TWI721351B - Speed limit mechanism of wind electricity generation appratus - Google Patents

Abstract

The present disclosure discloses a speed limit mechanism of a wind electricity generation apparatus. The speed limit mechanism includes an inner case portion, an outer case portion, a plurality of swing arms pivotally connected to the inner case portion, and a metal ring fixed to the outer case portion. The inner case portion and the outer case portion jointly and surroundingly define an accommodating space that receives the swing arms and the metal ring, and the inner case portion is configured to detachably fastened to a rotatable shaft. Each of the swing arms has a magnetic portion movable relative to the inner case portion from an initial position to a speed limit position. When the magnetic portion of each of the swing arms is located at the speed limit position, the magnetic portion at least partially covers the magnetic ring, so that the magnetic ring generates an eddy current for limiting the rotating speed of the rotatable shaft.

Description

Speed limiting mechanism of wind power generation equipment

The invention relates to a power generation equipment, in particular to a speed limiting mechanism of a wind power generation equipment.

The existing wind power generation equipment (such as horizontal axis wind power generation equipment) uses a plurality of lift-type blades to withstand wind power as a driving source for power generation. Among them, when the existing wind power generation equipment is facing high wind speeds, its internal components are likely to be damaged due to the excessively high rotation speed. Therefore, most of the existing wind power generation equipment uses electronic brakes to reduce the rotation speed. However, the above-mentioned electronic brakes can only make wind power generation equipment suitable for sudden high wind speeds, but cannot make them used in environments with continuous high wind speeds.

Therefore, the inventor believes that the above-mentioned shortcomings can be improved, and with great concentration of research and the application of scientific principles, we finally propose an invention with reasonable design and effective improvement of the above-mentioned shortcomings.

The embodiment of the present invention is to provide a speed limiting mechanism for wind power generation equipment, which can effectively improve the possible defects of the existing wind power generation equipment.

The embodiment of the present invention discloses a speed limiting mechanism for wind power generation equipment, comprising: a shell module, including an inner shell part and an outer shell part, the inner shell part and the outer shell part jointly enclose an accommodating space, And the inner shell can be used to be detachably mounted on a rotating shaft; N swing structures are located in the accommodating space and each includes at least one swing arm, N is a positive integer greater than 1, each At least one of the swing arms of each of the swing structures includes a pivot part and a magnetic part; In at least one of the swing arms of the swing structure, the pivot portion is pivotally connected to the inner shell portion, so that the magnetic portion can be caused by a centrifugal force generated by the rotation shaft during rotation. Move from an initial position to a speed limit position relative to the inner shell part; and a metal ring located in the accommodating space and fixed to the outer shell part; wherein, when each of the swing structures When the magnetic portion of at least one of the swing arms is located at the speed limit position, the magnetic portion at least partially covers the metal ring in a direction parallel to the rotating shaft, so as to form the metal ring There is an eddy current capable of limiting the rotation speed of the rotating shaft.

In summary, the speed limiting mechanism for wind power generation equipment disclosed in the embodiments of the present invention can generate eddy currents on the metal ring to slow down the acceleration of the rotation speed of the rotating shaft, so that the wind power generation equipment can be applied In an environment with continuous high wind speeds.

Furthermore, the speed-limiting mechanism can be applied to the rotating shaft of the existing wind power generation equipment, so that the existing wind power generation equipment can be made by adding the above-mentioned speed-limiting mechanism without major structural changes. It can be used in the environment of continuous high wind speed.

In order to further understand the features and technical content of the present invention, please refer to the following detailed descriptions and drawings about the present invention, but these descriptions and drawings are only used to illustrate the present invention, and do not make any claims about the protection scope of the present invention. limit.

