On-tower maintenance device for wind power yaw brake and use method of on-tower maintenance device

Abstract

The invention discloses an on-tower maintenance device for a wind power yaw brake and a using method. The on-tower maintenance device comprises a rack, and the yaw brake is arranged on one side of the bottom end of the rack. The device has the beneficial effects that the dangerous link of integrally hoisting a heavy brake assembly is completely avoided, the operation safety is greatly improved, the guide sleeve is in small clearance fit with a hole in the yaw brake, the possibility that equipment is damaged due to collision between the yaw brake and a screw rod in the ascending and descending processes can be prevented, the tedious step of integrally disassembling and assembling is omitted, and the production efficiency is improved. The maintenance efficiency is obviously improved; rotational motion is converted into linear motion through the thread pair and the thrust bearing, operation is labor-saving, operation can be achieved by a single person, and the device is particularly suitable for being used in the tower top environment with a narrow space; the yaw brake is simple in structure, is only composed of four core parts including the guide sleeve, the thrust bearing, the driving nut and the variable-diameter bolt, and can be suitable for hydraulic, hybrid and mechanical yaw brakes of different models and brands by adjusting the size of the variable-diameter bolt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine maintenance, in particular to a wind power yaw brake tower maintenance device and a use method thereof. BACKGROUND

[0002] With the continuous increase of the single machine capacity of wind turbine, the braking torque required to be provided by the yaw brake system also increases. In order to meet this requirement, the number of yaw brakes of a single unit is continuously increasing. The yaw brake mainly includes a hydraulic caliper disc brake, a hydraulic-mechanical hybrid brake and a mechanical brake. Such a layout results in that the installation spacing between adjacent yaw brakes is sharply compressed, and the space becomes very narrow.

[0003] At present, most of the brake connecting fasteners are removed, and only one fastener is kept in a loosened state; the brake caliper is rotated by means of the one fastener, so as to flow out the replacement space.

[0004] In the narrow space at the top of the tower, there is a lack of special tools to safely and efficiently separate the heavy brake caliper; most of the time, simple tools such as ring-connected hoists and pry bars are used, which not only have high labor intensity, consume time and effort, but also are easy to damage the brake body, the installation thread or the brake disc surface, and even may cause the safety risk of tool or component falling.

[0005] The two main replacement methods currently have the following significant disadvantages: 1. Small operation space, the internal seals and pistons generally need to be pressed or knocked into assembly due to the elastic deformation of the seals, and the lower caliper cannot be replaced due to the small space; 2. Difficult and dangerous operation, it is extremely inconvenient to carry heavy brakes at the top of the tower with limited space, which is easy to cause personal injury to the operator or to damage the brake and its surrounding precision components; 3. High labor intensity and low efficiency, a large amount of manpower and time is consumed for disassembling and assembling multiple heavy brakes, resulting in a long maintenance window period and a large loss of power generation. SUMMARY

[0006] The present application relates to the technical field of wind turbine maintenance, in particular to a wind power yaw brake tower maintenance device and a use method thereof.

[0007] The present application achieves the above-mentioned purpose through the following technical solutions: A wind turbine yaw brake tower maintenance device includes a frame, a yaw brake is installed on one side of the bottom end of the frame, a yaw bearing is installed on the bottom end of the frame on the side of the yaw brake, a yaw brake disc is installed on the lower side of the yaw bearing, a tower is installed at the bottom end of the yaw brake disc, the yaw brake includes an upper caliper installed on the upper side of the yaw brake disc, a lower caliper installed on the lower side of the upper caliper, a reducing bolt is installed between the upper caliper and the lower caliper, a guide sleeve is installed on the reducing bolt on the lower side of the lower caliper, a thrust bearing is installed on the lower side of the guide sleeve, a drive nut is installed at the bottom end of the thrust bearing, and a guide post is also installed on one side of the reducing bolt.

[0008] Furthermore, the upper caliper and the lower caliper are connected to the frame fasteners via a brake, and the yaw brake disc is located between the upper caliper and the lower caliper.

[0009] By adopting the above technical solution, the frame fasteners are mainly connecting bolts. The frame fasteners can achieve a reliable connection between the upper caliper and the lower caliper. The upper caliper and the lower caliper are mainly used to clamp and fix the yaw brake disc to achieve braking of the tower on the wind turbine.

[0010] Furthermore, the connection between the reducing bolt and the frame has a screw head one, and the connection between the reducing bolt and the drive nut has a screw head two.

[0011] By adopting the above technical solution, the first screw head is used to screw into the original connecting bolt hole on the frame, serving as the load-bearing foundation of the entire device; the second screw head is mainly used to install the drive nut.

