Gyro assembly, fan blade, impeller and wind turbine generator set

Abstract

The present disclosure provides a kind of gyro assembly, fan blade, impeller and wind turbine generator unit, the fan blade includes blade body, web plate and gyro assembly, the blade body has inner cavity;The web plate is fixedly arranged in the inner cavity;The gyro assembly is arranged on the web plate, the gyro assembly includes at least one gyro, wherein the gyro assembly is configured to adjust the stability of the fan blade by the rotation of the gyro.

Description

Technical Field

[0001] This disclosure pertains to the field of wind power generation technology, and particularly relates to a gyroscope assembly, wind turbine blade, impeller, and wind turbine generator set. Background Technology

[0002] In the field of wind power technology, the development of large-rotor, high-power units is characterized by power output proportional to the square of the rotor diameter and weight proportional to the cube of the rotor diameter. Gravity loads significantly increase the design costs of components, including blades, pitch bearings, main bearings, gearboxes, and hubs. The stability of long, flexible blades is increasingly becoming a design bottleneck. Lightweight blade design leads to severe blade flare damping losses, headroom challenges safety limits, and flutter speeds are approaching the maximum safe operating speed. Summary of the Invention

[0003] The main objective of this disclosure is to provide a gyroscope assembly, wind turbine blade, impeller, and wind turbine generator set to improve the stability of wind turbine blades.

[0004] To achieve the above objectives, this disclosure provides the following technical solution:

[0005] In one aspect, this disclosure provides a wind turbine blade, the wind turbine blade including a blade body, a web, and a gyroscope assembly, the blade body having an inner cavity; the web fixedly disposed in the inner cavity; the gyroscope assembly disposed on the web, the gyroscope assembly including at least one gyroscope, wherein the gyroscope assembly is configured to adjust the stability of the wind turbine blade by rotating the gyroscope.

[0006] In an exemplary embodiment of this disclosure, the gyroscope assembly further includes a gyroscope base, on which at least one gyroscope is rotatably disposed. The at least one gyroscope is capable of rotating about its own rotation axis, which has a first angle with the blade span direction S, a second angle with the chord direction C, and a third angle with the thickness direction, wherein the thickness direction is perpendicular to both the blade span direction S and the chord direction C.

[0007] Optionally, each of the gyroscopes is provided with a corresponding gyroscope base, and the at least one gyroscope includes a first gyroscope, a second gyroscope, and a third gyroscope. The first gyroscope is adapted to rotate about a first rotation axis, the second gyroscope is adapted to rotate about a second rotation axis, and the third gyroscope is adapted to rotate about a third rotation axis.

[0008] In another exemplary embodiment of this disclosure, the first gyroscope, the second gyroscope, and the third gyroscope are arranged at intervals along the blade span direction S of the wind turbine blade.

[0009] Optionally, the first rotation axis, the second rotation axis, and the third rotation axis are perpendicular to each other.

[0010] Specifically, the gyroscope mounts are arranged in pairs, and the line connecting each pair of gyroscope mounts is set at a predetermined angle to the web plate.

[0011] Furthermore, the line connecting each pair of gyroscope mounts is perpendicular to the web.

[0012] In another exemplary embodiment of this disclosure, the rotation axes of the two gyroscopes in each pair of gyroscope mounts are parallel, intersecting, or coincident.

[0013] Optionally, the wind turbine blade includes a web, and each pair of gyroscope seats are respectively disposed on both sides of the web.

[0014] Furthermore, the wind turbine blade includes at least two webs, which extend along the axial direction of the wind turbine blade and are arranged parallel to each other at intervals along the chord direction of the wind turbine blade, and each pair of gyroscope seats is disposed between at least two webs.

[0015] In another exemplary embodiment of this disclosure, the gyroscope assembly is disposed near the tip of the wind turbine blade, and the distance L1 from the gyroscope assembly to the root of the wind turbine blade satisfies 0.5L≤L1≤2 / 3L, where L is the axial length of the wind turbine blade.

[0016] In another aspect, this disclosure provides an impeller comprising a hub and at least two fan blades disposed on the outer periphery of the hub, the fan blades being fan blades as described above.

[0017] In another aspect, this disclosure provides a wind turbine generator set, the wind turbine generator set including a vibration sensor, a control device, and an impeller as described above, the vibration sensor being used to monitor the vibration of the wind turbine blades, and the control device being used to receive the monitoring data from the vibration sensor and to control the operating state of the gyroscope assembly based on the monitoring data.

