Device for detecting abrasion loss of friction plate of yaw brake

Abstract

The invention discloses a yaw brake friction plate abrasion loss detection device, and relates to the technical field of friction plate abrasion loss detection.The yaw brake friction plate abrasion loss detection device comprises a brake shell, a hydraulic oil cavity is formed in the brake shell, an extrusion part is installed in the hydraulic oil cavity, a groove is formed in the brake shell, and a friction plate is installed in the groove; the extrusion part is connected with the friction plate, a rectangular groove, a transverse groove and a buffering groove are formed in the brake shell, the exhaust part is arranged in the transverse groove and installed on the annular surface of the extrusion part, the connecting part is installed in the rectangular groove and connected with the friction plate, and the buffering part is installed in the buffering groove. When the friction plate moves in the groove, the connecting structure is driven to move, after the friction plate is abraded, air enters the buffering groove through the gap between the blocking structure and the connecting plate to extrude the moving structure, then the laser range finder is used for detecting the moving distance of the moving structure, and the abrasion degree of the friction plate is judged; the friction plate detection effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of friction plate wear detection, and in particular to a yaw brake friction plate wear detection device. Background Art

[0002] The yaw brake used in wind turbines consists of a cylinder, a movable piston, a friction plate, an indicator rod, a spring, a seal, and some standard parts. Driven by hydraulic pressure, the movable piston moves, pushing out the friction plate and clamping the yaw brake disc. When the friction plate is worn to the point of needing replacement, it is impossible to determine the extent of wear. The wear of the friction plate can only be detected after the entire yaw brake is removed, posing a serious risk to the operation of the wind turbine.

[0003] The existing technology mainly uses direct measurement to determine the degree of friction plate damage by measuring the thickness of the friction plate after wear. Since the amount of single wear of the friction plate is small and the distance change is not obvious, it is impossible to accurately determine the degree of wear of the friction plate in real time. Summary of the Invention

[0004] The object of the present invention is to provide a device for detecting the wear of friction pads of a yaw brake, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a yaw brake friction pad wear detection device, comprising a brake housing, a hydraulic oil chamber is provided in the brake housing, an extrusion piece is installed in the hydraulic oil chamber, grooves are provided on two opposite side surfaces of the brake housing, a friction pad is installed in the groove, the extrusion piece is connected to the friction pad, a rectangular groove, a transverse groove and a cache groove are provided in the brake housing, the transverse groove passes through the rectangular groove and communicates with the cache groove, a small hole communicating with the transverse groove is provided on the side of the brake housing, a circular hole communicating with the rectangular groove is provided on the side of the brake housing, a first one-way valve is installed in the transverse groove, an exhaust piece is provided in the transverse groove, the exhaust piece is installed on the annular surface of the extrusion piece, a connecting piece is installed in the rectangular groove, the connecting piece is connected to the friction pad, a cache piece is installed in the cache groove, and the cache piece is in sliding contact with the transverse groove.

[0006] Furthermore, the extrusion member includes a movable plug, which is slidably connected in the hydraulic oil chamber, and an extrusion rod is installed on the side of the movable plug facing the friction plate. The exhaust member is installed on the annular surface of the extrusion rod, and the end of the extrusion rod away from the movable plug is connected to the friction plate. The hydraulic oil chamber is respectively provided with an oil inlet and an oil outlet on the upper and lower sides, and the oil inlet and the oil outlet are respectively connected to the hydraulic oil tank through a conduit and a hydraulic oil delivery pump.

[0007] Furthermore, the exhaust member includes a movable plate, which is installed on the annular surface of the extrusion rod. A sealing plate is installed on the side of the movable plate facing the transverse groove. A sealing groove is opened in the transverse groove, and the sealing plate is arranged in the sealing groove.

[0008] Furthermore, the connecting member includes a rectangular plate, which is arranged in a rectangular groove. A connecting plate is installed on the side of the friction plate facing the groove. A plurality of circular grooves are opened in the connecting plate. A blocking member is installed in the circular groove. The blocking member is connected to the rectangular plate at one end away from the connecting plate.

