CN217873129U - A protection device and wind generating set for protecting aerogenerator cable - Google Patents

Abstract

The application provides a protection device and wind generating set for protecting aerogenerator cable. The cable of the wind power generator includes a twisted cable segment connected to the nacelle and twisted with the rotation of the nacelle and a redundant segment connected below the twisted cable segment. The protection device comprises a support rod, a first cable clamping block and a second cable clamping block. The support rods are arranged to be fixed relative to the tower of the wind driven generator and extend parallel to the twisted cable sections. The first cable clamping block is relatively fixed with the support rod in the direction around the support rod and is used for clamping and fixing the position where the twisted cable section is connected with the redundant section. The second cable clamping block is rotatably arranged at the top of the supporting rod and is relatively fixed with the supporting rod in the extending direction of the supporting rod. The second cable clamping block is used for clamping the twisted cable section. The utility model provides a protection device has solved the winding friction problem between the cable, has reduced the possibility that the cable rocked, has avoided the emergence of cable collision friction accident, ensures wind generating set even running.

Description

A protection device and wind generating set for protecting aerogenerator cable

Technical Field

The application relates to the technical field of wind power generation equipment, in particular to a protection device for protecting a wind driven generator cable and a wind driven generator set.

Background

During the operation of the wind driven generator, in order to utilize wind resources to the maximum extent, the nacelle rotates along with the change of the wind direction, and the blades are arranged facing the wind. The cable in the wind driven generator extends downwards from the generator in the engine room and is paved downwards in the tower along the gravity direction. During the rotation of the nacelle, the cables will also twist and sway with it. The cable and the cable are twisted and wound mutually to generate friction, so that the outer insulating protection layer of the cable is abraded, and heat dissipation is influenced. Before the cable is connected to relevant equipment at the bottom of the tower barrel, a redundant section is arranged to be used as a buffer, and the cable is twisted from top to bottom, so that an accumulation amplification effect is generated at the bottom of the tower barrel, the cables in the redundant section are wound tightly, and great harm is caused. The twisting of the cable can cause sliding displacement in the vertical direction, and the cable can generate friction and collision with a ladder, a platform, the inner wall of the tower barrel and other accessory equipment in the tower barrel of the wind driven generator when sliding and shaking, so that the abrasion of the cable is aggravated.

In order to avoid the cables from twisting together during twisting, a separating device is usually used in the prior art to be sleeved on the cables, so as to separate the cables and ensure the gaps between the cables. However, the technical scheme cannot solve the problem that the cable in the redundant section is twisted seriously, and the separating device can shake along with the shaking of the cable, so that the problem of collision and friction is still solved. When the cables are twisted, the stress of each cable is different, and the separating device is inclined on the horizontal plane, so that the separating effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a protection device and wind generating set for protecting aerogenerator cable that performance is more excellent, the effect is better.

One aspect of the present application provides a protection device for protecting a cable of an aerogenerator, the cable including a twisted cable segment connected to a nacelle of the aerogenerator and twisted with rotation of the nacelle and a redundant segment connected below the twisted cable segment, the protection device including:

the supporting rod is arranged to be relatively fixed with a tower barrel of the wind driven generator and extends in parallel with the twisted cable section;

the first cable clamping block is arranged on the supporting rod in a sliding mode along the extending direction of the supporting rod and is relatively fixed with the supporting rod in the direction around the supporting rod, and the first cable clamping block is used for clamping and fixing the connecting position of the twisted cable section and the redundant section; and

the second cable clamping block is rotatably arranged at the top of the supporting rod and is relatively fixed with the supporting rod in the extending direction of the supporting rod; the second cable clamping block is used for clamping the twisted cable section.

Further, one of the support rod and the first cable clamping block is provided with a boss, the other one of the support rod and the first cable clamping block is provided with a groove, the boss is matched with the groove, is in limited fit in the direction around the support rod, and is in sliding fit in the extending direction of the support rod.

Furthermore, a through hole is formed in the supporting rod, and the through hole penetrates through the supporting rod along the extending direction of the supporting rod.

Furthermore, the protection device also comprises a separating ring which is rotatably arranged on the supporting rod and is relatively fixed with the supporting rod in the extending direction of the supporting rod;

the separating ring is provided with a plurality of separating spaces, and the plurality of separating spaces are used for the plurality of cables in the twisted cable section to correspondingly penetrate through one by one.

