1r \u0161nekov\u00fdch p\u0159evod\u016f v mo\u0159sk\u00e9 atmosf\u00e9\u0159e<\/h2>\n

Norma ISO 12944 klasifikuje atmosf\u00e9rickou korozivitu do kategori\u00ed od C1 (velmi n\u00edzk\u00e1 \u2013 vyt\u00e1p\u011bn\u00e9 vnit\u0159n\u00ed prostory) do CX (extr\u00e9mn\u00ed \u2013 na mo\u0159i s p\u0159\u00edm\u00fdm kontaktem se slanou vodou). \u0160nekov\u00e9 p\u0159evody lodn\u00edch navij\u00e1k\u016f pracuj\u00ed v kategori\u00edch C4 a\u017e C5-M v z\u00e1vislosti na typu plavidla a provozn\u00ed oblasti. Protokol mapuje ka\u017edou kategorii s po\u017eadovan\u00fdmi specifikacemi materi\u00e1lu, povlaku a t\u011bsn\u011bn\u00ed pro c\u00edlovou \u017eivotnost 15 a\u017e 25 let.<\/p>\n

\n\n\n\n\n\n\n\n
T\u0159\u00edda ISO 12944<\/th>\nMo\u0159sk\u00e9 prost\u0159ed\u00ed<\/th>\nMateri\u00e1l \u010derv\u016f<\/th>\nKola z lehk\u00fdch slitin<\/th>\nN\u00e1t\u011brov\u00fd syst\u00e9m<\/th>\nC\u00edlov\u00fd \u017eivot<\/th>\n<\/tr>\n<\/thead>\n
C4 (vysok\u00fd)<\/td>\nVnitrozemsk\u00e1 vodn\u00ed cesta, chr\u00e1n\u011bn\u00fd p\u0159\u00edstav<\/td>\nNerezov\u00e1 ocel 304 nebo \u017e\u00e1rov\u011b pozinkovan\u00e1<\/td>\nHlin\u00edkov\u00fd bronz CuAl10Fe5Ni5<\/td>\nEpoxidov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br + polyuretanov\u00fd vrchn\u00ed n\u00e1t\u011br (200 \u00b5m DFT)<\/td>\n15 let<\/td>\n<\/tr>\n
C5-M (velmi vysok\u00e1 n\u00e1mo\u0159n\u00ed)<\/td>\nPaluba pob\u0159e\u017en\u00ed, oce\u00e1nsk\u00e9 lodi<\/td>\nNerezov\u00e1 ocel 316L<\/td>\nNAB nikl-hlin\u00edkov\u00fd bronz<\/td>\nZ\u00e1kladn\u00ed n\u00e1t\u011br s vysok\u00fdm obsahem zinku + epoxid + polyuretan (320 \u00b5m such\u00e9 vrstvy)<\/td>\n20 \u2013 25 let<\/td>\n<\/tr>\n
CX (extr\u00e9mn\u00ed)<\/td>\nPob\u0159e\u017en\u00ed plo\u0161ina, z\u00f3na st\u0159\u00edkaj\u00edc\u00ed vody<\/td>\n2205 duplexn\u00ed nerezov\u00e1 ocel nebo Monel<\/td>\nNAB (MIL-spec) + katodick\u00e1 ochrana<\/td>\n\u017d\u00e1rov\u00e9 n\u00e1st\u0159ikov\u00e9 lakov\u00e1n\u00ed zinku\/hlin\u00edku + ut\u011bsn\u011bn\u00fd epoxid (500 \u00b5m DFT)<\/td>\n25+ let<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

N\u00e1klady se z kategorie C4 na CX zv\u00fd\u0161\u00ed p\u0159ibli\u017en\u011b 3 a\u017e 5kr\u00e1t \u2013 a to p\u0159edev\u0161\u00edm kv\u016fli materi\u00e1lu (316L na duplex\/Monel), slo\u017eitosti povrchov\u00e9 \u00fapravy (dvouvrstv\u00e1 na tepeln\u011b n\u00e1st\u0159ikovou s epoxidovou vrstvou) a dokumentaci pot\u0159ebn\u00e9 pro klasifikaci na mo\u0159i (z\u00e1t\u011b\u017eov\u00e9 zkou\u0161ky, kontrola povrchov\u00e9 \u00fapravy t\u0159et\u00ed stranou, sledovatelnost materi\u00e1lu dle normy EN 10204 3.1). Navij\u00e1k pro vnitrozemsk\u00fd trajekt v kategorii C4 stoj\u00ed zhruba 1 200 USD za p\u00e1r \u0161nekov\u00fdch kol; navij\u00e1k pro kotven\u00ed na mo\u0159sk\u00fdch plo\u0161in\u00e1ch v kategorii CX stoj\u00ed 4 000 a\u017e 6 000 USD za ekvivalentn\u00ed to\u010div\u00fd moment.<\/p>\n

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Prost\u0159ed\u00ed soln\u00e9 mlhy a vibrace paluby lodi<\/h2>\n

