Sound sensor

Abstract

The utility model discloses a sound sensor, and relates to the technical field of wind power generation. The sensor comprises a box body which is provided with an opening; a sound sensing assembly, wherein the sound sensing assembly is arranged in the box body; and the protection assembly is arranged at the opening of the box body and is used for carrying out early warning protection on the sound sensing assembly. According to the sound sensor, through linkage design of the flame sensing assembly and the driving motor, when a fire disaster is detected, the driving motor is started, the lead screw is driven to rotate, and the connecting plate is pulled to move, so that the fan-shaped tooth driving gear controls the metal protection plate to quickly close the opening of the box body, and a sealing barrier is formed in cooperation with the magnetic suction device to isolate high temperature and smoke invasion; high-temperature deformation or signal distortion of the sound sensing assembly is avoided, so that the reliability and the service life of the sensor in a complex environment of the wind driven generator are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a sound sensor. Background Technology

[0002] Wind turbines are key equipment for converting wind energy into electrical energy, containing high-speed rotating components such as bearings and gearboxes. During long-term operation, these components are prone to abnormal vibrations or noise due to friction, fatigue, and other factors, potentially leading to mechanical failures or even shutdowns. To monitor equipment status in real time, sound sensors are widely used inside the nacelle. By collecting operational sound wave signals and analyzing changes in their characteristics, wear and potential faults in components can be identified in advance, guiding maintenance personnel to conduct timely repairs and ensuring the stable operation of the power generation system.

[0003] However, the practical application of existing sound sensors in wind turbines has significant limitations. This is because the internal environment of the nacelle is complex, and equipment short circuits or electrical faults may cause local high temperatures or even fires. The housing of traditional sound sensors lacks an adaptive protection mechanism and is prone to deformation or melting at high temperatures, resulting in signal distortion or monitoring interruption, affecting the reliability of fault warnings, and may even lead to damage to internal precision components and loss of monitoring function. Utility Model Content

[0004] In view of this, this application provides a sound sensor, the main purpose of which is to solve the technical problem that the housing of traditional sound sensors lacks an adaptive protection mechanism, is prone to deformation or melting at high temperatures, causing signal distortion or monitoring interruption, affecting the reliability of fault warning, and may even lead to damage to internal precision components and loss of monitoring function.

[0005] This application provides a sound sensor, including:

[0006] The box body has an opening;

[0007] A sound sensing component, wherein the sound sensing component is disposed inside the housing;

[0008] A protective component is provided at the opening of the housing to provide early warning protection for the sound sensing component.

[0009] In one feasible implementation, the protective component includes:

[0010] A flame sensing component is located inside the housing and at a preset distance from the sound sensing component.

[0011] In one feasible implementation, the protective component further includes:

[0012] A protective plate is provided at the opening of the box body and is connected to the box body via a pivot at the end. The protective plate is made of metal.

[0013] The gear is located on the outside of the housing and is coaxial with the rotating shaft.

[0014] In one feasible implementation, the protective component further includes:

[0015] A connecting plate, wherein the connecting plate and the gear are located on the same side of the housing;

[0016] Sector-shaped teeth, which are disposed on the connecting plate and mesh with the gear;

[0017] The mounting bracket is mounted on the connecting plate and is slidably connected to the connecting plate.

[0018] In one feasible implementation, the protective component further includes:

[0019] A connecting strip, one end of which is connected to the mounting bracket;

[0020] A limiting block, one end of which is connected to the other end of the connecting strip, and the other end of the limiting block is provided with a sliding groove;

[0021] A lead screw, which is connected to the slide groove;

[0022] Bearing housing, wherein the bearing housing is located on the outside of the housing, and there are two bearing housings, which are connected to both ends of the lead screw;

[0023] A limiting rod is provided, which is connected to the two bearing seats and is slidably connected to the limiting block.

[0024] In one feasible implementation, the protective component further includes:

[0025] A drive motor is connected to one of the bearing housings and to the flame sensing assembly, for driving the lead screw to rotate.

[0026] In one feasible implementation, the protective component further includes:

[0027] A magnetic suction device is provided at the opening of the box body;

[0028] A magnet, which is located inside the magnetic attraction device.

