Rotor sail and method for installing rotor sail

Abstract

A rotor sail according to one embodiment of the present invention may comprise: a base structure installed on a deck; a stator provided on the base structure; a rotor covering the outside of the stator and receiving power so as to rotate with respect to the stator; a lower bearing unit disposed at the bottom of the stator and having a plurality of roller bearings; a rail disposed at a lower end of the rotor and coming into contact with the plurality of roller bearings; and a balancing member attached to the rail to adjust the balance of the rotor.

Description

Rotor sail and method of installing the rotor sail

[0001] The present invention relates to a rotor sail and a method for installing a rotor sail.

[0002]

[0003] 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.

[0004] The rotor sail rotates by contacting the roller bearings placed on the stator and the rotor rails. However, a problem occurred in which the rotor sail was damaged due to the load of seawater continuously applied to the rails during operation. In addition, a problem occurred in which rotational resistance was generated by vertical members within the rails to structurally reinforce the rotor sail rails, thereby hindering the rotation of the rotor.

[0005] In addition, if rotational imbalance occurs during the process of rotating the rotor sail after it has been installed on a vessel, a method to adjust the balance of the rotor sail is required.

[0006]

[0007] The present invention aims to prevent damage caused by seawater to the rails within the rotor sail while suppressing the generation of rotational resistance during the rotation of the rotor sail.

[0008] In addition, the purpose is to easily adjust the balance of the rotor sail by placing a balancing member on the rail.

[0009]

[0010] A rotor sail according to one embodiment of the present invention for solving the problem described above may include a base structure installed on a deck, a stator provided on the base structure, a rotor that covers the outer side of the stator and rotates relative to the stator by receiving power, a lower bearing part disposed at the bottom of the stator and having a plurality of roller bearings, a rail disposed at the bottom of the rotor and in contact with the plurality of roller bearings, and a balancing member attached to the rail to adjust the balance of the rotor.

[0011] A rotor sail according to one embodiment of the present invention may further include a sensor unit for detecting the balance of the rotation axis of the rotor and a control unit for specifying a correction position on the rail based on data measured by the sensor unit.

[0012] In one embodiment of the present invention, the control unit can calculate the weight of the balancing member attached to the correction position.

[0013] In one embodiment of the present invention, the rail may have a first rail body disposed at the bottom of the rotor and in contact with a plurality of roller bearings, a second rail body disposed on the outside of the first rail body and parallel to the surface of the rotating body, a first web connecting the first rail body and the second rail body, and a second web connecting the first rail body and the second rail body and disposed to face the first web.

[0014] In one embodiment of the present invention, at least one of the first web and the second web may be provided with a plurality of balancing holes to which the balancing member is selectively attached, such that a plurality of the first web and the second web are spaced apart in the circumferential direction.

[0015] In one embodiment of the present invention, the balancing member may have a first weight body installed in one of the plurality of balancing holes and a second weight body installed in the other of the plurality of balancing holes.

[0016] A rotor sail according to one embodiment of the present invention may include 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 by receiving power, a lower bearing portion disposed at the lower side of the stator and having a plurality of roller bearings, a rail having a first rail body disposed at the lower side of the rotor and in contact with the plurality of roller bearings, and a second rail body disposed on the outer side of the first rail body and parallel to the surface of the rotating body.

[0017] In one embodiment of the present invention, the rail may further have a first web connecting the first rail body and the second rail body, and a second web connecting the first rail body and the second rail body and positioned to face the first web.

[0018] In one embodiment of the present invention, the first web may be connected to the upper side such that the inner side protrudes from the upper end of the first rail body, and the outer side may be connected to the end of the second rail body.

[0019] In one embodiment of the present invention, the second web may be connected to the lower side such that the inner side protrudes from the lower end of the first rail body, and the outer side may be connected to the inner surface of the second rail body.

[0020] In one embodiment of the present invention, the first web may be connected to the lower end of the rotor.

[0021] In one embodiment of the present invention, the rail may have an empty space between the first web and the second web.

[0022] In one embodiment of the present invention, at least one of the first web and the second web may be provided with a plurality of balancing holes to which a balancing member is optionally attached, such that a plurality of such webs are spaced apart in the circumferential direction.

