A wind turbine nacelle transformer

Abstract

The application discloses a wind turbine nacelle transformer, bolt structure is adopted to connect between supports of the wind turbine nacelle transformer, bolt structure is adopted to connect between busbars of the wind turbine nacelle transformer, an anti-loosening device is arranged outside the bolt structure, the anti-loosening device comprises upper and lower layers, the upper and lower layers are respectively provided with width adjusting mechanisms, and the upper and lower layers are connected through a spacing self-adapting connecting mechanism. The application completely limits and fixes the nut of the bolt structure through the upper and lower layers, so that the bolt cannot rotate, and the problem that the bolt is shaken off is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a transformer, in particular to a wind turbine nacelle transformer, and belongs to the technical field of transformers. BACKGROUND

[0002] The wind turbine nacelle transformer is one of the core components of the offshore wind power device. Since offshore wind power mainly relies on the rotation of the fan blade to drive the generator to generate electricity, the wind turbine nacelle transformer is arranged in the wind turbine nacelle at the rear end of the fan blade. Since it is very close to the fan blade and is located at the uppermost end of the wind turbine pile, the wind turbine nacelle will inevitably produce relatively serious vibration when the fan blade rotates to generate electricity. The wind turbine nacelle transformer many racks and backflow rows and other structures need to be connected and fixed by bolts, and the vibration of the wind turbine nacelle will cause the bolts of these linked parts to loosen. Once the structure loosens to the extent that the transformer connection structure cannot be kept stable, it is easy to cause damage to the transformer and the entire wind power device system. At present, in order to alleviate the loosening of the bolts caused by vibration, double self-locking washers and double self-locking nuts and other structures are usually used. Although this to some extent alleviates the problem of bolt loosening caused by vibration, these measures still cannot completely solve the problem of bolt loosening caused by relatively serious vibration. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a wind turbine nacelle transformer to solve the problem of bolt loosening of the wind turbine nacelle transformer.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is:

[0005] A wind turbine nacelle transformer, the supports of the wind turbine nacelle transformer are connected by a bolt structure, the bus bars of the wind turbine nacelle transformer are connected by a bolt structure, the outer side of the bolt structure is provided with an anti-loosening device, the anti-loosening device comprises an upper layer plate and a lower layer plate, the upper layer plate and the lower layer plate are respectively provided with a width adjusting mechanism, and the upper layer plate and the lower layer plate are connected by a spacing self-adaptive connecting mechanism.

[0006] Further, the lower side of the upper layer plate is provided with six nut locking mechanisms, which are symmetrically arranged in two groups on the upper and lower sides of the lower side of the upper layer plate. Each nut locking mechanism comprises a locking block, an elastic cone ring, an outer gear ring and a gear rack. The locking block is in the shape of a cylinder. A blind hole matching the locking block is formed on the lower side of the upper layer plate corresponding to each locking block. The locking block is rotatably arranged in the blind hole and can rotate along the circumferential direction of the blind hole. An inner hexagonal hole matching a nut is formed on the lower end surface of the locking block. The lower end of the inner hexagonal hole is provided with a trumpet-shaped flared opening. A through hole matching a bolt is formed on the upper end of the inner hexagonal hole. The upper end of the locking block is in the shape of a circular truncated cone. The elastic cone ring is fixed to the inner wall of the blind hole on the upper end of the locking block. The outer gear ring is sleeved on the outer side of the locking block and is fixedly connected with the locking block. The outer gear ring is engaged with the gear rack.

[0007] Further, the lower end of the locking block is provided with a stepped structure, and the lower end of the blind hole is also provided with a stepped structure matching the lower end of the locking block. The stepped structure of the lower end of the locking block is engaged with the stepped structure of the lower end of the blind hole.

[0008] Further, the elastic cone ring is in the shape of a ring. The inner side of the elastic cone ring is in the shape of a cone and arches upward. The taper of the elastic cone ring matches the taper of the upper end of the locking block. A plurality of grooves are formed on the inner ring of the elastic cone ring. The grooves are arranged along the radial direction of the elastic cone ring and are equally spaced along the circumferential direction of the elastic cone ring.

