Wind generating set and deicing method thereof

Abstract

The invention discloses a wind generating set and a deicing method thereof, and relates to the technical field of wind power generation, the wind generating set comprises a main body, a power generation device, a blade assembly and a vibration device, the main body comprises a mounting end and a connecting end, and the mounting end is mounted on the ground; the power generation device is mounted at the connecting end and comprises a generator and a rotating shaft which are connected; the blade assembly comprises a hub and a plurality of blades arranged on the periphery of the hub at intervals, the hub is rotationally connected with the rotating shaft, the blades rotate to drive the hub to rotate, and the hub drives the rotating shaft to rotate so that the generator can generate electricity; the vibration device is installed at the connecting end and abuts against the side, facing the vibration device, of the hub. The condensed water is removed through vibration, compared with an electric heating device covering the blade in the prior art, on one hand, the additional load of the blade is reduced, the pneumatic performance of the blade is improved, on the other hand, deicing is conducted in a physical mode, power consumption is basically avoided, and cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power generator set and a deicing method thereof. Background Art

[0002] As a renewable energy source, wind power has been widely used and rapidly developed worldwide. Wind turbines convert wind energy into rotational kinetic energy through their blades. This mechanical energy is then converted into electrical energy by the rotating shaft of the generator. Therefore, blades play a crucial role in wind turbines. However, blades of wind turbines deployed at high latitudes or altitudes are prone to ice formation, which can affect their aerodynamic performance and reduce power generation efficiency.

[0003] Existing wind turbines typically de-ice their blades through heating. This involves integrating heating devices (such as heating wires, carbon fiber heating sheets, or PTC elements) inside or on the blades. Upon detecting ice formation or the temperature dropping below freezing, the system activates the heating devices to locally heat ice-prone areas, such as the leading edge of the blades, melting or peeling off the ice. However, de-icing through heating consumes significant amounts of electricity and is costly. Summary of the Invention

[0004] The main purpose of the present invention is to provide a wind turbine generator set and a deicing method thereof, aiming to solve the problem of large amount of electricity consumption and high cost in the prior art of deicing by heating.

[0005] To achieve the above-mentioned purpose, the wind turbine generator set proposed by the present invention comprises: A main body, the main body comprising a mounting end and a connecting end, the mounting end being mounted on the ground; A power generation device, the power generation device is installed at the connection end, the power generation device includes a generator and a rotating shaft, and the generator is connected to the rotating shaft; a blade assembly, the blade assembly comprising a hub and a plurality of blades spaced apart around the hub, the hub being rotatably connected to the shaft, the blades rotating to drive the hub to rotate, and the hub driving the shaft to rotate so that the generator generates electricity; a vibration device, the vibration device being mounted on the connection end and abutting against a side of the hub facing the vibration device, the vibration device being configured to drive the hub to vibrate along the axial direction of the hub when the hub rotates, thereby driving the blades to vibrate; The vibration device is provided with a protrusion on a side facing the wheel hub, and the wheel hub is provided with a convex block for abutting against the protrusion on a side facing the vibration device, and when the wheel hub rotates, the convex block abuts against the protrusion to make the wheel hub vibrate along the axial direction of the wheel hub; The vibration device includes a vibration driving member and a mounting shell, the protrusion is arranged on the mounting shell, and the vibration driving member can drive the mounting shell to move toward or away from the wheel hub to correspondingly move the mounting shell until the protrusion abuts against the bump, or move the mounting shell until the protrusion is separated from the bump.

[0006] In one embodiment, the mounting shell is arranged in an annular shape, the hub is arranged in a circular shape, the mounting shell is arranged on the outer periphery of the rotating shaft, and the vibration driving member is arranged to avoid the rotating shaft, the number of the protrusions is multiple, and the multiple protrusions are arranged at intervals along the circumference of the mounting shell, and the number of the protrusions is multiple, and the multiple protrusions are arranged at intervals along the circumference of the hub.

[0007] In one embodiment, a temperature sensor is provided on the blade assembly, and the wind turbine generator set further includes a controller. The temperature sensor and the vibration drive member are electrically connected to the controller. The temperature sensor is used to detect the temperature data of the blade and send it to the controller. The controller is used to control the vibration drive member to push the mounting shell toward the hub when the temperature data is lower than a preset temperature value.