[0018] In another aspect, this disclosure provides a gyroscope assembly suitable for wind turbine blades, the gyroscope assembly being attached to the web of the wind turbine blade, the gyroscope assembly including a gyroscope, wherein the gyroscope assembly is configured to adjust the stability of the wind turbine blade by rotating the gyroscope.

[0019] In one exemplary embodiment of this disclosure, the gyroscope assembly further includes a gyroscope base, the gyroscope being rotatably disposed on the gyroscope base about a rotation axis, and the gyroscope assembly further includes a drive member adapted to drive the gyroscope to rotate.

[0020] Optionally, the gyroscope assembly further includes a support, the gyroscope base being adapted to be connected to the web plate via the support.

[0021] Specifically, the gyroscope assembly includes a pair of gyroscope mounts arranged in pairs, the pair of gyroscope mounts being adapted to be disposed on opposite sides of the web, wherein the pair of supports are adapted to be disposed opposite to each other on opposite sides of the web.

[0022] Furthermore, the gyroscope assembly includes a pair of gyroscope mounts arranged in pairs, the pair of mounts being adapted to be disposed opposite to each other on opposite sides of a pair of webs, such that the pair of gyroscope mounts are disposed between adjacent pairs of webs, and the pair of gyroscope mounts are connected by a connector.

[0023] In another exemplary embodiment of this disclosure, the gyroscope assembly includes at least three gyroscopes spaced apart along the blade span direction S of the wind turbine blades, wherein the at least three gyroscopes include at least one first gyroscope, at least one second gyroscope, and at least one third gyroscope, the first gyroscope being adapted to rotate about a first rotation axis, the second gyroscope being adapted to rotate about a second rotation axis, and the third gyroscope being adapted to rotate about a third rotation axis.

[0024] The gyroscope assembly, wind turbine blade, impeller, and wind turbine generator set provided in this disclosure have at least the following beneficial effects: The gyroscope assembly provided in this disclosure can be used to install on wind turbine blades to adjust the stability of the wind turbine blades by rotating the gyroscope. Attached Figure Description

[0025] The above and / or other objects and advantages of this disclosure will become clearer from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A partial structural diagram of a wind turbine blade provided for a first exemplary embodiment of this disclosure.

[0027] Figure 2 A partial structural diagram of a wind turbine blade provided for a second exemplary embodiment of this disclosure.

[0028] Figure 3 A partial structural diagram of a wind turbine blade provided for a third exemplary embodiment of this disclosure.

[0029] Figure 4 A partial structural diagram of a wind turbine blade provided for a fourth exemplary embodiment of this disclosure.

[0030] Figure 5 A partial structural diagram of a wind turbine blade provided for the fifth exemplary embodiment of this disclosure.

[0031] Figure 6A partial structural diagram of a wind turbine blade provided for the sixth exemplary embodiment of this disclosure.

[0032] Figure 7 A partial structural diagram of a wind turbine blade provided for the seventh exemplary embodiment of this disclosure.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Blade body; 11. Web;

[0035] 12. Web plate support; 13. Gyroscope base;

[0036] 14. First spinning top; 15. Second spinning top;

[0037] 16. Third gyroscope; 17. First axis of rotation;

[0038] 18. Driving component; 19. Gyroscope mount;

[0039] 20. Connectors. Detailed Implementation

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be construed that the embodiments of this disclosure are limited to those described herein. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0041] An exemplary embodiment of this disclosure provides a wind turbine generator set, which includes a tower, an impeller and a generator supported on the top of the tower, the impeller being connected to the input shaft of the generator to drive the generator to generate electricity through the rotation of the impeller. The impeller includes a hub and at least two wind turbine blades connected to the hub. During the operation of the wind turbine generator set, the wind turbine blades may vibrate. The gyroscope assembly provided in this disclosure can be applied to the wind turbine blades to adjust the stability of the wind turbine blades.

[0042] Specifically, the gyroscope assembly provided in this disclosure includes at least one gyroscope configured to be mounted on a web 11 to rotate about a rotation axis, thereby adjusting the stability of the wind turbine blades. The angle of the gyroscope's rotation axis can be selected according to actual needs.

[0043] In one or more embodiments, the gyroscope provided in this disclosure includes a mass block that can rotate about a rotation axis under the drive of a driving member. The shape of the mass block can be selected according to actual needs, for example, but not limited to, the mass block being cylindrical.