[0009] Further, the gear rack is provided with two gear racks, each of which is engaged with the outer gear ring of one group of nut locking mechanisms. The gear racks are slidably arranged in the upper layer plate along the upper and lower directions of the upper layer plate. The two ends of the gear racks are provided with sliding plates. The two sides of the upper layer plate are provided with gear rack sliding grooves matching the gear racks. The side of the gear rack sliding groove away from the center of the upper layer plate is provided with a gear rack cavity, and the thickness of the gear rack cavity is greater than that of the gear rack sliding groove.

[0010] Further, the inner side of the upper layer plate is provided with a gear rack locking mechanism corresponding to each end of the gear rack. The gear rack locking mechanism comprises a locking elastic plate and a wedge-shaped buckle. A rectangular hole is formed in the upper layer plate. The locking elastic plate is arranged in the rectangular hole, and one end of the locking elastic plate is fixed to one end of the rectangular hole. The wedge-shaped buckle is fixed to the other end of the locking elastic plate. When the gear rack slides along the gear rack sliding groove to engage with the outer gear ring, the wedge-shaped buckle locks and limits the gear rack.

[0011] Further, four nut locking mechanisms located on the left and right sides of the upper layer plate among the six nut locking mechanisms are provided with a spacing adjustment mechanism. The spacing adjustment mechanism comprises an adjustment sliding plate and an adjustment sliding groove. The adjustment sliding groove is formed on the lower side of the upper layer plate along the left and right directions. The adjustment sliding plate is slidably arranged in the adjustment sliding groove and can slide left and right in the adjustment sliding groove.

[0012] Further, the upper side of the lower layer plate is provided with six circular recesses, and four circular recesses located at the left and right sides of the lower layer plate are provided with a spacing adjusting mechanism.

[0013] Further, the width adjusting mechanism comprises a plurality of width adjusting rods and a plurality of adjusting rod sliding grooves, the upper layer plate and the lower layer plate are respectively composed of a first layer plate and a second layer plate, the first layer plate and the second layer plate are located in the same plane, the first layer plate is provided with a plurality of adjusting rod sliding grooves on the side facing the second side plate, and the adjusting rod sliding grooves are arranged along the up-down direction of the upper layer plate or the lower layer plate, a plurality of width adjusting rods are arranged along the up-down direction of the upper layer plate or the lower layer plate, and one end of the plurality of width adjusting rods is fixed to the side of the second layer plate facing the first layer plate, and the other end of the plurality of width adjusting rods is slidingly arranged in the plurality of adjusting rod sliding grooves in a one-to-one correspondence.

[0014] Further, the spacing self-adaptive connecting mechanism is provided with four groups, and the four groups of spacing self-adaptive connecting mechanisms are respectively located at the four corner positions of the upper layer plate and the lower layer plate, each group of spacing self-adaptive connecting mechanisms comprises a connecting pin and a connecting pin hole, four connecting pin holes are arranged at the four corner positions of the upper layer plate, the connecting pin comprises a cylindrical body and a plurality of groups of conical barbs, the upper end of the cylindrical body is downwardly provided with a through groove equally dividing the cylindrical body into two parts, and the plurality of groups of conical barbs are uniformly distributed on the outer side of the cylindrical body from top to bottom, each group of conical barbs comprises two conical barbs, the two conical barbs are symmetrically distributed on the side surface of the cylindrical body on both sides of the through groove, the connecting pin hole is a through hole with an inner diameter matching the maximum outer diameter of the connecting pin, a snap ring structure is arranged in the connecting pin hole, the inner diameter of the snap ring structure matches the outer diameter of the cylindrical body, and the lower end of the snap ring structure is provided with a conical guide hole structure.

[0015] Compared with the prior art, the present application has the following advantages and effects:

[0016] 1. The wind turbine nacelle transformer provided by the present application completely limits and fixes the nut of the bolt structure through the upper layer plate and the lower layer plate, so that the bolt cannot rotate, thereby eliminating the problem that the bolt will be shaken off.

