Stable wind power generation tower structure

Abstract

The invention relates to the technical field of wind power generation, in particular to a stable wind power generation tower structure which comprises a tower frame, a cabin, a blade mechanism, a transmission mechanism, a speed regulating mechanism, a blade mounting mechanism and a central control unit. The tower frame comprises an overground foundation and a tower body, a central control room door is arranged on the lower portion of the tower body, and the cabin is rotationally connected to the top end of the tower body; a wind direction sensor is arranged at the upper end of the cabin, a signal sending end of the wind direction sensor is connected with a signal receiving end of the central control unit, a generator is arranged at the rear end in the cabin, the blade mechanism comprises a blade mounting frame and blades, and the blade mounting frame is rotationally connected to the front side of the cabin and is in transmission connection with a rotor of the generator through a transmission mechanism. The three blades are evenly arranged on the blade mounting frame in the circumferential direction. According to the stable wind power generation tower structure, by arranging the speed regulating mechanism, the two functions of yawing and speed limiting in the prior art are achieved at the same time.

Description

Technical Field

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

[0002] As a clean and renewable energy source, wind power generation is increasingly valued by countries around the world. Wind power generation has the advantages of large reserves, wide distribution, zero pollution and greenhouse gas emissions. Existing wind power generation equipment uses wind to drive the blades to rotate, and increases the output shaft rotation speed through a speed increaser, thereby driving the generator to generate electricity. Wind power generation equipment uses the tower body and foundation as the supporting basis. The material of the tower body and the structural design of the foundation play a vital role in the equipment's earthquake and wind resistance.

[0003] Since the wind speed and direction in nature are unstable, the windward side of the blade needs to self-adjust in real time so that its windward side is opposite to or misaligned with the wind. The adjustment process will generate huge energy consumption and affect the power generation efficiency of the power generation equipment. Summary of the invention

[0004] The present invention provides a stable wind power generation tower structure, which is equipped with a speed regulating mechanism to simultaneously realize the two functions of yaw and speed limit in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a stable wind power tower structure, including a tower frame and a nacelle, a blade mechanism, a transmission mechanism, a speed regulating mechanism, a blade mounting mechanism and a central control unit; The tower frame comprises an above-ground foundation and a tower body located above the above-ground foundation, and a central control room door is arranged at the lower part of the tower body; The nacelle is rotatably connected to the top of the tower body, a wind direction sensor is arranged at the upper end of the nacelle, a signal sending end of the wind direction sensor is connected to a signal receiving end of a central control unit, and a generator is arranged at the rear end of the nacelle; The blade mechanism comprises a blade mounting frame and blades, wherein the blade mounting frame is rotatably connected to the front side of the nacelle, the blade mounting frame is transmission-connected to the rotor of the generator through a transmission mechanism, and the blades are three evenly arranged on the blade mounting frame along the circumferential direction; The central control unit is located in the tower body.

[0006] Furthermore, a reinforcement mechanism is arranged on the outer side of the lower part of the tower body, and the reinforcement mechanism comprises a support component, a first diagonal brace, a second diagonal brace, a third diagonal brace and a fourth diagonal brace; the support component is located on the outer side of the tower body, and a compensation component is arranged between the support component and the tower body, and the compensation component is used to fill the gap between the support component and the tower body; the central axis of the first diagonal brace coincides with the central axis of the second diagonal brace, the upper end of the first diagonal brace is hinged to the support component, a first force unloading component is arranged between the first diagonal brace and the second diagonal brace, and the A base is hinged at the lower end, the central axes of the third diagonal brace rod and the fourth diagonal brace rod coincide with each other, the upper end of the third diagonal brace rod is hinged to the first diagonal brace rod, a second force unloading component is arranged between the third diagonal brace rod and the fourth diagonal brace rod, and the lower end of the fourth diagonal brace rod is hinged to the ground foundation; when the tower body is offset, the first diagonal brace rod is driven to squeeze the first force unloading component downward, and the first force unloading component is contracted under the force, and at the same time, the third diagonal brace rod is driven to squeeze the second force unloading component downward, and the second force unloading component is also contracted under the force, and the first force unloading component and the second force unloading component cooperate with each other to reduce the shaking degree of the tower body.

