Tower structure and wind driven generator

Abstract

The invention provides a tower structure and a wind driven generator, and relates to the technical field of wind power generation, the tower structure comprises a first tower body, the top end of the first tower body is connected with a wind driven generator unit through a bolt assembly, and the bottom end of the first tower body is connected with a second tower body and a third tower body through a plurality of bolt assemblies from top to bottom; a fixed bottom plate is arranged at the bottom end of the third tower body, and a tower body fixing device is arranged at the bottom end of the fixed bottom plate. The tower body is connected and fixed through the bolt assembly, and then the tower structure is effectively supported through the tower body fixing device. Therefore, the technical problems that in an existing tower structure, the connecting mode of a tower support is complex, a lifting rod needs to be used for connection, the structure is complex, the using amount of steel is large, and cost is high are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a tower structure and a wind power generator. Background Art

[0002] As a green and renewable energy source, wind power generation has been widely used around the world. However, the tower part of wind turbines often faces challenges such as high wind speed, vibration, and corrosion in harsh environments.

[0003] Existing tower structures, such as the invention patent CN 118686746 A, a tower structure and its construction method, have a complex connection method for the tower bracket, and also need to use a lifting rod for connection, which often has the problems of complex structure, large amount of steel and high cost. Therefore, in view of the above situation, it is urgent to develop a tower structure and a wind turbine to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides a tower structure and a wind turbine generator to solve the technical problems that the connection method of the tower bracket in the existing tower structure proposed in the above background technology is complicated and requires the use of lifting rods for connection, which often has complex structure, large amount of steel and high cost.

[0005] In order to solve the above technical problems, the present invention discloses a tower structure, including: a tower body one, the top of the tower body one is connected to the wind turbine generator set by a bolt assembly, the bottom end of the tower body one is connected to the tower body two and the tower body three by a plurality of groups of bolt assemblies from top to bottom respectively, the bottom end of the tower body three is provided with a fixed bottom plate, and the bottom end of the fixed bottom end is provided with a tower body fixing device.

[0006] Preferably, the bolt assembly between the tower body 1 and the tower body 2 comprises: a plurality of plug rods 1, wherein the plug rods 1 are transversely inserted into the slots provided between the tower body 2 and the tower body 1, and then the plug rods 1 are connected by bolts 1.

[0007] Preferably, the tower body fixing device includes: a fixed base, the tower body three penetrates the fixed base and is clamped with the inner wall of the bottom end of the fixed base, and the top peripheral side of the fixed base is fixedly connected to the fixed base plate by bolt two, the driving motor is fixedly installed at the bottom end of the right inner wall of the fixed base, and the output end of the driving motor is fixedly connected to one end of the threaded rod, and the other end of the threaded rod is rotatably connected to the inner wall of the left end of the fixed base, and the left and right ends of the threaded rod have opposite threads, and the left and right ends of the threaded rod are respectively threadedly connected with a fixing mechanism.

[0008] Preferably, the fixing mechanism includes: a slider, which is threadedly connected to the threaded rod, a connecting rod is fixedly installed on the top of the slider, two groups of blocks are fixedly installed on the end of the connecting rod close to the tower body three, the blocks are clamped in the installation grooves provided in the tower body three, and the plug rod two passes through the fixed bottom plate and the fixed base and is clamped with the two groups of blocks.

[0009] Preferably, the tower body is made of composite material, and the outer surface is coated with anti-corrosion coating and anti-ultraviolet coating.

[0010] A wind turbine generator comprises: a nacelle, wherein the bottom end of the nacelle is connected to a tower body through a bolt assembly, a rotating shaft is arranged at the left end of the nacelle, one end of the rotating shaft is connected to a wind blade, and the other end of the rotating shaft is connected to an input end of the wind turbine generator.

[0011] Preferably, the nacelle shell is made of weather-resistant composite material, the wind blades are made of carbon fiber composite material, and the surface of the wind blades is coated with a low-friction coating.

[0012] Preferably, the wind turbine generator is a permanent magnet wind turbine generator, and the permanent magnet wind turbine generator further comprises:

[0013] Wind speed sensor, used to detect the real-time wind speed at the cabin height;

[0014] A controller and an alarm, wherein the controller is electrically connected to the wind speed sensor and the alarm, and the controller controls the alarm to work based on the wind speed sensor.

