Noise elimination and vibration reduction device

Abstract

The invention discloses a noise elimination and vibration reduction device, and belongs to the technical field of compressor noise elimination, and the noise elimination and vibration reduction device comprises a main cylinder body, a main cylinder body and a main cylinder body, the first cylinder is arranged in the buffer cavity; and the second barrel is arranged in the first barrel, a flow dividing cavity is formed between the second barrel and the first barrel, the flow dividing cavity is communicated with the air inlet, an opposite flushing cavity is defined by the second barrel, the opposite flushing cavity is communicated with the buffering cavity, the second barrel is provided with at least one opposite flushing hole set, and each opposite flushing hole set comprises two opposite flushing holes which are oppositely formed. When gas in the flow dividing cavity enters the convection cavity through the two oppositely-arranged opposite punching holes, the flow directions of the gas in the two opposite punching holes are opposite, and the gas can be mutually punched in the convection cavity, so that kinetic energy carried by the gas can be consumed, the energy of gas pulsation can be mutually counteracted, the speed of the gas passing through the opposite punching holes is reduced, and the gas pulsation effect is improved. Vibration of the exhaust pipeline caused by impact of airflow is reduced, and meanwhile the silencing effect is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of compressor vibration reduction and noise reduction, and particularly relates to a noise reduction and vibration reduction device. Background Art

[0002] Compressors are designed for specific environments, providing customers with essential compressed gas and playing a vital role in the operation, maintenance, and safety of other equipment. Compressors compress gas during operation, but this compression and impact can induce significant airflow pulsation, vibration, and noise in the exhaust pipe. Summary of the Invention

[0003] Purpose of the invention: The embodiment of the present application provides a noise reduction and vibration reduction device, which aims to overcome the technical problem that when the compressor is working, large air flow pulsation vibration and noise will be generated in the exhaust pipe.

[0004] Technical solution: A noise reduction and vibration reduction device according to an embodiment of the present application includes:

[0005] The main cylinder has a buffer chamber and an air inlet;

[0006] A first cylinder is disposed in the buffer cavity;

[0007] The second cylinder is arranged in the first cylinder, and a diverter cavity is formed between the second cylinder and the first cylinder, and the diverter cavity is connected with the air inlet. The second cylinder forms a counter-punch cavity, and the counter-punch cavity is connected with the buffer cavity. The second cylinder has at least one counter-punch hole group, and the counter-punch hole group includes two oppositely arranged counter-punch holes, and the counter-punch holes are respectively connected with the diverter cavity and the counter-punch cavity, and the counter-punch holes are used to discharge the gas in the diverter cavity into the counter-punch cavity.

[0008] In some embodiments, the first cylinder and the second cylinder are spaced apart; the noise and vibration reduction device further comprises:

[0009] A connecting piece is provided in the buffer cavity and is connected to the first cylinder and the second cylinder respectively. The connecting piece is used to separate the diversion cavity and the buffer cavity.

[0010] In some embodiments, the connecting member has a curved surface, and the curved surface is arranged toward the diversion cavity.

[0011] In some embodiments, the first barrel comprises:

[0012] an expansion portion connected to the main cylinder, the expansion portion having an opening communicating with the air inlet, the expansion portion having a first size L1, and the first size L1 gradually increasing in a direction from the air inlet to the opening;

[0013] The first shell part is connected to a side of the expansion part away from the air inlet, and the side of the first shell part away from the expansion part is connected to the connecting member.

[0014] In some embodiments, the second barrel comprises:

[0015] a second housing portion connected to the connecting member, wherein the plurality of punching holes are spaced apart along the circumference of the second housing portion;

[0016] The air guide portion is connected to a side of the second shell portion facing the air inlet. The air guide portion has a second size L2. The second size L2 gradually increases from the air guide portion to the second shell portion.

[0017] In some embodiments, the noise and vibration reduction device further comprises:

[0018] A buffer assembly is disposed in the buffer cavity and is connected to the main cylinder and the first cylinder respectively. The buffer assembly is used to reduce vibration of the first cylinder and the second cylinder.

[0019] In some embodiments, the buffer assembly includes:

[0020] A plurality of vibration damping groups are arranged at intervals along the axial direction of the first cylinder. The vibration damping groups include a plurality of vibration absorbers, and the plurality of vibration absorbers are arranged at intervals along the circumferential direction of the first cylinder.