1000: Wind power equipment

100: Speed limit mechanism

1: Shell module

11: Inner shell

111: holding tank

12: Shell

12a: sub-shell

2: swing structure

21: swing arm

211: Pivot

212: Magnetic Department

213: first end

214: second end

22: connecting rod

3: metal ring

31: sub-ring body

4: Elastic element

5: Outer magnet

6: Torsion spring

61: Elastic part

62: The first positioning part

63: The second positioning part

7: Inner magnet

200: Rotating shaft

300: generator set

σ: included angle

C: central axis

S: accommodating space

Fig. 1 is a three-dimensional schematic diagram of a wind power generation equipment according to the first embodiment of the present invention.

Fig. 2 is an exploded schematic diagram of Fig. 1.

Fig. 3 is an exploded schematic diagram of the speed limiting mechanism in Fig. 2.

Fig. 4 is an exploded schematic view of the speed limiting mechanism in Fig. 2 from another perspective.

Fig. 5 is a schematic cross-sectional view of Fig. 1 along the section line V-V.

Figure 6 is a view of the wind power generation equipment in the first embodiment of the present invention during the rotation of the rotating shaft Schematic cross-sectional view.

Fig. 7 is a schematic partial cross-sectional view of a wind power generation equipment according to the first embodiment of the present invention.

Fig. 8 is an enlarged schematic diagram of the part VIII of Fig. 7.

Fig. 9 is a three-dimensional schematic diagram of a wind power generation equipment according to the second embodiment of the present invention.

Fig. 10 is a three-dimensional schematic diagram of a wind power generation equipment according to the third embodiment of the present invention.

FIG. 11 is an enlarged schematic diagram of the part XI in FIG. 10.

Fig. 12 is a schematic cross-sectional view of a wind power generation equipment according to the fourth embodiment of the present invention.

Please refer to Figures 1 to 12, which are embodiments of the present invention. It should be noted that the relevant quantities and appearances mentioned in the accompanying drawings in this embodiment are only used to specifically illustrate the implementation of the present invention. In order to understand the content of the present invention, it is not used to limit the protection scope of the present invention.

[Example 1]

As shown in Figures 1 to 8, this embodiment discloses a speed limiting mechanism 100 for wind power generation equipment 1000. The wind power generation equipment 1000 to which the above speed limiting mechanism 100 is applied may be a horizontal axis wind power generation equipment, but the present invention does not This is limited. Furthermore, the structural design principle of the wind power generation equipment 1000 to which the speed limiting mechanism 100 of this embodiment is applied is completely different from that of the hydropower equipment, so the structure of the hydropower equipment is difficult to provide technical enlightenment or motivation related to this embodiment.

As shown in FIGS. 1 to 4, the wind power generation equipment 1000 includes a generator set 300 and a speed limiting mechanism 100 detachably installed in the generator set 300. Wherein, the generator set 300 includes a rotating shaft 200, and the above-mentioned speed limiting mechanism 100 is installed on the rotating shaft 200. The various components of the wind power generation equipment 1000 can be adjusted or omitted according to actual design requirements, and the present invention is not limited herein.

The speed limiting mechanism 100 includes a housing module 1, N swing structures pivotally connected to the housing module 1, a metal ring 3 fixed to the housing module 1, and a metal ring 3 connected to the above N The multiple elastic elements 4 of the swing structure 2 and the multiple outer magnets 5 mounted on the inner shell portion 11. In this embodiment, N is 5 for illustration, but the present invention is not limited to this; that is, in other embodiments not shown in the present invention, N may be a positive integer greater than 1.

The housing module 1 includes an inner shell portion 11 and an outer shell portion 12, and the inner shell portion 11 and the outer shell portion 12 jointly surround an accommodating space S for the N oscillating structures 2 and The metal ring 3 is set in it. Furthermore, the inner shell portion 11 can be used to be detachably mounted on the rotating shaft 200, and the installation method (such as: shaft hole interference fit) between the inner shell portion 11 and the rotating shaft 200 can be based on The design needs to be adjusted and changed, and the present invention is not limited here.

