Yaw on-line monitoring mechanism of wind turbine generator

Abstract

The invention discloses a wind turbine generator yaw online monitoring mechanism, and particularly relates to the technical field of wind turbine generator yaw, the wind turbine generator yaw online monitoring mechanism comprises a yaw bearing, the outer side of the yaw bearing is provided with a yaw gear ring, the outer side of the yaw gear ring is engaged with a yaw gear, and the top of the yaw gear is provided with a yaw motor; a machine base is installed between the yaw gear and the yaw motor, and a rotation monitoring mechanism is arranged on the top of the machine base. The rotation monitoring mechanism comprises a fixing box. According to the yaw system, the rotation monitoring mechanism and the angle adjusting mechanism are arranged, key parts of the yaw system are monitored in real time through the camera and the monitoring probe, multiple yaw motors can be comprehensively monitored, abnormal texture changes or bolt position changes on the surfaces of the yaw motors are monitored, and the yaw system is more accurate. Or the monitoring probe detects that the tooth surface at the meshing position of the yaw gear and the yaw gear ring is incomplete or meshing is abnormal, the maintenance efficiency is improved, and real-time monitoring and timely maintenance of the yaw system are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine yaw, and more specifically to an online monitoring mechanism for wind turbine yaw. Background Art

[0002] As the global demand for clean energy continues to grow, wind power generation has been widely developed and applied as a renewable and pollution-free energy technology. The yaw system of a wind turbine is an important component to ensure the normal operation of the wind turbine. It enables the impeller of the wind turbine to always align with the wind direction to maximize the efficiency of capturing wind energy.

[0003] After searching, the Chinese patent with announcement number CN208431106U discloses an online monitoring mechanism for the yaw system of a wind turbine. In view of the defects of the traditional online status monitoring and fault diagnosis system in terms of composition and use, such as incomplete data collection, insufficient monitoring data for the characteristics of multiple components of the yaw system, and non-advanced background data processing algorithms, which often lead to distorted results of the yaw system status monitoring and fault diagnosis, the sensor collects the yaw bearing speed, yaw motor current value and yaw caliper vibration signal value in the yaw system of the wind turbine in real time, which can comprehensively and accurately provide strong data support for the subsequent intelligent fault diagnosis and life assessment of the yaw system of the wind turbine, and provide a strong basis for more accurate intelligent fault diagnosis and life assessment of the yaw system.

[0004] However, when using sensors for monitoring, the sensors may be damaged, thus affecting the effect of monitoring the yaw system. At the same time, the monitoring data is not comprehensive enough if it only relies on sensors for monitoring. When there is a problem with the yaw system, it is necessary to go to the site to find out which specific part of the yaw system has a problem, which increases manpower and time costs and affects maintenance efficiency. Summary of the invention

[0005] In order to overcome the problems and defects in the prior art, the present invention provides an online yaw monitoring mechanism for a wind turbine generator set to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a wind turbine yaw online monitoring mechanism, comprising a yaw bearing, a yaw gear ring is installed on the outer side of the yaw bearing, a yaw gear is meshed on the outer side of the yaw gear ring, a yaw motor is installed on the top of the yaw gear, a base is installed between the yaw gear and the yaw motor, and a rotation monitoring mechanism is arranged on the top of the base;

[0007] The rotation monitoring mechanism comprises a fixed box, the fixed box is fixedly mounted on the top of the base, a first motor is fixedly mounted on the bottom of the inner wall of the fixed box, a rotating shaft is fixedly connected to the output end of the first motor, a fixed plate is fixedly connected to the top of the rotating shaft, two fixed side plates are fixedly connected to the top of the fixed plate, a camera is mounted between the two fixed side plates, and an angle adjustment mechanism is provided between the camera and the fixed side plate;

[0008] A second motor is fixedly mounted on the top of the base, and a monitoring probe is fixedly connected to an output end of the second motor.