Furthermore, the separating ring comprises a central ring and a plurality of separating rods, the central ring is rotatably sleeved on the supporting rod, the separating rods are arranged around the supporting rod, one ends of the separating rods are connected with the central ring, the other ends of the separating rods are free ends, and the separating space is formed by a gap between two adjacent separating rods.

Further, the interval between two adjacent separated spaces is set to be larger than or equal to the electric gap of the cable passing through the two separated spaces.

Further, the separating ring further comprises a reinforcing ring, the reinforcing ring and the central ring are concentric and arranged around the central ring, and the plurality of separating rods are connected to the reinforcing ring.

Further, first cable clamp splice is including dismantling center disk and the grip ring of connection, the center disk cover is established outside the bracing piece, the grip ring encircles the center disk, and sets up to split type structure, the outward flange department of center disk is equipped with a plurality of first holes along circumference distribution, the inward flange of grip ring is equipped with a plurality of second holes, first hole with second hole one-to-one intercommunication for will turn round many cables in the cable section and be fixed in one-to-one the centre gripping in first hole with the second is downthehole.

Further, the clamping ring comprises a plurality of clamping blocks which are arranged in a split mode, the clamping blocks are provided with the second holes, and installation gaps are reserved between the adjacent clamping blocks.

Another aspect of the present application provides a wind turbine generator system, comprising:

the tower drum is internally provided with a tower drum platform;

the nacelle is rotatably arranged at the top of the tower;

the generator is arranged in the engine room;

a cable including a twisted cable segment connected to the generator and twisted with rotation of the nacelle and a redundant segment connected below the twisted cable segment; and

the protection device of any preceding item, the bracing piece of protection device sets firmly in tower section of thick bamboo platform.

The protection device that this application embodiment provided prescribes a limit to the torsion of cable in twisting the cable section through first cable clamp splice, stops the torsion of redundant section. The problem of winding friction between cables is solved through the clamping of the first cable clamping block and the second cable clamping block to the cables. And, fix first cable clamp splice and second cable clamp splice on the bracing piece, greatly reduced the possibility that the cable rocked, avoided the emergence of cable collision friction accident, ensured wind generating set even running.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a perspective view of one embodiment of the protection device of the present application;

fig. 2 shows an assembly view of a first cable clamp block in the protection device shown in fig. 1;

fig. 3 is a schematic view of a first cable clamp block of the protection device of fig. 1;

FIG. 4 is a schematic view of the divider ring of the protector of FIG. 1;

fig. 5 is a cross-sectional view of a support bar of the protective device shown in fig. 1.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The application provides a protection device for protecting aerogenerator cable, and this protection device can keep apart the wrench movement of twisting the cable section, prevents that redundant section from rocking or intertwine along with twisting the cable section wrench movement and producing.

Specifically, the protection device includes a support bar and a first cable clamp block. The support rods are arranged to be fixed relative to the tower of the wind driven generator and extend parallel to the twisted cable sections. The first cable clamping block is arranged on the supporting rod in a sliding mode along the extending direction of the supporting rod, is relatively fixed with the supporting rod in the direction around the supporting rod and is used for clamping and fixing the position where the cable twisting section is connected with the redundant section.

The application provides a protection device, through first cable clamp splice with the torsion of cable inject in turning round the cable section, stop the torsion of redundant section. The first cable clamping block and the second cable clamping block clamp the cables, so that the problem of winding friction between the cables is solved. And, fix first cable clamp splice and second cable clamp splice on the bracing piece, greatly reduced the possibility that the cable rocked, avoided the emergence of cable collision friction accident, ensured wind generating set even running.

The protection device and the wind turbine generator set of the present application are described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic perspective view of an embodiment of a protection device of the present application.

The cable 203 of the wind power generator is used for transmitting power, and the cable 203 comprises a twisted cable section 201 and a redundant section 202. Wherein the twisted cable section 201 is connected to the nacelle of the wind turbine, in particular to a generator within the nacelle. The twisted cable segment 201 extends from top to bottom from the cabin and twists along with the rotation of the cabin, and the redundant segment 202 is located below the twisted cable segment 201. When the twisted cable segment 201 is twisted, the twisted cable segment 201 can be extended adaptively through the redundant segment 202, so as to avoid pulling the twisted cable segment 201 or limit the twisting of the twisted cable segment 201, and the redundant segment 202 is generally bent to play a role in buffering.

It is noted that the number of cables in the twisted cable segment 201 and the redundant segment 202 may be multiple, including but not limited to power lines, neutral lines, signal lines, etc.