[0008] In one embodiment, the rotating shaft is provided with a plurality of sliding grooves along its circumference, the sliding grooves extending along the extension direction of the rotating shaft, and the wheel hub is provided with a slider extending into and slidingly engaging with the sliding grooves, the slider being configured to abut against the sidewalls of the sliding grooves to limit the wheel hub and the rotating shaft along their circumferential directions; An elastic reset member is provided in the rotating shaft, one end of the elastic reset member is connected to the rotating shaft, and the other end is connected to the wheel hub. The elastic reset member is used to elastically deform when the protrusion abuts the bump, and reset the wheel hub through elastic restoring force when the protrusion and the bump are misaligned.

[0009] In one embodiment, the protrusions are hemispherical protrusions, and the bumps are hemispherical bumps.

[0010] The present invention further provides a deicing method for a wind turbine generator set, which is applied to the wind turbine generator set. The wind turbine generator set comprises: A main body, the main body comprising a mounting end and a connecting end, the mounting end being mounted on the ground; A power generation device, the power generation device is installed at the connection end, the power generation device includes a generator and a rotating shaft, and the generator is connected to the rotating shaft; a blade assembly, the blade assembly comprising a hub and a plurality of blades, the hub being rotatably connected to the rotating shaft; a vibration device, the vibration device being mounted on the connection end and abutting against a side of the wheel hub facing the vibration device; A temperature sensor and a controller, wherein the temperature sensor and the vibration device are both electrically connected to the controller, and the deicing method of the wind turbine generator set comprises the following steps: The temperature sensor detects temperature data of the blade surface and sends the temperature data to the controller; The controller compares the temperature data with a preset temperature value; If the temperature data is lower than the preset temperature value, the controller controls the vibration device to drive the hub to vibrate along the axial direction of the hub, so as to drive the blades to vibrate, so as to shake off the condensed water or ice layer on the blades.

[0011] In one embodiment, a protrusion is provided on a side of the vibration device facing the hub, and a bump is provided on a side of the hub facing the vibration device for abutting against the protrusion; the vibration device includes a vibration driver and a mounting shell, the protrusion is provided on the mounting shell, and the vibration driver is connected to the mounting shell and electrically connected to the controller; The step of the controller controlling the vibration device to drive the hub to vibrate along the axial direction of the hub includes: The controller controls the vibration driving member to start, driving the mounting shell to move toward the wheel hub until the protrusion and the bump are staggered and abut against each other; The blades rotate and drive the hub to rotate, so that the protrusion on the hub slides with the protrusion on the mounting shell, and when the protrusion is facing the protrusion, the hub is pushed up in the direction away from the mounting shell. When the protrusion is misaligned with the protrusion, the hub is reset toward the mounting shell, so that the hub vibrates along its axial direction.

[0012] In one embodiment, the protrusion is a hemispherical protrusion, the bump is a hemispherical bump, the number of the preset temperature values ​​is multiple, and each preset temperature value corresponds to a preset distance; The step of the controller comparing the temperature data with a preset temperature value includes: The controller compares the temperature data with each of the preset temperature values; If the temperature data is between any two adjacent preset temperature values, the preset distance corresponding to the larger preset temperature value is taken as the current preset distance; The controller controls the vibration driving member to start, and drives the mounting shell to move toward the hub until the protrusion and the bump are staggered and abut against each other, comprising: The controller controls the vibration driving member to start, driving the mounting shell to move the current preset distance toward the wheel hub, and causing the protrusion to be staggered and abutted against the bump.

