A wind turbine

Abstract

The present invention discloses a wind turbine, comprising: a nacelle part and a connection part; the nacelle part includes a nacelle bracket, a generator and a wind wheel, and the wind wheel drives the generator to operate; the connection part is used to connect the nacelle bracket and the tower, and includes a damping adjustment turntable, and the damping adjustment turntable includes a butt joint disc and a receiving disc which are sleeved; a groove is provided at the bottom of the receiving disc, and a spring pin corresponding to the groove is provided on the butt joint disc. When the butt joint disc is sleeved on the receiving disc, the spring pin is located in the groove, and the damping when the nacelle part rotates is adjusted by adjusting the elasticity of the spring pin. The pitch mechanism, yaw mechanism and their control devices of the traditional wind turbine are cancelled, the wind turbine is simplified, and at the same time, mechanical stability control devices such as a damping adjustment turntable and a tail fin are designed to improve the safety and reliability of the wind turbine, with a simple structure, convenient maintenance, and the cost of the wind turbine is reduced to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to a wind turbine generator. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, wind turbine generators generally adopt the method of the wind wheel facing the wind upwind, that is, looking from the wind direction, the wind wheel is in front of the tower. For large wind turbine generators, almost all adopt this method. To ensure that the wind wheel always faces the oncoming wind, the wind turbine generator must have a yaw control motor with a relatively large power and a servo control system. In addition, to ensure the safety of the wind turbine during strong winds, it is also necessary to control the direction of the blades of the wind turbine. The blades need a pitch mechanism, and its control device is called a pitch control system. However, due to the existence of these two basic functions and their control systems, the structure of the wind turbine generator is relatively complex, the professionalism is enhanced, the weight of the nacelle is greatly increased, and the cost of the entire wind turbine is also greatly increased. Summary of the Invention

[0004] To solve the above problems, the present invention proposes a wind turbine generator, which cancels the pitch mechanism, yaw mechanism and their control devices of the traditional wind turbine, simplifies the wind turbine generator, and at the same time designs mechanical stability control devices such as a damping adjustment turntable and a tail fin to improve the safety and reliability of the wind turbine, with a simple structure, easy to maintain, and minimizing the cost of the wind turbine to the greatest extent.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a wind turbine generator, including: a head part and a connecting part; the head part includes a head support, a generator disposed upwind of the head support, and a wind wheel disposed downwind of the head support, and the rotation of the wind wheel drives the operation of the generator.

[0007] The connecting part is used for connecting the head support and the tower, and includes a damping adjustment turntable, and the damping adjustment turntable includes a docking plate and a receiving plate. The docking plate is disposed on the head support, and the receiving plate is disposed on the tower so that the docking plate sleeves the receiving plate.

[0008] A groove is provided at the bottom of the receiving plate, and a spring pin corresponding to the groove is provided on the docking plate. When the docking plate sleeves the receiving plate, the spring pin is in the groove, and the damping when the head part rotates is adjusted by adjusting the elasticity of the spring pin. When the swing torque of the wind wheel exceeds the resistance of the spring pin, the spring pin disengages from the groove, and the head part rotates.

[0009] As an alternative embodiment, the wind wheel includes a wind wheel rotating shaft and blades provided on the wind wheel rotating shaft. The wind wheel rotating shaft is provided on the nose support. The wind wheel drives the generator rotor through the wind wheel rotating shaft. The winding coils of the generator rotor and the stator generate electromagnetic induction due to rotation to generate electricity.

[0010] As an alternative embodiment, a wind wheel brake hoop is provided at the connection between the wind wheel rotating shaft and the nose support. By tightening the wind wheel brake hoop, the wind wheel rotating shaft is tightened to stop the wind wheel from rotating.

[0011] As an alternative embodiment, a tail rod is installed behind the wind wheel, and a tail fin is installed at the other end of the tail rod through a slip ring. Gravity balls are provided on the tail fin, and the gravity of the gravity balls and the wind speed determine the swing amplitude of the tail fin.

[0012] As an alternative embodiment, the connection part further includes a nose lock. Locking lugs are provided on the outer edge of the docking plate. The upper end of the nose lock is connected to the locking lugs, and the lower end is hung on the bottom of the receiving plate to prevent the nose part from detaching.

[0013] As an alternative embodiment, the connection part further includes a nose brake hoop. The bottom of the nose support is provided in the tower barrel at the top of the tower through a nose rotating shaft. A nose brake hoop is provided in the tower barrel and on the side wall of the nose rotating shaft. By tightening the nose brake hoop, the nose rotating shaft is tightened to stop the nose part from rotating.