[0015] Preferably, the wind turbine generator comprises the following steps:

[0016] Step 1: According to formula (1), calculate the leakage magnetic coefficient I of the permanent magnet wind turbine:

[0017]

[0018] Where P y is the magnetic flux density of the permanent magnet in the permanent magnet wind turbine, E y is the magnetic flux intensity of the permanent magnet in the permanent magnet wind turbine, S y is the cross-sectional area of ​​the permanent magnet in the permanent magnet wind turbine, L y is the length of the permanent magnet in the magnetization direction of the permanent magnet wind turbine, k is the magnetic resistance coefficient of the permanent magnet in the permanent magnet wind turbine, P q is the magnetic flux density of the air gap between the rotor and the stator in the permanent magnet wind turbine, E q is the magnetic flux density of the air gap, S q is the air gap area, L q is the air gap length;

[0019] Step 2: According to the following formula (2), the actual starting resistance torque T of the permanent magnet wind turbine generator can be calculated:

[0020]

[0021] Where s is the number of pole pairs of the permanent magnet wind turbine, λ is the correction coefficient of the force on the rotor when the permanent magnet wind turbine rotates, μ is the empirical coefficient of magnetic energy utilization of the permanent magnet wind turbine, α is the rotation displacement angle when the rotor rotates in the permanent magnet wind turbine, Z y is the width of the permanent magnet, H y is the axial length of the permanent magnet, R is the outer diameter of the rotor in the permanent magnet wind turbine, and cos is the cosine.

[0022] Preferably, the actual power P absorbed by the wind blades from the wind is calculated according to the following formula (3) and the detection value of the wind speed sensor, and the controller compares the actual power P absorbed by the wind blades from the wind with the preset power range. When the actual power is lower than the preset power range, the controller controls the alarm to sound an alarm:

[0023]

[0024] in is the tip speed ratio of the wind blade, C q is the tangential induction factor of the wind blade, C z is the axial induction factor of the wind blade, A is the swept area of ​​the wind blade, ρ is the air density, V is the detection value of the wind speed sensor, and π is 3.14. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a tower structure provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the internal structure of a tower structure provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the internal structure of a fixing device provided in an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. Tower body 1; 2. Tower body 2; 3. Tower body 3; 4. Fixed bottom plate; 5. Rod 1; 6. Bolt 1; 7. Fixed base; 8. Bolt 2; 9. Drive motor; 10. Threaded rod; 11. Slider; 12. Connecting rod; 13. Block; 14. Mounting slot; 15. Rod 2; 16. Cabin; 17. Rotating shaft; 18. Wind blade. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides the following embodiments

[0034] Example 1

[0035] An embodiment of the present invention provides a tower structure, such as Figure 1-2 As shown, it includes: a tower body 1, the top of the tower body 1 is connected to the wind turbine generator set through a bolt assembly, the bottom end of the tower body 1 is connected to the tower body 2 and the tower body 3 from top to bottom through a plurality of groups of bolt assemblies respectively, the bottom end of the tower body 3 is provided with a fixed bottom plate 4, and the bottom end of the fixed bottom end 4 is provided with a tower body fixing device.

[0036] The beneficial effect of the above technical solution is that the present invention connects and fixes the tower body through the bolt assembly, and then effectively supports the tower structure through the tower body fixing device, thereby effectively improving the technical problems proposed in the background technology: the connection method of the tower bracket in the existing tower structure is complicated, and it also needs to use a lifting rod for connection, which often has complex structure, large amount of steel and high cost.

[0037] Example 2

[0038] On the basis of Example 1, Figure 2-3 As shown, a wind turbine, the bolt assembly between the tower body 1 and the tower body 2 includes: a plurality of plug rods 5, the plug rods 5 are horizontally inserted into the slots provided between the tower body 2 and the tower body 1, and then the plug rods 5 are connected by bolts 6.

[0039] Optionally, the tower body fixing device includes: a fixed base 7, the tower body 3 penetrates the fixed base 7 and is clamped with the inner wall of the bottom end of the fixed base 7, and the top peripheral side of the fixed base 7 is fixedly connected to the fixed base plate 4 by bolts 8, the drive motor 9 is fixedly installed at the bottom end of the right inner wall of the fixed base 7, and the output end of the drive motor 9 is fixedly connected to one end of the threaded rod 10, and the other end of the threaded rod 10 is rotatably connected to the inner wall of the left end of the fixed base 7, and the left and right ends of the threaded rod 10 have opposite threads, and the left and right ends of the threaded rod 10 are respectively threadedly connected with a fixing mechanism.

