New dynamic submarine cables and floating wind turbines

Abstract

The present invention discloses a novel dynamic submarine cable and a floating wind turbine, wherein the novel dynamic submarine cable comprises a submarine cable body, a linear retainer and a plurality of buoyancy blocks, wherein the submarine cable body has a stretching portion, the stretching portion is spiral, and the extension direction of the spiral axis of the stretching portion has an angle with the vertical direction, the linear retainer is connected to the stretching portion, and the linear retainer is used to keep the stretching portion in a spiral shape at all times, the buoyancy block is connected to the stretching portion, and the buoyancy block is used to make the stretching portion be located at a preset height underwater, and the plurality of buoyancy blocks are arranged at intervals along the extension direction of the spiral axis of the stretching portion. The novel dynamic submarine cable of the embodiment of the present invention has a spiral line shape in the stretching portion, which can achieve a longer stretching effect within a shorter distance compared to the S-shaped line shape in the related art. Moreover, after the submarine cable body is stretched, the linear retainer is used to keep the stretching portion of the submarine cable body in a spiral shape, thereby improving the stability of the line shape of the submarine cable body.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore power generation, and in particular to a novel dynamic submarine cable and a floating wind turbine. Background Art

[0002] Offshore floating wind turbines are an innovative wind power generation technology that allows wind turbines to be installed in deep sea areas with a water depth of more than 50 meters. This type of wind turbine is different from traditional fixed offshore wind turbines, which are usually installed in relatively shallow waters and require a sturdy support structure. Floating wind turbines can be deployed without considering the seabed topography and geological conditions. Floating wind turbines consist of upper wind turbines, floating platforms, mooring systems and dynamic submarine cables.

[0003] The electricity generated by wind turbines is transmitted to the onshore power grid via dynamic submarine cables, which need to be able to swing with the flow of seawater and the movement of wind turbines, while maintaining sufficient strength and stability to withstand the impact of the marine environment.

[0004] In the related art, the linearity of the dynamic submarine cable is an S-shaped line or a double S-shaped line in a certain plane. However, such S-shaped and double S-shaped lines occupy a larger sea area and are easily hooked by passing ships and damaged; the line shape is difficult to maintain; and when subjected to sudden loads, the impact on the dynamic submarine cable is relatively large. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, an embodiment of the present invention proposes a new type of dynamic submarine cable, which can achieve longer stretching within a shorter distance, is easy to maintain the line shape, is convenient for construction, and can effectively reduce impact loads.

[0007] The new dynamic submarine cable of the embodiment of the present invention includes: a submarine cable body, a linear retainer and a plurality of buoyancy blocks, the submarine cable body having a stretching portion, the stretching portion being spiral, an extension direction of the spiral axis of the stretching portion having an angle with the vertical direction, the linear retainer being connected to the stretching portion, the linear retainer being used to keep the stretching portion in a spiral shape at all times, the buoyancy block being connected to the stretching portion, the buoyancy block being used to keep the stretching portion at a preset height underwater, and a plurality of the buoyancy blocks being arranged at intervals along the extension direction of the spiral axis of the stretching portion.

[0008] The new dynamic submarine cable of the embodiment of the present invention adopts a spiral line shape in the stretching part, which can achieve a longer stretching effect in a shorter distance compared with the S-shaped line shape in the related art. Moreover, after the submarine cable body is stretched, the line shape retainer is used to keep the stretching part of the submarine cable body in a spiral shape, thereby improving the stability of the line shape of the submarine cable body.

[0009] In some embodiments, the length of the stretching portion in the extension direction of the spiral axis is defined as l, the number of spiral turns of the stretching portion is defined as n, the spiral radius of the stretching portion is defined as r, and the spiral length of the stretching portion is defined as L, satisfying the relationship: L = [(2·r·π·n) 2 +l 2 ] 0.5 .

[0010] In some embodiments, the stretching portion has a compression section and a relaxation section connected to each other, and the tension stiffness of the relaxation section is smaller than the tension stiffness of the compression section.

[0011] In some embodiments, the number of spiral turns of the relaxation section is smaller than the number of spiral turns of the compression section.

[0012] In some embodiments, there are at least two relaxation segments, both ends of the stretching portion in the extension direction of the spiral axis are relaxation segments, and the pressing segments and the relaxation segments are alternately arranged.

[0013] In some embodiments, the linear retainer includes a spring and a clamp, the spiral trajectory of the spring is the same as the spiral trajectory of the stretching portion, the spring is arranged parallel to the stretching portion, and the spring is connected to the stretching portion through the clamp.

