Brake pad abrasion monitoring device, wind driven generator and rotor brake assembly of wind driven generator

Abstract

The utility model relates to a brake pad abrasion monitoring device, a wind driven generator and a rotor brake assembly of the wind driven generator, and the brake pad abrasion monitoring device is used for a brake pad of a rotor brake of the wind driven generator and comprises a connecting piece and a displacement sensor. The first end of the connecting piece is used for penetrating through the side wall of a shell of the rotor brake and being connected with a brake pad of the rotor brake, the distance from the connecting position of the connecting piece and the brake pad to the brake face of the brake pad is larger than the distance from the thickness bisector of the brake pad to the brake face of the brake pad, and the displacement sensor is used for being installed on the side wall of the shell. The displacement sensor is connected with the second end of the connecting piece so as to detect the moving distance of the connecting piece when the connecting piece moves along with the brake pad. The connecting piece can move in the direction close to the brake disc along with the brake pad, the displacement sensor can indirectly measure the moving distance of the brake pad by measuring the moving distance of the connecting piece, and the abrasion degree of the brake pad can be measured in real time by judging the moving distance of the brake pad.

Description

Technical Field

[0001] The present disclosure relates to the technical field of brake pad wear monitoring, and in particular to a brake pad wear monitoring device, a wind turbine generator and a rotor brake assembly thereof. Background Art

[0002] The rotor brake is an important safety component in a wind turbine. It is used to ensure that the wind turbine can stop rotating safely under certain circumstances to prevent equipment damage or personal injury.

[0003] During use, the brake pads of the rotor brake will rub against the brake disc and cause wear. In related technologies, operators need to climb the wind turbine regularly to inspect and replace the brake pads. On the one hand, the inspection efficiency of the brake pads is low; on the other hand, the operators cannot realize the real-time monitoring of the degree of wear of the brake pads. It is easy for the brake pads to be worn but the operators fail to discover it in time, affecting the safe operation of the wind turbine. Utility Model Content

[0004] The purpose of the present disclosure is to provide a brake pad wear monitoring device, a wind turbine generator and a rotor brake assembly thereof, so as to solve the problems existing in the related art.

[0005] According to a first aspect of the present disclosure, a brake pad wear monitoring device is provided for a brake pad of a rotor brake of a wind turbine, comprising:

[0006] a connecting member, wherein a first end of the connecting member is configured to pass through a side wall of a housing of the rotor brake and be connected to a brake pad of the rotor brake, and a distance from a connection position between the connecting member and the brake pad and a braking surface of the brake pad is greater than a distance from a thickness bisector of the brake pad to the braking surface of the brake pad;

[0007] A displacement sensor is used to be installed on the side wall of the housing, and the displacement sensor is connected to the second end of the connecting member to detect the moving distance of the connecting member when it moves with the brake pad.

[0008] Optionally, the brake pad wear monitoring device further includes a mounting bracket, the mounting bracket is mounted on the side wall of the housing, the displacement sensor is mounted on the mounting bracket, and the second end of the connecting member is movably passed through the mounting bracket and connected to the displacement sensor.

[0009] Optionally, a guide groove is provided on the mounting bracket, the guide groove extends along the moving direction of the brake pad, the second end of the connecting member is passed through the guide groove, and the inner wall of the guide groove is in sliding contact with the outer peripheral surface of the connecting member.

[0010] Optionally, along the moving direction of the brake pad, the length of the guide groove is smaller than the thickness of the brake pad.

[0011] Optionally, the connecting member is configured as a connecting rod, a first end of the connecting rod is provided with a threaded portion, and the threaded portion is threadedly connected to a threaded hole on the brake pad.

[0012] Optionally, the displacement sensor is constructed as a pull-rod type linear displacement sensor, and the pull rod of the pull-rod type linear displacement sensor is connected to the second end of the connecting member.

