A gas silencer for a screw air compressor

Abstract

The utility model relates to screw air compressor technical field discloses a screw air compressor is with gas silencer, including the shell body, the outer wall middle upper portion fixed connection of shell body has the air inlet flange, the outer wall middle lower portion fixed connection of shell body has the air outlet flange, the inner wall mounting of shell body has the silencing mechanism, the silencing mechanism is used to reduce the noise, the outer wall mounting of silencing mechanism has the damping mechanism, the damping mechanism is used to reduce the influence of vibration to structure. In the utility model, high pressure gas enters the sound attenuation cavity through the air inlet flange, produces the sound wave reflection through the cross section mutation, then passes through the honeycomb column, the outer wall of honeycomb column has many holes, these holes can absorb the medium and high frequency noise, finally through the resonator pertinence eliminates the specific low frequency noise, the flow direction is optimized to the flow cone body, reduces the vortex production, and the noise reduction effect is remarkable, can also reduce the system pressure.

Description

Technical Field

[0001] This utility model relates to the field of screw air compressor technology, and in particular to a gas silencer for screw air compressors. Background Technology

[0002] A screw air compressor is a positive displacement compressor that compresses gas by meshing with a screw rotor. It features high efficiency, strong stability, and convenient maintenance, and is widely used in industrial production, medical, and food industries. Air compressors use gas silencers, which reduce pressure pulsation and radiated noise of exhaust airflow through resistive silencing, reactive silencing, and impedance composite silencing to meet industrial environmental noise standards.

[0003] A search revealed Chinese Patent Publication No. CN218325300U, which discloses a horizontal gas silencer for an oil-free screw air compressor. The silencer includes a silencing outer shell and a silencing inner shell fixedly installed inside the outer shell. One end of the outer shell is connected to an air inlet pipe. With the cooperation of a pressing post, a limiting groove, a third spring, a limiting post, a first spring, a mounting groove, a U-shaped rod, an L-shaped rod, a second spring, a connecting ring, and a support rod, the connecting ring pushes the sealing cover. The sealing cover causes two U-shaped rods to slide within corresponding grooves. Simultaneously, the U-shaped rods cause the limiting post and the connecting post to slide within the connecting groove. At this point, the sealing cover disengages from the silencing inner shell, allowing the silencing cotton to be replaced. This utility model relates to... In the technical field of oil-free screw air compressor equipment, this utility model has the advantages of being able to easily open the sealing cover to expose the sound-absorbing cotton to the outside, and easily replace the sound-absorbing cotton in the horizontal gas silencer without any tools. It is simple to operate and easy to use. The silencer is too large and irregularly shaped, making it difficult to place in the small installation space of the compressor. The silencer is designed as a detachable modular structure, which facilitates the replacement of sound-absorbing materials and internal maintenance, and at the same time reduces the size to adapt to the compact installation space. However, the sound-absorbing material is prone to aging and falling off during long-term use, resulting in a decrease in sound-absorbing performance. At the same time, due to unreasonable structural design, it often causes a large pressure loss, affecting the working efficiency of the compressor. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a gas silencer for screw air compressors, aiming to improve the problems in the existing technology where the sound-absorbing material is prone to aging and falling off during long-term use, resulting in a decline in silencer performance. At the same time, due to unreasonable structural design, it often causes a large pressure loss, affecting the working efficiency of the compressor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gas silencer for a screw air compressor, comprising a housing, an inlet flange fixedly connected to the upper part of the outer wall of the housing, an outlet flange fixedly connected to the lower part of the outer wall of the housing, a silencer mechanism installed on the inner wall of the housing for reducing noise, and a vibration damping mechanism installed on the outer wall of the silencer mechanism for reducing the impact of vibration on the structure; the silencer mechanism includes a sealing plate fixedly connected to the top of the housing, a silencer cavity installed in the middle of the top wall of the sealing plate, a limiting ring fixedly connected to the upper part of the inner wall of the housing, and a sound-absorbing component installed on the inner side of the limiting ring.

[0006] The above technical solution allows high-pressure gas to enter the silencing chamber through the inlet flange. The sudden change in cross-section generates sound wave reflection, which makes the noise reduction effect more significant and can also reduce the pressure of the entire system.

[0007] As a further description of the above technical solution:

[0008] The sound-absorbing component includes a honeycomb column, which is fixedly connected to the inner side of the limiting ring, and a resonator is fixedly connected to the bottom end of the honeycomb column.