[0040] The present invention includes, through the fixing mechanism, a slider 11, the slider 11 is threadedly connected to the threaded rod 10, a connecting rod 12 is fixedly installed on the top of the slider 11, two groups of blocks 13 are fixedly installed on one end of the connecting rod 12 close to the tower body 3, the blocks 13 are clamped in the mounting groove 14 provided in the tower body 3, and the second plug rod 15 passes through the fixed bottom plate 4 and the fixed base 7 and is clamped with the two groups of blocks 13.

[0041] The tower body of the present invention is made of composite materials, and the outer surface is coated with an anti-corrosion coating and an anti-ultraviolet coating.

[0042] The working principle of the above technical scheme is: the tower body three 3 is inserted into the fixed base 7 by the tower crane, and then the driving motor 9 is started, the driving motor 9 rotates to drive the threaded rod 10 fixedly connected thereto to rotate, the threaded rod 10 rotates to drive the slider 11 threadedly connected thereto to rotate, and the slider 11 rotates to drive the connecting rod 12 fixedly connected thereto to move in the direction close to the tower body three 3, until a number of blocks 13 fixedly installed on the connecting rod 12 are inserted into the mounting groove 14 set at the bottom end of the tower body three 3, and then the plug rod two 15 is plugged into the block 13 through the fixed base plate 4 and the fixed base 7, and then the fixed base plate 4 and the fixed base 7 are fixed together by a number of bolts two 8, and then the bottom end of the tower body two 2 is inserted into the top end of the tower body three 3 by the tower crane, and then the tower body two 2 and the tower body three 3 are fixed by the plug rod one 5 and the bolt one 6, and then the tower body two 2 and the tower body three 3 are fixed in the same way, and the bottom end of the cabin 16 is connected to the tower body one 1.

[0043] The beneficial effects of the above technical scheme are as follows: the present invention is conducive to the movement of a plurality of blocks 13 by setting a driving motor 9 and a threaded rod 10, thereby fixing the blocks 13 and the mounting grooves 14; by setting a plurality of bolts 2 8, the fixed base plate 4 and the fixed base 7 are fixedly connected, thereby increasing their connection with the ground; by connecting the plug rod 2 15 with the fixed base plate 4, the fixed base 7 and a plurality of blocks 13, the tower body 3 3 is further fixed; by setting the plug rod 1 5 and the bolt 1 6, it is conducive to the connection of the tower body 1 , the tower body 2 2 and the tower body 3 3; by using a composite material for the tower frame, the durability is improved.

[0044] Example 3

[0045] On the basis of Example 1-2, a wind turbine generator comprises: a nacelle 16, the bottom end of which is connected to a tower body 1 through a bolt assembly, a rotating shaft 17 is provided at the left end of the nacelle 16, one end of the rotating shaft 17 is connected to a wind blade 18, and the other end of the rotating shaft 17 is connected to an input end of the wind turbine generator.

[0046] Optionally, the shell of the nacelle 1 is made of a weather-resistant composite material, the wind blades 18 are made of a carbon fiber composite material, and the surface of the wind blades 18 is coated with a low-friction coating.

[0047] Optionally, the wind turbine generator is a permanent magnet wind turbine generator, and the permanent magnet wind turbine generator further comprises:

[0048] A wind speed sensor, used to detect the real-time wind speed at the height of the cabin 16;

[0049] A controller and an alarm, wherein the controller is electrically connected to the wind speed sensor and the alarm, and the controller controls the alarm to work based on the wind speed sensor.

[0050] Optionally, include the following steps:

[0051] Step 1: According to formula (1), calculate the leakage magnetic coefficient I of the permanent magnet wind turbine:

[0052]

[0053] Where P y is the magnetic flux density of the permanent magnet in the permanent magnet wind turbine, E y is the magnetic flux intensity of the permanent magnet in the permanent magnet wind turbine, S y is the cross-sectional area of ​​the permanent magnet in the permanent magnet wind turbine, L y is the length of the permanent magnet in the magnetization direction of the permanent magnet wind turbine, k is the reluctance coefficient of the permanent magnet in the permanent magnet wind turbine (the range is 1.05-1.45), P qis the magnetic flux density of the air gap between the rotor and the stator in the permanent magnet wind turbine, E q is the magnetic flux density of the air gap, S q is the air gap area, L q is the air gap length;

[0054] Step 2: According to the following formula (2), the actual starting resistance torque T of the permanent magnet wind turbine generator can be calculated:

[0055]

[0056] Where s is the number of pole pairs of the permanent magnet wind turbine, λ is the correction coefficient of the force on the rotor when the permanent magnet wind turbine rotates (the value range is 0.45-0.73), μ is the empirical coefficient of magnetic energy utilization of the permanent magnet wind turbine (the value range is 0.25-0.68), α is the rotation displacement angle of the rotor when the permanent magnet wind turbine rotates, Z y is the width of the permanent magnet, H y is the axial length of the permanent magnet, R is the outer diameter of the rotor in the permanent magnet wind turbine, and cos is the cosine.

