Variable-pitch propeller or repeller
View Patent ↗In the case of a variable-pitch propeller or repeller according to the invention, the pitch-adjusting device is arranged in the hub and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device comprises an electrical drive device, for moving the blades from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device, for locking the blades in the numerically limited number of different blade pitches.
1. A variable-pitch propeller or repeller, comprising:
a hub, propeller or repeller blades of variable pitch being fastened to the hub; and
a pitch adjusting facility configured to change the pitch of the propeller or repeller blades, the pitch adjusting facility being disposed in the hub and being configured so as to only allow a numerically limited number of different blade pitches, and the pitch adjusting facility including
an electric drive facility configured to move the blades from a first to a second of the numerically limited number of blade pitches, and
an electrically actuatable locking facility configured to lock the blades in the numerically limited number of different blade pitches, wherein the electric drive facility includes
a first electric ring motor including an annular stator and an annular rotor, including the same axis as the rotation axis of the variable-pitch propeller or repeller, and
a drive mechanism configured to convert a rotational movement of the rotor to a rotational movement of the blades about their longitudinal axis and, wherein the drive mechanism comprises a yoke, movable in the direction of the rotation axis.
2. A variable-pitch propeller or repeller, comprising: a hub, propeller or repeller blades of variable pitch being fastened to the hub; and
a pitch adjusting facility configured to change the pitch of the propeller or repeller blades, the pitch adjusting facility being disposed in the hub and being configured so as to only allow a numerically limited number of different blade pitches, and the pitch adjust facility including
an electric drive facility configured to move the blades from a first to a second of the numerically limited number of blade pitches, and an electrically actuable locking facility configured to lock the blades in the numerically limited number of different blade pitches, wherein the electric drive facility includes
a first electric ring motor including an annular stator and an annular rotor, including the same axis as the rotation axis of the variable-pitch propeller or repeller, and
a drive mechanism configured to convert a rotational movement of the rotor to a rotational movement of the blades about their longitudinal axis and, wherein the drive mechanism comprises a yoke, rotatable about the rotation axis.
3. The variable-pitch propeller or repeller of claim 1 , wherein the locking facility comprises bolts that are movable in the direction of the rotation axis and wherein the rotor of the first ring motor includes openings to accommodate the bolts.
4. The variable-pitch propeller or repeller of claim 3 , wherein, for electrical actuation, the locking facility comprises a second electric ring motor including an annular stator and an annular rotor, including the same axis as the rotation axis of the variable-pitch propeller or repeller, and a drive mechanism configured to convert a rotational movement of the rotor to a movement of the bolts in the direction of the rotation axis.
5. The variable-pitch propeller or repeller of claim 1 , wherein the electric drive facility includes at least one electric linear motor including a rotor and a stator, and a drive mechanism configured to convert a linear movement of the rotor to a rotational movement of the blades about their longitudinal axis.
6. The variable-pitch propeller or repeller of claim 5 , wherein the locking facility includes a disk, rotatable in the peripheral direction of the rotation axis, to fix the drive mechanism or linear motor in respect of a movement in the direction of the rotation axis.
7. The variable-pitch propeller or repeller of claim 1 , further comprising an energy transfer facility for the inductive transfer of electrical energy from outside the variable-pitch propeller or repeller to the pitch adjusting facility.
8. The variable-pitch propeller or repeller of claim 1 , wherein the pitch adjusting facility is configured so that, when the blades are moved by the electric drive facility, the locking facility is deactivated and when the blade pitch is locked by the locking facility, the electric drive facility is deactivated.
9. A nacelle drive for driving a floating facility, comprising:
an underwater housing including a propeller shaft supported rotatably therein; and
the variable-pitch propeller of claim 1 , disposed on one end of the propeller shaft.
10. The nacelle drive of claim 9 , further comprising an electric motor, disposed in the housing, configured to drive the propeller shaft.
11. The nacelle drive of claim 10 , wherein the electric motor is configured as a permanent-magnet motor.
12. The nacelle drive of claim 9 , further comprising a further variable-pitch propeller, disposed on the other end of the propeller shaft.
13. A wind energy system comprising:
a nacelle housing including a repeller shaft supported rotatably therein; and
the variable-pitch repeller of claim 1 , disposed on one end of the repeller shaft.
14. The variable-pitch propeller or repeller of claim 1 , wherein the pitch adjusting facility is configured so as to only allow only two blade pitches.
15. The variable-pitch propeller or repeller of claim 1 , wherein the locking facility comprises bolts that are movable in the direction of the rotation axis and wherein the rotor of the first ring motor includes openings to accommodate the bolts.
16. A variable-pitch propeller or repeller, comprising:
a hub, propeller or repeller blades of variable pitch being fastened to the hub; and
a pitch adjusting facility configured to change the pitch of the propeller or repeller blades, the pitch adjusting facility including
an electric drive facility configured to move the blades from a first to a second of blade pitches, and
an electrically actuatable locking facility configured to lock the blades in different blade pitches, wherein the electric drive facility includes
a first electric ring motor including an annular stator and an annular rotor, including the same axis as the rotation axis of the variable-pitch propeller or repeller, and
a drive mechanism configured to convert a rotational movement of the rotor to a rotational movement of the blades about their longitudinal axis, wherein
the locking facility includes bolts that are movable in the direction of the rotation axis and the rotor of the first ring motor includes openings to accommodate the bolts.