Ice breaking structure device with spiral blade

Abstract

The invention relates to the technical field of offshore wind power generation, in particular to a spiral blade icebreaking structure device. The spiral blade icebreaking structure device comprises a mounting structure which is fixedly connected with an offshore wind turbine foundation; the spiral icebreaking blades are spirally distributed on the outer wall of the mounting structure along the axial direction of the wind turbine foundation, the blade peaks of the spiral icebreaking blades are arranged outwards, the spiral icebreaking blades have screw pitches, and the screw pitches form concave interval spaces. Therefore, the technical problems that an existing ice-resistant structure of the offshore wind turbine foundation is poor in ice-resistant effect, poor in wave dissipation effect, complex and inflexible in structure and prone to ice breaking and accumulation are solved.

Description

Technical Field

[0001] This application relates to the field of offshore wind power technology, and in particular to a spiral blade ice-breaking structure device. Background Technology

[0002] With the rapid development of offshore wind power, wind turbines operating in cold sea areas face severe threats from sea ice. The impact and compression of sea ice on the turbine foundation can damage the foundation, affecting the normal operation of the wind turbine and even causing safety accidents. Therefore, developing effective ice-resistant structures is crucial to ensuring the safety and reliability of offshore wind power facilities.

[0003] Currently, the anti-icing structural design of offshore wind turbine foundations in existing technologies mainly focuses on the following aspects: 1. Anti-ice structures using conical surfaces: These structures guide sea ice to bend and break down, reducing ice load. However, this method is less effective in thick ice conditions, and the conical surface adds additional wave forces, essentially offering no wave-damping effect and failing to actively break up sea ice. 2. Anti-icing structure using a combination of strip-shaped and ring-shaped ice-breaking plates: By installing strip-shaped and ring-shaped ice-breaking plates, the breaking process of sea ice is altered. However, this structure not only increases the complexity, weight, and volume of the structure, making it inconvenient and inflexible to use, but also easily leads to the accumulation of ice fragments. 3. Employing wave-damping hole design: Wave loads are reduced by creating wave-damping holes in the structure. However, this structure has limited direct effect on ice loads and its anti-icing effect is poor. Summary of the Invention

[0004] The purpose of this application is to provide a spiral blade ice-breaking structure device to solve the technical problems of poor anti-icing effect, poor wave dissipation effect, complex and inflexible structure, and easy accumulation of broken ice in the existing anti-icing structure of offshore wind turbine foundation.

[0005] This application provides a spiral blade ice-breaking structure device, comprising: The installation structure is fixedly connected to the offshore wind turbine foundation; and Spiral ice-breaking blades are spirally distributed along the axial direction of the offshore wind turbine foundation on the outer wall of the mounting structure, with the blade peaks facing outwards and the spiral ice-breaking blades having a pitch that forms a concave interval space.

[0006] Furthermore, the installation structure is configured as a cylindrical structure, including an inner cylinder and an outer cylinder that are sleeved and connected together. The inner cylinder is sleeved and fixedly connected to the outer wall of the offshore wind turbine foundation, and the spiral ice-breaking blades are spirally distributed and fixedly connected to the circumferential outer wall of the outer cylinder.

[0007] Furthermore, there is an annular cavity between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and a partition is provided in the annular cavity that is fixedly connected to the outer wall of the inner cylinder and the inner wall of the outer cylinder or is detachably connected by assembly.

[0008] Furthermore, the partition is configured as a transverse partition arranged in the horizontal direction, and the transverse partition has an annular structure. The inner annular side of the transverse partition is fixedly connected to the outer wall of the inner cylinder, and the outer annular side of the transverse partition is fixedly connected to the inner wall of the outer cylinder; or The partition is configured as a longitudinal partition arranged along the longitudinal direction, and the longitudinal partition is an arc-shaped strip structure. The inner arc of the longitudinal partition is fixedly connected to the outer wall of the inner cylinder, and the outer arc of the longitudinal partition is fixedly connected to the inner wall of the outer cylinder.

[0009] Furthermore, at least two transverse partitions are evenly spaced along the axial direction of the cylindrical structure; or At least four longitudinal partitions are evenly spaced along the circumference of the cylindrical structure.