[0009] The above technical solution involves gas passing through a honeycomb column, the outer wall of which has numerous pores that can absorb mid-to-high frequency noise. Finally, the gas is selectively eliminated by a resonator for specific low-frequency noise.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the resonator is fixedly connected to a limiting ring two, and a flow guide cone is installed on the bottom wall of the limiting ring two.

[0012] The above technical solution optimizes airflow direction, reduces eddy current generation, significantly reduces noise, and also reduces system pressure.

[0013] As a further description of the above technical solution:

[0014] The shock absorption mechanism includes rubber rings, which are equidistantly installed on the upper part of the inner wall of the outer shell, and fixing components are installed at both the upper and lower ends of the rubber rings.

[0015] The above technical solution involves aligning and splicing mounting block one and mounting block two together, and then screwing in bolts for fixation.

[0016] As a further description of the above technical solution:

[0017] The fixing component includes a second mounting block, which is installed on the upper part of the inner wall of the outer shell. A first mounting block is installed on the right side of the outer wall of the second mounting block. The inner walls of the second mounting block and the first mounting block are both threaded with bolts.

[0018] Through the above technical solution: when the gas passes through the silencing cavity, it will vibrate, and the vibration of mounting block one and mounting block two will compress the damping rod and spring one.

[0019] As a further description of the above technical solution:

[0020] Both mounting block 2 and mounting block 1 have damping rods installed on their top walls, and spring 1 is installed on the outer wall of the damping rods.

[0021] Through the above technical solution, when the spring is subjected to vibration, it undergoes elastic deformation, absorbs and buffers vibration energy, further improves the structure's vibration resistance, and can also absorb some noise.

[0022] As a further description of the above technical solution:

[0023] A fixing ring 2 is fixedly connected to the top of the outer shell, a fixing block is installed on the outer wall of the fixing ring 2, and multiple springs 2 are installed at equal intervals on the top wall of the fixing ring 2.

[0024] Through the above technical solution: the first fixed ring is subjected to the compressive force from the air compressor, thereby sliding on the outer wall of the second fixed ring. This sliding action will compress the second spring, so that the first fixed ring can fit tightly against the connection part of the air compressor, ensuring the stability of the connection.

[0025] As a further description of the above technical solution:

[0026] A fixing ring is installed on the top of the second spring, and the fixing ring is slidably connected to the outer wall of the second fixing ring.

[0027] With the above technical solution, the first fixed ring will be subjected to the compressive force from the air compressor, thereby sliding on the outer wall of the second fixed ring.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, high-pressure gas enters the silencing cavity through the inlet flange, and generates sound wave reflection through the abrupt change in cross section. Then it passes through the honeycomb column, which has many holes on its outer wall. These holes can absorb mid-to-high frequency noise. Finally, the resonator specifically eliminates specific low-frequency noise. The guide cone optimizes the airflow direction and reduces the generation of eddies. The noise reduction effect is significant and can also reduce the system pressure.

[0030] 2. In this utility model, the gas will vibrate when it passes through the silencing cavity. The vibration of mounting block one and mounting block two compresses the damping rod and spring one. When spring one is vibrated, it undergoes elastic deformation, which absorbs and buffers the vibration energy, further improving the structure's vibration resistance. It can also absorb some noise, avoid the loosening, wear or even damage of parts due to long-term vibration, and extend the service life of the equipment. Attached Figure Description

[0031] Figure 1 This is a perspective view of a gas silencer for a screw air compressor proposed in this utility model;

[0032] Figure 2 This is a front view of a gas silencer for a screw air compressor proposed in this utility model;

[0033] Figure 3 This is a schematic diagram of the internal structure of a gas silencer for a screw air compressor proposed in this utility model;

[0034] Figure 4 This is a partial structural schematic diagram of a gas silencer for a screw air compressor proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the vibration damping mechanism of a gas silencer for a screw air compressor proposed in this utility model.

[0036] Legend:

[0037] 1. Outer shell; 2. Inlet flange; 3. Outlet flange; 4. Silencing mechanism; 401. Silencing chamber; 402. Sealing plate; 403. Limiting ring one; 404. Sound absorption assembly; 4041. Honeycomb column; 4042. Resonator; 405. Limiting ring two; 406. Guide cone; 5. Vibration damping mechanism; 501. Damping rod; 502. Rubber ring; 503. Spring one; 504. Fixing assembly; 5041. Mounting block one; 5042. Mounting block two; 5043. Bolt; 6. Spring two; 7. Fixing ring one; 8. Fixing ring two; 9. Fixing block. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a gas silencer for a screw air compressor, comprising a housing 1, an inlet flange 2 fixedly connected to the upper part of the outer wall of the housing 1, an outlet flange 3 fixedly connected to the lower part of the outer wall of the housing 1, a silencer mechanism 4 installed on the inner wall of the housing 1 for reducing noise, and a vibration damping mechanism 5 installed on the outer wall of the silencer mechanism 4 for reducing the impact of vibration on the structure; the silencer mechanism 4 includes a sealing plate 402 fixedly connected to the top of the housing 1, a silencer cavity 401 installed in the middle of the top wall of the sealing plate 402, a limiting ring 403 fixedly connected to the upper part of the inner wall of the housing 1, a sound-absorbing component 404 installed on the inner side of the limiting ring 403, the sound-absorbing component 404 including honeycomb columns 4041 fixedly connected to the inner side of the limiting ring 403. On the side, a resonator 4042 is fixedly connected to the bottom end of the honeycomb column 4041. A limiting ring 405 is fixedly connected to the outer wall of the resonator 4042. A guide cone 406 is installed on the bottom wall of the limiting ring 405. In the silencing system, high-pressure gas first enters the silencing chamber 401 through the air inlet flange 2. During this process, the high-speed flow of the gas will encounter a sudden change in the cross section, resulting in the reflection of the sound wave. Subsequently, the gas flows through the honeycomb column 4041. The outer wall of the honeycomb column 4041 is designed with numerous tiny holes. These holes can effectively absorb mid-to-high frequency noise components. Then, the resonator 4042 plays its role. It can specifically eliminate low-frequency noise of a specific frequency. In addition, the presence of the guide cone 406 optimizes the airflow direction and reduces the generation of eddies, thereby making the noise reduction effect more significant and also reducing the pressure of the entire system.

[0040] Specifically, high-pressure gas enters the silencing chamber 401 through the inlet flange 2, and generates sound wave reflection through a sudden change in cross section. Then it passes through the honeycomb column 4041, which has many holes on its outer wall. These holes can absorb mid-to-high frequency noise. Finally, the resonator 4042 specifically eliminates certain low-frequency noise. The guide cone 406 optimizes the airflow direction and reduces the generation of eddies. The noise reduction effect is significant and can also reduce the system pressure.

[0041] Reference Figure 1 , Figure 3 and Figure 5The shock absorption mechanism 5 includes a rubber ring 502, which is equidistantly installed on the upper part of the inner wall of the outer shell 1. Fixing components 504 are installed at both the upper and lower ends of the rubber ring 502. Each fixing component 504 includes a second mounting block 5042, which is installed on the upper part of the inner wall of the outer shell 1. A first mounting block 5041 is installed on the right side of the outer wall of the second mounting block 5042. Bolts 5043 are threadedly connected to the inner walls of both the second mounting block 5042 and the first mounting block 5041. Damping rods 501 are installed on the top walls of both the second mounting block 5042 and the first mounting block 5041. A spring is installed on the outer wall of the damping rod 501. 503. In the silencing cavity 401, the gas flow inevitably causes vibration. To cope with this vibration, the system is equipped with two key components: mounting block 1 5041 and mounting block 2 5042. When vibration occurs, these two mounting blocks will apply pressure to the damping rod 501 and spring 1 503. Spring 1 503 will undergo elastic deformation under the action of vibration. This deformation helps to absorb and buffer vibration energy, thereby enhancing the vibration resistance of the entire structure. Through this mechanism, the system can not only absorb some noise, but also prevent the loosening, wear and even damage of components caused by long-term vibration, effectively extending the service life of the equipment.

[0042] Specifically, when the gas passes through the silencing chamber 401, it will vibrate. The vibration of mounting block 1 5041 and mounting block 2 5042 will compress the damping rod 501 and spring 1 503. When the spring 1 503 is vibrated, it will undergo elastic deformation, which will absorb and buffer the vibration energy, further improve the vibration resistance of the structure, and also absorb some noise. This will prevent the components from loosening, wearing or even being damaged due to long-term vibration, and extend the service life of the equipment.

[0043] Reference Figure 1 , Figure 2 and Figure 3 A fixing ring 2 8 is fixedly connected to the top of the outer shell 1. A fixing block 9 is installed on the outer wall of the fixing ring 2 8. Multiple springs 2 6 are installed at equal intervals on the top wall of the fixing ring 2 8. A fixing ring 1 7 is installed on the top of the springs 2 6. The fixing ring 1 7 is slidably connected to the outer wall of the fixing ring 2 8.

