阅读说明：本技术 风力发电机限速装置 (Speed limiting device of wind driven generator ) 是由 曾凡春 麻红波 杨继明 张澈 王晓宁 于 2021-09-30 设计创作，主要内容包括：本发明提供一种风力发电机限速装置,属于风力发电技术领域。其中,该风力发电机限速装置包括：装置箱以及容纳于所述装置箱的磁性限速件、密封件和驱动组件；其中,所述密封件位于发电机与所述装置箱之间,以在所述发电机产生高温后受热向所述驱动组件的一侧膨胀；所述驱动组件一端与所述密封件连接,另一端与所述磁性限速件连接,以通过所述密封件膨胀而驱动所述磁性限速件向所述发电机的驱动轴靠近,通过磁力对所述驱动轴进行限速,增加驱动轴的转动阻力,起到限速作用,相对于传统的限速方式,本方面的限速调节无需人工接触。(The invention provides a speed limiting device of a wind driven generator, and belongs to the technical field of wind power generation. Wherein, this aerogenerator speed limiting device includes: the device comprises a device box, a magnetic speed limiting piece, a sealing piece and a driving assembly, wherein the magnetic speed limiting piece, the sealing piece and the driving assembly are accommodated in the device box; wherein the seal is located between the generator and the device case to expand to one side of the drive assembly by heat after the generator generates a high temperature; one end of the driving assembly is connected with the sealing element, the other end of the driving assembly is connected with the magnetic speed limiting piece, the magnetic speed limiting piece is driven to approach to a driving shaft of the generator through expansion of the sealing element, speed limitation is carried out on the driving shaft through magnetic force, rotation resistance of the driving shaft is increased, a speed limiting effect is achieved, and compared with a traditional speed limiting mode, the speed limiting adjustment in the aspect does not need manual contact.)

1. A wind driven generator speed limiting device is characterized by comprising: the device comprises a device box, a magnetic speed limiting piece, a sealing piece and a driving assembly, wherein the magnetic speed limiting piece, the sealing piece and the driving assembly are accommodated in the device box; wherein the content of the first and second substances,

the sealing member is positioned between the generator and the device box so as to be heated to expand towards one side of the driving component after the generator generates high temperature;

one end of the driving component is connected with the sealing element, the other end of the driving component is connected with the magnetic speed limiting piece, so that the magnetic speed limiting piece is driven to approach the driving shaft of the generator penetrating through the device box through expansion of the sealing element, and the driving shaft is limited by magnetic force.

2. The wind driven generator speed limiting device of claim 1, wherein a first end of the magnetic speed limiting member is movably fixed to an inner top wall of the device box, and a second end of the magnetic speed limiting member is switched between a first position and a second position; and the number of the first and second groups,

the second end of the magnetic speed limiting piece is abutted against the driving assembly when being positioned at the first position;

and when the second end of the magnetic speed limiting piece is positioned at the second position, the driving shaft is limited by magnetic force.

3. The wind turbine speed limiter of claim 2, wherein the second end of the magnetic speed limiter is provided with an anti-wear member.

4. The wind turbine speed limiter of any one of claims 1 to 3, wherein the drive assembly includes a first drive member and a second drive member; wherein the content of the first and second substances,

one side of the first driving piece is connected with the sealing piece, and the other side of the first driving piece is connected with the first side of the second driving piece;

the second side of the second driving piece is connected with the inner top wall of the device box in a sliding mode, and the third side of the second driving piece is abutted to the magnetic speed limiting piece.

5. The wind driven generator speed limiting device according to claim 4, wherein a first elastic member and a second elastic member are provided on an inner top wall of the device case, wherein,

the first elastic piece is connected with the middle area of the magnetic speed limiting piece,

the second elastic member is connected with a second side of the second driving member.

6. The wind driven generator speed limiting device according to claim 4, wherein the magnetic speed limiting member is arranged obliquely from an inner top wall of the device box to the direction of the driving shaft; and/or the presence of a gas in the gas,

the third side of the second driving piece is obliquely arranged from the inner top wall of the device box to the direction of the driving shaft.