[0013] The technical solution of the present invention is to install a vibration device at the connection end of the main body, which drives the hub to vibrate axially. The hub is connected to the end of each blade, so that the axial vibration of the hub drives the blades to vibrate, so that condensed water on the blades is shaken off, thereby preventing the condensed water from adhering to the blades and forming ice, maintaining the optimal aerodynamic performance of the blades and the power generation efficiency of the wind turbine. Compared with the electric heating device covering the blades in the prior art, the present application removes condensed water through vibration. On the one hand, it reduces the additional load on the blades and improves the aerodynamic performance of the blades. On the other hand, it uses physical de-icing methods, which consumes almost no electricity and significantly reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0015] Figure 1 A schematic structural diagram of a wind turbine generator set provided in one embodiment of the present invention; Figure 2 A schematic diagram of a portion of the structure of a wind turbine generator set provided by one embodiment of the present invention; Figure 3 A schematic structural diagram of a hub and a rotating shaft of a wind turbine generator set provided by one embodiment of the present invention; Figure 4 A schematic cross-sectional view of a hub and a rotating shaft of a wind turbine generator set provided in one embodiment of the present invention; Figure 5 This is a flowchart of a de-icing method for a wind turbine generator set provided by one embodiment of the present invention.

[0016] Description of Figure Numbers: 100. Wind turbine generator set; 1. Main body; 11. Mounting end; 12. Connecting end; 2. Power generation device; 21. Generator; 22. Rotating shaft; 221. Slide groove; 222. Elastic return member; 3. Blade assembly; 31. Hub; 311. Bump; 312. Slider; 32. Blade; 4. Vibration device; 41. Protrusion; 42. Vibration drive member; 43. Mounting shell.

[0017] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiment is only a partial embodiment of the present invention, not a complete embodiment. All other embodiments derived by ordinary technicians in this field based on the embodiments of the present invention without inventive work shall fall within the scope of protection of the present invention.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various shell parts in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0020] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Existing wind turbines typically de-ice their blades through heating. This involves integrating heating devices (such as heating wires, carbon fiber heating sheets, or PTC elements) inside or on the blades. Upon detecting ice formation or the temperature dropping below freezing, the system activates the heating devices to locally heat ice-prone areas, such as the leading edge of the blades, melting or peeling off the ice. However, de-icing through heating consumes significant amounts of electricity and is costly.

[0022] To solve the above problems, the present invention proposes a wind turbine generator set 100 .

[0023] Please combine Figure 1 and Figure 2The wind turbine generator set 100 of this embodiment includes a main body 1, a power generation device 2, a blade assembly 3, and a vibration device 4. The main body 1 includes a mounting end and a connecting end 12, and the mounting end is installed on the ground; the power generation device 2 is installed at the connecting end 12, the power generation device 2 includes a generator 21 and a rotating shaft 22, and the generator 21 is connected to the rotating shaft 22; the blade assembly 3 includes a hub 31 and a plurality of blades 32 arranged at intervals on the outer periphery of the hub 31, the hub 31 is rotatably connected to the rotating shaft 22, the rotation of the blades 32 drives the hub 31 to rotate, and the hub 31 drives the rotating shaft 22 to rotate so that the generator 21 generates electricity; the vibration device 4 is installed at the connecting end 12, and the vibration device 4 abuts against the side of the hub 31 facing the vibration device 4. The vibration device 4 is used to drive the hub 31 to vibrate along the axial direction of the hub 31 when the hub 31 rotates, so as to drive the blades 32 to vibrate.

[0024] The technical solution of the present invention is to install a vibration device 4 at the connection end 12 of the main body 1, and the vibration device 4 drives the hub 31 to vibrate axially. The hub 31 is connected to the end of each blade 32, so that the axial vibration of the hub 31 drives the blades 32 to vibrate, so that the condensed water on the blades 32 is shaken off, thereby preventing the condensed water from adhering to the blades 32 and forming ice, maintaining the optimal aerodynamic performance of the blades 32 and the power generation efficiency of the wind turbine 100. Compared with the electric heating device covering the blades 32 in the prior art, the present application removes condensed water through vibration. On the one hand, it reduces the additional weight of the blades 32 and improves the aerodynamic performance of the blades 32. On the other hand, it uses physical de-icing, consumes almost no electricity, and significantly reduces costs.

[0025] In one embodiment, a protrusion 41 is provided on the side of the vibration device 4 facing the hub 31, and a bump 311 for abutting against the protrusion 41 is provided on the side of the hub 31 facing the vibration device 4. When the hub 31 rotates, the bump 311 abuts against the protrusion 41 to make the hub 31 vibrate along the axial direction of the hub 31.