[0023] A rotor sail installation method according to one embodiment of the present invention may include the steps of installing a stator having a plurality of roller bearings on a base structure, installing a rotor on the outside of the stator, installing a rail in contact with the roller bearing on the lower part of the rotor, driving the rotor to measure the alignment of the rotor's rotation axis, and attaching a balancing member to the rail to set the balance of the rotor.

[0024] In one embodiment of the present invention, the step of setting the balance of the rotor may include the step of specifying a correction position on the rail and the step of calculating the weight of the balancing member attached to the correction position.

[0025] Other aspects, features, and advantages other than those described above will become clear from the following drawings, claims, and detailed description of the invention.

[0026]

[0027] Embodiments of the present invention can reduce the effect of seawater loads that may occur on the rail by positioning the first web of the rail within the rotor sail on the top of the first rail body.

[0028] In addition, embodiments of the present invention can structurally reinforce the rail by additionally arranging a second web, and at the same time suppress the occurrence of rotational resistance in the direction of the rotation axis that may occur during the rotation of the rotor sail.

[0029] In addition, embodiments of the present invention can easily and accurately adjust the imbalance that occurs during the actual rotation of the rotor sail after it is installed on the ship by adjusting the balance of the rail using a balancing member.

[0030] Of course, the scope of the present invention is not limited by these effects.

[0031]

[0032] FIG. 1 is a cross-sectional view of a rotor sail according to one embodiment of the present invention.

[0033] Figure 2 is a drawing for explaining the lower bearing part and rail of the rotor sail of Figure 1.

[0034] Figure 3 is a cross-sectional view showing the side of Figure 2.

[0035] Figure 4 is a drawing to explain the rail of Figure 2.

[0036] Figure 5 is a top view of the state in which a balancing member is positioned when the location of the imbalance occurrence in the rail of Figure 4 coincides with the location of the hole.

[0037] FIG. 6 is a top view of the state in which a balancing member is positioned when the location of the imbalance occurrence in the rail of FIG. 4 is located between a plurality of holes.

[0038] FIG. 7 is a drawing for explaining the state in which balancing members are placed in the first web and the second web.

[0039] Figure 8 is a flowchart showing the installation method of the rotor sail of Figure 1.

[0040]

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In the following embodiments, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] In the following, a ship may be a large vessel such as an oil tanker, LNG carrier, LPG carrier, container ship, car carrier, bulk carrier, or mineral carrier that carries a large amount of minerals, crude oil, natural gas, or thousands of containers in its cargo hold and sails the ocean, but is not limited thereto and may include all types of ships and offshore structures of various forms.

[0050] A rotor sail (100) according to one embodiment of the present invention is provided on the deck of a ship at least once and can convert wind power into propulsion force in a desired direction by rotating directly using power.

[0051] FIG. 1 is a cross-sectional view of a rotor sail according to an embodiment of the present invention, and FIG. 2 is a drawing for explaining the lower bearing portion and rail of the rotor sail of FIG. 1. FIG. 3 is a cross-sectional view showing the side of FIG. 2, and FIG. 4 is a drawing for explaining the rail of FIG. 2.

[0052] Referring to FIGS. 1 to 4, the rotor sail (100) of the present invention may include a base structure (110), a stator (120), a rotor (130), a rotational drive unit (140), a lower bearing unit (150), a rail (160), and a balancing member (170).

[0053] The base structure (110) is fixedly installed on the deck, and a stator (120) can be installed on the upper part.

[0054] The stator (120) may be vertically positioned on a base structure (110) fixed on a deck and may form the axis of the rotor (130). The stator (120) may be a hollow cylindrical structure and may have a rotary drive unit (140) mounted on its upper portion. Additionally, a lower bearing unit (150) may be positioned at the lower portion of the stator (120) and may be equipped with a plurality of roller bearings (151).

[0055] The rotor (130) covers the outside of the stator (120) and can rotate relative to the stator (120) by receiving power from the rotational drive unit (140).

[0056] Specifically, the rotor (130) is rotatably connected to a lower bearing part (150) installed at the bottom of the stator (120) and can receive power from a rotary drive part (140) installed at the top of the stator (120).