[0021] In some embodiments, the shock absorber is arranged to be inclined relative to the radial direction of the first cylinder.

[0022] In some embodiments, the buffer assembly further comprises:

[0023] The bellows portion is connected to the first cylinder and the main cylinder respectively. The bellows portion has an air flow channel, and the air flow channel is communicated with the air inlet and the diversion cavity respectively.

[0024] In some embodiments, the main cylinder has an air outlet; the noise reduction and vibration reduction device includes:

[0025] A flow stabilizing component is located between the air outlet and the first cylinder and is connected to the main cylinder. The flow stabilizing component has a flow stabilizing chamber connected to the air inlet and a plurality of first perforations connected to the flow stabilizing chamber. The flow stabilizing chamber is connected to the buffer chamber through the plurality of first perforations.

[0026] In some embodiments, the flow stabilization component includes:

[0027] a plurality of sealing plates, the plurality of sealing plates being arranged at intervals along the axial direction of the first cylinder and connected to the main cylinder;

[0028] The first flow stabilizing plate is respectively connected to the main cylinder and the multiple sealing plates. The first flow stabilizing plate, the main cylinder and the multiple sealing plates together form the flow stabilizing chamber. The first flow stabilizing plate is provided with multiple first perforations. The multiple first perforations are located on one side of the first cylinder in the radial direction and are spaced apart from the first cylinder.

[0029] In some embodiments, the flow stabilization component includes:

[0030] The second flow stabilizing plate is located in the flow stabilizing chamber and is respectively connected to the main cylinder and the multiple sealing plates. The second flow stabilizing plate has multiple second perforations. The second flow stabilizing plate is used to separate the flow stabilizing chamber into a first cavity and a second cavity. The first cavity and the second cavity are arranged at intervals along the direction from the first cylinder to the first flow stabilizing plate. The first cavity is connected to the second cavity through multiple second perforations. The first cavity is connected to the buffer cavity through multiple first perforations, and the second cavity is connected to the air inlet.

[0031] In some embodiments, along the direction from the first flow stabilizing plate to the second flow stabilizing plate, the first through-hole and the second through-hole are staggered.

[0032] Beneficial effects: The sound-absorbing and vibration-reducing device of the embodiment of the present application comprises: a main cylinder having a buffer chamber and an air inlet; a first cylinder arranged in the buffer chamber; a second cylinder arranged in the first cylinder, a diverter chamber is formed between the second cylinder and the first cylinder, the diverter chamber is connected to the air inlet, the second cylinder forms a counter-punch chamber, the counter-punch chamber is connected to the buffer chamber, the second cylinder has at least one counter-punch hole group, the counter-punch hole group comprises two oppositely arranged counter-punch holes, the counter-punch holes are respectively connected to the diverter chamber and the counter-punch chamber, and the counter-punch holes are used to discharge the gas in the diverter chamber into the counter-punch chamber. When the gas in the diverter chamber enters the convection chamber through the two oppositely arranged counter-punch holes, the flow directions of the gases in the two counter-punch holes are opposite, and the gases can collide with each other in the convection chamber, thereby consuming the kinetic energy carried by each other, so that the energy of the airflow pulsation can offset each other, reduce the airflow speed through the counter-punch holes, reduce the vibration of the exhaust pipe caused by the impact of the airflow, and have the effect of sound absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1This is a three-dimensional diagram of the noise reduction and vibration reduction device according to an embodiment of the present application;

[0035] Figure 2 This is a three-dimensional cross-sectional view of the noise reduction and vibration reduction device according to an embodiment of the present application;

[0036] Figure 3 This is a three-dimensional diagram of the first cylinder, the second cylinder and the connecting member of the embodiment of the present application;

[0037] Figure 4 This is a front cross-sectional view of the first cylinder, the second cylinder and the connecting member of the embodiment of the present application;

[0038] Figure 5 A three-dimensional cross-sectional view of the noise reduction and vibration reduction device according to an embodiment of the present application from another perspective;

[0039] Figure 6 This is a front cross-sectional view of the noise reduction and vibration reduction device according to an embodiment of the present application, wherein arrows indicate the direction of airflow;

[0040] Figure 7 This is a structural schematic diagram of a flow stabilizing component according to an embodiment of the present application;