[0026] The rotational inertia of the hub 31 is utilized to make the bump 311 and the protrusion 41 intermittently contact during the rotation process, realizing mechanical excitation without electric drive conditions, effectively triggering axial micro-vibration of the hub 31, realizing a low-energy or even zero-energy de-icing solution, and further reducing power consumption; at the same time, the cooperation between the protrusion 41 and the bump 311 is a purely mechanical structure with few parts, simple structure, high stability and reliability.

[0027] The direction in which the hub 31 is driven to vibrate by the protrusion 311 and the bump 41 is the axial direction of the hub 31, which is perpendicular to the radial shear stress on which the blade 32 is mainly subjected, and has little effect on the radial shear stress of the blade 32. In one embodiment, the vibration device 4 includes a vibration driving member 42 and a mounting shell 43, and the protrusion 41 is set on the mounting shell 43. The vibration driving member 42 can drive the mounting shell 43 to move toward or away from the hub 31 to correspondingly move the mounting shell 43 to the protrusion 41 abutting against the bump 311, or move the mounting shell 43 to the protrusion 41 separating from the bump 311.

[0028] The vibration drive component 42 controls the position of the mounting shell 43 so that the protrusion 41 and the bump 311 are in contact when needed and separated when not needed, thereby avoiding unnecessary structural vibration, improving the stability of the system operation, avoiding wear caused by long-term vibration of the hub 31, and extending the service life of the hub 31, the protrusion 41 and the bump 311.

[0029] The present invention will only bring the protrusion 41 and the bump 311 into contact when the surface temperature of the blade 32 drops to a level where ice may form. Therefore, the hub 31 only needs to be de-iced at a specific time, and axial vibration does not always exist. As common sense for those skilled in the art, the wind turbine 21 group will take into account the impact of various extreme environments at the beginning of its design, so the performance of its blades 32 and hub 31 is redundant. The vibration of the hub 31 caused by the abutment of the protrusion 41 and the bump 311 of the present application has a much smaller impact on the hub 31 and the blades 32 than that of strong or even extreme wind. In addition, the blades 32 and the hub 31 have redundant performance and will not have too much impact on the blades 32. In addition, the protrusion 41 and the bump 311 will only abut and vibrate at a specific time, so there will be no problem of huge impact on the load of the entire wind turbine 21 group.

[0030] The present invention can shake off condensed water with only slight vibrations by using the relatively small protrusions 41 and bumps 311, without significantly affecting the overall load of the wind turbine 21. Therefore, the examiner can regard the de-icing device of this application as a structure for preventing icing, rather than a de-icing structure that can handle any environment and any thickness of ice. The present invention is applied to environments with relatively less extreme temperatures, such as environments where the blades 32 only produce a thin layer of ice. Condensed water and thin ice layers can be shaken off without heating, saving electricity. It can also be combined with a structure that de-ices by heating to shake off early ice layers and reduce the thickness of the ice layer, thereby saving energy consumption of the heating device. Therefore, no matter which scenario it is applied to, it can significantly reduce electricity consumption.

[0031] In one embodiment, the mounting shell 43 is arranged in an annular shape, the hub 31 is arranged in a circular shape, the mounting shell 43 is sleeved on the outer periphery of the rotating shaft 22, and the vibration driving member 42 is arranged to avoid the rotating shaft 22. There are multiple protrusions 41, and the multiple protrusions 41 are arranged at intervals along the circumference of the mounting shell 43. There are multiple protrusions 311, and the multiple protrusions 311 are arranged at intervals along the circumference of the hub 31.

[0032] The vibration driver 42 is positioned outside the rotating shaft 22 and does not directly contact it, thus preventing interference with the generator shaft. Multiple protrusions 41 and multiple bumps 311 form a multi-point contact impact system, creating continuous or periodic vibration input during the rotation of the hub 31, enhancing the de-icing effect. Multi-point contact between the protrusions 41 and bumps 311 ensures that the vibration wave covers the entire hub 31 and each blade 32, avoiding imbalances caused by incomplete local de-icing. The protrusions 41 and bumps 311 are arranged circumferentially. During rotation, the protrusions 41 sequentially contact different bumps 311. By designing protrusions 41 and bumps 311 of varying heights and spacing, differentiated vibration rhythms and frequency control can be achieved.

