KR-20260062650-A - rotor sail

Abstract

A rotor sail according to one embodiment of the present invention comprises a base structure installed on a deck, a stator provided on the base structure, a rotor covering the outer side of the stator and rotating relative to the stator, a rotary drive unit transmitting power to the rotor, and a lower bearing unit having a plurality of roller bearings disposed at the lower part of the stator and in contact with the rotor, wherein the roller bearings may comprise a roller core rotatably installed on the stator and a roller cover covering the outer side of the roller core.

Inventors

• 최희영
• 김진성
• 강봉국
• 이동주
• 우상표

Assignees

• 에이치디한국조선해양 주식회사
• 에이치디현대중공업 주식회사
• 에이치디현대삼호 주식회사

Dates

Publication Date

20260507

Application Date

20241029

Claims (10)

1. Base structure installed on the deck; A stator provided in the above-mentioned base structure; A rotor that covers the outer side of the stator and rotates relative to the stator; A rotary drive unit that transmits power to the above rotor; and A lower bearing portion having a plurality of roller bearings disposed at the lower part of the stator and in contact with the rotor; comprising The above roller bearing A roller core rotatably installed on the above stator; and A rotor sail having a roller cover that covers the outer side of the roller core.
2. In Article 1, The above roller core has a slot on its outer surface, The above roller cover is a rotor sail having a protruding block inserted into the slot.
3. In Article 2, A rotor sail in which a gap is formed between the slot and the protruding block.
4. In Article 2, The above roller bearing A rotor sail further comprising an elastic member disposed between the above-mentioned protruding block and the above-mentioned slot.
5. In Paragraph 4, A rotor sail in which the above elastic member and the above roller cover have different elasticities.
6. In Article 2, The above slot is having a first groove disposed at both ends and a first projection extending from the first groove, The above protruding block is A rotor sail having a second projection inserted into the first groove and a second groove into which the first projection is inserted.
7. In Article 6, A rotor sail having a first gap formed between the first groove and the second projection and a second gap formed between the second groove and the first projection, each having a different cross-sectional area.
8. In Article 1, The above rotor A rotor sail having a rail in contact with the roller bearing above.
9. In Article 1, The above roller bearing further comprises a cover flange, a rotor sail.
10. In Article 1, The roller core and the roller cover are joined by screws, rotor sail

Description

rotor sail The present invention relates to a rotor sail. While propulsion systems on ships typically consist of propellers rotated by engines, the demand for eco-friendly ship designs has recently been increasing due to the expansion of greenhouse gas emission regulation zones. A rotor sail, or magnus rotor, refers to a cylindrical structure installed to rotate on a ship's deck; rotor sails can reduce fuel consumption by generating additional thrust through the magnus effect. Rotor sails are typically designed with a lifespan of 20 years, and the life cycle of the rotating body exceeds 60 million rotations. Consequently, the rails of the rotating body and the roller bearings of the stationary body are subject to countless contacts and wear. To reduce frictional resistance, the rails are typically made of metal, and the roller bearings are designed and manufactured using polymers. However, since manufacturing roller bearings from polymers cannot meet the required life cycle, a method of coating the surface of the roller bearings with polymers such as polyurethane, MC nylon, and PTFE is commonly used. In this case, polyurethane coating is applied by placing the metal roller in a mold and injecting liquid polyurethane and a curing agent to perform co-curing. Additionally, for MC nylon and PTFE coatings, the roller contact surface is coated using an adhesive after being pre-fabricated into a ring shape. In the case of conventional rotor sails, the rails and roller bearings come into repetitive contact due to the infinite rotation of the rotating body, which leads to design life issues with the adhesive, such as detachment and peeling of the interface between the roller bearing and the coating material. FIG. 1 is a cross-sectional view of a rotor sail according to one embodiment of the present invention. Figure 2 is a drawing showing a part of the rotor sail illustrated in Figure 1. Figure 3 is a drawing showing a part of the lower bearing section of the rotor sail of Figure 1. Figure 4 is a drawing for explaining the roller bearing of the lower bearing portion of Figure 3. Figure 5 is a cross-sectional view of the roller bearing of Figure 4 cut along the A-A' direction. Figure 6 is an enlarged view of a part of the roller bearing of Figure 5. Figure 7 is a cross-sectional view of the roller bearing of Figure 5 cut along the B-B' direction. FIG. 8a is a drawing illustrating a roller bearing according to another embodiment of the present invention. FIG. 8b is a drawing illustrating a roller bearing according to another embodiment of the present invention. FIG. 8c is a drawing illustrating a roller bearing according to another embodiment of the present invention. FIG. 8d is a drawing illustrating a roller bearing according to another embodiment of the present invention. Hereinafter, the following embodiments will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. Since the embodiments are capable of various modifications, specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the embodiments and the methods for achieving them will become clear by referring to the details described below in conjunction with the drawings. However, the embodiments are not limited to those disclosed below and can be implemented in various forms. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another. In the following embodiments, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. Where an embodiment can be implemented differently, a specific process sequence may be performed differently from the order described. For example, two processes described consecutively may be performed substantially simultaneously or proceed in the reverse order of the description. In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the following embodiments are not necessarily limited to those illustrated. In the following, a ship ma