[0017] 2. The nut locking mechanism of the present application adopts a locking block designed by a rotating structure to lock the nut, which can be adjusted according to the actual angle position of the nut, and after adjustment, the nut locking mechanism is completely locked and limited by the sliding rack, which is easy to operate and has good adaptability.

[0018] 3. The up-down width of the upper layer plate and the lower layer plate of the present application can be adjusted, and the spacing between the nut locking mechanism and the circular recess can also be adjusted, so that the bolt fixing structure at different positions can be adjusted, and a set of device can be used for nut limiting in different parts of the transformer, which has good applicability and solves the cost of mold opening.

[0019] 4. The spacing adaptive connection mechanism of the present invention can adaptively adjust to the connection parts of the bracket or busbar of different thicknesses, which is highly adaptable. Moreover, it can be fixed by simply plugging it in, which is convenient and does not require tools. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a wind turbine nacelle transformer according to the present invention.

[0021] Figure 2 This is a schematic diagram of the anti-loosening device of the present invention.

[0022] Figure 3 This is a schematic diagram of the upper plate of the present invention.

[0023] Figure 4 This is a schematic diagram of the nut locking mechanism of the present invention.

[0024] Figure 5 This is a partial schematic diagram of the upper plate of the present invention.

[0025] Figure 6 This is a partial side view of the upper plate of the present invention.

[0026] Figure 7 This is a schematic diagram of the lower layer plate of the present invention.

[0027] Figure 8 This is a schematic diagram of the spacing adaptive connection mechanism of the present invention. Detailed Implementation

[0028] To illustrate in detail the technical solutions adopted by the present invention to achieve the intended technical objectives, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Furthermore, the technical means or technical features in the embodiments of the present invention can be replaced without creative effort. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figure 1 As shown, this invention relates to a wind turbine nacelle transformer. The supports of the wind turbine nacelle transformer are connected by a bolt structure 1, and the busbars of the wind turbine nacelle transformer are connected by a bolt structure 1. An anti-loosening device is provided on the outer side of the bolt structure 1. For example... Figure 2 As shown, the anti-loosening device includes an upper plate 2 and a lower plate 3. The upper plate 2 and the lower plate 3 are respectively provided with a width adjustment mechanism. The upper plate 2 and the lower plate 3 are connected by a spacing adaptive connection mechanism 4.

[0030] like Figure 3As shown, since the support and bolt structure of the wind turbine nacelle transformer usually adopts 6 bolts for fixed connection, in the present application, 6 nut locking mechanisms 5 are arranged on the lower side of the upper plate 2, and the 6 nut locking mechanisms 5 are symmetrically arranged on the upper and lower sides of the lower side of the upper plate 2 in two groups. As shown Figure 4 As shown, each nut locking mechanism 5 comprises a locking block 6, an elastic taper ring 7, an outer gear ring 8 and a gear rack 9. The locking block 6 is in the form of a cylinder as a whole, and a blind hole 10 matched with the locking block 6 is formed on the lower side of the upper plate 2 corresponding to each locking block 6. The locking block 6 is rotatably arranged in the blind hole 10 and can rotate along the circumferential direction of the blind hole 10. An inner hexagonal hole 11 matched with a nut is formed on the lower end face of the locking block 6, and a trumpet-shaped flared portion 12 is arranged at the lower end of the inner hexagonal hole 11. A through hole matched with a bolt is formed at the upper end of the inner hexagonal hole 11. The upper end of the locking block 6 is in the form of a circular truncated cone. The elastic taper ring 7 is fixed to the inner wall of the blind hole 10 at the upper end of the locking block 6. The outer gear ring 8 is sleeved on the outer side of the locking block 6 and is fixedly connected with the locking block 6. The outer gear ring 8 is engaged with the gear rack 9. At the beginning, the gear rack 9 is in a separated state from the outer gear ring 8. At this time, according to the actual installation angle of each bolt in the bolt structure 1, the locking block 6 can be rotated to an appropriate angle, so that the inner hexagonal hole 11 at the lower end of the locking block 6 is approximately matched with the angle of each nut. Then, the upper plate 2 is covered on the bolt structure 1. During the covering process, even if there is a deviation in the actual angle of the inner hexagonal hole 11 and the nut, due to the existence of the trumpet-shaped flared portion 12, the angle of the inner hexagonal hole 11 can be automatically adjusted during the covering process. When the upper plate 2 is completely adjusted in place, the gear rack 9 is pushed to engage with the outer gear ring 8, thereby limiting the locking block 6 from continuing to rotate, and the locking and fixing of the nut are completed.

