Upper liner dismounting and mounting device and method suitable for yaw brake

Abstract

The invention discloses an upper liner dismounting and mounting device and method suitable for a yaw brake, and relates to the technical field of wind turbine generator dismounting and mounting equipment.The upper liner dismounting and mounting device comprises a supporting plate, a flange arranged on the tower top, a jack and a positioning base plate arranged on the top face of the supporting plate, the top end of the jack is provided with the positioning base plate, and the positioning base plate abuts against a lower clamp body; the jack support is arranged on the bottom face of the supporting plate, and the lower end of the jack support abuts against the inner wall of the tower drum. According to the upper liner dismounting and mounting device, the technical problems that when the upper liner is replaced manually, the labor intensity of workers is too large, the safety risk is large, a jacking mechanism cannot be stably supported, a cabin is stressed unevenly, and the inner wall of a tower drum is prone to being damaged are solved, the cabin is jacked up through the two jacks instead of manual work, and the working efficiency is improved. And the jack support is connected to the bottom face of the supporting plate, certain auxiliary supporting force is provided for the supporting plate, the stress uniformity of a cabin is improved, and the situation that the inner wall of the tower drum is damaged due to the fact that stress is too large is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine assembly and disassembly equipment, and in particular to an upper pad disassembly and assembly device and a disassembly and assembly method suitable for a yaw brake. Background Art

[0002] The yaw brake is an important part of the yaw system of the wind turbine. It provides braking torque to accurately align the wind turbine when the wind turbine is running. The yaw brake is located at the bottom of the nacelle, including upper and lower clamps, upper and lower pads, etc. When yawed to the wind, the upper pad will wear or break too quickly and fail prematurely. Therefore, the upper pad needs to be replaced. Because the upper pad is pressed under the nacelle weighing hundreds of tons and is located hundreds of meters above the ground, it is extremely difficult and dangerous to replace the upper pad.

[0003] The existing upper pad replacement methods mostly rely on simple manual replacement methods. Since the yaw brake is heavy, the labor intensity of the workers is too high and the safety risk is high. On the other hand, the existing upper pad disassembly and assembly device lifts the nacelle through a jacking mechanism, but the jacking mechanism cannot be stably supported, the nacelle is unevenly stressed, and the inner wall of the tower is easily damaged. Therefore, a disassembly and assembly device and a disassembly and assembly method for an upper pad of a yaw brake are proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an upper pad disassembly and assembly device and method suitable for a yaw brake, which solves the technical problems that when replacing the upper pad manually, the labor intensity of the staff is too high and the safety risk is high. In addition, the lifting mechanism in the existing upper pad disassembly and assembly device cannot be stably supported, the cabin is unevenly stressed, and the inner wall of the tower is easily damaged.

[0005] To achieve the above object, the present invention provides an upper pad disassembly and assembly device suitable for a yaw brake, comprising:

[0006] A support plate connected to the tower top flange on the yaw brake;

[0007] A jack, disposed on the top surface of the support plate, the jack being used to lift the bottom surface of the cabin away from the upper pad;

[0008] A positioning pad is provided at the top end of the jack, and the top surface of the positioning pad abuts against the lower clamp body;

[0009] The jack bracket is arranged on the bottom surface of the support plate, the lower end of the jack bracket is provided with an assembly block, the side surface of the assembly block is penetrated by a push rod, and the first end of the push rod supports the inner wall of the tower.

[0010] Preferably, the jack bracket comprises: two symmetrically arranged support arms, the support arms extend along the axial direction of the tower, and the two support arms are connected to a reinforcement plate.

[0011] Preferably, a plurality of first bolt holes are arranged in an array on the surface of the support plate, and first bolts pass through the first bolt holes to connect the tower top flange.

[0012] Preferably, a limiting groove is provided on the top surface of the positioning pad, a bolt head is provided on the bottom surface of the lower clamp body, and the limiting groove is clamped and connected to the bolt head.

[0013] Preferably, a plurality of positioning screws are provided on the top surface of the support plate, and the plurality of positioning screws are used to limit the position of the jack relative to the support plate.

[0014] Preferably, the first end of the top rod is connected to a positioning pad, and the positioning pad supports the inner wall of the tower.