7. The wind driven generator speed limiting device of claim 5, wherein the angle of inclination of the second driving member is greater than the angle of inclination of the magnetic speed limiting member.

8. The wind driven generator speed limiting device according to any one of claims 1 to 3, wherein the speed limiting device further comprises an air blowing piece connected with the driving assembly, and the air blowing piece is arranged in a protective box on the outer top wall of the device box; and the number of the first and second groups,

the protection box is communicated with a space where the generator is located, and the driving assembly drives the air blowing piece to blow air and cools the generator through the air conveying pipe.

9. The wind turbine speed limiter of claim 8, wherein the speed limiter further comprises a first bevel gear and a second bevel gear, wherein,

the fixed cover of first awl tooth is established in the drive shaft, second awl tooth movably sets up first awl tooth top, just the loose axle is worn to be equipped with in the inside of second awl tooth, the top of loose axle is provided with the air-blast piece, the top of air-blast piece with drive assembly swing joint, through the drive assembly drive first awl tooth with second awl tooth meshes mutually, so that the drive shaft rotates and drives air-blast piece synchronous rotation.

10. The wind driven generator speed limiting device according to claim 9, wherein the distance between the first bevel gear and the second bevel gear is the same as the lifting height of the blowing member.

Technical Field

The invention belongs to the technical field of wind power generation, and particularly relates to a speed limiting device of a wind driven generator.

Background

Wind power generation usually drives a fan blade to rotate through wind power, power generated by rotation of a fan blade driving shaft is converted into mechanical energy, and a power generation process is realized through a generator.

At present, traditional speed limiting device is mostly through addding the mode of rubber pad and drive shaft contact, and increase frictional force plays the speed limit effect, and the drive shaft rubs with the rubber pad for a long time, not only can cause the quick loss of rubber pad, influences the effect of speed limit, still can produce certain heat, causes the influence to the operation of generator. And the traditional speed limiting device is mainly used for manually controlling the speed limiting structure and limiting the rotating speed of the generator, and because the wind power generation equipment is positioned at a higher position, the running condition of the generator cannot be known when the speed limiting structure is adjusted, and when the generator is in an overload state, corresponding measures cannot be immediately known and taken.

Therefore, a new wind power generator speed limiting device needs to be developed.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art and provides a speed limiting device of a wind driven generator.

The invention provides a wind driven generator speed limiting device, which comprises: the device comprises a device box, a magnetic speed limiting piece, a sealing piece and a driving assembly, wherein the magnetic speed limiting piece, the sealing piece and the driving assembly are accommodated in the device box; wherein the content of the first and second substances,

the sealing member is positioned between the generator and the device box so as to be heated to expand towards one side of the driving component after the generator generates high temperature;

one end of the driving component is connected with the sealing element, the other end of the driving component is connected with the magnetic speed limiting piece, so that the magnetic speed limiting piece is driven to approach the driving shaft of the generator penetrating through the device box through expansion of the sealing element, and the driving shaft is limited by magnetic force.

Optionally, the first end of the magnetic speed-limiting member is movably fixed to the inner top wall of the device box, and the second end of the magnetic speed-limiting member is switched between a first position and a second position; and the number of the first and second groups,

the second end of the magnetic speed limiting piece is abutted against the driving assembly when being positioned at the first position;

and when the second end of the magnetic speed limiting piece is positioned at the second position, the driving shaft is limited by magnetic force.

Optionally, the second end of the magnetic speed limiting member is provided with an anti-wear member.

Optionally, the driving assembly includes a first driving member and a second driving member; wherein the content of the first and second substances,

one side of the first driving piece is connected with the sealing piece, and the other side of the first driving piece is connected with the first side of the second driving piece;

the second side of the second driving piece is connected with the inner top wall of the device box in a sliding mode, and the third side of the second driving piece is abutted to the magnetic speed limiting piece.

Optionally, a first elastic member and a second elastic member are disposed on the inner top wall of the device case, wherein,

the first elastic piece is connected with the middle area of the magnetic speed limiting piece,

the second elastic member is connected with a second side of the second driving member.

