PROPULSION SYSTEM FOR MARITIME CRAFT

摘要

The invention relates to a hybrid propulsion system for maritime craft. The aim of the invention is to provide the capability to adapt the power to suit individual cases and to guarantee a high degree of safety and economic efficiency as a whole. To achieve this, the system is provided with at least two contra-rotating propellers (1, 2) that are located coaxially one behind the other and can be driven simultaneously or alternately, each mounted on an assigned shaft (5, 13). The shaft (13) assigned to the front propeller (2) is configured as a hollow shaft that is penetrated by the shaft (5) assigned to the rear propeller (1). The shaft (5) assigned to the rear propeller (1) can be driven by means of at least one on-board primary motor (3) and the shaft (13) assigned to the front propeller (2) can be driven by means of at least one designated electromotor (10), which can be selectively supplied with electric current by a shaft-driven alternator (18) that is additionally driven by the primary motor (3) and/or by on-board auxiliary power units (20). The total advance power obtained when the auxiliary power units (20) and the primary motor (3) are simultaneously activated exceeds the maximum advance power that can be generated by the primary motor.