Wind turbine generator internal bolt fracture monitoring device based on acoustic emission

Abstract

The utility model discloses a wind turbine generator internal bolt fracture monitoring device based on acoustic emission, which comprises a frame body, an acoustic emission instrument and a probe are arranged in the frame body, an electric wire is connected between the acoustic emission instrument and the probe, and a handle is fixed on one side of the frame body; the protection mechanism is located between the frame body and the probe and used for protecting the probe, and the protection mechanism comprises an extrusion assembly, a ventilation assembly and a driving assembly; through the arrangement of the protection mechanism, the probe can be covered and protected, the situation that the surface of the probe is scratched and damaged or internal elements are loosened due to the fact that the probe is likely to collide and rub with the bottom plate is avoided, it is ensured that the probe can be normally used, the service life of the probe is greatly prolonged, and the replacement frequency and the maintenance cost are reduced; and meanwhile, the problems that in an existing device, when the probe is stored in an unstable environment, the performance of the probe is unstable, and false alarm or missing alarm occurs are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine generator sets, in particular to a device for monitoring the internal bolt fracture of a wind turbine generator set based on acoustic emission. Background Art

[0002] The wind turbine internal bolt fracture monitoring device is a device specially designed to monitor the status of the internal bolts of the wind turbine in real time, ensuring the safety and reliability of the wind turbine. At the same time, it can effectively reduce the failure shutdown of the wind turbine due to bolt fracture, improve the reliability and maintenance efficiency of the unit operation, reduce operating costs, and extend the service life of the equipment.

[0003] After searching, the Chinese patent number CN221667678U discloses a wind turbine bolt fracture monitoring device. The probe is removed from between the first plywood and the second plywood, and the wire is removed from the hook. In this way, the acoustic emission instrument can perform detailed monitoring of each bolt connected to the wind turbine through the wire and the probe. There is no need to install a detector on each bolt, so the actual use cost is lower. Moreover, the bolt fracture monitoring scheme in the device will not be affected by loose bolts, etc., and the monitoring accuracy is higher. After the bolt fracture monitoring work is completed, the wire can be wrapped around the hook, and then the barrier rod can be pulled to the right so that the barrier rod cooperates with the corresponding fourth vertical plate to squeeze the spring, causing the spring to undergo elastic deformation, and then the probe is placed between the first plywood and the second plywood, and the barrier rod is loosened so that the first plywood and the second plywood cooperate with the spring to clamp the probe, which is convenient for carrying and organizing.

[0004] However, it is difficult for the above-mentioned device to protect the probe during use, which makes it easy for the probe to collide and rub against the base plate, causing scratches, damage to the probe surface or loosening of internal components, which not only affects the normal use of the probe, but also greatly shortens its service life, increases the replacement frequency and maintenance cost. At the same time, storing the probe in an unstable environment will lead to unstable probe performance, false alarms or missed alarms, thereby affecting the operation safety and stability of the entire wind turbine. Based on this, the utility model designs a wind turbine internal bolt fracture monitoring device based on acoustic emission to solve the above problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a device for monitoring bolt fracture inside a wind turbine based on acoustic emission, so as to solve the problem in the above-mentioned background technology that it is difficult to protect the probe, which causes the probe to easily collide and rub with the base plate, resulting in scratches and damage on the probe surface or loosening of internal components.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a device for monitoring bolt fracture inside a wind turbine based on acoustic emission, comprising:

[0007] A frame, wherein an acoustic emission instrument and a probe are installed inside the frame, an electric wire is connected between the acoustic emission instrument and the probe, and a handle is fixed to one side of the frame;

[0008] The protective mechanism is located between the frame and the probe and is used to protect the probe. The protective mechanism includes an extrusion assembly, a ventilation assembly and a drive assembly. The extrusion assembly is located inside the frame and is used to extrude and fix the probe. The ventilation assembly is located on both sides of the extrusion assembly and is used to ventilate the probe after extrusion and fixation. The drive assembly is located inside the frame and is used to drive the extrusion assembly to move.

[0009] Preferably, the extrusion assembly includes a fixed plate fixed inside the frame and a movable plate movably installed inside the frame, the top of the fixed plate is hinged with a rotating plate, an arc groove for inserting the power supply line is provided between the rotating plate and the movable plate, and a limiting assembly for limiting the movable plate is provided between the rotating plate and the movable plate, and an extrusion seat and a fixed seat corresponding to the probe are fixed between the movable plate and the fixed plate.

