Low-resistance noise reduction filter air baffle

Abstract

The utility model relates to the technical field of wind power cabin ventilation and noise reduction, and particularly relates to a low-resistance noise reduction filtering air inlet louver; the design realizes efficient noise absorption in limited space through the top noise reduction louver, the bottom noise reduction louver and the middle group composed of the first noise reduction louver and the second noise reduction louver fixedly connected, in cooperation with the sound-absorbing cotton arranged between the components; meanwhile, the cooperation of the filter cotton arranged on one end surface of the frame and the plurality of internal fixed supports not only ensures the compactness of the structure, but also optimizes the airflow path, reduces the ventilation resistance, improves the air intake volume, effectively prevents the cabin temperature rise over-temperature alarm, and ensures the normal operation of the wind power equipment; in addition, the fixing piece composed of the R-shaped pin, the M8 butterfly nut and the large gasket between the press plate net and the outer side and the frame further enhances the stability of the device and the convenience of modular installation.

Description

Technical Field

[0001] This utility model relates to the field of ventilation and noise reduction technology for wind turbine nacelles, and in particular to a low-resistance noise-reducing and filtering air inlet louver. Background Technology

[0002] Noise-reducing louver technology has been widely used and achieved good results in industrial and shopping mall settings. Through reasonable design, the noise-reducing louver structure can effectively absorb and reflect sound waves, reducing the impact of noise on the surrounding environment and people. For example, in the ventilation systems of some large shopping malls, the noise level inside the mall has been significantly reduced after the adoption of noise-reducing louvers, creating a quieter and more comfortable environment for customers and staff. At the same time, ventilation filtration technology is also constantly developing. Filtration devices can effectively intercept dust and other impurities in the air, ensuring the cleanliness of the air entering the equipment, reducing equipment failures caused by dust pollution, extending the service life of the equipment, and improving the operating efficiency of the equipment.

[0003] However, due to space constraints in the wind power industry, product sizes need to be as small and thin as possible. However, thin products result in shorter noise reduction components, which seriously affects the final noise reduction effect. In addition, adding noise reduction louvers to the air inlet and outlet will block a large area of ​​air inlet and outlet, causing the nacelle temperature to rise and trigger an over-temperature alarm, affecting normal power generation operation. Utility Model Content

[0004] The purpose of this invention is to provide a low-resistance noise-reducing filter air inlet louver, which aims to solve the technical problems in the existing technology where the wind power industry is limited by space and the product size needs to be as small and thin as possible. However, the thinness of the product will make the noise reduction component shorter, which will seriously affect the final noise reduction effect. In addition, adding noise-reducing louvers to the air inlet and outlet will block a large air inlet and outlet area, leading to the nacelle temperature rise and over-temperature alarm, which will affect the normal power generation operation.

[0005] To achieve the above objectives, this utility model employs a low-resistance noise-reducing filter air inlet louver, comprising a top noise-reducing louver, a bottom noise-reducing louver, multiple intermediate groups, and a frame. Each intermediate group includes a first noise-reducing louver and a second noise-reducing louver, with the first and second noise-reducing louvers fixedly connected. Sound-absorbing cotton is provided at the top noise-reducing louver, the bottom noise-reducing louver, and each intermediate group. Filter cotton is provided at one end face of the frame. Multiple fixed supports are provided within the frame. The top noise-reducing louver is positioned between the multiple fixed supports, the bottom noise-reducing louver is positioned between the multiple fixed supports, and the multiple intermediate groups are positioned between the multiple fixed supports and also between the top and bottom noise-reducing louvers.

[0006] The top noise-reducing louver and the uppermost middle group form a top air inlet hole, the middle groups form a middle air inlet hole, and the bottom noise-reducing louver and the lowermost middle group form a bottom air inlet hole. Each of the top air inlet hole, the middle air inlet hole, and the bottom air inlet hole has a first air inlet section, a second air inlet section, and a third air inlet section. The first air inlet section and the second air inlet section are inclined, the second air inlet section and the third air inlet section have a chamfer, and the third air inlet section is positioned towards the end face of the filter cotton. The third air inlet section is positioned at a 90±15° angle to the filter cotton.

[0007] The first noise-reducing louver and the second noise-reducing louver are fixedly connected by bolts, and the first noise-reducing louver is located above the second noise-reducing louver.

[0008] The low-resistance noise-reducing filter air inlet louver also includes a pressure plate mesh, which covers one end face of the frame and also covers the filter cotton.

[0009] The outer side of the pressure plate mesh is provided with multiple fasteners between the outer side of the frame and the outer side of the frame. Each fastener consists of an R-type pin, an M8 wing nut and a large washer.

