Ship reduction gear for contrarotating screws

摘要

A ship reduction gear having at least one differential, the driving element whereof is coupled with a driving means and each driven element is kinematically associated with the gear of a respective propeller shafting. The kinematic chain associating each driven element with a respective gear comprises pairs of gears permanently meshed with said gear and fitted on ends of their respective shafts whose other ends have fitted thereon gears permanently meshed with a pinion linked with a driven element of the differential, as a result of which the power taken from the driving means is divided into four flows, two flows per gear.