Wind turbine tower attachment
Devices, systems, and methods are directed to mounting an auxiliary component to a tower based at least in part on a force distribution in which a normal force is greater than a shear force exerted by the auxiliary component on a shell of the tower such that the auxiliary component may be held in place relative to the tower without penetrating the shell of the tower. Thus, as compared to mounting techniques requiring penetration of the shell of the tower, this force distribution along the shell of the tower may facilitate mounting the auxiliary component to the tower with little to no impact on cost and/or structural requirements of the tower. Further, or instead, as compared to other mounting techniques, mounting the auxiliary component based at least in part on this force distribution may reduce or eliminate the need for specialized tools, thus facilitating in-field installation of the auxiliary component.
1. A tower comprising:
a tower section including a shell having an inner surface defining a volume; and
an auxiliary component at least partially disposed in the volume, the auxiliary component including a body, a linkage arm, a first coupling attached to the tower section, and a second coupling attached to the inner surface of the shell, the linkage arm having a first end portion and a second end portion, the body rotatably coupled to the tower section at the first coupling, the first end portion of the linkage arm rotatably coupled to the body via a first revolute joint, and the second end portion of the linkage arm rotatably coupled, via a second revolute joint, to the second coupling attached to the inner surface of the shell, wherein a first force exerted by the auxiliary component on the tower section via the first coupling is substantially perpendicular to a normal component of a second force exerted by the linkage arm on the inner surface of the shell via the second coupling, and the linkage arm is rotatable, at the second revolute joint, about a first axis perpendicular to the normal component of the second force, and the normal component of the second force is greater than a shear component of the second force exerted by the linkage arm on the inner surface of the shell via the second coupling.
2. The tower of claim 1 , wherein the first coupling and the second coupling collectively restrict movement of the auxiliary component in three dimensions relative to the inner surface of the shell.
3. The tower of claim 1 , wherein the shell is a tube, the first force exerted by the auxiliary component on the tower section, via the first coupling, is directed substantially parallel to the inner surface of the shell.
4. The tower of claim 3 , wherein the tube is tapered along a center axis defined by the tube.
5. The tower of claim 1 , wherein the tower section further includes a flange coupled to the shell, the flange supports the first force exerted by the auxiliary component on the tower section, and the flange is attachable to one or more additional components to form the tower.
6. The tower of claim 5 , wherein the first coupling is attached to the flange of the tower section.
7. The tower of claim 1 , wherein, with the second coupling attached to the inner surface of the shell, the inner surface of the shell is unpenetrated by the second coupling.
8. The tower of claim 7 , wherein the second coupling includes an adhesive in contact with the inner surface of the shell.
9. The tower of claim 7 , wherein at least one portion of the inner surface of the shell is formed of a ferromagnetic material, and the second coupling includes a magnet in contact with the ferromagnetic material.
10. The tower of claim 1 wherein the first coupling includes a third revolute joint, and the first revolute joint, the second revolute joint, and the third revolute joint are oriented relative to each other such that a respective axis of rotation of each respective revolute joint is parallel to a respective axis of rotation of each of the other revolute joints.
11. The tower of claim 1 , wherein the first coupling, the second coupling, and the linkage arm collectively support the body at a fixed distance away from the inner surface of the shell with the body substantially parallel to the inner surface of the shell.
12. The tower of claim 1 , wherein the body of the auxiliary component is a ladder including a plurality of rungs, and a longitudinal axis defined by each rung of the plurality of rungs extends in a direction perpendicular to each of the first force and the normal component of the second force.
13. The tower of claim 1 , wherein at least one of the first force and the normal component of the second force is a tensile force exerted by the auxiliary component on the shell.
14. The tower of claim 1 , wherein, in response to a dynamic load on the auxiliary component, the second revolute joint maintains a force distribution in which the normal component of the second force is greater than the shear component of the second force exerted by the linkage arm on the inner surface of the shell via the second coupling.