[0033] Specifically, the spacing, height, and contact angle of the protrusions 41 can be designed to vary based on the parameters of the blades 32 of different wind turbine generators 100. This allows for directional control of the vibration amplitude and frequency to accommodate varying blade 32 lengths or structural stiffness. For example, when blades 32 are longer or when the ice layer is thicker, a stronger contact force can be designed to enhance the vibration energy.

[0034] For example, in one embodiment, the heights of the protrusions 41 are uniform, and the heights of the protrusions 311 increase sequentially from one of the protrusions 311 along the circumference of the hub 31, or there are multiple groups of protrusions 311, and each group of protrusions 311 includes multiple protrusions 311 with different heights, and the protrusions 311 have multiple height sizes, thereby regularly inducing impact vibrations of different frequencies and amplitudes, which helps to clean the condensed water and thin ice layer on the surface of the blade 32.

[0035] In one embodiment, a temperature sensor (not shown) is provided on the blade assembly 3, and the wind turbine generator set 100 also includes a controller (not shown). The temperature sensor and the vibration drive member 42 are both electrically connected to the controller. The temperature sensor is used to detect the temperature data of the blade 32 and send it to the controller. The controller is used to control the vibration drive member 42 to push the mounting shell 43 toward the hub 31 when the temperature data is lower than a preset temperature value.

[0036] By monitoring the surface temperature of the blades 32 in real time through the temperature sensor, it can accurately determine whether there is a risk of icing; the controller automatically determines whether the temperature is lower than the preset value and accurately triggers the vibration de-icing action; the vibration de-icing can be started at the early stage of the condensed water freezing to prevent the ice layer from accumulating and forming thick ice; at the same time, the controller controls the mounting shell 43 to move toward the hub 31 to vibrate the hub 31 only when it is about to freeze, avoiding ineffective vibration, extending the life of the vibration driver and the mechanical contact structure, and avoiding energy waste and structural wear when there is no risk of icing.

[0037] Please combine Figure 3 and Figure 4In one embodiment, a plurality of sliding grooves 221 are opened on the rotating shaft 22 along its circumference, and the sliding grooves 221 extend along the extension direction of the rotating shaft 22. A slider 312 is provided on the wheel hub 31, which extends into the sliding groove 221 and slides in contact with the sliding groove 221. The slider 312 is used to abut against the side wall of the sliding groove 221 to limit the wheel hub 31 and the rotating shaft 22 along their circumference; an elastic reset member 222 is provided in the rotating shaft 22, one end of the elastic reset member 222 is connected to the rotating shaft 22, and the other end is connected to the wheel hub 31. The elastic reset member 222 is used to elastically deform when the protrusion 41 abuts against the convex block 311, and reset the wheel hub 31 by elastic restoring force when the protrusion 41 and the convex block 311 are misaligned.

[0038] The slider 312-slot 221 structure ensures that the hub 31 can only vibrate axially in the direction of the rotating shaft 22, so that the protrusion 41 and the bump 311 can always be set directly opposite each other; at the same time, the slider 312 abuts against the side wall of the slot 221 to prevent the hub 31 from causing rotational offset or torsional deformation when the protrusion 41 and the bump 311 contact, thereby ensuring the stability of the hub 31; if the hub 31 itself bears the reset function (the hub 31 elastically rebounds), it may cause material fatigue, structural loosening or even cracking, resulting in damage to the hub 31; by independently setting the elastic reset part 222 to undertake the reset function, the repeated vibration load on the hub 31 structure is effectively alleviated, thereby extending the life of the system.