[0041] Figure 8 This is another structural schematic diagram of the flow stabilization component of an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 10-main cylinder; 11-buffer chamber; 12-air inlet; 13-air outlet; 20-first cylinder; 21-expansion part; 211-opening; 22-first shell part; 30-second cylinder; 31-diverter chamber; 32-counter-punch chamber; 33-counter-punch hole group; 331-counter-punch hole; 34-second shell part; 35-flow guide part; 40-connecting piece; 41-arc-shaped surface; 50-buffer assembly; 51-vibration reduction group; 511-vibration reducer; 52-bellows part; 521-air flow channel; 60-flow stabilizing assembly; 61-flow stabilizing chamber; 611-first cavity; 612-second cavity; 62-first perforation; 63-sealing plate; 64-first flow stabilizing plate; 65-second flow stabilizing plate; 651-second perforation. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, and at least one means one, two, or more, unless otherwise clearly and specifically defined.

[0046] Compressors on ships are designed for the specific environment of ships, providing essential compressed gas and playing a vital role in the ship's operation, maintenance, and safety. Compressor vibration and noise are primarily categorized into three main components: mechanical vibration and noise, primarily due to impact, collision, and friction caused by poor rotor machining precision, rotor meshing, and bearing assembly misalignment; airflow-induced pulsating vibration and noise, primarily due to pressure pulsation; and electromagnetic vibration and noise generated by the motor. Identifying the source of compressor vibration and noise reveals that the primary source is pressure pulsation-induced pulsating vibration. When the compressor passes compressed gas into the exhaust line, the compression and impact of the gas induce significant airflow pulsation vibration and noise in the exhaust line.

[0047] Currently, the suppression of compressor airflow pulsation mainly involves designing a Helmholtz pressure pulsation attenuation cavity at the compressor exhaust pipe. However, the Helmholtz pressure pulsation attenuation cavity has a rigid structure, and the airflow impacting the wall will produce secondary vibrations, and it cannot effectively cover the noise line spectrum generated by the compressor under different working conditions.

[0048] In view of this, an embodiment of the present application provides a noise reduction and vibration reduction device to overcome at least one of the above-mentioned technical problems.

[0049] See also Figure 1 and Figure 2 In the embodiment of the present application, the noise reduction and vibration reduction device includes a main cylinder 10, a first cylinder 20 and a second cylinder 30.

[0050] The main cylinder 10 has a buffer chamber 11 and an air inlet 12. The first cylinder 20 is arranged in the buffer chamber 11. The second cylinder 30 is arranged in the first cylinder 20, and a diverter chamber 31 is formed between the second cylinder 30 and the first cylinder 20. The diverter chamber 31 is connected to the air inlet 12. The second cylinder 30 is surrounded by a counter-punch chamber 32, and the counter-punch chamber 32 is connected to the buffer chamber 11. The second cylinder 30 has at least one counter-punch hole group 33, and the counter-punch hole group 33 includes two oppositely arranged counter-punch holes 331. The counter-punch holes 331 are respectively connected to the diverter chamber 31 and the counter-punch chamber 32. The counter-punch holes 331 are used to discharge the gas in the diverter chamber 31 into the counter-punch chamber 32.

[0051] It can be understood that the compressor is connected to the exhaust pipe through the sound-absorbing and vibration-reducing device, and the main cylinder 10 on the sound-absorbing and vibration-reducing device has an air inlet 12, which can be connected to the compressor so that the gas discharged from the compressor can enter the interior of the sound-absorbing and vibration-reducing device through the air inlet 12. The first cylinder 20 is arranged in the buffer chamber 11 inside the main cylinder 10, and is directly connected to the main cylinder 10 or indirectly connected through other structures, wherein the air inlet 12 is not connected to the buffer chamber 11. A second cylinder 30 is provided inside the first cylinder 20, and a diverter chamber 31 enclosed between the first cylinder 20 and the second cylinder 30 is connected to the air inlet 12, so that the gas discharged from the compressor can enter the diverter chamber 31 through the air inlet 12.

