Intermittent monitoring device for play displacement of main shaft of wind generating set

Abstract

The utility model provides a wind generating set main shaft play displacement intermittent monitoring device, which is used for monitoring the axial displacement of a main shaft on a generator main body, and comprises a hoop assembly, a mounting frame and a displacement sensor, the hoop assembly is sleeved on the main shaft, and a plurality of groups of reflecting plates are arranged on the hoop assembly at intervals in the circumferential direction. And the mounting rack is arranged on the generator main body and is connected with the generator main body through a fixing bolt. The displacement sensor is arranged at the end part of the mounting frame, and the monitoring end of the displacement sensor is aligned with the motion area of the reflecting plate. According to the device, the displacement of the main shaft can be monitored in real time through the displacement sensor, data screening and threshold value judgment are carried out on intermittent monitoring data, and faults such as looseness and breakage of a main shaft fastener can be effectively monitored. And when the wind driven generator main body needs to be maintained, only fixing bolts on the hoop assembly and the mounting frame need to be dismounted, the mounting and dismounting processes are very simple, and the time cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to an intermittent monitoring device for the displacement of a main shaft of a wind generator set. Background Art

[0002] Spindle movement in wind turbines, caused by improper installation, misalignment, loose fastening bolts, and other factors, can seriously impact the normal operation of wind turbines, exacerbate turbine vibration, and cause failures in components such as the mainshaft bearings, gearbox high-speed shaft bearings, couplings, and generator bearings. Online monitoring of spindle movement effectively captures the actual multi-dimensional displacement of the mainshaft during operation. Combined with a wind turbine vibration monitoring system, this system can establish an effective data analysis model and quantify the impact of spindle movement on bearing motion. This allows for effective detection of loose and broken spindle fasteners, preventing major accidents.

[0003] For example, the Chinese utility model patent with publication number CN217300774U provides a wind turbine main shaft displacement monitoring device, including a base; a light source assembly, which provides a continuous light source; a collimating optical assembly, which transmits the light source; a plurality of Dove prisms; a plurality of Dove prisms attached to the main shaft and arranged circumferentially, the Dove prisms having two reflecting surfaces; an imaging optical assembly; and a PSD position sensor, which corresponds to the imaging optical assembly.

[0004] For example, the Chinese utility model patent with publication number CN221503442U provides a wind turbine main shaft displacement detection device, including a bearing seat, a main shaft front bearing is fixedly installed at one end of the top of the bearing seat, and a main shaft rear bearing is fixedly installed at the other end of the top of the bearing seat, and the wind turbine main shaft is installed between the main shaft front bearing and the main shaft rear bearing.

[0005] By analyzing the above patents and combining them with actual conditions, it is found that most of the existing devices for monitoring the displacement of the main shaft of a wind turbine have problems such as complicated installation process and high time cost during installation, which is not conducive to the later maintenance of the wind turbine. Therefore, a device for intermittent monitoring of the displacement of the main shaft of a wind turbine is proposed to solve the above technical problems. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the utility model proposes an intermittent monitoring device for the displacement of the main shaft of a wind turbine generator set to solve the problem that most of the existing devices for monitoring the displacement of the main shaft of a wind turbine proposed in the above background technology have complex installation processes and high time costs, which leads to technical problems that are not conducive to the later maintenance of the wind turbine.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wind turbine main shaft displacement discontinuous monitoring device for monitoring the axial displacement of the main shaft on the generator body, comprising:

[0008] A hoop assembly is sleeved on the main shaft, and a plurality of groups of reflective plates are arranged annularly at intervals on the hoop assembly;

[0009] A mounting frame is provided on the generator body and connected thereto via fixing bolts; and

[0010] The displacement sensor is arranged at the end of the mounting frame, and the monitoring end thereof is aligned with the movement area of ​​the reflector.

[0011] In a preferred embodiment, the clamp assembly includes:

[0012] There are two sets of mounting arc plates arranged opposite to each other, and the two sets of mounting arc plates cooperate to form a cavity for accommodating the main shaft, and the reflector is fixedly arranged on the mounting arc plates;

[0013] Connecting plates are provided at both ends of the mounting arc plates, with each two groups of connecting plates being fitted together; and

[0014] The connecting bolts are passed through two groups of the connecting plates.