[0009] Preferably, the angle adjustment mechanism comprises a rotating column, the rotating column is fixed on one side of the camera, the rotating column is rotatably connected to the fixed side plate, and a gear is fixedly mounted on the outer side of the rotating column.

[0010] Preferably, a movable tooth plate is meshed at the bottom of the gear, and a movable block is fixedly connected to the bottom of the movable tooth plate.

[0011] Preferably, one side of the moving block is fixedly connected to a telescopic cylinder, and the telescopic cylinder is fixedly installed on one side of the fixed side plate.

[0012] Preferably, the top of the rotating shaft passes through the fixed box and extends to the top of the fixed box, and the rotating shaft is rotatably connected to the fixed box.

[0013] Preferably, the yaw motor output end is rotatably connected to the machine base, the yaw motor output end passes through the machine base and extends to the bottom of the machine base, and the yaw gear is fixed on the outside of the yaw motor output end.

[0014] Preferably, a rotation speed sensor and a vibration sensor are fixedly mounted on the bottom of the yaw gear ring.

[0015] Technical effects and advantages of the present invention:

[0016] 1. By setting up a rotation monitoring mechanism and an angle adjustment mechanism, the key parts of the yaw system are monitored in real time through cameras and monitoring probes, and problems such as cracks in the yaw motor housing, loose connection bolts, and wear or damage to the yaw gear and yaw gear ring can be discovered in time. The camera can monitor abnormal texture changes on the surface of the yaw motor or changes in the position of the bolts, or the monitoring probe detects incomplete tooth surfaces or abnormal meshing at the meshing point of the yaw gear and yaw gear ring. The position and angle of the camera can be flexibly adjusted so that the camera can comprehensively monitor multiple yaw motors. Operation and maintenance personnel do not need to manually climb and check one by one, which greatly saves manpower and time costs and improves maintenance efficiency. Real-time monitoring and timely maintenance of the yaw system can ensure that the wind turbine always maintains a good yaw state, so that the impeller can accurately align with the wind direction, maximize the wind energy utilization factor, and thus improve the power generation efficiency of the wind turbine;

[0017] 2. Driven by the second motor, the monitoring probe can monitor the meshing point of the yaw gear and the yaw gear ring from multiple angles to ensure that there are no blind spots in monitoring. At the same time, it is easy to quickly determine the damaged part. The operation and maintenance personnel can quickly locate the fault location and carry out targeted repairs, reducing maintenance time and workload. When the yaw gear and yaw gear ring are poorly meshed, timely adjustment or replacement can be carried out to prevent further wear and damage and extend the service life of the entire yaw system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure between the yaw bearing and the yaw motor of the present invention.

[0020] Figure 3 It is a schematic diagram of the top structure of the fixing box of the present invention.

[0021] Figure 4 It is a bottom view structural schematic diagram of the present invention.

[0022] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the side of the present invention.

[0023] The accompanying drawings are marked as follows: 1. Yaw bearing; 2. Yaw gear ring; 3. Yaw gear; 4. Machine base; 5. Yaw motor; 6. Fixed box; 7. First motor; 8. Rotating shaft; 9. Fixed plate; 10. Fixed side plate; 11. Camera; 12. Rotating column; 13. Gear; 14. Moving gear plate; 15. Moving block; 16. Telescopic cylinder; 17. Speed ​​sensor; 18. Vibration sensor; 19. Second motor; 20. Monitoring probe. DETAILED DESCRIPTION

[0024] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] As attached Figure 1-5 The wind turbine yaw online monitoring mechanism shown comprises a yaw bearing 1, a yaw gear ring 2 is mounted on the outer side of the yaw bearing 1, a yaw gear 3 is meshed on the outer side of the yaw gear ring 2, a yaw motor 5 is mounted on the top of the yaw gear 3, a base 4 is mounted between the yaw gear 3 and the yaw motor 5, and a rotation monitoring mechanism is arranged on the top of the base 4;

