{"id":13549,"date":"2020-06-01T12:03:35","date_gmt":"2020-06-01T10:03:35","guid":{"rendered":"http:\/\/www.mequipment.ro\/?p=13549"},"modified":"2020-08-02T11:08:36","modified_gmt":"2020-08-02T09:08:36","slug":"6-excavatoare-de-generatie-noua-in-categoria-heavy-duty","status":"publish","type":"post","link":"https:\/\/mequipment.ro\/en\/6-excavatoare-de-generatie-noua-in-categoria-heavy-duty\/","title":{"rendered":"6 excavatoare de genera\u021bie nou\u0103 \u00een categoria heavy-duty"},"content":{"rendered":"

Excavatoarele<\/strong> sunt \u00een linia \u00eent\u00e2i \u00een construc\u021bii \u0219i \u201dmu\u0219c\u0103 o felie mare\u201d din totalul v\u00e2nz\u0103rilor de utilaje de construc\u021bii la nivel mondial. Practic, e greu de imaginat c\u0103 po\u021bi demara un proiect de construc\u021bii f\u0103r\u0103 un astfel de utilaj. De dimensiuni mini, medii sau mari (full-size), cu design zero tail, aproape zero sau conven\u021bional, cu bra\u021be one-piece, din dou\u0103 segmente, normale sau heavy-duty, excavatoarele pe \u0219enile au un impact major \u00een industrie. \u00centregul spectru cuprinde modele de la 1 p\u00e2n\u0103 la 120 t (asta pentru c\u0103 de la aceast\u0103 clas\u0103 \u00een sus intr\u0103m \u00een cu totul alt\u0103 lig\u0103). Cele dinspre coada ierarhiei noastre sunt denumite excavatoare grele<\/strong> \u0219i fac obiectul acestui articol.<\/em> \u2502Marius Iancu<\/strong><\/p>\n

Produc\u0103torii de utilaje de construc\u021bii folosesc diferite nomenclaturi \u0219i modalit\u0103\u021bi de categorisire a propriilor modele, \u00eens\u0103 cu to\u021bii se \u00eencadreaz\u0103 \u00een cele trei clase de baz\u0103: mini, midi \u0219i full-size. Totu\u0219i, exist\u0103 o a patra categorie, dedicat\u0103 excavatoarelor grele (sau heavy-duty) pe \u0219enile, cele din extremitatea superioar\u0103 a spectrului sus-men\u021bionat, cu modele de +75\/80 t. Este o clas\u0103 \u00een care se vinde un num\u0103r limitat de unit\u0103\u021bi. Acestora le-am mai putea ad\u0103uga o a cincea categorie, cea a excavatoarelor pe ro\u021bi, \u00eens\u0103 ele nu fac subiectul acestui material. <\/p>\n

\"\"Excavatoarele mini sau compacte sunt utilaje de mici dimensiuni, extrem de versatile, destinate lucrului \u00een spa\u021bii str\u00e2mte, \u00een construc\u021bii, amenaj\u0103ri \u0219i lucr\u0103ri utilitare etc. Se potrivesc acolo unde un excavator conven\u021bional nu are ce c\u0103uta \u0219i au mase opera\u021bionale \u00eentre 1 \u0219i 6 t (plus\/minus \u00een func\u021bie de produc\u0103tor). Modelele midi, de la 6 t p\u00e2n\u0103 la 10 t (\u00een unele cazuri, chiar p\u00e2n\u0103 la 12-14 t), sunt, \u00een general, excavatoare cu raz\u0103 de rotire zero sau aproape zero. Ma\u0219inile din aceast\u0103 clas\u0103 de dimensiuni ofer\u0103 capacit\u0103\u021bi de s\u0103pare \u0219i ridicare mai apropiate de modelele full-size, dar sunt \u00eenc\u0103 destul de compacte \u0219i ofer\u0103 avantaje de transport \u0219i acces pe \u0219antiere. <\/p>\n

Nu \u00een ultimul r\u00e2nd, excavatoarele full-size reprezint\u0103 \u0219i cea mai r\u0103sp\u00e2ndit\u0103 clas\u0103, \u0219i de\u0219i printre ele exist\u0103 \u0219i modele care, prin caracteristicile lor, se apropie de excavatoarele medii, cele mai multe utilaje din aceast\u0103 categorie au dimensiuni mari. Cam cele mai mari volume v\u00e2ndute din aceast\u0103 clas\u0103 sunt reprezentate de modelele de 19-24 t \u0219i de cele \u00eentre 33 \u0219i 40 t. OK. \u0218i de aici \u00een sus?<\/p>\n