[0010] Preferably, the limiting assembly includes a plurality of evenly distributed limiting rods fixed on one side of the movable plate, a plurality of limiting holes are opened on one side of the rotating plate, and the plurality of limiting rods correspond to the plurality of limiting holes.

[0011] Preferably, the driving assembly includes a fixed groove and a sliding groove opened on the top of the frame, a threaded rod is rotatably installed inside the fixed groove, a threaded block is screwed to the outer wall of the threaded rod, the threaded block is fixed to the movable plate, and two sliders are fixed to the bottom of the movable plate, and the two sliders cooperate with the sliding groove.

[0012] Preferably, the ventilation assembly includes dustproof plates fixed on both sides of the movable plate, and the temples of the two dustproof plates are provided with ventilation holes, and the ventilation holes correspond to the probes.

[0013] Preferably, a positioning mechanism for positioning the sound emission instrument is provided between the frame and the sound emission instrument, and the positioning mechanism includes an open groove and a groove body opened on both sides of the frame, and a movable bar and a slide bar are fixed on both sides of the sound emission instrument, the movable bar cooperates with the open groove, and the slide bar cooperates with the groove body, and an insertion rod and a positioning rod are respectively inserted into the interior of the slide bar and the movable bar, and a control component for controlling them is provided on one side of the insertion rod and the positioning rod.

[0014] Preferably, the control assembly includes a control seat fixed on one side of the frame and two linkage sleeves fixed on one side of the insertion rod and the positioning rod, a linkage plate is fixed between the two linkage sleeves, one of the linkage sleeves extends to the interior of the control seat and is fixed with a movable rod, the movable rod extends to one side of the control seat and is fixed with a control rod, a spring is connected between one of the linkage sleeves and the control seat, the spring sleeve is arranged on the outer wall of the movable rod, and a groove for the linkage plate to move is provided at the bottom of the control seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: a device for monitoring bolt fracture inside a wind turbine generator set based on acoustic emission can cover and protect the probe through the setting of a protective mechanism, thereby preventing the probe from easily colliding and rubbing with the base plate, causing scratches, damage to the probe surface or loosening of internal components, ensuring that the probe can be used normally, greatly extending its service life, reducing replacement frequency and maintenance costs, and solving the problem in the prior art that the probe is stored in an unstable environment, which leads to unstable probe performance, false alarms or missed alarms, and thus affects the safety and stability of the entire wind turbine operation;

[0016] By setting up the positioning mechanism, the acoustic emission instrument can be positioned to ensure the accuracy of the monitoring data. When the instrument is in a fixed state, it can more clearly capture the early acoustic emission signals of faults such as bolt breakage, ensure the reliability of monitoring, and further improve the accuracy of the monitoring of this device. At the same time, by reducing the shaking of the instrument, it can be kept working within the optimal monitored range, ensuring the comprehensiveness and effectiveness of the monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the frame of the utility model;

[0019] Figure 3 This is one of the structural diagrams of the protective mechanism of the utility model when it is disassembled;

[0020] Figure 4 This is the second structural diagram of the protective mechanism of the utility model when it is disassembled;

[0021] Figure 5 This is a structural diagram of the positioning mechanism of the utility model;

[0022] Figure 6 This is a structural diagram of the positioning mechanism of the utility model when it is disassembled.

[0023] In the figure: 1. frame; 2. acoustic emission instrument; 3. protection mechanism; 4. positioning mechanism; 5. handle; 6. probe;

[0024] 31. Moving plate; 32. Fixed plate; 33. Rotating plate; 34. Slider; 35. Threaded block; 36. Threaded rod; 37. Fixed seat; 38. Extrusion seat; 39. Limit rod;

[0025] 41. Control seat; 42. Spring; 43. Slider; 44. Moving bar; 45. Insert rod; 46. Linkage plate; 47. Positioning rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Please refer to Figure 1 and Figure 4 The present invention provides a technical solution: a device for monitoring bolt fracture inside a wind turbine based on acoustic emission, comprising:

[0028] The frame 1 has an acoustic emission instrument 2 and a probe 6 installed inside. An electric wire is connected between the acoustic emission instrument 2 and the probe 6. A handle 5 is fixed on one side of the frame 1.