[0013] Optionally, the brake pad wear monitoring device further includes a controller and an oil pressure sensor, the oil pressure sensor is used to be arranged in the oil cylinder of the rotor brake, and the oil pressure sensor and the displacement sensor are both electrically connected to the controller.

[0014] According to a second aspect of the present disclosure, there is provided a rotor brake assembly for a wind turbine, comprising a rotor brake and the brake pad wear monitoring device as described above;

[0015] The rotor brake includes a housing and a brake pad arranged in the housing. A long hole is opened on the side wall of the housing, and the long hole extends along the moving direction of the brake pad. The displacement sensor of the brake pad wear monitoring device is installed on the side wall of the housing. The first end of the connecting piece of the brake pad wear monitoring device passes through the long hole and is connected to the brake pad.

[0016] Optionally, the rotor brake further includes a rotor brake disc, and the number of each of the brake pads, the connecting member, and the displacement sensor is two, the two brake pads are respectively arranged on both sides of the rotor brake disc, and each brake pad is correspondingly provided with one connecting member and one displacement sensor;

[0017] The two connecting members and the two displacement sensors are located on different sides of the two brake pads.

[0018] According to a third aspect of the present disclosure, a wind turbine is provided, comprising the rotor brake assembly as described above.

[0019] With the above-described technical solution, since the first end of the connector passes through the side wall of the housing capable of passing through the rotor brake and is connected to the brake pad, and the second end is connected to the displacement sensor, during the rotor braking of the wind turbine, the connector can follow the brake pad and move toward the brake disc. The displacement sensor can indirectly measure the distance the brake pad has moved by measuring the distance the connector has moved. By determining the distance the brake pad has moved, the degree of brake pad wear can be measured in real time. Compared to related technical solutions that require operators to regularly climb the wind turbine to inspect and replace the brake pads, the brake pad wear monitoring device provided in this application has higher detection efficiency and can measure the degree of brake pad wear in real time, effectively avoiding the situation where the brake pad is worn but the operator fails to discover it in time, thereby improving the operational safety of the wind turbine.

[0020] In addition, since the distance from the connection position between the connecting part and the brake pad to the braking surface of the brake pad is greater than the distance from the thickness bisector of the brake pad to the braking surface of the brake pad, in other words, the connecting part is arranged on the side of the brake pad away from the brake disc. In this way, during the use of the rotor brake, the connecting part itself will not interfere with the movement of the brake pad, and effectively avoids the situation where the connecting part is arranged on the side of the brake pad close to the brake disc, and the brake pad moves slightly toward the brake disc, the connecting part will interfere with the side wall of the rotor brake housing, and the brake pad will be unable to continue to move toward the direction close to the brake disc, resulting in the brake pad being unable to contact the brake disc and the rotor of the wind turbine being unable to brake.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of a brake pad wear monitoring device provided by an exemplary embodiment of the present disclosure installed on a rotor brake.

[0024] Figure 2 yes Figure 1 A magnified view of the middle panel.

[0025] Figure 3 1 is a side view schematic diagram of a mounting bracket provided in an exemplary embodiment of the present disclosure, wherein a displacement sensor and a connecting member are also shown.

[0026] Figure 4It is a structural schematic diagram of a rotor brake assembly provided by an exemplary embodiment of the present disclosure installed on a wind turbine.

[0027] Description of Reference Numerals

[0028] 100-wind turbine; 10-brake pad wear monitoring device; 11-connecting piece; 111-connecting rod; 112-threaded portion; 12-displacement sensor; 13-mounting bracket; 131-guide groove; 20-rotor brake; 21-brake pad; 211-braking surface; 22-housing; 221-long hole; 23-rotor brake disc; 24-oil cylinder; 30-rotor brake assembly. DETAILED DESCRIPTION

[0029] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0030] In the present disclosure, it should be understood that the directional words used, such as "upper" and "lower", are defined based on the drawing directions of the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, they cannot be understood as limitations on the present disclosure. The terms "inside" and "outside" refer to the inside and outside of the corresponding structural outline. In addition, it should be noted that the terms used, such as "first" and "second", are used to distinguish one element from another and do not have sequentiality or importance. In addition, in the description of the reference drawings, the same mark in different drawings represents the same element.