[0007] Furthermore, the first diagonal support rod, the second diagonal support rod, the third diagonal support rod and the fourth diagonal support rod are all three sets, and the first unloading component and the second unloading component adopt a disc spring assembly, and flanges are respectively provided at both ends of the disc spring assembly for assembly and connection with the first diagonal support rod, the second diagonal support rod, the third diagonal support rod and the fourth diagonal support rod.

[0008] Furthermore, the transmission mechanism includes a first transmission shaft, gear one and gear two, the first transmission shaft is rotatably connected to the inside of the cabin, one end of the first transmission shaft is fixedly connected to the blade mounting frame, the other end of the first transmission shaft is fixedly connected to gear one, the gear two is rotatably set in the cabin through the second transmission shaft, the gear two is meshingly connected to the gear one, and the rear end of the second transmission shaft is coaxially fixed to the rotor of the generator.

[0009] Furthermore, the speed regulating mechanism includes a speed regulating motor, a speed regulating drive shaft, a driving bevel gear, a driven bevel gear and a mounting seat, the signal controlled end of the speed regulating motor is connected to the signal control end of the central control unit, the speed regulating motor is fixedly connected in the cabin, the speed regulating drive shaft is rotatably connected in the first transmission shaft, the speed regulating drive shaft is fixedly coaxially with the output shaft of the speed regulating motor, the end of the speed regulating drive shaft away from the speed regulating motor is extended from the first transmission shaft and fixedly connected to the driving bevel gear, the driven bevel gear is three rotatably connected in the blade mounting frame, the three driven bevel gears are simultaneously meshed with the driving bevel gear for transmission, and the end of the driven bevel gear away from the driving bevel gear is fixedly connected to the mounting seat.

[0010] Furthermore, the blade mounting mechanism consists of three sets, and a single set of blade mounting mechanism includes an assembly seat and a plug-in block, a limit block and a drive motor located in the assembly seat. The plug-in block is fixed to one end of the blade extending into the blade mounting frame. A square slot is provided in the mounting seat, and the plug-in block is plugged into the square slot. An annular limit groove is provided on the outer surface of the blade. The limit block is slidably connected in the assembly seat, and the signal controlled end of the drive motor is connected to the signal control end of the central control unit. The output shaft of the drive motor is coaxially fixedly connected with a screw, and the screw and the limit block are threadedly matched.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The stable wind power generation tower structure disclosed in the present application has a reinforcement mechanism arranged on the outer side of the lower part of the tower body. When the tower body deflects, the first diagonal brace is driven to press the first unloading component downward, and the first unloading component is forced to shrink. At the same time, the third diagonal brace is driven to press the second unloading component downward, and the second unloading component is also forced to shrink. The first unloading component and the second unloading component cooperate with each other to reduce the shaking degree of the tower body. At the same time, the first unloading component and the second unloading component in the present application adopt disc spring assemblies, which can provide rigid, small-amplitude micro-seismic buffering. Combined with the design of two triangles of the reinforcement mechanism, the structure is more stable, thereby improving the wind resistance of the tower in severe weather.

[0012] 2. For wind power equipment, adjusting the deflection angle of the cabin can not only make the windward side of the blade face the wind direction in light wind conditions to increase the blade speed, and the mechanism to achieve this is the yaw system; in extreme weather, a deflection angle is formed between the windward side of the blade and the wind direction to limit the blade speed, and the mechanism to achieve this is the speed limiter. From the above content, it can be seen that the two mechanisms of yaw and speed limit are achieved by adjusting the angle of the cabin and all the accessories (hundred-ton level) on the cabin. The power to drive hundreds of tons relies on the power provided by the generator, which consumes a lot of electricity. However, when the wind direction changes only slightly, the energy consumption cannot be underestimated.

[0013] The stable wind power tower structure disclosed in the present invention can realize the blade speed regulation function without rotating the nacelle when used in a monsoon environment where the wind direction does not change significantly. Specifically, by equipping a speed regulation mechanism, when speed increase or speed decrease is required, the speed regulation drive shaft and the driving bevel gear are driven to rotate by the speed regulation motor, and the driving bevel gear and the driven bevel gear cooperate with each other to drive the mounting seat and the blade to rotate circumferentially, thereby adjusting the direction of the windward side of the blade, and realizing the two functions of yaw and speed limit in the prior art at the same time.