[0029] Please refer to Figure 2 、 Figure 3 and Figure 4 , protective mechanism 3, the protective mechanism 3 is located between the frame 1 and the probe 6 and is used to protect the probe 6, the protective mechanism 3 includes an extrusion assembly, a ventilation assembly and a drive assembly, the extrusion assembly is located inside the frame 1 and is used to extrude and fix the probe 6, the ventilation assembly is located on both sides of the extrusion assembly and is used to ventilate the probe 6 after extrusion and fixation, the drive assembly is located inside the frame 1 and is used to drive the extrusion assembly to move, the extrusion assembly includes a fixed plate 32 fixed inside the frame 1 and a movable plate 31 movably installed inside the frame 1, the top of the fixed plate 32 is hinged with a rotating plate 33, and an arc groove for inserting the power supply line is jointly opened between the rotating plate 33 and the movable plate 31, and a limiter for limiting the movable plate 31 is provided between the rotating plate 33 and the movable plate 31. The positioning assembly, an extrusion seat 38 and a fixed seat 37 corresponding to the probe 6 are fixed between the movable plate 31 and the fixed plate 32, the limiting assembly includes a plurality of evenly distributed limiting rods 39 fixed on one side of the movable plate 31, and a plurality of limiting holes are opened on one side of the rotating plate 33, and the plurality of limiting rods 39 correspond to the plurality of limiting holes. The driving assembly includes a fixed groove and a slide groove opened on the top of the frame 1, and a threaded rod 36 is rotatably installed inside the fixed groove. The outer wall of the threaded rod 36 is screwed with a threaded block 35, and the threaded block 35 is fixed to the movable plate 31. Two sliders 34 are fixed to the bottom of the movable plate 31, and the two sliders 34 cooperate with the slide groove. The ventilation assembly includes dustproof plates fixed on both sides of the movable plate 31, and the temporal parts of the two dustproof plates are provided with ventilation holes, and the ventilation holes correspond to the probe 6.

[0030] The screw rod 36 is then rotated to move the screw block 35 on its outer wall. The movement of the screw block 35 drives the movable plate 31 to move, and the movement of the movable plate 31 drives the extrusion seat 38 to move. The movement of the extrusion seat 38 enables the probe 6 to be effectively clamped between the fixed seat 37 and the extrusion seat 38. The cooperation between the slider 34 and the slide groove makes the movable plate 31 smoother in the movement process. The movement of the movable plate 31 enables the limiting rod 39 to be plugged into the limiting hole, so that the movable plate 31 can be effectively limited. At the same time, the dustproof plate is synchronously moved until the dustproof plate is moved to a position that fits the fixed plate 32 to achieve a sealing effect. The setting of the ventilation hole enables the probe 6 to be effectively ventilated between the movable plate 31 and the fixed plate 32. Finally, the rotating plate 33 is rotated to wrap the wire through the arc groove.

[0031] Please also refer to Figure 1 、 Figure 5 and Figure 6 A positioning mechanism 4 for positioning the sound emission instrument 2 is provided between the frame 1 and the sound emission instrument 2. The positioning mechanism 4 includes an open groove and a groove body on both sides of the frame 1. A moving bar 44 and a slide bar 43 are fixed on both sides of the sound emission instrument 2. The moving bar 44 cooperates with the open groove, and the slide bar 43 cooperates with the groove body. The interior of the slide bar 43 and the moving bar 44 are respectively plugged with an insertion rod 45 and a positioning rod 47. One side of the insertion rod 45 and the positioning rod 47 is provided with a control component for controlling it. The control component includes a control seat 41 fixed on one side of the frame 1 and two linkage sleeves fixed on one side of the insertion rod 45 and the positioning rod 47. A linkage plate 46 is fixed between the two linkage sleeves, one of which extends to the interior of the control seat 41 and is fixed with a movable rod. The movable rod extends to one side of the control seat 41 and is fixed with a control rod. A spring 42 is connected between one linkage sleeve and the control seat 41. The spring 42 is sleeved on the outer wall of the movable rod. The bottom of the control seat 41 is provided with a groove for moving the linkage plate 46.

[0032] First, pull the control rod to drive the movable rod to move, and the movement of the movable rod drives one of the linkage sleeves to move, and the movement of one of the linkage sleeves drives the spring 42 to contract, and the contraction of the spring 42 drives the positioning rod 47 and the linkage plate 46 to move, and the movement of the positioning rod 47 and the linkage plate 46 drives the insertion rod 45 to move, so that the insertion rod 45 and the positioning rod 47 are separated from the slot body and the opening slot respectively, and then the slide bar 43 and the moving bar 44 are driven into the slot body and the opening slot by the acoustic emission instrument 2. Finally, release the control rod, and the elastic force of the spring 42 drives the insertion rod 45 and the positioning rod 47 to reset, and the insertion rod 45 and the positioning rod 47 are reset to connect with the slide bar 43 and the moving bar 44, thereby realizing the positioning of the acoustic emission instrument 2.

