Adjustable bridge group for cable transition between main shaft and hub of wind turbine generator

Abstract

The utility model discloses an adjustable bridge group for cable transition between a main shaft hub of a wind turbine generator, which comprises a first bridge which is of a folded plate structure, the first end of the first bridge is arranged at a wire outlet port of a main shaft, and a cable led out from the main shaft is arranged at the wire outlet port; the second bridge frame is of a folded plate structure, the first end of the second bridge frame and the second end of the first bridge frame are connected in a sliding mode to form a U-shaped structure, and the second end of the second bridge frame is detachably connected with the main shaft; and a plurality of wire binding assemblies which are used for binding the cable to the first bridge and the second bridge. According to the adjustable bridge set for cable transition between the main shaft and the hub of the wind turbine generator, the cable led out from the wire outlet port is bound to the upper ends of the first bridge and the second bridge through the wire binding assembly, so that the cable can be directly and stably transited to the hub from the first bridge and the second bridge from the wire outlet port; in addition, the bridge set is simple in structure, low in installation difficulty and convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the technical field of component structures of wind turbines, and more specifically, to an adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine. Background Art

[0002] Various cables in a wind power generating unit are an indispensable part of the wind turbine, playing roles such as communication and power supply. The effective operation of the cables ensures the safety of the unit. As a relatively enclosed space, the hub requires internal lighting and signal cables to pass through the central through-hole of the main shaft and transition to the inside of the hub through the joint surface between the main shaft flange and the hub joint surface.

[0003] The existing cable transition method uses a small hoop on the main shaft flange for point fixation. Since there is a certain height difference between the cable outlet end of the main shaft and the main shaft flange, and between the main shaft flange and the hub inlet end after the hub and the main shaft are installed, the cable transition is in a "wavy" form. As the wind wheel rotates, the unfixed section of the cable will swing due to inertia. Furthermore, the contact parts of the cable with the main shaft and the hub will be worn by friction, resulting in economic losses.

[0004] The existing cable transition method uses a small hoop on the main shaft flange for point fixation. The cable has a minimum bending radius. When the combination of the main shaft and the hub changes, the point fixation method using the small hoop usually conflicts with the minimum bending radius. This makes it difficult to reasonably determine the position and quantity of the fixing points of the small hoop on the main shaft flange during design. During installation, it is necessary to rely on experience to select the fixing point position, which is difficult to install and easily causes cable wear.

[0005] In summary, how to reduce the installation difficulty of the cable and avoid cable wear is an urgent problem for those skilled in the art at present. Summary of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide an adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine, which has a low installation difficulty and can avoid cable wear.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] An adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine, comprising:

[0009] A first bridge, which is a folded plate structure. The first end of the first bridge is arranged at the cable outlet port of the main shaft, and a cable led out from the main shaft is provided at the cable outlet port;

[0010] The second bridge is of a folded plate structure. The first end of the second bridge is slidably connected to the second end of the first bridge and forms a U-shaped structure. The second end of the second bridge is detachably connected to the main shaft.

[0011] There are multiple wire tying assemblies, which are used to tie the cable to the first bridge and the second bridge.

[0012] Preferably, sheet-shaped connecting pieces are provided at the second end of the first bridge and the first end of the second bridge. Waist-shaped holes are provided in the connecting pieces, and the two waist-shaped holes are connected by fasteners. When the fasteners are in a tightened state, the two connecting pieces are fixedly connected. When the fasteners are in a loose state, the two connecting pieces can slide relative to each other.

[0013] Preferably, multiple mounting holes are provided at the second end of the second bridge, and fasteners are provided in the mounting holes to achieve the detachable connection between the second bridge and the main shaft.

[0014] Preferably, an outlet end pipe clamp is provided at the outlet port of the main shaft. A hub is provided on the outer periphery of the main shaft, and a hub flange is provided on the hub. The height of the wire tying assembly on the first bridge is higher than the height of the outlet end pipe clamp, and the height of the wire tying assembly on the second bridge is higher than the height of the hub flange.

