A vibration detection device for axial flow wind turbine installation

Abstract

This utility model discloses a vibration detection device for the installation of an axial flow fan motor, relating to the field of vibration detection technology. It includes a vacuum disk with its opening mounted on the axial center of the axial flow fan motor surface; an extension fixed to the outer axial center of the vacuum disk; an assembly lever that slides along the surface of the extension; a pressure sensor fixed to the axial end of the assembly lever; and a cap inserted into the outer axial direction of the pressure sensor for mounting to the outside of the internal rotating shaft of the axial flow fan motor. This utility model uses the vacuum disk to adhere to the axial center of the axial flow fan motor surface, ensuring that the detection reference is aligned with the rotation center of the equipment. Utilizing the slidable assembly lever on the extension and its end pressure sensor, along with the cap inserted into the outside of the rotating shaft, it achieves direct capture of mechanical vibrations transmitted by the rotating shaft during the installation and commissioning phase, and instantly triggers an electrical signal output.

Description

Technical Field

[0001] This utility model relates to the field of vibration detection technology, specifically to a vibration detection device for axial flow fan motor installation. Background Technology

[0002] The vibration detection device installed on the axial flow wind turbine is a key piece of equipment used to monitor the vibration status of the wind turbine in real time, aiming to prevent mechanical failures, efficiency reduction and safety accidents caused by excessive vibration.

[0003] A search revealed that Chinese utility model patent application CN222772367U proposes "an axial flow fan that avoids resonance." This invention involves setting up a first vibration probe, a second vibration probe, a counterweight, and a third motor. The first and second vibration probes detect the vibration frequency of the axial flow fan body and the vibration frequencies on both sides of the support frame. The transmitted data is analyzed, and the vibration frequencies of the axial flow fan body and the support frame are adjusted based on the analysis results, thereby avoiding resonance and improving the service life of the axial flow fan.

[0004] However, in actual use, the vibration probes of the aforementioned and similar devices are usually fixed to the surface of the equipment housing or support, making it difficult to directly capture the original mechanical vibration signals of the rotating shaft system, resulting in the measurement data being attenuated by structural transmission. Utility Model Content

[0005] The purpose of this invention is to provide a vibration detection device for axial flow fan motor installation, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vibration detection device for an axial flow fan motor includes:

[0008] Vacuum disc, with the disc opening mounted on the axial flow fan motor at the center of the shaft;

[0009] The extension is fixed to the outer axis of the vacuum disk body;

[0010] The folding rod is assembled to form a sliding connection with the surface of the extension;

[0011] The pressure sensor is fixed to the axial end of the assembly lever;

[0012] A cap is inserted into the axial outside of the pressure sensor for mounting to the outside of the internal rotating shaft of the axial flow fan.

[0013] When the axial flow fan is in the installation and commissioning stage, the vibration is transmitted to the rotating shaft and drives the cap to contact the pressure sensor, triggering the generation of an electrical signal characterizing the mechanical vibration.

[0014] Furthermore, the assembly folding rod is provided in a plurality of such folding rods, which are evenly distributed at equal angles with the axis of the extension as the center point.

[0015] Furthermore, the surface of the extension is fixed with several sliding groove seats, and the bottom of the assembly lever away from the pressure sensor is fixed with a sliding pin, which is compatible with the sliding groove seats.

[0016] Furthermore, the extension is designed as a tube structure and is connected to the interior of the vacuum disk, with a force-bearing plug rod slidably connected inside the extension.

[0017] Furthermore, the force-bearing plug rod includes a plug head and a force-bearing rod, with one end of the force-bearing rod facing the inside of the vacuum disk and one side of the plug head fixed together, and the outer diameter of the plug head and the inner diameter of the extension being adapted to each other.

[0018] Furthermore, the pressure sensor can be replaced with a speed sensor.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The vibration detection device installed on this axial flow fan motor uses a vacuum disk to adhere to the center of the axial flow fan motor surface, ensuring that the detection reference is aligned with the rotation center of the equipment. By utilizing the sliding mounting lever on the extension and its end pressure sensor, along with the cap inserted outside the rotating shaft, the device can directly capture the mechanical vibration transmitted by the rotating shaft during the installation and commissioning phase and instantly trigger the output of an electrical signal.

[0021] In addition, the design of multiple sets of equally angled assembly folding rods makes the vibration detection coverage more comprehensive and can effectively identify the differences in vibration components in different directions. The matching structure of the slide seat and the sliding pin not only ensures the radial sliding freedom of the assembly folding rod to adapt to rotating shafts of different sizes, but also ensures the stability and reliability of the sensor in the vibration transmission process.

[0022] Finally, the extension component, acting as a connecting tube, has a force-bearing plug rod inside that can convert changes in negative pressure within the vacuum disk into axial displacement, providing an auxiliary monitoring method for judging the adhesion strength. Attached Figure Description

[0023] Fig. 1 This is an isometric drawing of the present invention;

[0024] Fig. 2 This is a diagram showing the internal structure of the present invention;

[0025] Fig. 3 This is the main cross-sectional view of the present invention.