[0014] As an alternative embodiment, the cable of the generator is connected to the cable in the tower through a cable connection contact.

[0015] As an alternative embodiment, the cable connection contact includes a moving contact and a static contact. The static contact includes three conductive rings and a central conductive disk. The conductive rings are respectively connected to the three-phase wires of the generator, and the central conductive disk is connected to the nose lightning protection wire and the ground wire. The top of the moving contact is elastically docked with the three conductive rings and the central conductive disk of the static contact respectively, and the bottom is led to the ground.

[0016] As an alternative embodiment, the three conductive rings are nested with each other, and the central conductive disk is provided in the center.

[0017] As an alternative embodiment, the moving contact is four metal good conductor convex heads that are insulated from each other, have a certain distance, and have elastic supports.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The present invention provides a wind turbine, which eliminates the pitch mechanism, yaw mechanism and their control devices of traditional wind turbines, simplifies the wind turbine, and only retains one electrical device, namely the generator, at the nacelle. Meanwhile, mechanical stability control devices such as a damping adjustment turntable and a tail fin are designed to improve the safety and reliability of the wind turbine. The structure is simple and easy to maintain, and the cost of the wind turbine is reduced to the greatest extent.

[0020] A wind turbine provided by the present invention, through a downwind self-stabilizing structure such as a wind wheel and a tail fin, enables the wind turbine to automatically face the wind without external force assistance, simplifies the structure of the wind turbine, reduces the weight of the wind turbine, and correspondingly reduces the requirement for the support strength of the tower. The wind turbine's mechanism of rotating with the wind without control makes the most of wind energy resources.

[0021] A wind turbine provided by the present invention completes the docking between the nacelle part and the tower through a damping adjustment turntable, further enhancing the windward stability of the wind wheel under wind sway disturbance.

[0022] A wind turbine provided by the present invention, through the structure of cable connection contacts, while meeting the electrical connection requirements of the wind turbine, ensures the free rotation of the nacelle in the horizontal direction, has no rotation dead angle, and has no impact damage to the tower body when the wind turbine shakes its head in strong winds.

[0023] Advantages of additional aspects of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0025] Figure 1 Schematic diagram of a wind turbine provided for Embodiment 1 of the present invention;

[0026] Figure 2 Cross-sectional view of a wind turbine provided for Embodiment 1 of the present invention;

[0027] Wherein, 1. Generator, 2. Blade, 3. Tail fin, 4. Slip ring and gravity ball, 5. Wind turbine brake hoop, 6. Nacelle support, 7. Damping adjustment turntable, 8. Nacelle brake hoop, 9. Nacelle lock, 10. Cable connection contact. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present invention will be further described below in conjunction with the drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that the terms "include" and "have" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0032] Example 1

[0033] like Figure 1-2 As shown, this embodiment provides a wind turbine, comprising: a head part and a connecting part; the head part rotates with the wind, specifically comprising a head bracket 6, a generator 1 arranged upwind of the head bracket 6, and a wind wheel arranged downwind of the head bracket 6; the rotation of the wind wheel drives the generator 1 to move, and the head bracket 6 can rotate freely in all directions.

[0034] In this embodiment, the wind wheel includes a wind wheel shaft and blades 2 arranged on the wind wheel shaft, and the wind wheel shaft is arranged on the head bracket 6; the wind wheel drives the permanent magnetic material generator rotor through the wind wheel shaft, and the permanent magnetic rotor of the generator and the winding coil on the stator generate electromagnetic induction due to rotation to generate electricity.

[0035] In this embodiment, a wind wheel brake hoop 5 is provided at the connection between the wind wheel shaft and the head bracket 6. The wind wheel brake hoop 5 is tightened to hold the wind wheel shaft tightly, so that the wind wheel stops rotating.

[0036] In this embodiment, a tail rod is installed behind the wind rotor, and a tail wing 3 is provided at the other end of the tail rod. The tail wing 3 is a cross blade with drooping gravity and can swing. Through the downwind self-stabilizing structure of the wind rotor and the tail wing, the wind turbine automatically faces the wind without external assistance, which simplifies the wind turbine structure, reduces the weight of the wind turbine, and also reduces the requirements for the tower support strength.

[0037] As an optional implementation, the tail wing 3 is hung on the tail rod through a slip ring, which adds stable balancing torques in the horizontal and vertical directions to the wind turbine, making the wind wheel more stable when facing the wind.

