Fan tower drum vibration monitoring device

Abstract

The utility model belongs to the field of offshore wind power, and discloses a fan tower drum vibration monitoring device which is cooperatively installed at the top in a drum of a fan tower drum and comprises a damper, a plurality of sensing monitoring assemblies and a connecting supporting assembly, the damper comprises a damper main body and a plurality of groups of elastic pieces annularly distributed around the damper main body, and the elastic pieces are connected with the damper main body. The number of the sensing monitoring assemblies is the same as that of the elastic pieces, the sensing monitoring assemblies and the elastic pieces are in one-to-one correspondence, the sensing monitoring assemblies monitor the stress conditions of the corresponding elastic pieces, and the damper is connected and supported in a fan tower barrel through the connecting and supporting assemblies. According to the utility model, vibration monitoring and real-time vibration control are organically combined, so that not only can the accuracy and timeliness of vibration monitoring be improved, but also the impact and damage of environmental factors to the wind power tower can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of offshore wind power, in particular to a wind turbine tower vibration monitoring device. Background Art

[0002] In recent years, offshore wind power has gradually become an important form of green energy production. However, offshore wind turbine towers face many challenges in practical operation, with vibration being a particularly prominent issue. Currently, the main existing technology products on the market include basic vibration monitoring equipment and standalone damper systems, which are used to monitor and mitigate structural vibrations caused by wind loads and ocean waves on wind turbine towers.

[0003] Existing vibration monitoring equipment primarily uses hardware such as strain gauges, accelerometers, or displacement sensors to monitor tower vibrations. Data acquisition systems transmit the collected data to a control center for analysis. While these vibration monitoring devices can identify tower vibrations to a certain extent, they cannot control and mitigate vibrations in real time, effectively preventing damage to the tower structure caused by prolonged vibrations.

[0004] Furthermore, existing damper systems are typically installed on top of buildings, controlling building vibrations by adjusting the force between the mass and springs within the system. However, these standalone damper systems are rarely used in offshore wind turbine towers, and their bulk and complex installation make them unsuitable for direct vibration control of wind turbine towers.

[0005] To address this issue, this application proposes a wind turbine tower vibration monitoring device that organically combines vibration monitoring with real-time vibration control. This not only improves the accuracy and timeliness of vibration monitoring, but also effectively mitigates the impact and damage to wind turbine towers caused by environmental factors. This technical solution can extend the service life of offshore wind turbine towers and improve the operational stability and safety of wind farms. Utility Model Content

[0006] The purpose of the utility model is to provide a wind turbine tower vibration monitoring device to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A wind turbine tower vibration monitoring device is installed on the top of the wind turbine tower, comprising:

[0009] A damper, comprising a damper body and a plurality of elastic members arranged around the damper body;

[0010] A plurality of sensor monitoring components, the number of the sensor monitoring components being the same as the number of the elastic members, the two corresponding one to one, the sensor monitoring components monitoring the stress conditions of the corresponding elastic members; and

[0011] A connecting support assembly is used to connect and support the damper in the wind turbine tower.

[0012] Furthermore, it also includes a tower inner ring sleeve, which is installed in conjunction with the top of the wind turbine tower and is sleeved on the outside of the damper. Several of the sensor monitoring components are distributed on the tower inner ring sleeve and connected to corresponding elastic parts.

[0013] Furthermore, several groups of the elastic members are evenly distributed around the damper body, and several sensor monitoring components are evenly distributed on the inner ring sleeve of the tower.

[0014] Furthermore, the inner wall of the inner ring sleeve of the tower is surrounded by a plurality of holes, and the plurality of sensing and monitoring components are arranged in the holes in a one-to-one correspondence.

[0015] Furthermore, there are a plurality of connecting support assemblies, which are distributed around the damper body. One end of the connecting support assembly is connected to the inner ring sleeve of the tower, and the other end is connected to the damper body.

[0016] Furthermore, the connection support assembly includes a first mounting seat, a second mounting seat and a suspension rope, the first mounting seat is arranged on the inner ring sleeve of the tower, the second mounting seat is arranged on the damper body, and the suspension rope is connected between the first mounting seat and the second mounting seat.

[0017] Furthermore, a gap is formed between the damper body and the inner sleeve of the tower for the cable to pass through.

[0018] Furthermore, the sensor monitoring component includes two left and right pressure sensors arranged side by side, and both pressure sensors are connected to corresponding elastic members.

[0019] Furthermore, the elastic member is a telescopic spring, and a plurality of spring installation shafts for installing the telescopic springs are arranged around the damper body.

