KR-102961369-B1 - MULTI-LAYER SARRUS DEPLOYMENT AND LOCKING APPARATUS AND HEIGHT-ADJUSTABLE ROTOR SAIL INCLUDING THE SAME

KR102961369B1KR 102961369 B1KR102961369 B1KR 102961369B1KR-102961369-B1

Abstract

The present invention relates to a multilayer Sarus deployment and locking device and a height-adjustable rotor sail including the same. The multilayer Sarus deployment and locking device may include: a multilayer Sarus link structure in which a plurality of layers arranged in an up-and-down direction are kinematically linked to each other to deploy and retract; and a driving and locking means that applies a tensile force to at least a part of the multilayer Sarus link structure to deploy and retract the multilayer Sarus link structure, and maintains the deployed shape against bending deformation or outward spreading that occurs when the deployed structure rotates or an external force is applied in the deployed state.

Inventors

조규진
김장길
정순필
김찬

Assignees

서울대학교산학협력단

Dates

Publication Date: 20260508
Application Date: 20251217

Claims (18)

As a multi-layer Sarus deployment and locking device applied to a deployable structure capable of deployment and storage, A multilayer Sarus link structure in which multiple layers arranged in the vertical direction are kinematically interconnected to unfold and be stored; and It includes a driving and locking means that applies tensile force to at least a part of the multilayer Sarus link structure to unfold and retract the multilayer Sarus link structure, and maintains the unfolded shape against bending deformation or outward spreading caused by centrifugal force generated as the unfolded structure rotates in the unfolded state. A multilayer Sarus unfolding and locking device characterized in that the above-described multilayer Sarus link structure comprises a main Sarus linkage, a plurality of mid parts divided and arranged in an up-and-down direction corresponding to the main Sarus linkage to divide the height direction of the main Sarus linkage into a plurality of layers, and a connector that kinematically links the main Sarus linkage and the plurality of mid parts.
In paragraph 1, The above multilayer Sarus link structure includes a multilayer Sarus deployment frame, and A multilayer Sarus unfolding and locking device characterized in that the above-described multilayer Sarus unfolding frame is configured such that a plurality of Sarus-type link layers arranged in the vertical direction are interconnected in the same phase by a single driving operation, thereby performing linear unfolding and storage movements between the upper and lower parts of the multilayer Sarus unfolding frame.
In paragraph 2, The above-described multilayer Sarus deployment frame further includes upper and lower plates spaced apart in the vertical direction, and A multilayer Sarus deployment and locking device characterized by the above main Sarus linkage connecting the above upper and lower plates.
In paragraph 3, The length of the above mid part is set based on the length of the vertical link constituting the above main sarus linkage, and Accordingly, a multilayer Sarus deployment and locking device characterized by being arranged so that a parallel state between the upper and lower plates is maintained throughout the entire process of the multilayer Sarus deployment frame being deployed and stored.
In paragraph 3, The above plurality of mid parts are spaced apart from each other between the upper and lower plates to divide the height direction of the main sarus linkage into a plurality of divided sections, and A multilayer Sarus unfolding and locking device characterized in that, in the unfolded state, the span length of each divided section of the main Sarus linkage is configured to be shorter than the span length between the upper and lower plates in a single Sarus linkage structure in which the mid part is not placed.
In paragraph 3, The number of mid-parts and the vertical spacing mentioned above are, A multilayer Sarus unfolding and locking device characterized by being set so that the amount of deflection in each layer is 1/1000 or less of the corresponding layer spacing under centrifugal load generated when the above-described multilayer Sarus unfolding frame rotates at a predetermined rotational speed.
In paragraph 3, The above connector is composed of at least one of a rigid link and a tendon, and A multilayer Sarus deployment and locking device characterized in that at least a portion of the connector is formed as a tension member to avoid mechanical interference between the connectors in a multilayer structure.
In paragraph 1, In the case where the above-mentioned unfolding structure includes a folding panel section, The above-described multilayer Sarus link structure includes a plurality of multilayer Sarus deployment frames arranged along the perimeter of the deployment structure to form a cylindrical or polygonal ring shape in the deployed state, and A multilayer Sarus unfolding and locking device characterized in that the above multilayer Sarus unfolding frame comprises a ring frame that supports the folding frame of the above-described folding panel part in the unfolded state.