[0044] In one or more embodiments, the gyroscope provided in this disclosure refers to a rigid body that rotates at high speed around a fulcrum. Gyroscopes have fixed axis and precession properties and are widely used in various industries. The web provided in this disclosure is one of the main structural components of the main beam of a wind turbine blade. When the wind turbine blade is subjected to flaring loads, the web will bear a large compressive load, which directly affects the safety performance of the wind turbine blade. According to different structural designs, the types of webs include single webs, double webs, and small webs.

[0045] Reference Figure 1 The wind turbine blade may include a blade body 10 and a web 11. The web 11 extends from the blade root to the blade tip along the blade span direction S. The blade span direction S and chord direction C of the wind turbine blade are shown in the figure. For ease of description, this embodiment takes the example of a gyroscope whose rotation axis is perpendicular to both the blade span direction S and the chord direction C.

[0046] To facilitate gyroscope installation, the gyroscope assembly also includes a gyroscope base 13, each gyroscope base 13 being provided with at least one gyroscope, each gyroscope being capable of rotating around its own axis of rotation.

[0047] In this embodiment, the example is a gyroscope base 13 with a gyroscope. In this embodiment, the gyroscope base 13 can be a hexahedral shell structure, and the gyroscope is arranged on a pair of opposite sidewalls of the gyroscope base 13 as needed.

[0048] Continue to refer to Figure 1 Specifically, the gyroscope base 13 includes opposing first and second sidewalls. The gyroscope can be a first gyroscope 14, which is driven by a drive member 18 to rotate about a rotation axis. The drive member 18 can be connected to the first sidewall, for example, but not limited to, a servo motor, whose output shaft can be perpendicular to the first sidewall, but is not limited thereto. The output shaft of the drive member 18 can be fixed to the first end of a first rotating shaft 17, and the second end of the first rotating shaft 17 is rotatably connected to the second sidewall. That is, in this embodiment, the first rotating shaft 17 is rotatably disposed between opposing first and second sidewalls, and the first rotating shaft 17 is perpendicular to both the first and second sidewalls, but is not limited thereto. The first rotating shaft 17 is adapted to rotate about a first rotation axis, so that the first gyroscope 14 can rotate about the first rotation axis. In this embodiment, the first rotation axis is approximately perpendicular to both the blade span direction S and the chord direction C, such as... Figure 1 As shown.

[0049] It is understood that, as needed, the first rotation axis 17 can also be set on two other sets of opposite sidewalls of the gyroscope base 13, so that the first rotation axis is approximately parallel to the blade span direction S or the chord direction C, but is not limited thereto.

[0050] Specifically, the first rotation axis has a first angle with the blade span direction S, a second angle with the chord direction C, and a third angle with the thickness direction, wherein the thickness direction is perpendicular to both the blade span direction S and the chord direction C. As an example, the first angle can satisfy 0° ≤ first angle ≤ 90°. Similarly, the second and third angles satisfy 0° ≤ second angle ≤ 90° and 0° ≤ third angle ≤ 90°.

[0051] Continue to refer to Figure 1 To enable connection with the web plate 11, the gyroscope assembly may also include a support. Specifically, the support may include a web plate support 12 fixed to the web plate 11 and a gyroscope base support 19 fixed to the gyroscope base 13. The web plate support 12 and the gyroscope base support 19 are matched, for example, but not limited to, the web plate support 12 and the gyroscope base support 19 are arranged in pairs and threaded together. By connecting the gyroscope base support 19 to the web plate support 12, the gyroscope base 13 can be connected to the web plate 11. As an example, the gyroscope base support 19 and the web plate support 12 may be threaded together to form a detachable connection, facilitating the disassembly, assembly, and maintenance of the gyroscope assembly, but this is not a limitation. The fixing method between the support and the web plate is not limited, including but not limited to fastening, bonding, magnetic attraction, mechanical engagement, and deformation engagement. In addition, the support and the web plate may also be integrally formed to form a connection.

[0052] Furthermore, in this embodiment, a web 11 is provided inside the wind turbine blade, and the gyroscope assembly may include a pair of gyroscopes arranged in pairs. The pair of gyroscopes may be symmetrically arranged on both sides of the web 11, that is, the two gyroscopes are respectively arranged on both sides of the web 11 along the chord C. As an example, the two gyroscopes may be symmetrically arranged with respect to the web 11, but this is not a limitation.