[0010] This utility model discloses a low-resistance noise-reducing filter air inlet louver. The design utilizes a top noise-reducing louver, a bottom noise-reducing louver, and multiple intermediate groups consisting of first and second noise-reducing louvers fixedly connected together. Combined with sound-absorbing cotton placed between the components, this achieves efficient noise absorption within a limited space. Simultaneously, the filter cotton on one end of the frame, in conjunction with multiple internal fixed supports, not only ensures structural compactness but also optimizes airflow path through the design of the top, middle, and bottom air inlets, reducing ventilation resistance, increasing airflow volume, and effectively preventing overheating alarms in the nacelle, thus ensuring the normal operation of the wind power equipment. Furthermore, the pressure plate mesh and its outer side are fixed to the frame using R-type pins, M8 wing nuts, and large washers, further enhancing the stability of the device and the convenience of modular installation. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1This is a three-dimensional view of the low-resistance noise-reducing filter air inlet louver of this utility model.

[0013] Figure 2 This is a front view of the low-resistance noise-reducing filter air inlet louver of this utility model.

[0014] Figure 3 This is the utility model Figure 2 A cross-sectional view along line AA in the middle.

[0015] Figure 4 This is the utility model Figure 3 A cross-sectional view along the BB line.

[0016] Figure 5 This is the utility model Figure 4 A magnified view of a section at point C.

[0017] Figure 6 This is a front view of the first, second, and third air inlet sections of the low-resistance noise-reducing filter air inlet louver of this utility model.

[0018] 1-Top noise-reducing louvers, 2-Bottom noise-reducing louvers, 3-Frame, 4-First noise-reducing louvers, 5-Second noise-reducing louvers, 6-Sound-absorbing cotton, 7-Filter cotton, 8-Fixing bracket, 9-Top air inlet hole, 10-Middle air inlet hole, 11-Bottom air inlet hole, 12-Pressure plate mesh, 13-R-pin, 14-M8 wing nut, 15-Large washer, 16-First air inlet section, 17-Second air inlet section, 18-Third air inlet section, 19-Chamfer. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] Please see Figures 1 to 6This utility model provides a low-resistance noise-reducing and filtering air inlet louver, including a top noise-reducing louver 1, a bottom noise-reducing louver 2, multiple intermediate groups, and a frame 3. Each intermediate group includes a first noise-reducing louver 4 and a second noise-reducing louver 5, and the first noise-reducing louver 4 and the second noise-reducing louver 5 are fixedly connected. Sound-absorbing cotton 6 is provided at the top noise-reducing louver 1, the bottom noise-reducing louver 2, and each intermediate group. Filter cotton 7 is provided at one end face of the frame 3. Multiple fixed supports 8 are provided inside the frame 3. The top noise-reducing louver 1 is disposed between the multiple fixed supports 8, the bottom noise-reducing louver 2 is disposed between the multiple fixed supports 8, and the multiple intermediate groups are disposed between the multiple fixed supports 8, and are also located between the top noise-reducing louver 1 and the bottom noise-reducing louver 2.

[0021] In this embodiment, by using the top noise-reducing louvers 1, the bottom noise-reducing louvers 2, and a plurality of intermediate groups composed of the first noise-reducing louvers 4 and the second noise-reducing louvers 5, and by setting sound-absorbing cotton 6 between each component, efficient noise reduction is achieved in a limited space. At the same time, the filter cotton 7 set on one end face of the frame 3, in cooperation with the multiple internal fixed supports 8, not only ensures the compactness of the structure, but also reduces ventilation resistance and increases the intake air volume by optimizing the airflow path, effectively solving the problems of poor noise reduction effect and nacelle temperature rise caused by space constraints in the wind power industry.

[0022] Furthermore, a top air inlet 9 is formed between the top noise-reducing louver 1 and the uppermost middle group, a middle air inlet 10 is formed between the multiple middle groups, and a bottom air inlet 11 is formed between the bottom noise-reducing louver 2 and the lowermost middle group. Each of the top air inlet 9, the middle air inlet 10, and the bottom air inlet 11 has a first air inlet section 16, a second air inlet section 17, and a third air inlet section 18. The first air inlet section 16 and the second air inlet section 17 are inclined, and there is a chamfer 19 between the second air inlet section 17 and the third air inlet section 18. The third air inlet section 18 is positioned towards the end face of the filter cotton 7, and the third air inlet section 18 is positioned at 90±15° with the filter cotton 7.

[0023] In this embodiment, by setting multiple air inlet holes, a uniform air intake volume can be maintained. At the same time, the air enters at an angle from the first air inlet section 16 and the second air inlet section 17, and after passing through the chamfer 19, it is blown out at 90±15° towards the third air inlet section 18 and the filter cotton, ensuring that the airflow is blown out laterally. Furthermore, the opening of the first air inlet section 16 is larger than the opening of the third air inlet section 18. This variable diameter design can reduce wind resistance and enhance the sound absorption effect of the channel. This design reduces the resistance when the airflow passes through, making the air intake smoother. It effectively prevents the overheating alarm phenomenon of the nacelle caused by the addition of noise reduction components at the air inlet and outlet, thereby ensuring that the wind power equipment can maintain a stable operating state while efficiently reducing noise, and improving the overall power generation efficiency.