[0031] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; and they may refer to direct connections or indirect connections via an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0032] like Figures 1 to 4As shown, according to the first aspect of the present disclosure, a brake pad wear monitoring device 10 is provided, which is used for the brake pad 21 of the rotor brake 20 of the wind turbine 100. The brake pad wear monitoring device 10 includes a connector 11 and a displacement sensor 12. The first end of the connector 11 is used to pass through the side wall of the housing 22 of the rotor brake 20 and be connected to the brake pad 21 of the rotor brake 20, and the distance from the connection position of the connector 11 and the brake pad 21 to the braking surface 211 of the brake pad 21 is greater than the distance from the thickness bisector of the brake pad 21 to the braking surface 211 of the brake pad 21. The displacement sensor 12 is used to be installed on the side wall of the housing 22. The displacement sensor 12 is connected to the second end of the connector 11 so as to be able to detect the movement distance of the connector 11 when it moves with the brake pad 21.

[0033] Here, it should be noted that the braking surface 211 of the brake pad 21 refers to the surface of the brake pad 21 close to the brake disc. When the wind turbine 100 brakes, this surface can rub against the brake disc, thereby braking the wind turbine 100.

[0034] According to the above technical solution, since the first end of the connecting member 11 passes through the side wall of the housing 22 that can pass through the rotor brake 20 and is connected to the brake pad 21, and the second end is connected to the displacement sensor 12, during the rotor braking process of the wind turbine 100, the connecting member 11 can move with the brake pad 21 toward the brake disc. The displacement sensor 12 can indirectly measure the movement distance of the brake pad 21 by measuring the movement distance of the connecting member 11. By determining the movement distance of the brake pad 21, the wear degree of the brake pad 21 can be measured in real time. Compared with the technical solutions in the related art that require operators to regularly climb the wind turbine 100 to inspect and replace the brake pad 21, the brake pad wear monitoring device 10 provided by the present disclosure has higher detection efficiency and can measure the wear degree of the brake pad 21 in real time, effectively avoiding the situation where the brake pad 21 is worn but the operator fails to discover it in time, thereby improving the operating safety of the wind turbine 100.

[0035] In addition, since the distance from the connection position between the connecting member 11 and the brake pad 21 to the braking surface 211 of the brake pad 21 is greater than the distance from the thickness bisector of the brake pad 21 to the braking surface 211 of the brake pad 21, in other words, the connecting member 11 is arranged on the side of the brake pad 21 away from the brake disc. In this way, during the use of the rotor brake 20, the connecting member 11 itself will not interfere with the movement of the brake pad 21, effectively avoiding the situation where the connecting member 11 is arranged on the side of the brake pad 21 close to the brake disc, and the brake pad 21 moves slightly toward the brake disc, the connecting member 11 will interfere with the side wall of the housing 22 of the rotor brake 20, and the brake pad 21 cannot continue to move toward the direction close to the brake disc, resulting in the brake pad 21 being unable to contact the brake disc, and the rotor of the wind turbine 100 cannot be braked.

[0036] It should be noted that, in the brake pad wear detection device 10 of the present disclosure, the displacement sensor 12 can be directly mounted on the side wall of the housing 22 of the rotor brake 20, or the displacement sensor 12 can be indirectly mounted on the side wall of the housing 22 of the rotor brake 20, and the present disclosure does not limit this. As an embodiment of the present disclosure, Figures 1 to 3 As shown, the brake pad wear monitoring device 10 further includes a mounting bracket 13 mounted on a side wall of the housing 22. The displacement sensor 12 is mounted on the mounting bracket 13. The second end of the connector 11 movably passes through the mounting bracket 13 and is connected to the displacement sensor 12. In other words, the displacement sensor 12 is indirectly mounted on the side wall of the housing 22 of the rotor brake 20 via the mounting bracket 13. The mounting bracket 13 supports and secures the displacement sensor 12. The effective fixation of the displacement sensor 12 to the side wall of the housing 22 effectively prevents the displacement sensor 12 from shaking, which could lead to errors between the data measured by the displacement sensor 12 and the actual wear of the brake pad 21. This results in a high-precision brake pad wear monitoring device.