\"Ut\u011bsn\u011bn\u00e9<\/p>\n

Soln\u00e1 mlha jako nep\u0159etr\u017eit\u00e1 korozivn\u00ed expozice.<\/strong> Zaoce\u00e1nsk\u00e9 lod\u011b \u010del\u00ed neust\u00e1l\u00e9mu usazov\u00e1n\u00ed soln\u00e9 mlhy na palubn\u00edm vybaven\u00ed \u2013 koncentrace soli ve vzduchu na \u00farovni paluby je 50 a\u017e 300 mg\/m\u00b2\/den (m\u011b\u0159eno rychlost\u00ed ukl\u00e1d\u00e1n\u00ed chlorid\u016f dle normy ISO 9225). Tento soln\u00fd film v kombinaci s vysokou vlhkost\u00ed (80 a\u017e 100 procent relativn\u00ed vlhkosti na mo\u0159i) vytv\u00e1\u0159\u00ed na ka\u017ed\u00e9m exponovan\u00e9m kovov\u00e9m povrchu vrstvu elektrolytu, kter\u00e1 zp\u016fsobuje neust\u00e1lou elektrochemickou korozi. Standardn\u00ed uhl\u00edkov\u00e1 ocel koroduje v podm\u00ednk\u00e1ch C5-M rychlost\u00ed 0,4 a\u017e 0,8 mm za rok \u2013 tlou\u0161\u0165ka st\u011bny standardn\u00ed sk\u0159\u00edn\u011b \u0161nekov\u00e9ho p\u0159evodu se spot\u0159ebov\u00e1v\u00e1 b\u011bhem 5 a\u017e 8 let. N\u00e1t\u011brov\u00fd syst\u00e9m dle normy ISO 12944 vytv\u00e1\u0159\u00ed bari\u00e9ru mezi soln\u00fdm elektrolytem a ocelov\u00fdm podkladem \u2013 ale n\u00e1t\u011br mus\u00ed b\u00fdt udr\u017eov\u00e1n (oprava jak\u00e9hokoli po\u0161kozen\u00ed b\u011bhem pravideln\u00e9 \u00fadr\u017eby lodi), aby se bari\u00e9ra udr\u017eela po celou dobu c\u00edlov\u00e9 \u017eivotnosti 20 a\u017e 25 let.<\/p>\n

Vibrace paluby lodi.<\/strong> \u0160nekov\u00e9 p\u0159evody v lodn\u00edch motorech za\u017e\u00edvaj\u00ed nep\u0159etr\u017eit\u00e9 vibrace od hlavn\u00edho motoru lodi (10 a\u017e 25 Hz p\u0159i 0,5 a\u017e 3 mm\/s), pomocn\u00fdch gener\u00e1tor\u016f (25 a\u017e 50 Hz) a vln\u011bn\u00ed trupu (0,1 a\u017e 1 Hz s n\u00edzkou amplitudou, ale vysok\u00fdm v\u00fdtlakem). Tyto vibrace nezp\u016fsobuj\u00ed ostr\u00e9 p\u0159echodov\u00e9 jevy jako u t\u011b\u017eebn\u00edch drti\u010d\u016f (\u010dl\u00e1nek A26), ale jsou nep\u0159etr\u017eit\u00e9 \u2013 24 hodin denn\u011b na mo\u0159i. Vliv na \u0161nekov\u00fd p\u0159evod spo\u010d\u00edv\u00e1 v korozi zp\u016fsoben\u00e9 t\u0159en\u00edm na kontaktn\u00edch ploch\u00e1ch zub\u016f b\u011bhem dlouh\u00fdch obdob\u00ed, kdy navij\u00e1k nen\u00ed v provozu (kotv\u00edc\u00ed \u00fachyt nebo ulo\u017een\u00ed na mo\u0159i). Pou\u017eit\u00ed p\u0159\u00edsady proti t\u0159en\u00ed v mazivu nebo pravideln\u00e9 ru\u010dn\u00ed ot\u00e1\u010den\u00ed (jedna cel\u00e1 ot\u00e1\u010dka bubnu t\u00fddn\u011b b\u011bhem plavby po mo\u0159i) zabra\u0148uje po\u0161kozen\u00ed t\u0159en\u00edm b\u011bhem del\u0161\u00edch obdob\u00ed mimo provoz.<\/p>\n