[0057] The rotor (130) is a cylindrical structure formed to surround the outer side of the stator (120), and can rotate 360 ​​degrees with power applied by a rotational drive unit (140) using the stator (120), which is installed on the deck of the ship, as its axis. At this time, due to hydrodynamic interference between the wind around the ship and the cylindrical rotor (130), the wind can be converted into propulsion force for the ship.

[0058] The rotor (130) may be provided with a cover portion (131), a connecting portion (132), and an end plate (133).

[0059] The cover portion (131) may be cylindrical as the outermost surface of the rotor sail (100).

[0060] The connecting part (132) is connected to the cover part (131) and is positioned to come into contact with the first web (163) of the rail (160) to be described later, so that the rotor (130) can be stably connected to the rail (160).

[0061] The end plate (133) can be installed on the open upper portion of the rotor (130) and may consist of a disc and a stiffener. In this case, the disc may be an area corresponding to the open upper portion of the rotor (130), and the stiffener is intended to reinforce the central area of ​​the disc and may be formed by extending a plurality of them radially from the center of the disc.

[0062] The end plate (133) of this embodiment can be made of glass fiber reinforced plastic (GFRP) or carbon fiber reinforced plastic (CFRP) to improve the structural performance of the rotor sail (100) by reducing the weight of the end plate (133).

[0063] A lower bearing portion (150) is located at the bottom of the rotor (130) and may include a rail (132) that contacts the lower roller bearing (151).

[0064] The rotor (130) can be rotated by transmitting power from the rotational drive unit (140) through the disk (141). At this time, as the rotor (130) rotates around the stator (120), which is the vertical central axis, increased pressure may be generated on one side and decreased pressure may be generated on the opposite side. The positive pressure and negative pressure generated on each side of the rotor (130) can generate propulsion force as a force to move the ship.

[0065] In addition, since the direction in which positive and negative pressure are formed can be different depending on the direction of the rotor (130), the direction of operation of the vessel can be controlled by changing the direction of the rotor (130) to rotate clockwise or counterclockwise.

[0066] The vessel of this embodiment is not limited to generating propulsion force through the driving of the rotor (130), and it is understood that it may be combined with conventional embodiments. For example, when the operation of the vessel by the main engine (not shown) and the rudder, etc., constitutes the main operation, the rotor (130) may perform an auxiliary role. Alternatively, the operation by the rotor (130) may be the main operation, and the operation of the vessel by the main engine and rudder may serve as an auxiliary operation. In this way, the driving of the rotor (130) can be performed as needed in various situations.

[0067] A rotary drive unit (140) is installed on the upper part of the stator (120) and can be connected to a disk (141). This rotary drive unit (140) can generate power capable of rotating the rotor (130) and transmit rotational force to the rotor (130) through the disk (141).

[0068] The rotary drive unit (140) may include a motor, a gearbox, a drive shaft, a drive gear, a driven gear, and a driven shaft. The motor generates driving force and transmits it to the gearbox, and may be installed inside the stator (120). Inside the gearbox, a drive shaft coupled to the motor and rotated by the motor, a drive gear provided on the drive shaft, a driven gear that rotates in mesh with the drive gear, and a driven shaft coupled to the driven gear to support the rotation of the driven gear may be provided. The drive gear and the driven gear may be reduction gears with a reduction ratio of 6:1, but are not limited thereto and may use reduction gears with various reduction ratios. At this time, the drive shaft and the driven shaft may each rotate by means of a bearing.

[0069] The disk (141) may be in a shape corresponding to the inner circumference of the rotor (130), for example, in the shape of a disc, and its outer circumference may be fixedly connected to the inner circumference of the rotor (130). The disk (141) may be connected to a rotational drive unit (140) to receive power from the rotational drive unit (140) and impart rotational force to the rotor (130).

[0070] The lower bearing portion (150) is positioned at the bottom of the stator (120) and may have a plurality of roller bearings (151).

[0071] The lower bearing portion (150) may include a plurality of roller bearings (151) and a bearing shaft (152) that are in contact with the rotor (130).

[0072] The lower bearing portion (150) may be composed of a plurality of roller bearings (151) and may be installed on a base structure (110).

