Compressor intake silencer

Abstract

The utility model discloses a kind of compressor intake sound attenuation device, it is related to compressor testing technical field, including sound attenuation box, the side of its sound attenuation box is provided with air inlet, the side of sound attenuation box opposite with air inlet is provided with adapter pipe, the flange disc is set to the air outlet end of adapter pipe, sound attenuation mechanism is set in sound attenuation box, the bottom of sound attenuation box is provided with adjusting tooling.The utility model is through the initial noise reduction of filter cover, the sound wave scattering attenuation of multistage cavity and honeycomb metal pipe, the energy absorption of high-density glass fiber sound-absorbing cotton and the firm installation of adjustable tooling, realize the broadband efficient weakening of compressor intake noise and guarantee device adaptability.

Description

Technical Field

[0001] This utility model relates to the field of compressor testing technology, specifically a compressor intake silencer. Background Technology

[0002] During compressor testing, although the equipment was protected by an external soundproof enclosure, the noise level inside the enclosure met the relevant requirements. However, at the air inlet, the high-speed rotation of the impeller generated significant noise. Currently, the conventional approach is to install another soundproof enclosure at the air inlet, but this method has several drawbacks. Firstly, a single soundproof enclosure is insufficient to effectively reduce inlet noise. Secondly, assembling large soundproof enclosures is not only extremely labor-intensive, but also requires specific enclosures for different models due to structural differences, making the assembly process difficult, costly, and inefficient, thus failing to meet the diverse needs of actual production. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a compressor intake silencer, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A compressor intake silencer includes a silencer box.

[0006] The most significant design difference of this utility model is that: an air inlet is provided on one side of the silencer box, a connecting pipe is provided on the side of the silencer box opposite to the air inlet, a flange is provided at the air outlet end of the connecting pipe, a silencing mechanism is provided inside the silencer box, and an adjustment fixture is provided at the bottom of the silencer box.

[0007] To achieve air noise reduction, the noise reduction mechanism includes three fixed plates, namely, a first fixed plate, a second fixed plate, and a third fixed plate, all disposed inside the noise reduction box. The first fixed plate, the second fixed plate, and the third fixed plate divide the interior of the noise reduction box into cavities one, two, three, and four. Metal tubes one, two, and three are respectively disposed inside the noise reduction box. One end of metal tube one is connected to the air inlet, and the other end of metal tube one passes through the first fixed plate and the second fixed plate in sequence. Metal tube two is located inside cavity two, and both ends of metal tube two pass through the first fixed plate and the second fixed plate, respectively. Both ends of metal tube three pass through the first fixed plate, the second fixed plate, and the third fixed plate, respectively. The end of metal tube one located inside cavity two has a honeycomb structure.

[0008] To adjust the height of the muffler box, the adjustment fixture includes L-shaped plates located at the four opposite corners of the muffler box. A fixing block is fixedly installed on one side of each of the four L-shaped plates, and a support plate can be detachably installed on both ends of the L-shaped plates. Adjustment holes are evenly opened on the support plates, and bolts are installed in two of the adjustment holes. The bolts pass through the adjustment holes and are threaded into the fixing blocks.

[0009] To enhance the noise reduction effect, sound-absorbing cotton is installed inside the metal pipe 1, metal pipe 2, metal pipe 3 and the adapter pipe, and the sound-absorbing cotton is made of high-density glass fiber.

[0010] To intercept impurities in the air, a filter cover is threaded onto the outer surface of the air inlet.

[0011] Compared with the prior art, this utility model has the following advantages: through the initial noise reduction of the filter cover, the sound wave scattering attenuation of the multi-stage cavity and honeycomb metal tube, the energy absorption of the high-density glass fiber sound-absorbing cotton, and the stable installation of the adjustable tooling, it can achieve wide-band and efficient reduction of compressor intake noise and ensure the adaptability of the device. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present utility model;

[0013] Figure 2 This is a sectional view of the main view of this utility model;

[0014] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention;

[0015] Figure 4 This is a perspective view of the adjusting tool of this utility model.