[0014] In some embodiments, the ratio of the tensile stiffness of the spring to the tensile stiffness of the tensile portion is 1.1 to 1.8.

[0015] In some embodiments, the clamp has a submarine cable through hole and a spring through hole, the stretching part passes through the submarine cable through hole, the outer peripheral wall of the stretching part fits with the hole wall of the submarine cable through hole, the spring passes through the spring through hole, and the outer peripheral wall of the spring fits with the hole wall of the spring through hole.

[0016] In some embodiments, there are a plurality of the clamps, and the plurality of the clamps are arranged at intervals along the spiral direction of the spring.

[0017] An embodiment of the present invention provides a floating wind turbine.

[0018] The floating wind turbine of the embodiment of the present invention comprises: a wind turbine set, a buoy, a mooring system and a submarine cable. The submarine cable is the new dynamic submarine cable described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of a novel dynamic submarine cable according to an embodiment of the present invention.

[0020] Figure 2 It is a partial schematic diagram of a novel dynamic submarine cable according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram comparing the line types of a dynamic submarine cable in the related art and a novel dynamic submarine cable in an embodiment of the present invention.

[0022] Figure 4 Schematic diagram of a clamp according to an embodiment of the present invention.

[0023] Figure 5 Schematic diagram of a floating wind turbine according to an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram comparing the dynamic submarine cable before and after stretching of the related technology.

[0025] Figure 7 Schematic diagram of the novel dynamic submarine cable before and after stretching according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] Wind turbine 100, floating body 101, mooring system 102, submarine cable 103,

[0028] Submarine cable body 1, stretching portion 11, slack section 111, compression section 112,

[0029] Linear retainer 2, spring 21, clamp 22, submarine cable perforation 221, spring perforation 222,

[0030] Buoyancy block 3. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] The novel dynamic submarine cable according to the embodiment of the present invention is described below with reference to the accompanying drawings.

[0033] like Figure 1 and Figure 2 As shown, the novel dynamic submarine cable according to the embodiment of the present invention comprises: a submarine cable body 1 , a linear retainer 2 and a plurality of buoyancy blocks 3 .

[0034] The submarine cable body 1 has a stretching part 11, and the stretching part 11 is spiral, that is, the new dynamic submarine cable of the embodiment of the present invention is a spiral line type. There is an angle between the extension direction of the spiral axis of the stretching part 11 and the vertical direction, that is, the spiral axis of the stretching part 11 does not extend in the vertical direction to ensure the reliability of the stretching of the new dynamic submarine cable of the embodiment of the present invention. The linear retainer 2 is connected to the stretching part 11, and the linear retainer 2 is used to keep the stretching part 11 in a spiral shape.

[0035] It should be noted that Figure 6 The figure shows the change of the S-shaped line-shaped dynamic submarine cable of the related art before and after being stretched. It can be seen from the figure that when the dynamic submarine cable of the related art is stretched, the S-shaped part will be gradually straightened and the line shape is difficult to maintain. In other words, the radius of the S-shaped part before being stretched is r 1 , the radius of the stretched S-shaped part is r 2 , and r 1 <r 2 .

[0036] Figure 7 What is shown is a schematic diagram of the changes of the new dynamic submarine cable before and after stretching according to an embodiment of the present invention. It can be seen from the figure that after the new dynamic submarine cable is stretched, its line shape still remains spiral under the action of the line shape retainer 2, thereby improving the stability of the line shape of the new dynamic submarine cable according to the embodiment of the present invention.

[0037] Therefore, compared with the S-shaped dynamic submarine cable in the related art, the new dynamic submarine cable in the embodiment of the present invention can achieve a longer stretching effect in a shorter distance. Figure 3 As shown, within the same distance area, the stretchable length of the new dynamic submarine cable of the embodiment of the present invention is much greater than the stretchable length of the dynamic submarine cable of the related art center.

[0038] The buoyancy block 3 is connected to the stretching part 11, and the buoyancy block 3 is used to make the stretching part 11 be located at a preset height under water, and a plurality of buoyancy blocks 3 are arranged at intervals along the extension direction of the spiral axis of the stretching part 11. Optionally, the number of buoyancy blocks 3 is the same as the number of spiral turns of the stretching part 11, and each buoyancy block 3 is correspondingly connected to each turn segment of the stretching part 11, thereby improving the uniformity of the buoyancy of the stretching part 11.