Furthermore, the inner shell portion 11 is substantially annular, and a central axis C of the inner shell portion 11 falls on the rotating shaft 200, and the inner shell portion 11 is formed with a shape on its outer surface. A holding groove body 111 in an annular shape, and the notch of the holding groove body 111 faces a direction away from the rotating shaft 200. The outer shell portion 12 is substantially a cover and can be detachably assembled to the inner shell portion 11.

It should be noted that the speed limiting mechanism 100 in this embodiment is preferably detachably mounted on the rotating shaft 200, so it is not any speed limiting mechanism detachably mounted in the rotating shaft 200 ( For example, the speed limiting mechanism installed in the generator set 300 is not the speed limiting mechanism 100 referred to in this embodiment.

Since the multiple swing structures 2 of this embodiment are substantially the same, for ease of description, the specific aspect of the single swing structure 2 will be introduced first. Wherein, the swing structure 2 includes two swing arms 21 and a connecting rod 22 connecting the two swing arms 21; that is, the two swing arms 21 can swing synchronously through the connecting rod 22. Furthermore, the two swing arms 21 of the swing structure 2 are preferably arranged in mirror symmetry with respect to the connecting rod 22, but the present invention is not limited to this. For example, in other embodiments not shown in the present invention, the swing structure 2 may also include at least A swing arm 21.

Furthermore, each swing arm 21 includes a pivot part 211 and a magnetic part 212 located on opposite sides, and the connecting rod 22 is connected between the pivot parts 211 of the two swing arms 21. Furthermore, each swing arm 21 in this embodiment further includes a first end 213 and a second end 214 located on the two outer sides of the magnetic portion 212 and the pivot portion 211 opposite to each other. That is, as shown in FIG. 4, the first end portion 213 and the pivotal portion 211 are located on the right side of the swing arm 21, and the magnetic portion 212 and the second end portion 214 are located on the left side of the swing arm 21. To put it another way, the swing structure 2 of this embodiment is substantially U-shaped after the first end 213 is deducted.

The pivot portion 211 of each swing arm 21 is pivotally connected to the inner shell portion 11 (for example, the two pivot portions 211 of the swing structure 2 are pivotally connected to the two inner side walls of the holding groove 111), and the metal ring 3 is fixed to the outer shell part 12, so that the magnetic part 212 of each swing arm 21 can move from an initial position relative to the inner shell part 11 through a centrifugal force generated by the rotation shaft 200 during rotation. Such as: Figure 5) Move to a speed limit position (such as: Figure 6). It should be noted that the N swing structures 2 are arranged rotationally symmetrically with respect to the central axis C, and are respectively located at the two pivoting portions 211 in any two adjacent swing structures 2, which are relative to the center axis C. The rotating shaft 200 forms an included angle σ, and the included angle σ is 360/N degrees.

As shown in FIG. 5, when the magnetic portion 212 of each swing arm 21 is located at the initial position, the swing structure 2 is approximately located in the holding groove 111 of the inner shell portion 11. Furthermore, as shown in FIG. 6, when the magnetic portion 212 of each swing arm 21 is located at the speed limit position, the magnetic portion 212 of each swing arm 21 runs in a direction parallel to the rotating shaft 200 (e.g., the central axis C ) At least partially covering the metal ring 3, so that an eddy current that can limit the rotation speed of the rotating shaft 200 is formed on the metal ring 3.

Accordingly, according to the principle of eddy current braking, the metal ring 3 acts as a magnetic induction body, and the speed limiting mechanism 100 can rotate relative to the metal ring 3 through the magnetic field of the magnetic part 212, and an eddy current is generated on the metal ring 3 , In order to produce the magnetic part 212 The tangential component force (that is, the braking force) in the opposite direction of movement further slows the acceleration of the rotation speed of the rotating shaft 200, so that the wind power generation device 1000 can be applied to the environment of continuous high wind speed. Furthermore, the speed-limiting mechanism 100 can be applied to the rotating shaft of an existing wind power generation equipment, so that the existing wind power generation equipment can be installed by adding the above-mentioned speed-limiting mechanism 100 without major structural changes. It can be used in the environment of continuous high wind speed.