[0020] Furthermore, a rope ladder reserved hole is provided on the damper body, which passes through the damper body from top to bottom.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1) Reduce tower vibration: Installing a damper on the top of the tower can effectively reduce tower vibration caused by external factors such as wind, electricity, and waves, thereby improving the stability and service life of the tower;

[0023] 2) Real-time vibration monitoring: The built-in vibration monitoring function can detect the vibration frequency and amplitude of the tower in a timely and accurate manner, facilitating the monitoring and analysis of the dynamic behavior of the tower;

[0024] 3) Increase system safety: Through real-time monitoring and vibration reduction functions, it can effectively prevent structural fatigue and damage caused by vibration, and improve the overall safety of the wind power system;

[0025] 4) Improve maintenance efficiency: Real-time and accurate vibration data helps to detect potential problems in a timely manner, reduce unexpected downtime, and improve maintenance and operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the longitudinal cross-section structure of the utility model.

[0027] Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the utility model.

[0028] In the figure: wind turbine tower 1, tower inner ring sleeve 2, hole 200, damper body 3, spring mounting shaft 4, elastic member 5, first mounting seat 6, hanging rope 7, pressure sensor 8, second mounting seat 9, rope ladder reserved hole 10. DETAILED DESCRIPTION

[0029] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1 and Figure 2 A wind turbine tower vibration monitoring device is installed at the top of the wind turbine tower 1, including a damper, several sensor monitoring components and a connecting support component. The damper includes a damper body 3 and several groups of elastic members 5 evenly distributed around the damper body 3. The number of sensor monitoring components is the same as the number of groups of elastic members 5, and the two correspond one to one in quantity and installation position. The sensor monitoring component monitors the stress condition of the corresponding elastic member 5, and the connecting support component connects and supports the damper inside the wind turbine tower 1.

[0031] Continue reading Figure 1 and Figure 2In one embodiment of the present invention, the wind turbine tower vibration monitoring and vibration reduction device also includes a tower inner ring sleeve 2, which is installed in cooperation with the top of the wind turbine tower 1 and is sleeved on the outside of the damper. A number of sensor monitoring components are distributed on the tower inner ring sleeve 2 and are connected to the corresponding elastic parts 5.

[0032] Among them, the tower inner ring sleeve 2 is located at the upper end of the wind turbine tower 1 close to the wind turbine gearbox housing. Since the vibration is more significant at the higher the wind turbine is, the damper should be placed as high as possible.

[0033] Continue reading Figure 1 and Figure 2 In one embodiment of the present invention, a plurality of holes 200 are arranged around the inner wall of the inner ring sleeve 2 of the tower, and a plurality of sensor monitoring components are arranged in the holes 200 one by one. The outer end of the elastic member 5 extends into the corresponding hole 200 and abuts against the sensor monitoring component.

[0034] Continue to refer to the figure Figure 2 In one embodiment of the present invention, the sensing monitoring component includes two left and right pressure sensors 8 arranged side by side, and both pressure sensors 8 are connected to corresponding elastic members 5.

[0035] Continue reading Figure 1 and Figure 2 In one embodiment of the present utility model, the elastic member 5 is a telescopic spring, and a plurality of spring mounting shafts 4 for mounting the telescopic springs are arranged on the damper body 3. An annular groove is also provided on the outer wall of the damper body 3 at a position corresponding to the spring mounting shaft 4, and the inner end of the telescopic spring is inserted into the annular groove.

[0036] Continue reading Figure 1 In one embodiment of the present invention, a plurality of connecting support assemblies are arranged around the damper body 3. One end of the connecting support assembly is connected to the tower inner ring sleeve 2, and the other end is connected to the damper body 3. Specifically, the connecting support assembly includes a first mounting seat 6, a second mounting seat 9, and a suspension rope 7. The first mounting seat 6 is arranged on the tower inner ring sleeve 2, the second mounting seat 9 is arranged on the damper body 3, and the suspension rope 7 is connected between the first mounting seat 6 and the second mounting seat 9.

[0037] The connecting support assembly is the supporting component of the entire device. According to the weight of the device, an appropriate number of connecting support assemblies are selected to hang the entire damper above the wind turbine tower 1.

[0038] Continue reading Figure 1 In one embodiment of the present invention, a gap for the cable to pass through is formed between the damper body 3 and the inner ring sleeve 2 of the tower. The damper body 3 is an annular structure, and a rope ladder reserved hole 10 is provided thereon which passes through the upper and lower parts.

[0039] Among them, the gap formed between the damper body 3 and the inner ring sleeve 2 of the tower and the rope ladder reserved hole 10 make the entire damper shape special. The reason is that the electricity generated by wind power generation will be transmitted through the cable connected to the generator. This cable will be laid along the wind turbine tower 1 to the seabed. In addition, when debugging and repairing the wind turbine, the staff must send it to the top of the wind turbine through a rope ladder. Due to these two factors, the entire device adds a gap between the damper body 3 and the inner ring sleeve 2 of the tower and a rope ladder reserved hole 10, which are used for laying cables and installing rope ladders respectively.

