Anti-abrasion device for twisting stopping mechanism of power cable of wind turbine generator

Abstract

A wind turbine generator power cable twist-stopping mechanism anti-abrasion device comprises a tower, a twist-stopping mechanism is installed in the tower and fixed in the tower through a group of twist-stopping frames, the twist-stopping mechanism comprises a twist-stopping plate installed between the group of twist-stopping frames, a plurality of separation holes are formed in the twist-stopping plate, a plurality of anti-abrasion mechanisms are arranged in the separation holes, and the anti-abrasion mechanisms are arranged in the separation holes. The plurality of anti-abrasion mechanisms wrap the cable, each anti-abrasion mechanism comprises an anti-abrasion sliding ball, and the anti-abrasion sliding balls are pressed and fixed in the separation holes through springs; according to the utility model, the sliding friction is changed into rolling friction by changing the forming condition of the sliding friction and increasing the anti-wear sliding beads, and meanwhile, the contact surface between the power cable and the edge of the separation hole of the twist stopping mechanism can be changed into point contact from surface contact, so that the friction area of the power cable is reduced, the wear rate of the power cable is effectively reduced, and the service life of the power cable is prolonged. The safety of the power cable and the safe and stable operation of the whole unit are improved, and the operation and maintenance frequency and time of operation and maintenance personnel on the power cable are correspondingly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine power cable protection, in particular to an anti-wear device for a torsion-stop mechanism of a wind turbine power cable. Background Art

[0002] The generator on top of the tower of the wind turbine generates electricity, which is transmitted to the converter cabinet at the bottom of the tower through the power cable. The cable in the section from the nacelle to the saddle platform uses a torque-stop mechanism to limit the torsion angle of the power cable to prevent the cable from getting tangled. Since the wind turbine needs to yaw to the wind in real time, the power cable moves up and down during yaw. The partition plate of the torque-stop mechanism and the cable frequently produce sliding friction, which causes the outer insulation of the power cable to wear, and there is a risk of power cable damage and fire, which seriously affects the safe and stable operation of the unit. At present, measures such as adding anti-wear materials to the outer insulation layer of the cable are often adopted on site. However, this measure has certain limitations. The anti-wear materials will also be worn out over time, and the anti-wear materials need to be replaced frequently, which increases the workload and operation and maintenance costs of the operation and maintenance personnel.

[0003] At present, there are also related cable anti-wear technologies available, such as CN208386106U, a wind turbine twist cable anti-wear spacer, including a "pin"-shaped bearing, a wire rope guide wheel, a bolt pair, a wire rope lifting ear, and a spacer plate. The eight "pin"-shaped bearings are clamped and limited by upper and lower spacer plates and fixed with a bolt group, and the eight "pin"-shaped bearings are evenly distributed circumferentially in the upper and lower spacer plates; the wire rope guide wheel is fixedly connected to the center of the upper and lower spacer plates by a bolt pair; the eight wire rope lifting ears are fixedly connected to four fixed points on the outer periphery of the upper and lower spacer plates by bolt pairs respectively; the utility model can prevent the wind turbine twist cable from wearing, but the new structure is complex and costly, the workload of modifying the original equipment is large, and the scope of application is limited. At present, the power cable of the wind turbine generator is connected to the generator through a cable connection box, and each cable is basically the same length. When yaw and twist, it will cause different forces on the left and right sides. The "pin"-shaped structure is not completely applicable to the current situation. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an anti-wear device for the anti-twist mechanism of the power cable of a wind turbine generator set, so as to solve the problems that the anti-twist mechanism of the wind turbine generator set in the prior art causes serious wear on the cable, the newly designed anti-wear mechanism has a complex structure, and the workload of modifying the original equipment is large.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a wind turbine power cable anti-twist mechanism anti-wear device, including a tower, a anti-twist mechanism is installed in the tower, the anti-twist mechanism is fixed in the tower through a group of anti-twist frames, the anti-twist mechanism includes a anti-twist plate installed between a group of anti-twist frames, the anti-twist plate is provided with a plurality of partition holes, a plurality of anti-wear mechanisms are arranged in the partition holes, the plurality of anti-wear mechanisms cover the cable, the anti-wear mechanism includes anti-wear sliding beads, and the anti-wear sliding beads are fixed in the partition holes by spring compression.