[0029] In one feasible implementation, the sensor further includes:

[0030] Mounting holes are provided on one side of the housing;

[0031] The mounting slot is formed on the side of the housing opposite to the mounting hole;

[0032] A filter screen, one end of which is connected to the mounting hole and the other end of which is connected to the mounting groove;

[0033] A connector is provided at the connection between the filter screen and the mounting hole. There are two connectors, which are used to connect the filter screen and the mounting hole.

[0034] In one feasible implementation, the connector includes:

[0035] A snap-fit ​​block, wherein the snap-fit ​​block is disposed on the filter screen;

[0036] A pressure plate, wherein the pressure plate has a slot, and the slot is connected to the snap-fit ​​block;

[0037] The mounting rod is connected to the pressure plate and passes through the pressure plate;

[0038] A limiting ring is provided on the mounting rod;

[0039] A spring, one end of which is connected to the limiting ring, and the other end of which is connected to the end of the mounting rod away from the pressure plate.

[0040] In one feasible implementation, the sensor further includes:

[0041] A fixing frame, wherein there are multiple fixing frames, which are located at the edge of the box body;

[0042] A fixing hole is provided on the fixing frame.

[0043] This application provides a sound sensor, including: a housing with an opening; a sound sensing component disposed inside the housing; and a protective component disposed at the opening of the housing for providing early warning protection for the sound sensing component.

[0044] The sound sensor provided in this application uses a linkage design between the flame sensing component and the drive motor. When a fire is detected, the drive motor starts, causing the lead screw to rotate and pull the connecting plate to move. This causes the sector-shaped drive gear to control the metal guard plate to quickly close the housing opening. Together with the magnetic attraction device, a sealing barrier is formed to isolate high temperature and smoke intrusion, preventing the sound sensing component from deforming or distorting due to high temperature. This significantly improves the reliability and service life of the sensor in the complex environment of wind turbine generators.

[0045] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0046] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0047] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0048] Figure 1 A schematic diagram of the structure of a sound sensor provided in an embodiment of this application is shown;

[0049] Figure 2 This is a schematic diagram of the structure of the magnetic attraction device provided in the embodiments of this application;

[0050] Figure 3 This is a schematic diagram of the structure of the protective component provided in the embodiments of this application;

[0051] Figure 4 This is a schematic diagram of the structure of the sound sensing component provided in the embodiments of this application;

[0052] Figure 5 This is a schematic diagram of the structure of the filter provided in an embodiment of this application;

[0053] Figure 6 This is a schematic diagram of the connector provided in an embodiment of this application.

[0054] In the picture:

[0055] 1. Housing; 2. Sound sensor assembly; 3. Mounting hole; 4. Filter screen; 5. Protective plate; 6. Protective assembly; 7. Magnetic suction device; 8. Magnet; 9. Gear; 10. Sector gear; 11. Connecting plate; 12. Mounting bracket; 13. Connecting strip; 14. Drive motor; 15. Bearing seat; 16. Lead screw; 17. Limiting rod; 18. Limiting block; 19. Fixing bracket; 20. Fixing hole; 21. Flame sensor assembly; 22. Mounting groove; 23. Pressure plate; 24. Snap-fit ​​block; 25. Limiting ring; 26. Mounting rod; 27. Spring. Detailed Implementation

[0056] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] Driven by the global energy structure transformation and carbon neutrality goals, wind energy, as one of the core clean and renewable new energy sources, has become a key solution for replacing fossil fuels and mitigating the climate crisis. In recent years, wind power installed capacity has continued to climb. According to the International Energy Agency, in 2022, the global newly installed wind power capacity exceeded 78 GW, accounting for more than 35% of the newly installed renewable energy capacity, highlighting its important position in the energy system. As the core equipment for wind energy conversion, the long-term stable operation of wind turbines directly affects power generation efficiency and grid reliability. However, the internal environment of wind turbines is harsh. High-speed components such as bearings and gearboxes are prone to localized high temperatures or even fires due to friction overheating, lubrication failure, or electrical short circuits under complex operating conditions. This not only threatens equipment safety but also causes onboard monitoring sensors to malfunction due to high-temperature deformation or lack of protection, resulting in interrupted fault warnings and increased operation and maintenance costs and downtime risks. Against this backdrop, improving the adaptive protection capabilities of sensors in extreme scenarios such as high temperature, vibration, and fire is not only a technical requirement for ensuring the efficient operation of wind turbines but also crucial for promoting the large-scale application of new energy and accelerating the global clean energy transition.