[0039] In one embodiment, the protrusion 41 is a hemispherical protrusion 41, and the bump 311 is a hemispherical bump 311. Compared to a pointed or square contact surface, the hemispherical structure can provide a softer contact curve. When the wheel hub 31 rotates and the bump 311 contacts the protrusion 41, there is no obvious impact, but rather a gradual sliding in and out, effectively reducing the impact load, thereby reducing the wear of the protrusion 41 and the bump 311 and extending the service life. At the same time, the semi-circular structure of the bump 311 and the protrusion 41 is less likely to cause mechanical jamming during the mutual misalignment process, and can maintain a more coherent sliding.

[0040] Specifically, the diameter of the protrusion 41 and the bump 311 is 3 cm to 10 cm. The protrusion 41 and the bump 311 of this size can transmit the vibration to the blade 32 without causing excessive impact on the load of the blade 32 and the hub 31, so that the blade 32 can shake off the condensed water and thin ice layer on its surface.

[0041] It is understandable that the size of the protrusions and bumps is several orders of magnitude smaller than that of the hub and blades. The pictures in the drawings of the specification are only schematic diagrams for clearly seeing the protrusions and bumps, and do not represent the actual size and proportion. The size of the bumps and bumps is only in the centimeter level, while the blades of a wind turbine are usually more than ten meters long. Even if the axial vibration displacement of the hub is only a few centimeters, due to the flexible and long blade structure, the vibration of the hub will be amplified to the entire blade, which can achieve the effect of shaking off the condensed water or thin ice layer on the blade.

[0042] The impact of the vibration caused by the abutment of protrusions and bumps, which are only centimeters in size, on the blades and hub is not as great as the fatigue damage caused to the blades and hub by the overall vibration of the wind turbine under strong wind conditions. Therefore, the fatigue damage to the blades and hub caused by de-icing through this vibration function will not reduce the life of the wind turbine.

[0043] Please combine Figure 1 、 Figure 2 and Figure 5 The present invention further provides a deicing method for a wind turbine generator set, which is applied to a wind turbine generator set. The wind turbine generator set 100 includes: The main body 1 includes a mounting end and a connecting end 12, and the mounting end is mounted on the ground; The power generation device 2 is installed at the connection end 12. The power generation device 2 includes a generator 21 and a rotating shaft 22. The generator 21 is connected to the rotating shaft 22. The blade assembly 3 includes a hub 31 and a plurality of blades 32, and the hub 31 is rotatably connected to the rotating shaft 22; The vibration device 4 is mounted on the connection end 12 and abuts against the side of the hub 31 facing the vibration device 4; The temperature sensor and the controller, the temperature sensor and the vibration device 4 are electrically connected to the controller, and the deicing method of the wind turbine generator set includes the following steps: S100: The temperature sensor detects temperature data of the blade surface and sends the temperature data to the controller; S200: The controller compares the temperature data with a preset temperature value; It is understandable that the freezing point of water is affected by many factors and varies in different environments. Therefore, the preset temperature value can be the freezing point of the corresponding environment, or a temperature several degrees above the freezing point. S300: If the temperature data is lower than the preset temperature value, the controller controls the vibration device to drive the hub to vibrate along the axial direction of the hub, so as to drive the blades to vibrate, so as to shake off the condensed water or ice layer on the blades.

[0044] The present invention installs a vibration device 4 at the connection end 12 of the wind turbine generator set 100 and utilizes a temperature sensor in conjunction with a controller to control the hub 31. This causes the hub 31 to vibrate axially when the surface temperature of the blades 32 reaches a preset value, i.e., when the blades are close to freezing. This in turn drives the blades 32 to vibrate, thereby shaking off condensed water or ice on the surface of the blades 32, effectively preventing icing and maintaining the good aerodynamic performance and power generation efficiency of the blades 32. Compared to the prior art method of relying on heating devices to remove ice, the present invention achieves de-icing through physical vibration, which not only reduces the load on the blades 32 and improves wind energy utilization efficiency, but also significantly reduces energy consumption and costs. It has the advantages of simple structure, low energy consumption, and easy maintenance.