[0009] Furthermore, the blocking member includes a connecting rod, which is inserted into the circular groove, and a first elastic member is installed at one end of the connecting rod in the connecting plate, and the end of the first elastic member away from the connecting rod is installed in the connecting plate, and a blocking plate is installed at the end of the connecting rod away from the connecting plate, and the blocking plate is in contact with the connecting plate, and the end of the blocking plate away from the connecting rod is connected to the rectangular plate.

[0010] Furthermore, the cache member includes a moving block, which is arranged in the cache slot. A vertical slot is provided on the side of the moving block facing the transverse slot. A laser rangefinder is installed in the vertical slot. A moving member is installed in the vertical slot. An inclined plate is slidably connected in the cache slot, and the inclined plate is in contact with the moving block.

[0011] Furthermore, the movable member includes a movable plate, which is slidably connected in the vertical slot. A plurality of second elastic members are installed on the side of the movable plate facing the vertical slot, and one end of the second elastic member away from the movable plate is installed in the rectangular slot.

[0012] Furthermore, a second one-way valve is installed on a side of the cache groove away from the moving block, and the output end of the second one-way valve is connected to a plurality of exhaust pipes connected to the side of the groove.

[0013] Furthermore, a connecting hole communicating with the cache slot is opened in the groove, and a first supporting rod and a second supporting rod are respectively inserted at both ends of the connecting hole. The first supporting rod is connected to the friction plate, and the second supporting rod is connected to the moving block.

[0014] Furthermore, two first balancing holes communicating with the cache slot are provided on the side of the brake housing away from the brake pad, and the two first balancing holes are in contact with the moving block and the inclined plate respectively. The moving block is provided with a second balancing hole communicating with the moving slot.

[0015] The present invention provides a device for detecting the wear of a yaw brake friction plate, which has the following beneficial effects:

[0016] 1. The present invention sets a connecting structure consisting of a rectangular plate, a connecting plate, a connecting rod, a blocking plate and a first elastic member in a rectangular groove, and connects the connecting structure to the friction plate. When the friction plate moves in the groove, it drives the connecting structure to move. When the friction plate is worn, a gap is generated between the blocking structure consisting of the connecting rod, the blocking plate and the first elastic member and the connecting plate, and as the degree of wear of the friction plate increases, the gap between the blocking structure and the connecting plate increases. Then, an exhaust structure consisting of a movable plate and a sealing plate is installed on the annular surface of the extrusion rod. The exhaust structure is used to allow air to enter the cache groove through the gap between the blocking structure and the connecting plate, and squeezes the moving structure consisting of the movable plate and the second elastic member installed in the cache groove. Then, a laser rangefinder is used to detect the moving distance of the moving structure, and the gap between the blocking structure and the connecting plate (i.e., the degree of wear of the friction plate) is judged according to the amount of air entering, thereby improving the friction plate detection effect.

[0017] 2. The present invention opens a through hole in the groove that communicates with the cache groove and installs a second one-way valve in the through hole. When the inclined block is separated from the through hole, the air entering the cache groove is discharged into the groove through the second one-way valve and the exhaust pipe and contacts the friction plate, thereby cleaning the dust on the surface of the friction plate and improving the service life of the friction plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a device for detecting wear of friction plates of a yaw brake according to the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of a device for detecting wear of friction plates of a yaw brake according to the present invention;

[0020] Figure 3 This is a cross-sectional view of a device for detecting wear of friction plates of a yaw brake according to the present invention;

[0021] Figure 4 This is a schematic diagram of the assembly of a moving block and a moving plate of a yaw brake friction pad wear detection device according to the present invention;

[0022] Figure 5 This is a schematic diagram of the assembly of a yaw brake friction plate wear detection device according to the present invention when the connecting plate and the blocking plate are in contact;

[0023] Figure 6 This is a schematic assembly diagram of a yaw brake friction plate wear detection device according to the present invention when the connecting plate and the blocking plate are separated;

[0024] Figure 7 The figure is a schematic diagram of the assembly of an extrusion rod and a movable plate of a device for detecting the wear of friction plates of a yaw brake according to the present invention.