[0014] 3. The stable wind power tower structure disclosed in the present invention can realize the rapid disassembly and assembly of blades by providing a blade installation mechanism, thereby improving the efficiency of blade installation and reducing the time for on-site assembly of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a stable wind power tower according to an embodiment; Figure 2 Schematic diagram of the structure of the control unit in the embodiment; Figure 3 This is a schematic diagram of the internal structure of the blade mounting frame of the embodiment; Figure 4 Schematic diagram of the structure of the transmission mechanism of the present invention; Figure 5 for Figure 3 Enlarged view of the area marked A.

[0016] In the figure: 11-ground foundation, 12-tower body, 13-central control room door, 121-support component, 122-first diagonal brace, 123-second diagonal brace, 124-third diagonal brace, 125-fourth diagonal brace, 126-compensation component, 127-first unloading component, 128-base, 129-second unloading component, 20-cabin, 21-wind direction sensor, 22-generator, 31-blade mounting frame, 32-blade, 41-first transmission shaft, 42-gear one, 43-gear two, 44-second transmission shaft, 51-speed regulating motor, 52-speed regulating drive shaft, 53-driving bevel gear, 54-driven bevel gear, 55-mounting seat, 61-assembly seat, 62-plug-in block, 63-limiting block, 64-drive motor, 65-screw, 70-central control unit. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0018] See also Figure 1-5 , this embodiment provides a stable wind power tower structure, including a tower frame and a nacelle 20, a blade mechanism, a transmission mechanism, a speed regulating mechanism, a blade mounting mechanism and a central control unit 70; The tower frame includes an above-ground foundation 11 and a tower body 12 located above the above-ground foundation 11 . A central control room door 13 is arranged at the lower part of the tower body 12 , and the tower body 12 can be entered through the central control room door 13 .

[0019] As another preferred solution of this embodiment, a reinforcement mechanism is arranged on the outer side of the lower part of the tower body 12, and the reinforcement mechanism includes a support component 121, a first diagonal brace 122, a second diagonal brace 123, a third diagonal brace 124 and a fourth diagonal brace 125; the support component 121 is located on the outer side of the tower body 12, and a compensation component 126 is arranged between the support component 121 and the tower body 12, and the compensation component 126 is used to fill the gap between the support component 121 and the tower body 12; the central axis of the first diagonal brace 122 coincides with the central axis of the second diagonal brace 123 , the upper end of the first diagonal brace 122 is hinged to the support component 121, a first unloading component 127 is arranged between the first diagonal brace 122 and the second diagonal brace 123, a base 128 is hinged to the lower end of the second diagonal brace 123, the central axis of the third diagonal brace 124 coincides with the central axis of the fourth diagonal brace 125, the upper end of the third diagonal brace 124 is hinged to the first diagonal brace 122, a second unloading component 129 is arranged between the third diagonal brace 124 and the fourth diagonal brace 125, and the lower end of the fourth diagonal brace 125 is hinged to the ground foundation 11. In this embodiment, the first diagonal brace 122, the second diagonal brace 123, the third diagonal brace 124 and the fourth diagonal brace 125 are three sets, the first unloading component 127 and the second unloading component 129 adopt a disc spring assembly, and flanges are arranged at both ends of the disc spring assembly for docking with the diagonal brace.

[0020] The nacelle 20 is rotatably connected to the top of the tower body 12 , a wind direction sensor 21 is arranged at the upper end of the nacelle 20 , a signal sending end of the wind direction sensor 21 is connected to a signal receiving end of the central control unit, and a generator 22 is arranged at the rear end of the nacelle 20 .

[0021] The blade mechanism includes a blade mounting frame 31 and blades 32. The blade mounting frame 31 is rotatably connected to the front side of the nacelle 20. The blade mounting frame 31 is transmission-connected to the rotor of the generator 22 via a transmission mechanism. There are three blades 32 uniformly arranged on the blade mounting frame 31 along the circumferential direction.

[0022] The transmission mechanism includes a first transmission shaft 41, a gear one 42 and a gear two 43. The first transmission shaft 41 is rotatably connected to the interior of the nacelle 20. One end of the first transmission shaft 41 is fixedly connected to the blade mounting frame 31. The other end of the first transmission shaft 41 is fixedly connected to the gear one 42. The gear two 43 is rotatably set in the nacelle 20 through the second transmission shaft 44. The gear two 43 is meshed with the gear one 42. The rear end of the second transmission shaft 44 is coaxially fixed to the rotor of the generator 22.