[0045] In one embodiment, a protrusion 41 is provided on the side of the vibration device 4 facing the hub 31, and a bump 311 is provided on the side of the hub 31 facing the vibration device 4 for abutting against the protrusion 41. The vibration device 4 includes a vibration driving member 42 and a mounting shell 43. The protrusion 41 is provided on the mounting shell 43. The vibration driving member 42 is connected to the mounting shell 43 and is electrically connected to the controller. The step of the controller controlling the vibration device to drive the hub to vibrate along the axial direction of the hub includes: S310: The controller controls the vibration driving member to start, driving the mounting shell to move toward the hub until the protrusion and the bump are staggered and abut against each other; S320: The blades rotate and drive the hub to rotate, so that the protrusion on the hub slides with the protrusion on the mounting shell, and when the protrusion is facing the protrusion, the hub is pushed up in the direction away from the mounting shell. When the protrusion is misaligned with the protrusion, the hub is reset toward the mounting shell, so that the hub vibrates along its axial direction.

[0046] By linking the vibration generation mechanism with the rotation process of the blades 32, wind energy is not only used for power generation, but also for triggering de-icing vibrations, thereby realizing "self-driven de-icing". Compared with the traditional electric heating de-icing method, it reduces energy consumption, simplifies the structure, and reduces maintenance costs. In addition, the vibration frequency or intensity can be adjusted by the height or arrangement design of the protrusions 311 to adapt to different working conditions, thereby improving the reliability and economy of wind power generation equipment in cold environments as a whole.

[0047] In one embodiment, the protrusion 41 is a hemispherical protrusion 41, the bump 311 is a hemispherical bump 311, the number of the preset temperature values ​​is multiple, and each preset temperature value corresponds to a preset distance; Step S200 includes: S210: The controller compares the temperature data with each of the preset temperature values; S210: If the temperature data is between any two adjacent preset temperature values, taking the preset distance corresponding to the larger preset temperature value as the current preset distance; Step S310 includes: S311: The controller controls the vibration driving member to start, driving the mounting shell to move the current preset distance toward the wheel hub, and causing the protrusion to be staggered and abutted against the bump.

[0048] It is understandable that when there are multiple preset temperature values, corresponding to a variety of different freezing stages, different preset distances can be set according to different temperature values, so that the contact strength between the protrusion 41 and the bump 311 is different. In the initial stage, when only condensed water needs to be shaken off, only low-intensity vibration is required, so the mounting shell 43 only needs to move a short distance toward the hub 31. For temperatures that have already frozen, it is necessary to increase the preset distance and increase the contact depth between the protrusion 41 and the bump 311, thereby increasing the intensity of the axial vibration of the hub 31 and enhancing the vibration stripping effect of the ice layer on the blade 32. By adaptively adjusting the vibration intensity according to the temperature stage, it is possible to ensure the de-icing effect while avoiding mechanical wear and energy waste caused by excessive vibration. In addition, this hierarchical control method can effectively extend the life of the equipment and improve the intelligence and refinement level of the de-icing system, which is particularly suitable for wind power generation scenarios under variable climate conditions.

[0049] The above are only optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A wind turbine generator set, characterized in that: include: A main body, the main body comprising a mounting end and a connecting end, the mounting end being mounted on the ground; A power generation device, the power generation device is installed at the connection end, the power generation device includes a generator and a rotating shaft, and the generator is connected to the rotating shaft; a blade assembly, the blade assembly comprising a hub and a plurality of blades, the hub being rotatably connected to the rotating shaft, the rotation of the blades driving the hub to rotate, and the hub driving the rotating shaft to rotate so that the generator generates electricity; The wheel hub is connected to the wheel hub by a toothed plate, and the toothed plate is connected to the wheel hub by a toothed plate. The toothed plate is connected to the wheel hub by a toothed plate, and the toothed plate is connected to the wheel hub by a toothed plate.

2. The wind turbine generator set according to claim 1, wherein: The mounting shell is arranged in an annular shape, the wheel hub is arranged in a circular shape, the mounting shell is sleeved on the outer periphery of the rotating shaft, and the vibration driving member is arranged to avoid the rotating shaft. There are multiple protrusions, and the multiple protrusions are arranged at intervals along the circumference of the mounting shell. There are multiple bumps, and the multiple bumps are arranged at intervals along the circumference of the wheel hub.