[0037] In order to further improve the monitoring accuracy of the brake pad wear detection device, optionally, as Figure 3As shown, the mounting bracket 13 is provided with a guide groove 131 extending in the direction of movement of the brake pad 21. The second end of the connector 11 is inserted into the guide groove 131, and the inner wall of the guide groove 131 is in sliding contact with the outer peripheral surface of the connector 11. Since the inner wall of the guide groove 131 is in sliding contact with the outer peripheral surface of the connector 11, when the connector 11 moves toward or away from the brake disc along with the brake pad 21, the guide groove 131 can limit the connector 11. The connector 11 can only move toward or away from the brake disc without shaking. The displacement sensor 12 can measure the actual movement distance of the brake pad 21, thereby measuring the degree of wear of the brake pad 21, effectively preventing the connector 11 from shaking during movement, which would cause the movement distance of the connector 11 measured by the displacement sensor 12 to differ from the actual movement distance of the brake pad 21.

[0038] To prevent wear of the brake pad 21 from causing damage to the brake disc and / or rotor brake 20, the length of the guide groove 131 along the movement direction of the brake pad 21 is optionally less than the thickness of the brake pad 21. Since the length of the guide groove 131 is less than the thickness of the brake pad 21, the guide groove 131 can also block the connection member 11 along the movement direction of the brake pad 21. If the brake pad 21 is severely worn, the guide groove 131 can block the connection member 11 during the process of the brake pad 21 moving toward the brake disc, preventing the brake pad 21 from continuing to move toward the brake disc. This effectively prevents the brake pad 21 from moving toward the brake disc even when it is severely worn, causing the brake disc to contact other components of the rotor brake 20 (such as the oil cylinder 24), thereby damaging the brake disc and / or rotor brake 20. This improves the service life of the brake disc and / or rotor brake 20.

[0039] As other embodiments of the present disclosure, a boss may be further provided on the mounting bracket 13, which can also limit the movement of the connecting member 11, thereby preventing other components on the rotor brake 20 from being easily damaged by friction with the brake disc after the brake pad 21 is worn.

[0040] The present disclosure does not limit the specific structure of the connector 11. As an embodiment of the present disclosure, Figure 2 As shown, the connecting member 11 can be constructed as a connecting rod 111. A threaded portion 112 is provided at a first end of the connecting rod 111, and the threaded portion 112 is threadedly connected to a threaded hole in the brake pad 21. The threaded connection between the connecting rod 111 and the brake pad 21 is well fixed, effectively preventing the connecting rod 111 from being separated from the brake pad 21 when the brake pad 21 moves, thereby preventing the displacement sensor 12 from being able to measure the actual travel distance of the brake pad 21.

[0041] As another embodiment of the present disclosure, the connecting member 11 may also be formed as a connecting pin. A positioning pin hole is provided on the brake pad 21 , and the connecting pin can be inserted into the connecting pin hole to be connected to the brake pad 21 .

[0042] It should be noted that the present disclosure does not limit the specific type of displacement sensor 12. As one embodiment of the present disclosure, the displacement sensor 12 is configured as a pull-rod linear displacement sensor 12, wherein the pull rod of the pull-rod linear displacement sensor 12 is connected to the second end of the connector 11. In this way, as the connector 11 moves with the brake pad 21, the connector 11 can pull the pull rod of the displacement sensor 12, thereby enabling the displacement sensor 12 to measure the travel distance of the brake pad 21 and, thereby, the wear of the brake pad 21.