Ei bine, \u00een aceast\u0103 categorie lucrurile se rarefiaz\u0103, precum aerul \u00een straturile superioare ale atmosferei. Pentru unii produc\u0103tori, aceast\u0103 clas\u0103 este \u0219i cea mai mare treapt\u0103 pe care ajung. Al\u021bii \u00eens\u0103, precum Cat, Komatsu, Liebherr sau Hitachi, se calific\u0103 \u00een liga despre care aminteam \u00een deschiderea acestui material, a excavatoarelor miniere grele (dar despre ele, cu alt\u0103 ocazie!).<\/p>\n

Cum spuneam, \u00een categoria grea, produc\u0103torii vin cu mai pu\u021bine modele. De aici \u00eencolo vorbim de proiecte majore de construc\u021bii \u0219i infrastructur\u0103, dar \u0219i aplica\u021bii de carier\u0103. Dar haide\u021bi s\u0103 vedem care ar fi nout\u0103\u021bile din ultimii ani din clasa heavy-duty, pentru c\u0103 sunt c\u00e2teva care mi-au atras aten\u021bia pe la expozi\u021biile interna\u021bionale recente. <\/p>\n

\"\"Cel mai recent dintre ele este noul excavator de 90 t de la Volvo CE<\/strong>, acum cu motor Stage V, lansat la \u00eenceputul acestui an. EC905F <\/a><\/strong>se ridic\u0103 la nivelul a\u0219tept\u0103rilor unui excavator de asemenea dimensiuni. For\u021ba de s\u0103pare superioar\u0103 se remarc\u0103 \u00een special atunci c\u00e2nd lucreaz\u0103 \u00een materiale dure, datorit\u0103 presiunii hidraulice constante. Sistemul hidraulic optimizat cre\u0219te puterea pompei pentru o operare rapid\u0103 \u0219i lin\u0103, \u00een timp ce sistemul electrohidraulic controleaz\u0103 debitul la cerere \u0219i reduce pierderile interne din circuitul hidraulic. \u00cen plus, EC950F vine cu o supap\u0103 prioritar\u0103 pentru rotirea bra\u021bului.<\/p>\n

Echipat cu un motor Volvo D16 de 450 kW, care are un cuplu ridicat la tura\u021bii mici \u0219i respect\u0103 ultimele standarde de emisii, acest utilaj e proiectat pentru productivitate \u0219i eficien\u021b\u0103. Modul ECO ajut\u0103 excavatorul EC950F s\u0103 ob\u021bin\u0103 o eficien\u021b\u0103 ridicat\u0103 a consumului de combustibil. Acesta optimizeaz\u0103 sistemul hidraulic pentru a reduce pierderile de debit \u0219i presiune, \u00een timp ce modul de lucru integrat permite operatorului s\u0103 selecteze cel mai bun mod de operare \u00een func\u021bie de task: I (Idle), F (Fine), G (General), H (Heavy) \u0219i P (Power max).<\/p>\n

\"\"Nu mai devreme de aprilie 2019 am avut oportunitatea de a vedea la M\u00fcnchen (cu ocazia t\u00e2rgului Bauma), 3 excavatoare heavy-duty \u00een premier\u0103 mondial\u0103. Doosan <\/strong>a lansat pe pia\u021b\u0103 cel mai mare model din gama sa de excavatoare (80 t): DX800LC-5B<\/a><\/strong> \u2013 proiectat pentru a r\u0103spunde nevoilor din aplica\u021biile miniere \u0219i de carier\u0103, precum \u0219i \u00een proiecte majore de construc\u021bii \u0219i infrastructur\u0103. Noul motor diesel de 358 kW (480 hp) \u00eempreun\u0103 cu un sistem hidraulic avansat \u0219i inteligent (ecoPower) contribuie la ob\u021binerea unei productivit\u0103\u021bi de v\u00e2rf \u00een aceast\u0103 clas\u0103 de operare.<\/p>\n

DX800LC-5B include o unitate de control electronic (Electronic Control Unit) care serve\u0219te la optimizarea performan\u021belor motorului diesel pentru a ob\u021bine eficien\u021ba maxim\u0103 a consumului de combustibil. Tehnologia ecoPower are la baz\u0103 aceast\u0103 unitate de control, concentr\u00e2ndu-se pe rolul sistemului hidraulic \u0219i demonstr\u00e2nd ambi\u021bia continu\u0103 a pr\u0103duc\u0103torului coreean de a atinge niveluri nea\u0219teptate de eficien\u021b\u0103 a consumului. Sistemul ecoPower utilizeaz\u0103 senzori pentru a detecta cantitatea de ulei hidraulic necesar\u0103 pentru a \u00eendeplini o sarcin\u0103 anume \u0219i pentru a m\u0103sura cu precizie cantitatea de ulei de care e nevoie, \u00een loc s\u0103 for\u021beze continuu o cantitate fix\u0103 de ulei prin sistem, \u00eembun\u0103t\u0103\u021bind astfel eficien\u021ba. Sistemul hidraulic \u0219i puterea motorului sunt complet optimizate \u0219i sincronizate, reduc\u00e2nd pierderile din sistem.<\/p>\n