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

Korejsk\u00e1 lod\u011bnice, kter\u00e1 stav\u00ed s\u00e9rii 8 pob\u0159e\u017en\u00edch lod\u00ed na p\u0159epravu sypk\u00fdch n\u00e1klad\u016f (12 000 DWT), specifikovala p\u00e1ry \u0161nekov\u00fdch kol pro p\u0159edn\u00ed kotevn\u00ed navij\u00e1ky \u2013 4 navij\u00e1ky na plavidlo, celkem 32 p\u00e1r\u016f. P\u016fvodn\u00ed specifikace pou\u017e\u00edvala 304 nerezov\u00fdch \u0161nek\u016f s hlin\u00edkov\u011b bronzov\u00fdmi koly a dvouvrstv\u00fd epoxidovo-polyuretanov\u00fd povlak s tlou\u0161\u0165kou such\u00e9ho materi\u00e1lu 200 \u00b5m \u2013 vhodn\u00e9 pro C4 (chr\u00e1n\u011bn\u00fd p\u0159\u00edstav), ale nedostate\u010dn\u011b specifikovan\u00e9 pro skute\u010dn\u00e9 provozn\u00ed prost\u0159ed\u00ed (korejsk\u00e9 pob\u0159e\u017en\u00ed vody, C5-M). Po 5 letech provozu t\u0159et\u00ed plavidlo hl\u00e1silo b\u011bhem sez\u00f3ny tajfun\u016f poruchu samosvoru kotevn\u00edho navij\u00e1ku \u2013 p\u00e1r \u0161nekov\u00fdch kol zkorodoval do t\u00e9 m\u00edry, \u017ee se zm\u011bnil koeficient t\u0159en\u00ed (d\u016flkov\u00e1 koroze na z\u00e1vitu \u0161neku zm\u011bnila geometrii kontaktu), co\u017e sn\u00ed\u017eilo spolehlivost samosvoru p\u0159i vysok\u00fdch tahov\u00fdch zat\u00ed\u017een\u00edch. Kontrola v\u0161ech 32 p\u00e1r\u016f nap\u0159\u00ed\u010d flotilou zjistila 9 p\u00e1r\u016f s m\u011b\u0159itelnou d\u016flkovou koroz\u00ed na z\u00e1vitu \u0161neku \u2013 v\u0161ech 9 m\u011blo poru\u0161en\u00ed povlaku na rozhran\u00ed t\u011bsn\u011bn\u00ed h\u0159\u00eddele (nejslab\u0161\u00ed m\u00edsto z hlediska vnik\u00e1n\u00ed soli). N\u00e1pravn\u00e1 opat\u0159en\u00ed pro celou flotilu: vym\u011bnit v\u0161ech 32 p\u00e1r\u016f \u0161nekov\u00fdch kol za \u0161neky z oceli 316L, kolo NAB a upgradovat na t\u0159\u00edvrstv\u00fd povlak s vysok\u00fdm obsahem zinku, epoxidu a polyuretanu s tlou\u0161\u0165kou such\u00e9ho filmu 320 \u00b5m (specifikace C5-M). Vym\u011bnit v\u0161echna h\u0159\u00eddelov\u00e1 t\u011bsn\u011bn\u00ed za t\u011bsn\u011bn\u00ed FKM s dvojit\u00fdm b\u0159item. N\u00e1klady na v\u00fdm\u011bnu jednoho p\u00e1ru: 1 850 USD (oproti p\u016fvodn\u00edm 980 USD). Celkov\u00e1 modernizace flotily: 59 200 USD. Rozd\u00edl 870 USD na p\u00e1r mezi specifikac\u00ed C4 a C5-M \u2013 27 840 USD nap\u0159\u00ed\u010d flotilou \u2013 by zabr\u00e1nil v\u00fdm\u011bn\u011b za 59 200 USD plus odhadovan\u00fdch 120 000 USD za nouzov\u00e9 dokov\u00e1n\u00ed. Pou\u010den\u00ed: pob\u0159e\u017en\u00ed plavidla provozovan\u00e1 na otev\u0159en\u00e9 vod\u011b maj\u00ed specifikaci C5-M, nikoli C4 \u2013 i kdy\u017e kotv\u00ed prim\u00e1rn\u011b v chr\u00e1n\u011bn\u00fdch p\u0159\u00edstavech. Specifikaci p\u00e1ru \u0161nekov\u00fdch kol ur\u010duje vystaven\u00ed korozi na mo\u0159i, nikoli um\u00edst\u011bn\u00ed kotvi\u0161t\u011b.<\/p>\n<\/div>\n

<\/p>\n

T\u0159i p\u0159\u00edpady specifikace p\u00e1ru \u0161nekov\u00fdch p\u0159evod\u016f pro n\u00e1mo\u0159n\u00ed navij\u00e1ky<\/h2>\n

\"\u0160nekov\u00fd<\/p>\n

P\u0159\u00edpad 1 \u2013 Korejsk\u00e1 lod\u011bnice: kotv\u00edc\u00ed navij\u00e1ky pro lod\u011b sypk\u00fdch materi\u00e1l\u016f o nosnosti 50 000 DWT, C5-M, schv\u00e1len\u00e9 t\u0159\u00eddy<\/h3>\n

