Vibration detection equipment for tower drum of wind driven generator

Abstract

The utility model discloses a wind driven generator tower drum vibration detection device, which belongs to the field of wind driven generator vibration detection devices and comprises a plurality of sensors used for detecting a tower drum, the sensors are installed on telescopic arms and right face the inner wall of the tower drum, and the telescopic arms are annularly arrayed on an installation block. An annular end face gear is rotationally mounted on the mounting block, and the rotating axis of the end face gear is collinear with the central axis of the annular array of the telescopic arm; a cylindrical gear is coaxially fixed to the end, stretching into the mounting block, of each telescopic arm, and the cylindrical gears are meshed with the end face gears to drive all the telescopic arms to synchronously move along the axes of the telescopic arms. The vibration detection equipment for the tower drum of the wind driven generator can timely and accurately detect the vibration state of the tower drum of the generator, the collected data is comprehensive, and the repeatable monitoring performance is good.

Description

Technical Field

[0001] The utility model relates to the technical field of generator vibration detection equipment, in particular to a wind turbine generator tower vibration detection equipment. Background Art

[0002] Wind turbine tower vibration monitoring involves using a range of technologies and equipment to monitor tower vibration during operation to ensure safe operation and promptly detect potential faults. As a crucial component of a wind turbine, the tower not only bears the static load of the wind turbine but also handles dynamic loads under various wind conditions. Therefore, its vibration is crucial to the overall performance and safety of the wind turbine.

[0003] Tower vibration monitoring helps prevent resonance between the tower and the impeller or other components, thereby ensuring the safe operation of the wind turbine. By monitoring the tower's vibration levels and frequency components, potential faults can be promptly detected and addressed. Furthermore, vibration monitoring can help equipment maintenance personnel make accurate and timely fault diagnosis. By collecting and analyzing tower vibration data in real time, potential faults can be predicted and prevented, reducing equipment damage and downtime caused by vibration.

[0004] Numerous existing methods exist for inspecting generator towers, differing primarily by the type of sensor employed. However, sensor installation in nearly all cases relies on the sensor's inherent mounting structure, which then requires the design of a series of mounting supports. However, regardless of the sensor used, wind turbine towers face challenges in collecting comprehensive data and ensuring ease of installation. This is because towers differ from typical equipment in that they are not only larger in diameter but also taller, and their internal environment is often more challenging than in typical workshops or equipment rooms.

[0005] Therefore, in traditional vibration detection equipment, a small number of sensors are set up by selecting local points for monitoring. For example, only optical fiber sensors arranged at individual points are used for monitoring. On the one hand, it is not convenient to install these sensors. On the other hand, it is impossible to form a regular synchronous installation and monitoring of multiple sensors. There is no set position correlation between the detection points of the sensors, resulting in the final monitoring data being not comprehensive and accurate enough, and it cannot provide sufficient and reproducible monitoring data for accurately judging the vibration state of the generator tower. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present invention provides a wind turbine tower vibration detection device to solve the problems raised in the background technology and provide the most timely and comprehensive data support for accurately determining the vibration status of the generator tower.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wind turbine tower vibration detection device, comprising a plurality of sensors for detecting the tower, the sensors being mounted on telescopic arms and facing the inner wall of the tower, the telescopic arms being arranged in an annular array on a mounting block, an annular end face gear being rotatably mounted on the mounting block, the axis of rotation of the end face gear being colinear with the central axis of the annular array of telescopic arms; a cylindrical gear being coaxially fixed to one end of each telescopic arm extending into the mounting block, the cylindrical gear being engaged with the end face gear to drive all telescopic arms to move synchronously along their respective axes.

[0008] Furthermore, the mounting block is secured to a vertically fixed column. The column is coaxially arranged with the face gear and rotatably passes through a central through-hole in the face gear. The interior of the mounting block is a hollow structure, with the cylindrical gear located in the hollow. The face gear has a journal that is coaxially rotatably mounted within a mounting hole in the top surface of the mounting block. The tooth end of the face gear is also located in the hollow of the mounting block.