[0015] Preferably, the side surface of the positioning pad is in an overall arc shape, and the side surface of the positioning pad fits the inner wall of the tower.

[0016] Preferably, a screw hole is arranged on the side surface of the positioning pad, a threaded hole is arranged on the end surface of the first end of the push rod, and a countersunk screw passes through the screw hole to connect with the threaded hole.

[0017] Correspondingly, the technical solution of the present invention further provides a method for disassembling and assembling an upper pad of a yaw brake, which is applied to any of the above-mentioned upper pad disassembling and assembling devices for a yaw brake, comprising:

[0018] S1: Install support plates on both sides of the upper clamp body connected to the upper gasket to be replaced, install the support plates on the tower top flange, install the jack on the top surface of the support plate, install the jack bracket on the bottom surface of the support plate, install a push rod on the lower end of the jack bracket, and one end of the push rod supports the inner wall of the tower;

[0019] S2: Remove one of the fastening bolts between the upper caliper body and the lower caliper body connected to the upper gasket to be replaced, screw the long screw into the bottom of the cabin and screw the first nut on the long screw, the top surface of the first nut on the long screw abuts against the bottom surface of the lower caliper body, remove the remaining fastening bolts in turn, screw out the first nut, and lower the lower caliper body to a certain height;

[0020] S3: Screw the short screw into the bottom of the nacelle and screw the second nut on the short screw. The top surface of the second nut abuts against the bottom surface of the upper caliper body. Remove the connecting bolts between the upper caliper body and the yaw gear ring, unscrew the second nut, and the upper caliper body drops to a certain height.

[0021] S4: Lift the nacelle with two jacks, pull out the upper gasket to be replaced and replace it with a new one.

[0022] Preferably, before removing one of the fastening bolts between the upper caliper body and the lower caliper body connected to the upper pad to be replaced, the step also includes: loosening all adjusting bolts on the yaw brake connected to the lower caliper body in the same group, so that the lower pad sinks and the lower pad no longer presses the yaw gear ring, and there is a gap between the yaw gear ring and the lower caliper body.

[0023] Compared with the above background technology, the present invention provides an upper pad disassembly and assembly device suitable for yaw brakes, which has the following beneficial effects: support plates are installed on both sides of the upper clamp body connected to the upper pad to be replaced, and a jack is set on the top surface of the support plate. The cabin is lifted up by two jacks instead of manual labor, which reduces the labor intensity of the staff and reduces the safety risks. On the other hand, a jack bracket is connected to the bottom surface of the support plate, and the lower end of the jack bracket supports the inner wall of the tower through a push rod, providing a certain auxiliary support force for the support plate, effectively preventing the support plate from being deformed due to excessive force, and improving the uniformity of the force on the cabin. At the same time, the jack bracket is used to increase the torque of the support plate on the inner wall of the tower, reduce the force on the inner wall of the tower, and effectively avoid damage to the inner wall of the tower due to excessive force. The disassembly and assembly method of the upper pad of the yaw brake used in the present invention also has the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] FIG1 is a three-dimensional structural diagram of an upper pad disassembly and assembly device provided in an embodiment of the present invention assembled on a yaw brake;

[0026] FIG2 is a plan view of an upper pad disassembly and assembly device provided in an embodiment of the present invention being assembled on a yaw brake;

[0027] FIG3 is a three-dimensional structural diagram of an upper gasket disassembly and assembly device provided in an embodiment of the present invention;

[0028] FIG4 is a schematic plan view of an upper gasket disassembly and assembly device provided in an embodiment of the present invention;

[0029] FIG. 5 is a schematic diagram of the assembly of the upper clamp body and the lower clamp body provided by an embodiment of the present invention.

[0030] Specifically, 1-support plate; 101-first bolt; 2-tower top flange; 3-jack; 4-jack bracket; 401-support arm; 402-reinforcement plate; 5-top rod; 6-positioning pad; 601-limiting groove; 7-positioning screw; 8-positioning pad; 9-screw hole; 10-countersunk screw; 11-long screw; 12-short screw; 13-cabin; 14-yaw gear ring; 15-upper clamp body; 16-lower clamp body; 17-adjusting bolt; 18-connecting bolt; 19-upper gasket; 20-lower gasket. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are applicable to the embodiments of the present invention, and belong to the scope of protection of the present invention.