[0006] In a preferred embodiment, the tower is a hollow cylinder.

[0007] In the preferred solution, one end of the anti-torsion frame is fixed to the inner wall of the tower, and includes a group of vertical rods, a support rod is fixedly installed in the middle of the vertical rods, and a cross rod is detachably installed on the end by bolts. Grooves are provided on the opposite sides of the vertical rods. The anti-torsion plate is inserted into the grooves on a group of vertical rods, fixed between the support rod and the cross rod, and swings up and down and slides back and forth.

[0008] In a preferred solution, the anti-twist plate is evenly arranged with a plurality of partition holes, and the partition holes are configured as upper and lower through holes.

[0009] In a preferred solution, a plurality of slide grooves are evenly opened on the inner wall of the partition hole, an anti-wear mechanism is installed inside the slide groove, and a cover plate is detachably installed on the top of the slide groove, and the cover plate fixes the anti-wear mechanism in the slide groove.

[0010] In a preferred embodiment, the anti-wear mechanism includes anti-wear sliding beads, which are clamped in the slide groove on the inner wall of the partition hole. The anti-wear sliding beads are pressed in the middle by upper and lower springs respectively, and are relatively fixed between the cover plates installed at the bottom and top of the slide groove.

[0011] In a preferred solution, the slide groove is configured as a semi-cylindrical groove, the bottom of the hole is not through, and the chord length of the semi-circular hole opening is smaller than the diameter of the anti-wear sliding bead 51 .

[0012] In a preferred solution, the lower end of the lower spring is fixed to the bottom of the slide groove, and the upper end is pressed against the anti-wear slide bead but not fixed.

[0013] In a preferred solution, the upper end of the upper spring is fixed to the bottom of the cover plate, and the lower end is pressed against the anti-wear sliding bead but not fixed.

[0014] In a preferred solution, the cover plate is provided with a plurality of observation holes and bolt holes, the anti-twist plate is provided with threaded holes, and the cover plate and the anti-twist plate are fixed together by bolt connection.

[0015] The utility model provides a wind turbine power cable anti-twist mechanism anti-wear device, which has the following beneficial effects:

[0016] 1. The utility model solves the problem that the anti-twist mechanism of the wind turbine generator set in the prior art causes serious wear on the cable, and the newly designed anti-wear mechanism has a complex structure and requires a lot of work to transform the original equipment;

[0017] 2. The utility model changes the conditions for the formation of sliding friction and adopts the method of adding anti-wear sliding beads, thereby changing the sliding friction into rolling friction, reducing the degree of friction. At the same time, the contact surface between the power cable and the edge of the separation hole of the anti-torsion mechanism can be changed from surface contact to point contact, reducing the wear area of ​​the power cable, achieving the target effect of reducing the wear rate of the power cable and extending the service life of the power cable;

[0018] 3. The structural design of the anti-twist frame of the utility model realizes the relative sliding and twisting between the anti-twist frame and the partition plate, compensating for the twisting of the cable, thereby further removing the twisting force and twisting moment of the cable;

[0019] 4. The utility model sets the separation hole, and places the power cable in the separation hole, so as to ensure that the power cable will not be tangled when the wind turbine is yawed to the wind;

[0020] 5. The setting of the slide groove on the partition hole of the utility model provides installation space for the anti-wear slide bead, and is easy to manufacture. The partition hole of the original anti-twist mechanism can be directly used without remaking it and increasing the high investment;

[0021] 6. The structure of the anti-wear sliding bead and spring assembly of the utility model can make the anti-wear sliding bead relatively fixed in the slide groove, and can rotate relatively with the cable, so as to release and decompose the torsion on the cable, and convert the sliding friction, cutting and surface contact between the cable and the separation hole into rotational friction, without cutting and point contact, effectively avoiding the wear and cut of the cable;