[0012] Furthermore, the specifications of the first screw head are the same as those of the threaded hole in the frame, and its length is not less than that of the threaded hole in the frame. The specifications of the second screw head are smaller than those of the first screw head.

[0013] By adopting the above technical solution, the specifications of the screw head are the same as those of the threaded hole of the frame, which can ensure a reliable connection after the screw head is screwed into the frame.

[0014] Furthermore, the upper part of the guide sleeve is provided with an upper shaft circumferential surface, which is in close clearance fit with the bolt hole on the lower caliper, and the lower part of the guide sleeve is provided with a lower end hole circumferential surface, which is in interference fit with the thrust bearing.

[0015] By adopting the above technical solution, the upper shaft circumferential surface is mainly used to prevent damage and guide the brake body during its up-and-down movement, while the lower end hole circumferential surface is mainly used to achieve a reliable connection between the guide sleeve and the thrust bearing.

[0016] Furthermore, the upper side of the thrust bearing is an upper mating part that mates with the guide sleeve, and the lower side of the thrust bearing is a lower mating part that mates with the drive nut.

[0017] By adopting the above technical solution, the thrust bearing is installed on the smooth shank of the variable diameter bolt, mainly used to connect the drive nut and the guide sleeve.

[0018] Furthermore, the upper part of the drive nut is provided with an upper hole circumferential surface, which is interference-fitted with the thrust bearing, and the drive nut is provided with an internal thread, which is threadedly connected to the reducing bolt.

[0019] By adopting the above technical solution, rotating the drive nut can move the drive nut upward along the reducing bolt. While the drive nut is moving, it will move the lower caliper with the help of the thrust bearing and the guide sleeve, thereby realizing the reinstallation of the lower caliper after maintenance. When the drive nut is at the lower part of the reducing bolt, the lower caliper can be moved downward under its own weight with the help of external tools, so as to leave maintenance space between the upper caliper and the lower caliper.

[0020] Furthermore, consumable parts are also installed on the side of the lower caliper facing the yaw brake disc, including internal parts such as friction plates, seals, and pistons.

[0021] By adopting the above technical solution, the consumable parts are the components in the yaw brake that need to be easily replaced.

[0022] Furthermore, the guide post passes through the lower caliper and slides with it, the top of the guide post has a connecting thread, and the guide post is threadedly connected to the upper caliper.

[0023] By adopting the above technical solution, the guide post is mainly used to guide the movement of the lower caliper along the variable diameter bolt, so as to avoid the lower caliper from shifting or rotating during disassembly and assembly.

[0024] The beneficial effects of this invention are as follows: This invention uses a guide sleeve, thrust bearing, drive nut, and variable diameter bolt to inspect and maintain the yaw brake, completely avoiding the dangerous step of hoisting the entire heavy brake assembly. This greatly improves operational safety. The small clearance fit between the guide sleeve and the hole on the yaw brake prevents the yaw brake from colliding with the screw during the raising and lowering process, thus avoiding the tedious steps of overall disassembly and assembly and significantly improving maintenance efficiency. This invention converts rotary motion into linear motion through a threaded pair and a thrust bearing, making operation labor-saving and allowing for single-person operation. It is particularly suitable for use in confined environments such as tower tops. The present invention has a simple structure, consisting of only four core parts: guide sleeve, thrust bearing, drive nut and variable diameter bolt. By adjusting the size of the variable diameter bolt, it can be applied to hydraulic, hybrid and mechanical yaw brakes of different models and brands. Since the yaw brake is not completely disassembled during use, its original installation position remains basically unchanged, and no centering adjustment is required after resetting. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the installation structure of the yaw brake in the wind power yaw brake tower maintenance device described in this invention; Figure 2 This is a schematic diagram of the installation structure of a maintenance device for a wind turbine yaw brake tower as described in this invention; Figure 3 This is a schematic diagram of the internal structure of a wind turbine yaw brake tower maintenance device according to the present invention; Figure 4 This is a partial enlarged view of the variable diameter bolt, guide sleeve, lower caliper, and drive nut inside the maintenance device for a wind turbine yaw brake tower as described in this invention. Figure 5 This is a schematic diagram of the guide column in a wind turbine yaw brake tower maintenance device according to the present invention.