Optionally, the magnetic speed limiting member is arranged obliquely from the inner top wall of the device box to the direction of the driving shaft; and/or the presence of a gas in the gas,

the third side of the second driving piece is obliquely arranged from the inner top wall of the device box to the direction of the driving shaft.

Optionally, the inclination angle of the second driving member is larger than the inclination angle of the magnetic speed limiting member.

Optionally, the speed limiting device further comprises an air blowing piece connected with the driving assembly, and the air blowing piece is arranged in a protective box on the outer top wall of the device box; and the number of the first and second groups,

the protection box is communicated with a space where the generator is located, and the driving assembly drives the air blowing piece to blow air and cools the generator through the air conveying pipe.

Optionally, the speed limiting device further comprises a first bevel gear and a second bevel gear, wherein,

the fixed cover of first awl tooth is established in the drive shaft, second awl tooth movably sets up first awl tooth top, just the loose axle is worn to be equipped with in the inside of second awl tooth, the top of loose axle is provided with the air-blast piece, the top of air-blast piece with drive assembly swing joint, through the drive assembly drive first awl tooth with second awl tooth meshes mutually, so that the drive shaft rotates and drives air-blast piece synchronous rotation.

Optionally, the distance between the first conical tooth and the second conical tooth is the same as the lifting height of the blower.

The invention provides a wind driven generator speed limiting device, which comprises: the device comprises a device box, a magnetic speed limiting piece, a sealing piece and a driving assembly, wherein the magnetic speed limiting piece, the sealing piece and the driving assembly are accommodated in the device box; wherein the seal is located between the generator and the device case to expand to one side of the drive assembly by heat after the generator generates a high temperature; one end of the driving assembly is connected with the sealing element, the other end of the driving assembly is connected with the magnetic speed limiting piece, the magnetic speed limiting piece is driven to approach to a driving shaft of the generator through expansion of the sealing element, speed limitation is carried out on the driving shaft through magnetic force, rotation resistance of the driving shaft is increased, a speed limiting effect is achieved, and compared with a traditional speed limiting mode, the speed limiting adjustment in the aspect does not need manual contact.

Drawings

FIG. 1 is a schematic structural diagram of a wind turbine speed limiting device according to an embodiment of the invention;

FIG. 2 is a cross-sectional view of a wind turbine speed limiter according to another embodiment of the present invention;

FIG. 3 is a schematic view of a gasket according to another embodiment of the present invention after expansion under heat;

FIG. 4 is a schematic top view of a guide block according to another embodiment of the present invention;

FIG. 5 is a front cross-sectional view of a guide block of another embodiment of the present invention;

FIG. 6 is a front cross-sectional view of a protective case according to another embodiment of the present invention;

fig. 7 is a partial enlarged view of the invention at a in fig. 6.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Unless otherwise specifically stated, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this invention belongs. The use of "including" or "comprising" and the like in this disclosure does not limit the presence or addition of any number, step, action, operation, component, element, and/or group thereof or does not preclude the presence or addition of one or more other different numbers, steps, actions, operations, components, elements, and/or groups thereof. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number and order of the indicated features.

In some descriptions of the invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," or "fixed" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect through an intermediate medium, whether internal to two elements or an interactive relationship between two elements. Also, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate an orientation or positional relationship based on that shown in the drawings, and are used only to indicate a relative positional relationship, which may also be changed accordingly when the absolute position of the object being described is changed.

As shown in fig. 1 to 7, the present invention provides a speed limiting device of a wind turbine, including: an apparatus case 110, and a magnetic speed limiter 120, a sealing member 130 and a driving assembly accommodated in the apparatus case 110; wherein the sealing member 130 is located between the generator 210 and the device case 110 to expand toward one side of the driving assembly by heat after the generator 210 generates a high temperature; one end of the driving component is connected with the sealing element 130, and the other end is connected with the magnetic speed-limiting member 120, so that the magnetic speed-limiting member 120 is driven to approach the driving shaft 220 of the generator 210 penetrating through the device box 110 through expansion of the sealing element 130, and the rotation resistance of the driving shaft 220 is increased through magnetic force, so as to limit speed.