Korejsk\u00e1 lod\u011bnice specifikovala \u0161nekov\u00e9 p\u0159evody pro 8 kotevn\u00edch navij\u00e1k\u016f (4 vp\u0159edu, 4 vzadu) na lodi na p\u0159epravu sypk\u00fdch materi\u00e1l\u016f o nosnosti 50 000 DWT pro mezin\u00e1rodn\u00ed obchodn\u00ed trasy. Tah kotevn\u00edho lana: 15 tun na navij\u00e1k. Rychlost bubnu: rychlost lana 8 m\/min. Motor: 30 kW, 1 450 ot\/min. P\u0159evodov\u00fd pom\u011br \u0161nekov\u00e9ho p\u0159evodu: 35:1. V\u00fdstupn\u00ed to\u010div\u00fd moment na h\u0159\u00eddeli bubnu: 8 500 N\u00b7m. Samosvorn\u00e1 p\u0159\u00eddr\u017en\u00e1 s\u00edla: 12 750 N\u00b7m (1,5 \u00d7 jmenovit\u00e1 dle pravidel DNV). Klasifikace: Typov\u011b schv\u00e1leno DNV GL. Materi\u00e1l: \u0160nek z nerezov\u00e9 oceli 316L (oce\u00e1nsk\u00fd C5-M), kolo z nikl-hlin\u00edkov\u00e9ho bronzu NAB. Povrchov\u00e1 \u00faprava: z\u00e1kladn\u00ed n\u00e1t\u011br s vysok\u00fdm obsahem zinku 80 \u00b5m + epoxidov\u00fd mezin\u00e1t\u011br 120 \u00b5m + polyuretanov\u00fd vrchn\u00ed n\u00e1t\u011br 120 \u00b5m = celkov\u00e1 DFT 320 \u00b5m. T\u011bsn\u011bn\u00ed: Dvoub\u0159itov\u00e9 FKM, IP66, s labyrintem napln\u011bn\u00fdm tukem. Olej: Miner\u00e1ln\u00ed EP olej lodn\u00ed kvality ISO VG 460 s inhibitorem koroze. Cena za p\u00e1r \u0161nekov\u00fdch kol: 2 400 USD. Celkem za 8 navij\u00e1k\u016f: 19 200 USD. Projektovan\u00e1 \u017eivotnost plavidla 25 let vy\u017eaduje jednu v\u00fdm\u011bnu \u0161nekov\u00e9ho kola v polovin\u011b \u017eivotnosti (p\u0159i 12. a\u017e 15. roce ulo\u017een\u00ed do such\u00e9ho doku) a pololetn\u00ed opravu n\u00e1t\u011bru na t\u011bsnic\u00edch rozhran\u00edch.<\/p>\n

P\u0159\u00edpad 2 \u2013 Japonsk\u00fd hlubinn\u00fd trawler: navij\u00e1k vle\u010dn\u00e9 s\u00edt\u011b, vysok\u00fd pracovn\u00ed cyklus, riziko pono\u0159en\u00ed do soli<\/h3>\n

Japonsk\u00fd v\u00fdrobce ryb\u00e1\u0159sk\u00fdch plavidel specifikoval p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f pro 2 vle\u010dn\u00e9 navij\u00e1ky na hlubinn\u00e9m trawleru o nosnosti 500 GT. Vle\u010dn\u00e9 navij\u00e1ky se od kotevn\u00edch navij\u00e1k\u016f li\u0161\u00ed pracovn\u00edm cyklem: vle\u010dn\u00fd navij\u00e1k t\u00e1hne ryb\u00e1\u0159skou s\u00ed\u0165 (5 a\u017e 15 tun) 8 a\u017e 12kr\u00e1t za 24hodinov\u00fd ryb\u00e1\u0159sk\u00fd den \u2013 mnohem aktivn\u011bji ne\u017e kotevn\u00ed navij\u00e1k, kter\u00fd se zapojuje jednou za zast\u00e1vku v p\u0159\u00edstavu. Tah bubnu: 12 tun. Rychlost plavby: 30 m\/min (rychlej\u0161\u00ed ne\u017e p\u0159i kotven\u00ed \u2013 \u010das str\u00e1ven\u00fd na lovn\u00e9m m\u00edst\u011b je produk\u010dn\u00edm \u010dasem). Motor: hydraulick\u00fd o v\u00fdkonu 45 kW. P\u0159evodov\u00fd pom\u011br p\u00e1ru \u0161nekov\u00fdch p\u0159evod\u016f: 25:1. V\u00fdstupn\u00ed to\u010div\u00fd moment: 6 200 N\u00b7m. Vle\u010dn\u00fd navij\u00e1k se nach\u00e1zel na zadn\u00ed pracovn\u00ed palub\u011b \u2013 byl p\u0159\u00edmo vystaven l\u00e1man\u00fdm vln\u00e1m, ryb\u00edm vnit\u0159nostem, st\u0159\u00edkaj\u00edc\u00ed mo\u0159sk\u00e9 vod\u011b a kapaj\u00edc\u00edm topn\u00fdm olej\u016fm. T\u0159\u00edda koroze: C5-M s p\u0159ekryt\u00edm z\u00f3ny st\u0159\u00edkaj\u00edc\u00ed vody (p\u0159eru\u0161ovan\u00e9 pono\u0159en\u00ed do mo\u0159sk\u00e9 vody za siln\u00e9ho po\u010das\u00ed). Materi\u00e1l: \u0161nek 316L, kolo NAB. T\u011bsn\u011bn\u00ed: IP67 s tlakov\u00fdm labyrintem (pozitivn\u00ed tlak maziva zabra\u0148uje vniknut\u00ed mo\u0159sk\u00e9 vody b\u011bhem akc\u00ed s vlnami p\u0159es palubu). Cena za p\u00e1r: 2 800 USD (pr\u00e9miov\u00e9 kryt\u00ed proti st\u0159\u00edkaj\u00edc\u00ed vod\u011b oproti standardn\u00edmu C5-M). Proch\u00e1zet \u0161nekov\u00fd reduktor n\u00e1mo\u0159n\u00ed t\u0159\u00eddy<\/a> mo\u017enosti pro aplikace s navij\u00e1ky, rump\u00e1ly a palubn\u00edmi stroji.<\/p>\n