[0023] The speed regulating mechanism includes a speed regulating motor 51, a speed regulating drive shaft 52, a driving bevel gear 53, a driven bevel gear 54 and a mounting seat 55. The signal controlled end of the speed regulating motor 51 is connected to the signal control end of the central control unit 70. The speed regulating motor 51 is fixedly connected in the cabin 20. The speed regulating drive shaft 52 is rotatably connected in the first transmission shaft 41. The speed regulating drive shaft 52 is coaxially fixed with the output shaft of the speed regulating motor 51. The end of the speed regulating drive shaft 52 away from the speed regulating motor 51 is extended from the first transmission shaft 41 and is fixedly connected to the driving bevel gear 53. The driven bevel gear 54 is three rotatably connected in the blade mounting frame 31. The three driven bevel gears 54 are simultaneously meshed with the driving bevel gear 53 for transmission. The end of the driven bevel gear 54 away from the driving bevel gear 53 is fixedly connected to the mounting seat 55.

[0024] The blade mounting mechanism consists of three sets, and a single set of blade mounting mechanism includes an assembly seat 61 and a plug-in block 62, a limit block 63 and a drive motor 64 located in the assembly seat 61. The plug-in block 62 is fixed to one end of the blade 32 extending into the blade mounting frame 31, and the blade 32 is clearance-matched with the blade mounting frame 31. A square slot is provided in the mounting seat 55, and the plug-in block 62 is plugged into the square slot. An annular limit groove is provided on the outer surface of the blade 32, and the limit block 63 is slidably connected in the assembly seat 61. The signal-controlled end of the drive motor 64 is connected to the signal control end of the central control unit 70, and the output shaft of the drive motor 64 is coaxially fixedly connected with a screw 65, and the screw 65 is threadedly matched with the limit block 63.

[0025] The central control unit 70 is located inside the tower body 12 .

[0026] The present invention provides a stable wind power tower structure. When erecting, the ground foundation 11 and the underground foundation are cast on site. The working principle is as follows: Power generation process: When the stable wind power tower is used for power generation, the wind blows the blades 32, causing the blades 32 to rotate, driving the blade mounting frame 31 to rotate, driving the first transmission shaft 41 to rotate, causing the gear 1 42 to rotate, driving the gear 2 43 to rotate, driving the rotor of the generator 22 to rotate, and the generator 22 generates current and transmits it to the external energy storage device; Wind resistance: In bad weather, the tower body 12 may be slightly shaken or swung slightly due to the wind. When the tower body 12 deviates, the first diagonal brace 122 is driven to press the first unloading component 127 downward, and the first unloading component 127 is forced to shrink. At the same time, the third diagonal brace 124 is driven to press the second unloading component 129 downward, and the second unloading component 129 is also forced to shrink. The first unloading component 127 and the second unloading component 129 cooperate with each other to buffer, thereby reducing the shaking of the tower body 12. At the same time, the reinforcement mechanism presents a stable structure of two triangles, which is more stable, so that the tower body 12 remains stable; Speed ​​regulation: The wind direction sensor 21 detects the wind direction and transmits the wind direction data to the central control unit 70. The central control unit 70 controls the speed regulating motor 51 to start. The output shaft of the speed regulating motor 51 rotates to drive the speed regulating drive shaft 52 to rotate, so that the driving bevel gear 53 rotates, and then drives the driven bevel gear 54 to rotate, drives the mounting seat 55 to rotate, and drives the plug-in block 62 to rotate, and drives the blade 32 to rotate, thereby adjusting the direction of the windward side of the blade 32, reducing or increasing the resistance of the blade 32, and ensuring the normal and stable operation of the equipment.

[0027] Blade disassembly and assembly: When the blade 32 is worn and needs maintenance or replacement, the central control unit 70 is controlled to start the drive motor 64. The output shaft of the drive motor 64 rotates to drive the screw 65 to rotate, so that the limit block 63 moves backward and disengages from the annular limit groove. At this time, the blade 32 is pulled outward to be disassembled.