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] As shown in Figures 1 and 3, in order to achieve the above-mentioned purpose, the present invention provides an upper pad 19 disassembly and assembly device suitable for a yaw brake, comprising: a support plate 1 arranged on a tower top flange 2, specifically, a plurality of first bolt holes 101 are arranged in an array on the surface of the support plate 1, and a second bolt hole is provided on the bottom surface of the tower top flange 2. The first bolt 101 passes through the first bolt hole 101 and connects the second bolt hole to fix the support plate 1 to the bottom surface of the tower top flange 2 on the yaw brake.

[0034] Among them, the top surface of the support plate 1 is provided with a jack 3. Specifically, a mounting hole is provided on the top surface of the support plate 1, and the jack 3 of the support plate 1 is connected by bolts passing through the mounting hole. A positioning pad 6 is provided at the top of the jack 3, and the positioning pad 6 abuts against the lower clamp body 16. The two jacks 3 are used to replace manual labor to lift the cabin 13, thereby reducing the labor intensity of the staff and reducing the safety risk. It should be noted that in the yaw brake, the top surface of the lower clamp body 16 is provided with an upper clamp body 15, and the upper clamp body 15 and the lower clamp body 16 cooperate to clamp the yaw gear ring 14.

[0035] A jack bracket 4 is provided on the bottom surface of the support plate 1. The support plate 1 is directly connected to the top end of the jack bracket 4 through a plurality of bolts. An assembly block is provided at the lower end of the jack bracket 4. A push rod 5 is provided through the side of the assembly block. One end of the push rod 5 close to the inner wall of the tower supports the inner wall of the tower. The lower end of the jack bracket 4 supports the inner wall of the tower through the push rod 5, providing a certain auxiliary support force for the support plate 1, effectively preventing the support plate 1 from being deformed due to excessive force, improving the uniformity of force on the cabin 13, and thus improving the safety of the cabin 13 when it is lifted.

[0036] When in use, the support plate 1 is installed on both sides of the upper clamp body 15 connected to the upper gasket 19 to be replaced, the first bolt 101 passes through the first bolt 101 hole to connect the second bolt hole, the support plate 1 is fixed to the bottom surface of the tower top flange 2, the jack 3 is installed on the top surface of the support plate 1, the jack bracket 4 is installed to the bottom surface of the support plate 1, the lower end of the jack bracket 4 is installed with a push rod 5, and one end of the push rod 5 supports the inner wall of the tower, and the two jacks 3 are started to lift the cabin 13 to complete the lifting operation of the cabin 13. The support plate 1 and the jack bracket 4 jointly apply a reaction force to the jack 3, effectively preventing the support plate 1 from being deformed due to excessive force, and improving the uniformity of the force on the cabin 13. In addition, the jack bracket 4 has a certain height, and the jack bracket 4 increases the moment of the support plate 1 on the inner wall of the tower, reduces the force on the inner wall of the tower, and thus avoids the inner wall of the tower from being damaged due to excessive force.

[0037] In one embodiment of the present invention, the jack bracket 4 includes: two symmetrically arranged support arms 401, the support arms 401 extend along the axial direction of the tower, that is, the height direction of the support arms 401 is kept as consistent as possible with the axial direction of the tower to ensure that the bolts at the top of the jack bracket 4 can be stably connected to the support plate 1. Specifically, a threaded line is set on the outer wall of the top rod 5, and a threaded hole is set on the side of the assembly block. The two top rods 5 are threadedly connected to the assembly block. By rotating the top rod 5 forward and reverse, the distance between the assembly block and the inner wall of the tower can be adjusted, and then the distance between the lower end of the jack bracket 4 and the inner wall of the tower can be adjusted until the positioning pad 8 stably supports the inner wall of the tower.

[0038] Preferably, multiple weight-reducing holes are provided on the two support arms 401, which can save manufacturing materials and make the overall device lightweight while ensuring that the support arms 401 provide sufficient support force for the jacks 3 on the support plate 1, thereby facilitating the installation of the overall device. In addition, the weight-reducing holes are generally circular in shape, which can minimize the impact of the weight-reducing holes on the bearing capacity of the support arms 401.