[0025] In the figure: 1. brake housing; 2. friction plate; 3. small hole; 4. oil inlet; 5. oil outlet; 6. circular hole; 7. first balancing hole; 8. exhaust pipe; 9. second one-way valve; 10. groove; 11. first elastic member; 12. connecting plate; 13. extrusion rod; 14. transverse groove; 15. sealing groove; 16. sealing plate; 17. movable plate; 18. movable plug; 19. hydraulic oil chamber; 20. connecting rod; 21. blocking plate; 22. rectangular plate; 23. connecting hole; 24. second holding rod; 25. second elastic member; 26. moving block; 27. moving plate; 28. cache slot; 29. ​​inclined plate; 30. first one-way valve; 31. first holding rod; 32. laser rangefinder; 33. second balancing hole; 34. rectangular groove. DETAILED DESCRIPTION

[0026] See also Figures 1 to 7 The present invention provides a technical solution: a device for detecting the wear of the friction pad of a yaw brake, comprising a brake housing 1, a hydraulic oil chamber 19 being provided in the brake housing 1, a movable plug 18 being slidably connected in the hydraulic oil chamber 19, an extrusion rod 13 being installed on the side of the movable plug 18 facing the friction pad 2, grooves 10 being provided on two opposite side surfaces of the brake housing 1, a friction pad 2 being installed in the groove 10, an end of the extrusion rod 13 away from the movable plug 18 being connected to the friction pad 2, the movable plug 18 dividing the hydraulic oil chamber 19 into two areas, an oil inlet 4 and an oil outlet 5 being respectively provided in the two areas, the oil inlet 4 and the oil outlet 5 being respectively connected to the hydraulic oil tank through a conduit and a hydraulic oil delivery pump, so that the hydraulic oil is introduced into and discharged from the hydraulic oil chamber 19, thereby realizing the movement of the movable plug 18 in the hydraulic oil chamber 19, thereby driving the friction pad 2 to move in the groove 10 and clamping the brake.

[0027] A rectangular groove 34, a transverse groove 14 and a cache groove 28 are provided in the brake housing 1. The transverse groove 14 passes through the rectangular groove 34 and communicates with the cache groove 28. A small hole 3 communicating with the transverse groove 14 is provided on the side of the brake housing 1. A circular hole 6 communicating with the rectangular groove 34 is provided on the side of the brake housing 1. A first one-way valve 30 is installed in the transverse groove 14. A movable plate 17 is provided in the transverse groove 14. The movable plate 17 is installed on the annular surface of the extrusion rod 13. A sealing plate 16 is installed on the side of the movable plate 17 facing the transverse groove 14. A sealing groove 15 is provided in the transverse groove 14. The sealing plate 16 is provided in the sealing groove 15. When the movable plate 17 moves to the side of the groove 10 together with the extrusion rod 13, it squeezes the air in the transverse groove 14.

[0028] A rectangular plate 22 is installed in the rectangular groove 34, and a connecting plate 12 is installed on the side of the friction plate 2 facing the groove. A plurality of circular grooves are opened in the connecting plate 12, and a connecting rod 20 is installed in the circular groove. A first elastic member 11 is installed at one end of the connecting rod 20 in the connecting plate 12, and the end of the first elastic member 11 away from the connecting rod 20 is installed in the connecting plate 12. The first elastic member 11 is a spring, and the first elastic member 11 is in a compressed state. A blocking plate 21 is installed at the end of the connecting rod 20 away from the connecting plate 12. The blocking plate 21 is in contact with the connecting plate 12, and the end of the blocking plate 21 away from the connecting rod 20 is connected to the rectangular plate 22. When the air in the transverse groove 14 is squeezed by the movable plate 17, if there is a gap between the blocking plate 21 and the connecting plate 12, the squeezed air will enter the cache slot 28 through the gap between the blocking plate 21 and the connecting plate 12.

