Wind power generation device

Abstract

The invention provides a wind power generation device which comprises a tower, a yawing device is arranged at the top end of the tower, a cabin is fixedly connected to the rotating end of the yawing device, a generator, a gear box, a brake mechanism and a main shaft are sequentially arranged in the cabin in the left-right direction, and the generator and the gear box are in transmission through a transmission shaft. One end of the main shaft penetrates through the brake mechanism and then extends into the gearbox, the other end of the main shaft extends out of the cabin and then is fixedly connected with a wind wheel, and a plurality of telescopic blade assemblies are installed in the circumferential direction of the wind wheel. By adopting the design of the telescopic blades, the blades can keep the optimal wind energy capturing state under different wind speed conditions, so that the power generation efficiency is improved. Under different wind speed conditions, the device can automatically adapt to different wind speed conditions through expansion and contraction of the blades, and the adaptability of the wind power generation device is improved. And through the design of the telescopic blades, the wind power generation device can be started at a lower wind speed and can be safely stopped at a higher wind speed, so that the wind energy utilization rate is increased.

Description

Technical Field

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

[0002] With the continuous growth of global energy demand and the improvement of environmental protection awareness, wind power generation, as a clean and renewable energy form, is increasingly valued by countries around the world.

[0003] Existing wind power generation devices all use integral blades, which have the problem of poor adaptability. In particular, the power generation efficiency is greatly reduced under low wind speed conditions, and under high wind speed conditions, there may be risks of overload and damage. Summary of the invention

[0004] The present invention provides a wind power generation device, which is used to solve the defect of poor adaptability of integral blades in the prior art.

[0005] On the one hand, the present invention provides a wind power generation device, including a tower, a yaw device is arranged on the top of the tower, a cabin is fixedly connected to the rotating end of the yaw device, a generator, a gear box, a brake mechanism and a main shaft are arranged in sequence inside the cabin along the left and right directions, the generator and the gear box are transmitted by a transmission shaft, one end of the main shaft passes through the brake mechanism and then extends into the gear box, the other end of the main shaft extends out of the cabin and is fixedly connected to a wind wheel, and a plurality of groups of telescopic blade assemblies are installed circumferentially of the wind wheel.

[0006] Preferably, the telescopic blade assembly includes a first blade and a second blade, the first blade is mounted on the wind wheel, a telescopic chamber is provided inside the first blade, a hydraulic cylinder is provided in the telescopic chamber, an output end of the hydraulic rod is fixedly connected to an output rod, the second blade is fixedly connected to the end face of the output rod, and two groups of left-right symmetrical auxiliary fixing components are provided at the outlet of the telescopic chamber.

[0007] Preferably, the auxiliary fixing assembly on the right side includes a support frame, which is fixedly connected to the outer wall of the first blade through a mounting rod, a horizontally arranged electric telescopic rod 1 is fixedly connected to the right inner wall of the support frame, the telescopic end of the electric telescopic rod 1 is fixedly connected to the fixing frame, a clamping block is fixedly connected to the right inner wall of the fixing frame, and a groove matching the outer wall of the second blade is arranged on the left end face of the clamping block; an electric telescopic rod 2 is fixedly connected to the upper and lower inner walls of the fixing frame respectively, and the telescopic end of the electric telescopic rod 2 is fixedly connected to a matching block.

[0008] Preferably, a blade control system is also included, and the blade control system includes:

[0009] Wind speed collection module, used to collect real-time wind speed and wind direction;

[0010] A data analysis module, used to determine a target extension length of the second blade;

[0011] A control execution module, used for controlling the extension length of the second blade to be adjusted to a target extension length;

[0012] The feedback detection module is used to monitor the execution effect of adjusting the extension length of the second blade.

[0013] Preferably, a blade control system is also included, and the data analysis module includes:

[0014] A first calculation unit, used for calculating an optimal extension length of the second blade;

[0015] Among them, L z is the optimal extension length of the second blade; v is the actual wind speed; cos is the cosine function; θ is the angle between the wind direction and the blade direction; C p is the wind energy conversion coefficient; ρ is the air density; π is the circumference of a circle; P is the rated power of the wind power generation device; L a is the preset guarantee length; R 1 is the radius of the wind wheel; L 1 is the length of the first blade;

[0016] The data generating unit is used to verify the optimal extension length of the second blade and determine the target extension length of the second blade.