[0057] Optionally, the actual power P absorbed by the wind blade 18 from the wind is calculated according to the following formula (3) and the detection value of the wind speed sensor. The controller compares the actual power P absorbed by the wind blade 18 from the wind with a preset power range. When the actual power is lower than the preset power range, the controller controls the alarm to sound an alarm:

[0058]

[0059] in is the tip speed ratio of the wind blade 18, C q is the tangential induction factor of the wind blade 18 (the speed of the airflow in the annular direction when the wind rotor wake rotates), C z is the axial induction factor of the wind blade 18 (an important parameter that describes the effect of the wind rotor blade on the axial velocity reduction of the airflow passing through the wind rotor), A is the swept area of ​​the wind blade 18, ρ is the air density, V is the detection value of the wind speed sensor, and π is 3.14.

[0060] The beneficial effects of the above technical solution are as follows: the controller calculates the magnetic leakage coefficient of the permanent magnet wind generator based on the formula (1), and comprehensively considers the magnetic flux density of the permanent magnet in the permanent magnet wind generator, the magnetic flux intensity of the permanent magnet in the permanent magnet wind generator, the cross-sectional area of ​​the permanent magnet in the permanent magnet wind generator, the length of the permanent magnet in the magnetization direction of the permanent magnet in the permanent magnet wind generator, the magnetic resistance coefficient of the permanent magnet in the permanent magnet wind generator, the magnetic flux density of the air gap between the rotor and the stator in the permanent magnet wind generator, the magnetic flux intensity of the air gap, the air gap area, and the air gap length, so that the calculation result is more accurate and reliable;

[0061] Then, according to formula (2), the actual starting resistance torque of the permanent magnet wind generator is calculated by comprehensively considering the number of pole pairs of the permanent magnet wind generator, the correction coefficient of the force on the rotor of the permanent magnet wind generator, the empirical coefficient of magnetic energy utilization of the permanent magnet wind generator, the rotation displacement angle of the rotor of the permanent magnet wind generator, the width of the permanent magnet, the axial length of the permanent magnet, and the outer diameter of the rotor of the permanent magnet wind generator, so that the calculation result is more accurate and reliable.

[0062] Finally, according to the following formula (3) and the detection value of the wind speed sensor, the actual power absorbed by the wind blade 18 from the wind is calculated, and the tip speed ratio of the wind blade 18, the tangential induction factor of the wind blade 18, the axial induction factor of the wind blade 18, the swept area of ​​the wind blade 18, and the air density are comprehensively considered.

[0063] The controller controls the detection value of the wind speed sensor and controls the operation of the alarm. The controller compares the actual power absorbed by the wind blades 18 from the wind with the preset power range. When the actual power is lower than the preset power range, the controller controls the alarm to sound an alarm, thereby reminding the staff to promptly check the permanent magnet wind turbine to see if it is damaged and replace it in time, thereby meeting the user's needs for this type of wind turbine.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tower structure, characterized in that: include: A tower body (1) is provided, wherein the top of the tower body (1) is connected to a wind turbine generator set via a bolt assembly, and the bottom of the tower body (1) is connected to a tower body (2) and a tower body (3) via a plurality of groups of bolt assemblies from top to bottom, respectively; a fixed bottom plate (4) is provided at the bottom of the tower body (3), and a tower body fixing device is provided at the bottom of the fixed bottom end (4).

2. A tower structure according to claim 1, characterized in that: The bolt assembly between the tower body 1 (1) and the tower body 2 (2) comprises: a plurality of insertion rods 1 (5), wherein the insertion rods 1 (5) are transversely inserted into the slots provided between the tower body 2 (2) and the tower body 1 (1), and then the insertion rods 1 (5) are connected by bolts 1 (6).