P\u0159\u00edpad 3 \u2013 Vietnamsk\u00fd trajekt pro vnitrozemskou vodn\u00ed dopravu: kotv\u00edc\u00ed navij\u00e1k, C4, n\u00e1kladov\u011b optimalizovan\u00fd<\/h3>\n

Vietnamsk\u00fd provozovatel trajektu specifikoval p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f pro 4 kotevn\u00ed navij\u00e1ky na \u0159\u00ed\u010dn\u00edm trajektu pro 200 cestuj\u00edc\u00edch, kter\u00fd provozuje vnitrozemskou vodn\u00ed s\u00ed\u0165 delty Mekongu. Tah kotevn\u00edho lana: 3 tuny (trajekt kotvil v klidn\u00e9m \u0159\u00ed\u010dn\u00edm proudu bez kol\u00eds\u00e1n\u00ed p\u0159\u00edlivu a odlivu). Motor: elektrick\u00fd o v\u00fdkonu 5,5 kW. P\u0159evodov\u00fd pom\u011br p\u00e1ru \u0161nekov\u00fdch p\u0159evod\u016f: 30:1. V\u00fdstupn\u00ed to\u010div\u00fd moment: 1 800 N\u00b7m. Vnitrozemsk\u00e9 sladkovodn\u00ed prost\u0159ed\u00ed bylo C4 (vysok\u00e9, ale ne mo\u0159sk\u00e9 \u2013 \u017e\u00e1dn\u00e1 soln\u00e1 mlha, m\u00edrn\u00e1 vlhkost). Materi\u00e1l: \u017e\u00e1rov\u011b pozinkovan\u00fd \u0161nek (vhodn\u00fd pro sladkovodn\u00ed C4), kolo z fosforov\u00e9ho bronzu (bez rizika odzinkov\u00e1n\u00ed ve sladk\u00e9 vod\u011b). Povrchov\u00e1 \u00faprava: dvouvrstv\u00e1 epoxidov\u00e1 polyuretanov\u00e1 vrstva s tlou\u0161\u0165kou such\u00e9ho filmu 200 \u00b5m. T\u011bsn\u011bn\u00ed: dvojit\u00fd b\u0159it EPDM, IP55. Cena za p\u00e1r: 420 USD. Celkem za 4 navij\u00e1ky: 1 680 USD. Specifikace C4 u\u0161et\u0159ila p\u0159ibli\u017en\u011b 1 400 USD na p\u00e1r ve srovn\u00e1n\u00ed se specifikac\u00ed pro oce\u00e1nskou plavbu C5-M \u2013 co\u017e je opodstatn\u011bn\u00e9, proto\u017ee trajekt nikdy nevstoupil do slan\u00e9 vody. Patn\u00e1ctilet\u00e1 konstruk\u010dn\u00ed \u017eivotnost trajektu nevy\u017eadovala v lehk\u00e9m a ne\u0161kodn\u00e9m sladkovodn\u00edm prost\u0159ed\u00ed \u017e\u00e1dnou v\u00fdm\u011bnu kol v polovin\u011b \u017eivotnosti.<\/p>\n

<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
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\nOt\u00e1zka: Pot\u0159ebuje p\u00e1r \u0161nekov\u00fdch p\u0159evod\u016f pro n\u00e1mo\u0159n\u00ed kotevn\u00ed navij\u00e1k schv\u00e1len\u00ed klasifika\u010dn\u00ed spole\u010dnost\u00ed?<\/summary>\n