[0043] As another embodiment of the present disclosure, the displacement sensor 12 can also be configured as a photoelectric sensor, with the photoelectric sensor's transmitter disposed on the sidewall of the housing 22 of the rotor brake 20, and the photoelectric sensor's receiver disposed at the second end of the connector 11. In this manner, as the connector 11 moves with the brake pad 21, the photoelectric sensor's transmitter emits light to the receiver. By measuring the time it takes for the light to be reflected back from the receiver, the travel distance of the brake pad 21 can be calculated, thereby measuring the wear of the brake pad 21.

[0044] To further improve the accuracy of monitoring brake pad 21 wear, the brake pad wear monitoring device 10 optionally further includes a controller and an oil pressure sensor (not shown). The oil pressure sensor is disposed in the oil cylinder 24 of the rotor brake 20, and both the oil pressure sensor and the displacement sensor 12 are electrically connected to the controller. The oil pressure sensor disposed in the oil cylinder 24 of the rotor brake 20 can measure changes in the oil pressure in the oil cylinder 24 of the rotor brake 20. On the one hand, the oil pressure sensor can indirectly measure the distance that the brake pad 21 is driven to move by the oil cylinder 24 (the longer the distance the brake pad 21 moves, the greater the oil pressure in the oil cylinder 24); on the other hand, the oil pressure sensor can also save the overall energy consumption of the brake pad wear monitoring device 10. When the oil pressure sensor detects a change in oil pressure (that is, when the brake pad 21 moves), the displacement sensor 12 will measure the displacement of the connecting part 11 at this time. When the brake pad 21 is not moving, the displacement sensor 12 can be in a dormant state under the control of the controller, effectively avoiding the situation where the displacement sensor 12 repeatedly measures and wastes energy due to the shaking of the wind turbine 100 itself.

[0045] It should be noted that the present disclosure does not limit the specific placement of the oil pressure sensor. As one embodiment, the oil pressure sensor can be disposed within the oil cylinder 24 to monitor changes in the oil pressure of the oil cylinder 24. As another embodiment, the oil pressure sensor can also be disposed outside the oil cylinder 24 and connected to a connector of the oil cylinder 24 to read the oil pressure of the oil cylinder 24.

[0046] According to a second aspect of the present disclosure, a rotor brake assembly 30 for a wind turbine 100 is provided, comprising a rotor brake 20 and the brake pad wear monitoring device 10 described above. The rotor brake 20 includes a housing 22 and a brake pad 21 disposed within the housing 22. A slot 221 is defined in a sidewall of the housing 22, extending in the direction of movement of the brake pad 21. A displacement sensor 12 of the brake pad wear monitoring device 10 is mounted on the sidewall of the housing 22. A first end of a connector 11 of the brake pad wear monitoring device 10 passes through the slot 221 and is connected to the brake pad 21. Because the housing 22 includes the slot 221 extending in the direction of movement of the brake pad 21, and the connector 11 passes through the slot 221 and is connected to the brake pad 21, the sidewall of the housing 22 of the rotor brake 20 does not interfere with the movement of the connector 11, allowing the connector 11 to move under the action of the brake pad 21.

[0047] The rotor brake assembly 30 has all the beneficial effects of the brake pad wear monitoring device 10 described above, which will not be described in detail here.

[0048] Alternatively, as Figure 4 As shown, the rotor brake 20 also includes a rotor brake disc 23, two brake pads 21, two connectors 11, and two displacement sensors 12. The two brake pads 21 are respectively arranged on either side of the rotor brake disc 23. Each brake pad 21 is correspondingly provided with a connector 11 and a displacement sensor 12, and the two connectors 11 and the two displacement sensors 12 are located on different sides of the two brake pads 21. Since each brake pad 21 is correspondingly provided with a connector 11 and a displacement sensor 12, the wear of both brake pads 21 can be monitored simultaneously through the corresponding connectors 11 and displacement sensors 12.