[0073] The roller bearing (151) can rotate around the bearing axis (152) by contacting the rail (160). The roller bearing (151) is positioned protruding from the outside of the stator (120) and can be arranged in multiple numbers at regular intervals along the inner surface of the rail (160) so as not to collide with adjacent roller bearings (151) when rotating.

[0074] The bearing shaft (152) is positioned at the center of the roller bearing (151) and one end can be fixed to the base structure (110).

[0075] The rail (160) is positioned at the bottom of the rotor (130) and can come into contact with a plurality of roller bearings (151).

[0076] At this time, the rail (160) may be manufactured separately and installed on the inner surface of the rotor (130), or may be manufactured integrally with the rotor (130), and may be made of a metal material to reduce frictional resistance with the roller bearing (151).

[0077] The rail (160) may include a first rail body (161), a second rail body (162), a first web (163), and a second web (164).

[0078] The first rail body (161) is positioned at the bottom of the rotor (130) and can come into contact with a plurality of roller bearings (151).

[0079] The length (D2) of the first rail body (161) is positioned longer than the width of the roller bearing (151), so that the roller bearing (151) can rotate stably by contacting the rail (160) as a whole.

[0080] The first rail body (161) may be positioned with a height in a direction parallel to the bearing axis (152) and may be provided with a first stage (161a), a second stage (161b), and a third stage (161c) in the height direction of the first rail body (161).

[0081] The first section (161a) is the uppermost part of the first rail body (161) and can come into contact with the first web (163). The first section (161a) protrudes above the top of the first web (163) so that the connecting part (132) of the rotor (130) can be stably connected to the first rail body (161). Accordingly, the height (T1) of the first section (161a) can be formed to be longer than the height of the connecting part (132).

[0082] The second stage (161b) is located between the first web (163) and the second web (164) to provide a contact area for the roller bearing (151). The height (T2) of the second stage (161b) may be longer than the height (T1) of the first stage and the height (T3) of the third stage.

[0083] The third section (161c) is the lowest part of the first rail body (161) and can come into contact with the second web (164). The third section (161c) protrudes below the second web (164) so ​​that the second web (164) can be stably connected to the first rail body (161).

[0084] The second rail body (162) is positioned on the outside of the first rail body (161) and can be positioned parallel to the surface of the rotor (130).

[0085] The second rail body (162) is positioned on the base structure (110) at a certain height (D1) at the outermost edge of the rail (160) to prevent seawater from flowing into the rotor sail (100).

[0086] The first web (163) can connect the first rail body (161) and the second rail body (162).

[0087] The first web (163) can be connected to the upper side so that the inner side protrudes from the upper end of the first rail body (161), and the outer side can be connected to the end of the second rail body (162).

[0088] The first web (163) can be connected to the bottom of the rotor (130). Specifically, the first web (163) can be connected to the connecting part (132) of the rotor (130) and rotate together with the rotor (130).

[0089] The first web (163) can serve as a horizontal reinforcement for the rail (160) by being positioned horizontally between the first rail body (161) and the second rail body (162).

[0090] The first web (163) is located at the top of the first rail body (161), so that the lower height of the rail (160) connected to the first web (163) is increased, thereby reducing the effect of seawater load that may occur on the rail (160).

[0091] The second web (164) connects the first rail body (161) and the second rail body (162) and can be positioned to face the first web (163).

[0092] The second web (164) may be connected to the lower side so that the inner side protrudes from the lower end of the first rail body (161), and the outer side may be connected to the inner surface of the second rail body (162). The second web (164) can reinforce the structure of the entire rail (160) to ensure the structural stability of the rail (160).

[0093] The second web (164) can serve as a horizontal reinforcement for the rail (160) by being horizontally positioned between the first rail body (161) and the second rail body (162) together with the first web (163).

[0094] The rotor sail (100) of the present invention can structurally reinforce the rail (160) by additionally placing a second web (164) at the bottom of the first web (163), and at the same time suppress the occurrence of rotational resistance in the direction of the rotation axis (L) that may occur when the rotor sail (100) rotates.

[0095] The first web (163) and the second web (164) are arranged parallel to the base structure (110) to reinforce the structure of the rail (160) without hindering rotation in the direction of the rotation axis (L) of the rotor sail (100).

