Ebe mmepe nke kreenu

Na 10 BC, onye na-ese ụkpụrụ ụlọ Rom oge ochie bụ Vitruvius kọwara igwe na-ebuli elu n'akwụkwọ ntuziaka ya.Igwe a nwere mast, n'elu nke mast ahụ na-eji ihe ndọtị eme ihe, a na-edozi ọnọdụ nke mast site na eriri eriri, na eriri na-agafe na pulley na-adọta site na winch iji bulie ihe ndị dị arọ.

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Na narị afọ nke 15, Ịtali mepụtara crane jib iji dozie nsogbu a.Kreen ahụ nwere cantilever na-achọgharị nke nwere ihe ndọba n'elu ogwe aka, nke enwere ike ibuli ma tụgharịa.

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Na etiti na mbubreyo narị afọ nke 18, mgbe watt kwalitere ma mepụta injin uzuoku, o nyere ọnọdụ ike maka igwe na-ebuli elu.N'afọ 1805, Glen engineer Lenny rụrụ ụgbọ mmiri mbụ nke ụgbọ mmiri maka ọdụ ụgbọ mmiri London.Na 1846, Armstrong nke England gbanwere kreenu uzuoku na Newcastle dock ka ọ bụrụ kreenu hydraulic.

Na mmalite narị afọ nke 20, a na-eji crane ụlọ elu na Europe.
The kreenu tumadi gụnyere usoro ibuli elu, arụ ọrụ usoro, luffing usoro, slewing usoro na metal Ọdịdị.Usoro ebuli bụ isi usoro ọrụ crane, nke na-emekarị nke usoro nkwusioru na winch, yana ibuli ihe dị arọ site na sistemụ hydraulic.

A na-eji usoro arụ ọrụ na-ebugharị ihe dị arọ ogologo ogologo na n'ahịrị ma ọ bụ dozie ọnọdụ ọrụ nke kreenu.Ọ na-abụkarị moto, reducer, brake na wheel.The luffing usoro a kwadebere naanị na jib kreenu.Ngosipụta na-ebelata mgbe jib na-ebuli elu ma na-abawanye mgbe ọ na-agbada.A na-ekewa ya na luffing ziri ezi na luffing na-enweghị isi.A na-eji usoro igbu egbu mee ka ọ gbanwee ọganihu ahụ ma mejupụtara ngwaọrụ ịnya ụgbọ ala na ihe na-egbu egbu.Ihe owuwu ígwè bụ usoro nke kreenu.Akụkụ ndị bụ isi dị ka àkwà mmiri, ọganihu na gantry nwere ike ịbụ igbe igbe, nhazi truss ma ọ bụ ihe owuwu weebụ, na ụfọdụ nwere ike iji nchara akụkụ dị ka ogwe nkwado.

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Oge nzipu: Ọktoba 30-2021