[0052] One or more counter-punch hole groups 33 are provided on the second cylinder 30, and the counter-punch hole groups 33 can pass the gas in the diverter chamber 31 into the counter-punch chamber 32 surrounded by the second cylinder 30. Since each counter-punch hole group 33 includes two counter-punch holes 331 arranged oppositely, when the gas in the diverter chamber 31 enters the convection chamber 31 through the two counter-punch holes 331, the flow directions of the gases in the two counter-punch holes 331 are opposite, and they can collide with each other in the convection chamber 31, thereby consuming the kinetic energy carried by each other, so that the energy of the air flow pulsation can offset each other, reducing the air flow speed through the counter-punch holes 331, reducing the exhaust pipe vibration caused by the air flow impact, and at the same time playing a role in silencing. After the gas enters the diverter chamber 31, the pressure pulsation is partially attenuated. When the gas enters the counter-punch chamber 32 from the diverter chamber 31, the pressure pulsation is further attenuated, and the gas in the counter-punch chamber 32 is counter-punched instead of directly impacting the inner wall surface of the main cylinder 10, which can avoid secondary vibration.

[0053] A plurality of counter-punching holes 331 can be arranged around the circumference of the second cylinder 30. When a plurality of counter-punching hole groups 33 are arranged, the counter-punching points of the gases in the plurality of counter-punching hole groups 33 can converge at the same position. Since the gas has greater fluidity, multiple streams of gas can be counter-punched from multiple directions, further improving the counter-punching effect and consuming the impact force of the gas. A connecting pipe of a shorter length can be arranged at the position of the counter-punching hole 331. The connecting pipe can extend from the position of the counter-punching hole 331 into the counter-punching cavity 32. The connecting pipes connected to the two oppositely arranged counter-punching holes 331 are also arranged relatively relatively, which can play a certain guiding role for the gas passing through the corresponding counter-punching holes 331, so that the gas passing through the two counter-punching holes 331 can be counter-punched more concentratedly, offsetting the pulsating energy of the airflow to a greater extent, and improving the vibration reduction and noise reduction effects.

[0054] See also Figure 2In combination with the above embodiments, in some embodiments, the first cylinder 20 and the second cylinder 30 are spaced apart. The noise and vibration reduction device further includes a connector 40, which is disposed in the buffer chamber 11 and is connected to the first cylinder 20 and the second cylinder 30, respectively. The connector 40 is used to separate the diversion chamber 31 from the buffer chamber 11.

[0055] It is understandable that the first cylinder 20 and the second cylinder 30 can be connected by a connector 40, and the connector 40 is respectively connected to the side of the first cylinder 20 away from the air inlet 12 and the side of the second cylinder 30 away from the air inlet 12. Since a diverter chamber 31 is formed between the first cylinder 20 and the second cylinder 30, the diverter chamber 31 and the buffer chamber 11 can be separated by the connector 40 with an annular structure to prevent the two from being connected (if the two are connected, part of the gas in the diverter chamber 31 will directly enter the buffer chamber 11 without being counterbalanced by the punching hole 331, and will still maintain a large kinetic energy to impact the main cylinder 10, causing the main cylinder 10 to vibrate greatly and generate airflow impact noise). This is equivalent to blocking one end of the diverter chamber 31 by the connector 40, so that the gas entering the diverter chamber 31 enters the counterbalance chamber 32 through the punching hole 331, completing the counterbalance consumption of the gas and greatly reducing the impact of the gas on the wall of the main cylinder 10.

[0056] At the same time, the first cylinder 20 and the second cylinder 30 are arranged at intervals, and the second cylinder 30 is completely surrounded by the diversion cavity 31, so that as many punching hole groups 33 as possible can be set on the surface of the second cylinder 30, so that more gas in the diversion cavity 31 enters the punching cavity 32 through the punching hole group 33, thereby improving the punching efficiency and flow efficiency of the gas and allowing more gas to pass through.

[0057] See also Figure 3 In combination with the above embodiments, in some embodiments, the connecting member 40 has an arcuate surface 41 , and the arcuate surface 41 is arranged toward the diversion cavity 31 .

[0058] It is understood that the surface of the connector 40 facing the diverter chamber 31 is an arcuate surface 41. As the gas within the diverter chamber 31 flows along the arcuate surface 41, the arcuate surface 41 can provide some guidance and buffering for the gas. For example, some gas within the diverter chamber 31 will flow from top to bottom along the arcuate surface 41, while some gas will flow from bottom to top along the arcuate surface 41. These two gas flows in opposite directions and collide with each other, thereby consuming some energy, reducing the gas flow rate and impact force, and thus reducing gas pressure pulsation and noise.