[0096] The length (d) of the first web (163) and the second web (164) can be implemented in various ways and can be determined according to the diameter of the stator (120) or the rotor (130). The minimum diameter of the rotor (130) can correspond to the diameter of the roller bearing (151) installed on the outer surface of the stator (120), and the maximum diameter of the rotor (130) can be determined according to the length (d) of the first web (163) and the second web (164).

[0097] At this time, the rail (160) may have an empty space between the first web (163) and the second web (164).

[0098] Specifically, a space may be formed between the first web (163) and the second web (164) due to the height (T2) of the second step (161b). The second web (164) may be provided with a construction hole (not shown), and a worker may perform work in the space between the first web (163) and the second web (164) through the construction hole (not shown).

[0099] Additionally, at least one of the first web (163) and the second web (164) may be provided with a plurality of balancing holes (H) to which a balancing member (170) is optionally attached, and a plurality of such balancing holes are arranged spaced apart in the circumferential direction.

[0100] Balancing holes (H) can be arranged in the first web (163) and the second web (164) at predetermined intervals. For example, 12 balancing holes (H) can be arranged in each of the first web (163) and the second web (164) to balance the rail (160).

[0101] The balancing member (170) is attached to the rail (160) and can adjust the balance of the rotor (130).

[0102] Specifically, the balancing member (170) may be placed in at least one balancing hole (H) of the first web (163) and the second web (164).

[0103] The balancing member (170) may be a bolt member having a diameter that matches the balancing hole (H), and may be joined to the balancing hole (H) by a bolt fastening method.

[0104] The balancing member (170) may have a first weight body (171) installed in one of the plurality of balancing holes (H) and a second weight body (172) installed in the other of the plurality of balancing holes (H).

[0105] FIG. 5 is a top view of a state in which a balancing member is positioned when the location of the imbalance occurring in the rail of FIG. 4 coincides with the location of the hole, and FIG. 6 is a top view of a state in which a balancing member is positioned when the location of the imbalance occurring in the rail of FIG. 4 is a top view of a state in which a balancing member is positioned between a plurality of holes. FIG. 7 is a drawing for explaining the state in which a balancing member is positioned in the first web and the second web.

[0106] Hereinafter, with reference to FIGS. 5 to 7, a method for balancing a rotor sail (100) by placing a balancing member (170) on a rail (160) will be described in detail.

[0107] The sensor unit (S) can detect the balance of the rotation axis (L) of the rotor (130).

[0108] The sensor unit (S) can detect whether an imbalance occurs during the rotation of the rotor (130) and the location (U) where the imbalance occurs, and notify the control unit (C) of this.

[0109] The control unit (C) can determine the correction position on the rail (160) based on the data measured by the sensor unit (S).

[0110] If the location where the imbalance occurs (U) coincides with the location of the balancing hole (H), the correction location may be the location of the balancing hole (H) where the imbalance occurred. On the other hand, if the location where the imbalance occurs (U) does not coincide with the location of the balancing hole (H), correction can be made by placing a plurality of balancing members (170) in a plurality of balancing holes (H).

[0111] In addition, the control unit (C) can calculate the weight of the balancing member (170) attached to the correction position.

[0112] When the imbalance occurs at a location (U) that does not coincide with the location of a balancing hole (H), and the imbalance of the rail (160) is corrected using a plurality of balancing members (170), balancing members (170) of different weights may be placed in different balancing holes (H).

[0113] Referring to FIG. 5, if an imbalance occurs at a location corresponding to a balancing hole (H) in the second web (164), a balancing member (170) having an imbalance correction mass W can be placed at the location (U) where the imbalance occurred to balance the rail (160) of the second web (164).

[0114] On the other hand, referring to FIG. 6, if the location where the imbalance occurs (U) does not coincide with the location of the balancing hole (H), a first weight body (171) and a second weight body (172) each having an imbalance correction mass W / 2 can be placed in two balancing holes (H) that are spaced equally apart to the left and right from the location where the imbalance occurs (U).

[0115] Additionally, referring to FIG. 7, if an imbalance of the rail (160) occurs between the first web (163) and the second web (164), the balance can be adjusted by placing a first weight body (171) in the balancing hole (H) of the first web (163) and a second weight body (172) in the balancing hole (H) of the second web (164).