In addition, since the magnitude of the above-mentioned eddy current can affect the degree of slowing down of the rotation speed of the rotating shaft 200, and the magnitude of the eddy current can be determined according to the interaction area of the metal ring 3 and the magnetic part 212 in the direction parallel to the rotating shaft 200 Therefore, the speed limiting mechanism 100 of this embodiment may also include the following components to facilitate reaching a preset eddy current value under a specific wind speed environment, but the present invention is not limited to this.

As shown in FIGS. 5 and 6, the plurality of swing structures 2 are connected into one body by the plurality of elastic elements 4 (such as tension springs), so that the plurality of swing structures 2 can be substantially the same when subjected to centrifugal force. The swing amplitude. In this embodiment, the first end 213 and the second end 214 that are adjacent to each other but belong to different swing structures 2 are connected by one elastic element 4, but the present invention is not limited to this.

Furthermore, as shown in FIGS. 7 and 8, the plurality of outer magnets 5 are installed on the inner shell portion 11 (for example, the two inner side walls of the holding tank 111), and each swing structure 2 is in position Corresponding to two outer magnets 5. However, in other embodiments not shown in the present invention, each of the above-mentioned swing structures 2 may also correspond to at least two outer magnets 5 in position.

Furthermore, in each swing structure 2 and the corresponding two outer magnets 5, the corresponding two outer magnets 5 are respectively located at the opposite magnetic parts 212 of the two swing arms 21 in the initial position. Two outer sides, and can attract each other. Accordingly, each oscillating structure 2 can attract each other through its magnetic portion 212 and the corresponding outer magnet 5, so that the oscillating structure 2 can be controlled to swing outwards under a specific wind speed environment, and thus can be applied to different The wind speed demand.

In addition, as shown in FIGS. 3 and 4, in order to facilitate the production and manufacture of the wind power generation equipment 1000 of this embodiment, the shell portion 12 may include two sub-shells 12a assembled with each other, and the metal ring 3 Contains two sub-rings 31 respectively fixed to the two sub-housings 12a, so as to facilitate the direct production of one sub-housing 12a and the sub-rings 31 thereon, and then the two sub-housings 12a and the sub-rings 31 The upper two sub-rings 31 are assembled with each other to form the shell portion 12 and the metal ring 3, but the present invention is not limited to this. For example, in other embodiments not shown in the present invention, the housing portion 12 and the metal ring 3 may each be an integrally formed one-piece component.

In this embodiment, the two ends of any one sub-ring 31 are respectively connected to the two ends of the other sub-ring 31; that is, the metal ring 3 is composed of two separate sub-rings 31. However, the two sub-rings 31 are connected to each other to form a ring structure.

The speed limiting mechanism 100 is used to (detachably) install on the outside of the generator set 300 in this embodiment. Wherein, the housing part 12 of the speed limiting mechanism 100 is fixed to the generator set 300 (for example, the housing or the stator assembly of the generator set 300), and the fixing method between the housing part 12 and the generator set 300 can be modified according to design requirements. The adjustment and changes are not limited in the present invention. For example, in other embodiments not shown in the present invention, when the shell of the generator set 300 is fixed to a bracket, the bracket can be regarded as an extension of the shell of the generator set 300, and the above limitations The housing part 12 of the speed mechanism 100 may be fixed to the bracket.

Furthermore, the inner shell portion 11 of the speed limiting mechanism 100 is used to be mounted on the rotating shaft 200 of the generator set 300, so that the inner shell portion 11 can communicate with the generator set through the rotating shaft 200. 300 operates synchronously (for example, the inner shell 11 rotates synchronously with the rotor assembly of the generator set 300).

[Example 2]

Please refer to FIG. 9, which is the second embodiment of the present invention. This embodiment is similar to the above-mentioned first embodiment, so the similarities between the two embodiments will not be repeated. However, this embodiment is different from the above-mentioned first embodiment. The difference is that the connection mode of the elastic element 4 of this embodiment is different from that of the first embodiment.