[0053] In this embodiment, the gyroscope assembly includes a pair of gyroscope mounts 13, which form a pair of gyroscopes, and are respectively disposed on opposite sides of the web plate 11. In this embodiment, the two gyroscopes within the pair of gyroscope mounts 13 can rotate around their respective axes of rotation, and the axes of rotation of the two gyroscopes are approximately parallel, but not limited thereto. Furthermore, the axes of rotation of the two gyroscopes may intersect or coincide, all of which are within the scope of this disclosure.

[0054] The line connecting the two gyroscope mounts 13 in a pair of gyroscopes can be set at a predetermined angle to the web plate 11. (Refer to...) Figure 1 The line connecting the two gyroscope bases 13 in each gyroscope pair is set approximately perpendicular to the web plate 11, but this is not a limitation. It is understood that when a pair of gyroscopes is set perpendicular to the web plate 11, the line connecting the pair of gyroscopes is approximately parallel to the chord direction C, but this is not a limitation.

[0055] In addition, the angle between the line connecting the two gyroscope bases 13 in each pair of gyroscopes and the web plate 11 can be 30°, 45°, 60°, etc., which can be selected according to actual needs.

[0056] To improve the effectiveness of the gyroscope assembly, the gyroscope assembly can be positioned close to the tip of the wind turbine blade. For example, but not limited to, the distance L1 from the gyroscope assembly to the root of the wind turbine blade satisfies 0.5L≤L1≤2 / 3L (which is beneficial for blade space optimization and lightning protection constraints). L is the length of the wind turbine blade in the blade span direction S. In this embodiment, the blade span direction S of the wind turbine blade can also be referred to as the axial direction of the wind turbine blade.

[0057] This disclosure generates a reaction torque about another axis of the gyroscope by applying a controllable torque about the axis of rotation to the gyroscope, and the reaction torque is also generated on the corresponding wind turbine blade. The controllable torque can be applied to generate at least partially resisting or offsetting the undesirable vibration torque of the wind turbine blade. That is, by setting the gyroscope and making the gyroscope rotate inside the wind turbine blade, the negative torque of the wind turbine blade can be resisted or offset, thereby improving the stability of the wind turbine blade.

[0058] Reference Figure 2 ,and Figure 1 Unlike the previous embodiment, this embodiment has an increased number of gyroscopes. To further improve the stability of the wind turbine blades, the gyroscope assembly may include at least one first gyroscope 14, at least one second gyroscope 15, and at least one third gyroscope 16. The first gyroscope 14 can rotate around a first rotation axis, the second gyroscope 15 can rotate around a second rotation axis, and the third gyroscope 16 can rotate around a third rotation axis. The first gyroscope 14, the second gyroscope 15, and the third gyroscope 16 are spaced apart along the blade span direction S. In this way, when the wind turbine blades experience vibration or other instability, the vibration resistance can be distributed to different gyroscopes according to the vibration condition and amplitude. The multiple gyroscopes work together to restore the stability of the wind turbine blades, thereby improving the adaptability of the wind turbine blades to various operating conditions, which means improving the stability or vibration resistance of the wind turbine blades.

[0059] Continue to refer to Figure 2 The gyroscope assembly also includes at least three pairs of gyroscopes, which are spaced apart along the blade span direction S. Among the three pairs of gyroscopes, there is at least one first gyroscope 14, at least one second gyroscope 15, and at least one third gyroscope 16. The first gyroscope 14 is capable of rotating about a first rotation axis, the second gyroscope 15 is capable of rotating about a second rotation axis, and the third gyroscope 16 is capable of rotating about a third rotation axis. The first rotation axis, the second rotation axis, and the third rotation axis are perpendicular to each other, but not limited thereto.

[0060] The line connecting the two gyroscope bases 13 in each gyroscope pair can be set at a predetermined angle to the web plate 11. (Refer to...) Figure 2 The line connecting the two gyroscope mounts 13 in each gyroscope pair is approximately perpendicular to the web plate 11, but this is not a limitation. Furthermore, the angle between the line connecting the two gyroscope mounts 13 in each gyroscope pair and the web plate 11 can be 30°, 45°, 60°, etc., and can be selected according to actual needs. In this embodiment, multiple pairs of gyroscopes are arranged approximately in parallel, which facilitates modular production and assembly of the gyroscope components and helps reduce maintenance costs, but this is not a limitation.