[0060] See Figure 1 The diagram shows a structural schematic of a sound sensor provided in an embodiment of this application, including:

[0061] Box 1, with an opening on it;

[0062] Sound sensor component 2 is located inside the housing 1;

[0063] The protective component 6 is located at the opening of the housing 1 and is used to provide early warning protection for the sound sensing component 2.

[0064] In the above embodiment, the opening of the housing 1 is located at the front end in the direction of sound wave reception. The sound sensing component 2 is fixed to the middle of the inner wall of the housing 1 by a bracket, with its sound wave acquisition surface facing the opening. The protective component 6 includes a movable protective plate 5 and a linkage mechanism. The protective plate 5 is hinged to the edge of the opening via a pivot, and normally remains open to allow sound waves to enter without obstruction. In an emergency, it can quickly close and seal the opening. The linkage mechanism runs through the inside and outside of the housing 1, transmitting the power of the drive unit to the pivot of the protective plate 5.

[0065] This application ensures the monitoring sensitivity of the sound sensing component 2 under normal conditions by directional sound wave acquisition through an opening. The opening and closing design of the protective plate 5 takes into account both daily monitoring and emergency protection needs: when open, it maximizes sound wave reception efficiency, and when closed, it forms a physical isolation barrier to prevent the intrusion of external high temperatures and smoke. The cross-box layout of the linkage mechanism enables the transmission of power between the inside and outside, avoids the impact of protective actions on the heat conduction of internal components, simplifies the complexity of the mechanical structure, and improves overall reliability.

[0066] See Figure 4 This is a schematic diagram of the structure of the sound sensing component provided in the embodiments of this application. Further, the protective component 6 includes:

[0067] Flame sensing component 21 is located inside the housing 1 at a preset distance from sound sensing component 2.

[0068] In the above embodiment, the protective component 6 achieves spatial isolation between the flame sensing component 21 and the sound sensing component 2 within the enclosure 1 by setting a preset distance between them. The flame sensing component 21 is independently arranged on the side wall of the enclosure 1, with its detection direction facing the outside of the opening of the enclosure 1, enabling real-time monitoring of the external ambient temperature and flame signal. The sound sensing component 2 is fixed to the inner side wall of the enclosure 1, with its sound wave receiving surface facing the opening direction, avoiding signal acquisition interference with the flame sensing component 21.

[0069] By arranging the sensing units in different zones, the flame detection and sound monitoring functions are designed to operate independently without interference. This ensures the accuracy of sound signal acquisition while allowing the flame sensing component 21 to independently trigger the protection mechanism. The preset interval design prevents the flame sensing component 21 from mistakenly triggering temperature rise signals generated by thermal elements such as motors or circuit boards, improving the reliability of fire assessment and ensuring that protective actions are only activated under actual fire conditions.

[0070] See Figure 3 This is a schematic diagram of the structure of the protective component provided in the embodiment of this application. Further, the protective component 6 also includes:

[0071] The protective plate 5 is located at the opening of the box 1 and is connected to the box 1 through a pivot at the end. The protective plate 5 is made of metal.

[0072] Gear 9 is located on the outside of housing 1 and is coaxial with the rotating shaft.

[0073] In the above embodiment, the guard plate 5 is hinged to the edge of the opening of the housing 1 via a pivot. Its main body is made of metal plate, and its edge matches the outline of the opening of the housing 1. The gear 9 is coaxially fixed to the end of the guard plate 5 where the pivot extends to the outside of the housing 1, and rotates synchronously with the pivot. The outside of the housing 1 is provided with a mounting groove for the gear 9, and the exposed part of the gear 9 meshes with the subsequent transmission components to ensure the stability of power transmission.

