Device for the roll stabilizing of a watercraft

Abstract

The invention relates to a device for the roll-stabilization of a watercraft in motion, at anchor, or at zero speed, and / or for influencing the course of the watercraft, including a fin-carrying shaft on which a guide fin is disposed, wherein for changing an actual angle of attack of the guide fin in the water, the fin-carrying shaft is drivable by an electromechanical drive unit, and the drive unit is disposed on the hull using a base. According to the invention it is provided that the electromechanical drive unit is configured with a synchronous motor that drives the fin-carrying shaft using a reducing eccentric transmission. The device thereby has a significantly reduced installation space requirement, causes only slight operating noises, and is also optimally electronically regulable.

Description

shaped cross-sectional profile 232 including an inflow edge 234 and an outflow edge 236 for the surrounding water 220.

[0041] The fin stabilizer 102 described here merely by way of example for an inventive 15 device for roll-stabilizing of a ship requires a reduced installation space requirement, causes only minimal operating noises, and has an optimal regulability for optimal damping of undesirable rolling movements about the longitudinal axis of the ship 206.

[0042] The invention relates to a device (100) for the roll-stabilizing of a watercraft (208) in 20 motion, at anchor, or at zero speed, and / or for influencing the course of the watercraft (208), including a fin-carrying shaft (110) on which a guide fin (112) is disposed, wherein for changing an actual angle of attack (a) of the guide fin (112) in the water (220), the fin-carrying shaft (110) is drivable by an electromechanical drive unit (120), and the drive unit (120) is disposed on the hull (204) using a base (200). According to the invention it is 25 provided that the electromechanical drive unit (120) is configured with a synchronous motor (126) that drives the fin-carrying shaft (110) using a reducing eccentric transmission (130). The device (100) thereby has a significantly reduced installation space requirement, causes only slight operating noises, and is also optimally electronically regulable. 30

[0043] Unless the context requires otherwise, where the terms “comprise”, “comprises”, “comprised” or “comprising” are used in this specification (including the claims) they are to be interpreted as specifying the presence of the stated features, integers, steps or components, but not precluding the presence of one or more other features, integers, steps or components, or group thereof. REFERENCE NUMBER LIST 2021307073   10 Jun 2026 100   Device 102   Fin stabilizer 5    110   Fin-carrying shaft 112   Guide fin 120   Drive unit (Angle of attack) 126   Synchronous motor 130   Eccentric transmission 10   132   Toothed wheel 134   Toothed wheel 136   Rotor shaft (synchronous motor) 138   Coupling 140   Input shaft 15   142   Output shaft 146   Locking device 150   Hollow shaft 160   Power electronics 162   Electrical system 20   166   Control and / or regulating device 170   Position sensor 172   Roll sensor 176   Motor sensor 178   Rotor position sensor 25   180   Rotational speed sensor 186   Rotational angle sensor 192   Action 200   Base 202   Hull skin 30   204   Hull 206   Ship 208   Watercraft 210   Longitudinal central axis (fin-carrying shaft) 216   Longitudinal axis (hull) 2021307073   10 Jun 2026 220   Water 222   Water surface 224   Coordinate system 5   230   Indicator element 232   Cross-sectional profile 234   Inflow edge 236   Outflow edge 10   g      Gravitational force (gravity) a      Actual angle of attack (stabilizing fin) P      Target angle of attack (stabilizing fin) Y      Installation angle 15 Rotor position angle Number of rotations

Claims

2021307073   10 Jun 2026THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS1. Device for roll-stabilizing of a watercraft in motion, at anchor, or at zero speed, and / or for influencing the course of the watercraft, including a fin-carrying shaft on which a guide fin is5 disposed, wherein for changing an actual angle of attack of the guide fin in the water, the fin-carrying shaft is drivable using an electromechanical drive unit, and the drive unit may be disposed on the hull using a base, wherein the electromechanical drive unit is configured with a synchronous motor that drives the fin-carrying shaft using a reducing eccentric transmission, wherein a rotor shaft of the synchronous motor is configured at least sectionally10 as a hollow shaft into which a coupling is integrated and adapted to connect the rotor shaft to an input shaft of the eccentric transmission, such that the rotor shaft and the input shaft rotate together.

2. Device according to patent claim 1, wherein the eccentric transmission includes two15 toothed wheels disposed circumferentially offset with respect to each other.

3. Device according to patent claim 2, wherein the two toothed wheels are circumferentially offset with respect to each other by 180°.20   4. Device according to any one of patent claims 1, 2 or 3, wherein the rotor shaft of thesynchronous motor is associated with a locking device.

5. Device according to any one of patent claims 1 to 4, wherein the synchronous motor is controlled by power electronics that are controlled by a control and / or regulating device.

256. Device according to patent claim 5, wherein the synchronous motor includes at least one motor sensor that comprises a rotor-position sensor for determining a rotor-position angle, and a rotational speed sensor for determining a number n of rotations of the rotor shaft.30   7. Device according to patent claim 5 or 6, wherein an actual angle of attack of the fin-carrying shaft is directly capturable using a rotational angle sensor associated therewith, wherein the rotational angle sensor is configured for detecting at least one full rotation of the fin-carrying shaft.2021307073   10 Jun 20268. Device according to any one of patent claims 5, 6 or 7, wherein the rotor-position sensor and / or the rotational angle sensor are each embodied as absolute sensors.

9. Device according to any one of patent claims 5 to 8, wherein a target angle of attack of the 5 guide fin is calculable based on the rotor-position angle using the control and / or regulating device.

10. Device according to any one of patent claims 5 to 9, wherein in the case of a too-large deviation between the calculated target angle of attack and the actual angle of attack10 measured using the rotational angle sensor, an action is triggerable with the aid of the control and / or regulating device.

11. Device according to patent claim 10, wherein the action is a warning signal, a recalibration, or the like.1512. Device according to any one of the preceding patent claims, wherein the rotor shaft of the synchronous motor, an input shaft of the eccentric transmission, an output shaft of the eccentric transmission, and the fin-carrying shaft are essentially aligned with respect to each other.2013. Device according to any one of the preceding patent claims, wherein the device is disposed on the hull of the watercraft such that an influencing of the course of the watercraft is realizable in the manner of a rudder blade.

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