[0022] 7. The structural design of the semi-circular cylindrical hole of the slide groove of the utility model allows the anti-wear sliding bead to be installed without falling, and is limited by the opening smaller than the diameter of the anti-wear sliding bead, so that it cannot fall out to the left or right, thereby not affecting the normal use of the anti-wear sliding bead;

[0023] 8. The setting of the cover plate of the utility model not only fixes the anti-wear sliding beads and the spring, but also facilitates installation, maintenance and replacement;

[0024] 9. The utility model has an exquisite design and a simple structure. It effectively solves the problem of severe wear of the power cable and the anti-twist mechanism, effectively reduces the wear rate of the power cable, improves the safety of the power cable and the stability of the safe operation of the entire unit, and correspondingly reduces the operation and maintenance costs of the operation and maintenance personnel on the power cable. It has a wide range of applications and is suitable for all models and types of anti-twist mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and implementation examples:

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the assembly of the tower and the anti-torsion frame of the utility model;

[0028] Figure 3 It is a schematic diagram of the assembly of the anti-twist plate and the anti-wear mechanism of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the cover plate of the utility model;

[0030] In the figure: tower 1, anti-twist frame 2, anti-twist plate 3, partition hole 4, anti-wear mechanism 5, cable 6, slide chute 7, cover plate 8, vertical rod 21, support rod 22, cross rod 23, anti-wear sliding ball 51, upper spring 52, lower spring 53. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0032] like Figures 1 to 4 As shown, a wind turbine power cable anti-twist mechanism anti-wear device comprises a tower 1, in which a anti-twist mechanism is installed, the anti-twist mechanism is fixed in the tower 1 through a group of anti-twist frames 2, the anti-twist mechanism comprises a anti-twist plate 3 installed between a group of anti-twist frames 2, the anti-twist plate 3 is provided with a plurality of partition holes 4, the partition holes 4 are provided with a plurality of anti-wear mechanisms 5, the plurality of anti-wear mechanisms 5 cover cables 6, the anti-wear mechanisms 5 comprise anti-wear beads 51, and the anti-wear beads 51 are fixed in the partition holes 4 by spring compression.

[0033] In this embodiment, the tower 1 is a hollow cylinder.

[0034] Furthermore, one end of the anti-torsion frame 2 is fixed to the inner wall of the tower 1, and includes a group of vertical rods 21, a support rod 22 is fixedly installed in the middle of the vertical rods 21, and a cross rod 23 is detachably installed at the end by bolts. Grooves are provided on the opposite sides of the vertical rods 21, and the anti-torsion plate 3 is inserted into the grooves on the group of vertical rods 21, fixed between the support rod 22 and the cross rod 23, and swings up and down and slides back and forth.

[0035] Furthermore, the anti-twist plate 3 is evenly arranged with a plurality of partition holes 4, and the partition holes 4 are configured as upper and lower through holes.

[0036] Furthermore, a plurality of slide grooves 7 are evenly formed on the inner wall of the partition hole 4 , an anti-wear mechanism 5 is installed inside the slide groove 7 , and a cover plate 8 is detachably installed on the top of the slide groove 7 , and the cover plate 8 fixes the anti-wear mechanism 5 in the slide groove 7 .

[0037] Furthermore, the anti-wear mechanism 5 includes an anti-wear sliding ball 51, which is clamped in the slide groove 7 on the inner wall of the partition hole 4. The anti-wear sliding ball 51 is pressed in the middle by the upper spring 52 and the lower spring 53 respectively, and is relatively fixed between the cover plate 8 installed at the bottom and top of the slide groove 7.

[0038] Furthermore, the slide groove 7 is configured as a semi-circular cylindrical groove, the bottom of the hole is not through, and the chord length of the semi-circular hole opening is smaller than the diameter of the hole.