[0029] A moving block 26 is slidably connected in the cache slot 28. A vertical slot is provided on the side of the moving block 26 facing the transverse slot 14. A laser rangefinder 32 is installed in the vertical slot. A moving plate 27 is installed in the vertical slot. A plurality of second elastic members 25 are installed on the side of the moving plate 27 facing the vertical slot. The end of the second elastic member 25 away from the moving plate 27 is installed in the rectangular slot 34. The second elastic member 25 is a spring. The second elastic member 25 is in a normal state. An inclined plate 29 is slidably connected in the cache slot 28. The inclined plate 29 is in contact with the moving block 26.

[0030] By setting a connecting structure consisting of a rectangular plate 22, a connecting plate 12, a connecting rod 20, a blocking plate 21 and a first elastic member 11 in the rectangular groove 34, and connecting the connecting structure to the friction plate 2, the friction plate 2 drives the connecting structure to move when it moves in the groove 10. When the friction plate 2 is worn, a gap is generated between the blocking structure consisting of the connecting rod 20, the blocking plate 21 and the first elastic member 11 and the connecting plate 12, and the gap between the blocking structure and the connecting plate 12 increases as the degree of wear of the friction plate 2 increases. Then, by installing an exhaust structure consisting of a movable plate 17 and a sealing plate 16 on the annular surface of the extrusion rod 13, the exhaust structure is used to allow air to enter the cache groove 28 through the gap between the blocking structure and the connecting plate 12, and to squeeze the moving structure consisting of the movable plate 27 and the second elastic member 25 installed in the cache groove 28. Then, the laser rangefinder 32 is used to detect the moving distance of the moving structure, and the gap between the blocking structure and the connecting plate 12 (that is, the degree of wear of the friction plate 2) is judged according to the amount of air entering, thereby improving the detection effect of the friction plate 2.

[0031] A second one-way valve 9 is installed on the side of the cache groove 28 away from the moving block 26. The output end of the second one-way valve 9 is connected to multiple exhaust pipes 8 connected to the side of the groove 10. By opening a through hole connected to the cache groove 28 in the groove 10 and installing the second one-way valve 9 in the through hole, when the inclined block is separated from the through hole, the air entering the cache groove 28 is discharged into the groove 10 through the second one-way valve 9 and contacts the friction plate 2, thereby cleaning the dust on the surface of the friction plate 2 and improving the service life of the friction plate 2.

[0032] A connecting hole 23 communicating with the cache slot 28 is provided in the groove 10, and a first supporting rod 31 and a second supporting rod 24 are respectively inserted at both ends of the connecting hole 23. The first supporting rod 31 is connected to the friction plate 2, and the second supporting rod 24 is connected to the moving block 26. When the friction plate 2 moves out of the groove 10, the first supporting rod 31 moves toward the groove 10 with the friction plate 2. Due to the air pressure balance in the connecting hole 23, when the first supporting rod 31 moves toward the groove 10, the second supporting rod 24 pulls the moving block 26. The block 26 moves toward the side away from the groove 10. When the friction plate 2 moves into the groove 10, the second supporting rod 24 drives the moving block 26 to move toward the side close to the groove 10. In order to ensure the air pressure balance in the buffer groove 28, two first balancing holes 7 communicating with the buffer groove 28 are opened on the side of the brake housing 1 away from the brake pad. The two first balancing holes 7 are in contact with the moving block 26 and the inclined plate 29 respectively, and a second balancing hole 33 communicating with the moving groove is opened on the moving block 26.