[0061] Depending on actual needs, adjacent gyroscope pairs can be spaced at equal intervals along the blade span direction S, but this is not a limitation.

[0062] Reference Figure 3 and Figure 4 The structural diagram of the wind turbine blade provided in another exemplary embodiment of this disclosure is consistent with... Figure 1 Unlike the previous embodiment, in this embodiment, the wind turbine blades include at least two webs 11, and a pair of gyroscopes is disposed between two adjacent webs 11. In this embodiment, the gyroscope pair also includes a connector 20, which connects the pair of gyroscopes. By providing the connector 20 between the two gyroscopes, the structural strength of the gyroscope assembly is further improved. Optionally, the portion between the two gyroscopes can also be directly formed into a single connecting part without the need for corresponding connecting elements.

[0063] To improve the intelligence of wind turbine generator sets and reduce manual operation and maintenance costs, wind turbine generator sets may also include vibration sensors, control devices, and rotors. Vibration sensors are used to monitor the vibration of the wind turbine blades, and control devices are used to receive the monitoring data from the vibration sensors and control the operating status of the gyroscope components based on the monitoring data.

[0064] In one or more embodiments, gyroscopic torque is used to improve unit stability, mainly utilizing the gyroscopic torque generated by the motion characteristics of modes such as impeller rotation, fan blade oscillation, fan blade flapping, and fan blade torsion. In the figure, J is the rotor inertia of the gyroscope, Ω is the rotational speed of the gyroscope, and ω is the revolution speed of the gyroscope. The gyroscope has the effect of counteracting the disturbance and deformation of the blade. This gyroscope is a single-axis rotating gyroscope with the advantage of modular installation. It is fixed on a single web or between two webs according to the following requirements for control stability and rotation direction.

[0065] Reference Figure 5 In this embodiment, the X direction is the windward direction of the wind turbine blades, the Y direction indicates the forward direction of the wind turbine blades, and the Z direction indicates the downward direction of the wind turbine blades. Additionally, the blade span direction S and chord direction C of the wind turbine blades are shown in the figure.

[0066] In this embodiment, the rotation axis of the gyroscope is set perpendicular to both the blade span direction S and the chord direction C. The angular velocity ω of the gyroscope is in the direction indicated by the arrow, which is perpendicular to both the blade span direction S and the chord direction C of the wind turbine blade. In this way, the rotation of the gyroscope can improve the flapping stability of the wind turbine blade. It mainly improves the flapping stability of the wind turbine blade through the following mechanism. Improving the flapping stability is also beneficial to improving the oscillation stability.

[0067] Impeller self-rotation influence analysis: The impeller rotates in the same direction as the gyroscope. According to the principle of gyroscope torque calculation, the gyroscope torque does not generate additional torque on the fan blades, that is, this installation method will not bring any additional side effects.

[0068] Blade vibration stability analysis: When the wind turbine blades are disturbed and accelerate forward (i.e., in the Y direction), in the same direction as the gyroscope rotation, according to the principle of gyroscope torque calculation, the gyroscope torque does not produce any additional torque on the wind turbine blades, i.e., there are no other side effects; when the wind turbine blades are disturbed and accelerate backward (i.e., in the opposite direction of the Y direction), no additional torque is produced either. Therefore, this installation method does not bring any additional side effects.

[0069] Blade flapping stability analysis: When the blade is disturbed and accelerates in the downwind direction (i.e., the X direction), according to the principle of gyro torque calculation, the gyro torque can be calculated to drive the blade to tilt up; when the blade is disturbed and accelerates in the upwind direction (i.e., the opposite direction of the X direction), according to the principle of gyro torque calculation, the gyro torque can be calculated to drive the blade to tilt down; that is, this installation method is beneficial to flapping stability.

[0070] Blade torsional stability analysis: When the blade is disturbed and tilts upward (i.e., in the opposite direction of the Z-axis), according to the principle of gyroscopic torque calculation, this gyroscopic torque drives the blade to move against the wind; when the blade is disturbed and tilts downward, according to the principle of gyroscopic torque calculation, this gyroscopic torque drives the blade to move with the wind. Therefore, this installation method is detrimental to torsional stability.