[0016] Attached reference numerals: 1. Silencer box; 2. Air inlet; 3. Adapter pipe; 4. Flange; 5. Fixing plate one; 6. Fixing plate two; 7. Fixing plate three; 8. Cavity one; 9. Cavity two; 10. Cavity three; 11. Cavity four; 12. Metal pipe one; 13. Metal pipe two; 14. Metal pipe three; 15. L-shaped plate; 16. Fixing block; 17. Support plate; 18. Adjustment hole; 19. Bolt; 20. Sound-absorbing cotton; 21. Filter cover. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] like Figure 1 As shown, this utility model provides a compressor intake silencing device, including a silencing box 1.

[0019] like Figure 2-4As shown, the most significant design difference of this utility model is that: an air inlet 2 is provided on one side of the silencer box 1, an adapter pipe 3 is provided on the side of the silencer box 1 opposite to the air inlet 2, a flange 4 is provided at the air outlet end of the adapter pipe 3, a silencing mechanism is provided inside the silencer box 1, and an adjustment fixture is provided at the bottom of the silencer box 1. The air outlet end of the adapter pipe 3 can be connected to the air inlet of the compressor equipment through the flange 4.

[0020] like Figure 2 As shown, in order to achieve air noise reduction, the noise reduction mechanism includes a first fixed plate 5, a second fixed plate 6, and a third fixed plate 7, all of which are installed inside the noise reduction box 1. The first fixed plate 5, the second fixed plate 6, and the third fixed plate 7 divide the interior of the noise reduction box 1 into a first cavity 8, a second cavity 9, a third cavity 10, and a fourth cavity 11. Metal tubes 12, 13, and 14 are respectively installed inside the noise reduction box 1. One end of the first metal tube 12 is connected to the air inlet 2, and the other end of the first metal tube 12 passes through the first fixed plate 5 and the second fixed plate 6 in sequence. The second metal tube 13 is located in the second cavity 9, and both ends of the second metal tube 13 pass through the first fixed plate 5 and the second fixed plate 6 respectively. Both ends of the third metal tube 14 pass through the first fixed plate 5, the second fixed plate 6, and the third fixed plate 7 respectively. The end of the first metal tube 12 located in the second cavity 9 has a honeycomb shape.

[0021] like Figure 1 As shown, in order to adjust the height of the muffler box 1, the adjustment fixture includes L-shaped plates 15 set at the four opposite corners of the muffler box 1. A fixing block 16 is fixedly installed on one side of each of the four L-shaped plates 15, and a support plate 17 can be detachably installed at both ends of the L-shaped plates 15. Adjustment holes 18 are evenly opened on the support plate 17, and bolts 19 are installed in two of the adjustment holes 18. The bolts 19 pass through the adjustment holes 18 and are threaded into the fixing blocks 16.

[0022] like Figure 2 As shown, in order to enhance the sound absorption effect, sound-absorbing cotton 20 is installed in the metal pipe 12, metal pipe 23, metal pipe 34 and the adapter pipe 3, and the sound-absorbing cotton 20 is made of high-density glass fiber.

[0023] like Figure 2 As shown, in order to intercept impurities in the air, a filter cover 21 is threaded onto the outer surface of the air inlet 2.