[0026] In the diagram: 1. Vacuum disc; 2. Cap; 3. Pressure sensor; 4. Assembly lever; 5. Slide seat; 6. Force-bearing plug rod; 7. Sliding pin. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Before understanding the technical solution proposed in this application, it is important to understand that axial flow fans may experience vibrations during installation and commissioning due to assembly deviations or shaft imbalances. This device aims to capture and quantify such mechanical vibrations in real time for timely adjustments and optimizations. The following is in conjunction with the appendix... Figs. 1-3 Detailed description of the specific implementation method of this device:

[0029] During operation, first attach the vacuum disk 1 to the surface of the wind turbine, adjust the position of the sliding pin 7 of the assembly lever 4 in the slide seat 5 to accommodate different shaft diameters, then assemble the cap 2 to the outside of the pressure sensor 3. After starting the wind turbine, observe the output signal of the pressure sensor 3. If the vibration exceeds the standard, the assembly accuracy can be adjusted through the displacement feedback of the force-bearing plug 6. In addition, the pressure sensor 3 can be replaced with a speed sensor to monitor the rotational speed fluctuation of the rotating shaft, thus expanding the application range of the device.

[0030] Specifically, such as Figs. 1-3 As shown, this solution includes:

[0031] Vacuum disk 1, with a disk opening designed for direct mounting on the axial flow fan's surface at the center position for basic positioning; extension component, which is firmly fixed to the outer center position of the vacuum disk 1; mounting lever 4, with the lever body and the outer surface of the extension component forming a precision sliding connection; pressure sensor 3, which is rigidly fixed to the axial end position of the mounting lever 4 for accurately sensing pressure changes; cap 2, which is inserted into the axial outer housing of the pressure sensor 3, and whose function is to be mounted on the outside of the internal rotating shaft of the axial flow fan as a vibration transmission interface.

[0032] It should be noted that in this embodiment, when the axial flow fan is in the installation and commissioning stage, the vibration energy generated by the operation of the equipment is transmitted to the rotating shaft, which in turn drives the cap 2 to produce displacement and contact the sensing surface of the pressure sensor 3, thereby triggering the pressure sensor 3 to generate an electrical signal characterizing the intensity of mechanical vibration.

[0033] As a preferred embodiment, in this embodiment, to enhance system stability and detection sensitivity, several assembly folding rods 4 are provided. These assembly folding rods 4 are arranged in a uniform ring distribution with the geometric axis of the extension as the reference point.

[0034] As a preferred embodiment, in order to achieve controllable sliding of the assembly lever 4 relative to the extension, a number of specially made sliding groove seats 5 are fixedly installed on the surface of the extension. Correspondingly, at the bottom of the assembly lever 4 away from the pressure sensor 3, a sliding pin 7 is rigidly fixed. The geometric shape of the sliding pin 7 is precisely matched with the inner cavity contour of the sliding groove seat 5 to form a sliding pair.

[0035] It should also be noted that in this embodiment, the extension adopts a hollow tube structure design, and its internal cavity is connected to the internal space of the vacuum disk 1. In the internal cavity of the extension, a force-bearing plug rod 6 that can move axially is slidably connected.

[0036] It should also be noted that in this embodiment, the force-bearing plug rod 6 includes a cylindrical plug head and a slender force-bearing rod. One end of the force-bearing rod facing the inside of the vacuum disk 1 is fixed to one end face of the plug head, wherein the outer diameter of the plug head and the inner diameter of the inner cavity of the extension form a high-precision clearance fit, which ensures smooth sliding and effectively transmits axial force.

[0037] Finally, it should be added that, depending on the actual testing requirements, pressure sensor 3 can be replaced with a speed sensor of the same interface specification.

[0038] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A vibration detection device for an axial flow fan motor installation, characterized in that, include: Vacuum disk (1), the disk opening is installed at the center of the axial flow fan; The extension is fixed to the outer axis of the vacuum disk (1); The folding rod (4) is assembled to form a sliding connection with the surface of the extension; Pressure sensor (3) is fixed to the axial end of assembly lever (4); Cap (2) is inserted into the outside of the pressure sensor (3) and is used to assemble it to the outside of the internal rotating shaft of the axial flow fan. When the axial flow fan is in the installation and commissioning stage, the vibration is transmitted to the rotating shaft and drives the cap (2) to contact the pressure sensor (3), triggering the generation of an electrical signal characterizing the mechanical vibration.

2. The vibration detection device for an axial flow fan motor as described in claim 1, characterized in that: The assembly folding rod (4) is provided in several parts, and the several assembly folding rods (4) are evenly distributed at equal angles with the axis of the extension as the center point.

3. The vibration detection device for axial flow fan installation according to claim 1, characterized in that: The surface of the extension is fixed with several sliding seats (5), and the bottom of the assembly lever (4) away from the pressure sensor (3) is fixed with a sliding pin (7), which is compatible with the sliding seat (5).

4. The vibration detection device for axial flow fan installation according to claim 1, characterized in that: The extension is designed as a tube structure and is connected to the interior of the vacuum disk (1). The extension is slidably connected to a force-bearing plug rod (6).

5. The vibration detection device for axial flow fan installation according to claim 4, characterized in that: The force-bearing plug (6) includes a plug head and a force-bearing rod. One end of the force-bearing rod facing the inside of the vacuum disk (1) is fixed to one side of the plug head. The outer diameter of the plug head is adapted to the inner diameter of the extension.

6. The vibration detection device for axial flow fan installation according to claim 1, characterized in that: The pressure sensor (3) can be replaced by a speed sensor.

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