Wind turbine load reduction device, system and method based on magnus effect

Abstract

The application discloses a fan load reducing device, system and method based on Magnus effect, which comprises a base, a support, a motor and a plurality of rollers. The base is installed between a tower drum and a base of a fan, and a support for installing the motor is fixed on the base. The plurality of rollers are symmetrically inserted into two sides of the base in two rows, and the rollers on the same side are on the same horizontal plane. Each roller is perpendicular to the main shaft center line of the fan and is driven to rotate by a corresponding motor installed on the support. The rotating roller generates Magnus effect under the action of wind pressure, thereby generating a transverse force, and a part of the load is offset by the transverse force and the external load. The application can effectively reduce the load of the fan without losing power generation, so that a fan with lighter weight can be designed, and the cost of the fan is also reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, in particular to a wind turbine load reduction device, system, method, storage medium and computing device based on Magnus effect. BACKGROUND

[0002] At present, with the continuous progress of wind power generation technology, the cost of wind turbines is increasing. Load is the source of all wind turbine structural design. In order to reduce the manufacturing cost of wind turbines, it is necessary to consider reducing the load of wind turbine main parts.

[0003] During the operation of the wind turbine, the actual load borne by the wind turbine cannot be reduced by changing external factors. The conventional load reduction method is to reduce the load by changing the control strategy of the wind turbine. This method reduces the load of the wind turbine to a limited extent, and the load reduction through the control strategy will lose a certain amount of power generation and affect the income of the wind turbine. Therefore, the conventional load reduction method cannot solve the problem of large load borne by the wind turbine, heavy weight of the wind turbine and high cost of the wind turbine. At present, there is no special wind turbine load reduction structure to solve the above problems. Therefore, a scheme based on Magnus effect is proposed herein, which can reduce the load of the wind turbine without losing power generation, reduce the overall weight of the wind turbine and improve the competitiveness of the wind turbine. SUMMARY

[0004] The first object of the present application is to overcome the shortcomings and deficiencies of the prior art, and to provide a wind turbine load reduction device based on Magnus effect, which can effectively reduce the load of the wind turbine without losing power generation, so that a lighter wind turbine can be designed, and the cost of the wind turbine is also reduced.

[0005] The second object of the present application is to provide a wind turbine load reduction system based on Magnus effect.

[0006] The third object of the present application is to provide a wind turbine load reduction method based on Magnus effect.

[0007] The fourth object of the present application is to provide a storage medium.

[0008] The fifth object of the present application is to provide a computing device.

[0009] The first object of the present application is achieved by the following technical solution: a fan load reduction device based on Magnus effect, comprising: a base, a support, a motor and a roller; wherein the base is installed between a tower drum and a base of the fan, and a support for installing the motor is fixed thereon, the rollers are multiple and are formed into two rows of symmetrically transversely inserted sides of the base, and the rollers located at the same side are on the same horizontal plane, each roller is perpendicular to the main shaft center line of the fan and is driven to rotate by the corresponding motor installed on the support, the rotating roller generates Magnus effect under the action of wind pressure, and then generates a transverse force, and a part of the load is offset by the transverse force and the external load.

[0010] Further, the base is a hollow cylindrical structure, and installation blocks for installing the rollers are formed on the two sides thereof.

[0011] Further, the support is a circular arc segment structure with an arc matched with the inner wall of the base.

[0012] Further, the support is two and is close to the two sides of the inner cavity of the base.

[0013] The second object of the present application is achieved by the following technical solution: a fan load reduction system based on Magnus effect, comprising: a sensing system and the above-mentioned fan load reduction device; wherein the sensing system comprises multiple strain gauge sensors installed at different positions of the tower drum, the sensing system can calculate the size and direction of the fan load by monitoring the deformation of the strain gauge sensors, and then sends an instruction to make the rollers of the fan load reduction device rotate in the opposite direction of the load to generate several transverse forces, the transverse forces will resist the gravity or bending moment from the fan, and finally realize the reduction of the fan load.

[0014] The third object of the present application is achieved by the following technical solution: a fan load reduction method based on Magnus effect, based on the above-mentioned fan load reduction system, the following operations are specifically performed:

[0015] Before the fan operates, the strain gauge sensors on the tower drum need to be calibrated to obtain the relationship between the deformation of the strain gauge sensors on the tower drum and the load, wherein the relationship between different loads and the deformation of the strain gauge sensors can be calibrated through the test of several loads;

[0016] During the operation of the fan, the data of the strain gauge sensors are read in real time, and then the size and direction of the actual fan load can be deduced according to the above-mentioned relationship between the deformation and the load;

[0017] After the size and direction of the actual fan load are known, the size and direction of the load reduction can be obtained, and the fan load reduction system is reversely loaded, so as to realize the purpose of reducing the load.

[0018] Further, when the sensing system detects that the fan load is mainly a vertical load, a control instruction is sent to rotate all the rollers clockwise, so as to generate a resistance to the external force.

[0019] Further, when the sensing system detects that the fan load is mainly a bending moment load, a control instruction is sent to rotate the rollers on one side clockwise and the rollers on the other side counterclockwise, so as to generate a bending moment to resist the external load, respectively.