[0009] Furthermore, the telescopic arm includes a stud and a connecting rod, the cylindrical gear is fixed on the stud, the stud is threadedly installed in the mounting block, one end of the stud is coaxially connected to the connecting rod, the connecting rod is slidably engaged with a strip groove on the mounting block through a sliding key fixed on the side wall, and when the stud is screwed toward the outside of the mounting block, the connecting rod moves axially toward the outside of the mounting block, and a sensor is installed on the connecting rod.

[0010] Furthermore, the telescopic arm includes a seat sleeve and a connecting rod, a cylindrical gear is fixed to the end of the seat sleeve, and the seat sleeve is installed in the mounting block for rotation in situ. The center hole of the seat sleeve is a threaded hole, and a connecting rod is fitted with the inner thread of the threaded hole. A sliding key is fixed on the side wall outside the thread of the connecting rod, and the sliding key is slidably fitted with a strip groove on the mounting block. When the seat sleeve rotates, the connecting rod moves axially toward the outside of the mounting block through the transmission action of the threaded pair.

[0011] Furthermore, a curved elbow is fixed to the end of the connecting rod. The elbow is capable of moving toward the inner wall of the tower due to the axial movement of the connecting rod. A sensor is mounted on the elbow. The sensor is a fiber optic sensor. The elbow has a through hole, within which a threaded sleeve is embedded. The fiber optic sensor is mounted within the threaded sleeve. The sensing end of the fiber optic sensor is located within the elbow, facing the flared opening on the outer wall of the elbow.

[0012] Furthermore, an L-shaped bend rod is fixed to the connecting rod. The horizontal section of the bend rod is located above the elbow and its length can be adjusted to control the distance between the elbow and the inner wall of the tower. The connecting rod is a telescopic rod, and some sensors are installed on the bend rod.

[0013] The utility model provides a wind turbine tower vibration detection device. It has the following beneficial effects: a simple structure, easy installation and use. For tower vibration detection, based on the structural characteristics of the tower, multiple sensors are specifically arranged in a circular array, with relatively fixed detection position relationships between them. This facilitates comprehensive assessment of the actual status through the detection data of these sensors, and the data collection is comprehensive and sufficient, which can improve monitoring accuracy. Furthermore, when installed using optical fiber sensors, the vibration response of the tower under various external excitations can be monitored in real time. When the tower is subjected to wind loads, mechanical vibrations, etc., the optical fiber sensors can accurately measure parameters such as displacement, strain, and acceleration at different positions of the tower, reflecting the vibration characteristics of the tower.

[0014] In addition, the generator tower vibration detection points in this equipment can be comprehensively collected at different heights and different circumferential radii. The comprehensiveness of the data obtained can provide data support for the analysis of the most realistic vibration state. For multiple monitoring, especially review monitoring, it can quickly ensure that the monitoring points remain unchanged to a large extent, so as to provide sufficient operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of an installation structure of the utility model;

[0016] Figure 2 for Figure 1 The first implementation structure diagram at the installation block in;

[0017] Figure 3 for Figure 1 The second implementation structure diagram at the installation block in;

[0018] Figure 4 A partial axial cross-sectional view of the matching structure between the optical fiber sensor and the bent pipe.

[0019] In the figure: tower 1, column 2, mounting block 3, end gear 4, cylindrical gear 5, stud 6, connecting rod 7, sliding key 8, strip slide 9, elbow 10, bell mouth 1001, threaded sleeve 11, optical fiber sensor 12, turning rod 13, seat cover 14. DETAILED DESCRIPTION

[0020] This specification will clearly and completely express the technical solutions in the following examples based on the drawings of the embodiments of the present invention. The implementation methods described in this specification are only some of the embodiments of the present invention, not all of them. All other embodiments derived from these embodiments in this application by persons of ordinary skill in the art without any creative effort should fall within the scope of protection of the present invention.