Specifically, as shown in fig. 1, a tower column 230 is further disposed at the bottom of the apparatus box of this example, the top of the tower column 230 is fixed to the apparatus box 110 through a bolt, a fixing cavity 111 is formed inside the apparatus box 110, a driving shaft 220 penetrates through the fixing cavity 111, one end of the driving shaft 220 is connected to a fan blade 240, and the other end of the driving shaft 220 is provided with a generator 210. That is, the speed limit of the driving shaft of the generator is achieved by arranging a magnetic speed limiting member in the device box.

It should be noted that the present example is not limited to the type of the sealing member, for example, a rubber gasket, etc., as long as it functions to isolate the device case from the space where the generator is located and can be thermally expanded.

Specifically, as shown in fig. 1 to 5, a first end of the magnetic speed limiting member 120 is movably fixed on an inner top wall of the device box 110, which is equivalent to the inner top wall of the fixing cavity 111, and the magnetic speed limiting member is movably installed to form a rotating structure, and a second end of the magnetic speed limiting member 120 is switched between a first position and a second position; and the second end of the magnetic speed-limiting member 120 abuts against the driving assembly when in the first position; when the second end of the magnetic speed limiting member 120 is at the second position, the speed of the driving shaft 220 is limited by magnetic force. That is to say, when the generator is overloaded and generates heat, the sealing element is heated to expand, and the driving assembly drives the magnetic speed limiting member to be switched from the first position to the second position based on the expansion of the sealing element, so that the rotating speed of the driving shaft is increased through magnetic force, and the speed limiting effect is achieved.

It should be understood that the first position of the present example refers to a position abutting the drive assembly and the second position refers to a position proximate the drive shaft.

As shown in fig. 1 to 5, the magnetic speed limiter 120 of the present example is disposed obliquely from the inner top wall of the apparatus case 110 toward the driving shaft 220 so as to be close to and add resistance to the driving shaft. In addition, the middle region of the magnetic speed-limiting member 120 of this example is also fixedly connected to the inner top wall of the device case 110 through a first elastic member 112 (e.g., a spring), that is, the first elastic member 112 is fixed to the inner top wall of the fixing cavity 111, when the magnetic speed-limiting member 120 is close to the driving shaft 220, the first elastic member 112 is in a stretching state, and when the magnetic speed-limiting member 120 abuts against the driving assembly, the first elastic member 112 is in a compressing state.

It should be further noted that, the magnetic speed-limiting member in this example may be a magnetic plate, and the second end of the magnetic plate close to the driving shaft is provided with magnetism, that is, the magnetic speed-limiting member may be made of a magnetic material as a whole, or may be made of a magnetic material as a part, which is not limited specifically.

Further, as shown in fig. 2 and 4, the second end of the magnetic speed limiting member 120 is provided with an anti-abrasion member 121 to prevent the magnetic speed limiting member from contacting the driving shaft to cause abrasion to the driving shaft, thereby performing a protective function.

In this example, the shape and material of the wear prevention member are not particularly limited, and may be set according to the actual situation. For example, it is provided in a spherical shape and made of rubber.

Furthermore, the driving assembly comprises a first driving member and a second driving member; one side of the first driving piece is connected with the sealing piece, and the other side of the first driving piece is connected with the first side of the second driving piece; the second side of the second driving piece is connected with the inner top wall of the device box in a sliding mode, and the third side of the second driving piece is connected with the magnetic speed limiting piece in an abutting mode.

It should be noted that, in this example, the first driving element and the second driving element are not particularly limited, and may be a single structure or a combined driving structure, and this is not particularly limited.

Exemplarily, as shown in fig. 1 to 5, the driving assembly includes a fixed block 141, a movable plate 142, a first pressing rod 143, and a guide block 144. The fixed block 141, the movable plate 142 and the first pressing rod 143 correspond to a first driving member, and the guide block 144 corresponds to a second driving member. The fixed block 141 is fixed to the sealing member 130, the side of the movable plate 142 is attached to the fixed block 141, one end of the first pressing rod 143 is fixed to the movable plate 142, and the other end is fixed to the guide block 144.