Specifically, in this embodiment, one end of each elastic element 4 is connected to the inner shell portion 11, and the other end of each elastic element 4 is connected to a position adjacent to the magnetic portion 212 in the swing structure 2 (such as: The second end 214).

[Example Three]

Please refer to FIG. 10 and FIG. 11, which are the third embodiment of the present invention. This embodiment is similar to the above-mentioned first embodiment, so the similarities between the two embodiments will not be repeated here. However, this embodiment is different from the above-mentioned embodiment. The difference of the first embodiment is that the speed limiting mechanism 100 of this embodiment includes a plurality of torsion springs 6 respectively installed on the N oscillating structures 2 to replace the plurality of elastic elements 4 of the first embodiment.

Specifically, each swing arm 21 of this embodiment is equipped with a torsion spring 6. Each torsion spring 6 includes an elastic portion 61 and a first positioning portion 62 and a second positioning portion 63 respectively extending from two ends of the elastic portion 61. In the swing arm 21 of each swing structure 2 and the corresponding torsion spring 6, the elastic portion 61 is disposed on the pivoting portion 211, the first positioning portion 62 is fixed to the swing arm 21, and the second The two fixing parts 63 are installed on the inner shell part 11.

[Example Four]

Please refer to FIG. 12, which is the fourth embodiment of the present invention. This embodiment is similar to the above-mentioned embodiment one, so the similarities between the two embodiments will not be repeated here. However, this embodiment is different from the above-mentioned embodiment one. The difference is that the speed limiting mechanism 100 of this embodiment uses a plurality of inner magnets 7 installed on the inner shell portion 11 to replace the plurality of outer magnets 5 of the first embodiment.

Specifically, each swing structure 2 in this embodiment corresponds to an inner The magnets 7, however, in other embodiments not shown in the present invention, each swing structure 2 may also correspond to at least one of the inner magnets 7 in position.

Furthermore, in each of the above-mentioned swing structures 2 and the corresponding one of the inner magnets 7, the corresponding inner magnet 7 is located between the magnetic parts 212 of the two swing arms 21 in the initial position , And can attract each other. Accordingly, each oscillating structure 2 can attract each other through its magnetic portion 212 and the corresponding inner magnet 7, so that the oscillating structure 2 can be controlled to swing outwards under a specific wind speed environment, and thus can be applied to different The wind speed demand.

The foregoing descriptions are only preferred and feasible embodiments of the present invention, and are not used to limit the scope of protection of the present invention. All equivalent changes and modifications made in accordance with the patent scope of the present invention shall fall within the protection scope of the claims of the present invention.

100‧‧‧Speed Limiting Mechanism

1‧‧‧Shell module

11‧‧‧Inner shell

111‧‧‧Retaining tank

12‧‧‧Shell

12a‧‧‧Sub-shell

2‧‧‧Swing structure

21‧‧‧Swing arm

211‧‧‧Pivot

212‧‧‧Magnetic Department

213‧‧‧First end

214‧‧‧Second end

22‧‧‧Connecting rod

3‧‧‧Metal ring

31‧‧‧Sub-ring body

4‧‧‧Elastic element

5‧‧‧Outer magnet

C‧‧‧Central axis

Claims (10)