[0015] In a preferred embodiment, the mounting frame is Z-shaped, and one end thereof extends to a side of the reflector away from the generator body.

[0016] In a preferred embodiment, the mounting bracket extends to a side of the reflector away from the generator body and is provided with a mounting hole, and the displacement sensor is passed through the mounting hole and fixedly connected thereto.

[0017] In a preferred embodiment, a non-slip washer is provided on the contact surface between the fixing bolt and the mounting bracket.

[0018] In a preferred embodiment, the fixing bolts are installed through holes provided on the generator body.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] During installation, the clamp assembly can be fixed to the main shaft to quickly complete the installation of multiple sets of reflectors. After the displacement sensor is fixed to the mounting frame, the mounting frame is then fixed to the generator body with fixing bolts to complete the installation of the displacement sensor. During the monitoring process, the main shaft of the wind turbine rotates, driving the movement of the reflectors. The displacement sensor can monitor the displacement of the main shaft in real time. Data screening and threshold determination are performed on intermittent monitoring data, which can effectively detect faults such as loosening and breakage of main shaft fasteners. When maintenance of the wind turbine body is required, only the clamp assembly and the fixing bolts on the mounting frame need to be removed. The installation and removal process is very simple, greatly saving time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 This is a front view of a wind turbine main shaft displacement discontinuous monitoring device provided by the utility model;

[0023] Figure 2 for Figure 1 A magnified schematic diagram of area a in the middle;

[0024] Figure 3 The utility model is a schematic structural diagram of an arc plate installed in a device for discontinuously monitoring the displacement of the main shaft of a wind turbine generator set.

[0025] Figure 4 The utility model is a schematic structural diagram of a mounting frame in a device for discontinuously monitoring the movement and displacement of the main shaft of a wind turbine generator set.

[0026] Reference numerals:

[0027] 1. Generator body; 11. Main shaft;

[0028] 2. Install the arc plate; 21. Connecting plate; 22. Connecting bolts; 23. Reflector;

[0029] 3. Mounting bracket; 31. Fixing bolt; 32. Anti-slip washer; 33. Mounting hole; 34. Displacement sensor. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technicians in this field can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0031] Example:

[0032] like Figure 1 、 2 As shown in Figure 3, the utility model provides an intermittent monitoring device for the displacement of the main shaft of a wind turbine generator set, which is used to monitor the axial displacement of the main shaft 11 on the generator body 1, including a clamp assembly, which is sleeved on the main shaft 11, and a plurality of groups of reflective plates 23 are arranged circumferentially at intervals on the clamp assembly. The clamp assembly includes two groups of relatively arranged mounting arc plates 2, and the two groups of mounting arc plates 2 cooperate to form a cavity for accommodating the main shaft 11. The reflective plates 23 are fixedly arranged on the mounting arc plates 2. Connecting plates 21 are provided at both ends of the mounting arc plates 2. Every two groups of connecting plates 21 are in contact with each other, and every two groups of connecting plates 21 are connected by a group of connecting bolts 22.

[0033] The reflective plates 23 can be fixedly connected to the mounting arc plates 2 during the production process. Depending on the material of the reflective plates 23, the reflective plates 23 can be pre-installed by bonding, bolting, or welding. The mounting arc plates 2 are then clamped onto the spindle 11 and the two sets of connecting plates 21 are connected via a set of connecting bolts 22. This allows for the rapid fixing of multiple sets of reflective plates 23, eliminating the need to secure each set of reflective plates 23 individually. This improves the efficiency of installing multiple sets of reflective plates 23. Furthermore, it is understood that in some embodiments, anti-slip sheets can be added to the inside of the mounting arc plates 2 to prevent displacement between the spindle 11 and the mounting arc plates 2 during rotation, thereby improving the stability of subsequent data monitoring.

[0034] like Figure 2 、 4 As shown, in this embodiment, a mounting bracket 3 is provided on the generator body 1, and the mounting bracket 3 is connected to the generator body 1 through a fixing bolt 31. A displacement sensor 34 is provided at the end of the mounting bracket 3, and the monitoring end of the displacement sensor 34 is aligned with the movement area of ​​the reflector 23.