[0015] Preferably, multiple mounting holes are provided on the outer periphery of the outlet port of the main shaft, and multiple mounting holes are evenly distributed on the edge of the end face of the main shaft.

[0016] Preferably, reinforcing ribs are provided at each bent section of the first bridge and the second bridge, and the reinforcing ribs are connected to the first bridge and the second bridge by welding.

[0017] Preferably, the bending radian of the first end of the first bridge is smaller than the bending radian of the second end of the second bridge.

[0018] An adjustable bridge group for cable transition between the main shaft hub of a wind turbine provided by the present utility model. The first bridge and the second bridge of the bridge group are slidably connected to each other. The two form a U-shaped structure and are buckled at the outlet port of the main shaft. The cable led out from the outlet port is tied to the upper ends of the first bridge and the second bridge by the wire tying assembly, which can directly and stably transition the cable from the outlet port to the hub through the first bridge and the second bridge, avoiding wear caused by rotation with the main shaft. Moreover, the structure of the bridge group is simple, the installation difficulty is low, and it is convenient to adjust. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0020] Figure 1 Structural schematic diagram of the adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine, the main shaft, and the hub assembly provided by the present invention;

[0021] Figure 2 For Figure 1 Partial enlarged schematic diagram;

[0022] Figure 3 Structural schematic diagram of the adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine provided by the present invention;

[0023] Figure 4 Structural schematic diagram of the first bridge provided by the present invention;

[0024] Figure 5 Structural schematic diagram of the second bridge provided by the present invention.

[0025] Reference numerals:

[0026] 1 - First bridge; 2 - Main shaft; 3 - Second bridge; 4 - Connector; 5 - Kidney-shaped hole; 6 - Fastener; 7 - Outlet end pipe clamp; 8 - Hub; 9 - Hub flange; 10 - Reinforcing rib. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] The core of the present invention is to provide an adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine. This bridge group can stably transition the cable from the outlet port to the hub, avoiding wear caused by rotation with the main shaft, and has a low installation difficulty and is convenient for adjustment.

[0029] It should be noted that the orientation or positional relationship indicated by "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0030] An adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine provided by the present application includes: a first bridge 1, a second bridge 3, and a wire tying assembly.

[0031] Among them, both the first bridge 1 and the second bridge 3 are folded plate structures. The first end of the first bridge 1 is arranged at the cable outlet port of the main shaft 2, and a cable led out from the main shaft 2 is provided at the cable outlet port.

[0032] The first end of the second bridge 3 is slidably connected to the second end of the first bridge 1 to form a U-shaped structure, and the second end of the second bridge 3 is detachably connected to the main shaft 2.

[0033] There are multiple wire tying assemblies, and the wire tying assemblies are used to tie the cable to the first bridge 1 and the second bridge 3.

[0034] Specifically, a cable outlet port is arranged at the central position of one end face of the main shaft 2, and a cable led out from the inside of the main shaft 2 is provided at the cable outlet port. Both the first bridge 1 and the second bridge 3 include three sheet-like structures, and different angles are formed between the three sheet-like structures. The first end of the first bridge 1 is arranged at the cable outlet port, and preferably, it is detachably connected. The first end of the second bridge 3 is slidably connected to the second end of the first bridge 1, and the two are combined into a U-shaped structure. The second end of the second bridge 3 is generally arranged at the edge of the end face of the main shaft 2. The cable is tied along the first bridge 1 and the second bridge 3 through the wire tying assembly. It should be noted that there are multiple tying assemblies. By tying at multiple ends, the freedom degree of the cable can be effectively restricted, inertial whipping can be reduced, so that the cable can be stably transitioned to the hub 8 after being led out from the cable outlet port, avoiding wear caused by rotation with the main shaft 2. Moreover, the structure of the bridge group is simple, the installation difficulty is low, and it is convenient to adjust.

[0035] Optionally, both the first bridge 1 and the second bridge 3 can be made of steel plates to ensure the structural strength.