[0059] See also Figure 4In some embodiments, the first cylinder 20 comprises an expansion portion 21 and a first housing portion 22. The expansion portion 21 is connected to the main cylinder 10. The expansion portion 21 has an opening 211 which is in communication with the air inlet 12. The expansion portion 21 has a first dimension L1 which gradually increases from the air inlet 12 to the opening 211. The first housing portion 22 is connected to the expansion portion 21 at a side of the expansion portion 21 which is away from the air inlet 12. The side of the first housing portion 22 which is away from the expansion portion 21 is connected to the connecting member 40.

[0060] It can be understood that the expansion portion 21 of the first cylinder 20 is connected to the main cylinder 10 directly or indirectly. Specifically, the expansion portion 21 is connected to the main cylinder 10 at the position of the air inlet 12, so that the opening 211 of the expansion portion 21 is in communication with the air inlet 12. The first housing portion 22 is connected to the expansion portion 21 at a side of the expansion portion 21 which is away from the air inlet 12. The side of the first housing portion 22 which is away from the expansion portion 21 is connected to the connecting member 40. The expansion portion 21 has a horn-shaped structure. The first dimension L1 of the expansion portion 21 gradually increases from the air inlet 12 to the opening 211 (the first dimension L1 is the dimension of the cross section of the internal space of the expansion portion 21 in the radial direction), that is, the internal space of the expansion portion 21 gradually increases. The flow area of the gas entering the internal space of the expansion portion 21 through the air inlet 12 changes suddenly, which causes the acoustic impedance to change suddenly (the acoustic impedance is the hindering effect of the medium on the sound energy when the sound wave propagates in the medium). During the propagation of sound, when the acoustic impedance changes suddenly, part of the sound energy is reflected back to the upstream, so that only part of the sound energy can continue to propagate to the downstream. Therefore, by changing the flow area of the gas, the effect of reducing noise can be achieved, and the performance of eliminating medium and low frequency noise can be achieved.

[0061] Please refer to Figure 4 In some embodiments, the second cylinder 30 comprises a second housing portion 34 and a flow guide portion 35. The second housing portion 34 is connected to the connecting member 40. A plurality of offset holes 331 are arranged along the circumferential direction of the second housing portion 34. The flow guide portion 35 is connected to the side of the second housing portion 34 which is towards the air inlet 12. The flow guide portion 35 has a second dimension L2 which gradually increases from the flow guide portion 35 to the second housing portion 34.

[0062] It can be understood that the second shell part 34 on the second cylinder 30 is connected to the connecting piece 40, and a plurality of punching holes 331 can be set on the second shell part 34, and the guide part 35 is connected to the side of the second shell part 34 away from the connecting piece 40, and the guide part 35 and the second shell part 34 together constitute the second cylinder 30. The guide portion 35 has a conical structure. In the direction from the guide portion 35 to the second shell portion 34, the second dimension L2 on the guide portion 35 gradually increases (wherein the second dimension L2 is the radial dimension of the cross section of the guide portion 35), and the smaller end thereof is set toward the direction of the air inlet 12. The gas enters the diversion cavity 31 through the air inlet 12, and then impacts the surface of the guide portion 35, which plays a guiding role on the gas, disperses the gas, and flows toward different positions of the punch holes 331, making it convenient for the gas to enter the punch cavity 32 through the punch holes 331; the structural setting of the guide portion 35 can also reduce the resistance to the gas, thereby reducing the impact force of the gas on the guide portion 35, and further reducing vibration noise.

[0063] Multiple counter-punching holes 331 are provided on the second cylinder 30. When gas enters the counter-punching cavity 32 through the counter-punching holes 331, and when the gas in the counter-punching cavity 32 enters the buffer cavity 11, the gas flow area also changes (the flow area changes from small to large, which can suppress the flow rate and pulsation of the gas). This causes a sudden change in acoustic impedance, and some sound energy is reflected back upstream, so that only part of the sound energy can continue to propagate downstream. Therefore, this structural setting can also have the effect of reducing noise, and has the performance of eliminating medium and low-frequency noise.

[0064] See also Figure 2 In combination with the above embodiments, in some embodiments, the noise reduction and vibration reduction device further includes a buffer assembly 50. The buffer assembly 50 is disposed in the buffer cavity 11 and is connected to the main cylinder 10 and the first cylinder 20 respectively. The buffer assembly 50 is used to reduce the vibration of the first cylinder 20 and the second cylinder 30.