[0071] Specifically, taking a 90m wind turbine blade as an example, the gyroscope is installed at a cross-section 60m from the blade root. This cross-section has a chord length of approximately 1.6m and an absolute thickness of approximately 0.43m. The designed moment of inertia of the gyroscope is 3.2 kg·m. 2 With a rotation speed of approximately 5600 rpm and a gyroscope mount size of approximately 0.4 m, it can reduce the energy of the first-order aligning mode of the blade in the in-plane bending moment at the blade root by 12%.

[0072] Reference Figure 6 In this embodiment, the X direction is the windward direction of the wind turbine blades, the Y direction indicates the forward direction of the wind turbine blades, and the Z direction indicates the downward direction of the wind turbine blades. Additionally, the blade span direction S and chord direction C of the wind turbine blades are shown in the figure.

[0073] In this embodiment, the rotation axis of the gyroscope is set approximately parallel to the blade span direction S. In this embodiment, the angular velocity ω of the gyroscope is in the direction indicated by the arrow, where the arrow is parallel to the blade span direction S. Thus, the rotation of the gyroscope can improve the oscillation stability of the wind turbine blades. It mainly improves the blade clearance and oscillation stability through the following mechanisms.

[0074] Analysis of the impact of impeller rotation: Based on the principle of gyro torque calculation, it can be concluded that the gyro torque drives the blades to move against the wind, which can improve the safety of the airspace.

[0075] Blade oscillation stability analysis: When the blade is disturbed and accelerates forward, the gyroscopic torque, calculated according to the principle of gyroscopic torque calculation, drives the blade to move against the wind; when the blade is disturbed and accelerates backward, the gyroscopic torque drives the blade to move with the wind. Therefore, this installation method tends to improve oscillation stability by adjusting the angle of attack.

[0076] Blade flapping stability analysis: When the blade is disturbed and accelerates in the downwind direction, the gyroscopic torque drives the blade forward; when the blade is disturbed and accelerates in the upwind direction, the gyroscopic torque drives deceleration. This means that this installation method is detrimental to flapping stability, but the large aerodynamic damping in the flapping direction can offset this adverse effect.

[0077] Blade torsional stability analysis: When the blade is disturbed and tilts upward, according to the principle of gyroscopic torque calculation, the gyroscopic torque does not generate any additional torque on the blade, i.e., there are no other side effects; when the blade is disturbed and tilts downward, according to the principle of gyroscopic torque calculation, the gyroscopic torque does not generate any additional torque on the blade, i.e., there are no other side effects. Therefore, this installation method will not bring any additional side effects.

[0078] Specifically, taking a 90m blade as an example, the gyroscope is installed at a cross-section 60m from the blade root. This cross-section has a chord length of approximately 1.6m and an absolute thickness of approximately 0.43m. The designed moment of inertia of the gyroscope is 3.2 kg·m. 2 With a rotation speed of approximately 5600 rpm and a gyroscope mount size of approximately 0.4 m, it can reduce the energy of the first-order aligning mode of the blade in the in-plane bending moment at the blade root by 4.4%.

[0079] Reference Figure 7 In this embodiment, the X direction is the windward direction of the wind turbine blades, the Y direction indicates the forward direction of the wind turbine blades, and the Z direction indicates the downward direction of the wind turbine blades. Additionally, the blade span direction S and chord direction C of the wind turbine blades are shown in the figure.

[0080] In this embodiment, the rotation axis of the gyroscope is set parallel to the chord direction C. In this embodiment, the angular velocity ω of the gyroscope is in the direction indicated by the arrow, where the arrow is parallel to the chord direction C of the wind turbine blade. This can improve stall and headroom margin, mainly through the following mechanisms:

[0081] Analysis of the impact of impeller self-rotation: Based on the principle of gyro torque calculation, it can be concluded that the gyro torque drives the blades to tilt downwards. Therefore, this installation method can improve the blade stall margin.

[0082] Blade oscillation stability analysis: When the blade is disturbed and accelerates forward, the gyroscopic torque, calculated according to the principle of gyroscopic torque calculation, drives the blade to tilt downwards; when the blade is disturbed and decelerates backwards, the gyroscopic torque drives the blade to tilt upwards. Therefore, this installation method is detrimental to oscillation stability.

[0083] Blade flapping stability analysis: When the blade is disturbed and accelerates in the downwind direction, according to the gyroscopic torque calculation principle, this gyroscopic torque does not generate any additional torque on the blade, i.e., there are no other side effects; when the blade is disturbed and accelerates in the upwind direction, according to the gyroscopic torque calculation principle, this gyroscopic torque does not generate any additional torque on the blade, i.e., there are no other side effects. Therefore, this installation method has no impact on flapping stability.