[0010] Furthermore, a rotator is provided in the annular cavity between the outer wall of the inner cylinder and the inner wall of the outer cylinder, either fixedly connected or detachably assembled, and the rotator drives the outer cylinder to rotate relative to the inner cylinder.

[0011] Furthermore, the rotator adopts a sliding bearing structure, and the sliding bearing structure contains spherical steel balls.

[0012] Furthermore, the control motor connected to the rotator drive adjusts its rotation speed by receiving sea ice thickness monitored by the platform. When the sea ice thickness is less than 10cm, the rotator is not turned on or a low-speed rotation mode is selected. When the sea ice thickness is between 10 and 20cm, the rotator selects a medium-speed rotation mode. When the sea ice thickness is more than 20cm, the rotator selects a high-speed rotation mode.

[0013] Furthermore, the annular cavity between the inner cylinder and the outer cylinder is filled with damping material; and / or The upper and / or lower ends of the inner cylinder are provided with slots or lugs, which are fixed to the offshore wind turbine foundation by means of a cage connection.

[0014] Furthermore, the pitch of the spiral icebreaking blade is not less than the minimum sea ice thickness during the ice age in the region; and / or The inclination angle of the spiral ice-breaking blade is between 30° and 60°; and / or The thickness of the spiral ice-breaking blade is not less than 10cm, and at the same time, it is not less than the maximum ice thickness.

[0015] Compared with the prior art, the spiral ice-breaking structure device provided in this application has a mounting structure that is fixedly connected to the offshore wind turbine foundation. The spiral ice-breaking blades are spirally distributed along the axial direction of the offshore wind turbine foundation. The spiral ice-breaking blades are mounted on the outer wall of the mounting structure, and the blade tip of the spiral ice-breaking blades is set outward away from the mounting structure. The spiral ice-breaking blades have a pitch that forms a concave interval space.

[0016] With this design, firstly, the spiral ice-breaking blade provided in this application is a spiral shape extending upwards along the axial direction of the offshore wind turbine foundation. It has a sharp cutting surface, a sharp cutting edge, and a certain thickness. Its cutting edge is set outwards, giving it a sharp cutting ability. It can effectively cut sea ice, destroy the impact and compression force of sea ice, reduce the impact of ice load on the wind turbine foundation, effectively protect the structure of the offshore wind turbine foundation from damage by sea ice, thereby ensuring the normal operation of the wind turbine, reducing the impact on the operating efficiency of the wind turbine, and thus ensuring the safety and reliability of offshore wind power facilities.

[0017] Secondly, compared with the existing anti-ice structure with a conical surface, the spiral ice-breaking blade provided in this application has a pitch, that is, there is a concave space between the structures of the spiral ice-breaking blade, and there is a cross-sectional interval, which can play a good role in reducing wave force and achieving a wave-damping effect.

[0018] Thirdly, compared with the existing anti-ice structure combining strip ice-breaking plates and ring ice-breaking plates, the spiral blade ice-breaking structure device provided in this application has a simpler, lighter and more flexible structure. Furthermore, due to the spiral structure of the spiral ice-breaking blade with its upward spiral inclination and smooth blade surface, it is less prone to the formation of ice fragments, which facilitates later maintenance and cleaning and extends the service life of the structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram showing the spiral blade ice-breaking structure device provided in this application, installed on an offshore wind turbine foundation, in its operational state. Figure 2 This is a cross-sectional view of the spiral blade ice-breaking structure device provided in the embodiment of this application.

[0021] Figure label: 100-Helical Blade Ice-Breaking Structure Device; 10- Spiral ice-breaking blade; 11-Blade Peak; 12-Concave interval space; 20-Cylindrical structure; 21-Inner cylinder; 22-Outer cylinder; 23-Annular cavity; 24 - Horizontal partition; 200 - Offshore wind turbine foundation. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] like Figure 1 and Figure 2 As shown in the figure, this application provides a spiral blade ice-breaking structure device 100, which is applied to an offshore wind turbine foundation 200.