[0116] In this way, by using the balancing member (170) to adjust the balance of the rail (160), the imbalance that occurs during the actual rotation of the rotor sail (100) after the rotor sail (100) is installed on the ship can be easily and accurately adjusted.

[0117] Figure 8 is a flowchart showing the installation method of the rotor sail of Figure 1.

[0118] Below, with reference to FIG. 8, the installation method of the rotor sail (100) will be described in detail.

[0119] A method for installing a rotor sail (100) may include the steps of: installing a stator (120) having a plurality of roller bearings (151) on a base structure (110) (S1); installing a rotor (130) on the outside of the stator (120) (S2); installing a rail (160) in contact with the roller bearings (151) on the lower part of the rotor (130) (S3); driving the rotor (130) to measure the alignment of the rotation axis (L) of the rotor (130) (S4); and attaching a balancing member (170) to the rail (160) to set the balance of the rotor (130) (S5).

[0120] Step (S1) of installing a stator (120) having a plurality of roller bearings (151) on a base structure (110) involves installing the stator (120), which is an internal structure of the rotor sail (100), and placing a rotary drive unit (140) on the top of the stator (120).

[0121] Step (S2) of installing a rotor (130) on the outside of a stator (120) may be installed on the outside of a stator (120) having a diameter larger than that of the stator (120) and spaced apart from the stator (120) by a predetermined distance. At this time, the rotor (130) may rotate by receiving power from a rotational drive unit (140) positioned on the top of the stator (120).

[0122] Step (S3) of installing a rail (160) in contact with a roller bearing (151) on the lower part of the rotor (130) can be configured so that the rail (160) is positioned on the lower part of the rotor (130) so that it can rotate smoothly by engaging with the roller bearing (151) when the rotor (130) rotates.

[0123] The step (S4) of driving the rotor (130) to measure the alignment of the rotation axis (L) of the rotor (130) can measure whether the rotation axis (L) is vertically balanced on the base structure (110) when the rotor (130) installed on the ship is rotated.

[0124] The step (S5) of setting the balance of the rotor (130) involves transmitting the location where the imbalance occurred (U) to the control unit (C) when the sensor unit (S) detects an imbalance of the rotor (130), and the control unit (C) can determine the correction location on the rail (160) based on the data measured by the sensor unit (S).

[0125] Specifically, the step (S5) of setting the balance of the rotor (130) may consist of the step of specifying a correction position on the rail (160) and the step of calculating the weight of the balancing member (170) attached to the correction position.

[0126] The step of specifying the correction position in the rail (160) can be specified by placing one balancing member (170) in the balancing hole (H) when the location where the imbalance occurs (U) coincides with the location of the balancing hole (H), and by placing multiple balancing members (170) in multiple balancing holes (H) when the location where the imbalance occurs (U) does not coincide with the location of the balancing hole (H).

[0127] Accordingly, the step (S5) of setting the balance of the rotor (130) can be adjusted so that the rail (160) is finally balanced by placing a calculated balancing member (170) at a correction position that can resolve the imbalance of the rail (160).

[0128] A rotor sail (100) according to one embodiment of the present invention may reduce the impact of seawater loads that may occur on the rail by placing a first web (163) on the upper part of a first rail body (161). In addition, a rotor sail (100) according to one embodiment of the present invention may reinforce the structure of the rail (160) more stably without hindering rotation in the direction of the rotation axis (L) of the rotor sail (100) by placing a second web (164) at the lower part of the first web (163) so as to be parallel to the first web (163).

[0129] A rotor sail (100) according to one embodiment of the present invention can adjust the balance of the rail (160) by providing a balancing member (170) in a balancing hole (H) disposed in the first web (163) and the second web (164). Through this, the imbalance that occurs during the actual rotation of the rotor sail (100) after the rotor sail (100) is installed on the ship can be easily and accurately adjusted.

[0130] As such, the present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.

[0131] The specific practices described in the embodiments are examples and do not limit the scope of the embodiments in any way. Furthermore, unless specifically stated as "essential," "importantly," etc., components may not be strictly necessary for the application of the present invention.