3. A tower structure according to claim 1, characterized in that: The tower body fixing device comprises: a fixed base (7), the tower body three (3) penetrates the fixed base (7) and is clamped with the inner wall of the bottom end of the fixed base (7), and the top peripheral side of the fixed base (7) is fixedly connected to the fixed base plate (4) by bolt two (8), the driving motor (9) is fixedly installed at the bottom end of the right inner wall of the fixed base (7), and the output end of the driving motor (9) is fixedly connected to one end of the threaded rod (10), and the other end of the threaded rod (10) is rotatably connected to the inner wall of the left end of the fixed base (7), and the left and right ends of the threaded rod (10) are oppositely threaded, and the left and right ends of the threaded rod (10) are respectively threadedly connected with a fixing mechanism.

4. A tower structure according to claim 3, characterized in that: The fixing mechanism comprises: a slider (11), the slider (11) being threadedly connected to the threaded rod (10), a connecting rod (12) being fixedly mounted on the top of the slider (11), two groups of clamping blocks (13) being fixedly mounted on one end of the connecting rod (12) close to the tower body three (3), the clamping blocks (13) being clamped in mounting grooves (14) provided in the tower body three (3), and a second insertion rod (15) penetrating the fixed bottom plate (4) and the fixed base (7) and being clamped with the two groups of clamping blocks (13).

5. A tower structure according to claim 1, characterized in that: The tower body is made of composite materials, and the outer surface is coated with anti-corrosion coating and anti-ultraviolet coating.

6. A wind turbine generator, applied to a tower structure according to any one of claims 1 to 5, characterized in that: include: A nacelle (16), wherein the bottom end of the nacelle (16) is connected to the tower body (1) via a bolt assembly, a rotating shaft (17) is provided at the left end of the nacelle (16), one end of the rotating shaft (17) is connected to a wind blade (18), and the other end of the rotating shaft (17) is connected to an input end of a wind turbine generator.

7. A wind turbine according to claim 6, characterized in that: The shell of the nacelle (1) is made of a weather-resistant composite material, the wind blades (18) are made of a carbon fiber composite material, and the surface of the wind blades (18) is coated with a low-friction coating to improve durability and reduce air resistance.

8. A wind turbine according to claim 6, characterized in that: The wind turbine generator adopts a permanent magnet wind turbine generator, and the permanent magnet wind turbine generator further comprises: A wind speed sensor for detecting the real-time wind speed at the height of the cabin (16); A controller and an alarm, wherein the controller is electrically connected to the wind speed sensor and the alarm, and the controller controls the alarm to work based on the wind speed sensor.

9. A wind turbine according to claim 8, characterized in that: The following steps are involved: Step 1: According to formula (1), calculate the leakage magnetic coefficient I of the permanent magnet wind turbine: Where P y is the magnetic flux density of the permanent magnet in the permanent magnet wind turbine, E y is the magnetic flux intensity of the permanent magnet in the permanent magnet wind turbine, S y is the cross-sectional area of ​​the permanent magnet in the permanent magnet wind turbine, L y is the length of the permanent magnet in the magnetization direction of the permanent magnet wind turbine, k is the magnetic resistance coefficient of the permanent magnet in the permanent magnet wind turbine, P q is the magnetic flux density of the air gap between the rotor and the stator in the permanent magnet wind turbine, E q is the magnetic flux density of the air gap, S q is the air gap area, L q is the air gap length; Step 2: According to the following formula (2), the actual starting resistance torque T of the permanent magnet wind turbine generator can be calculated: Where s is the number of pole pairs of the permanent magnet wind turbine, λ is the correction coefficient of the force on the rotor when the permanent magnet wind turbine rotates, μ is the empirical coefficient of magnetic energy utilization of the permanent magnet wind turbine, α is the rotation displacement angle when the rotor rotates in the permanent magnet wind turbine, Z y is the width of the permanent magnet, H y is the axial length of the permanent magnet, R is the outer diameter of the rotor in the permanent magnet wind turbine, and cos is the cosine.

10. A wind turbine according to claim 8, characterized in that: According to the following formula (3) and the detection value of the wind speed sensor, the actual power P absorbed by the wind blade (18) from the wind is calculated, and the controller compares the actual power P absorbed by the wind blade (18) from the wind with the preset power range. When the actual power is lower than the preset power range, the controller controls the alarm to sound an alarm: in is the tip speed ratio of the wind blade (18), C q is the tangential induction factor of the wind blade (18), C z is the axial induction factor of the wind blade (18), A is the swept area of ​​the wind blade (18), ρ is the air density, V is the detection value of the wind speed sensor, and π is 3.14.

Images