KR-20260063021-A - Rotor sail stable balance system
Abstract
The present invention relates to a rotor sail attitude maintenance system comprising a column fixed to a hull, a shell that surrounds at least a portion of the column and is rotatably connected to the column, and a centering device that causes a restoring force to act in the opposite direction when the shell tilts in a specific direction, wherein the centering device comprises a rail and a pair of wheels that are rotatable on the rail and have a circular truncated shape that increases uniformly from the outer side to the inner side along the radial direction of the column. By applying the centering device to the rotor sail, a restoring force is applied in the opposite direction when the shell tilts in a specific direction, thereby automatically maintaining the center of the shell, which can solve problems such as load concentration on a specific bearing, excessive vibration of the shell, and failure of the shell.
Inventors
- 오환엽
Assignees
- 에이치디한국조선해양 주식회사
- 에이치디현대중공업 주식회사
- 에이치디현대삼호 주식회사
Dates
- Publication Date
- 20260507
- Application Date
- 20241030
Claims (7)
- In a rotor sail attitude maintenance system, A column fixed to the hull; A shell that encloses at least a portion of the column and is rotatably connected to the column; and It includes a safety device that causes a restoring force to act in the opposite direction when the above shell is tilted in a specific direction, and The above-mentioned caution device is, Rail; and A rotor sail attitude maintenance system comprising a pair of wheels rotatable on the rail, having a circular truncated shape that increases uniformly from the outer side to the inner side along the radial direction of the column.
- In claim 1, A rail support member disposed between the column and the shell, fixed to the outer surface of the column to support the rail; A rotor sail attitude maintenance system further comprising a wheel support member disposed between the column and the shell and fixed to the inner surface of the shell to support the upper portion of the pair of wheels.
- In claim 2, The above wheel support is, A first circular part having a shape corresponding to the above rail; A fixing part extending from the first circular part and fixed to the inner surface of the shell; and A rotor sail attitude maintenance system comprising a first connection connected to the center of the above pair of wheels.
- In claim 2, The above rail support is, A second circular part fixed along the outer surface of the column; and A support member connected to the second circular portion; and A rotor sail attitude maintenance system comprising a second connecting part installed on the above-mentioned support member and connected to the above-mentioned rail.
- In claim 1, The above rail is a rotor sail attitude maintenance system fixed to the hull along the outer surface of the shell.
- In claim 1, A rotor sail attitude maintenance system including a hydraulic cylinder capable of adjusting the height of the above rail.
- In claim 6, The above rail is a splittable rotor sail attitude maintenance system.
Description
Rotor sail stable balance system The present invention relates to a rotor sail attitude maintenance system, and more specifically, to a rotor sail attitude maintenance system that uses a centering device comprising a pair of wheels rotatable on a rail, having a circular truncated shape that increases uniformly from the outer side to the inner side along the radial direction of the column, so that a restoring force acts in the opposite direction when the shell tilts in a specific direction. Propellers, which rotate under the power of engines and other components on ships, typically generate thrust using fossil fuels. Recently, with the expansion of areas subject to greenhouse gas emission regulations, there has been an increasing demand for eco-friendly ship designs. To meet these environmental regulatory requirements, we are developing rotor sail vessels that utilize wind power to provide additional propulsion while at sea. A rotor sail refers to a cylindrical structure installed to rotate on a ship's deck; by utilizing the Magnus effect to generate additional thrust, it can reduce fuel consumption. The Magnus effect refers to the generation of a transverse force—a force perpendicular to the axis and the direction of the incoming flow—in a cylinder that rotates around its own axis and receives an incoming flow perpendicular to that axis. The flow around a rotating cylinder can be interpreted as the superposition of the homogeneous flow around the body and vortices. Due to the non-uniform distribution of the overall flow, an asymmetric pressure distribution is created around the cylinder. Therefore, a ship is equipped with a rotor sail that generates a force perpendicular to the effective wind direction within the flow, that is, the wind direction corrected by the maximum speed; this generated force can be used to propel the ship, similar to sailing. A vertically positioned cylinder rotates around its axis, causing air entering from the side to flow, preferably in the direction of rotation around the cylinder, due to surface friction. Consequently, the flow velocity is higher and the static pressure is lower on the front side, and the ship gains a force in the forward direction. A rotor sail typically consists of a column fixed to the hull, a shell that encloses at least a portion of the column and is rotatably connected to it, and a drive unit that rotates the shell. Since the shell structure is tall, structural deformation or vibration may occur; to mitigate this, guide bearings are installed on the underside of the rotor sail. Depending on environmental conditions, the shell rotates while tilted in one direction. In such cases, the dynamic characteristics of the rotor sail become unstable, and if the load is concentrated on a specific guide bearing due to these unstable characteristics, the problem of guide bearing failure occurs. In addition, the excitation force caused by centrifugal force is generated, leading to problems such as excessive vibration of the shell and failure of the shell. FIG. 1 is a drawing illustrating a ship equipped with a rotor sail according to one embodiment of the present invention. FIG. 2 is a drawing illustrating a rotor sail according to a first embodiment of the present invention. FIG. 3 is an enlarged view of section A of a rotor sail equipped with a centering device according to the first embodiment of the present invention. FIG. 4 is an enlarged view of section A of a rotor sail equipped with a centering device according to the first embodiment of the present invention. FIG. 5 is a plan view of the AA' cross-section of a rotor sail equipped with a centering device according to the first embodiment of the present invention. FIG. 6 is a detailed view of a centering device according to a first embodiment of the present invention. FIG. 7 is a diagram illustrating the generation of restoring force according to the first embodiment of the present invention. FIG. 8 is a drawing illustrating a divisible rail according to a first embodiment of the present invention. FIG. 9 is a drawing of a rotor sail equipped with a centering device according to a second embodiment of the present invention. FIG. 10 is a drawing of a rotor sail equipped with a centering device according to a third embodiment of the present invention. FIG. 11 is a drawing of a rotor sail equipped with a centering device according to the fourth embodiment of the present invention. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the