[0039] In some embodiments, Figure 3 As shown, the length of the stretching portion 11 in the extension direction of the spiral axis is defined as l, the number of spiral turns of the stretching portion 11 is defined as n, the spiral radius of the stretching portion 11 is defined as r, and the spiral length of the stretching portion 11 is defined as L, satisfying the relationship: L = [(2·r·π·n) 2 +l 2 ] 0.5 .

[0040] Understandably, Figure 3 The figure shows the length comparison relationship between the S-shaped dynamic submarine cable of the related art and the novel dynamic submarine cable of the embodiment of the present invention within the same distance l. The radius of the dynamic submarine cable of the related art is defined as r', then l = 2r'. That is, within the unit distance l, the maximum elongation of the dynamic submarine cable of the related art is 2πr' = lπ.

[0041] The number n of spiral turns of the tensile portion 11 of the novel dynamic submarine cable according to the embodiment of the present invention is 0.5-2 to avoid excessive torsion that affects the torsion winding process of different layers inside the novel dynamic submarine cable according to the embodiment of the present invention.

[0042] When n=1, r=r', the helical length L of the stretching portion 11 is l(π 2 +1) 0.5 That is, within a unit distance l, the maximum elongation of the new dynamic submarine cable of the embodiment of the present invention is l(π 2 +1) 0.5 The ratio of the maximum elongation of the new dynamic submarine cable of the embodiment of the present invention to the maximum elongation of the dynamic submarine cable of the related art is 1.04.

[0043] When n=2, r=r', the helical length L of the stretching portion 11 is l(4π 2 +1) 0.5 The ratio of the maximum elongation of the novel dynamic submarine cable of the embodiment of the present invention to the maximum elongation of the dynamic submarine cable of the related art is 2.02.

[0044] When n=1, r=2r', the helical length L of the stretching portion 11 is l(4π 2 +1) 0.5 The ratio of the maximum elongation of the novel dynamic submarine cable of the embodiment of the present invention to the maximum elongation of the dynamic submarine cable of the related art is 2.02.

[0045] When n=2, r=2r', the helical length L of the stretching portion 11 is l(16π 2 +1) 0.5 The ratio of the maximum elongation of the novel dynamic submarine cable of the embodiment of the present invention to the maximum elongation of the dynamic submarine cable of the related art is 4.01.

[0046] Therefore, within a unit distance l, the maximum elongation of the new dynamic submarine cable of the embodiment of the present invention is greater than the maximum elongation of the dynamic submarine cable of the related art, thereby being able to achieve a longer stretching within a shorter distance.

[0047] In some embodiments, Figure 1 and Figure 2 As shown, the stretching portion 11 has a connected pressing section 112 and a relaxing section 111 , there are at least two relaxing sections 111 , both ends of the stretching portion 11 in the extension direction of its spiral axis are relaxing sections 111 , and the pressing sections 112 and the relaxing sections 111 are alternately arranged.

[0048] For example, Figure 1As shown, the stretching portion 11 of the novel dynamic submarine cable according to the embodiment of the present invention is composed of a relaxation section 111 + a compression section 112 + a relaxation section 111. The purpose is that when the novel dynamic submarine cable according to the embodiment of the present invention is stretched, the relaxation sections 111 at both ends move first, and then the movement is transmitted to the compression section 112 in the middle to reduce the impact load.

[0049] Furthermore, the tensile stiffness of the relaxation section 111 is smaller than the tensile stiffness of the compression section 112 , so that the relaxation section 111 is stretched first, thereby improving the feasibility of achieving the load reduction effect.

[0050] In some embodiments, Figure 1 and Figure 2 As shown, the number of spiral turns of the relaxation section 111 is smaller than the number of spiral turns of the compression section 112 .

[0051] Optionally, the number of spiral turns of the relaxation section 111 is n1, and 0.5≤n1≤1, and the number of spiral turns of the compression section 112 is n2, and 1≤n2≤2, to further ensure the rationality of the torsion.

[0052] In some embodiments, Figure 2 As shown, the linear retainer 2 includes a spring 21 and a clamp 22. The spiral track of the spring 21 is the same as the spiral track of the stretching part 11, the spring 21 is arranged in parallel with the stretching part 11, and the spring 21 is connected to the stretching part 11 through the clamp 22. It can be understood that the spring 21 and the stretching part 11 together form a parallel double helical structure, and the spring 21 is used to maintain the linear shape of the stretching part 11.