Pro komer\u010dn\u00ed plavidla podl\u00e9haj\u00edc\u00ed \u00famluv\u011b SOLAS a klasifika\u010dn\u00edm pravidl\u016fm (v\u0161echny n\u00e1kladn\u00ed lod\u011b, osobn\u00ed lod\u011b a plavidla pro pob\u0159e\u017en\u00ed dopravu): ano \u2013 p\u00e1r \u0161nekov\u00fdch p\u0159evod\u016f mus\u00ed b\u00fdt typov\u011b schv\u00e1len nebo individu\u00e1ln\u011b certifikov\u00e1n p\u0159\u00edslu\u0161nou klasifika\u010dn\u00ed spole\u010dnost\u00ed. Schv\u00e1len\u00ed zahrnuje certifikaci materi\u00e1lu, ov\u011b\u0159en\u00ed konstrukce (anal\u00fdza nap\u011bt\u00ed), kvalitu v\u00fdroby (sva\u0159ov\u00e1n\u00ed, obr\u00e1b\u011bn\u00ed, tepeln\u00e9 zpracov\u00e1n\u00ed) a z\u00e1t\u011b\u017eov\u00e9 zkou\u0161ky (1,5n\u00e1sobek jmenovit\u00e9 kapacity). U mal\u00fdch plavidel pod klasifika\u010dn\u00edm dohledem (ryb\u00e1\u0159sk\u00e9 lod\u011b pod 24 metr\u016f, rekrea\u010dn\u00ed plavidla) nen\u00ed schv\u00e1len\u00ed t\u0159\u00eddy ze z\u00e1kona vy\u017eadov\u00e1no, ale doporu\u010duje se z d\u016fvod\u016f poji\u0161t\u011bn\u00ed a bezpe\u010dnosti. N\u00e1klady na dokumentaci pro schv\u00e1len\u00ed t\u0159\u00eddy se zvy\u0161uj\u00ed o 300 a\u017e 800 USD za p\u00e1r \u2013 jsou zahrnuty v cen\u011b pro n\u00e1mo\u0159n\u00ed pou\u017eit\u00ed.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak ovliv\u0148uje koroze zp\u016fsoben\u00e1 tren\u00edm p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f v mo\u0159i?<\/summary>\n

K opot\u0159eben\u00ed doch\u00e1z\u00ed, kdy\u017e povrchy zub\u016f \u0161neku a kola za\u017e\u00edvaj\u00ed mikropohyb (amplituda 0,01 a\u017e 0,1 mm) v d\u016fsledku vibrac\u00ed lodi p\u0159i statick\u00e9m zat\u00ed\u017een\u00ed (kotevn\u00ed nap\u011bt\u00ed). Mikropohyb naru\u0161uje mazac\u00ed film, odhaluje hol\u00fd kov a produkuje oxidick\u00e9 \u00falomky, kter\u00e9 p\u016fsob\u00ed jako abrazivo \u2013 urychluj\u00ed lokalizovan\u00e9 opot\u0159eben\u00ed v kontaktn\u00edm bod\u011b zubu. B\u011bhem m\u011bs\u00edc\u016f kotven\u00ed v kotvi\u0161ti s vibracemi p\u0159en\u00e1\u0161en\u00fdmi motorem m\u016f\u017ee opot\u0159eben\u00ed zp\u016fsobit viditeln\u00e9 d\u016flky v kontaktn\u00ed z\u00f3n\u011b. Prevence: pou\u017e\u00edvejte mazivo s p\u0159\u00edsadou proti opot\u0159eben\u00ed (disulfid molybdeni\u010dit\u00fd nebo grafit); b\u011bhem del\u0161\u00edch st\u00e1n\u00ed v levoboku ot\u00e1\u010dejte bubnem navij\u00e1ku o jednu celou ot\u00e1\u010dku t\u00fddn\u011b; a napl\u00e1nujte si kontrolu p\u00e1ru \u0161nekov\u00fdch kol b\u011bhem ka\u017edoro\u010dn\u00ed prohl\u00eddky t\u0159\u00eddy, abyste odhalili opot\u0159eben\u00ed d\u0159\u00edve, ne\u017e naru\u0161\u00ed samosvornou kontaktn\u00ed geometrii.<\/p>\n<\/details>\n

\nOt\u00e1zka: Lze v n\u00e1mo\u0159n\u00edm kotevn\u00edm navij\u00e1ku pou\u017e\u00edt dvouchod\u00fd \u0161nek?<\/summary>\n