[0031] The lower end of the locking block 6 is provided with a stepped structure, and the lower end of the blind hole 10 is also provided with a stepped structure matched with the lower end of the locking block 6. The stepped structure at the lower end of the locking block 6 is engaged with the stepped structure at the lower end of the blind hole 10. The locking block 6 is limited in the blind hole 10 by the stepped structure.

[0032] The elastic taper ring 7 is in the form of a ring. The inner side of the elastic taper ring 7 is in the form of a taper upwardly arched, and the taper of the elastic taper ring 7 is matched with the taper of the upper end of the circular truncated cone of the locking block 6. A plurality of grooves 13 are formed in the inner ring of the elastic taper ring 7. The grooves 13 are arranged along the radial direction of the elastic taper ring 7 and are distributed at equal intervals along the circumferential direction of the elastic taper ring 7. The elastic taper ring 7 is divided into a plurality of pieces along the circumferential direction by the grooves 13. When the locking block 6 slides upwardly to press the elastic taper ring 7, the elastic taper ring 7 is deformed upwardly and at the same time provides a downward rebound force to the locking block 6.

[0033] As shown Figure 5As shown, the rack 9 is provided with two, each rack 9 is respectively engaged with a group of nut locking mechanism 5 outer ring 8, the rack 9 is slidingly arranged in the upper layer plate 2 along the up and down direction of the upper layer plate 2, the two ends of the rack 9 are provided with the slide 14, the size of the slide 14 is greater than the vertical section size of the rack 9, so that the two slides 14 are arranged in the form of a pair of clamps on both sides of the upper layer plate 2. As Figure 6 As shown, the upper layer plate 2 is provided with a rack slot 15 on both sides, which matches the rack 9, and the rack slot 15 is provided with a rack cavity 16 away from the center of the upper layer plate 2, and the thickness of the rack cavity 16 is greater than that of the rack slot 15. When not in use, the rack 9 is located in the rack cavity 16, and due to the thickness of the rack cavity 16 being greater than that of the rack slot 15, the rack 9 is generally difficult to slide into the rack slot 15 by itself. When the rack 9 needs to be engaged with the outer ring 8, the rack 9 is lifted from the rack cavity 16 and the front side of the rack 9 is aligned with the rack slot 15, and then the rack 9 is pushed along the rack slot 15 towards the center of the upper layer plate 2, until the rack 9 is engaged with the outer ring 8.

[0034] As shown in the figure, Figure 5 As shown, the inner side of the upper layer plate 2 is provided with a rack locking mechanism corresponding to the two ends of the rack 9, the rack locking mechanism comprises a locking elastic plate 17 and a wedge-shaped buckle 18, a rectangular hole 19 is opened in the upper layer plate 2, the locking elastic plate 17 is arranged in the rectangular hole 19 and one end of the locking elastic plate 17 is fixed to one end of the rectangular hole 19, and the wedge-shaped buckle 18 is fixed to the other end of the locking elastic plate 17. When the rack 9 slides along the rack slot 15 to engage with the outer ring 8, the wedge-shaped buckle 18 locks and limits the rack 9. When the rack 9 is located in the rack cavity 16, the wedge-shaped slope of the wedge-shaped buckle 18 faces the rack 9. When the rack 9 slides inwards along the rack slot 15, the rack 9 presses down the wedge-shaped buckle 18 when it slides to the wedge-shaped buckle 18, and the wedge-shaped buckle 9 drives the elastic plate 17 to bend downwards. When the rack 9 is engaged with the outer ring 8, the rear side of the rack 9 just leaves the wedge-shaped buckle 18 at this time, the wedge-shaped buckle 18 rebounds under the action of the elastic plate 17 to limit and fix the rack 9, so that the rack 9 always engages with the outer ring 8. Since the rack 9 cannot slide left and right, the outer ring 8 cannot rotate either, and the locking and positioning of the nut locking mechanism 5 is completed.