[0026] The rotation monitoring mechanism includes a fixed box 6, which is fixedly mounted on the top of the base 4, a first motor 7 is fixedly mounted on the bottom of the inner wall of the fixed box 6, a rotating shaft 8 is fixedly connected to the output end of the first motor 7, a fixed plate 9 is fixedly connected to the top of the rotating shaft 8, two fixed side plates 10 are fixedly connected to the top of the fixed plate 9, a camera 11 is mounted between the two fixed side plates 10, and an angle adjustment mechanism is provided between the camera 11 and the fixed side plates 10;

[0027] A second motor 19 is fixedly mounted on the top of the base 4 , and a monitoring probe 20 is fixedly connected to the output end of the second motor 19 .

[0028] As attached Figure 1 , 3 As shown in Figure 5, the angle adjustment mechanism includes a rotating column 12, which is fixed on one side of the camera 11. The rotating column 12 is rotatably connected to the fixed side plate 10. A gear 13 is fixedly installed on the outer side of the rotating column 12. A movable tooth plate 14 is meshed at the bottom of the gear 13. A movable block 15 is fixedly connected to the bottom of the movable tooth plate 14. A telescopic cylinder 16 is fixedly connected to one side of the movable block 15. The telescopic cylinder 16 is fixedly installed on one side of the fixed side plate 10, which is convenient for adjusting the angle of the camera 11 and realizing more comprehensive monitoring of multiple yaw motors 5.

[0029] As attached Figure 3 , 5 As shown, the top of the rotating shaft 8 passes through the fixed box 6 and extends to the top of the fixed box 6. The rotating shaft 8 is rotatably connected to the fixed box 6, so that the rotating shaft 8 can rotate to drive the fixed plate 9 and the camera 11 to rotate.

[0030] As attached Figure 1 , 4 As shown, the output end of the yaw motor 5 is rotationally connected to the base 4, the output end of the yaw motor 5 passes through the base 4 and extends to the bottom of the base 4, and the yaw gear 3 is fixed on the outside of the output end of the yaw motor 5, so that the yaw motor 5 can drive the yaw gear 3 to rotate.

[0031] As attached Figure 4 As shown, a rotation speed sensor 17 and a vibration sensor 18 are fixedly mounted on the bottom of the yaw gear ring 2 to facilitate more comprehensive monitoring of the yaw system.

[0032] Working principle of the present invention: when the wind direction changes, the yaw motor 5 starts, drives the yaw gear 3 to rotate through the output end, the yaw gear 3 meshes with the yaw gear ring 2, thereby driving the yaw gear ring 2 to rotate, and the yaw gear ring 2 drives the yaw bearing 1 connected thereto to rotate, thereby causing the cabin of the entire wind turbine to rotate around the central axis of the tower, realizing the yaw action, and aligning the impeller with the wind direction to obtain wind energy to the greatest extent;

[0033] When the first motor 7 is working, its output end drives the rotating shaft 8 to rotate, and the fixed plate 9 on the top of the rotating shaft 8 rotates accordingly, thereby driving the fixed side plate 10 and the camera 11 installed between the two fixed side plates 10 to rotate, thereby realizing the horizontal rotation of the camera 11, so as to monitor the yaw motor 5 at different positions. The angle adjustment mechanism can adjust the shooting angle of the camera 11. When the telescopic cylinder 16 is working, it pushes the moving block 15 to move, and the moving block 15 drives the moving tooth plate 14 to move. The moving tooth plate 14 meshes with the gear 13, thereby driving the rotating column 12 to rotate. The rotating column 12 is fixed on one side of the camera 11, thereby realizing the angle adjustment of the camera 11, ensuring that the yaw motor 5 can be monitored at the best angle;