In paragraph 8, The above-mentioned folding panel section is, A hinge joint rotatably connected to a base structure or inner tower; A folding frame rotatably supported through the above hinge joint; and It includes an outer panel that is coupled to the above-mentioned folding frame and forms a cylindrical outer circumference shape in the unfolded state, A multilayer Sarus unfolding and locking device characterized in that the above-mentioned folding frame is supported in the height direction by the above-mentioned multilayer Sarus unfolding frame.
In paragraph 3, The above driving and locking means includes a wire rope section for deployment and storage, and The above-mentioned wire rope section for deployment and storage is, Wire rope transmitting tensile force to the above-mentioned multilayer Sarus link structure and folding panel section; A multilayer Sarus deployment and locking device characterized by including a guide pulley portion that guides the wire rope between the upper and lower plates and one or more mid parts.
In Paragraph 10, The above guide/pulley section includes a plurality of pulleys respectively disposed on the upper and lower plates and the plurality of mid parts, and The above wire rope is wound in multiple stages to reciprocate between the plurality of pulleys, A multilayer Sarus unfolding and locking device characterized in that the above-mentioned unfolding and storing wire rope portion forms a compound pulley system having a mechanical advantage of 10 or more.
In Paragraph 10, The above-described unfolding structure includes first and second outer panels facing each other, and first and second folding frames that support the first and second outer panels, respectively. The above wire rope forms a left-right symmetrical loop that alternately winds the leading ends of the first and second folding frames from the base and returns to the base, A multilayer Sarus unfolding and locking device characterized by the first and second folding frames and the first and second outer panels coupled thereto being simultaneously unfolded and stored in equal amounts.
In Paragraph 10, The above-mentioned driving and locking means includes a driving module, and The above-mentioned drive module is, A plurality of spools on which the wire rope of the above-mentioned unfolding and storage wire rope section is wound; A drive motor for driving the above plurality of spools; A worm gear set that reduces the rotation of the above-mentioned drive motor and provides a self-locking function; and A multilayer Sarus unfolding and locking device characterized by including a differential gearbox disposed between the worm gear set and the plurality of spools to distribute rotational speed and torque to the plurality of spools.
In Paragraph 13, The above differential gearbox is configured such that a uniform tensile force is applied to the left and right symmetrical loops of the wire rope as the plurality of spools rotate in conjunction with each other. A multilayer Sarus unfolding and locking device characterized by ensuring that the left and right unfolding of the above-mentioned multilayer Sarus link structure and folding panel part are carried out in the same phase.
In Paragraph 13, The above worm gear set has a self-locking function that prevents the plurality of spools from rotating in reverse due to external force or centrifugal force, and A multilayer Sarus unfolding and locking device characterized by maintaining the tensile force of the wire rope by the above self-locking function, thereby suppressing bending deformation or outward spreading of the multilayer Sarus link structure when the unfolded structure rotates in the unfolded state.
In paragraph 1, The above driving and locking means includes a locking module, and The above lock module is, A plurality of solenoid latches that mechanically fasten between the outer panels or folding frames of adjacent folding panel sections in the unfolded state, or between an adjacent mid-part and a main sarus linkage; and A multilayer Sarus deployment and locking device characterized by including a latch fixing part to which the above-mentioned solenoid latch is engaged.
In Paragraph 16, The above solenoid latches are arranged in multiple numbers along the height direction of the deployment structure, A multilayer Sarus unfolding and locking device characterized by distributing and supporting the gap that occurs between the outer panel or the folding frame due to centrifugal force and external wind pressure generated during rotation across the entire height direction.
As an adjustable rotor sail as a wind-assisted propulsion device for ships, An inner tower extending upward from the upper deck of a ship; A rotor body comprising a plurality of folding panel sections arranged around the inner tower, forming a cylindrical shape in the unfolded state and folding toward the upper deck in the stored state; and It includes a multilayer Sarus deployment and locking device according to any one of claims 1 to 17, and A height-adjustable rotor sail characterized in that the above-described multilayer Sarus link structure is arranged along the outer circumference of the upper part of the rotor body and supports the plurality of folded panel sections in the height direction in the unfolded state.