[0039] It should be noted that a reinforcing plate 402 is provided between the two support arms 401 . By connecting the two support arms 401 through the reinforcing plate 402 , the structural strength of the jack stand 4 can be further strengthened, the jack stand 4 can be prevented from being deformed due to excessive force, and the overall safety of the jack stand 4 can be improved.

[0040] In one embodiment of the present invention, a limiting groove 601 is provided on the top surface of the positioning pad 6, and a bolt head is provided on the bottom surface of the lower clamp body 16, wherein the bolt head is an inherent structure on the lower clamp body 16, and the upper clamp body 15 and the lower clamp body 16 are connected together by bolts, and the bolt head is the lower end of the bolt exposed at the bottom surface of the lower clamp body 16, and the limiting groove 601 is connected to the bolt head, and the limiting groove 601 is engaged with the bolt head, so that the positioning pad 6 can stably support the cabin 13, and the positioning pad 6 will not be separated from the lower clamp body 16 under the supporting action of the jack 3, so as to ensure that the cabin 13 is stably stressed during the lifting process, and improve the safety of the cabin 13 during the lifting process. On the other hand, the positioning pad 6 evenly distributes the force applied by the jack 3 to each bolt head to avoid damage to a single bolt head due to excessive force.

[0041] It should be noted that the positioning pad 6 can also be designed according to the shape of the lower caliper body 16, and a matching groove is set on the top surface of the positioning pad 6, so that the lower end of the lower caliper body 16 can be directly completely entered into the matching groove, so that the size of the bolt head and the distribution position on the bottom surface of the lower caliper body 16 are no longer considered, thereby expanding the application range of the positioning pad 6. Further, the bottom end surface of the positioning pad 6 is connected to the top of the jack 3 by ball joint. When the jack 3 supports the cabin 13 to rise a certain distance, since the bottom surface of the cabin 13 will form a certain angle with the top surface of the yaw gear ring 14, the jack 3 and the positioning pad 6 are connected by ball joint, so that the positioning pad 6 can adjust its own position and posture synchronously with the cabin 13, ensuring that the positioning pad 6 always stably supports the lower caliper body 16.

[0042] In addition, a plurality of positioning screws 7 are provided on the top surface of the support plate 1, and the position of the jack 3 relative to the support plate 1 is further limited by the plurality of positioning screws 7 to prevent the jack 3 from shifting relative to the top surface of the support plate 1 or even sliding off the support plate 1, thereby increasing the stability of the jack 3 when lifting the cabin 13.

[0043] In one embodiment of the present invention, one end of the top rod 5 close to the inner wall of the tower is connected to the positioning pad 8, and the positioning pad 8 supports the inner wall of the tower. The positioning pad 8 increases the force-bearing area between the two top rods 5 and the inner wall of the tower, so that when the jack 3 lifts the cabin 13, the force of the cabin 13 on the support plate 1 is distributed to the inner wall of the tower as evenly as possible through the jack bracket 4, thereby avoiding damage to the inner wall of the tower due to excessive local force.

[0044] It should be noted that the side surface of the positioning pad 8 is generally in an arc shape to ensure that the side surface of the positioning pad 8 fits the inner wall of the tower, and further ensures that the positioning pad 8 is stably matched with the inner wall of the tower.

[0045] As shown in Figure 4, a screw hole 9 is set on the side of the positioning pad 8, and a threaded hole is set on the end face of the first end of the top rod 5. The countersunk screw 10 passes through the screw hole 9 and connects to the threaded hole. According to the size and shape of the inner wall of the tower, the positioning pad 8 can be flexibly replaced so that the positioning pad 8 and the inner wall of the tower can be stably matched.

