Vibration monitoring device of wind turbine generator tower drum

Abstract

The vibration monitoring device comprises a plurality of fixing assemblies and a vibration sensor, each fixing assembly comprises a shell, a rubber pad and an I-shaped sliding block, one end of each I-shaped sliding block is fixed in one end of a magnetic shell, the other end in the shell is an open cavity, and the vibration sensor is arranged in the open cavity. More than two rubber pads are fixed on the magnetic shell and are positioned at the end part of the I-shaped sliding block, the vibration sensor is fixed on the outer surface of the shell, and the fixing assemblies are movably arranged in a cavity of the shell of another fixing assembly through the other end of the I-shaped sliding block and are matched with each other, so that the end-to-end connection of the plurality of fixing assemblies is realized; according to the utility model, the rapid installation is realized (the working time is obviously shortened), the wide adaptability to the diameter change of the tower drum and the high-reliability vibration monitoring are realized, and a high-efficiency and low-cost field monitoring means is provided for the structural health assessment, fatigue analysis and safety early warning of the tower drum of the wind turbine generator.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine structural safety testing technology, specifically relating to a vibration monitoring device for wind turbine towers. Background Technology

[0002] Health assessment, fatigue analysis, and safety early warning of wind turbine tower structures have always been among the challenges in this field. Wind power, as a clean and renewable energy source, has seen widespread development and application globally in recent years. Its basic principle is to use wind power to rotate the blades of the wind turbine, which then converts mechanical energy into electrical energy through a generator. The wind turbine tower is the load-bearing component, primarily providing support and absorbing vibrations. In practical use, vibration monitoring is necessary to ensure safety and prevent its impact on the wind turbine. With the continuous expansion of wind power installed capacity, tower structure health monitoring has become a crucial link in ensuring the safe and stable operation of wind farms. Traditional vibration monitoring devices mostly rely on fixed installations, which suffer from problems such as complex installation, poor versatility, and inconvenient maintenance. Utility Model Content

[0003] This utility model provides a vibration monitoring device for wind turbine towers, which includes several fixed components and a vibration sensor. The fixed components include a housing, rubber pads, and an I-shaped slider. One end of the I-shaped slider is fixed inside one end of the magnetic housing, and the other end of the housing is an open cavity. Two or more rubber pads are fixed to the magnetic housing and located at the end of the I-shaped slider. The vibration sensor is fixed on the outer surface of the housing. The fixed components are movably disposed in the cavity of the housing of another fixed component through the other end of the I-shaped slider and cooperate with each other to realize the end-to-end connection of multiple fixed components.

[0004] The outer shell is a magnetic shell, which can be attracted to the inner wall of the wind turbine tower by magnetic attraction.

[0005] The rubber pad has several through holes, which optimize the elastic modulus and damping characteristics of the rubber pad, enabling it to maintain radial stiffness while having axial expansion and contraction adjustment capabilities. This ensures a tight fit between the device and the inner wall of the tower and stable transmission of vibration signals. The multiple rubber pads help maintain the stability of the core expansion and contraction structure.

[0006] The fixed components are interconnected through the interlocking structure of the I-shaped sliders, ultimately forming a continuous rigid frame or chain structure that surrounds the inner wall of the tower. The plane in direct contact between the I-shaped sliders and the outer shell is the rigid contact point for the device to transmit vibrations.

[0007] The axial expansion and contraction capacity and certain radial stiffness of perforated rubber pads help optimize their elastic modulus and damping characteristics, potentially balancing compliance and restoring force. As an active "regulator," it can undergo significant axial compression or tensile deformation according to external pressure.

[0008] The advantages and technical effects of this utility model are as follows:

[0009] 1. Excellent versatility: One set of equipment can adapt to the monitoring needs of towers with different heights and diameters;

[0010] 2. Reliable contact: Ensures that the sensor mounting base (via I-shaped slider) is in rigid and tight contact with the tower wall, optimizing the quality of vibration signal transmission.

[0011] 3. Ease of installation: Magnetic initial fixation combined with adaptive adjustment simplifies the installation process. Attached Figure Description

[0012] Figure 1 A schematic diagram of the installation of a vibration monitoring device for a wind turbine tower;

[0013] Figure 2 A schematic diagram of a single unit and its corresponding cross-sectional view;

[0014] Figure 3 This is a schematic diagram of a perforated rubber spring.

[0015] Figure 4 This is a schematic diagram showing the usage status of this device;

[0016] In the diagram: 1-outer shell; 2-rubber pad; 3-I-shaped slider; 4-vibration sensor; 5-inner wall of wind turbine tower. Detailed Implementation

[0017] To better understand the structure and function of this utility model, a specific embodiment of a vibration monitoring device for a wind turbine tower is described in detail below with reference to the accompanying drawings. However, it should be understood that these embodiments are merely illustrative of preferred solutions and do not constitute a limitation on the scope of protection of this utility model.

[0018] Example 1: As Figure 1-3As shown, the vibration monitoring device for the wind turbine tower includes several fixed components and a vibration sensor 4. The fixed components include a housing 1, rubber pads 2, and an I-shaped slider 3. The housing 1 is a magnetic housing (neodymium iron boron magnet + 304 stainless steel housing). The I-shaped slider 3 is I-shaped with protruding tenons at both ends and is made of high-strength aluminum alloy (anodized surface). One end of the I-shaped slider 3 is fixed inside one end of the magnetic housing 1, and the other end of the housing 1 is an open cavity. Five rubber pads 2 are fixed to the magnetic housing 1 and located at the end of the I-shaped slider 3. The rubber pads 2 have several through holes and are made of high-damping silicone rubber. The vibration sensor 4 is fixed on the outer surface of the housing 1 and located at the contact point between the I-shaped slider and the housing. The fixed components are movably set in the cavity of the housing of another fixed component through the other end of the I-shaped slider 3 and cooperate with each other to realize the end-to-end connection of multiple fixed components.

[0019] The vibration sensor is encapsulated in a sensing module with an IP67 protection rating and supports wired or wireless signal transmission.

[0020] Before installation, the number of fixing components to be used can be determined according to the tower diameter. The fixing components are connected end to end by I-shaped sliders, and the device is attracted to the inner wall of the wind turbine tower by the magnetic housing. The movable end of the I-shaped slider is used for adjustment to ensure that the entire device is in close contact with the inner wall 5 of the wind turbine tower. Vibration is detected by sensors on the fixing components. Figure 4 ).

Claims

1. A wind turbine tower vibration monitoring apparatus, characterized by: It includes several fixing components and a vibration sensor (4). The fixing components include a housing (1), rubber pads (2), and an I-shaped slider (3). One end of the I-shaped slider (3) is fixed inside one end of the magnetic housing (1), and the other end of the housing (1) is an open cavity. Two or more rubber pads (2) are fixed to the magnetic housing (1) and located at the end of the I-shaped slider (3). The vibration sensor (4) is fixed on the outer surface of the housing (1) and located at the contact point between the I-shaped slider and the housing. The fixing components are movably set in the cavity of the housing of another fixing component through the other end of the I-shaped slider (3) and cooperate with each other to realize the connection of multiple fixing components end to end.

2. The wind turbine tower vibration monitoring apparatus of claim 1, wherein: The outer shell (1) is a magnetic shell.

3. The wind turbine tower vibration monitoring apparatus of claim 1, wherein: Vibration monitoring devices are installed on the inner wall of the wind turbine tower.

4. The wind turbine tower vibration monitoring apparatus of claim 1, wherein: The rubber pad (2) has several through holes.

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