[0065] It can be understood that a buffer assembly 50 is arranged between the first cylinder 20 and the main cylinder 10. When the gas impacts the first cylinder 20 or the second cylinder 30 in the diversion chamber 31 or in the counter-flow chamber 32, causing the first cylinder 20 or the second cylinder 30 to vibrate, the buffer assembly 50 connected to the first cylinder 20 can absorb or suppress the vibration energy, reduce the vibration energy transmitted to the main cylinder 10, and thereby suppress the vibration of the compressor and the exhaust pipe caused by the airflow pulsation.

[0066] See also Figure 2 and Figure 5In combination with the above embodiments, in some embodiments, the buffer assembly 50 includes a plurality of vibration damping groups 51, which are arranged at intervals along the axial direction of the first cylinder 20, and the vibration damping group 51 includes a plurality of shock absorbers 511, which are arranged at intervals along the circumference of the first cylinder 20.

[0067] It is understandable that the buffer assembly 50 can be composed of a plurality of vibration damping groups 51, which are arranged at intervals along the axial direction of the first cylinder 20 and connected between the first cylinder 20 and the main cylinder 10. Each vibration damping group 51 is composed of a plurality of vibration dampers 511, and the plurality of vibration dampers 511 are arranged around the first cylinder 20. The first cylinder 20 is connected to the main cylinder 10 through the plurality of vibration dampers 511. When the first cylinder 20 or the second cylinder 30 is impacted by the gas and vibrates, the vibration will be suppressed or absorbed by the plurality of vibration dampers 511 (especially reciprocating vibration in the radial direction), which can reduce the energy of the direct impact on the main cylinder 10, thereby suppressing the vibration of the compressor and the exhaust pipeline caused by the airflow pulsation (the compressor and the exhaust pipeline are both connected to the main cylinder 10).

[0068] See also Figure 2 and Figure 5 In combination with the above embodiments, in some embodiments, the shock absorber 511 is tilted relative to the radial direction of the first cylinder 20.

[0069] It can be understood that the shock absorber 511 is a metal structure and can be tilted when it is set between the first cylinder 20 and the main cylinder 10. On the one hand, the tilted shock absorber 511 can keep it in a tensile state and can always generate tension on the first cylinder 20 (multiple shock absorbers 511 generate tension on the first cylinder 20 from different directions, thereby maintaining the balance of the first cylinder 20), and can quickly suppress the vibration generated on the first cylinder 20; on the other hand, tilting the shock absorber 511 can reduce the distance between the main cylinder 10 and the first cylinder 20, so that when processing the main cylinder 10, the radial dimension of the main cylinder 10 can be set smaller, reducing the volume of the entire sound-absorbing and vibration-reducing device and reducing space occupancy.

[0070] See also Figure 2 In combination with the above embodiments, in some embodiments, the buffer assembly 50 also includes a bellows portion 52, which is respectively connected to the first cylinder 20 and the main cylinder 10, and the bellows portion 52 has an air flow channel 521, which is respectively connected to the air inlet 12 and the diversion cavity 31.

[0071] It is understandable that a bellows portion 52 may be further connected between the first cylinder 20 and the main cylinder 10, and the air inlet 12 and the diverter cavity 31 may be communicated through the air flow channel 521 in the bellows portion 52. The gas discharged from the compressor may enter the diverter cavity 31 through the air inlet 12 and the air flow channel 521. The bellows portion 52 is a metal structure. When the gas impacts the first cylinder 20, the second cylinder 30 and other structures, vibrations will occur. The vibrations will be suppressed or absorbed by the bellows portion 52 (especially the reciprocating vibrations in the axial direction), which can reduce the energy of the direct impact on the main cylinder 10, thereby suppressing the vibration of the compressor and the exhaust pipe caused by air flow pulsation.

[0072] See also Figure 6 and Figure 7 In combination with the above embodiments, in some embodiments, the main cylinder 10 has an air outlet 13; the sound-absorbing and vibration-reducing device includes a flow stabilizing component 60, which is located between the air outlet 13 and the first cylinder 20 and is connected to the main cylinder 10. The flow stabilizing component 60 has a flow stabilizing chamber 61 connected to the air inlet 12, and a plurality of first perforations 62 connected to the flow stabilizing chamber 61. The flow stabilizing chamber 61 is connected to the buffer chamber 11 through the plurality of first perforations 62.