[0017] Preferably, the data generating unit includes:

[0018] A data verification unit is used to verify whether the optimal extension length is less than 0. If the optimal extension length is less than 0, the optimal extension length is modified to 0;

[0019] The target length generating unit is used to determine whether the optimal extension length is within the allowable range of the extension length of the second blade. If the optimal extension length is within the allowable range, the target extension length is determined as the optimal extension length, otherwise the target extension length is the maximum extension length of the second blade.

[0020] Preferably, the feedback detection module includes:

[0021] A distance sensor is arranged inside the telescopic cavity and is used to detect the actual extension length of the second blade;

[0022] The error checking unit is used to calculate the execution error between the actual extension length of the second blade and the target extension length.

[0023] S=|L m -L s |; where S is the execution error; L m is the target extension length of the second blade; L sis the actual extension length of the second blade; | | is the absolute value symbol;

[0024] When the execution error is greater than the preset error threshold, an alarm is issued.

[0025] Preferably, a safety regulation system is further included, and the safety regulation system is used to regularly adjust the maximum allowable operating wind speed of the wind power generation device. The safety regulation system calculates the maximum allowable operating wind speed based on the following formula:

[0026] Among them, v f is the maximum allowable operating wind speed; v r is the rated wind speed of the wind turbine; v fq is the maximum allowable operating wind speed obtained in the last calculation; ln is the logarithmic function with e as the base; v s is the average wind speed in the current area; v 0 is the unit wind speed; C p is the wind energy conversion coefficient; ρ is the air density; π is the circumference of a circle; P is the rated power of the wind power generation device; R 1 is the radius of the wind wheel; L 1 is the length of the first blade; G is the total weight of the telescopic blade assembly; A is the cross-sectional area of ​​the second blade; e is a natural constant; T is the operating time of the wind turbine; T m is the expected service life of the wind turbine; g is the acceleration due to gravity.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] By adopting the design of telescopic blades, the blades can maintain the best state of capturing wind energy under different wind speed conditions, thereby improving power generation efficiency. Under different wind speed conditions, the blades can be extended and retracted to enable the device to automatically adapt to different wind speed conditions, thereby improving the adaptability of the wind power generation device. Through the design of telescopic blades, the wind power generation device can start at a lower wind speed and shut down safely at a higher wind speed, thereby improving the utilization rate of wind energy. Under strong wind conditions, the contraction of the blades can reduce the force area and reduce the risk of damage to the wind power generation device, thereby improving its reliability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 is a schematic structural diagram of a telescopic blade assembly of the present invention;

[0032] Figure 3 is a schematic structural diagram of the auxiliary fixing assembly of the present invention;

[0033] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0034] Reference numerals:

[0035] 1. Tower; 2. Yaw device; 3. Cabin; 4. Generator; 5. Gearbox; 6. Brake mechanism; 7. Main shaft; 8. Transmission shaft; 9. Wind wheel; 10. Telescopic blade assembly; 11. First blade; 12. Second blade; 13. Telescopic chamber; 14. Hydraulic cylinder; 15. Output rod; 16. Support frame; 17. Mounting rod; 18. Electric telescopic rod 1; 19. Fixed frame; 20. Clamping block; 21. Electric telescopic rod 2; 22. Matching block. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] Example 1

[0039] An embodiment of the present invention provides a wind power generation device, including a tower 1, a yaw device 2 is arranged on the top of the tower 1, a nacelle 3 is fixedly connected to the rotating end of the yaw device 2, a generator 4, a gear box 5, a brake mechanism 6 and a main shaft 7 are arranged in sequence in the left and right directions inside the nacelle 3, the generator 4 and the gear box 5 are transmitted through a transmission shaft 8, one end of the main shaft 7 passes through the brake mechanism 6 and then extends into the gear box 5, the other end of the main shaft 7 extends out of the nacelle 3 and is fixedly connected to a wind wheel 9, and a plurality of groups of telescopic blade assemblies 10 are circumferentially installed on the wind wheel 9.