[0030] The spiral ice-breaking structure device 100 includes an installation structure fixedly connected to the offshore wind turbine foundation 200; and a spiral ice-breaking blade 10 spirally distributed on the outer wall of the installation structure along the axial direction of the offshore wind turbine foundation 200, with the blade tip 11 of the spiral ice-breaking blade 10 facing outward, i.e., in a direction away from the installation structure, and the spiral ice-breaking blade 10 having a pitch that forms a concave interval space 12.

[0031] Compared with the prior art, the spiral ice-breaking structure device 100 provided in this application embodiment, through an installation structure fixedly connected to the offshore wind turbine foundation 200, installs spiral ice-breaking blades 10 spirally distributed along the axial direction of the offshore wind turbine foundation 200, and the spiral ice-breaking blades 10 are installed on the outer wall of the installation structure, with the cutting edge 11 of the spiral ice-breaking blades 10 facing outward away from the installation structure, and the spiral ice-breaking blades 10 have a pitch that forms a concave interval space, i.e. Figure 1 The concave space 12 shown.

[0032] With this configuration, firstly, the spiral ice-breaking blade 10 provided in this embodiment is a spiral shape extending upward along the axial direction of the offshore wind turbine foundation 200. It has a sharp cutting surface, a sharp cutting edge, and a certain thickness. Its cutting peak 11 is set outward, giving it a sharp cutting ability. It can effectively cut sea ice, destroy the impact and extrusion force of sea ice, reduce the impact of ice load on the wind turbine foundation, and effectively protect the structure of the offshore wind turbine foundation 200 from damage by sea ice. This ensures the normal operation of the wind turbine, reduces the impact on the operating efficiency of the wind turbine, and thus ensures the safety and reliability of the offshore wind power facilities.

[0033] Secondly, compared with the existing anti-ice structure with a conical surface, the spiral ice-breaking blade 10 provided in this application embodiment has a pitch, that is, there is a concave interval space (i.e., concave interval space 12) between the structures of the spiral ice-breaking blade 10, and there is a cross-sectional interval, which can play a good role in reducing wave force and achieving a wave-damping effect.

[0034] Thirdly, the spiral blade ice-breaking structure device 100 provided in this application embodiment is simpler, lighter and more flexible in structure setting compared with the existing anti-ice structure structure that combines strip ice-breaking plates and ring ice-breaking plates. Furthermore, due to the spiral structure characteristics of the spiral ice-breaking blade 10 with its spiral inclination upward and its smooth blade surface, it is not easy for ice fragments to accumulate, which facilitates later maintenance and cleaning and extends the service life of the structure.

[0035] Regarding the aforementioned installation structure, a specific embodiment is as follows: Figure 1 and Figure 2 As shown, the installation structure can be specifically configured to have a cylindrical structure 20, which is preferably a cylindrical structure, but can also be a structure of other shapes.

[0036] The cylindrical structure 20 may specifically include an inner cylinder 21 and an outer cylinder 22 that are nested together. Both the inner cylinder 21 and the outer cylinder 22 have a certain thickness and strength. The spiral ice-breaking blade 10 is spirally distributed and fixedly connected to the circumferential outer wall of the outer cylinder 22. The inner cylinder 21 is nested and fixedly connected to the outer wall of the offshore wind turbine foundation 200. This nesting connection method is simple, convenient, and highly reliable.

[0037] Preferably, the upper or lower end of the inner cylinder 21 can be provided with a slot or a lug, so that the inner cylinder 21 is fixed to the offshore wind turbine foundation 200 by means of a cage connection. This fixing method can simplify the installation process, reduce construction costs, greatly increase the convenience of installation, and improve construction efficiency.

[0038] In a preferred embodiment, an annular cavity 23 is provided between the outer wall of the inner cylinder 21 and the inner wall of the outer cylinder 22, and a partition connected to the outer wall of the inner cylinder 21 and the inner wall of the outer cylinder 22 is provided in the annular cavity 23. The partition may be a steel reinforcement structure.

[0039] On the one hand, this structural design allows for a fixed connection between the inner cylinder 21 and the outer cylinder 22, thereby effectively and statically fixing the spiral ice-breaking blade 10. When the sea ice thickness is less than 10cm, this statically fixed spiral ice-breaking blade 10 can meet the ice-resistant requirements. On the other hand, the internal structure is designed as a cavity structure, which can reduce the weight of the installation structure and facilitate the requirement for lightweight structure.