[0074] The metal protective plate 5 exhibits excellent resistance to deformation at high temperatures, effectively preventing external flames and high-temperature airflow from directly impacting the interior of the housing 1. The rigid connection design between the rotating shaft and the gear 9 ensures high mechanical strength during the opening and closing of the protective plate 5, preventing protection failure due to external impacts. The external placement of the gear 9 facilitates integration with the transmission mechanism while reducing the internal space occupied by the housing 1, thus optimizing the overall compactness of the sensor structure.

[0075] Furthermore, protective component 6 also includes:

[0076] Connecting plate 11, the connecting plate 11 and the gear 9 are located on the same side of the housing 1;

[0077] Sector teeth 10 are provided on the connecting plate 11 and mesh with gear 9;

[0078] Mounting bracket 12 is mounted on connecting plate 11 and is slidably connected to connecting plate 11.

[0079] In the above embodiment, the connecting plate 11 is rotatably mounted on the outer wall of the housing 1 via bearings, and its rotation axis is parallel to the axis of the gear 9. The sector tooth 10 is fixed to one side of the connecting plate 11, and its toothed area precisely meshes with the outer teeth of the gear 9, with the meshing length covering the swing stroke of the connecting plate 11. The mounting bracket 12 is slidably connected to the connecting plate 11 via a slide rail, and its sliding direction is parallel to the length direction of the connecting plate 11 and perpendicular to the swing plane of the sector tooth 10.

[0080] The meshing transmission between the sector teeth 10 and the gear 9 converts the oscillation of the connecting plate 11 into the precise rotation of the gear 9, thereby controlling the opening and closing angle of the guard plate 5. The sliding connection design of the mounting bracket 12 enables the transmission mechanism to have self-adjusting capability, which can compensate for the backlash of the gear 9 caused by machining or assembly errors, ensuring continuous and stable power transmission. In addition, the sliding connection reduces the risk of wear on transmission components due to vibration, extending the service life of the protective component 6.

[0081] Furthermore, protective component 6 also includes:

[0082] Connecting strip 13, one end of which is connected to mounting bracket 12;

[0083] Limiting block 18, one end of which is connected to the other end of connecting strip 13, and the other end of limiting block 18 is provided with a sliding groove;

[0084] Lead screw 16, lead screw 16 is connected to the slide groove;

[0085] Bearing seat 15, the bearing seat 15 is located on the outside of the housing 1, there are two bearing seats 15, and they are connected to both ends of the lead screw 16.

[0086] Limiting rod 17 is connected to two bearing seats 15 and is slidably connected to limiting block 18.

[0087] In the above embodiment, one end of the connecting strip 13 is connected to the mounting bracket 12 via a hinge, and the other end is rigidly fixed to the limiting block 18. A through groove is formed in the middle of the limiting block 18, and the inner wall of the groove matches the external thread of the lead screw 16, allowing the limiting block 18 to move axially along the lead screw 16. The lead screw 16 is supported at both ends by bearing seats 15, and its axis is parallel to the side wall of the housing 1. A limiting rod 17 is fixed between the two bearing seats 15, and its rod body passes through a guide hole in the side wall of the limiting block 18, restricting the limiting block 18 to move only axially along the lead screw 16.

[0088] The threaded engagement between the lead screw 16 and the limiting block 18 converts rotational motion into linear motion, driving the connecting bar 13 to pull the mounting bracket 12 to move. This, in turn, controls the closing of the guard plate 5 through the linkage of the sector teeth 10 and the gear 9. The guiding function of the limiting rod 17 eliminates the radial offset problem commonly found in the lead screw 16 transmission, ensuring precise movement of the limiting block 18, preventing jamming, achieving rapid response of the protective action, and exhibiting high transmission efficiency, making it suitable for quickly closing the guard plate 5 in emergency fire situations.

[0089] Furthermore, protective component 6 also includes:

[0090] A drive motor 14 is connected to a bearing housing 15 and a flame sensing assembly 21, and is used to drive the lead screw 16 to rotate.