[0046] The disassembly and assembly method of the yaw brake upper pad 19 adopted in the present invention specifically comprises the following steps:

[0047] As shown in FIG2 , support plates 1 are installed on both sides of the upper clamp body 15 connected to the upper gasket 19 to be replaced, the support plate 1 is installed on the tower top flange 2, the jack 3 is installed on the top surface of the support plate 1, the jack bracket 4 is installed on the bottom surface of the support plate 1, and the lower end of the jack bracket 4 is installed with a push rod 5. The end of the push rod 5 close to the inner wall of the tower is connected to a positioning pad 8. The push rod 5 is rotated forward or reversely to adjust the distance between the lower end of the jack bracket 4 and the inner wall of the tower until the positioning pad 8 stably supports the inner wall of the tower; remove one of the fastening bolts between the upper clamp body 15 and the lower clamp body 16 connected to the upper gasket 19 to be replaced, screw the long screw 11 into the bottom of the cabin 13 and The first nut is screwed onto the long screw 11, and the top surface of the first nut on the long screw 11 abuts against the bottom surface of the lower clamp body 16. The remaining fastening bolts are removed in turn, the first nut is screwed out, and the lower clamp body is lowered to a certain height; the short screw 12 is screwed into the bottom of the cabin 13 and the second nut is screwed onto the short screw 12, and the top surface of the second nut abuts against the bottom surface of the upper clamp body 15. The connecting bolts 18 between the upper clamp body 15 and the yaw gear ring 14 are removed, the second nut is screwed out, and the upper clamp body is lowered to a certain height to provide operating space for pulling out and putting in the upper gasket 19; one side of the cabin 13 is lifted up by two jacks 3, the upper gasket 19 to be replaced is pulled out and replaced with a new upper gasket 19, and the replacement of the upper gasket 19 is completed.

[0048] As shown in Figure 5, it should be noted that before the step of removing one of the fastening bolts between the upper caliper body 15 and the lower caliper body 16 connected to the upper pad 19 that needs to be replaced, it also includes: loosening all the adjusting bolts 17 on the yaw brake that are connected to the lower caliper body 16 in the same group. Specifically, a plurality of adjusting bolts 17 are arranged through the bottom surface of the lower caliper body 16, and the top end of the adjusting bolt 17 is connected to the lower pad 20. The adjusting bolt 17 is threadedly connected to the lower caliper body 16. By screwing the adjusting bolt 17 in the forward direction, the adjusting bolt 17 can be moved upward relative to the lower caliper body 16, and then the lower pad 20 gradually supports the yaw gear ring 14, that is, the top surface of the lower caliper body 16 supports the yaw gear ring 14. When the adjusting bolt 17 is screwed in the reverse direction, the adjusting bolt 17 can be moved downward relative to the lower caliper body 16, and the lower pad 20 no longer presses the yaw gear ring 14. At this time, there is a gap between the yaw gear ring 14 and the lower caliper body.

[0049] In addition, the connecting bolt 18 is used to fix the position of the upper caliper body 15 on the yaw gear ring 14. When the lower caliper body 16 descends, the upper caliper body 15 will not descend with the lower caliper body 16 due to the fixing action of the connecting bolt 18. Since the upper caliper body 15 and the lower caliper body 16 are heavy, when the lower caliper body 16 is lowered by unscrewing the nut, the squeezing force of the lower caliper body 16 on the first nut can be reduced, that is, the lower caliper body 16 and the upper caliper body 15 are lowered to a certain height in turn, which helps to improve the safety of the upper caliper body 15 and the lower caliper body 16 when they are descended.

[0050] Further, it should be noted that the diameter of the long screw 11 is the same as the hole diameter of the threaded hole at the bottom of the cabin 13, that is, the long screw 11 can be threadedly connected with the threaded hole at the bottom of the cabin 13. The diameter of the short screw 12 is the same as the hole diameter of the threaded hole at the bottom of the cabin 13, that is, the short screw 12 can be threadedly connected with the threaded hole at the bottom of the cabin 13. At the same time, flat screws are provided at the exposed ends of the long screw 11 and the short screw 12 to facilitate the screwing in of the short screw 12.

[0051] In summary, the cabin 13 is lifted up by two jacks 3 instead of manual labor, and the long screw 11 and the short screw 12 are used to assist in the disassembly and assembly of the upper clamp body and the lower clamp body, thereby reducing the labor intensity of the staff and reducing the safety risks. At the same time, the jack bracket 4 is connected to the bottom surface of the support plate 1 to provide a certain auxiliary support force for the support plate 1, effectively preventing the support plate 1 from being deformed due to excessive force, improving the uniformity of the force on the cabin 13, and avoiding damage to the inner wall of the tower due to excessive force.

