Arrangement and method for turning a propulsion unit
First Claim
1. A propeller drive arrangement for moving and steering a vessel traveling in water, which arrangement comprises an azimuthing propulsion unit, which comprises a pod positionable outside said vessel, a first electric motor positioned inside said pod, for rotating a propeller connected to said pod, and a shaft means connected to said pod for supporting said pod in a rotatable manner from a hull of said vessel,operating means for turning said azimuthing propulsion unit in relation to said hull of said vessel for steering said vessel in accordance with a steering command originating from the vessel'"'"'s steering control device, characterized in that said operating means comprises a second electric motor for turning said azimuthing propulsion unit via mechanical power transmission equipment connected to said electric motor, the arrangement further comprising a power supply unit for supplying electric power to said second electric motor a control unit for controlling the operation of said second electric motor by controlling said power supply unit a sensor means functionally connected to said control unit for detecting the rotational position of said azimuthing propulsion unit, wherein the sensor means detects the rotational positional position of the azimuthing pod in relation to the hull of the vehicle, said control unit being arranged for processing both a steering command information originating from said steering control device and rotational position information originating from said sensor means and to control the operation of the second electric motor on the basis of said processing.
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Accused Products
Abstract
The present invention relates to a propeller drive arrangement and a method for moving and steering a vessel. The arrangement comprises an azimuthing propulsion unit and operating equipment for turning said azimuthing propulsion unit to steer the vessel. The operating equipment comprises an electric motor for rotating said propulsion unit by means of a mechanical power transmission machinery connected to said electric motor. A power unit supplies electric power to said electric motor. A control unit controls the operation of said electric motor by controlling said power unit. The arrangement also comprises a sensor device for detecting the rotational position of said azimuthing propulsion unit. A control unit is arranged to process steering command information from a control means and turning position information from said sensor device and to control the operation of said electric motor on the basis of this processing.
37 Citations
16 Claims
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1. A propeller drive arrangement for moving and steering a vessel traveling in water, which arrangement comprises an azimuthing propulsion unit, which comprises a pod positionable outside said vessel, a first electric motor positioned inside said pod, for rotating a propeller connected to said pod, and a shaft means connected to said pod for supporting said pod in a rotatable manner from a hull of said vessel,
operating means for turning said azimuthing propulsion unit in relation to said hull of said vessel for steering said vessel in accordance with a steering command originating from the vessel'"'"'s steering control device, characterized in that said operating means comprises a second electric motor for turning said azimuthing propulsion unit via mechanical power transmission equipment connected to said electric motor, the arrangement further comprising a power supply unit for supplying electric power to said second electric motor a control unit for controlling the operation of said second electric motor by controlling said power supply unit a sensor means functionally connected to said control unit for detecting the rotational position of said azimuthing propulsion unit, wherein the sensor means detects the rotational positional position of the azimuthing pod in relation to the hull of the vehicle, said control unit being arranged for processing both a steering command information originating from said steering control device and rotational position information originating from said sensor means and to control the operation of the second electric motor on the basis of said processing.
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8. A method for moving and steering a vessel traveling in water, in which method
said vessel is moved using an azimuthing propulsion unit comprising a pod positionable outside said vessel, and a first electric motor positioned within said pod for rotating a propeller arranged at said pod, and a shaft unit connected to said pod for supporting, in a rotatable manner, said pod from a hull of said vessel said azimuthing propulsion unit is turned in relation to said hull of said vessel for steering the vessel in accordance with a steering command given by the vessel'"'"'s steering control device, characterized in detecting the rotational position of the azimuthing propulsion unit in relation to the hull of the vessel by means of a sensor means connected functionally to a control unit, wherein the sensor means detects the rotational positional position of the azimuthing pod in relation to the hull of the vehicle, processing in said control unit, steering command information from said control device and rotational position information from said sensor means, turning said azimuthing propulsion unit by means of a mechanical power transmission machinery connected to a second electric motor on the basis of said processing performed in said control unit, and supplying electric power to said second electric motor in response to said processing performed by said control unit.
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16. A propeller drive arrangement for moving and steering a vessel traveling in water, which arrangement comprises:
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an azimuthing propulsion unit, which comprises a pod positionable outside said vessel, a first electric motor positioned inside said pod for rotating a propeller connected to said pod, and a shaft connected to said pod for supporting said pod in a rotatable manner from a hull of said vessel;
an operating unit for turning said azimuthing propulsion unit in relation to said hull of said vessel for steering said vessel in accordance with a steering command originating from the vessel'"'"'s steering control device, characterized in that said operating unit comprises a second electric motor for turning said azimuthing propulsion unit via mechanical power transmission equipment connected to said electric motor;
a power supply unit for supplying electric power to said second electric motor;
a control unit for controlling the operation of said second electric motor by controlling said power supply unit;
a sensor unit functionally connected to said control unit for detecting the rotational position of said azimuthing propulsion unit, wherein the sensor unit detects the rotational positional position of the azimuthing pod in relation to the hull of the vehicle;
said control unit being arranged for both to process a steering command originating from said steering control device and rotational position information originating from said sensor unit, and to control the operation of the second electric motor on the basis of said processing.
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Specification