Claims

1. A wind turbine internal bolt fracture monitoring device based on acoustic emission, characterized in that: include: A frame (1), wherein an acoustic emission instrument (2) and a probe (6) are installed inside the frame (1), an electric wire is connected between the acoustic emission instrument (2) and the probe (6), and a handle (5) is fixed on one side of the frame (1); A protective mechanism (3), the protective mechanism (3) is located between the frame (1) and the probe (6) and is used to protect the probe (6), the protective mechanism (3) includes an extrusion component, a ventilation component and a drive component, the extrusion component is located inside the frame (1) and is used to extrude and fix the probe (6), the ventilation components are located on both sides of the extrusion component and are used to ventilate the probe (6) after being extruded and fixed, and the drive component is located inside the frame (1) and is used to drive the extrusion component to move.

2. The device for monitoring bolt fracture inside a wind turbine generator system based on acoustic emission according to claim 1, characterized in that: The extrusion assembly includes a fixed plate (32) fixed inside the frame (1) and a movable plate (31) movably installed inside the frame (1), a rotating plate (33) is hinged on the top of the fixed plate (32), an arc groove for inserting a power line is provided between the rotating plate (33) and the movable plate (31), and a limiting assembly for limiting the movable plate (31) is provided between the rotating plate (33) and the movable plate (31), and an extrusion seat (38) and a fixed seat (37) corresponding to the probe (6) are fixed between the movable plate (31) and the fixed plate (32).

3. The device for monitoring bolt fracture inside a wind turbine generator system based on acoustic emission according to claim 2, characterized in that: The limiting assembly comprises a plurality of evenly distributed limiting rods (39) fixed to one side of the movable plate (31); a plurality of limiting holes are opened on one side of the rotating plate (33); and the plurality of limiting rods (39) correspond to the plurality of limiting holes.

4. The device for monitoring bolt fracture inside a wind turbine generator system based on acoustic emission according to claim 2, characterized in that: The driving assembly includes a fixed groove and a sliding groove opened on the top of the frame (1), a threaded rod (36) is rotatably installed inside the fixed groove, a threaded block (35) is screwed to the outer wall of the threaded rod (36), the threaded block (35) is fixed to the movable plate (31), and two sliders (34) are fixed to the bottom of the movable plate (31), and the two sliders (34) cooperate with the sliding groove.

5. The wind turbine internal bolt fracture monitoring device based on acoustic emission according to claim 1, characterized in that: The ventilation assembly comprises dustproof plates fixed on both sides of the movable plate (31), and the temporal portions of the two dustproof plates are both provided with ventilation holes, and the ventilation holes correspond to the probes (6).

6. The device for monitoring bolt fracture inside a wind turbine generator system based on acoustic emission according to claim 1, characterized in that: A positioning mechanism (4) for positioning the acoustic emission instrument (2) is provided between the frame (1) and the acoustic emission instrument (2). The positioning mechanism (4) includes an open slot and a slot body provided on both sides of the frame (1). A moving bar (44) and a slide bar (43) are fixed on both sides of the acoustic emission instrument (2). The moving bar (44) cooperates with the open slot, and the slide bar (43) cooperates with the slot body. An insertion rod (45) and a positioning rod (47) are respectively inserted into the interior of the slide bar (43) and the moving bar (44). A control component for controlling the insertion rod (45) and the positioning rod (47) is provided on one side of the insertion rod (45) and the positioning rod (47).

7. The device for monitoring bolt fracture inside a wind turbine generator system based on acoustic emission according to claim 6, characterized in that: The control assembly includes a control seat (41) fixed on one side of the frame (1) and two linkage sleeves fixed on one side of the insertion rod (45) and the positioning rod (47), a linkage plate (46) is fixed between the two linkage sleeves, one of the linkage sleeves extends to the inside of the control seat (41) and is fixed with a movable rod, the movable rod extends to one side of the control seat (41) and is fixed with a control rod, a spring (42) is connected between one of the linkage sleeves and the control seat (41), the spring (42) is sleeved on the outer wall of the movable rod, and a groove for the linkage plate (46) to move is provided at the bottom of the control seat (41).

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