[0021] like Figure 1 A wind turbine tower vibration detection device shown in the figure specifically includes several sensors for detecting the tower 1. The sensors are adaptively selected according to the use requirements. For example, an optical fiber sensor 12 is used to monitor the vibration state of the wind turbine and monitor the vibration response of the tower 1 under various external excitations in real time. When the tower 1 is subjected to wind loads, mechanical vibrations, etc., the optical fiber sensor 12 can accurately measure parameters such as displacement, strain, and acceleration of the inner wall of the tower 1 or the attached components fixed thereto. These parameters reflect the vibration characteristics of the tower 1. Specifically in this embodiment, the sensor can be installed on the telescopic arm and facing the inner wall of the tower 1 to detect the vibration state of the tower 1. The annular array of the telescopic arm in this embodiment is on a mounting block 3, as shown in FIG. Figure 2-Figure 3 As shown, a ring-shaped end gear 4 is rotatably mounted on the mounting block 3. During installation, the axis of rotation of the end gear 4 must be colinear with the central axis of the annular array of telescopic arms, and each end of the telescopic arm extending into the mounting block 3 is coaxially fixed with the same cylindrical gear 5. Each cylindrical gear 5 is engaged with the end gear 4, thereby driving all telescopic arms to move synchronously along their respective axes. This allows multiple sensors on a circle of the tower 1 to be located on the same circumference, thereby obtaining vibration state parameters at various locations on the same circumferential direction of the tower 1, and then judging the vibration direction, vibration amplitude and other states of the tower 1, as well as real-time assessment of the surrounding environment. In practice, the mounting block 3 can be fixed to a column 2, which can be fixed vertically. For example, the column 2 can be fixed to a floor slab at a corresponding height of the tower 1. Furthermore, it is preferable that the column 2 and the face gear 4 are coaxially arranged. This allows the mounting block 3 to be directly positioned in the center of the tower 1, eliminating the need for other auxiliary positioning methods during installation. The column 2 rotatably passes through the central through-hole of the face gear 4, allowing the face gear 4 to rotate around it. In practice, the central cable conduit within the tower 1 can be passed through the column 2, which does not affect the use of the existing centrally wired tower 1.

[0022] As one of the specific implementation structures, the interior of the mounting block 3 is a hollow structure, for example, it has an annular cavity, the cylindrical gear 5 is located in the hollow part, that is, in the above-mentioned cavity, and the end gear 4 has a shaft neck, which is coaxially rotatably mounted in the mounting hole on the top surface of the mounting block 3, and the tooth end of the end gear 4 is also located in the hollow part of the mounting block 3, so that the transmission part of the gear meshing is protectively arranged inside the mounting block 3.

[0023] As one example, Figure 2As shown, the telescopic arm includes a stud 6 and a connecting rod 7. The cylindrical gear 5 is fixed on the stud 6, and the stud 6 is threadedly mounted in the mounting block 3, that is, a threaded hole is provided on the inner wall of the mounting block 3 for the stud 6 to be screwed in. The screwing in and out of the stud 6 can drive the axial movement of a connecting rod 7 connected thereto, that is: one end of the stud 6 is coaxially connected to the connecting rod 7 for rotation. The connecting rod 7 slides with a strip groove 9 on the mounting block 3 through a sliding key 8 fixed on the side wall to guide the movement. When the end gear 4 rotates, the stud 6 tends to be screwed in toward the outside of the mounting block 3, that is, Figure 2 The stud 6 on the left side is screwed out to the left, which moves the connecting rod 7 axially toward the outside of the mounting block 3. Sensors are installed on the connecting rod 7, which causes all sensors to move synchronously toward the inner wall of the tower 1 and detect the vibration state of the inner wall of the tower 1.