[0039] Furthermore, the lower end of the lower spring 53 is fixed to the bottom of the slide groove 7, and the upper end is pressed against the anti-wear slide bead 51 but not fixed.

[0040] Furthermore, the upper end of the upper spring 52 is fixed to the bottom of the cover plate 8 , and the lower end is pressed against the anti-wear sliding bead 51 but not fixed.

[0041] Furthermore, the cover plate 8 is provided with a plurality of observation holes and bolt holes, the anti-twist plate 3 is provided with threaded holes, and the cover plate 8 and the anti-twist plate 3 are fixed together by bolt connection.

[0042] When used specifically: After the ground installation and debugging of a wind turbine power cable anti-twist mechanism anti-wear device is qualified, when it is put into use, the anti-twist plate 3 with the installed anti-twist mechanism 5 and the cable 6 are assembled, the anti-twist plate 3 is inserted between a group of vertical rods 21 of the anti-twist frame 2, and then the cross bar 23 and a group of vertical rods 21 are fixed by bolts, and the anti-twist plate 3 is locked in the anti-twist frame 2. Each cable 6 is separated and straightened. After confirmation, the cable 6 is connected to the generator through the cable connection box. A wind turbine power cable anti-twist mechanism anti-wear device starts to work. When the wind turbine yaws and twists, the power The cable 6 twists in the partition hole 4, and the anti-wear beads 51 on the anti-wear mechanism 5 in the partition hole 4 slide under the torsional force of the cable 6, thereby releasing and decomposing the torsional force of the cable 6, and also separating the cable 6 from the hole edge of the partition hole 6, thereby effectively avoiding the wear and cutting of the cable 6 by the hole wall and hole edge of the partition hole 4. As the wind turbine twists in yaw, an anti-wear device for the anti-twist mechanism of the power cable of the wind turbine set works all the time, thereby reducing the wear rate of the power cable, improving the safety of the power cable and the stability of the safe operation of the entire unit, and always ensuring that the force on the cables 6 on both sides is uniform when the wind turbine twists in yaw.

[0043] In a preferred solution, the tower 1 is a hollow cylinder; the above arrangement is conducive to the subsequent installation of an anti-twist mechanism and provides a larger torsion space for the cable 6 during the yaw of the wind turbine.

[0044] In the preferred scheme, one end of the anti-torsion frame 2 is fixed to the inner wall of the tower 1, including a group of vertical rods 21, a support rod 22 is fixedly installed in the middle of the vertical rods 21, and a cross rod 23 is detachably installed on the end by bolts. Grooves are provided on the opposite sides of the vertical rods 21, and the anti-torsion plate 3 is inserted into the grooves on a group of vertical rods 21, fixed between the support rod 22 and the cross rod 23, and swings up and down and slides back and forth. The above arrangement makes the anti-torsion plate 3 relatively fixed while having a certain twisting and sliding space, so that the twisting force of the cable 6 can be further released.

[0045] In the preferred solution, the anti-twist plate 3 is evenly arranged with a number of partition holes 4, and the partition holes 4 are set as upper and lower through holes; the above setting allows the cables 6 to be separated, effectively preventing them from being entangled and twisted together, wearing each other, and knotting, thereby causing damage and fire, and further affecting the normal operation of the wind turbine.

[0046] In the preferred solution, a number of slide grooves 7 are evenly opened on the inner wall of the partition hole 4, an anti-wear mechanism 5 is installed inside the slide groove 7, and a cover plate 8 is detachably installed on the top of the slide groove 7, and the cover plate 8 fixes the anti-wear mechanism 5 in the slide groove 7; the above arrangement enables the anti-wear mechanism 5 to be installed and fixed while the anti-wear function can be realized.