[0035] The four nut locking mechanisms 5 located on the left and right sides of the upper plate 2 are provided with spacing adjustment mechanisms, which include an adjusting sliding plate 20 and an adjusting sliding groove 21. The adjusting sliding groove 21 is formed on the lower side of the upper plate 2 along the left-right direction, and the adjusting sliding plate 20 is slidingly arranged in the adjusting sliding groove 21 and can slide left and right in the adjusting sliding groove 21. The four nut locking mechanisms 5 are respectively arranged in the adjusting sliding plates 20 of the four spacing adjustment mechanisms. When it is necessary to adjust the spacing of a group of nut locking mechanisms 5, the adjusting sliding plate 20 is slid along the adjusting sliding groove 21 to complete the spacing adjustment of the nut locking mechanism 5.

[0036] As shown in Figure 7 The upper side of the lower plate 3 is provided with six circular recesses 22, and the four circular recesses 22 located on the left and right sides of the lower plate 3 are provided with spacing adjustment mechanisms. Here, the spacing adjustment mechanisms are the same as those of the upper plate 2, and thus will not be described again.

[0037] The width adjustment mechanism includes a plurality of width adjustment rods 23 and a plurality of adjusting rod sliding grooves. The upper plate 2 and the lower plate 3 are respectively composed of a first plate and a second plate. The first plate and the second plate are located in the same plane. The first plate is provided with a plurality of adjusting rod sliding grooves on the side facing the second plate, and the adjusting rod sliding grooves are formed along the up-down direction of the upper plate 2 or the lower plate 3. A plurality of width adjustment rods 23 are arranged along the up-down direction of the upper plate 2 or the lower plate 3, and one end of each width adjustment rod 23 is fixed to the side of the second plate facing the first plate. The other end of each width adjustment rod 23 is slidingly arranged in one of the plurality of adjusting rod sliding grooves. When it is necessary to adjust the up-down width of the upper plate 2 or the lower plate 3, the first plate and the second plate can be pulled apart or retracted along the length direction of the width adjustment rod 23 to complete the adjustment. The self-damping effect is achieved through the gap between the width adjustment rod 23 and the adjusting rod sliding groove.

[0038] The spacing self-adaptive connecting mechanism 4 is provided with four groups, and the four groups of spacing self-adaptive connecting mechanisms 4 are respectively located at the four corner positions of the upper plate 2 and the lower plate 3, as Figure 8As shown, the spacing self-adapting connecting mechanism 4 comprises a connecting pin 24 and a connecting pin hole 25, four connecting pin holes 25 are arranged at the four corners of the upper plate 2, the connecting pin 24 comprises a cylindrical body and a plurality of groups of tapered barbs 26, a through slot 27 is arranged at the upper end of the cylindrical body to divide the cylindrical body into two parts, the plurality of groups of tapered barbs 26 are uniformly distributed on the outer side of the cylindrical body from top to bottom, each group of tapered barbs 26 comprises two tapered barbs which are symmetrically arranged on the side surface of the cylindrical body on both sides of the through slot, the connecting pin hole 25 is a through hole with an inner diameter matched with the maximum outer diameter of the connecting pin 24, a snap ring structure 28 is arranged in the connecting pin hole 25, the inner diameter of the snap ring structure 28 is matched with the outer diameter of the cylindrical body, and a tapered guide hole structure is arranged at the lower end of the snap ring structure 28. In use, the upper plate 2 and the lower plate 3 are respectively arranged on the upper and lower sides of the bolt structure 1, and then the top end of the connecting pin 24 is inserted into the connecting pin hole 25, when the top end of the connecting pin 24 is inserted into the connecting pin hole 25 and is compressed inward by the tapered guide hole structure, after passing through the snap ring structure 28, the two tapered barbs at the upper end of the connecting pin 24 are not extruded outside and are opened to both sides, and the process is repeated until the upper plate 2 and the lower plate 3 are completely installed in place, at this time, the lower end of one group of tapered barbs in the plurality of groups of tapered barbs 26 is just clamped on the upper end surface of the snap ring structure 28, and the installation and fixation of the upper plate 2 and the lower plate 3 are completed.