[0026] The annotations in the attached figures are explained as follows: 1. Frame; 2. Yaw bearing; 3. Yaw brake disc; 4. Tower; 5. Yaw brake; 501. Upper caliper; 502. Lower caliper; 5021. Caliper mounting hole; 5022. Consumable parts; 6. Brake and frame fasteners; 7. Reducing bolt; 701. Screw head one; 702. Screw head two; 8. Drive nut; 801. Upper hole circumferential surface; 802. Internal thread; 9. Thrust bearing; 901. Upper mating part; 902. Lower mating part; 10. Guide sleeve; 1001. Upper shaft circumferential surface; 1002. Lower end hole circumferential surface; 11. Guide post. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-5As shown, a wind turbine yaw brake tower maintenance device includes a frame 1. A yaw brake 5 is installed on one side of the bottom end of the frame 1. A yaw bearing 2 is installed on the bottom end of the frame 1 on the side of the yaw brake 5, ensuring reliable installation of the yaw brake 5. A yaw brake disc 3 is installed on the lower side of the yaw bearing 2. The yaw brake disc 3 is the main component for braking the tower 4. The tower 4 is located at the bottom end of the yaw brake disc 3. The yaw brake 5 includes an upper caliper 501 installed on the upper side of the yaw brake disc 3. A lower caliper 502 is installed on the lower side of the upper caliper 501. A reducing bolt 7 is installed between the upper caliper 501 and the lower caliper 502. A guide sleeve 10 is installed on the reducing bolt 7 on the lower side of the lower caliper 502. Equipped with a thrust bearing 9, and a drive nut 8 at the bottom of the thrust bearing 9, and a guide post 11 on one side of the reducing bolt 7, the yaw brake 5 is inspected and maintained using the guide sleeve 10, thrust bearing 9, drive nut 8, and reducing bolt 7. This completely avoids the dangerous step of hoisting the entire heavy brake assembly, greatly improving operational safety. The small clearance fit between the guide sleeve 10 and the hole on the yaw brake 5 prevents the yaw brake 5 from colliding with the screw during ascent and descent, thus eliminating the cumbersome steps of overall disassembly and assembly and significantly improving maintenance efficiency. Furthermore, it consists of only four core parts: guide sleeve 10, thrust bearing 9, drive nut 8, and reducing bolt 7. By adjusting the size of the reducing bolt 7, it can be used for hydraulic, hybrid, and mechanical yaw brakes 5 of different models and brands.

[0028] In this embodiment, the upper caliper 501 and the lower caliper 502 are connected to the frame fastener 6 via a brake. The yaw brake disc 3 is located between the upper caliper 501 and the lower caliper 502. The frame 1 fasteners are mainly connecting bolts. The frame 1 fasteners can reliably connect the upper caliper 501 and the lower caliper 502. The upper caliper 501 and the lower caliper 502 are mainly used to clamp and fix the yaw brake disc 3 to achieve braking of the tower 4 on the wind turbine.

[0029] In this embodiment, the variable diameter bolt 7 has a screw head 701 at the connection point with the frame 1, and a screw head 702 at the connection point with the drive nut 8. The screw head 701 is used to screw into the original connecting bolt hole on the frame 1, serving as the load-bearing foundation of the entire device; the screw head 702 is mainly used to install the drive nut 8.

[0030] In this embodiment, the specifications of the screw head 701 are the same as those of the threaded hole of the frame 1, and its length is not less than that of the threaded hole of the frame 1. The specifications of the screw head 702 are smaller than those of the screw head 701. By making the specifications of the screw head 701 the same as those of the threaded hole of the frame 1, a reliable connection can be ensured after the screw head 701 is screwed into the frame 1.

[0031] In this embodiment, the upper part of the guide sleeve 10 is provided with an upper shaft circumferential surface 1001, which is in close clearance fit with the bolt hole on the lower caliper 502. The lower part of the guide sleeve 10 is provided with a lower end hole circumferential surface 1002, which is in interference fit with the thrust bearing 9. The upper shaft circumferential surface 1001 is mainly used to prevent damage and guide the brake body during up and down movement. The lower end hole circumferential surface 1002 is mainly used to achieve a reliable connection between the guide sleeve 10 and the thrust bearing 9.

[0032] In this embodiment, the upper side of the thrust bearing 9 is an upper mating part 901 that mates with the guide sleeve 10, and the lower side of the thrust bearing 9 is a lower mating part 902 that mates with the drive nut 8. The thrust bearing 9 is installed on the smooth rod part of the variable diameter bolt 7 and is mainly used to connect the drive nut 8 and the guide sleeve 10.