[0040] Regarding the aforementioned partition arrangement, one optional embodiment is as follows: Figure 2 As shown, the partition can specifically be configured as a transverse partition 24 arranged in the horizontal direction, and the transverse partition 24 can be an annular structure. The inner side of the annular partition 24 is fixedly connected to the outer wall of the aforementioned inner cylinder 21, and the outer side of the annular partition 24 is fixedly connected to the inner wall of the aforementioned outer cylinder 22. Preferably, at least two transverse partitions 24 are evenly spaced along the axial direction of the cylindrical structure 20 to ensure the reliability of the partition connection and fixation.

[0041] Another optional embodiment is that the partition can be a longitudinal partition arranged along the longitudinal direction, and the longitudinal partition can be an arc-shaped strip structure. The inner arc of the longitudinal partition is fixedly connected to the outer wall of the inner cylinder 21, and the outer arc of the longitudinal partition is fixedly connected to the inner wall of the outer cylinder 22. Preferably, at least four longitudinal partitions are evenly arranged at intervals along the circumference of the cylindrical structure 20 to ensure the reliability of the partition connection and fixation.

[0042] To achieve better icebreaking effect and realize active icebreaking, another preferred embodiment is that there is also an annular cavity 23 between the outer wall of the inner cylinder 21 and the inner wall of the outer cylinder 22, and a rotator can be connected and installed in the annular cavity 23. The rotator drives the outer cylinder 22 to rotate relative to the inner cylinder 21. The control motor connected to the rotator drives its rotation and drives the spiral icebreaking blade 10 to rotate, so that the spiral icebreaking blade 10 is in a rotating state, thereby achieving a better icebreaking effect. For sea areas with heavy ice conditions, this rotating spiral icebreaking blade 10 is preferred.

[0043] In one specific embodiment, the control motor connected to the rotator adjusts its rotation speed based on the sea ice thickness monitored by the receiving platform. When the sea ice thickness is less than 10 cm, the rotator can be turned off or selected in a low-speed rotation mode, or the aforementioned partition structure can be switched on; when the sea ice thickness is between 10 and 20 cm, the rotator can select a medium-speed rotation mode; when the sea ice thickness is greater than 20 cm, the rotator can select a high-speed rotation mode.

[0044] Another specific embodiment is that the rotator can adopt a sliding bearing structure, which offers high rotational reliability. Preferably, this sliding bearing structure incorporates spherical steel balls to improve vibration damping, buffering, and noise reduction.

[0045] In a preferred embodiment, the aforementioned partition can be welded and fixedly connected to the inner cylinder 21 and the outer cylinder 22, or assembled and detachably connected and fixed. The aforementioned rotator can also be welded and fixedly connected to the inner cylinder 21 and the outer cylinder 22, or assembled and detachably connected and fixed.

[0046] Preferably, a modular, detachable connection is adopted, which facilitates disassembly and replacement, and also allows for easy switching between two modes (static mode and rotatable mode). The aforementioned partition structure and the aforementioned rotator structure can be used interchangeably. The aforementioned partition structure allows the spiral icebreaker 10 to be in a stationary state, while the rotator structure allows the spiral icebreaker 10 to be in a rotating state. In sea areas with less severe ice conditions, specifically when the sea ice thickness is less than 10cm, the static mode spiral icebreaker 10 can be used; in sea areas with more severe ice conditions, when the sea ice thickness is greater than or equal to 10cm, the rotatable mode spiral icebreaker 10 can be installed.

[0047] In a more preferred embodiment, the annular cavity 23 between the inner cylinder 21 and the outer cylinder 22 may be filled with damping material. Filling with damping material can effectively reduce vibration during icebreaking and improve the stability and durability of the structure.

[0048] An alternative embodiment is, as follows: Figure 1 and Figure 2 As shown, the spiral ice-breaking blade 10 provided in this embodiment can be connected to the outer cylinder 22 by welding or by a modular, detachable connection. A modular, detachable connection is preferred, as this facilitates replacement of the spiral ice-breaking blade 10, allowing for the use of different sizes of spiral ice-breaking blades 10 depending on the ice conditions.