[0020] The fourth object of the present application is achieved by the following technical solution: a storage medium, which stores a program, the program being executed by a processor to implement the above-mentioned fan load reduction method based on the Magnus effect.

[0021] The fifth object of the present application is achieved by the following technical solution: a computing device, which includes a processor and a memory for storing a program executable by the processor, the processor executing the program stored in the memory to implement the above-mentioned fan load reduction method based on the Magnus effect.

[0022] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0023] 1. The present application provides a fan load reduction device with simple and reliable structure and convenient operation, which fills the gap in the current field.

[0024] 2. The present application can effectively reduce the load of the fan, and only a certain interface needs to be reserved in the fan for installation of the load reduction device, so the application is relatively convenient, and the fan can be applied to any structure form of direct drive unit, semi-direct drive unit and doubly-fed unit.

[0025] 3. The present application can reduce the fan load by 5%-20% and the fan weight by about 2%-10% without loss of power generation, and after the weight of the fan is reduced, the manufacturing cost of the fan is also reduced, thereby improving the competitiveness of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 1 is a structural schematic diagram of a fan load reduction device.

[0027] Figure 2 Fig. 2 is a first installation schematic diagram of the fan load reduction device.

[0028] Figure 3 Fig. 3 is a second installation schematic diagram of the fan load reduction device.

[0029] Figure 4 Fig. 4 is a schematic diagram of installation of a strain gauge sensor on a tower.

[0030] Figure 5The load reduction principle diagram of the fan load reduction system.

[0031] Figure 6 The load reduction principle diagram of the fan load reduction system.

[0032] Figure 7 The load reduction principle diagram of the fan load reduction system. DETAILED DESCRIPTION

[0033] The application will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the application are not limited thereto.

[0034] Embodiment 1

[0035] When the rotational angular velocity of a rotating object does not coincide with the object flight velocity vector, a lateral force will be generated in the direction perpendicular to the plane formed by the rotational angular velocity vector and the translational velocity vector. Under the action of the lateral force, the object flight trajectory will be deflected, which is called the Magnus effect.

[0036] The rotating object can generate a lateral force because the object rotation can drive the surrounding fluid to rotate, so that the fluid velocity on one side of the object increases and the fluid velocity on the other side decreases, thereby generating a lateral force. Therefore, the following fan load reduction device is designed according to this principle.

[0037] As shown in Figures 1 to 3 The embodiment discloses a fan load reduction device based on the Magnus effect, which comprises a base, a support, a motor and a roller. The base is installed between the tower drum and the base of the fan (other models can also be adjusted according to the specific structure of the fan, such as being installed between the elbow and the tower drum), and a support for installing the motor is fixed thereon. The roller has a plurality of rows of symmetrically transversely inserted sides of the base, and the rollers on the same side are on the same horizontal plane. Each roller is perpendicular to the main shaft center line of the fan and is driven to rotate by the corresponding motor installed on the support. The rotating roller generates the Magnus effect under the action of wind pressure, thereby generating a lateral force, and the lateral force and the external load offset a part of the load.

[0038] Specifically, the base is a hollow cylindrical structure, and installation blocks for installing the rollers are formed on both sides of the base.

[0039] Specifically, the support is a circular arc segment structure with an arc that matches the inner wall of the base, and two circular arc segments are tightly attached to both sides of the inner cavity of the base.

[0040] Specifically, the base is installed at the top of the tower drum, and the shape and size of the base match the tower drum. The base is installed at the top of the base through the yaw bearing.

[0041] Embodiment 2

[0042] As Figure 5 shown, the embodiment discloses a fan load reduction system based on the Magnus effect, comprising: a sensing system and the fan load reduction device described in embodiment 1; wherein the sensing system comprises a plurality of strain gauge sensors installed at different positions of the tower drum, as Figure 4 shown, the sensing system can calculate the size and direction of the fan load by monitoring the deformation of the strain gauge sensors (when the tower drum is loaded, the strain gauge sensors at different positions deform differently, and according to the deformation of the sensors along Figure 4 shown, the size and direction of the load can be deduced), and then issue instructions to make the rollers of the fan load reduction device rotate in the opposite direction of the load, so as to generate a number of lateral forces, which will resist the gravity or bending moment from the fan, and ultimately achieve the reduction of the fan load.

[0043] Embodiment 3

[0044] The embodiment discloses a fan load reduction method based on the Magnus effect, based on the fan load reduction system described in embodiment 2, and the following operations are specifically performed:

[0045] Before the fan operates, the strain gauge sensors on the tower drum need to be calibrated to obtain the relationship between the deformation of the strain gauge sensors on the tower drum and the load as Figure 4 shown, when the tower drum bears the load in the figure (i.e. the solid circle in the figure), the strain direction of the sensor is shown by the arrow in the figure, and through testing of a number of loads, the relationship between different loads and the deformation of the strain gauge sensors can be calibrated;

[0046] During the operation of the fan, the data of the strain gauge sensors are read in real time, and then according to the relationship between the deformation and the load calibrated above, the size and direction of the actual fan load can be deduced;

[0047] When the size and direction of the actual fan load are known, the size and direction of the load reduction can be obtained, and the fan load reduction system is loaded in the opposite direction, so as to achieve the purpose of reducing the load.