[0052] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0053] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An upper pad disassembly and assembly device suitable for a yaw brake, characterized in that: include: A support plate connected to the tower top flange on the yaw brake; A jack, disposed on the top surface of the support plate, the jack being used to lift the bottom surface of the cabin away from the upper pad; A positioning pad is provided at the top end of the jack, and the top surface of the positioning pad abuts against the lower clamp body; The jack bracket is arranged on the bottom surface of the support plate, the lower end of the jack bracket is provided with an assembly block, the side surface of the assembly block is penetrated by a push rod, and the first end of the push rod supports the inner wall of the tower.

2. The upper pad disassembly and assembly device for a yaw brake according to claim 1, characterized in that: The jack bracket comprises: two symmetrically arranged support arms, the support arms extend along the axial direction of the tower, and the two support arms are connected to a reinforcement plate.

3. The upper pad disassembly and assembly device for a yaw brake according to claim 2, characterized in that: A plurality of first bolt holes are arranged in an array on the surface of the support plate, and first bolts pass through the first bolt holes to connect the tower top flange.

4. The upper pad disassembly and assembly device for a yaw brake according to claim 1, characterized in that: A limiting groove is provided on the top surface of the positioning pad, and a bolt head is provided on the bottom surface of the lower clamp body. The limiting groove is clamped and connected to the bolt head.

5. The upper pad disassembly and assembly device for a yaw brake according to claim 1, characterized in that: The top surface of the support plate is provided with a plurality of positioning screws, and the plurality of positioning screws are used to limit the position of the jack relative to the support plate.

6. An upper pad disassembly and assembly device suitable for a yaw brake according to any one of claims 1 to 5, characterized in that: The first end of the top rod is connected to a positioning pad, and the positioning pad supports the inner wall of the tower.

7. The upper pad disassembly and assembly device for a yaw brake according to claim 6, characterized in that: The side surface of the positioning pad is generally in an arc shape, and the side surface of the positioning pad is in contact with the inner wall of the tower.

8. The upper pad disassembly and assembly device for a yaw brake according to claim 7, characterized in that: A screw hole is arranged on the side of the positioning pad, a threaded hole is arranged on the end surface of the first end of the push rod, and a countersunk screw passes through the screw hole to connect with the threaded hole.

9. A method for disassembling and assembling an upper pad for a yaw brake, applied to the upper pad disassembling and assembling device for a yaw brake according to any one of claims 1 to 8, characterized in that: The disassembly and assembly method comprises: S1: Install support plates on both sides of the upper clamp body connected to the upper gasket to be replaced, install the support plates on the tower top flange, install the jack on the top surface of the support plate, install the jack bracket on the bottom surface of the support plate, install a push rod on the lower end of the jack bracket, and one end of the push rod supports the inner wall of the tower; S2: Remove one of the fastening bolts between the upper caliper body and the lower caliper body connected to the upper gasket to be replaced, screw the long screw into the bottom of the cabin and screw the first nut on the long screw, the top surface of the first nut on the long screw abuts against the bottom surface of the lower caliper body, remove the remaining fastening bolts in turn, screw out the first nut, and lower the lower caliper body to a certain height; S3: Screw the short screw into the bottom of the nacelle and screw the second nut on the short screw. The top surface of the second nut abuts against the bottom surface of the upper caliper body. Remove the connecting bolts between the upper caliper body and the yaw gear ring, unscrew the second nut, and the upper caliper body drops to a certain height. S4: Lift the nacelle with two jacks, pull out the upper gasket to be replaced and replace it with a new one.

10. A method for disassembling and assembling an upper pad of a yaw brake according to claim 9, characterized in that: Before removing one of the fastening bolts between the upper caliper body and the lower caliper body connected to the upper pad to be replaced, the step also includes: loosening all the adjusting bolts on the yaw brake connected to the lower caliper body in the same group, so that the lower pad sinks and the lower pad no longer presses the yaw gear ring. At this time, there is a gap between the yaw gear ring and the lower caliper body.

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