[0024] As another example, Figure 3 As shown, the above-mentioned stud 6 in this embodiment is replaced by a seat sleeve 14, that is, the telescopic arm in this embodiment includes a seat sleeve 14 and a connecting rod 7. Similarly, the cylindrical gear 5 is fixed to the end of the seat sleeve 14. However, the seat sleeve 14 is installed in the mounting block 3 for rotation in situ. The center hole of the seat sleeve 14 is a threaded hole. The internal thread of this threaded hole is matched with a threaded section of a connecting rod 7. As in the above embodiment, a sliding key 8 is still fixed on the side wall outside the threaded section of the connecting rod 7. The sliding key 8 is slidably matched with a strip groove 9 on the mounting block 3. When in use, the end face gear 4 drives the seat sleeve 14 to rotate through the cylindrical gear 5, and can move the connecting rod 7 axially toward the outside of the mounting block 3 through the transmission action of the threaded pair, thereby achieving the purpose of synchronous adjustment and installation of the sensor.

[0025] When making specific Figure 1 and Figure 4 As for the specific installation of the sensor, an arc-shaped bend pipe 10 may be fixed at the end of the connecting rod 7. The bend pipe 10 can move toward the inner wall of the tower 1 under the axial movement of the connecting rod 7, and a sensor is provided on the bend pipe 10, for example, the sensor is provided in the center of the bend pipe 10. In more detail, this sensor is an optical fiber sensor 12. The above-mentioned bend pipe 10 has a through hole (the number is not shown in the figure), and a threaded sleeve 11 is embedded in the through hole. The optical fiber sensor 12 is installed in the threaded sleeve 11. The detection end of the optical fiber sensor 12 is located inside the bend pipe 10 and is facing the flare 1001 on the outer wall of the bend pipe 10. In this way, the bend pipe 10 can be used to stick to the inner wall of the tower 1 to ensure the monitoring distance between the optical fiber sensor 12 and the inner wall of the tower 1, and it is convenient to install and replace the optical fiber sensor 12. In order to control the installation position of the sensor, it is also possible to Figure 1An L-shaped bend rod 13 is also fixed to the connecting rod 7. The horizontal section of the bend rod 13 is located above the elbow 10, and the length of the horizontal section of the bend rod 13 is adjustable. Due to the tapered structure of the tower 1, the horizontal section of the bend rod 13 first contacts the inner wall of the tower 1, thereby controlling the distance between the elbow 10 and the inner wall of the tower 1. In this case, the elbow 10 is not positioned against the inner wall, but the bend rod 13 is used to determine the position of the sensor relative to the inner wall of the tower 1. If necessary, multiple sensors can be installed along the length of the elbow 10, thus forming a multi-circle sensor. The monitoring values ​​of the sensors at different positions relative to the inner wall of the tower 1 are comprehensively analyzed, resulting in more comprehensive and accurate monitoring data. In addition, the connecting rod 7 in this embodiment can also be a telescopic rod to adjust the sensor installation position. Moreover, some sensors are installed on the bend rod 13. This generates monitoring data from a series of sensors at different heights and at different circumferences at the same height, providing a more comprehensive basis for analyzing the vibration state of the generator tower 1.

[0026] It should be explained here that, in this specification, terms such as first and second are only used to distinguish one feature from another, and do not mean that there is a certain relationship or order between these technical features. The terms "include" and "comprise" refer to the inclusion of one or certain technical means or features, specifically meaning that there are other existing or non-existing technical features that have not been included. The discussion in the above embodiments is only a referential example for the present utility model, and is by no means the only restrictive constraint feature. Those skilled in the art should understand that, without departing from the technical content recorded in all claims of this application, some simple replacements and modifications can be made, thereby changing or becoming equivalent to other specific embodiments and application scenarios. However, no matter how the adaptive changes are made, these embodiments will inevitably fall within the scope of protection of the present utility model.