The present embodiment provides a protection device 100, and the protection device 100 includes a support rod 110, a first cable clamp block 120, and a second cable clamp block 130. The support rod 110 is used for supporting the first cable clamping block 120, and the first cable clamping block 120 and the second cable clamping block 130 are used for clamping and fixing the cable 203. In particular, the support bar 110 is arranged to remain fixed relative to the tower of the wind turbine and extends parallel to the twisted cable segments 201. For example, the support rod 110 may be fixed to a platform within the tower, extending along the height of the tower. The first cable clamp block 120 is slidably disposed on the support rod 110 along an extending direction of the support rod 110, and is fixed relative to the support rod 110 in a direction surrounding the support rod 110. The first cable clamping block 120 is used for clamping and fixing the position where the twisted cable segment 201 is connected with the redundant segment 202. So configured, at the position where the twisted cable segment 201 meets the redundant segment 202, the cable 203 is clamped by the first cable clamp block 120. Because the first cable clamping block 120 can only slide along the extending direction of the supporting rod 110, and is relatively fixed with the supporting rod 110 in the circumferential direction of the supporting rod 110, even if the twisted cable section 201 is twisted, the twisting can be isolated by the first cable clamping block 120, the twisting of the redundant section 202 along with the twisted cable section is not caused, the accumulation amplification effect of the twisting at the redundant section 202 is avoided, the generation of severe friction or mutual winding between strands of cables of the redundant section 202 is avoided, and good heat dissipation is facilitated. Meanwhile, a large redundancy amount at the redundant section 202 is not required to be reserved for torsion, the length of the required cable is greatly shortened, and the cost is saved. In addition, the first cable clamping block 120 clamps the cable 203, so that the shaking of the cable 203 is greatly relieved, the collision friction accident of the cable 203 is reduced, and the stable operation of the wind generating set is facilitated. The second cable clamp block 130 is rotatably disposed on the top of the support rod 110 and is fixed relative to the support rod 110 in the extending direction of the support rod 110. The second cable clamping block 130 and the supporting rod 110 may be connected by a sliding bearing, or may be connected by other connection methods, which is not limited in this application. Through the clamping force of the second cable clamping block 130, the plurality of cables in the twisted cable section 201 can be kept relatively fixed with the second cable clamping block 130 at the clamped position, and the risk of mutual winding among the plurality of cables in the twisted cable section 201 is reduced. In addition, the second cable clamping block 130 is used in cooperation with the first cable clamping block 120, so that the shaking amount of the twisted cable section 201 in the twisting process is remarkably reduced, and the risk of mutual winding friction among a plurality of cables in the twisted cable section 201 is remarkably reduced.

As shown in fig. 2 and 3, the first cable clamping block 120 is arranged to slide along the extending direction of the support rod 110, so as to ensure the smooth twisting of the twisted cable segment 201. For example, when the twisted cable segment 201 is twisted, the redundant segment 202 is required to compensate for the increase of the length during twisting, and the sliding arrangement of the first cable clamp block 120 can well cope with the length change of the twisted cable segment 201, so as to reduce the pulling of the cable. The sliding distance of the first cable clamp 120 along the extending direction of the support rod 110 can be set according to practical application scenarios. For example, the determination may be performed by simulation calculation according to an actual application scenario. The distance is larger than the distance of the cable twisting segment 201 moving upwards at the connection of the cable twisting segment 201 and the redundant segment 202 under the condition of extreme twisting.

In some embodiments, one of the support rod 110 and the first cable clamp block 120 is provided with a boss 111, and the other is provided with a groove 121 (in fig. 2 and 3, the support rod 110 is provided with the boss 111, and the first cable clamp block 120 is provided with the groove 121), the boss 111 is disposed in the groove 121, is engaged with the groove 121, can be engaged in a limited manner in a direction around the support rod 110, and can be engaged in a sliding manner in an extending direction of the support rod 110. By adopting the scheme, the first cable clamping block 120 can be kept relatively fixed with the support rod 110 in the direction surrounding the support rod 110, the first cable clamping block 120 can slide along the support rod 110, the structure is simple, the production and the manufacture are easy, and a guiding effect can be provided for the sliding of the first cable clamping block 120. In other embodiments, the support rod 110 may be provided with a groove 121, and the first cable clamp block 120 may be provided with a boss 111. Of course, the support rod 110 and the first cable clamp block 120 may also be slidably engaged through other structures, which is not limited in this application.