[0038] As an optional implementation, a gravity ball is provided on the tail wing 3, and the swing amplitude of the tail wing 3 swinging left and right depends on the gravity of the suspended gravity ball and the wind speed.

[0039] In this embodiment, both ends of the head bracket 6 where the generator and the wind wheel are mounted adopt triangular support structures to improve the stress strength of the head.

[0040] As an optional implementation, the triangular support structure for mounting one end of the generator adopts a bearing structure embedded in a metal tube, and cables are laid inside the supporting steel tube on the oblique side of the triangular support structure to hide and protect the cables of the generator.

[0041] In this embodiment, the connecting portion is used to connect the head bracket and the tower, the bottom end of the head bracket is connected to the tower, and the connecting portion is the center of gravity of the entire head.

[0042] In this embodiment, the connecting part includes a damping adjustment dial 7, which includes an upper docking disc and a lower receiving disc. The docking disc and the receiving disc are two discs with different diameters. The diameter of the docking disc is larger than the diameter of the receiving disc, and the docking disc is sleeved on the receiving disc.

[0043] Specifically, the receiving plate is mounted on the tower, with its opening facing the bottom of the head bracket 6, and the docking plate is mounted on the bottom of the head bracket 6, with its opening facing the tower, so that the docking plate is sleeved with the receiving plate;

[0044] The bottom of the receiving plate is provided with a uniform and smooth semicircular groove, and the docking plate is provided with a spring pin corresponding to the groove one by one. When the docking plate is sleeved with the receiving plate, the spring pin is in the groove;

[0045] A bolt is provided at the top of the spring pin. The elastic force of the spring pin can be adjusted by adjusting the bolt on the spring pin. The elastic force is used to adjust the damping of the rotating part of the machine head.

[0046] Specifically, when the wind wheel has a small horizontal swing, the spring pin in the groove blocks the wind wheel from swinging. When the horizontal swing torque of the wind wheel exceeds all the resistance of the spring pin, the spring pin disengages from the groove and the nose part rotates. The damping effect further enhances the windward stability of the wind wheel under wind swing disturbance.

[0047] As an optional implementation, the damping adjustment dial 7 is filled with lubricating oil.

[0048] In this embodiment, the connection part further includes a nose brake hoop 8. The bottom of the nose bracket is arranged in the tower barrel at the top of the tower through a nose rotating shaft, and the nose rotating shaft passes through the inner ring of the damping adjustment turntable 7. A nose brake hoop 8 is arranged on the side wall of the nose rotating shaft inside the tower barrel. Similar to the wind wheel brake hoop 5, the nose brake hoop 8 is tightened by hand from outside the tower barrel to hold the nose rotating shaft tightly, so that the nose part stops rotating.

[0049] As an alternative embodiment, the nose rotating shaft is a tubular inner shaft.

[0050] As an alternative embodiment, the tower barrel is a metal barrel.

[0051] In this embodiment, the connection part further includes a nose lock 9. A lock lug is arranged on the outer edge of the damping adjustment turntable 7. The nose lock 9 is an arcuate hanging buckle. The upper end is connected to the lock lug of the damping adjustment turntable 7 with a movable pin, and the lower end hangs on the bottom of the receiving plate under the action of its own gravity to prevent the nose part from separating from the tower barrel. The arcuate hanging buckle rotates with the nose. Since there is a certain gap between it and the bottom of the receiving plate (a part of the tower barrel), it does not prevent the nose from rotating.

[0052] In this embodiment, the cable of the generator extends and is connected to the inside of the tower barrel through the metal pipe on the hypotenuse of the triangular support structure, so as to be connected to the cable inside the tower barrel. The cable connection contact 10 connects the cables of the generator and the tower; the cable connection contact 10 includes a moving contact and a static contact;

[0053] Among them, the static contact includes three conductive rings and a central conductive disc. The three conductive rings are nested with each other, and the central conductive disc is arranged in the center; the conductive rings are respectively connected to the three-phase wires A, B, and C of the generator, and the central conductive disc is connected to the nose lightning protection wire and the ground wire G.

[0054] As an alternative embodiment, the conductive ring is a metal ring or a carbon ring.

[0055] As an alternative embodiment, the conductive rings are insulated from each other.

[0056] As an alternative embodiment, the static contact is made of an insulating material and rotates with the nose part.

[0057] The moving contact includes four. The tops of the four moving contacts are elastically butted against the four rings on the static contact respectively, and the lower parts are led to the ground through cables.