[0039] The wind turbine nacelle transformer provided by the application can completely limit and fix the nut of the bolt structure, so that the bolt cannot rotate, and the problem that the bolt is shaken off is solved; the nut locking mechanism of the application adopts a locking block designed in a rotating structure to lock the nut, so that the nut can be adjusted according to the actual angle position of the nut, and after adjustment, the nut locking mechanism is completely locked and limited by the sliding rack, which is convenient to operate and has good adaptability; the upper and lower widths of the upper plate and the lower plate can be adjusted, and the spacing between the nut locking mechanism and the circular recess can also be adjusted, so that the bolt fixing structure at different positions can be adjusted, a set of device can be used for nut limiting of different parts of the transformer, has good applicability and solves the cost of mold opening; the spacing self-adapting connecting mechanism can be self-adaptively adjusted according to the connecting parts of the support or busbar with different thicknesses, has strong adaptability, and only needs to be directly inserted during fixation, which is convenient to operate without relying on tools.

[0040] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical contents without departing from the technical solution of the present application, and can make equivalent embodiments with equivalent changes, as long as they do not depart from the technical solution of the present application and are within the spirit and principle of the present application. Any simple modification, equivalent replacement and improvement of the above embodiments, as long as they are within the protection scope of the present application, are still within the protection scope of the present application.

Claims

1. A wind turbine nacelle transformer, the wind turbine nacelle transformer is connected by bolt structure between the support, the wind turbine nacelle transformer is connected by bolt structure between the busbar, it is characterized in that: The outer side of the bolt structure is provided with an anti-loosening device, the anti-loosening device comprises an upper layer plate and a lower layer plate, the upper layer plate and the lower layer plate are respectively provided with a width adjusting mechanism, and the upper layer plate and the lower layer plate are connected through a distance self-adaptive connecting mechanism; six nut locking mechanisms are arranged on the lower side of the upper layer plate, the six nut locking mechanisms are symmetrically arranged on the upper and lower sides of the lower side of the upper layer plate in two groups, each nut locking mechanism comprises a locking block, an elastic taper ring, an outer gear ring and a gear rack, the locking block is in the form of a cylinder as a whole, a blind hole matched with the locking block is formed on the lower side of the upper layer plate corresponding to each locking block, the locking block is rotationally arranged in the blind hole and can rotate along the circumferential direction of the blind hole, an internal hexagonal hole matched with a nut is formed on the lower end face of the locking block, the lower end of the internal hexagonal hole is provided with a trumpet-shaped flared opening, the upper end of the internal hexagonal hole is provided with a through hole matched with a bolt, the upper end of the locking block is in the form of a circular truncated cone, the elastic taper ring is fixed to the inner wall of the blind hole at the upper end of the locking block, the outer gear ring is sleeved on the outer side of the locking block and is fixedly connected with the locking block, and the outer gear ring is engaged with the gear rack; the gear rack is provided with two, each gear rack is engaged with the outer gear ring of one group of nut locking mechanisms, the gear rack is slidingly arranged in the upper layer plate in the up-down direction of the upper layer plate, the two ends of the gear rack are provided with sliding sheets, the two sides of the upper layer plate are provided with gear rack sliding grooves matched with the gear rack, and the gear rack sliding grooves are provided with gear rack cavities away from the center of the upper layer plate and the thickness of the gear rack cavities is greater than that of the gear rack sliding grooves. ​ 2. A wind turbine nacelle transformer according to claim 1, characterised in that: The lower end of the locking block is provided with a step structure, the lower end of the blind hole is also provided with a step structure matched with the lower end of the locking block, and the step structure of the lower end of the locking block is engaged with the step structure of the lower end of the blind hole.