[0049] Regarding the structural parameters of the spiral icebreaker 10, the pitch of the spiral icebreaker 10 can be no less than the minimum sea ice thickness during the ice period in the sea area to ensure the wave-damping effect; the inclination angle of the spiral icebreaker 10 is preferably between 30 and 60° to ensure its ice-cutting effect; the thickness of the spiral icebreaker 10 can be no less than 10 cm, and at the same time no less than the maximum ice thickness, to ensure its ice-cutting effect.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A spiral blade ice-breaking structure device, characterized in that, include: The installation structure is fixedly connected to the offshore wind turbine foundation; and Spiral ice-breaking blades are spirally distributed along the axial direction of the offshore wind turbine foundation on the outer wall of the mounting structure, with the blade peaks facing outwards and the spiral ice-breaking blades having a pitch that forms a concave interval space.

2. The spiral blade ice-breaking structure device according to claim 1, characterized in that, The installation structure is configured as a cylindrical structure, including an inner cylinder and an outer cylinder that are sleeved and connected together. The inner cylinder is sleeved and fixedly connected to the outer wall of the offshore wind turbine foundation, and the spiral ice-breaking blades are spirally distributed and fixedly connected to the circumferential outer wall of the outer cylinder.

3. The spiral blade ice-breaking structure device according to claim 2, characterized in that, There is an annular cavity between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and a partition is provided in the annular cavity that is fixedly connected to the outer wall of the inner cylinder and the inner wall of the outer cylinder or is detachably connected by assembly.

4. The spiral blade ice-breaking structure device according to claim 3, characterized in that, The partition is configured as a transverse partition arranged in the horizontal direction, and the transverse partition is an annular structure. The inner side of the annular partition is fixedly connected to the outer wall of the inner cylinder, and the outer side of the annular partition is fixedly connected to the inner wall of the outer cylinder; or The partition is configured as a longitudinal partition arranged along the longitudinal direction, and the longitudinal partition is an arc-shaped strip structure. The inner arc of the longitudinal partition is fixedly connected to the outer wall of the inner cylinder, and the outer arc of the longitudinal partition is fixedly connected to the inner wall of the outer cylinder.

5. The spiral blade ice-breaking structure device according to claim 4, characterized in that, At least two transverse partitions are evenly spaced along the axial direction of the cylindrical structure; or At least four longitudinal partitions are evenly spaced along the circumference of the cylindrical structure.

6. The spiral blade ice-breaking structure device according to claim 2, characterized in that, A rotator is fixedly connected or detachably assembled within the annular cavity between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and the rotator drives the outer cylinder to rotate relative to the inner cylinder.

7. The spiral blade ice-breaking structure device according to claim 6, characterized in that, The rotator adopts a sliding bearing structure, and the sliding bearing structure contains spherical steel balls.

8. The spiral blade ice-breaking structure device according to claim 6, characterized in that, The control motor connected to the rotator drive adjusts its rotation speed by receiving sea ice thickness monitored by the platform. When the sea ice thickness is less than 10cm, the rotator is not turned on or a low-speed rotation mode is selected. When the sea ice thickness is between 10 and 20cm, the rotator selects a medium-speed rotation mode. When the sea ice thickness is more than 20cm, the rotator selects a high-speed rotation mode.

9. The spiral blade ice-breaking structure device according to any one of claims 3 to 8, characterized in that, The annular cavity between the inner cylinder and the outer cylinder is filled with damping material; and / or The upper and / or lower ends of the inner cylinder are provided with slots or lugs, which are fixed to the offshore wind turbine foundation by means of a cage connection.

10. The spiral blade ice-breaking structure device according to claim 1 or 2, characterized in that, The pitch of the spiral icebreaking blade is not less than the minimum sea ice thickness during the ice age in the area; and / or The inclination angle of the spiral ice-breaking blade is between 30° and 60°; and / or The thickness of the spiral ice-breaking blade is not less than 10cm, and at the same time, it is not less than the maximum ice thickness.

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