[0058] As an alternative embodiment, the moving contact is four metal good conductors with convex heads that are insulated from each other, have a certain distance, have elastic supports, and can pass through large currents.

[0059] In this embodiment, the structure with the upper disc of the moving and static contacts protruding downward not only maintains the continuity of the A, B, and C phase conductors of the generator and the grounding wire G in the tower, but also prevents electrical short - circuit accidents caused by the shedding of metal powder during the rotational sliding of the contacts.

[0060] Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made without creative efforts by those skilled in the art are still within the protection scope of the present invention.

Claims

1. A wind turbine, characterized in that, include: A head part and a connecting part; the head part includes a head bracket, a generator arranged at the upwind position of the head bracket, and a wind wheel arranged at the downwind position of the head bracket, and the rotation of the wind wheel drives the generator to move; The connecting part is used for connecting the head bracket and the tower, and includes a damping adjustment dial, and the damping adjustment dial includes a docking plate and a receiving plate, the docking plate is installed on the head bracket, and the receiving plate is installed on the tower, so that the docking plate is sleeved with the receiving plate; Specifically, the receiving plate is installed on the tower, with its opening facing the bottom of the head bracket, and the docking plate is installed at the bottom of the head bracket, with its opening facing the tower, so that the docking plate is sleeved with the receiving plate; The bottom of the receiving plate is provided with a uniform and smooth semicircular groove, and the docking plate is provided with a spring pin corresponding to the groove one by one. When the docking plate is sleeved with the receiving plate, the spring pin is in the groove; A bolt is provided at the top of the elastic pin. The elastic force of the elastic pin can be adjusted by adjusting the bolt on the elastic pin. The elastic force is used to adjust the damping of the rotating part of the machine head. The bottom of the receiving plate is provided with a groove, and the docking plate is provided with an elastic pin corresponding to the groove. When the docking plate is sleeved with the receiving plate, the elastic pin is in the groove. By adjusting the elastic force of the elastic pin, the damping of the head part during rotation can be adjusted. When the wind wheel swing torque exceeds the elastic pin resistance, the elastic pin is separated from the groove, and the head part rotates. A tail rod is installed behind the wind rotor, and a tail wing is installed at the other end of the tail rod through a slip ring. A gravity ball is provided on the tail wing, and the gravity of the gravity ball and the wind speed determine the swing amplitude of the tail wing; The connecting part also includes a machine head lock, and a lock hook is provided on the outer edge of the docking plate. The upper end of the machine head lock is connected to the lock hook, and the lower end is hung on the bottom of the receiving plate to prevent the machine head part from detaching.

2. A wind turbine according to claim 1, characterized in that, The wind wheel comprises a wind wheel shaft and blades arranged on the wind wheel shaft, and the wind wheel shaft is arranged on the head bracket; the wind wheel drives the generator rotor through the wind wheel shaft, and the generator rotor and the winding coil of the stator generate electromagnetic induction due to rotation to generate electricity.

3. A wind turbine according to claim 2, characterized in that, A wind wheel brake hoop is provided at the connection between the wind wheel shaft and the head bracket. By tightening the wind wheel brake hoop, the wind wheel shaft is tightly held to stop the wind wheel from rotating.

4. A wind turbine according to claim 1, characterized in that, The connecting part also includes a machine head brake hoop. The bottom of the machine head bracket is arranged in the tower tube at the top of the tower through the machine head rotating shaft. A machine head brake hoop is provided in the tower tube and on the side wall of the machine head rotating shaft. By tightening the machine head brake hoop to hold the machine head rotating shaft, the machine head part stops rotating.

5. A wind turbine as claimed in claim 1, wherein, The cable of the generator is connected to the cable in the tower through a cable connection contact.

6. A wind turbine according to claim 5, characterized in that, The cable connection contact includes a moving contact and a stationary contact; the stationary contact includes three conductive rings and a central conductive disk, the conductive rings are respectively connected to the three-phase wires of the generator, the central conductive disk is connected to the machine head lightning protection wire and the grounding wire, the top of the moving contact is elastically connected to the three conductive rings and the central conductive disk of the stationary contact, and the bottom is led to the ground.

7. A wind turbine according to claim 6, characterized in that, The three conductive rings are nested with each other, and a central conductive disk is arranged at the center.

8. A wind turbine according to claim 6, characterized in that, The moving contacts are four mutually insulated, spaced at a certain distance and elastically supported metal good conductor protrusions.

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