3. The wind turbine generator set according to claim 1, wherein: A temperature sensor is provided on the blade assembly, and the wind turbine generator set also includes a controller. The temperature sensor and the vibration drive member are both electrically connected to the controller. The temperature sensor is used to detect the temperature data of the blade and send it to the controller. The controller is used to control the vibration drive member to push the mounting shell toward the hub when the temperature data is lower than a preset temperature value.

4. The wind turbine generator set according to any one of claims 1 to 3, characterized in that: The rotating shaft is provided with a plurality of sliding grooves along its circumference, the sliding grooves extending along the extension direction of the rotating shaft, the wheel hub is provided with a slider extending into the sliding grooves and slidingly engaging with the sliding grooves, the slider being used to abut against the side walls of the sliding grooves to limit the wheel hub and the rotating shaft along their circumferential directions; An elastic reset member is provided in the rotating shaft, one end of the elastic reset member is connected to the rotating shaft, and the other end is connected to the wheel hub. The elastic reset member is used to elastically deform when the protrusion abuts the bump, and reset the wheel hub through elastic restoring force when the protrusion and the bump are misaligned.

5. The wind turbine generator set according to any one of claims 1 to 3, characterized in that: The protrusion is a hemispherical protrusion, and the bump is a hemispherical bump.

6. A deicing method for a wind turbine generator set, characterized in that: Applicable to a wind turbine generator set, the wind turbine generator set comprising: A main body, the main body comprising a mounting end and a connecting end, the mounting end being mounted on the ground; A power generation device, the power generation device is installed at the connection end, the power generation device includes a generator and a rotating shaft, and the generator is connected to the rotating shaft; a blade assembly, the blade assembly comprising a hub and a plurality of blades, the hub being rotatably connected to the rotating shaft; a vibration device, the vibration device being mounted on the connection end and abutting against a side of the wheel hub facing the vibration device; A temperature sensor and a controller, wherein the temperature sensor and the vibration device are both electrically connected to the controller, and the deicing method of the wind turbine generator set comprises the following steps: The temperature sensor detects temperature data of the blade surface and sends the temperature data to the controller; The controller compares the temperature data with a preset temperature value; If the temperature data is lower than the preset temperature value, the controller controls the vibration device to drive the hub to vibrate along the axial direction of the hub, so as to drive the blades to vibrate, so as to shake off the condensed water or ice layer on the blades.

7. The de-icing method for a wind turbine generator set according to claim 6, wherein: The vibration device is provided with a protrusion on the side facing the hub, and the hub is provided with a bump for abutting against the protrusion on the side facing the vibration device; the vibration device includes a vibration driving member and a mounting shell, the protrusion is provided on the mounting shell, the vibration driving member is connected to the mounting shell and is electrically connected to the controller; The step of the controller controlling the vibration device to drive the hub to vibrate along the axial direction of the hub includes: The controller controls the vibration driving member to start, driving the mounting shell to move toward the hub until the protrusion and the bump are staggered and abut against each other; The blades rotate and drive the hub to rotate, so that the protrusion on the hub slides with the protrusion on the mounting shell, and when the protrusion is facing the protrusion, the hub is pushed up in the direction away from the mounting shell. When the protrusion is misaligned with the protrusion, the hub is reset toward the mounting shell, so that the hub vibrates along its axial direction.

8. The de-icing method for a wind turbine generator set according to claim 7, wherein: The protrusion is a hemispherical protrusion, the bump is a hemispherical bump, the number of the preset temperature values ​​is multiple, and each preset temperature value corresponds to a preset distance; The step of the controller comparing the temperature data with a preset temperature value includes: The controller compares the temperature data with each of the preset temperature values; If the temperature data is between any two adjacent preset temperature values, the preset distance corresponding to the larger preset temperature value is taken as the current preset distance; The controller controls the vibration driving member to start, and drives the mounting shell to move toward the hub until the protrusion and the bump are staggered and abut against each other, comprising: The controller controls the vibration driving member to start, driving the mounting shell to move the current preset distance toward the wheel hub, and causing the protrusion to be staggered and abutted against the bump.

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