[0091] In the above embodiment, the drive motor 14 is fixed to a bearing housing 15 on one side via a flange, and its output shaft is directly connected to the end of the lead screw 16 via a coupling. The control circuit of the drive motor 14 is connected to the signal output terminal of the flame sensing component 21. When the flame sensing component 21 detects a fire, the drive motor 14 immediately starts and outputs a preset torque. The speed of the drive motor 14 is adjusted in stages according to the severity of the fire to ensure that the closing speed of the guard plate 5 matches the risk level.

[0092] The direct signal linkage between the drive motor 14 and the flame sensing component 21 achieves seamless integration of fire detection and mechanical protection, significantly shortening emergency response time. The tiered speed control prevents the protective plate 5 from malfunctioning under slight temperature rises, while ensuring full-speed closure in severe fire conditions, balancing protective reliability and equipment lifespan. The external mounting of the drive motor 14 facilitates heat dissipation and maintenance, while also reducing its impact on the temperature rise inside the enclosure 1.

[0093] See Figure 2 This is a schematic diagram of the magnetic attraction device provided in the embodiments of this application. Furthermore, the protective component 6 also includes:

[0094] Magnetic suction device 7 is located at the opening of the box 1;

[0095] Magnet 8 is located inside the magnetic attraction device 7.

[0096] In the above embodiment, the magnetic attraction device 7 is a frame fixed to the edge of the opening of the housing 1, with a magnet 8 embedded inside. The magnet 8 corresponds to the closed position of the protective plate 5. When the protective plate 5 is rotated to the closed state, its metal edge strongly attracts the magnet 8. The contact surface between the magnetic attraction device 7 and the protective plate 5 is provided with a high-temperature resistant insulating layer to prevent current conduction or high-temperature demagnetization.

[0097] The magnetic attraction device 7 enhances the sealing of the protective plate 5 when closed, preventing high-temperature smoke from seeping into the housing 1 through gaps. The magnetic attraction force can adaptively compensate for slight deformation of the protective plate 5 due to thermal expansion and contraction, ensuring that it remains tightly closed even after long-term use. The insulation layer design avoids electrostatic interference with the sensor circuit and protects the magnet 8 from demagnetization at high temperatures, maintaining its long-lasting attraction performance.

[0098] See Figure 5 This is a schematic diagram of the filter structure provided in an embodiment of this application. Furthermore, the sensor also includes:

[0099] Mounting hole 3 is located on one side of housing 1;

[0100] Mounting slot 22 is provided on the side of housing 1 opposite to mounting hole 3;

[0101] Filter screen 4, one end of which is connected to mounting hole 3 and the other end is connected to mounting groove 22;

[0102] Two connectors are provided at the connection between the filter screen 4 and the mounting hole 3. They are used to connect the filter screen 4 and the mounting hole 3.

[0103] In the above embodiment, mounting holes 3 and mounting grooves 22 are symmetrically formed on the upper and lower side walls of the housing 1, and their diameters are slightly larger than the thickness of the filter screen 4 frame. The filter screen 4 adopts a composite layer structure of metal mesh and activated carbon, and its frame has flanges at both ends, which are inserted into the mounting holes 3 and mounting grooves 22 respectively. The connector includes elastic buckles and locking mechanisms to fix the filter screen 4 to the outside of the opening of the housing 1.

[0104] The composite filter 4 can simultaneously block large dust particles and adsorb harmful gases, preventing contaminants from clogging the sound wave receiving surface of the sound sensing component 2. The insertion design of the flange with the mounting hole 3 and mounting groove 22 simplifies the disassembly and assembly process of the filter 4, making it easy to replace or clean it regularly. The elastic buckle provides sufficient fixing force and can also buffer the impact of vibration on the filter 4, preventing the filter 4 from falling off or shifting due to long-term vibration.

[0105] See Figure 6 This is a schematic diagram of the structure of the connector provided in an embodiment of this application. Further, the connector includes:

[0106] Clip-on block 24 is located on filter screen 4;

[0107] Pressure plate 23, pressure plate 23 has a slot, the slot is connected to the snap block 24;

[0108] Mounting rod 26 is connected to pressure plate 23 and passes through pressure plate 23;

[0109] Limiting ring 25 is provided on mounting rod 26;

[0110] Spring 27, one end of spring 27 is connected to limit ring 25, and the other end of spring 27 is connected to the end of mounting rod 26 away from pressure plate 23.