[0049] In addition, since the two connecting parts 11 and the two displacement sensors 12 are located on different sides of the two brake pads 21, the two connecting parts 11 and the displacement sensors 12 will not interfere with each other during use, effectively avoiding the two connecting parts 11 and the displacement sensors 12 from interfering with each other during use, which may cause the connecting parts 11 and / or the displacement sensors 12 to be easily damaged, or even cause the rotor brake 20 to fail to brake normally.

[0050] According to a third aspect of the present disclosure, a wind turbine 100 is provided, comprising the rotor brake assembly 30 as described above.

[0051] The wind turbine 100 has all the beneficial effects of the rotor brake assembly 30 described above, which will not be described in detail here.

[0052] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0054] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A brake pad wear monitoring device for a brake pad of a rotor brake of a wind turbine, characterized in that: include: a connecting member, wherein a first end of the connecting member is configured to pass through a side wall of a housing of the rotor brake and be connected to a brake pad of the rotor brake, and a distance from a connection position between the connecting member and the brake pad and a braking surface of the brake pad is greater than a distance from a thickness bisector of the brake pad to the braking surface of the brake pad; A displacement sensor is used to be installed on the side wall of the housing, and the displacement sensor is connected to the second end of the connecting member to detect the moving distance of the connecting member when it moves with the brake pad.

2. The brake pad wear monitoring device according to claim 1, characterized in that: The brake pad wear monitoring device further includes a mounting bracket mounted on a side wall of the housing, the displacement sensor mounted on the mounting bracket, and the second end of the connecting member movably passes through the mounting bracket and is connected to the displacement sensor.

3. The brake pad wear monitoring device according to claim 2, characterized in that: A guide groove is provided on the mounting bracket, and the guide groove extends along the moving direction of the brake pad. The second end of the connecting member is passed through the guide groove, and the inner wall of the guide groove is in sliding contact with the outer peripheral surface of the connecting member.

4. The brake pad wear monitoring device according to claim 3, characterized in that: Along the moving direction of the brake pad, the length of the guide groove is smaller than the thickness of the brake pad.

5. The brake pad wear monitoring device according to any one of claims 1 to 4, characterized in that: The connecting member is configured as a connecting rod, a first end of the connecting rod is provided with a threaded portion, and the threaded portion is threadedly connected to a threaded hole on the brake pad.

6. The brake pad wear monitoring device according to any one of claims 1 to 4, characterized in that: The displacement sensor is constructed as a pull-rod type linear displacement sensor, and the pull rod of the pull-rod type linear displacement sensor is connected to the second end of the connecting member.

7. The brake pad wear monitoring device according to any one of claims 1 to 4, characterized in that: The brake pad wear monitoring device further includes a controller and an oil pressure sensor. The oil pressure sensor is used to be arranged in the oil cylinder of the rotor brake, and the oil pressure sensor and the displacement sensor are both electrically connected to the controller.

8. A rotor brake assembly for a wind turbine, characterized in that: comprising a rotor brake and a brake pad wear monitoring device according to any one of claims 1 to 7; The rotor brake includes a housing and a brake pad arranged in the housing. A long hole is opened on the side wall of the housing, and the long hole extends along the moving direction of the brake pad. The displacement sensor of the brake pad wear monitoring device is installed on the side wall of the housing. The first end of the connecting piece of the brake pad wear monitoring device passes through the long hole and is connected to the brake pad.

9. The rotor brake assembly according to claim 8, characterized in that: The rotor brake further includes a rotor brake disc, and the number of the brake pads, the connecting member, and the displacement sensor are all two, the two brake pads are respectively arranged on both sides of the rotor brake disc, and each brake pad is correspondingly provided with one connecting member and one displacement sensor; The two connecting members and the two displacement sensors are located on different sides of the two brake pads.

10. A wind turbine, characterized in that: Comprising a rotor brake assembly according to any one of claims 8-9.

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