Further, with continued reference to fig. 1 to 5, a second elastic member 113 (e.g., a spring) is fixed above the guide block 144, that is, the second elastic member 113 is fixed on the inner top wall of the fixing cavity 111, which is equivalent to that the second elastic member 113 is connected to the second side of the second driving member, so that the second side (upper surface) of the guide block 144 and the inner top wall of the device case 110 are in close sliding connection through the second elastic member 113. In addition, the third side (lower surface) of the guide block of the present example is provided obliquely from the inner ceiling wall of the apparatus case 110 toward the drive shaft 220.

Further, as shown in fig. 2, 3 and 5, the inclination angle of the second driving member (the guide block 144) of the present example is larger than the inclination angle of the magnetic speed-limiting member 120, so that the magnetic speed-limiting member 120 is driven to rotate and approach the driving shaft 220 by the inclined surface of the guide block 144.

It is to be noted that, based on the above-described structure of the present example, the main speed-limiting process of the drive shaft by the magnetic speed-limiting member is as follows: as shown in fig. 1 to 5, the sealing member 130 is expanded by heat, the fixed block 141 and the movable plate 142 move inward due to the expansion of the sealing member 130, and further the first pressing rod 143 drives the guide block 144 to approach the magnetic speed-limiting member 120, because the lower surface of the guide block 144 is an inclined surface, the magnetic speed-limiting member 120 can be pushed to rotate and approach the driving shaft 220, the resistance to the rotation of the driving shaft 220 is increased by magnetic force, and the speed-limiting function is achieved.

In addition, as shown in fig. 1 to 6, the governor of the present example further includes a blowing member 150 connected to the driving assembly, the blowing member 150 being disposed in a protective box 160 on an outer top wall of the apparatus case 110; and the wind conveying pipe 170 is used for communicating the protection box 160 with the space where the generator is located, and the driving assembly drives the blowing piece 150 to blow air and carries out cooling treatment on the generator 210 through the wind conveying pipe 170.

Further, as shown in fig. 1 to 6, in some embodiments, a first wind cover 171 is disposed on the top of the protective box 160, a second wind cover 172 is disposed on the top of the space where the generator 210 is located, the two wind covers are connected to each other through a wind pipe 170, and a one-way valve is disposed at an end of the wind pipe 170 connected to the device box 110, so that wind is delivered from the protective box 160 to the accommodating space of the generator 210 through the first wind cover 171 and the second wind cover 172, so as to cool the generator.

Furthermore, as shown in fig. 3 and 6, the speed limiting device further includes a first bevel gear 181 and a second bevel gear 182, wherein the first bevel gear 181 is fixedly sleeved on the driving shaft 220, the second bevel gear 182 is movably disposed above the first bevel gear 181, a movable shaft 183 is disposed inside the second bevel gear 182, a blowing member 150 is disposed on the top of the movable shaft 183, the top of the blowing member 150 is movably connected to the driving assembly, and the driving assembly drives the first bevel gear 181 and the second bevel gear 182 to engage with each other, so that the driving shaft 220 rotates and drives the blowing member 150 to synchronously rotate.

Further, as shown in fig. 1 to 6, the driving assembly further includes a second pressing rod 145, a pressing switch 146, a controller 147 and an electric push rod 148, wherein the second pressing rod 145 is connected to the movable plate 142, the inner wall of the fixed cavity 111 is further provided with a fixed plate 114, the surface of the fixed plate 114 is provided with the pressing switch 146, the side surface of the pressing switch 146 is attached to the second pressing rod 145, the other side surface of the pressing switch 146 is connected to the electric push rod 148 through the controller 147, and the bottom of the electric push rod 148 is movably connected to the top of the blowing member 150.