[0036] On the basis of the above embodiment, sheet-like connecting pieces 4 are provided at the second end of the first bridge 1 and the first end of the second bridge 3. Waist holes 5 are provided on the connecting pieces 4, and the two waist holes 5 are connected by fasteners 6. When the fasteners 6 are in a tightened state, the two connecting pieces 4 are fixedly connected. When the fasteners 6 are in a loose state, the two connecting pieces 4 can slide relative to each other.

[0037] Specifically, a connecting member 4 is provided at the second end of the first bridge 1 and the first end of the second bridge 3, so that the cross-sections of the second end of the first bridge 1 and the first end of the second bridge 3 are both L-shaped, and they are arranged in a fitting manner. The connecting member 4 is provided with oblong holes 5 extending in the horizontal direction, and fasteners 6 are provided in the two oblong holes 5. The connection between the first bridge 1 and the second bridge 3 is realized through the fasteners 6, and the tightness of the fasteners 6 can be adjusted. When in the tightened state, the first bridge 1 and the second bridge 3 cannot move relative to each other. When in the relaxed state, it is necessary to ensure that the fasteners 6 do not fall out of the oblong holes 5. The first bridge 1 and the second bridge 3 can move relative to each other along the horizontal direction until adjusted to meet the length requirements.

[0038] Optionally, the connecting member 4 can be made of a steel plate, and the connecting member 4 and the first bridge 1 or the second bridge 3 can be an integral structural member, which is convenient for mass production.

[0039] Optionally, the fasteners 6 can be nuts and screws, which are convenient for adjusting the tightness.

[0040] On the basis of the above embodiments, a plurality of mounting holes are provided at the second end of the second bridge 3, and fasteners 6 are provided in the mounting holes to realize the detachable connection between the second bridge 3 and the main shaft 2.

[0041] Specifically, a mounting piece is provided at the second end of the second bridge 3, and a plurality of mounting holes are provided on the mounting piece. The number of the mounting holes is preferably three, which is convenient for fine adjustment in the direction. A fastener 6 is provided in each mounting hole, and the three mounting holes are evenly arranged, which can prevent the second end of the second bridge 3 from deflecting. Since the second bridge 3 hardly deflects after installation, only one mounting hole can be provided at the first end of the corresponding first bridge 1, which is convenient for adjusting the position of the first bridge 1.

[0042] In some embodiments, a wire outlet end pipe clamp 7 is provided at the wire outlet port of the main shaft 2, a hub 8 is provided on the outer periphery of the main shaft 2, a hub flange 9 is provided on the hub 8, the height of the wire tying assembly on the first bridge 1 is higher than the height of the wire outlet end pipe clamp 7, and the height of the wire tying assembly on the second bridge 3 is higher than the height of the hub flange 9.

[0043] Specifically, the height and bending angle of the first bridge 1 meet the requirements of the cable bending radius, and the first fixing point of the cable near the wire outlet end is higher than the height of the wire outlet end pipe clamp 7 of the main shaft 2. The height and bending angle of the second bridge 3 meet the requirements of the cable bending radius, and the position of the first fixing point of the cable near the hub flange 9 is higher than the height of the hub flange 9, so as to effectively avoid the edge contact of the cable at the wire outlet end and when the cable transitions to the hub 8.

[0044] On the basis of the above embodiments, a plurality of mounting holes are provided on the outer periphery of the wire outlet port of the main shaft 2, and a plurality of mounting holes are evenly distributed on the edge of the end face of the main shaft 2.

[0045] Specifically, mounting holes corresponding to the first bridge 1 and the second bridge 3 are provided on the outer periphery and the edge of the end face of the cable outlet port of the main shaft 2. By placing the mounting holes in correspondence and using fasteners 6, the installation of the first bridge 1 and the second bridge 3 can be achieved. It should be noted that the mounting holes provided on the cable outlet port and the edge of the end face of the main shaft 2 are evenly arranged on the cable outlet port and the edge of the end face, so as to facilitate the adjustment of the positions of the first bridge 1 and the second bridge 3 and realize the transition of the cable to different positions.