[0053] Optionally, the ratio of the tensile stiffness of the spring 21 to the tensile stiffness of the stretching part 11 is 1.1 to 1.8, so that when the new dynamic submarine cable of the embodiment of the present invention is stretched, the force on the spring 21 is greater than the force on the stretching part 11, thereby improving the service life of the submarine cable body 1. Preferably, the tensile stiffness of the spring 21 is 1.25 times the tensile stiffness of the stretching part 11.

[0054] Alternatively, if Figure 4 As shown, the clamp 22 has a submarine cable through hole 221 and a spring through hole 222. The tensioning part 11 passes through the submarine cable through hole 221, and the outer peripheral wall of the tensioning part 11 fits with the hole wall of the submarine cable through hole 221. The spring 21 passes through the spring through hole 222, and the outer peripheral wall of the spring 21 fits with the hole wall of the spring through hole 222. Thus, the connection between the tensioning part 11 and the spring 21 is achieved through the clamp 22.

[0055] Furthermore, if Figure 2 As shown, there are a plurality of clamps 22 , and the plurality of clamps 22 are arranged at intervals along the spiral direction of the spring 21 , thereby improving the reliability of the connection between the spring 21 and the tension portion 11 .

[0056] The floating wind turbine according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0057] like Figure 5 As shown, the floating wind turbine of the embodiment of the present invention comprises: a wind turbine set 100, a floating body 101, a mooring system 102 and a submarine cable 103. The submarine cable 103 is a new type of dynamic submarine cable in any of the above embodiments.

[0058] The wind turbine 100 floats on the sea surface through a buoy 101, and the buoy 101 is controlled in a designated area through a mooring system 102. The wind turbine 100 is connected to shore equipment through a submarine cable 103 for transmitting power, signals, and the like.

[0059] It can be understood that when the floating body 101 moves, the submarine cable 103 always maintains a spiral shape and is suspended in the water, thereby ensuring the stability of the operation of the floating wind turbine according to the embodiment of the present invention.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A new type of dynamic submarine cable, characterized in that: include: A submarine cable body, a linear retainer and a plurality of buoyancy blocks, wherein the submarine cable body has a stretching portion, the stretching portion is spiral, an angle is formed between the extension direction of the spiral axis of the stretching portion and the vertical direction, the linear retainer is connected to the stretching portion, the linear retainer is used to keep the stretching portion in a spiral shape, the buoyancy block is connected to the stretching portion, the buoyancy block is used to keep the stretching portion at a preset height underwater, and a plurality of the buoyancy blocks are arranged at intervals along the extension direction of the spiral axis of the stretching portion; The stretching portion comprises a compression section and a relaxation section connected to each other, and the tension stiffness of the relaxation section is smaller than the tension stiffness of the compression section; The linear retainer comprises a spring and a clamp, the spiral track of the spring is the same as the spiral track of the stretching part, the spring is arranged in parallel with the stretching part, and the spring is connected to the stretching part through the clamp.

2. The novel dynamic submarine cable according to claim 1 is characterized in that: The length of the stretching portion in the extension direction of the spiral axis is defined as l, the number of spiral turns of the stretching portion is defined as n, the spiral radius of the stretching portion is defined as r, and the spiral length of the stretching portion is defined as L, satisfying the relationship: L=[(2·r·π·n) 2 +l 2 ] 0.5 .

3. The new dynamic submarine cable according to claim 2 is characterized in that: The number of spiral turns of the relaxation section is smaller than the number of spiral turns of the compression section.

4. The novel dynamic submarine cable according to claim 2 is characterized in that: There are at least two relaxation sections, both ends of the stretching portion in the extending direction of the spiral axis are relaxation sections, and the pressing sections and the relaxation sections are alternately arranged.

5. The novel dynamic submarine cable according to claim 1 is characterized in that: The ratio of the tensile stiffness of the spring to the tensile stiffness of the tensile portion is 1.1 to 1.

8.

6. The novel dynamic submarine cable according to claim 1 is characterized in that: The clamp has a submarine cable through hole and a spring through hole, the stretching part passes through the submarine cable through hole, the outer peripheral wall of the stretching part fits with the hole wall of the submarine cable through hole, the spring passes through the spring through hole, and the outer peripheral wall of the spring fits with the hole wall of the spring through hole.

7. The novel dynamic submarine cable according to claim 6 is characterized in that: There are a plurality of the clamps, and the plurality of the clamps are arranged at intervals along the spiral direction of the spring.

8. A floating wind turbine, characterized in that: include: A wind turbine, a buoy, a mooring system and a submarine cable, wherein the submarine cable is a new type of dynamic submarine cable according to any one of claims 1-7.

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