[0033] In this embodiment, the upper part of the drive nut 8 is provided with an upper hole circumferential surface 801, which is interference-fitted with the thrust bearing 9. The drive nut 8 is provided with an inner hole thread 802, which is threadedly connected to the reducing bolt 7. Rotating the drive nut 8 can move the drive nut 8 upward along the reducing bolt 7. While the drive nut 8 is moving, it will move the lower caliper 502 with the help of the thrust bearing 9 and the guide sleeve 10, thereby realizing the reinstallation of the lower caliper 502 after maintenance. When the drive nut 8 is at the lower part of the reducing bolt 7, the lower caliper 502 can be moved downward under its own weight with the help of external tools, so that maintenance space is reserved between the upper caliper 501 and the lower caliper 502.

[0034] In this embodiment, a consumable part 5022 is also installed on the side of the lower caliper 502 facing the yaw brake disc 3. The consumable part 5022 includes internal parts such as friction plates, seals and pistons. The consumable part 5022 is a component in the yaw brake 5 that needs to be easily replaced.

[0035] In this embodiment, the guide post 11 passes through the lower caliper 502 and slides with the lower caliper 502. The top end of the guide post 11 has a connecting thread. The guide post 11 is threadedly connected to the upper caliper 501. The guide post 11 is mainly used to provide guidance for the lower caliper 502 to move along the reducing bolt 7, so as to avoid the lower caliper 502 from offsetting and rotating during disassembly and assembly.

[0036] A method for using a maintenance device on a wind turbine yaw brake tower: When performing maintenance on the wind turbine yaw brake 5 tower, first ensure that the yaw brake 5 is in a depressurized state or that the mechanical pre-tightening device is in a loosened state; then remove some of the connecting bolts that fix the yaw brake 5 to the frame 1; and pass the reducing bolt 7 through the upper caliper 501 and the lower caliper 502, and screw it into a connecting hole on the frame 1 where a bolt has been removed. The upper caliper 501 is located at the bottom of the yaw brake disc 3. The constraint will not slip. The guide post 11 is passed through the lower caliper 502 on the side opposite to the reducing bolt 7 and screwed into the upper caliper 501. Then, the upper circumferential surface 1001 of the guide sleeve 10 is inserted into the corresponding mounting hole of the yaw brake 5 and fitted onto the reducing bolt 7. Next, the thrust bearing 9 is installed, with the outer ring of the top race of the thrust bearing 9 pressed into the cylindrical surface of the lower end hole of the thrust bearing 9 in the guide sleeve 10. Finally, the drive nut 8 is screwed in, so that its top stop aligns with the... The lower mating part 902 of the thrust bearing 9 is interference-fitted; when the drive nut 8 is rotated using a wrench or other tools, since the drive nut 8 is fixed to the outer ring of the thrust bearing 9 through a stop, and the other outer ring of the thrust bearing 9 is limited by the guide sleeve 10, the axial force generated by rotating the drive nut 8 is transmitted to the yaw brake 5 through the thrust bearing 9 and the guide sleeve 10, thereby smoothly moving the lower caliper 502 away from the mounting surface of the frame 1, forming a maintenance operation space; in the formed space During this period, the consumable parts 5022 on the yaw brake 5, such as friction plates, seals, and pistons, are inspected, maintained, or replaced. Finally, the drive nut 8 is rotated in the reverse direction to allow the lower caliper 502 to descend and reset smoothly. Then, the original connecting bolts of the frame 1 are reinstalled and tightened. At the same time, the drive nut 8, the thrust bearing 9, the guide sleeve 10, the reducing bolt 7, and the guide column 11 are removed to complete the maintenance work. The original connecting bolts of the brake and the frame 1, as well as other oil pipes and accessories, are then installed.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A maintenance device for a wind turbine yaw brake tower, characterized in that: The device includes a frame (1), a yaw brake (5) is provided on one side of the bottom end of the frame (1), a yaw bearing (2) is provided on the bottom end of the frame (1) on the side of the yaw brake (5), a yaw brake disc (3) is installed on the lower side of the yaw bearing (2), a tower (4) is provided at the bottom end of the yaw brake disc (3), the yaw brake (5) includes an upper caliper (501) provided on the upper side of the yaw brake disc (3), a lower caliper (502) is provided on the lower side of the upper caliper (501), a reducing bolt (7) is installed between the upper caliper (501) and the lower caliper (502), a guide sleeve (10) is installed on the reducing bolt (7) on the lower side of the lower caliper (502), a thrust bearing (9) is installed on the lower side of the guide sleeve (10), a drive nut (8) is installed at the bottom end of the thrust bearing (9), and a guide post (11) is also installed on one side of the reducing bolt (7).

2. The wind turbine yaw brake tower maintenance device according to claim 1, characterized in that: The upper caliper (501) and the lower caliper (502) are connected to the frame fastener (6) via a brake, and the yaw brake disc (3) is located between the upper caliper (501) and the lower caliper (502).