\"\"Dup\u0103 numeroasele lans\u0103ri europene din ultimii ani, Kobelco <\/strong>a prezentat pie\u021bei \u0219i cel mai mare excavator al s\u0103u din seria Generation 10 (80-86 t): SK850LC-10E<\/a><\/strong>. Cu o experien\u021b\u0103 de peste 80 de ani \u00een proiectarea \u0219i fabricarea de utilaje, excavatoarele japonezilor de la Kobelco sunt deosebit de apreciate pentru tehnologia avansat\u0103, iar SK850LC-10E nu face excep\u021bie.Propulsat de un motor puternic Hino, noul utilaj are o putere \u0219i o performan\u021b\u0103 ridicate gra\u021bie unei specifica\u021bii \u00eembun\u0103t\u0103\u021bite (un cuplu de 2120 Nm \u0219i o putere de 380 kW). SK850LC-10E vine, de asemenea, cu cel mai recent sistem de r\u0103cire Kobelco \u2013 un sistem de r\u0103cire a motorului cu ventilator dublu ac\u021bionat hidraulic, ce previne supra-r\u0103cirea prin utilizarea senzorilor integra\u021bi.<\/p>\n

Modelul obi\u0219nuit SK850LC-10E, cu bra\u021b standard \u0219i patru versiuni de balansier, se potrive\u0219te perfect pentru lucr\u0103rile generale de construc\u021bii \u0219i excavare. Totu\u0219i, dezvoltarea \u0219i testarea extinse au fost efectuate \u00een condi\u021bii de carier\u0103 \u00een China, India \u0219i \u00een alte \u021b\u0103ri din Asia de Sud-Est, demonstr\u00e2nd calit\u0103\u021bile \u0219i durabilitatea ma\u0219inii. O versiune \u201eME\u201d a lui SK850LC-10E, cu bra\u021b scurt \u0219i balansier scurt, este disponibil\u0103 specific pentru cariere.<\/p>\n

\"\"Tot o noutate este \u0219i modelul HX900-L<\/strong> de la Hyundai<\/strong>, special conceput pentru cerin\u021bele europene din industria de construc\u021bii \u0219i cariere, care va \u00eenlocui modelul R800LC-9. Acest utilaj de 90 t a fost dezvoltat utiliz\u00e2nd tehnologia de v\u00e2rf, pentru a oferi o productivitate excep\u021bional\u0103. HX900 L este al doilea cel mai mare excavator din gama Hyundai, dup\u0103 impun\u0103torul R1200-9 de 120 t. <\/p>\n

Cu un motor Scania DC16 Tier 4 Final, produc\u0103torul coreean spune c\u0103 fa\u021b\u0103 de Seria 9, excavatorul ofer\u0103 acum o reducere cu 90% a emisiilor \u0219i o reducere de 9% a consumului de combustibil \u00een timpul opera\u021biunilor de \u00eenc\u0103rcare. Adoptarea tehnologiei VPC (controlul variabil al puterii) \/ IPC (controlul inteligent al puterii) face posibil controlul optimi al puterii de ie\u0219ire \u0219i debitului pompei, \u00eembun\u0103t\u0103\u021bind performan\u021ba de operare \u0219i economia de combustibil. Supuse unor teste riguroase, bra\u021bul \u0219i balansierul au o rigiditate ridicat\u0103, asigur\u00e2nd stabilitate opera\u021bional\u0103 chiar \u0219i \u00een lucr\u0103rile cu sarcini mari. Cu o rigiditate torsional\u0103 consolidat\u0103 a bazei bra\u021bului \u0219i prin ad\u0103ugarea unor elemente rezistente la uzur\u0103, durabilitatea a fost crescut\u0103 mai mult.<\/p>\n

\"\"La standul Caterpillar<\/strong> de la Bauma mi-a atras aten\u021bia impun\u0103torul excavator Cat 390F L<\/strong>, cu o mas\u0103 opera\u021bional\u0103 de 88-92 t (\u00een func\u021bie de configura\u021bie). Av\u00e2nd criterii pentru care utilajele Cat sunt unanim recunoscute (consum redus, costuri minime de operare, confort optim pentru operator, productivitate de top, mentenan\u021b\u0103 u\u0219oar\u0103), excavatorul hidraulic prezint\u0103 dou\u0103 moduri de putere \u2013 standard \u0219i economy \u2013, precum \u0219i un sistem de putere la cerere (on-demand), ce ajusteaz\u0103 tura\u021bia motorului pentru a se potrivi cu sarcina de operare. <\/p>\n