[0111] In the above embodiment, the snap-fit ​​block 24 is a square protrusion on the frame of the filter screen 4, and its diameter is interference-fitted with the inner diameter of the slot of the pressure plate 23. The pressure plate 23 is hinged to the outer wall of the housing 1 by the mounting rod 26, and the opening direction of its slot is perpendicular to the insertion direction of the filter screen 4. The limiting ring 25 is sleeved in the middle of the mounting rod 26, and the two ends of the spring 27 abut against the limiting ring 25 and the mounting rod 26 respectively, providing a continuous pressing force of the pressure plate 23 toward the filter screen 4. When the operator moves the pressure plate 23 upward, it causes the limiting ring 25 to move upward, which in turn compresses the spring 27. The upward movement of the pressure plate 23 will also separate it from the snap-fit ​​block 24. Without the restriction of the snap-fit ​​block 24, the operator can rotate the pressure plate 23 around the limiting ring 25 to the other side. Then, the operator moves the filter screen 4 upward to move the filter screen 4 to the outside of the housing 1 to clean the dust on it. After cleaning, the operator resets the filter screen 4 so that the filter screen 4 can continue to filter dust, thus achieving the cleaning effect of the filter screen 4.

[0112] The interference fit snap-fit ​​structure ensures that the filter 4 does not wobble after installation, avoiding noise interference from vibration that could affect sound signal acquisition. The elasticity of the spring 27 allows the pressure plate 23 to adapt to the thickness of the filter 4, ensuring reliable fixation for different batches of filters 4. The hinged pressure plate 23 can be quickly flipped to detach from the filter 4, significantly improving maintenance efficiency and making it particularly suitable for maintenance needs in high-altitude or confined cabin environments.

[0113] Furthermore, the sensors also include:

[0114] Multiple fixing brackets 19 are provided at the edge of the housing 1.

[0115] Fixing hole 20 is provided on fixing bracket 19.

[0116] In the above embodiment, the mounting bracket 19 is an L-shaped sheet metal part, with its vertical side welded to the edge of the side wall of the housing 1 and its horizontal side extending to the outside of the housing 1. The mounting holes 20 penetrate through the horizontal side of the mounting bracket 19, and the hole positions are matched with the standard mounting brackets inside the wind turbine nacelle. Multiple mounting brackets 19 are evenly arranged around the circumference of the housing 1 to form a multi-point distributed support structure.

[0117] The distributed mounting bracket 19 design evenly distributes the sensor weight across the mounting surface, preventing localized stress concentration that could lead to deformation of the housing 1. The L-shaped structure enhances the bending stiffness of the bracket 19, effectively suppressing damage to the internal components of the sensor caused by high-frequency vibrations in the nacelle. The compatibility of the mounting holes 20 with standard brackets simplifies the installation process, eliminating the need for additional machining of adapters, reducing deployment costs, and improving installation efficiency.

[0118] The working principle of this application is as follows: The housing 1 can be fixed in a suitable position by inserting bolts into the fixing holes 20 on the fixing bracket 19; under normal conditions, the sound sensing component 2 inside the housing 1 can receive sound waves from the wind turbine nacelle. When a fire occurs inside the wind turbine nacelle, the flame sensing component 21 detects the flame first. At this time, the mounting bracket 12 moves outward along the connecting plate 11 under drive. The outward movement of the mounting bracket 12 along the connecting plate 11 drives the sector gear 10 to rotate upward, which in turn drives the gear 9 to rotate. Rotating the protective plate 5 upwards will close the opening of the housing 1, thus isolating the flame and preventing the flame in the wind turbine nacelle from burning the sound sensor component 2. When the protective plate 5 is rotated 90 degrees to close the opening of the housing 1, the protective plate 5 will come into contact with the magnet 8, and the magnet 8 can attract the protective plate 5. By moving the pressure plate 23 upwards, the limiting ring 25 moves on the mounting rod 26, which at the same time compresses the spring 27. The upward movement of the pressure plate 23 will also separate it from the locking block 24. Then, by rotating the pressure plate 23 around the mounting rod 26, the filter screen 4 can be removed from the housing 1.