In some embodiments, the first cable clamp block 120 includes a center plate 122 and a clamp ring 123 that are removably connected. Wherein, the center of the central disc 122 is provided with a mounting hole 129, and the support rod 110 passes through the mounting hole 129, so that the central disc 122 is sleeved outside the support rod 110. The clamping ring 123 is disposed around the outer side of the central plate 122, and a split structure is disposed between the clamping ring and the central plate. A plurality of first holes 124 distributed along the circumferential direction are arranged at the outer edge of the central disc 122, namely the outer side surface of the central disc 122 facing the clamping ring 123, a plurality of second holes 125 are arranged at the inner edge of the clamping ring 123 and the inner side surface of the clamping ring 123 facing the central disc 122, and the first holes 124 and the second holes 125 are communicated in a one-to-one correspondence manner and are used for clamping and fixing a plurality of cables in the cable twisting section 201 in the first holes 124 and the second holes 125. That is to say, twist cable section 201 and be held in the space that central disc 122 and grip ring 123 enclose jointly, so set up, need not to adopt the mode of penetrating will twist cable section 201 and pass first cable clamp splice 120, but can put a plurality of cables in twisting cable section 201 in first hole 124 one-to-one earlier, then link grip ring 123 in the central disc 122 outside, make first hole 124 and second hole 125 one-to-one communicate, through a plurality of cables in grip ring 123 fixed twist cable section 201 of centre gripping, conveniently will twist cable section 201 and hold in first cable clamp splice 120.

The clamping ring 123 may be assembled with the central plate 122 by means of a screw or the like, but is not limited thereto. The rubber protective layer of the cable has elasticity, the thickness of the cable from head to tail is not completely consistent, and the expansion joint 131 can be left after the clamping ring 123 and the central disc 122 are assembled, so that the clamping reliability is ensured.

As shown in fig. 3, the first hole 124 and the second hole 125 may be configured as semicircular holes, and the first hole 124 and the second hole 125 are connected to form a circular hole, but not limited thereto. In other embodiments, the first hole 124 and the second hole 125 may be spliced into holes of other shapes, including but not limited to an elliptical hole, a rectangular hole, and a triangular hole, so as to be applied in more practical scenarios. For example, an elliptical hole may be applied in a scenario where at least two cables are passed through.

In some embodiments, a clamping assembly may be added to the first and second holes 124 and 125 to more securely clamp and secure the cable. In other embodiments, the first and second holes 124, 125 may have embossments, threads, etc. disposed therein to increase the roughness of the inner surface of the holes for gripping the cable.

In some embodiments, the clamping ring 123 includes a plurality of clamping blocks 126 arranged in a split manner, the plurality of clamping blocks 126 are arranged along the circumferential direction of the central plate 122, and the plurality of clamping blocks 126 are provided with second holes 125 and are connected to the central plate 122. In this embodiment, the clamping ring 123 is of a split structure, and a plurality of cables of the twisted cable section 201 do not need to pass through the clamping ring 123, and only each split part of the clamping ring 123 needs to be directly assembled on the central disk 122, so that the installation process is simplified, and the installation difficulty is reduced. The number of the clamping blocks 126 is not limited, and may be two or more. In this embodiment, the number of the clamping blocks 126 is equal to the number of the first holes 124, that is, each clamping block 126 is provided with one second hole 125 and can clamp one of the cables of the twisted cable segment 201. When the clamping force of the cable needs to be adjusted according to the diameter of the cable, only the corresponding clamping block 126 needs to be adjusted, and therefore the working efficiency is improved. In addition, an installation gap 127 can be reserved between the adjacent clamping blocks 126, so that interference or inconvenience in disassembly between the adjacent clamping blocks 126 during installation is avoided.

In some embodiments, the first cable clamping block 120 may further include lightening holes 128, and the lightening holes 128 may be formed by removing a portion of material, so as to reduce the weight and cost of the first cable clamping block 120.

The second cable clamp block 130 and the first cable clamp block 120 may employ substantially the same structure. The second cable clamping block 130 is different from the first cable clamping block 120 only in that the second cable clamping block 130 does not need to be provided with a groove or a boss, and other parts have the same structure, which is not described herein again.