Nou\u0103 pe modelele din seria F este valva sistemului de control adaptativ Cat (ACS), care gestioneaz\u0103 electronic debitele \u0219i restric\u021biile pentru a se potrivi exact cu r\u0103spunsul hidraulic la mi\u0219carea joystick-ului. Aceasta se deschide \u00eencet atunci c\u00e2nd raza de ac\u0163iune a joystick-ului este redus\u0103 \u015fi se deschide rapid c\u00e2nd mi\u015fcarea este ampl\u0103. Ea va elibera debitul exact acolo unde e nevoie \u015fi c\u00e2nd e nevoie, pentru o manevrare mai lin\u0103, mai mult\u0103 eficien\u0163\u0103 \u015fi un consum de combustibil mai redus.<\/p>\n

Excavatorul este disponibil cu o serie de bra\u021be \u0219i balansiere. Bra\u021bele heavy-duty \u0219i pentru aplica\u021bii generale sunt proiectate pentru excavare \u0219i \u00eenc\u0103rcare, iar bra\u021bul mass-excavation ofer\u0103 o productivitate ridicat\u0103 \u00een aplica\u021bii terasiere la scar\u0103 mare \u0219i la excavarea \u00een materiale grele. O gam\u0103 larg\u0103 de balansiere face pereche perfect\u0103 cu aceste bra\u021be, \u00eendeplinind cerin\u021bele de ad\u00e2ncime de s\u0103pare, raz\u0103 de ac\u021biune \u0219i for\u021be de rupere. Inutil s\u0103 mai amintim disponibilitatea tehnologiilor \u0219i sistemelor Cat Link, Cat Grade etc. ce cresc productivitatea, reduc costurile de proprietate \u0219i u\u0219ureaz\u0103 munca operatorilor.<\/p>\n

\"\"Ultimul excavator asupra c\u0103ruia ma opresc este tot \u00een curtea unui produc\u0103tor american: CASE CE<\/strong>. Adus s\u0103 \u00eenlocuiasc\u0103 modelele CX700B \u0219i CX800B, modelul CX750D <\/a><\/strong>este cel mai mare \u0219i mai puternic excavator Case \u0219i a fost lansat \u00een 2017, la t\u00e2rgul SteinExpo. Cu o putere de operare de 512 hp, CX750D este disponibil \u00een dou\u0103 configura\u021bii: standard, cu o for\u021b\u0103 de s\u0103pare de 335 kN (cu Power Boost), \u0219i pentru excavare \u00een mas\u0103 (mass-excavation), cu o for\u021b\u0103 de s\u0103pare de 366 kN (cu Power Boost), \u0219i este echipat cu bra\u021b \u0219i balansier mai scurte, care permit for\u021be mai mari de rupere \u0219i posibilitatea utiliz\u0103rii de cupe mai mari, pentru o capacitate suplimentar\u0103.<\/p>\n

Sistemul hidraulic inteligent CASE (Intelligent Hydraulic System) \u0219i cele patru sisteme de control integrate ob\u021bin din partea utilajului maximum de putere hidraulic\u0103 \u0219i impuls, rezult\u00e2nd o for\u021b\u0103 sporit\u0103 \u0219i un consum eficient de combustibil. Excavatorul poate fi folosit \u00eentr-unul dintre cele trei moduri de operare \u2013 Automatic, Heavy si Speed Priority \u2013, asigur\u00e2nd utilizarea optim\u0103 \u0219i eficient\u0103 a puterii hidraulice \u0219i a motorului.<\/p>\n","protected":false},"excerpt":{"rendered":"

Excavatoarele sunt \u00een linia \u00eent\u00e2i \u00een construc\u021bii \u0219i \u201dmu\u0219c\u0103 o felie mare\u201d din totalul v\u00e2nz\u0103rilor de utilaje de construc\u021bii la nivel mondial. Practic, e greu de imaginat c\u0103 po\u021bi demara<\/p>\n","protected":false},"author":1,"featured_media":13550,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[32,42],"tags":[235,6039,7913,443,194,7756,164,4985,7911,77,7912,68,7914,79,7354],"class_list":["post-13549","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-utilaje-de-constructii","category-utilaje-terasiere","tag-case-ce","tag-case-cx750d","tag-cat-390f-l","tag-caterpillar","tag-doosan","tag-doosan-dx800lc-5b","tag-excavatoare","tag-excavatoare-grele","tag-excavator-heavy-duty","tag-hyundai","tag-hyundai-hx-900-l","tag-kobelco","tag-kobelco-sk-850lc","tag-volvo-ce","tag-volvo-ec950f"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["ro","en"],"languages":{"ro":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":false,"excerpt":false}}},"yoast_head":"\n6 excavatoare de genera\u021bie nou\u0103 \u00een categoria heavy-duty - M. 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