[0119] This application provides a schematic diagram of the structure of a sound sensor, including: a housing 1 with an opening; a sound sensing component 2 disposed inside the housing 1; and a protective component 6 disposed at the opening of the housing 1 for providing early warning protection for the sound sensing component 2.

[0120] The sound sensor provided in this application uses a linkage design between the flame sensing component and the drive motor. When a fire is detected, the drive motor starts, causing the lead screw to rotate and pull the connecting plate to move. This causes the sector-shaped drive gear to control the metal guard plate to quickly close the housing opening. Together with the magnetic attraction device, a sealing barrier is formed to isolate high temperature and smoke intrusion, preventing the sound sensing component from deforming or distorting due to high temperature. This significantly improves the reliability and service life of the sensor in the complex environment of wind turbine generators.

[0121] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0122] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A sound sensor, characterized in that, include: Box (1), the box (1) is provided with an opening; A sound sensing component (2) is disposed inside the housing (1); The protective component (6) is located at the opening of the housing (1) and is used to provide early warning protection for the sound sensing component (2).

2. The sensor according to claim 1, characterized in that, The protective component (6) includes: Flame sensing component (21) is located inside the housing (1) at a preset distance from the sound sensing component (2).

3. The sensor according to claim 2, characterized in that, The protective component (6) also includes: The protective plate (5) is located at the opening of the box (1) and is connected to the box (1) through a pivot at the end. The protective plate (5) is made of metal. Gear (9), the gear (9) is located on the outside of the housing (1), and the gear (9) is coaxially arranged with the rotating shaft.

4. The sensor according to claim 3, characterized in that, The protective component (6) also includes: A connecting plate (11) is provided on the same side of the housing (1) as the gear (9); A sector tooth (10) is provided on the connecting plate (11) and meshes with the gear (9); Mounting bracket (12) is mounted on the connecting plate (11) and is slidably connected to the connecting plate (11).

5. The sensor according to claim 4, characterized in that, The protective component (6) also includes: A connecting strip (13), one end of which is connected to the mounting bracket (12); A limiting block (18) is provided, one end of which is connected to the other end of the connecting strip (13), and the other end of the limiting block (18) is provided with a sliding groove. A lead screw (16) is connected to the slide groove; Bearing seat (15), the bearing seat (15) is located on the outside of the housing (1), there are two bearing seats (15), and they are connected to both ends of the lead screw (16); The limiting rod (17) is connected to the two bearing seats (15) and is slidably connected to the limiting block (18).

6. The sensor according to claim 5, characterized in that, The protective component (6) also includes: A drive motor (14) is connected to a bearing housing (15) and is connected to the flame sensing assembly (21) for driving the lead screw (16) to rotate.

7. The sensor according to claim 1, characterized in that, The protective component (6) also includes: A magnetic suction device (7) is provided at the opening of the box (1); Magnet (8), which is located inside the magnetic attraction device (7).

8. The sensor according to claim 1, characterized in that, The sensor also includes: Mounting hole (3), the mounting hole (3) is opened on one side of the housing (1); Mounting slot (22), the mounting slot (22) is opened on the side of the housing (1) opposite to the mounting hole (3); A filter screen (4), one end of which is connected to the mounting hole (3) and the other end of which is connected to the mounting groove (22); A connector is provided at the connection between the filter screen (4) and the mounting hole (3). There are two connectors, which are used to connect the filter screen (4) and the mounting hole (3).

9. The sensor according to claim 8, characterized in that, The connector includes: A snap-fit ​​block (24) is provided on the filter screen (4); The pressure plate (23) has a slot, which is connected to the snap-fit ​​block (24); Mounting rod (26), which is connected to pressure plate (23) and passes through pressure plate (23); A limiting ring (25) is provided on the mounting rod (26); A spring (27) is provided, one end of which is connected to the limiting ring (25), and the other end of which is connected to the end of the mounting rod (26) away from the pressure plate (23).

10. The sensor according to claim 1, characterized in that, The sensor also includes: Fixing brackets (19), there are multiple fixing brackets (19), which are located at the edge of the box (1); Fixing hole (20) is formed on the fixing frame (19).

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