[0028] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A stable wind power tower structure, characterized in that: It includes a tower and a nacelle, a blade mechanism, a transmission mechanism, a speed regulating mechanism, a blade mounting mechanism and a central control unit; The tower frame includes an above-ground foundation and a tower body located above the above-ground foundation, and a central control room door is arranged at the lower part of the tower body; The nacelle is rotatably connected to the top of the tower body, a wind direction sensor is arranged at the upper end of the nacelle, a signal sending end of the wind direction sensor is connected to a signal receiving end of a central control unit, and a generator is arranged at the rear end of the nacelle; The blade mechanism comprises a blade mounting frame and blades, wherein the blade mounting frame is rotatably connected to the front side of the nacelle, the blade mounting frame is transmission-connected to the rotor of the generator through a transmission mechanism, and the blades are three evenly arranged on the blade mounting frame along the circumferential direction; The central control unit is located in the tower body.

2. A stable wind power tower structure according to claim 1, characterized in that: A reinforcement mechanism is arranged on the outer side of the lower part of the tower body, and the reinforcement mechanism comprises a support component, a first diagonal brace, a second diagonal brace, a third diagonal brace and a fourth diagonal brace; the support component is located on the outer side of the tower body, and a compensation component is arranged between the support component and the tower body, and the compensation component is used to fill the gap between the support component and the tower body; the central axis of the first diagonal brace coincides with the central axis of the second diagonal brace, the upper end of the first diagonal brace is hinged to the support component, a first force unloading component is arranged between the first diagonal brace and the second diagonal brace, and the lower end of the second diagonal brace is hinged A base is connected, the central axes of the third diagonal support rod and the fourth diagonal support rod coincide with each other, the upper end of the third diagonal support rod is hinged to the first diagonal support rod, a second force unloading component is arranged between the third diagonal support rod and the fourth diagonal support rod, and the lower end of the fourth diagonal support rod is hinged to the ground foundation; when the tower body is offset, the first diagonal support rod is driven to squeeze the first force unloading component downward, and the first force unloading component is forced to shrink, and at the same time, the third diagonal support rod is driven to squeeze the second force unloading component downward, and the second force unloading component is also forced to shrink, and the first force unloading component and the second force unloading component cooperate with each other to reduce the shaking degree of the tower body.

3. A stable wind power tower structure according to claim 2, characterized in that: The first diagonal brace, the second diagonal brace, the third diagonal brace and the fourth diagonal brace are all three sets, and the first unloading component and the second unloading component adopt disc spring assemblies, and flanges are respectively provided at both ends of the disc spring assemblies for assembly and connection with the first diagonal brace, the second diagonal brace, the third diagonal brace and the fourth diagonal brace.

4. A stable wind power tower structure according to claim 2, characterized in that: The transmission mechanism includes a first transmission shaft, gear 1 and gear 2, the first transmission shaft is rotatably connected to the inside of the cabin, one end of the first transmission shaft is fixedly connected to the blade mounting frame, the other end of the first transmission shaft is fixedly connected to gear 1, the gear 2 is rotatably set in the cabin through the second transmission shaft, the gear 2 is meshed with the gear 1, and the rear end of the second transmission shaft is coaxially fixed to the rotor of the generator.

5. A stable wind power tower structure according to claim 4, characterized in that: The speed regulating mechanism includes a speed regulating motor, a speed regulating drive shaft, a driving bevel gear, a driven bevel gear and a mounting seat. The signal controlled end of the speed regulating motor is connected to the signal control end of the central control unit. The speed regulating motor is fixedly connected in the cabin. The speed regulating drive shaft is rotatably connected in the first transmission shaft. The speed regulating drive shaft is coaxially fixed with the output shaft of the speed regulating motor. The end of the speed regulating drive shaft away from the speed regulating motor is extended from the first transmission shaft and is fixedly connected to the driving bevel gear. The driven bevel gears are three rotatably connected in the blade mounting frame. The three driven bevel gears are simultaneously meshed with the driving bevel gear for transmission. The end of the driven bevel gear away from the driving bevel gear is fixedly connected to the mounting seat.

6. A stable wind power tower structure according to claim 5, characterized in that: The blade mounting mechanism consists of three sets. A single set of blade mounting mechanism includes an assembly seat and a plug-in block, a limit block and a drive motor located in the assembly seat. The plug-in block is fixed to one end of the blade extending into the blade mounting frame. A square slot is provided in the mounting seat. The plug-in block is plugged into the square slot. An annular limit groove is provided on the outer surface of the blade. The limit block is slidably connected in the assembly seat. The signal controlled end of the drive motor is connected to the signal control end of the central control unit. The output shaft of the drive motor is coaxially fixedly connected with a screw, and the screw and the limit block are threadedly matched.

Images