Arrangement in the transfer of electric current to a propulsion device provided with an electric motor in a ship or equivalent

摘要

The invention concerns an arrangement in the transfer of electric current to a propulsion device provided with an electric motor in a ship or equivalent, which propulsion device is mounted on the ship's hull (1) as rotatable in relation to a substantially vertical axis of rotation. At the lower end of the vertical frame (15) of the propulsion device, a lower housing (11) is mounted, in which an electric motor (12) is fitted which drives a propeller (14) which revolves around a substantially horizontal shaft of rotation. The current transfer arrangement comprises a stationary conductor part (2) mounted stationarily in relation to the hull (1) of the ship and a mobile conductor part (3), which is installed on the vertical frame (15) of the propulsion device. The stationary conductor part (2) and the moving conductor part (3) consist of an annular part and of a part of circular section fitted inside the annular part coaxially with said annular part, so that an annular intermediate space (17) remains between the stationary conductor part (2) and the mobile conductor part (3). In the intermediate space, an electrically conductive liquid, amorphous or equivalent medium (4) is fitted in constant contact with the stationary conductor part (2) and the mobile conductor part (3), the electric current being transferred through the electrically conductive medium (4) from the stationary conductor part (2) to the mobile conductor part (3) and from it further to the electric motor (12).