It should be noted that, in this example, the movable connection manner of the electric push rod and the blower is not specifically limited, for example, as shown in fig. 7, a connection block 149 is disposed between the blower 150 and the electric push rod 148, wherein a side of the blower 150 facing the electric push rod 148 is provided with a first connection groove, a side of the electric push rod 148 facing the blower 150 is provided with a second connection groove, two ends of the connection block 149 are provided with a first connection portion and a second connection portion, the two connection portions are respectively embedded into the first connection groove and the second connection groove, and central axes of the three portions are located on a same vertical line, and the blower, the connection block and the electric push rod constitute a relative rotation structure to movably connect a top portion of the electric push rod and a top portion of the blower.

The shapes of the first connecting groove, the second connecting groove, and the first connecting portion and the second connecting portion are not particularly limited, and may be, for example, circular.

It should be understood that, since the second bevel gear is located above the first bevel gear, the moved second bevel gear is engaged with the first bevel gear, and therefore, the distance between the first bevel gear and the second bevel gear is equal to the lifting height of the air blowing member.

It should be further noted that the type of the air blowing member is not specifically limited in this example, for example, a fan blade, and other types of air blowing members may be selected.

It should be noted that the first pressing rod and the second pressing rod of the present example are disposed on the same side of the movable plate, specifically, as shown in fig. 1 to 6, an edge of the movable plate 142 is attached to an inner wall of the fixed cavity 111 and a surface of the fixed plate 114, the movable plate 142 and the fixed plate 114 are in horizontal sliding connection, two pressing rods, i.e., a first pressing rod 143 and a second pressing rod 145, are symmetrically disposed on a side of the movable plate 142 away from the fixed block 141, and a length of the second pressing rod 145 attached to the pressing switch 146 is smaller than a length of the first pressing rod 143 connected to the guide block 144.

Based on the above structure of the present example, and as shown in fig. 1 to 7, the usage method of the wind turbine speed limiter is as follows:

s1: firstly, when the space where the generator 210 is located is overloaded and generates high temperature, the sealing element 130 can be driven to expand by heating, and the fixed block 141 is driven to push the movable plate 142 to move, so that the second pressing rod 145 presses the pressing switch 146, and thus the electric push rod 148 can be driven to operate through the transmission of the controller 147, and the air blowing element 150 and the movable shaft 183 are pushed downwards, so that the engagement between the second conical tooth 182 and the first conical tooth 181 is realized.

S2: secondly, after the 2 conical teeth are engaged, the rotation of the driving shaft 220 can drive the movable shaft 183 and the blowing member 150 to synchronously rotate, so that the generated wind power can enter the space where the generator 210 is located through the wind delivery pipe 170, and the cooling treatment of the generator 210 is realized.

S3: in a synchronous manner, the first pressing rod 143 can push the guiding block 144 to approach the magnetic speed-limiting member 120, and the lower surface of the guiding block 144 is inclined, so that the magnetic speed-limiting member 120 can be pushed to rotate and approach the driving shaft 220, the resistance of the driving shaft 220 to rotate is increased by magnetic force, and a speed-limiting effect is achieved, and the magnetic speed-limiting member 120 is provided with the wear-resistant member 121 made of rubber, so that the magnetic speed-limiting member 120 can be prevented from being directly contacted with the driving shaft 220 to cause wear.

S4: finally, when the generator 210 is in normal operation, the engagement between the first bevel gear 181 and the second bevel gear 182 can be released, the supply of wind power is stopped, the sealing member 130 is driven to be in a flush state, the pressing of the push switch 146 is stopped, the guide block 144 is driven to return to the original position, the pushing of the magnetic speed limiting member 120 is released, and the magnetic speed limiting member is rotated to the initial inclined state.

The invention provides a speed limiting device of a wind driven generator, which has the following technical effects compared with the prior art: compared with the traditional speed limiting mode, the speed limiting adjusting mode of the invention does not need to be contacted, thereby avoiding the phenomenon of part abrasion, and can cool down the high-temperature space while limiting the speed, thereby ensuring that the generator can be quickly recovered to work.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these changes and modifications are also considered to be within the scope of the invention.