[0024] The specific working principle is as follows: During use, air enters the metal tube 12 through the filter cover 21 and the air inlet 2. The filter cover 21 can intercept dust, particles and other impurities in the air to prevent foreign objects from entering the silencer box 1. Although its main function is filtration, the porous structure on the filter cover 21 can also produce preliminary scattering and attenuation of high-frequency noise, reducing some sharp noise. When the sound waves in the metal tube 12 enter the cavity 29 through the honeycomb structure set at one end of the metal tube 12, they will be reflected and refracted in the cavity 29. When the air enters the cavity 30, the airflow will be reflected and refracted in the cavity 30, and then enter the metal tube 23. Subsequently, the airflow enters the cavity 41 through the metal tube 34 in the cavity 18, and finally enters the compressor equipment through the adapter pipe 3. At the same time, the sound waves propagate in the metal tube 12, metal tube 23 and metal tube 34 in a tortuous manner. With the porous sound absorption of the sound-absorbing cotton 20, the mid-to-high frequency noise is further reduced. Finally, the sound-absorbing cotton 20 in the adapter pipe 3 completes the final noise absorption.

[0025] When it is necessary to adjust the height of the muffler box 1, the bolt 19 located at the top of the support plate 17 can be rotated and removed from the adjustment hole 18. Then, the bolt 19 located at the bottom of the support plate 17 can be removed. After that, the height of the two L-shaped plates 15 located at the bottom of the muffler box 1 can be adjusted and fixed with bolts 19. Finally, the muffler box 1 is placed on the two L-shaped plates 15, and the two L-shaped plates 15 located at the top of the muffler box 1 are installed on the support plate 17 with bolts 19.

[0026] Compared with the prior art, this utility model has the following advantages: through the initial noise reduction of the filter cover 21, the sound wave scattering attenuation of the multi-stage cavity and honeycomb metal tube, the energy absorption of the high-density glass fiber sound-absorbing cotton 20, and the stable installation of the adjustable tooling, it can achieve wide-band efficient reduction of compressor intake noise and ensure device adaptability.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compressor intake silencer, comprising a silencer box (1), characterized in that: An air inlet (2) is provided on one side of the silencer box (1), and a transfer pipe (3) is provided on the side of the silencer box (1) opposite to the air inlet (2). A flange (4) is provided at the air outlet end of the transfer pipe (3). A silencing mechanism is provided inside the silencer box (1), and an adjustment fixture is provided at the bottom of the silencer box (1).

2. The compressor intake silencer according to claim 1, characterized in that: The silencing mechanism includes a first fixing plate (5), a second fixing plate (6), and a third fixing plate (7) all disposed inside the silencing box (1). The first fixing plate (5), the second fixing plate (6), and the third fixing plate (7) divide the interior of the silencing box (1) into a first cavity (8), a second cavity (9), a third cavity (10), and a fourth cavity (11). The silencing box (1) is respectively provided with a first metal pipe (12), a second metal pipe (13), and a third metal pipe (14). The first metal pipe (12) One end is connected to the air inlet (2), and the other end of the metal tube (12) passes through the fixing plate (5) and the fixing plate (6) in sequence. The metal tube (13) is located in the cavity (9), and the two ends of the metal tube (13) pass through the fixing plate (5) and the fixing plate (6) respectively. The two ends of the metal tube (14) pass through the fixing plate (5), the fixing plate (6) and the fixing plate (7) respectively. The end of the metal tube (12) located in the cavity (9) is honeycomb-shaped.

3. The compressor intake silencer according to claim 2, characterized in that: The adjustment fixture includes L-shaped plates (15) set at the four opposite corners of the silencer box (1). A fixing block (16) is fixedly installed on one side of each of the four L-shaped plates (15), and a support plate (17) can be detachably installed at both ends of the L-shaped plates (15). Adjustment holes (18) are evenly opened on the support plate (17), and bolts (19) are set in two of the adjustment holes (18). The bolts (19) pass through the adjustment holes (18) and are threaded into the fixing blocks (16).

4. A compressor intake silencer according to claim 3, characterized in that: The metal tube one (12), metal tube two (13), metal tube three (14) and the transfer tube (3) are all provided with sound-absorbing cotton (20), and the sound-absorbing cotton (20) is made of high-density glass fiber.

5. A compressor intake silencer according to claim 4, characterized in that: The outer surface of the air inlet (2) is threaded with a filter cover (21).

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