3. A wind turbine nacelle transformer according to claim 1, characterised in that: The elastic taper ring is in the form of a ring, the inner side of the elastic taper ring is in the form of a taper upwardly arched, the taper of the elastic taper ring is matched with the taper of the upper end of the locking block, a plurality of grooves are formed in the inner ring of the elastic taper ring, the grooves are arranged along the radial direction of the elastic taper ring, and the plurality of grooves are distributed at equal intervals along the circumferential direction of the elastic taper ring.

4. A wind turbine nacelle transformer according to claim 1, characterised in that: One gear rack locking mechanism is arranged on the inner side of the upper layer plate corresponding to the two ends of the gear rack, the gear rack locking mechanism comprises a locking elastic plate and a wedge-shaped buckle, a rectangular hole is formed in the upper layer plate, the locking elastic plate is arranged in the rectangular hole and one end of the locking elastic plate is fixed to one end of the rectangular hole, and the wedge-shaped buckle is fixed to the other end of the locking elastic plate; when the gear rack is slid along the gear rack sliding groove to be engaged with the outer gear ring, the wedge-shaped buckle locks and limits the gear rack.

5. A wind turbine nacelle transformer according to claim 1, characterised in that: Four nut locking mechanisms located on the left and right sides of the upper layer plate of the six nut locking mechanisms are provided with a distance adjusting mechanism, the distance adjusting mechanism comprises an adjusting sliding plate and an adjusting sliding groove, the adjusting sliding groove is formed on the lower side of the upper layer plate in the left-right direction, and the adjusting sliding plate is slidingly arranged in the adjusting sliding groove and can slide left and right in the adjusting sliding groove.

6. A wind turbine nacelle transformer according to claim 1, characterised in that: Six circular recesses are formed on the upper side of the lower layer plate, and four circular recesses located on the left and right sides of the lower layer plate of the six circular recesses are provided with a distance adjusting mechanism.

7. A wind turbine nacelle transformer according to claim 1, characterised in that: The width adjusting mechanism comprises a plurality of width adjusting rods and a plurality of adjusting rod sliding grooves, the upper layer plate and the lower layer plate are respectively formed by a first layer plate and a second layer plate, the first layer plate and the second layer plate are located in the same plane, the first layer plate is provided with a plurality of adjusting rod sliding grooves on the side facing the second side plate, the adjusting rod sliding grooves are arranged along the up-down direction of the upper layer plate or the lower layer plate, a plurality of width adjusting rods are arranged along the up-down direction of the upper layer plate or the lower layer plate, one end of the plurality of width adjusting rods is fixed on the side of the second layer plate facing the first layer plate, and the other end of the plurality of width adjusting rods is correspondingly and slidably arranged in the plurality of adjusting rod sliding grooves.

8. A wind turbine nacelle transformer according to claim 1, characterised in that: The distance adaptive connection mechanism is provided with four groups, and the four groups of distance adaptive connection mechanisms are respectively located at the four corner positions of the upper layer plate and the lower layer plate. Each group of distance adaptive connection mechanisms comprises a connecting pin and a connecting pin hole. Four connecting pin holes are arranged at the four corner positions of the upper layer plate. The connecting pin comprises a cylindrical body and a plurality of groups of conical barbs. A through groove is arranged at the upper end of the cylindrical body to divide the cylindrical body into two parts. The plurality of groups of conical barbs are uniformly distributed on the outer side of the cylindrical body from top to bottom. Each group of conical barbs comprises two conical barbs, which are symmetrically arranged on the side surface of the cylindrical body on both sides of the through groove. The connecting pin hole is a through hole with an inner diameter matching the maximum outer diameter of the connecting pin. A snap ring structure is arranged in the connecting pin hole. The inner diameter of the snap ring structure matches the outer diameter of the cylindrical body. The lower end of the snap ring structure is provided with a conical guide hole structure.

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