[0044] Specifically, during the process of connecting the muffler to the air compressor, the retaining ring 7 is subjected to the compressive force from the air compressor, causing it to slide on the outer wall of the retaining ring 8. This sliding action compresses the spring 6, thereby allowing the retaining ring 7 to fit tightly against the connection part of the air compressor, ensuring the stability of the connection and preventing loosening due to vibration or other external forces.

[0045] Working principle: In the silencing system, high-pressure gas first enters the silencing chamber 401 through the inlet flange 2. During this process, the high-speed flow of gas encounters a sudden change in cross-section, thereby generating sound wave reflection. Subsequently, the gas flows through the honeycomb column 4041. The outer wall of the honeycomb column 4041 is designed with numerous tiny holes. These holes can effectively absorb mid-to-high frequency noise components. Next, the resonator 4042 plays a role, which can specifically eliminate low-frequency noise of a certain frequency. In addition, the presence of the guide cone 406 optimizes the airflow direction and reduces the generation of eddies, thereby making the noise reduction effect more significant and also reducing the pressure of the entire system.

[0046] When gas flows in the silencing cavity 401, vibration is inevitable. To cope with this vibration, two important components are installed in the system: mounting block 1 5041 and mounting block 2 5042. When vibration occurs, these two mounting blocks will compress the damping rod 501 and spring 1 503. Spring 1 503 will undergo elastic deformation under the action of vibration. This deformation can absorb and buffer vibration energy, thereby further improving the vibration resistance of the entire structure. In this way, the system can not only absorb some noise, but also prevent the components from loosening, wearing or even being damaged due to long-term vibration, thus effectively extending the service life of the equipment.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas silencer for a screw air compressor, comprising a housing (1), characterized in that: An air inlet flange (2) is fixedly connected to the upper part of the outer wall of the outer shell (1), and an air outlet flange (3) is fixedly connected to the lower part of the outer wall of the outer shell (1). A silencing mechanism (4) is installed on the inner wall of the outer shell (1). The silencing mechanism (4) is used to reduce noise. A vibration damping mechanism (5) is installed on the outer wall of the silencing mechanism (4). The vibration damping mechanism (5) is used to reduce the impact of vibration on the structure. The silencing mechanism (4) includes a sealing plate (402), which is fixedly connected to the top of the outer shell (1). A silencing cavity (401) is installed in the middle of the top wall of the sealing plate (402). A limiting ring (403) is fixedly connected to the upper middle part of the inner wall of the outer shell (1). A sound-absorbing component (404) is installed on the inner side of the limiting ring (403).

2. The gas silencer for a screw air compressor according to claim 1, characterized in that: The sound-absorbing component (404) includes a honeycomb column (4041), which is fixedly connected to the inner side of the limiting ring (403), and a resonator (4042) is fixedly connected to the bottom end of the honeycomb column (4041).

3. A gas silencer for a screw air compressor according to claim 2, characterized in that: The outer wall of the resonator (4042) is fixedly connected to a limiting ring two (405), and a flow guide cone (406) is installed on the bottom wall of the limiting ring two (405).

4. A gas silencer for a screw air compressor according to claim 1, characterized in that: The shock absorption mechanism (5) includes a rubber ring (502), which is equidistantly installed on the upper part of the inner wall of the outer shell (1), and a fixing component (504) is installed at both the upper and lower ends of the rubber ring (502).

5. A gas silencer for a screw air compressor according to claim 4, characterized in that: The fixing component (504) includes a second mounting block (5042), which is installed on the upper part of the inner wall of the outer shell (1). A first mounting block (5041) is installed on the right side of the outer wall of the second mounting block (5042). The inner walls of the second mounting block (5042) and the first mounting block (5041) are both threaded with bolts (5043).

6. A gas silencer for a screw air compressor according to claim 5, characterized in that: The top walls of both mounting block 2 (5042) and mounting block 1 (5041) are equipped with damping rods (501), and the outer walls of the damping rods (501) are equipped with springs (503).

7. A gas silencer for a screw air compressor according to claim 1, characterized in that: The top of the outer shell (1) is fixedly connected to a fixing ring 2 (8), and a fixing block (9) is installed on the outer wall of the fixing ring 2 (8). Multiple springs 2 (6) are installed at equal intervals on the top wall of the fixing ring 2 (8).

8. A gas silencer for a screw air compressor according to claim 7, characterized in that: A fixing ring 1 (7) is installed on the top of the second spring (6), and the fixing ring 1 (7) is slidably connected to the outer wall of the second fixing ring (8).

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