[0024] Furthermore, the first noise-reducing louver 4 and the second noise-reducing louver 5 are fixedly connected by bolts, and the first noise-reducing louver 4 is located above the second noise-reducing louver 5.

[0025] In this embodiment, this connection method not only facilitates installation and maintenance, but also ensures that the louver structure will not loosen or deform due to vibration or wind during long-term use, thereby maintaining a continuous noise reduction effect and providing a stable and reliable operating environment for wind power equipment.

[0026] Furthermore, the low-resistance noise-reducing filter air inlet louver also includes a pressure plate mesh 12, which covers one end face of the frame 3 and also covers the filter cotton 7.

[0027] In this embodiment, by covering one end face of the frame 3 and the filter cotton 7 with the pressure plate mesh 12, the filter cotton 7 is effectively prevented from falling off or shifting due to airflow impact, while protecting the filter cotton 7 from the influence of external environmental factors and extending its service life.

[0028] Furthermore, a plurality of fasteners are provided between the outer side of the pressure plate mesh 12 and the outer side of the frame 3, each fastener consisting of an R-type pin 13, an M8 wing nut 14 and a large washer 15.

[0029] In this embodiment, this design not only enhances the connection stability between the pressure plate mesh 12 and the frame 3, but also improves the modular installation convenience of the entire louver structure.

[0030] In this invention, the top noise-reducing louvers 1, the bottom noise-reducing louvers 2, and multiple intermediate groups consisting of the first noise-reducing louvers 4 and the second noise-reducing louvers 5 connected by bolts are sequentially installed between multiple fixed brackets 8 within the frame 3, ensuring a tight fit between the components and effective filling of the sound-absorbing cotton 6. Subsequently, the filter cotton 7 is laid on one end face of the frame 3 and covered with the pressure plate mesh 12. The pressure plate mesh 12 is securely fixed to the frame 3 using fasteners consisting of R-type pins 13, M8 wing nuts 14, and large washers 15, forming a complete air intake filtration and noise reduction system. Finally, through its unique flow channel design, the device allows cold air to smoothly enter from the top air intake hole 9, the middle air intake hole 10, and the bottom air intake hole 11 while the cooling equipment in the nacelle blows out hot air, effectively reducing the temperature rise of the nacelle. At the same time, the sound-absorbing louver structure absorbs and weakens noise in different frequency bands, ensuring stable operation of the wind power equipment in a highly efficient and quiet environment.

[0031] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A low-resistance noise-reducing and filtering air inlet louver, characterized in that, The device includes a top noise-reducing louver, a bottom noise-reducing louver, multiple intermediate groups, and a frame. Each intermediate group includes a first noise-reducing louver and a second noise-reducing louver, with the first and second noise-reducing louvers fixedly connected. Sound-absorbing cotton is provided at the top noise-reducing louver, the bottom noise-reducing louver, and each intermediate group. Filter cotton is provided at one end of the frame. Multiple fixed supports are provided inside the frame. The top noise-reducing louver is disposed between the multiple fixed supports, the bottom noise-reducing louver is disposed between the multiple fixed supports, and the multiple intermediate groups are disposed between the multiple fixed supports and also located between the top and bottom noise-reducing louvers.

2. The low-resistance noise-reducing and filtering air inlet louver as described in claim 1, characterized in that, A top air inlet is formed between the top noise-reducing louver and the uppermost middle group, a middle air inlet is formed between the middle groups, and a bottom air inlet is formed between the bottom noise-reducing louver and the lowermost middle group. Each of the top, middle, and bottom air inlets has a first air inlet section, a second air inlet section, and a third air inlet section. The first and second air inlet sections are inclined, and the second and third air inlet sections have a chamfer. The third air inlet section is positioned towards the end face of the filter cotton, and the third air inlet section is positioned at a 90±15° angle to the filter cotton.

3. The low-resistance noise-reducing filter air inlet louver as described in claim 2, characterized in that, The first noise-reducing louver and the second noise-reducing louver are fixedly connected by bolts, and the first noise-reducing louver is located above the second noise-reducing louver.

4. The low-resistance noise-reducing filter air inlet louver as described in claim 3, characterized in that, The low-resistance noise-reducing filter air inlet louver also includes a pressure plate mesh, which covers one end face of the frame and also covers the filter cotton.

5. The low-resistance noise-reducing filter air inlet louver as described in claim 4, characterized in that, Multiple fasteners are provided between the outer side of the pressure plate mesh and the outer side of the frame. Each fastener consists of an R-type pin, an M8 wing nut, and a large washer.

Images