[0033] In summary, when using this device for detecting the wear of the yaw brake friction plate 2, hydraulic oil is first delivered to the hydraulic oil chamber 19 through the hydraulic oil delivery pump, and the movable plug 18 is moved to the side close to the groove 10. When the movable plug 18 moves, it drives the extrusion rod 13 to move, and squeezes the friction plate 2 out of the groove 10, and supports the yaw brake disc. When the extrusion rod 13 moves, it can drive the movable plate 17 to move, and the movable plate 17 moves to squeeze the air in the transverse groove 14.

[0034] When the friction plate 2 moves outward from the groove 10, it drives the connecting plate 12 to move toward the side of the groove 10. If there is a gap between the blocking plate 21 and the connecting plate 12, the squeezed air will enter the buffer groove 28 through the gap between the blocking plate 21 and the connecting plate 12. As the friction plate 2 is worn out, the friction plate 2 drives the connecting plate 12 to move a greater distance. At this time, the direct distance between the connecting plate 12 and the blocking plate 21 increases. At this time, the amount of gas squeezed into the buffer groove 28 by the movable plate 17 will increase. When the movable plate 17 moves, the movable plate 17 blocks the small hole 3. When the movable rod is reset, the small hole 3 re-connects the outside air with the transverse groove 14, allowing air to enter the transverse groove 14.

[0035] When the extrusion rod 13 appears and drives the friction plate 2 to move into the groove 10, the friction plate 2 drives the first supporting rod 31 to move to the side away from the groove 10. At the same time, the first supporting rod 31 squeezes the air in the connecting hole 23, causing the second supporting rod 24 to move out of the connecting hole 23, that is, driving the movable block 26 to the side close to the groove 10, and squeezing the inclined block during the movement, causing the inclined block to move to the side away from the horizontal groove 14. At the same time, when the movable plate 27 is not squeezed by the air in the buffer groove 28, the movable plate 27 moves outward from the vertical groove. When the movable plate 27 contacts the air entering the buffer groove 28, it will squeeze the movable plate 27, causing the movable plate 27 to move into the vertical groove. The more air enters the buffer groove 28, the greater the squeezing force on the movable plate 27, and the greater the distance it moves into the vertical groove. Therefore, the laser rangefinder 32 can judge the air content entering the buffer groove 28 according to the moving distance of the movable plate 27, and then judge the gap between the connecting plate 12 and the blocking plate 21, thereby detecting the wear of the friction plate 2.

[0036] When the moving block 26 fits into the side of the cache slot 28 close to the groove 10, the inclined block is separated from the second one-way valve 9. The air entering the cache slot 28 is discharged into the groove 10 through the second one-way valve 9 and the exhaust pipe 8 and contacts the friction plate 2, thereby cleaning the dust on the surface of the friction plate 2.

[0037] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A yaw brake friction plate wear detection device, comprising a brake housing (1), characterized in that: The brake housing (1) is provided with a hydraulic oil chamber (19), an extrusion piece is installed in the hydraulic oil chamber (19), grooves (10) are provided on two opposite sides of the brake housing (1), a friction plate (2) is installed in the groove (10), and the extrusion piece is connected to the friction plate (2), and the brake housing (1) is provided with a rectangular groove (34), a transverse groove (14) and a buffer groove (28), the transverse groove (14) passes through the rectangular groove (34) and communicates with the buffer groove (28), and the brake housing A small hole (3) communicating with the transverse groove (14) is provided on the side of the body (1), a circular hole (6) communicating with the rectangular groove (34) is provided on the side of the brake housing (1), a first one-way valve (30) is installed in the transverse groove (14), an exhaust component is provided in the transverse groove (14), the exhaust component is installed on the annular surface of the extrusion component, a connecting component is installed in the rectangular groove (34), the connecting component is connected to the friction plate (2), a cache component is installed in the cache groove (28), and the cache component is in sliding contact with the transverse groove (14).