With continued reference to fig. 1, in some embodiments, the protection device 100 may further include a spacer ring 140, and the spacer ring 140 is rotatably disposed on the support rod 110 and is fixed relative to the support rod 110 in the extending direction of the support rod 110. The separating ring 140 is used to separate the cables of the twisted cable segment 201, so as to prevent the cables from contacting and winding, and facilitate heat dissipation. A spacer ring 140 may be disposed between the first cable clamp block 120 and the second cable clamp block 130. The number of the spacer rings 140 may be one or more, and is not limited. In this embodiment, the plurality of separation rings 140 are disposed at intervals along the twisted cable segment 201, and the number of the separation rings 140 is not limited in this application.

In some embodiments, as shown in fig. 4, the separating ring 140 is provided with a plurality of separating spaces 141, and the plurality of separating spaces 141 are used for the plurality of cables in the twisted cable segment 201 to pass through in a one-to-one correspondence. That is to say, a plurality of cables are separated in different spaces, so as to avoid mutual contact, and avoid the phenomenon that the cables are twisted and entangled when the twisting angle of the twisting section 201 is too large.

In some embodiments, the spacer ring 140 includes a center ring 142 and a plurality of spacer rods 143. The center ring 142 is rotatably sleeved on the supporting rod 110, and the center ring 142 may be connected to the supporting rod 110 by a sliding bearing, but is not limited thereto. A plurality of separating rods 143 are disposed around the support rod 110, one end of each of the plurality of separating rods 143 is connected to the center ring 142, and the other end is a free end, and a gap between two adjacent separating rods 143 forms a separating space 141. The spacer ring 140 has a simple structure and is easy to manufacture and manufacture. In practical applications, the spacer ring 140 can rotate relative to the support rod 110 when the twisted cable segment 201 is twisted, so that the twisting of the twisted cable segment 201 is not limited, and the space between the cables in the twisted cable segment 201 can be maintained.

The center ring 142 may be configured as an annular body having a circular cross-section, and the plurality of separation rods 143 may be configured as rod bodies having a circular cross-section to reduce friction with the twisted cable segment 201, thereby reducing abrasion of the twisted cable segment 201. In addition, in order to prevent the cable from slipping out of the partitioned space 141, the risk of slipping out may be reduced by increasing the length of the separation rod 143, which is selectively set according to the diameter of the cable.

In some embodiments, the spacing between two adjacent compartments 141 is set to be greater than or equal to the electrical gap of the cable passing through the two compartments 141, so as to avoid the electrical performance from being affected by the small spacing between the cable and the cable. In this embodiment, the electrical gap between the cables in the two adjacent partitioned spaces 141 can be increased by increasing the diameter of the separating rod 143.

Optionally, in some embodiments, spacer ring 140 further comprises a stiffening ring 146, wherein stiffening ring 146 is concentric with central ring 142 and disposed about central ring 142, and wherein a plurality of spacer rods 143 are connected to stiffening ring 146. The arrangement is such that the structure of the spacer ring 140 is more stable and can bear larger torque. In order to enhance the strength of the separating ring 140, a plurality of reinforcing rings 146 may be further provided, and the number of the reinforcing rings 146 is not limited in this application.

The first cable clamp block 120, the second cable clamp block 130 and the spacer ring 140 can be assembled, so that the production, the transportation and the installation are convenient.

Optionally, in some embodiments, as shown in fig. 5, a through hole 112 is formed in the supporting rod 110, and the through hole 112 penetrates through the supporting rod 110 along the extending direction of the supporting rod 110. The through hole 112 is used for accommodating small cables such as optical fibers and control cables used in the wind generating set, and the small cables are prevented from being twisted off to cause safety accidents when the cable twisting section 201 is twisted.

The present application further provides a wind turbine generator system, as shown in fig. 1, including: a tower 210, a nacelle (not shown), a generator (not shown), a cable 203, and the protection device 100 described above. Tower drum 210 has tower drum platform 211 disposed therein. A nacelle platform 212 is provided within the nacelle. The nacelle is rotatably disposed atop tower 210. The generator is arranged in the engine room. The cable 203 includes a twisted cable segment 201 connected to the generator and twisted with the rotation of the nacelle and a redundant segment 202 connected below the twisted cable segment 201. The support rod 110 of the protection device 100 is fixedly arranged on the tower platform 211. In some embodiments, the nacelle platform 212 may be provided with a hole in which the outer ring of the second cable clamp block 130 is received, and the shaking of the second cable clamp block 130 and the top end of the support rod 110 is limited by the hole, thereby reducing the shaking amount of the twisted cable section. The outer race of the second cable clamp block 130 may be rotatably disposed within the bore by a bearing.