[0084] Blade torsional stability analysis: When the blade is disturbed and tilts upward, the gyroscopic torque drives the blade to accelerate; when the blade is disturbed and tilts downward, the gyroscopic torque drives the blade to decelerate. This installation method is beneficial for torsional stability.

[0085] Specifically, taking a 90m blade as an example, the gyroscope is installed at a 60m cross-section, where the chord length is approximately 1.6m and the absolute thickness is approximately 0.43m. The designed moment of inertia of the gyroscope is 3.2 kg·m. 2 With a rotational speed of approximately 28,500 rpm and a gyroscope mount size of approximately 0.4 m, it can increase the energy of the first-order aligning mode of the blade in the in-plane bending moment at the blade root by 3.3%.

[0086] The gyroscope assembly adopts a modular form, and the direction of the gyroscope's rotation axis is not affected by its external dimensions. That is, the mounting direction of the gyroscope on the web plate 11 can be determined according to actual needs.

[0087] The gyroscope assembly also includes accessories for supporting the gyroscope, such as, but not limited to, a support, gyroscope base 13, or connector 20, which can be modularly installed to improve the installation efficiency of the gyroscope assembly. The gyroscope base 13 adopts a three-axis symmetrical form, such as a cube or a sphere, to facilitate installation and orientation adjustment. As an example, in this embodiment, the gyroscope base 13 has a hexahedral structure.

[0088] The aforementioned accessories for supporting the gyroscope are made of materials with low-temperature resistance and fatigue resistance. When the gyroscope base 13 is connected and fixed to the web plate 11, the fixing point is reinforced to ensure a reliable connection and fixation between the gyroscope base 13 and the web plate 11.

[0089] In one or more embodiments, the wind turbine blades provided in this disclosure, by providing a gyroscope assembly on the web and placing the gyroscope assembly close to the blade tip, can effectively improve the stability of blade oscillation, flapping, torsion and stall, and has great economic benefits for lightweight blade design and weight reduction.

[0090] Currently, turbine impeller diameters are getting larger and larger, and the requirements for weight reduction and cost reduction are getting higher and higher. Design uncertainties are increasing significantly. In the blade design, gyroscopes in different directions are installed to specifically solve stall / headroom / shimmy / torsional stability.

[0091] If you need to solve the oscillation stability problem, choose Figure 5 medium solution or Figure 6 Installation method in the middle section; if clearance issues need to be addressed, select... Figure 6 medium solution or Figure 7 Installation method (medium scheme); if stalling issues need to be resolved, select... Figure 7 The installation method is as follows: If multiple problems exist simultaneously, multiple corresponding installation methods can be selected at the same time.

[0092] For stall / clearance issues, the gyroscope should only be activated when the unit is operating near the rated wind speed. To address shimmy / torsional stability, the gyroscope should only be activated when the unit is operating at a pitch angle of 3 degrees or more. In other operating ranges of the unit, the gyroscope can be turned off to avoid long-term reliability degradation.

[0093] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to 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 of this disclosure.

[0094] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0095] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0096] The features, structures, or characteristics described in this disclosure can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the foregoing description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

Claims

1. A wind turbine blade, characterized in that, The wind turbine blades include: The blade body (10) has an inner cavity; The web plate (11) is fixedly disposed in the inner cavity; A gyroscope assembly is disposed on the web (11), wherein the gyroscope assembly is configured to adjust the stability of the wind turbine blades by rotating the gyroscope. The gyroscope assembly includes a pair of gyroscope seats (13) disposed on the web (11), each gyroscope seat (13) being provided with at least one gyroscope, and each gyroscope being rotatably disposed on a corresponding gyroscope seat (13). The wind turbine blade includes one web (11), and each pair of gyroscope seats (13) is respectively disposed on both sides of the web (11), or the wind turbine blade includes at least two webs (11), and each pair of gyroscope seats (13) is disposed between at least two webs (11). The gyroscope assembly includes a pair of first gyroscopes (14), a pair of second gyroscopes (15), and a pair of third gyroscopes (16). The first gyroscope (14) is adapted to rotate about a first rotation axis, the second gyroscope (15) is adapted to rotate about a second rotation axis, and the third gyroscope (16) is adapted to rotate about a third rotation axis. The first rotation axis, the second rotation axis, and the third rotation axis are perpendicular to each other.