[0035] Mounting bracket 3 is Z-shaped, with one end extending to the side of reflector 23 away from generator body 1. A non-slip washer 32 is installed on the contact surface between fixing bolt 31 and mounting bracket 3. Mounting bracket 3 has a mounting hole 33 formed on the side of reflector 23 away from generator body 1. A displacement sensor 34 is inserted into mounting hole 33 and fixedly connected to it.

[0036] Mounting bracket 3 can be installed using fixing bolts 31, ensuring that one end of mounting bracket 3 extends to the side of reflector 23 away from generator body 1. Reflector 23 is positioned on the side of mounting arc plate 2 away from generator body 1 to prevent positional interference between connecting plate 21 and displacement sensor 34 when main shaft 11 rotates. Anti-slip washers 32 are also provided to improve the stability of mounting bracket 3 after installation, preventing it from slipping. During operation of the generator set, the rotation of main shaft 11 drives multiple sets of reflectors 23 to sequentially pass by displacement sensor 34, allowing the displacement sensor 34 to intermittently monitor the displacement of main shaft 11.

[0037] like Figure 2 、 4 As shown, in this embodiment, the fixing bolts 31 are installed through the holes provided on the generator body 1, which has the characteristics of small modification, easy installation and low cost.

[0038] Specific usage and beneficial effects of this utility model:

[0039] During installation, the device can be fixed to the main shaft 11 by fixing the clamp assembly to the main shaft 11 to quickly complete the installation of multiple sets of reflective plates 23. After fixing the displacement sensor 34 to the mounting frame 3, the mounting frame 3 is then fixed to the generator body 1 via the fixing bolts 31 to complete the installation of the displacement sensor 34. During the monitoring process, the main shaft 11 of the wind turbine rotates to drive the reflective plates 23 to move. The displacement of the main shaft 11 can be monitored in real time through the displacement sensor 34. Data screening and threshold determination are performed for intermittent monitoring data, which can effectively monitor faults such as loosening and breakage of the main shaft 11 fasteners. When maintenance is required on the wind turbine body 1, only the clamp assembly and the fixing bolts 31 on the mounting frame 3 need to be removed. The installation and removal processes are very simple, greatly saving time and cost.

[0040] The above shows and describes the basic principles, main features, and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments. It is obvious to those skilled in the art that modifications or improvements can be made based on the present invention. Therefore, such modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A wind turbine main shaft displacement discontinuous monitoring device for monitoring the axial displacement of a main shaft (11) on a generator body (1), characterized in that: Includes: A hoop assembly is sleeved on the main shaft (11), and a plurality of groups of reflective plates (23) are arranged annularly at intervals on the hoop assembly; A mounting frame (3) is provided on the generator body (1) and is connected thereto via fixing bolts (31); and A displacement sensor (34) is arranged at the end of the mounting frame (3), and a monitoring end thereof is aligned with the movement area of ​​the reflective plate (23).

2. The intermittent monitoring device for main shaft displacement of a wind turbine generator set according to claim 1 is characterized in that: The clamp assembly includes: There are two sets of mounting arc plates (2) arranged opposite to each other, and the two sets of mounting arc plates (2) cooperate to form a cavity for accommodating the main shaft (11), and the reflecting plate (23) is fixedly arranged on the mounting arc plates (2); Connecting plates (21) are arranged at both ends of the mounting arc plate (2), and each two groups of connecting plates (21) are fitted together; and The connecting bolts (22) are passed through two groups of the connecting plates (21).

3. The intermittent monitoring device for main shaft displacement of a wind turbine generator set according to claim 1, characterized in that: The mounting frame (3) is Z-shaped, and one end thereof extends to a side of the reflector (23) away from the generator body (1).

4. The intermittent monitoring device for main shaft displacement of a wind turbine generator set according to claim 3, characterized in that: The mounting frame (3) extends to a side of the reflector (23) away from the generator body (1) and is provided with a mounting hole (33); the displacement sensor (34) is inserted into the mounting hole (33) and fixedly connected thereto.

5. The intermittent monitoring device for main shaft movement displacement of a wind turbine generator set according to claim 1, characterized in that: The contact surface between the fixing bolt (31) and the mounting frame (3) is provided with an anti-slip washer (32).

6. The intermittent monitoring device for main shaft displacement of a wind turbine generator set according to claim 1, characterized in that: The fixing bolts (31) are installed through holes provided on the generator body (1).

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