[0046] In some embodiments, reinforcing ribs 10 are provided on each bending section of the first bridge 1 and the second bridge 3, and the reinforcing ribs 10 are connected to the first bridge 1 and the second bridge 3 by welding.

[0047] Specifically, reinforcing ribs 10 are fixed to each bending section of the first bridge 1 and the second bridge 3 by welding. The structural strength is improved through the reinforcing ribs 10 to prevent the cables tied to the first bridge 1 and the second bridge 3 from shaking.

[0048] In some embodiments, the bending radian of the first end of the first bridge 1 is smaller than the bending radian of the second end of the second bridge 3.

[0049] Specifically, after the cable is led out from the cable outlet port, it should be as close as possible to the central axis of the main shaft 2 within a certain distance to prevent the reduction of the service life caused by excessive bending. Therefore, the bending radian of the first end of the first bridge 1 should be as small as possible. For the second end of the second bridge 3, its bending radian should be larger than that of the first end of the first bridge 1 to facilitate the transition of the cable to the hub 8.

[0050] In this specification, the various embodiments are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0051] The above has introduced in detail an adjustable bridge group for cable transition between the main shaft and the hub of a wind turbine provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An adjustable bridge assembly for cable transition between main shaft hubs of wind turbines, characterized in that: include: The first bridge (1) is a folded plate structure, wherein a first end of the first bridge (1) is arranged at a line outlet port of the main shaft (2), and a cable led out from the main shaft (2) is arranged at the line outlet port; The second bridge frame (3) is a folding plate structure, the first end of the second bridge frame (3) is slidably connected to the second end of the first bridge frame (1) to form a U-shaped structure, and the second end of the second bridge frame (3) is detachably connected to the main shaft (2); A plurality of wire binding assemblies are provided, and the wire binding assemblies are used to bind the cables to the first bridge frame (1) and the second bridge frame (3).

2. The adjustable bridge assembly for cable transition between main shaft hubs of wind turbines according to claim 1 is characterized in that: The second end of the first bridge (1) and the first end of the second bridge (3) are both provided with a sheet-shaped connecting piece (4), the connecting piece (4) being provided with a waist hole (5), the two waist holes (5) being connected by a fastener (6), the two connecting pieces (4) being fixedly connected when the fastener (6) is in a tightened state, and the two connecting pieces (4) being able to slide relative to each other when the fastener (6) is in a loose state.

3. The adjustable bridge assembly for cable transition between main shaft hubs of wind turbines according to claim 2 is characterized in that: The second end of the second bridge (3) is provided with a plurality of mounting holes, and the fasteners (6) are arranged in the mounting holes to achieve a detachable connection between the second bridge (3) and the main shaft (2).

4. The adjustable bridge assembly for cable transition between main shaft hubs of wind turbines according to claim 1, characterized in that: The outlet port of the main shaft (2) is provided with an outlet pipe clamp (7), the outer circumference of the main shaft (2) is provided with a hub (8), the hub (8) is provided with a hub flange (9), the height of the wire binding assembly on the first bridge (1) is higher than the height of the outlet pipe clamp (7), and the height of the wire binding assembly on the second bridge (3) is higher than the height of the hub flange (9).

5. The adjustable bridge assembly for cable transition between main shaft hubs of wind turbines according to claim 4 is characterized in that: A plurality of mounting holes are arranged on the outer periphery of the outlet port of the main shaft (2), and a plurality of the mounting holes are evenly distributed on the edge of the end surface of the main shaft (2).

6. The adjustable bridge assembly for cable transition between main shaft hubs of wind turbines according to claim 1, characterized in that: Each bending section of the first bridge frame (1) and the second bridge frame (3) is provided with a reinforcing rib (10), and the reinforcing rib (10) and the first bridge frame (1) and the second bridge frame (3) are connected by welding.

7. The adjustable bridge assembly for cable transition between main shaft hubs of wind turbines according to claim 1, characterized in that: The bending arc of the first end of the first bridge (1) is smaller than the bending arc of the second end of the second bridge (3).

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