Description

Multi-layer sarrus deployment and locking apparatus and height-adjustable rotor sail including the same The present invention relates to a height-adjustable deployment and locking device applied to a rotating cylindrical structure, such as a rotor sail, which is a wind-assisted propulsion device for a ship. More specifically, the invention relates to a height-adjustable rotor sail structure that utilizes a multi-layer Sarrus mechanism to vertically retract and deploy the outer shell of the rotor sail and stably maintain its shape in the deployed state. A rotor sail is a device that generates lift by capturing wind on a rotating cylinder and utilizing the so-called Magnus effect. By using this generated force as an auxiliary propulsion system for ships, it can reduce fuel consumption and greenhouse gas emissions, making it a recently 주목ed eco-friendly ship technology. However, a rotor sail is a structure that protrudes significantly above the ship's upper deck. Consequently, interference with surrounding structures can occur in various situations, not only during navigation but also when passing under bridges, docking at ports, cargo handling, and preparing for inclement weather. In particular, rotor sails installed on large vessels often reach heights of tens of meters, requiring a device that can lower their height when necessary to meet the height restrictions required by shipping lanes. To address this requirement, various height adjustment methods have been proposed in the past. The most representative method is the tilting method, which involves tilting the entire rotor to a flat position. This method views the rotor sail and the supporting inner tower as a single large structure and rotates the entire unit around a hinge near the upper deck. It has the advantage of a relatively simple structural concept and is beneficial for ensuring rigidity because the rotor remains in a state close to a single unit. However, since the mass of the rotor and support structures reaches tens of tons, moving them as a whole requires large drive systems and extremely robust foundation structures. This inevitably leads to increased reinforcement of the upper deck and a larger scope for hull structural modifications. Consequently, this must be considered from the initial design stage for new vessels, while modifying existing ships increases installation costs and time, and imposes significant constraints on deck layout. To reduce the burden of this tilting method, a folding structure has also been proposed in which the upper part of the rotor is folded down. For example, this method utilizes a link-cable structure of the Sarrus or Maillard type to fold and unfold the frame supporting the rotor skin up and down. This method is advantageous in that it reduces the scope of hull modifications, as it allows for a reduction in height without creating large hinges or massive support structures on the upper deck. However, in the deployed state, a long link structure supports the cylindrical outer shell. If the spacing between the links is long and there are insufficient support points in between, the frame is prone to bending or spreading outward due to the centrifugal force and wind pressure generated when the rotor rotates at high speed. Some conventional technologies have attempted to maintain the cylindrical shape by placing magnets between the outer shell panels to attract each other; however, while this method may be somewhat effective during low-speed rotation or in a stationary state, the structural rigidity may be insufficient to mechanically withstand the large centrifugal force during high-speed rotation. In this case, the rotor's shape deforms, reducing the Magnus effect, and there is a risk of problems regarding fatigue and durability during long-term operation. Another method is the telescopic type. This structure is designed with multiple concentric tubes stacked like a telescope, allowing them to slide relative to each other to adjust their height. By precisely machining the gaps between the sleeves and properly installing guides, axial rigidity and circularity can be well maintained, which is advantageous for ensuring rigidity in the deployed state. However, since multiple tubes must slide against each other, very high machining precision is required, and friction and wear occur at the contact surfaces. If seawater and salt enter, corrosion and sealing problems also worsen. As a result, there are limitations such as increased manufacturing costs, complex maintenance, and increased risk of performance degradation and failure when operated for a long period in actual marine environments. In other words, conventional rotor sail height adjustment technologies each have distinct advantages as well as significant limitations. Tilting systems offer high rigidity and reliability in the deployed state, but require extensive upper deck reinforcement and foundation structure installation, resulting in high installation diffi