[0040] In this embodiment, the yaw device 2 is an existing structure, such as a yaw device for a wind turbine generator set disclosed in CN118855633A.

[0041] The beneficial effects of the above technical solution are:

[0042] By adopting the design of telescopic blades, the blades can maintain the best state of capturing wind energy under different wind speed conditions, thereby improving power generation efficiency. Under different wind speed conditions, the blades can be extended and retracted to enable the device to automatically adapt to different wind speed conditions, thereby improving the adaptability of the wind power generation device. Through the design of telescopic blades, the wind power generation device can start at a lower wind speed and shut down safely at a higher wind speed, thereby improving the utilization rate of wind energy. Under strong wind conditions, the contraction of the blades can reduce the force area and reduce the risk of damage to the wind power generation device, thereby improving its reliability and safety.

[0043] Example 2

[0044] On the basis of Example 1, the telescopic blade assembly 10 includes a first blade 11 and a second blade 12. The first blade 11 is mounted on the wind wheel 9. A telescopic chamber 13 is provided inside the first blade 11. A hydraulic cylinder 14 is provided in the telescopic chamber 13. The output end of the hydraulic rod is fixedly connected to an output rod 15. The second blade 12 is fixedly connected to the end face of the output rod 15. Two groups of left-right symmetrical auxiliary fixing components are provided at the outlet of the telescopic chamber 13.

[0045] Preferably, the auxiliary fixing assembly on the right side includes a support frame 16, which is fixedly connected to the outer wall of the first blade 11 through a mounting rod 17, and a horizontally arranged electric telescopic rod 18 is fixedly connected to the right inner wall of the support frame 16, and the telescopic end of the electric telescopic rod 18 is fixedly connected to a fixing frame 19, and a clamping block 20 is fixedly connected to the right inner wall of the fixing frame 19, and a groove matching the outer wall of the second blade 12 is arranged on the left end face of the clamping block 20; an electric telescopic rod 21 is fixedly connected to the upper and lower inner walls of the fixing frame 19 respectively, and a matching block 22 is fixedly connected to the telescopic end of the electric telescopic rod 21.

[0046] Preferably, a blade control system is also included, and the blade control system includes:

[0047] Wind speed collection module, used to collect real-time wind speed and wind direction;

[0048] A data analysis module, used to determine a target extension length of the second blade 12;

[0049] A control execution module, used for controlling the extension length of the second blade 12 to be adjusted to a target extension length;

[0050] The feedback detection module is used to monitor the execution effect of adjusting the extension length of the second blade 12.

[0051] Preferably, a blade control system is also included, and the data analysis module includes:

[0052] A first calculation unit, used for calculating the optimal extension length of the second blade 12;

[0053] Among them, L z is the optimal extension length of the second blade 12; v is the actual wind speed; cos is the cosine function; θ is the angle between the wind direction and the blade direction; C p is the wind energy conversion coefficient; ρ is the air density; π is the circumference of a circle; P is the rated power of the wind power generation device; L a is the preset guarantee length; R 1 is the radius of the wind wheel; L 1 is the length of the first blade 11;

[0054] The data generating unit is used to verify the optimal extension length of the second blade 12 and determine the target extension length of the second blade 12 .

[0055] Preferably, the data generating unit includes:

[0056] A data verification unit is used to verify whether the optimal extension length is less than 0. If the optimal extension length is less than 0, the optimal extension length is modified to 0;

[0057] The target length generating unit is used to determine whether the optimal extension length is within the allowable range of the extension length of the second blade 12. If the optimal extension length is within the allowable range, the target extension length is determined as the optimal extension length; otherwise, the target extension length is the maximum extension length of the second blade 12.

[0058] Preferably, the feedback detection module includes:

[0059] A distance sensor is disposed inside the telescopic cavity and is used to detect the actual extension length of the second blade 12;

[0060] The error checking unit is used to calculate the execution error between the actual extension length of the second blade 12 and the target extension length.

[0061] S=|L m -L s |; where S is the execution error; L m L is the target extension length of the second blade 12; s is the actual extension length of the second blade 12; | | is the absolute value sign;

[0062] When the execution error is greater than the preset error threshold, an alarm is issued.