[0132] In the specification of the embodiments (particularly the claims), the use of the term "the above" and similar descriptive terms may be in both singular and plural. Furthermore, where a range is described in the embodiments, it is considered to include the invention with respect to individual values ​​within said range (unless otherwise stated), and is equivalent to describing each individual value constituting said range in the detailed description. Finally, regarding the steps constituting the method according to the embodiments, unless explicitly stated in order or otherwise stated, said steps may be performed in a suitable order. The embodiments are not necessarily limited by the order in which said steps are described. The use of all examples or exemplary terms (e.g., etc.) in the embodiments is merely for the purpose of describing the embodiments in detail, and the scope of the embodiments is not limited by said examples or exemplary terms unless limited by the claims. Furthermore, those skilled in the art will understand that various modifications, combinations, and changes may be made according to design conditions and factors within the scope of the claims or equivalents to which they are added.

Claims

1. A base structure installed on the deck; A stator provided in the above base structure; A rotor that covers the outer side of the stator and receives power to rotate relative to the stator; A lower bearing portion disposed at the lower part of the above stator and having a plurality of roller bearings; A rail positioned at the bottom of the rotor and in contact with a plurality of the roller bearings; and A rotor sail comprising a balancing member attached to the rail and adjusting the balance of the rotor.

2. In Paragraph 1, A sensor unit for detecting the balance of the rotation axis of the above rotor; and A rotor sail further comprising: a control unit that specifies a correction position on the rail based on data measured by the sensor unit.

3. In Paragraph 2, The above control unit A rotor sail that calculates the weight of the balancing member attached to the above correction position.

4. In Paragraph 1, The above rail is A first rail body positioned at the bottom of the rotor and in contact with a plurality of the roller bearings; A second rail body positioned on the outer side of the first rail body and parallel to the surface of the rotating body; A first web connecting the first rail body and the second rail body; and A rotor sail having a second web connected to the first rail body and the second rail body and positioned to face the first web.

5. In Paragraph 4, At least one of the first web and the second web is A rotor sail having a plurality of balancing holes arranged spaced apart in the circumferential direction, to which the balancing member is selectively attached.

6. In Paragraph 5, The above balancing member is A first weight body installed in any one of the plurality of balancing holes; and A rotor sail having a second weight body installed in another of the plurality of balancing holes.

7. Base structure installed on the deck; A stator provided in the above base structure; A rotor that covers the outer side of the stator and receives power to rotate relative to the stator; A lower bearing portion disposed at the lower part of the above stator and having a plurality of roller bearings; and A rotor sail comprising: a rail having a first rail body disposed at the bottom of the rotor and in contact with a plurality of roller bearings, and a second rail body disposed on the outer side of the first rail body and parallel to the surface of the rotor.

8. In Paragraph 7, The above rail is A first web connecting the first rail body and the second rail body; and A rotor sail having a second web that connects the first rail body and the second rail body and is positioned to face the first web.

9. In Paragraph 8, The above first web is A rotor sail, the inner side being connected to the upper side so that the upper end of the first rail body protrudes, and the outer side being connected to the end of the second rail body.

10. In Paragraph 8, The above second web is A rotor sail, the inner side being connected to the lower side so that the lower end of the first rail body protrudes, and the outer side being connected to the inner surface of the second rail body.

11. In Paragraph 8, The above first web is A rotor sail connected to the bottom of the above rotor.

12. In Paragraph 8 The above rail is A rotor sail having an empty space between the first web and the second web.

13. In Paragraph 8 At least one of the first web and the second web is A rotor sail having a plurality of balancing holes arranged spaced apart in the circumferential direction, to which a balancing member is optionally attached.

14. A step of installing a stator having multiple roller bearings on a base structure; Step of installing a rotor on the outside of the stator; A step of installing a rail in contact with the roller bearing on the lower part of the rotor; A step of driving the rotor to measure the alignment of the rotor's rotation axis; A method for installing a rotor sail, comprising the step of attaching a balancing member to the rail to set the balance of the rotor.

15. In Paragraph 14, In the step of setting the balance of the rotor mentioned above, A step of specifying a correction position on the above rail; and A method for installing a rotor sail, comprising the step of calculating the weight of the balancing member attached to the above correction position.

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