2. The wind turbine blade as described in claim 1, characterized in that, The gyroscope is capable of rotating around its own rotation axis, which has a first angle with the blade span direction S, a second angle with the chord direction C, and a third angle with the thickness direction, wherein the thickness direction is perpendicular to both the blade span direction S and the chord direction C.

3. The wind turbine blade as described in claim 1, characterized in that, The first gyroscope (14), the second gyroscope (15) and the third gyroscope (16) are arranged at intervals along the blade span direction S of the wind turbine blade.

4. The wind turbine blade as described in claim 1, characterized in that, The line connecting each pair of gyroscope mounts (13) is set at a predetermined angle to the web plate (11).

5. The wind turbine blade as described in claim 4, characterized in that, The line connecting each pair of gyroscope mounts (13) is perpendicular to the web plate (11).

6. The wind turbine blade as described in claim 4, characterized in that, The rotation axes of the two gyroscopes in each pair of gyroscope mounts (13) are parallel, intersecting, or coincident.

7. The wind turbine blade as described in claim 4, characterized in that, At least two of the webs (11) extend along the span direction S of the fan blade and are arranged parallel to each other at intervals along the chord direction C of the fan blade.

8. The wind turbine blade as described in claim 1, characterized in that, The gyroscope assembly is positioned close to the tip of the wind turbine blade, and the distance L1 from the gyroscope assembly to the root of the wind turbine blade satisfies 0.5L≤L1≤2 / 3L, where L is the span length S of the wind turbine blade.

9. An impeller, characterized in that, The impeller includes a hub and at least two fan blades disposed on the outer periphery of the hub, wherein the fan blades are fan blades as described in any one of claims 1-8.

10. A wind turbine generator set, characterized in that, The wind turbine generator set includes a vibration sensor, a control device, and an impeller as described in claim 9. The vibration sensor is used to monitor the vibration of the wind turbine blades, and the control device is used to receive the monitoring data from the vibration sensor and control the operating state of the gyroscope assembly based on the monitoring data.

11. A gyroscope assembly, characterized in that, A gyroscope assembly is used for connecting to the web (11) of a wind turbine blade. The gyroscope assembly includes a pair of gyroscope mounts (13) for mounting on the web (11). Each gyroscope mount (13) has at least one gyroscope, and each gyroscope is rotatably mounted on its corresponding gyroscope mount (13). The gyroscope assembly is configured to adjust the stability of the wind turbine blade by rotating the gyroscopes. The wind turbine blade includes one web (11), and each pair of gyroscope seats (13) is respectively disposed on both sides of the web (11); or, the wind turbine blade includes at least two webs (11), and each pair of gyroscope seats (13) is disposed between at least two webs (11). The gyroscope assembly includes a pair of first gyroscopes (14), a pair of second gyroscopes (15), and a pair of third gyroscopes (16). The first gyroscope (14) is adapted to rotate about a first rotation axis, the second gyroscope (15) is adapted to rotate about a second rotation axis, and the third gyroscope (16) is adapted to rotate about a third rotation axis. The first rotation axis, the second rotation axis, and the third rotation axis are perpendicular to each other.

12. The gyroscope assembly as claimed in claim 11, characterized in that, Each of the gyroscopes is rotatably mounted on a corresponding gyroscope base (13) about a rotation axis, and the gyroscope assembly further includes a drive element adapted to drive the gyroscope to rotate.

13. The gyroscope assembly as claimed in claim 12, characterized in that, The gyroscope assembly also includes a support, the gyroscope base (13) being adapted to be connected to the web plate (11) via the support.

14. The gyroscope assembly as claimed in claim 13, characterized in that, The gyroscope assembly includes a pair of gyroscope mounts (13) arranged in pairs, the pair of gyroscope mounts (13) being adapted to be disposed on opposite sides of the web (11), wherein the pair of mounts are adapted to be disposed opposite to opposite sides of the web (11).

15. The gyroscope assembly as claimed in claim 13, characterized in that, A pair of supports are adapted to be disposed opposite to each other on opposite sides of a pair of webs (11) such that a pair of gyroscope seats (13) are disposed between adjacent pairs of webs and the pair of gyroscope seats (13) are connected by a connector.

16. The gyroscope assembly as claimed in claim 13, characterized in that, The first gyroscope (14), the second gyroscope (15) and the third gyroscope (16) are arranged at intervals along the blade span direction S of the wind turbine blade.

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