Claims

1. A wind turbine tower vibration detection device, comprising a plurality of sensors for detecting the tower (1), characterized in that: The sensor is mounted on the telescopic arm and faces the inner wall of the tower (1); the telescopic arm annular array is mounted on a mounting block (3); a ring-shaped end face gear (4) is rotatably mounted on the mounting block (3); the axis of rotation of the end face gear (4) is coaxial with the central axis of the telescopic arm annular array; a cylindrical gear (5) is coaxially fixed to one end of each telescopic arm extending into the mounting block (3); the cylindrical gear (5) is engaged with the end face gear (4) to drive all telescopic arms to move synchronously along their respective axes.

2. A wind turbine tower vibration detection device according to claim 1, characterized in that: The mounting block (3) is fixed on a column (2), and the column (2) is fixedly installed vertically.

3. A wind turbine tower vibration detection device according to claim 2, characterized in that: The upright column (2) is coaxially arranged with the end face gear (4) and passes through a through hole in the center of the end face gear (4) in a rotationally matched manner.

4. A wind turbine tower vibration detection device according to claim 3, characterized in that: The interior of the mounting block (3) is a hollow structure, the cylindrical gear (5) is located in the hollow part, the end face gear (4) has a shaft neck, and the shaft neck is coaxially rotatably mounted in the mounting hole on the top surface of the mounting block (3), and the gear tooth end of the end face gear (4) is also located in the hollow part of the mounting block (3).

5. The wind turbine tower vibration detection device according to claim 1, characterized in that: The telescopic arm includes a stud (6) and a connecting rod (7), the cylindrical gear (5) is fixed on the stud (6), the stud (6) is threadedly mounted in the mounting block (3), one end of the stud (6) is coaxially rotatably connected to the connecting rod (7), the connecting rod (7) is slidably engaged with a strip-shaped slot (9) on the mounting block (3) through a sliding key (8) fixed on the side wall, and when the stud (6) is screwed toward the outside of the mounting block (3), it moves axially toward the outside of the mounting block (3) with the connecting rod (7), and the sensor is mounted on the connecting rod (7).

6. The wind turbine tower vibration detection device according to claim 5, characterized in that: The telescopic arm includes a seat sleeve (14) and a connecting rod (7). The cylindrical gear (5) is fixed to the end of the seat sleeve (14). The seat sleeve (14) is installed in the mounting block (3) in a self-rotating manner. The center hole of the seat sleeve (14) is a threaded hole. A connecting rod (7) is threaded in the threaded hole. A sliding key (8) is fixed on the side wall outside the thread of the connecting rod (7). The sliding key (8) is slidably engaged with a strip-shaped sliding groove (9) on the mounting block (3). When the seat sleeve (14) rotates, it moves axially toward the outside of the mounting block (3) with the connecting rod (7) through the transmission action of the threaded pair.

7. A wind turbine tower vibration detection device according to claim 5 or 6, characterized in that: An arc-shaped curved pipe (10) is fixed to the end of the connecting rod (7). The curved pipe (10) can move toward the inner wall of the tower (1) under the axial movement of the connecting rod (7), and the sensor is provided on the curved pipe (10).

8. The wind turbine tower vibration detection device according to claim 7, characterized in that: The sensor is an optical fiber sensor (12), the curved pipe (10) has a through hole, a threaded sleeve (11) is embedded in the through hole, the optical fiber sensor (12) is installed in the threaded sleeve (11), and the detection end of the optical fiber sensor (12) is located inside the curved pipe (10) and directly facing the bell mouth (1001) on the outer wall of the curved pipe (10).

9. The wind turbine tower vibration detection device according to claim 7, characterized in that: An L-shaped turning rod (13) is also fixed on the connecting rod (7), and the horizontal rod section of the turning rod (13) is located above the bent pipe (10). The length of the horizontal rod section of the turning rod (13) can be adjusted to control the distance between the bent pipe (10) and the inner wall of the tower (1).

10. The wind turbine tower vibration detection device according to claim 9, characterized in that: The connecting rod (7) is a telescopic rod, and some of the sensors are installed on the turning rod (13); each curved pipe (10) is provided with a plurality of sensors with uniform spacing along its length direction.

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