[0040] In the present invention, the damper is the core of the entire device and plays a vibration reduction role. As the wind turbine tower 1 shakes, the damper will move in the opposite direction of its shaking due to inertia, thereby offsetting part of the displacement of the wind turbine tower 1. There are several elastic parts 5 around the damper body 3, and their number can be increased or decreased according to actual conditions. In order to position these elastic parts 5, the damper body 3 is fixed with spring positioning shafts 4 with the same number as the elastic parts 5. The elastic parts 5 are fixed to the connected parts by welding. It is the movement of the damper body 3 that drives the compression and stretching of the elastic parts 5, and its pressure or tension will be applied to the pressure sensor 8. Then the pressure sensor 8 generates current due to the force movement, and transmits data to the monitoring equipment through the internal cable.

[0041] The construction process of this utility model is as follows:

[0042] When on land, first install the entire device components, string the telescopic springs one by one to the corresponding spring mounting shaft 4, place the pressure sensor 8 and a series of wires inside the inner ring sleeve 2 of the tower, connect the mounting seat to the connected part through bolts, and then use a crane to cover the damper with the inner ring sleeve 2 of the tower. The telescopic spring can be compressed in advance with a compression tool, and then the telescopic spring is released and inserted into the hole 200 of the inner ring sleeve 2 of the tower. Turn on the power to test and debug the data transmitted by the sensor, so as to identify whether the installation position is wrong or the sensor is damaged.

[0043] After the tower is installed at sea, the tower inner ring sleeve 2 and the damper are lowered from the top opening of the wind turbine tower 1 by a crane. The staff fixes the tower inner ring sleeve 2 to the tower through a series of methods such as welding and hinges, and then installs the lifting rope 7 on the connecting seat. After the power is turned on, the second test is started. After confirming that there are no errors, the installation of other offshore wind power components will continue.

[0044] The working process of this utility model:

[0045] When the wind turbine tower 1 vibrates, the damper body 3 vibrates in the opposite direction, causing the telescopic spring to be compressed and stretched. Because the direction of the force cannot completely coincide with that of one of the springs, there will always be an angle. Therefore, according to the different directions of the force and current magnitudes of the multiple variable pressure sensors 8, the system can infer the direction and magnitude of the force on the wind turbine tower 1, and monitor the vibration amplitude and frequency of the wind turbine tower 1 at any time.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine tower vibration monitoring device, mounted on the top of a wind turbine tower (1), characterized in that: include: A damper, comprising a damper body (3) and a plurality of groups of elastic members (5) distributed around the damper body (3); A plurality of sensor monitoring components, the number of the sensor monitoring components being the same as the number of groups of elastic members (5), the two corresponding one to one, the sensor monitoring components monitoring the stress conditions of the corresponding elastic members (5); as well as A connecting support assembly is provided, wherein the connecting support assembly connects and supports the damper in the wind turbine tower (1).

2. A wind turbine tower vibration monitoring device according to claim 1, characterized in that: It also includes a tower inner ring sleeve (2), which is mounted on the top of the wind turbine tower (1) and sleeved on the outside of the damper. Several sensor monitoring components are arranged on the tower inner ring sleeve (2) and connected to corresponding elastic members (5).

3. A wind turbine tower vibration monitoring device according to claim 2, characterized in that: Several groups of elastic members (5) are evenly distributed around the damper body (3), and several sensor monitoring components are evenly distributed on the tower inner ring sleeve (2).

4. A wind turbine tower vibration monitoring device according to claim 2, characterized in that: The inner wall of the tower inner ring sleeve (2) is surrounded by a plurality of holes (200), and the plurality of sensor monitoring components are arranged in the holes (200) in a one-to-one correspondence.

5. The wind turbine tower vibration monitoring device according to claim 2, characterized in that: There are a plurality of connecting support assemblies, which are distributed around the damper body (3); one end of the connecting support assembly is connected to the tower inner ring sleeve (2), and the other end is connected to the damper body (3).

6. A wind turbine tower vibration monitoring device according to claim 5, characterized in that: The connecting support assembly comprises a first mounting seat (6), a second mounting seat (9) and a suspension rope (7), wherein the first mounting seat (6) is arranged on the tower inner ring sleeve (2), the second mounting seat (9) is arranged on the damper body (3), and the suspension rope (7) is connected between the first mounting seat (6) and the second mounting seat (9).

7. The wind turbine tower vibration monitoring device according to claim 2, characterized in that: A gap for the passage of cables is formed between the damper body (3) and the tower inner ring sleeve (2).

8. The wind turbine tower vibration monitoring device according to claim 1, characterized in that: The sensing monitoring assembly comprises two left and right pressure sensors (8) arranged side by side, and both pressure sensors (8) are connected to corresponding elastic members (5).

9. The wind turbine tower vibration monitoring device according to claim 1, characterized in that: The elastic member (5) is a telescopic spring, and a plurality of spring mounting shafts (4) for mounting the telescopic springs are arranged around the damper body (3).

10. The wind turbine tower vibration monitoring device according to claim 1, characterized in that: The damper body (3) is provided with a rope ladder reserved hole (10) that passes through the damper body up and down.

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