Ne \u2013 p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f kotevn\u00edch navij\u00e1k\u016f mus\u00ed b\u00fdt pro samosvorn\u00e9 s jedn\u00edm chodem. Dvouchod\u00fd p\u00e1r by se pod nap\u011bt\u00edm p\u0159i kotven\u00ed vracel zp\u011bt, co\u017e by umo\u017enilo nekontrolovateln\u00e9mu uvol\u0148ov\u00e1n\u00ed kotevn\u00edho lana \u2013 co\u017e p\u0159edstavuje kritick\u00e9 bezpe\u010dnostn\u00ed riziko. N\u00e1kladn\u00ed navij\u00e1ky (kter\u00e9 pou\u017e\u00edvaj\u00ed samostatnou brzdu pro udr\u017een\u00ed b\u0159emene, sp\u00ed\u0161e ne\u017e aby se spol\u00e9haly na samosvorn\u00e9 p\u0159evody) mohou pro vy\u0161\u0161\u00ed \u00fa\u010dinnost p\u0159i tah\u00e1n\u00ed pou\u017e\u00edvat dvouchod\u00e9 p\u00e1ry. Kotevn\u00ed navij\u00e1ky pou\u017e\u00edvaj\u00ed jednochod\u00fd chod ze stejn\u00e9ho d\u016fvodu jako kotevn\u00ed navij\u00e1ky \u2013 kotva se nesm\u00ed uvolnit, kdy\u017e se motor zastav\u00ed. Po\u017eadavek na samosvorn\u00e9 p\u0159evody je absolutn\u00ed a nepodm\u00edn\u011bn\u00fd pro v\u0161echny aplikace lodn\u00edch navij\u00e1k\u016f s dr\u017een\u00edm lana.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00e1 je o\u010dek\u00e1van\u00e1 \u017eivotnost \u0161nekov\u00e9ho p\u0159evodu pro lodn\u00ed navij\u00e1k?<\/summary>\n

Navr\u017eeno pro \u017eivotnost plavidla: 20 a\u017e 25 let s jednou v\u00fdm\u011bnou kola v polovin\u011b \u017eivotnosti ve 12. a\u017e 15. roce (co\u017e se shoduje s druh\u00fdm speci\u00e1ln\u00edm pr\u016fzkumem v such\u00e9m doku). Ocelov\u00fd \u0161nek (316L nebo duplex) vydr\u017e\u00ed po celou dobu \u017eivotnosti plavidla, pokud je povlak udr\u017eov\u00e1n. Kolo z NAB nebo hlin\u00edkov\u00e9ho bronzu je opot\u0159ebiteln\u00fdm prvkem \u2013 provozn\u00ed hodiny jsou obvykle 200 a\u017e 500 ro\u010dn\u011b (pouze kotv\u00edc\u00ed operace), tak\u017ee mechanick\u00e9 opot\u0159eben\u00ed je n\u00edzk\u00e9. Omezuj\u00edc\u00edm faktorem \u017eivotnosti je koroze \u2013 bu\u010f vn\u011bj\u0161\u00ed (selh\u00e1n\u00ed povlaku odhaluj\u00edc\u00ed pouzdro), nebo vnit\u0159n\u00ed (selh\u00e1n\u00ed t\u011bsn\u011bn\u00ed vpou\u0161t\u011bj\u00edc\u00ed solnou mlhu do oleje). Se specifikac\u00ed C5-M a ka\u017edoro\u010dn\u00ed \u00fadr\u017ebou povlaku je c\u00edl 25 let dosa\u017eiteln\u00fd.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00e9 mazivo se pou\u017e\u00edv\u00e1 v p\u00e1rech \u0161nekov\u00fdch p\u0159evod\u016f pro lodn\u00ed navij\u00e1ky?<\/summary>\n

Standardem je miner\u00e1ln\u00ed EP olej n\u00e1mo\u0159n\u00ed kvality ISO VG 460 nebo 680 s inhibitorem koroze a p\u0159\u00edsadou proti t\u0159en\u00ed. Syntetick\u00fd PAG se pou\u017e\u00edv\u00e1 pro aplikace s extr\u00e9mn\u00edmi teplotami (arktick\u00e9, tropick\u00e9), kde teplotn\u00ed rozsah p\u0159esahuje pracovn\u00ed limit miner\u00e1ln\u00edho oleje. Interval v\u00fdm\u011bny oleje: ro\u010dn\u011b b\u011bhem t\u0159\u00eddn\u00ed prohl\u00eddky nebo kdy\u017e anal\u00fdza oleje uk\u00e1\u017ee obsah vody nad 0,5 procenta (co\u017e nazna\u010duje degradaci t\u011bsn\u011bn\u00ed umo\u017e\u0148uj\u00edc\u00ed vniknut\u00ed soln\u00e9 mlhy) nebo \u010d\u00edslo kyselosti nad 2,0 mgKOH\/g. N\u011bkter\u00e9 men\u0161\u00ed navij\u00e1ky ryb\u00e1\u0159sk\u00fdch plavidel pou\u017e\u00edvaj\u00ed pro jednoduchost m\u00edsto oleje lodn\u00ed mazivo \u2013 co\u017e je p\u0159ijateln\u00e9 pro navij\u00e1ky s tahem do 5 tun, kde je tvorba tepla b\u011bhem ta\u017een\u00ed dostate\u010dn\u011b n\u00edzk\u00e1 na to, aby mazivo zvl\u00e1dlo.<\/p>\n<\/details>\n<\/div>\n