[0047] In the preferred scheme, the anti-wear mechanism 5 includes an anti-wear sliding bead 51, which is clamped in the slide groove 7 on the inner wall of the partition hole 4. The anti-wear sliding bead 51 is pressed and fixed in the middle by the upper spring 52 and the lower spring 53 respectively, and is relatively fixed between the cover plate 8 installed at the bottom and top of the slide groove 7; the above arrangement enables the anti-wear function of the anti-wear mechanism 5 to be realized, and the sliding friction between the cable 6 and the partition hole 4 and the cutting of the edge of the hole are converted into rolling friction, thereby preventing the cutting of the cable 6 by the edge of the hole, and effectively avoiding wear and cuts on the cable 6.

[0048] In a preferred embodiment, the slide groove 7 is configured as a semi-cylindrical groove, the bottom of the hole is not through, and the chord length of the semi-circular hole opening is smaller than the diameter of the anti-wear sliding bead 51; the above configuration allows the anti-wear sliding bead 51 to be relatively fixed while being able to slide relatively.

[0049] In the preferred scheme, the lower end of the lower spring 53 is fixed to the bottom of the slide groove 7, and the upper end is pressed but not fixed to the anti-wear sliding bead 51; the above arrangement allows the lower spring 53 to be fixed while pressing the anti-wear sliding bead 51, and at the same time allows the anti-wear sliding bead 51 to rotate relatively in the hole, thereby preventing the inner wall and edge of the hole from wearing and cutting the cable 6.

[0050] In the preferred scheme, the upper end of the upper spring 52 is fixed to the bottom of the cover plate 8, and the lower end is pressed but not fixed to the anti-wear sliding bead 51; the above arrangement allows the upper spring 52 to be fixed while pressing the anti-wear sliding bead 51, and at the same time allows the anti-wear sliding bead 51 to rotate relatively in the hole, thereby preventing the inner wall and edge of the hole from wearing and cutting the cable 6.

[0051] In the preferred scheme, the cover plate 8 is provided with a plurality of observation holes and bolt holes, the anti-torsion plate 3 is provided with threaded holes, and the cover plate 8 and the anti-torsion plate 3 are fixed together by bolts; the above arrangement enables the upper spring 52, the anti-wear sliding bead 51 and the lower spring 53 to be fixed while pressing the anti-wear sliding bead 51, and at the same time, the anti-wear sliding bead 51 can rotate relatively in the hole, thereby preventing the inner wall and edge of the hole from wearing and cutting the cable 6, and facilitating the installation, disassembly and later maintenance and replacement of the upper spring 52, the anti-wear sliding bead 51 and the lower spring 53.

[0052] In summary, the present invention uses a new type of anti-wear device for the anti-twist mechanism of the power cable of a wind turbine generator set, which solves the problem of the existing wind turbine generator set anti-twist mechanism causing serious cable wear. The newly designed anti-wear mechanism has a complex structure and a large workload for the original equipment modification. By changing the conditions for the formation of sliding friction, the anti-wear beads 51 are added to change the sliding friction into rolling friction, thereby reducing the degree of friction. At the same time, the contact surface between the power cable 6 and the edge of the separation hole 4 of the anti-twist mechanism can be changed from surface contact to point contact, thereby reducing the wear area of ​​the power cable 6, achieving the target effect of reducing the wear rate of the power cable 6, and extending the life of the power cable 6. By setting the separation hole 4, the power cable 6 is placed in the separation hole to ensure that the power cable 6 will not be knotted when the wind turbine generator set yaws against the wind. By setting the slide groove 7 on the separation hole 4, an installation space is provided for the anti-wear slide bead 51, and the manufacturing is convenient. The separation hole 4 of the original anti-twist mechanism can be directly used without remaking it and adding high investment. By setting the structure of the anti-wear slide bead 51 and the spring assembly, the anti-wear slide bead 51 is relatively close to the slide groove 7. While being fixed, the torsion on the cable 6 can be released and decomposed as the cable 6 rotates relatively, and the sliding friction, cutting and surface contact between the cable 6 and the separation hole 4 are converted into rotational friction, without cutting and point contact, effectively avoiding the wear and cuts of the cable 6; through the structural design of the semi-circular cylindrical hole of the slide groove, the anti-wear sliding bead 51 can be installed without falling, and is limited by the opening smaller than the diameter of the anti-wear sliding bead 51, and cannot fall out to the left or right, thereby not affecting the normal use of the anti-wear sliding bead; through the setting of the cover plate 8, the anti-wear sliding bead 51 and the spring can be fixed, and it is convenient to install, repair and replace; the utility model is exquisitely designed and simple in structure, effectively solves the problem of serious wear of the power cable and the anti-torsion mechanism, effectively reduces the wear rate of the power cable, improves the safety of the power cable and the stability of the safe operation of the entire unit, and correspondingly reduces the operation and maintenance costs of the operation and maintenance personnel on the power cable, and has a wide range of applications, is convenient for installation, disassembly, repair and replacement, has a good online application effect, has a high practical application value, has a broad application prospect, and has good economic and social benefits.