[0048] When the sensing system detects that the fan load is mainly the vertical downward load, a control instruction is issued to make all the rollers rotate clockwise, so as to generate a resistance to the external force, as Figure 6 shown.

[0049] When the sensing system detects that the fan load is mainly the bending moment load, a control instruction is issued to make the rollers on one side rotate clockwise and the rollers on the other side rotate counterclockwise, so as to generate a bending moment to resist the external load, as Figure 7 shown.

[0050] When the fan load becomes smaller, a lighter fan can be designed, and the cost of the fan is reduced.

[0051] Embodiment 4

[0052] The embodiment discloses a storage medium, which stores a program, and the program is executed by a processor to realize the fan load reduction method based on the Magnus effect in the embodiment 3.

[0053] The storage medium in the embodiment can be a disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), a U disk, a mobile hard disk, and the like.

[0054] Embodiment 5

[0055] The embodiment discloses a computing device, which comprises a processor and a memory for storing a program executable by the processor, and the processor executes the program stored in the memory to realize the fan load reduction method based on the Magnus effect in the embodiment 3.

[0056] The computing device in the embodiment can be a desktop computer, a notebook computer, a smart phone, a PDA handheld terminal, a tablet computer, a programmable logic controller (PLC), or other terminal devices with a processor function.

[0057] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, simplifications, and the like made without departing from the spirit and principle of the present application should be equivalent replacement modes, and all are included in the protection scope of the present application.

Claims

1. The wind turbine load reduction system based on the Magnus effect is characterized by: include: Sensing system and wind turbine load reduction device based on Magnus effect; The wind turbine load reduction device includes: a base, a support, a motor, and rollers. The base is installed between the tower and the base of the wind turbine. A support for installing the motor is fixed to the base. There are multiple rollers, which form two rows symmetrically inserted horizontally on both sides of the base, and the rollers on the same side are on the same horizontal plane. Each roller is perpendicular to the centerline of the wind turbine's main shaft and is driven to rotate by the corresponding motor installed on the support. The rotating rollers produce a Magnus effect under the action of wind pressure, thereby generating lateral force, which offsets part of the load through the lateral force and external load. The sensing system includes multiple strain gauge sensors, which are installed at different positions on the tower. The sensing system can calculate the magnitude and direction of the wind turbine load by monitoring the deformation of the strain gauge sensors, and then issue instructions to rotate the rollers of the wind turbine load reduction device in the opposite direction of the load, so as to generate a number of lateral forces. These lateral forces will resist the gravity or bending moment from the wind turbine, ultimately reducing the wind turbine load.

2. The wind turbine load reduction system based on the Magnus effect according to claim 1, characterized in that: The base is a hollow cylindrical structure, with mounting blocks for mounting rollers formed on both sides.

3. The wind turbine load reduction system based on the Magnus effect according to claim 2, characterized in that: The support is an arc segment structure whose curvature is adapted to the inner wall of the base.

4. The wind turbine load reduction system based on the Magnus effect according to claim 3, characterized in that: There are two supports, which are closely attached to both sides of the inner cavity of the base.

5. A wind turbine load reduction method based on the Magnus effect, characterized in that: Based on the wind turbine load reduction system according to claim 1, the following operations are specifically performed: Before the wind turbine is put into operation, the strain gauge sensor on the tower needs to be calibrated to obtain the relationship between the deformation of the strain gauge sensor on the tower and the load. By testing several loads, the law of different loads and the deformation of the strain gauge sensor can be calibrated. During the operation of the wind turbine, the data of the strain gauge sensor is read in real time, and then the magnitude and direction of the actual wind turbine load can be deduced based on the relationship between the deformation and load obtained above. Once the size and direction of the actual fan load are known, the size and direction of the load reduction can be determined, and the fan load reduction system can be reversely loaded to achieve the purpose of load reduction.

6. The wind turbine load reduction method based on the Magnus effect according to claim 5, characterized in that: When the sensing system detects that the fan load is mainly caused by the vertical downward load, it issues a control command to make all rollers rotate clockwise, thereby generating a force to resist the external force.

7. The method for reducing wind turbine load based on the Magnus effect according to claim 6, characterized in that: When the sensing system detects that the fan load is mainly caused by bending moment load, it issues a control command to make the rollers on one side rotate clockwise and the rollers on the other side rotate counterclockwise, thereby generating a bending moment to resist the external load.

8. A storage medium storing a program, characterized in that: When the program is executed by a processor, the wind turbine load reduction method based on the Magnus effect according to any one of claims 5 to 7 is implemented.

9. A computing device comprising a processor and a memory for storing a program executable by the processor, characterized in that: When the processor executes the program stored in the memory, the wind turbine load reduction method based on the Magnus effect according to any one of claims 5 to 7 is implemented.

Images