[0063] In this embodiment, the matching block 22 is made of a high elasticity and high friction material.

[0064] In this embodiment, the guaranteed length is a preset length value set to ensure that the wind power generation device can operate smoothly.

[0065] The beneficial effects of the above technical solution are:

[0066] When the telescopic blade assembly 10 is extended or retracted, the hydraulic cylinder 14 drives the output rod 15 to extend or retract inside the first blade 11, thereby controlling the extension and retraction of the second blade 12, thereby realizing the telescopic function of the blade.

[0067] When the second blade 12 is extended or retracted, the electric telescopic rod 18 and the electric telescopic rod 21 are both in a retracted state, which facilitates the movement of the second blade 12. When the second blade 12 reaches the target position, the electric telescopic rod 18 is first extended to make the clamping block 20 fit with the left and right side walls of the second blade 12, thereby auxiliary fixing the second blade 12 in the left and right directions. Thereafter, the electric telescopic rod 21 is extended to make the matching block 22 fit with the upper and lower side walls of the second blade 12, and further fix the second blade 12 in the upper and lower directions, thereby ensuring the overall stability of the telescopic blade during the operation of the wind turbine, further strengthening the connection strength between the first blade 11 and the second blade 12, and improving the safety of the blade during use.

[0068] By collecting real-time wind speed and calculating the target extension length of the second blade 12, automatic control of the extension length of the second blade 12 is achieved. By adjusting the extension length of the second blade 12, the wind turbine is at the optimal efficiency point, thereby improving the power generation efficiency of the wind turbine.

[0069] Example 3

[0070] On the basis of Embodiment 1 or 2, a safety regulation system is further included. The safety regulation system is used to regularly adjust the maximum allowable operating wind speed of the wind power generation device. The safety regulation system calculates the maximum allowable operating wind speed based on the following formula:

[0071] Among them, v f is the maximum allowable operating wind speed; v r is the rated wind speed of the wind turbine; v fq is the maximum allowable operating wind speed obtained in the last calculation; ln is the logarithmic function with e as the base; v s is the average wind speed in the current area; v 0 is the unit wind speed; C p is the wind energy conversion coefficient; ρ is the air density; π is the circumference of a circle; P is the rated power of the wind power generation device; R 1 is the radius of the wind wheel; L 1 is the length of the first blade 11; G is the total weight of the first blade 11 and the second blade 12; A is the cross-sectional area of ​​the second blade 12; e is a natural constant; T is the operating time of the wind power generation device; T m is the expected service life of the wind turbine; g is the acceleration due to gravity.

[0072] In this embodiment, the rated wind speed of the wind power generation device is the wind speed at which the wind power generation device operates at the optimal efficiency point.

[0073] The beneficial effects of the above technical solution are:

[0074] By regularly calculating the maximum allowable operating wind speed of a wind turbine, the rationality of the maximum allowable operating wind speed of the wind turbine is ensured, so that the maximum allowable operating wind speed of the wind turbine matches the actual wind resistance capacity, thereby improving the safety of the operation of the wind turbine.

[0075] 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 wind power generation device, characterized in that: The invention comprises a tower (1), a yaw device (2) is arranged at the top of the tower (1), a nacelle (3) is fixedly connected to the rotating end of the yaw device (2), a generator (4), a gear box (5), a brake mechanism (6) and a main shaft (7) are arranged in sequence in the nacelle (3) along the left and right directions, the generator (4) and the gear box (5) are transmitted through a transmission shaft (8), one end of the main shaft (7) passes through the brake mechanism (6) and then extends into the gear box (5), the other end of the main shaft (7) extends out of the nacelle (3) and then is fixedly connected to a wind wheel (9), and a plurality of groups of telescopic blade assemblies (10) are circumferentially installed on the wind wheel (9).

2. A wind power generation device according to claim 1, characterized in that: The telescopic blade assembly (10) comprises a first blade (11) and a second blade (12), wherein the first blade (11) is mounted on a wind wheel (9), a telescopic chamber (13) is arranged inside the first blade (11), a hydraulic cylinder (14) is arranged inside the telescopic chamber (13), an output rod (15) is fixedly connected to the output end of the hydraulic rod, the second blade (12) is fixedly connected to the end surface of the output rod (15), and two groups of bilaterally symmetrical auxiliary fixing assemblies are arranged at the outlet of the telescopic chamber (13).