Claims

1. A wind turbine power cable anti-twist mechanism anti-wear device, characterized by: The invention comprises a tower (1), wherein a torque-stopping mechanism is installed in the tower (1), wherein the torque-stopping mechanism is fixed in the tower (1) via a set of torque-stopping frames (2), wherein the torque-stopping mechanism comprises a torque-stopping plate (3) installed between the set of torque-stopping frames (2), wherein a plurality of partition holes (4) are arranged on the torque-stopping plate (3), wherein a plurality of anti-wear mechanisms (5) are arranged in the partition holes (4), wherein the plurality of anti-wear mechanisms (5) cover cables (6), wherein the anti-wear mechanisms (5) comprise anti-wear beads (51), wherein the anti-wear beads (51) are fixed in the partition holes (4) by being compressed by springs.

2. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 1, characterized in that: The tower (1) is a hollow cylinder.

3. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 2, characterized in that: One end of the anti-twist frame (2) is fixed to the inner wall of the tower (1), and comprises a group of vertical rods (21), a support rod (22) is fixedly mounted in the middle of the vertical rods (21), and a cross rod (23) is detachably mounted on the end thereof via bolts, and grooves are arranged on two opposite side surfaces of the vertical rods (21). The anti-twist plate (3) is inserted into the grooves on the group of vertical rods (21), and is fixed between the support rod (22) and the cross rod (23), and can swing up and down and slide forward and backward.

4. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 3, characterized in that: The anti-twist plate (3) is evenly arranged with a plurality of partition holes (4), and the partition holes (4) are configured as upper and lower through holes.

5. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 4, characterized in that: A plurality of slide grooves (7) are evenly arranged on the inner wall of the partition hole (4), an anti-wear mechanism (5) is installed inside the slide groove (7), and a cover plate (8) is detachably installed on the top of the slide groove (7), and the cover plate (8) fixes the anti-wear mechanism (5) in the slide groove (7).

6. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 5, characterized in that: The anti-wear mechanism (5) comprises an anti-wear sliding bead (51), which is clamped in a slide groove (7) on the inner wall of the partition hole (4). The anti-wear sliding bead (51) is pressed and fixed in the middle by an upper spring (52) and a lower spring (53) respectively, and is relatively fixed between the bottom and top of the slide groove (7).

7. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 6, characterized in that: The slide groove (7) is configured as a semi-cylindrical groove, the bottom of the hole is not through, and the chord length of the semi-circular hole opening is smaller than the diameter of the anti-wear slide bead (51).

8. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 7, characterized in that: The lower end of the lower spring (53) is fixed to the bottom of the slide groove (7), and the upper end is pressed against the anti-wear slide bead (51) but not fixed.

9. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 8, characterized in that: The upper end of the upper spring (52) is fixed to the bottom of the cover plate (8), and the lower end is pressed against the anti-wear sliding bead (51) but not fixed.

10. The anti-wear device for the anti-twist mechanism of the power cable of a wind turbine according to claim 9, characterized in that: The cover plate (8) is provided with a plurality of observation holes and bolt holes, the anti-twist plate (3) is provided with threaded holes, and the cover plate (8) and the anti-twist plate (3) are connected and fixed together by bolts.

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