2. The yaw brake friction plate wear detection device according to claim 1, characterized in that: The extrusion member includes a movable plug (18), the movable plug (18) is slidably connected in a hydraulic oil chamber (19), an extrusion rod (13) is installed on the side of the movable plug (18) facing the friction plate (2), the exhaust member is installed on the annular surface of the extrusion rod (13), and the end of the extrusion rod (13) away from the movable plug (18) is connected to the friction plate (2), and an oil inlet (4) and an oil outlet (5) are respectively provided on the upper and lower sides of the hydraulic oil chamber (19), and the oil inlet (4) and the oil outlet (5) are respectively connected to the hydraulic oil tank through a conduit and a hydraulic oil delivery pump.

3. The yaw brake friction plate wear detection device according to claim 2, characterized in that: The exhaust member includes a movable plate (17), which is installed on the annular surface of the extrusion rod (13); a sealing plate (16) is installed on the side of the movable plate (17) facing the transverse groove (14); a sealing groove (15) is provided in the transverse groove (14), and the sealing plate (16) is arranged in the sealing groove (15).

4. The device for detecting wear of friction pads of a yaw brake according to claim 1, characterized in that: The connecting member comprises a rectangular plate (22), the rectangular plate (22) being arranged in a rectangular groove (34), a connecting plate (12) being installed on the side of the friction plate (2) facing the groove, a plurality of circular grooves being provided in the connecting plate (12), a blocking member being installed in the circular groove, and an end of the blocking member away from the connecting plate (12) being connected to the rectangular plate (22).

5. The device for detecting wear of friction plate of yaw brake according to claim 4, characterized in that: The blocking member comprises a connecting rod (20), the connecting rod (20) being inserted into the circular groove, a first elastic member (11) being installed at one end of the connecting rod (20) in the connecting plate (12), an end of the first elastic member (11) away from the connecting rod (20) being installed in the connecting plate (12), a blocking plate (21) being installed at one end of the connecting rod (20) away from the connecting plate (12), the blocking plate (21) being in contact with the connecting plate (12), and an end of the blocking plate (21) away from the connecting rod (20) being connected to the rectangular plate (22).

6. The device for detecting wear of friction plate of yaw brake according to claim 1, characterized in that: The cache member comprises a moving block (26), the moving block (26) is arranged in a cache slot (28), a vertical slot is provided on one side of the moving block (26) facing the transverse slot (14), a laser rangefinder (32) is installed in the vertical slot, a moving member is installed in the vertical slot, an inclined plate (29) is slidably connected in the cache slot (28), and the inclined plate (29) is in contact with the moving block (26).

7. The device for detecting wear of friction pads of yaw brake according to claim 6, characterized in that: The movable member comprises a movable plate (27) which is slidably connected in the vertical slot. A plurality of second elastic members (25) are installed on one side of the movable plate (27) facing the vertical slot. One end of the second elastic member (25) away from the movable plate (27) is installed in the rectangular slot (34).

8. The device for detecting wear of friction plate of yaw brake according to claim 6, characterized in that: A second one-way valve (9) is installed on the side of the cache slot (28) away from the moving block (26), and the output end of the second one-way valve (9) is connected to a plurality of exhaust pipes (8) that are in communication with the side of the groove (10).

9. The device for detecting wear of friction plate of yaw brake according to claim 6, characterized in that: A connecting hole (23) communicating with the buffer slot (28) is provided in the groove (10), and a first supporting rod (31) and a second supporting rod (24) are respectively inserted into the two ends of the connecting hole (23), the first supporting rod (31) is connected to the friction plate (2), and the second supporting rod (24) is connected to the moving block (26).

10. The device for detecting wear of friction plate of yaw brake according to claim 6, characterized in that: Two first balancing holes (7) communicating with the buffer groove (28) are provided on a side of the brake housing (1) away from the brake pad. The two first balancing holes (7) are in contact with the moving block (26) and the inclined plate (29) respectively. The moving block (26) is provided with a second balancing hole (33) communicating with the moving groove.

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