3. A wind power generation device according to claim 1, characterized in that: The right auxiliary fixing assembly comprises a support frame (16), the support frame (16) is fixedly connected to the outer wall of the first blade (11) through a mounting rod (17), a horizontally arranged electric telescopic rod 1 (18) is fixedly connected to the right inner wall of the support frame (16), the telescopic end of the electric telescopic rod 1 (18) is fixedly connected to a fixing frame (19), a clamping block (20) is fixedly connected to the right inner wall of the fixing frame (19), and a groove matching the outer wall of the second blade (12) is arranged on the left end surface of the clamping block (20); the upper and lower inner walls of the fixing frame (19) are respectively fixedly connected to an electric telescopic rod 2 (21), and the telescopic end of the electric telescopic rod 2 (21) is fixedly connected to a matching block (22). In this embodiment, the matching block (22) is made of a high elasticity, high friction material.

4. A wind power generation device according to claim 2, characterized in that: It also includes a blade control system, which includes: Wind speed collection module, used to collect real-time wind speed and wind direction; A data analysis module, used to determine a target extension length of the second blade (12); A control execution module, used for controlling the extension length of the second blade (12) to be adjusted to a target extension length; The feedback detection module is used to monitor the execution effect of adjusting the extension length of the second blade (12).

5. A wind power generation device according to claim 4, characterized in that: It also includes a blade control system, and the data analysis module includes: A first calculation unit, used for calculating an optimal extension length of the second blade (12); Among them, L z is the optimal extension length of the second blade (12); v is the actual wind speed; cos is the cosine function; θ is the angle between the wind direction and the blade direction; C p is the wind energy conversion coefficient; ρ is the air density; π is the circumference of a circle; P is the rated power of the wind power generation device; L a is a preset guaranteed length; R1 is the radius of the wind wheel (9); L1 is the length of the first blade (11); The data generating unit is used to verify the optimal extension length of the extension length of the second blade (12) and determine the target extension length of the second blade (12).

6. A wind power generation device according to claim 5, characterized in that: The data generation unit includes: A data verification unit is used to verify whether the optimal extension length is less than 0. If the optimal extension length is less than 0, the optimal extension length is modified to 0; The target length generating unit is used to determine whether the optimal extension length is within the allowable range of the extension length of the second blade (12); if the optimal extension length is within the allowable range, the target extension length is determined to be the optimal extension length; otherwise, the target extension length is the maximum extension length of the second blade (12).

7. A wind power generation device according to claim 6, characterized in that: The feedback detection module includes: A distance sensor is arranged inside the telescopic cavity and is used to detect the actual extension length of the second blade (12); An error checking unit is used to calculate an execution error between an actual extension length of the second blade (12) and a target extension length, S=|L m -L s |; where S is the execution error; L m L is the target extension length of the second blade (12); s is the actual extended length of the second blade (12); || is the absolute value sign; When the execution error is greater than the preset error threshold, an alarm is issued.

8. A wind power generation device according to claim 4, characterized in that: It also includes a safety regulation system, which is used to regularly adjust the maximum allowable operating wind speed of the wind turbine. The safety regulation system calculates the maximum allowable operating wind speed based on the following formula: Among them, v f is the maximum allowable operating wind speed; v r is the rated wind speed of the wind turbine; v fq is the maximum allowable operating wind speed obtained in the last calculation; ln is the logarithmic function with e as the base; v s is the average wind speed in the current area; v0 is the unit wind speed; C p is the wind energy conversion coefficient; ρ is the air density; π is the circumference of a circle; P is the rated power of the wind power generation device; R1 is the radius of the wind wheel (9); L1 is the length of the first blade (11); G is the total weight of the telescopic blade assembly (10); A is the cross-sectional area of ​​the second blade (12); e is a natural constant; T is the operating time of the wind power generation device; T m is the expected service life of the wind turbine; g is the acceleration due to gravity.

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