In a practical application scenario, when the wind generating set generates electricity, the nacelle rotates, the cable 203 twists along with the nacelle, the second cable clamp block 130 rotates around the support rod 110, the separation ring 140 also rotates along with the nacelle, and the first cable clamp block 120 slides upwards due to the twisting of the twisted cable section 201. According to the arrangement, mutual abrasion among cables, friction between the cable and the platform when the cable slides down and impact between the cable and the platform when the cable slides are avoided, the phenomenon that the cable is on fire due to short circuit caused by serious damage is avoided, and stable operation of the wind generating set is ensured.

In some embodiments, the wind generating set is further provided with a cable-untwisting protection program, when the wind generating set is yawed to 540 degrees, the cabin is reversely rotated, the cable is untwisted, the second cable clamp block 130 and the separation ring 140 are reversely rotated, and the first cable clamp block 120 slides downwards. In pursuit of power generation, the wind generating set can continue to yaw after yawing for 540 degrees, but when the wind generating set yaws for 1080 degrees, the cabin is forced to reverse, and accidents caused by excessive twisting of cables are prevented.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. A protection device for protecting a cable of an aerogenerator, the cable comprising a twisted cable section connected to a nacelle of the aerogenerator and twisted following the rotation of the nacelle and a redundant section connected below the twisted cable section, characterized in that it comprises:

the supporting rod is arranged to be relatively fixed with a tower barrel of the wind driven generator and extends in parallel with the twisted cable section;

the first cable clamping block is arranged on the supporting rod in a sliding mode along the extending direction of the supporting rod and is relatively fixed with the supporting rod in the direction around the supporting rod, and the first cable clamping block is used for clamping and fixing the connecting position of the twisted cable section and the redundant section; and

the second cable clamping block is rotatably arranged at the top of the supporting rod and is relatively fixed with the supporting rod in the extending direction of the supporting rod; the second cable clamping block is used for clamping the twisted cable section.

2. The protective device according to claim 1, wherein one of the support bar and the first cable clamp block is provided with a boss, and the other is provided with a groove, and the boss is engaged with the groove, is engaged in a limited manner in a direction around the support bar, and is engaged in a sliding manner in an extending direction of the support bar.

3. A protective device according to claim 1 or 2 wherein the support rod is provided with a through hole extending through the support rod in the direction of extension of the support rod.

4. The protection device according to claim 1 or 2, further comprising a spacer ring rotatably disposed on the support rod and fixed relative to the support rod in the extending direction of the support rod;

the separating ring is provided with a plurality of separating spaces, and the plurality of separating spaces are used for the plurality of cables in the twisted cable section to correspondingly pass through one by one.

5. The protector as claimed in claim 4, wherein said spacer ring includes a central ring and a plurality of spacer rods, said central ring is rotatably sleeved on said support rod, said plurality of spacer rods are arranged around said support rod, one end of said plurality of spacer rods is connected with said central ring, the other end is a free end, and the gap between two adjacent spacer rods forms said separation space.

6. A protective device according to claim 4 wherein the separation of adjacent compartments is such that the electrical separation of cables passing through the compartments is greater than or equal to the electrical separation of cables passing through the compartments.

7. The protective apparatus of claim 5 wherein the spacer ring further comprises a stiffening ring concentric with and disposed about the central ring, the plurality of spacer rods being connected to the stiffening ring.

8. The protection device of any one of claims 1 or 2, wherein the first cable clamp block comprises a center plate and a clamping ring which are detachably connected, the center plate is sleeved outside the support rod, the clamping ring surrounds the center plate and is arranged in a split structure, a plurality of first holes distributed along the circumferential direction are formed in the outer edge of the center plate, a plurality of second holes are formed in the inner edge of the clamping ring, and the first holes are communicated with the second holes in a one-to-one correspondence mode and used for clamping and fixing a plurality of cables in the cable twisting section in the first holes and the second holes one by one.

9. The protective device according to claim 8, wherein the clamping ring comprises a plurality of clamping blocks which are arranged in a split manner, the plurality of clamping blocks are provided with the second holes, and an installation gap is reserved between the adjacent clamping blocks.

10. A wind turbine generator set, comprising:

the tower drum is internally provided with a tower drum platform;

the nacelle is rotatably arranged at the top of the tower;

the generator is arranged in the engine room;

a cable including a twisted cable segment connected to the generator and twisted with rotation of the nacelle and a redundant segment connected below the twisted cable segment; and

the protective device as claimed in any one of claims 1 to 9, wherein the supporting bar of the protective device is fixedly attached to the tower platform.

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