<\/p>\n

\u0160nekov\u00e9 p\u0159evody pro lodn\u00ed navij\u00e1ky pracuj\u00ed za nejagresivn\u011bj\u0161\u00edch atmosf\u00e9rick\u00fdch korozn\u00edch podm\u00ednek v jak\u00e9koli pr\u016fmyslov\u00e9 aplikaci \u2013 soln\u00e1 mlha ISO 12944 C5-M o koncentraci 50 a\u017e 300 mg\/m\u00b2\/den, trval\u00e1 vlhkost nad 80 procent a vystaven\u00ed UV z\u00e1\u0159en\u00ed na otev\u0159en\u00fdch palub\u00e1ch po dobu 20 a\u017e 25 let. Korozn\u00ed protokol C5-M mapuje toto prost\u0159ed\u00ed na \u0161nekov\u00fd p\u0159evod z nerezov\u00e9 oceli 316L nebo duplexn\u00ed \u0161nekov\u00fd p\u0159evod, kolo NAB, t\u0159\u00edvrstv\u00fd povlak s minim\u00e1ln\u00ed tlou\u0161\u0165kou such\u00e9ho filmu 320 \u00b5m a t\u011bsn\u011bn\u00ed FKM \u2013 \u00farove\u0148 specifikace, kter\u00e1 je 2 a\u017e 5kr\u00e1t dra\u017e\u0161\u00ed ne\u017e vnitrozemsk\u00e1 norma C4, ale je povinn\u00e1 pro ka\u017ed\u00e9 plavidlo provozovan\u00e9 v otev\u0159en\u00fdch pob\u0159e\u017en\u00edch nebo oce\u00e1nsk\u00fdch vod\u00e1ch. Samosvorn\u00e9 mechanismus dr\u017e\u00ed kotevn\u00ed nap\u011bt\u00ed bez pohonu motoru \u2013 bezpe\u010dnostn\u00ed funkce, kde selh\u00e1n\u00ed b\u011bhem bou\u0159e m\u016f\u017ee v\u00e9st k driftu plavidla a po\u0161kozen\u00ed konstrukce. Schv\u00e1len\u00ed klasifika\u010dn\u00ed spole\u010dnost\u00ed zaji\u0161\u0165uje, \u017ee \u0161nekov\u00fd p\u0159evodov\u00fd p\u0159evod spl\u0148uje ov\u011b\u0159en\u00e9 normy pro konstrukci, materi\u00e1l a z\u00e1t\u011b\u017eov\u00e9 zkou\u0161ky, kter\u00e9 vy\u017eaduje n\u00e1mo\u0159n\u00ed bezpe\u010dnost.<\/p>\n

Pro lod\u011bnice, v\u00fdrobce lodn\u00edho vybaven\u00ed a provozovatele plavidel na\u0161e technick\u00e9 odd\u011blen\u00ed klasifikuje korozn\u00ed prost\u0159ed\u00ed a doporu\u010duje \u00farove\u0148 ochrany dle normy ISO 12944. Standardn\u00ed katalog \u0161nekov\u00e9 p\u0159evodovky pro n\u00e1mo\u0159n\u00ed \u00fa\u010dely<\/a> Zakryjte navij\u00e1ky s rozte\u010d\u00ed st\u0159ed\u016f od 80 do 250 mm s materi\u00e1ly C4 a\u017e C5-M a bal\u00ed\u010dky povlak\u016f. Ode\u0161lete Specifikace pohonu lodn\u00edho navij\u00e1ku<\/a> s typem plavidla, tahem kotevn\u00edho lana, provozn\u00edmi vodami a po\u017eadavky klasifika\u010dn\u00ed spole\u010dnosti.<\/p>\n

<\/p>\n

\n

Specifikujete p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f pro lodn\u00ed navij\u00e1ky nebo palubn\u00ed stroje?<\/h3>\n

Za\u0161lete typ plavidla, tah kotevn\u00edho lana nebo hmotnost kotvy, provozn\u00ed vody (vnitrozemsk\u00e9, pob\u0159e\u017en\u00ed, oce\u00e1nsk\u00e9, na mo\u0159i), klasifika\u010dn\u00ed spole\u010dnost a konstruk\u010dn\u00ed \u017eivotnost plavidla. Za\u0159ad\u00edme kategorii koroze a doporu\u010d\u00edme specifikaci materi\u00e1lu, n\u00e1t\u011bru a t\u011bsn\u011bn\u00ed.<\/p>\n

Vy\u017e\u00e1dejte si specifikaci pohonu lodn\u00edho navij\u00e1ku \u2192<\/a><\/p>\n<\/div>\n

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

Korea Ever-Power \u00b7 Application Engineering Guide Worm and Worm Wheel for Marine Winch and Mooring Equipment A 50,000 DWT bulk carrier moored at a tidal port holds its berth against current and wind through 8 mooring lines, each tensioned at 15 to 30 tonnes by a mooring winch. The worm gear pair inside each winch […]<\/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":[],"class_list":["post-1409","post","type-post","status-publish","format-standard","hentry","category-worm-and-worm-wheel"],"_links":{"self":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1409","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=1409"}],"version-history":[{"count":2,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1409\/revisions"}],"predecessor-version":[{"id":1411,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1409\/revisions\/1411"}],"wp:attachment":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/media?parent=1409"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/categories?post=1409"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/tags?post=1409"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}