[0034] The camera 11 monitors the multiple yaw motors 5. By observing the appearance of the yaw motors 5, such as whether the motor housing has cracks, whether the connecting bolts are loose, etc., it can also monitor whether the connection between the yaw motor 5 and the base 4 is normal. Driven by the second motor 19, the monitoring probe 20 can adjust the monitoring angle. The monitoring probe 20 monitors the meshing of the yaw gear 3 and the yaw gear ring 2. It determines whether the yaw gear 3 and the yaw gear ring 2 are worn or damaged by the integrity of the tooth surface and the meshing condition between the teeth. For example, if the tooth surface is worn, cracked, or the meshing between the teeth is not tight, the monitoring probe 20 can detect it in time and feedback it to the monitoring system;

[0035] A speed sensor 17 and a vibration sensor 18 are installed at the bottom of the yaw gear ring 2. The speed sensor 17 can monitor the rotation speed of the yaw gear ring 2 in real time. When the speed is abnormal, it may indicate that there is a fault in the yaw system. The vibration sensor 18 monitors the vibration of the yaw system during operation. If the vibration amplitude exceeds the normal range, it may mean that there are problems with the yaw bearing 1 and the yaw gear 3.

[0036] Finally: The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A wind turbine yaw online monitoring mechanism, comprising a yaw bearing (1), characterized in that: A yaw gear ring (2) is installed on the outer side of the yaw bearing (1), a yaw gear (3) is meshed on the outer side of the yaw gear ring (2), a yaw motor (5) is installed on the top of the yaw gear (3), a base (4) is installed between the yaw gear (3) and the yaw motor (5), and a rotation monitoring mechanism is arranged on the top of the base (4); The rotation monitoring mechanism comprises a fixed box (6), the fixed box (6) is fixedly mounted on the top of the machine base (4), a first motor (7) is fixedly mounted on the bottom of the inner wall of the fixed box (6), an output end of the first motor (7) is fixedly connected to a rotating shaft (8), a fixed plate (9) is fixedly connected to the top of the rotating shaft (8), two fixed side plates (10) are fixedly connected to the top of the fixed plate (9), a camera (11) is mounted between the two fixed side plates (10), and an angle adjustment mechanism is provided between the camera (11) and the fixed side plate (10); A second motor (19) is fixedly mounted on the top of the machine base (4), and a monitoring probe (20) is fixedly connected to the output end of the second motor (19).

2. The wind turbine yaw online monitoring mechanism according to claim 1, characterized in that: The angle adjustment mechanism comprises a rotating column (12), the rotating column (12) is fixed on one side of the camera (11), the rotating column (12) is rotatably connected to the fixed side plate (10), and a gear (13) is fixedly mounted on the outer side of the rotating column (12).

3. The wind turbine yaw online monitoring mechanism according to claim 2 is characterized in that: The bottom of the gear (13) is meshed with a movable tooth plate (14), and the bottom of the movable tooth plate (14) is fixedly connected with a movable block (15).

4. The wind turbine yaw online monitoring mechanism according to claim 3 is characterized in that: One side of the moving block (15) is fixedly connected to a telescopic cylinder (16), and the telescopic cylinder (16) is fixedly mounted on one side of the fixed side plate (10).

5. The wind turbine yaw online monitoring mechanism according to claim 1, characterized in that: The top of the rotating shaft (8) passes through the fixed box (6) and extends to the top of the fixed box (6), and the rotating shaft (8) is rotatably connected to the fixed box (6).

6. The wind turbine yaw online monitoring mechanism according to claim 1, characterized in that: The output end of the yaw motor (5) is rotatably connected to the machine base (4); the output end of the yaw motor (5) passes through the machine base (4) and extends to the bottom of the machine base (4); and the yaw gear (3) is fixed on the outside of the output end of the yaw motor (5).

7. The wind turbine yaw online monitoring mechanism according to claim 1, characterized in that: A rotation speed sensor (17) and a vibration sensor (18) are fixedly mounted on the bottom of the yaw gear ring (2).

Images