3. A wind turbine yaw brake tower maintenance device according to claim 1, characterized in that: The variable diameter bolt (7) has a screw head (701) at the connection between it and the frame (1), and the variable diameter bolt (7) has a screw head (702) at the connection between it and the drive nut (8).

4. A wind turbine yaw brake tower maintenance device according to claim 3, characterized in that: The specifications of the first screw head (701) are the same as those of the threaded hole of the frame (1), and its length is not less than that of the threaded hole of the frame (1). The specifications of the second screw head (702) are smaller than those of the first screw head (701).

5. A wind turbine yaw brake tower maintenance device according to claim 1, characterized in that: The upper part of the guide sleeve (10) is provided with an upper shaft circumferential surface (1001), which is in close clearance fit with the bolt hole on the lower caliper (502). The lower part of the guide sleeve (10) is provided with a lower end hole circumferential surface (1002), which is in interference fit with the thrust bearing (9).

6. A maintenance device for a wind turbine yaw brake tower according to claim 1, characterized in that: The upper side of the thrust bearing (9) is an upper mating part (901) that mates with the guide sleeve (10), and the lower side of the thrust bearing (9) is a lower mating part (902) that mates with the drive nut (8).

7. A maintenance device for a wind turbine yaw brake tower according to claim 1, characterized in that: The drive nut (8) has an upper hole circumferential surface (801) on its upper part. The upper hole circumferential surface (801) is interference-fitted with the thrust bearing (9). The drive nut (8) has an inner hole thread (802) inside. The inner hole thread (802) is threadedly connected to the reducing bolt (7).

8. A maintenance device for a wind turbine yaw brake tower according to claim 1, characterized in that: The lower caliper (502) is also equipped with a consumable part (5022) on the side facing the yaw brake disc (3). The consumable part (5022) includes internal parts such as friction plates, seals and pistons.

9. A maintenance device for a wind turbine yaw brake tower according to claim 1, characterized in that: The guide post (11) passes through the lower caliper (502) and slides with the lower caliper (502). The top end of the guide post (11) has a connecting thread, and the guide post (11) is threadedly connected to the upper caliper (501).

10. A method of using a maintenance device for a wind turbine yaw brake tower, applied to the maintenance device for a wind turbine yaw brake tower as described in any one of claims 1 to 9, characterized in that: When maintaining the yaw brake (5) tower, first ensure that the yaw brake (5) is in a depressurized state or that the mechanical pre-tightening device is in a loose state; then remove some of the connecting bolts that fix the yaw brake (5) to the frame (1); and pass the reducing bolt (7) through the upper caliper (501) and the lower caliper (502), and screw it into a connecting hole on the frame (1) where a bolt has been removed. The upper caliper (501) will not slip due to the restriction of the yaw brake disc (3) at the bottom. Place the guide post (11) on... The lower caliper (502) is passed through the side opposite to the reducing bolt (7) and screwed into the upper caliper (501). Then, the upper circumferential surface (1001) of the guide sleeve (10) is inserted into the corresponding mounting hole of the yaw brake (5) and fitted onto the reducing bolt (7). Next, the thrust bearing (9) is installed, with the outer ring of the top race of the thrust bearing (9) pressed into the cylindrical surface of the lower end hole of the thrust bearing (9) in the guide sleeve (10). Finally, the drive nut (8) is screwed in, so that the stop at its top is aligned with the lower end of the thrust bearing (9). The mating part (902) is interference-fitted; using a wrench or other tools to rotate the drive nut (8), since the drive nut (8) is fixed to the outer ring of the thrust bearing (9) through the stop, and the other outer ring of the thrust bearing (9) is limited by the guide sleeve (10), the axial force generated by rotating the drive nut (8) is transmitted to the yaw brake (5) through the thrust bearing (9) and the guide sleeve (10), thereby smoothly moving the lower caliper (502) away from the mounting surface of the frame (1) to form a maintenance operation space; within the formed space, the caliper (502) is rotated to rotate the drive nut (8). The consumable parts (5022) on the yaw brake (5), such as friction plates, seals, pistons, etc., are inspected, maintained or replaced; finally, the drive nut (8) is rotated in the opposite direction to make the lower caliper (502) descend and reset smoothly, and then the original frame (1) connecting bolts are reinstalled and tightened; at the same time, the drive nut (8), the thrust bearing (9), the guide sleeve (10), the reducing bolt (7) and the guide column (11) are removed to complete the maintenance work; the original brake and frame (1) connecting bolts and other accessories such as oil pipes are installed.

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