A speed-limiting mechanism for wind power generation equipment includes: a housing module, including an inner housing part and an outer housing part, the inner housing part and the outer housing part jointly enclose an accommodating space, and the inner housing The part can be used to be detachably mounted on a rotating shaft; N swing structures are located in the accommodating space and each includes at least one swing arm, N is a positive integer greater than 1, and each swing structure At least one of the swing arms includes a pivotal portion and a magnetic portion; in at least one of the swing arms of each of the swing structures, the pivotal portion is pivotally connected to the inner shell portion, according to A centrifugal force generated by the rotating shaft during rotation causes the magnetic part to move from an initial position to a speed limit position relative to the inner shell part; and a metal ring located in the accommodating space Inside and fixed to the housing part; wherein, when the magnetic part of at least one of the swing arms of each of the swing structures moves to the speed limit position due to the centrifugal force, the magnetic part Along a direction parallel to the rotating shaft, at least partially covering the metal ring, so that its magnetic field rotates relative to the metal ring, so that the metal ring is formed with a rotating shaft that can limit the rotation speed of the rotating shaft. Eddy current; wherein, the eddy current is used to generate a tangential component force opposite to the direction of movement of the magnetic part, thereby slowing down the acceleration of the rotation speed of the rotating shaft. The speed limiting mechanism for wind power generation equipment according to claim 1, wherein the number of at least one of the swing arms of each of the swing structures is further limited to two, and each of the swing structures includes two A connecting rod of the two swing arms, so that the two swing arms can swing synchronously. The speed-limiting mechanism of wind power generation equipment according to claim 2, wherein the speed-limiting mechanism includes a plurality of inner magnets installed on the inner shell, and each of the swing structures corresponds to at least one position The inner magnet; in each of the swing structures and corresponding at least one of the inner magnets, the two swing arms are opposite to The connecting rods are arranged in mirror symmetry, and at least one corresponding inner magnet is located between the magnetic parts of the two swing arms in the initial position and can attract each other. The speed-limiting mechanism of wind power generation equipment according to claim 2, wherein the speed-limiting mechanism includes a plurality of outer magnets installed on the inner shell, and each of the swing structures corresponds to at least two positions in position. Each of the outer magnets; in each of the swing structures and the corresponding at least two outer magnets, the two swing arms are arranged in mirror symmetry with respect to the connecting rod, and the corresponding at least two The outer magnets are respectively located on two opposite outer sides of the magnetic parts of the two swing arms in the initial position, and can attract each other. The speed limiting mechanism for wind power generation equipment according to claim 1, wherein at least one of the swing arms of each of the swing structures includes two outer sides of the magnetic part and the pivot part opposite to each other. A first end and a second end, the speed limiting mechanism includes a plurality of elastic elements, and the first end and the second end are adjacent to each other but belong to different swing structures. Connected by one of the elastic elements. The speed-limiting mechanism of wind power generation equipment according to claim 1, wherein the speed-limiting mechanism includes a plurality of elastic elements, and one end of each elastic element is connected to the inner shell portion, and each of the elastic elements is connected to the inner shell. The other end of the elastic element is connected to a position adjacent to the magnetic part in the swing structure. The speed-limiting mechanism of wind power generation equipment according to claim 1, wherein the speed-limiting mechanism includes a plurality of torsion springs respectively mounted on the N oscillating structures, and each of the torsion springs includes an elastic portion And a first positioning portion and a second positioning portion respectively extending from both ends of the elastic portion; in each of the swing structures and the corresponding torsion spring, the elastic portion is disposed on the pivot Part, the first positioning part is fixed to at least one of the swing arms, and the second fixing part is installed in the inner shell part. The speed limiting mechanism for wind power generation equipment according to claim 1, wherein the inner shell The part defines a central axis, and the N swing structures are arranged rotationally symmetrically with respect to the central axis, and are respectively located in any two adjacent swing structures with respect to the central axis. An included angle is formed, and the included angle is 360/N degrees. The speed limiting mechanism for wind power generation equipment according to claim 1, wherein the outer shell part is detachably assembled to the inner shell part; the outer shell part includes two sub-shells assembled with each other, The metal ring includes two sub-rings respectively fixed to the two sub-shells, and two ends of any one of the sub-rings are respectively connected to two ends of the other sub-ring. . The speed-limiting mechanism of wind power generation equipment according to claim 1, wherein the speed-limiting mechanism is used to be installed on the outside of a generator set, and the inner shell portion of the speed-limiting mechanism is used to be installed in the On the rotating shaft of the generator set, so that the inner shell part can run synchronously with the generator set through the rotating shaft.

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