[0073] It is understood that a flow stabilization assembly 60 is provided within the buffer chamber 11. The gas in the buffer chamber 11 can enter the flow stabilization chamber 61 through the multiple first perforations 62 on the flow stabilization assembly 60, and then be discharged into the exhaust pipe through the outlet 13 connected to the flow stabilization chamber 61. The multiple first perforations 62 can stabilize the passing airflow. When the sound waves generated by the airflow pass through the multiple first perforations 62, they come into contact with the inner walls of the first perforations 62, generating friction and reflection, thereby consuming some sound energy and reducing high-frequency noise.

[0074] See also Figure 6 and Figure 7 In combination with the above embodiments, in some embodiments, the flow stabilizing assembly 60 includes a plurality of sealing plates 63 and a first flow stabilizing plate 64 .

[0075] A plurality of sealing plates 63 are arranged at intervals along the axial direction of the first cylinder 20 and are connected to the main cylinder 10. A first flow stabilizing plate 64 is connected to the main cylinder 10 and the plurality of sealing plates 63, respectively. The first flow stabilizing plate 64, the main cylinder 10, and the plurality of sealing plates 63 enclose a flow stabilizing chamber 61. The first flow stabilizing plate 64 is provided with a plurality of first perforations 62. The plurality of first perforations 62 are located on one side of the first cylinder 20 in the radial direction and are spaced apart from the first cylinder 20.

[0076] It is understandable that the number of sealing plates 63 can be two, which are arranged at intervals along the axial direction of the first cylinder 20 and connected to the main cylinder 10 to form the two side walls of the steady flow chamber 61. The first steady flow plate 64 overlaps the top of the two sealing plates 63 to form the top wall of the steady flow chamber 61. A part of the main cylinder 10 serves as the bottom wall of the steady flow chamber 61, and together with the two sealing plates 63 and the first steady flow plate 64, forms the steady flow chamber 61. The multiple first perforations 62 on the first steady flow plate 64 are located on one side of the first cylinder 20 in the radial direction, and are staggered with the position of the gas discharged from the counter-chamber 32, so that the gas discharged from the counter-chamber 32 impacts the main cylinder 10 (the impact force of the gas discharged from the counter-chamber 32 is smaller), rather than directly facing the multiple first perforations 62. This can further reduce the impact force of the gas, so that the gas in the buffer chamber 11 passes through the multiple first perforations 62 at a smaller flow rate, which is conducive to stabilizing the flow of the gas.

[0077] See also Figure 6 and Figure 8 In combination with the above embodiments, in some embodiments, the flow stabilizing assembly 60 includes a second flow stabilizing plate 65, which is located in the flow stabilizing chamber 61 and is respectively connected to the main cylinder 10 and multiple sealing plates 63. The second flow stabilizing plate 65 has multiple second perforations 651. The second flow stabilizing plate 65 is used to separate the flow stabilizing chamber 61 into a first cavity 611 and a second cavity 612. The first cavity 611 and the second cavity 612 are arranged at intervals along the direction from the first cylinder 20 to the first flow stabilizing plate 64. The first cavity 611 is connected to the second cavity 612 through multiple second perforations 651. The first cavity 611 is connected to the buffer chamber 11 through multiple first perforations 62, and the second cavity 612 is connected to the air inlet 12.

[0078] It can be understood that a second flow stabilizing plate 65 can be set inside the flow stabilizing chamber 61, and the second flow stabilizing plate 65 divides the flow stabilizing chamber 61 into a first cavity 611 and a second cavity 612. At the same time, a plurality of second perforations 651 are set on the second flow stabilizing plate 65. After the gas in the buffer chamber 11 enters the first cavity 611 through the plurality of first perforations 62, the gas in the first cavity 611 can enter the second cavity 612 through the plurality of second perforations 651. The gas can be stabilized again through the plurality of second perforations 651. The sound waves generated by the airflow come into contact with the inner wall of the second cavity 612 when passing through the plurality of second cavities 612, which will generate friction and reflection, thereby further consuming part of the sound energy and reducing high-frequency noise.

[0079] The number of second flow stabilizing plates 65 in the flow stabilizing chamber 61 can be multiple, and the multiple second flow stabilizing plates 65 can be arranged at intervals along the direction from the first cylinder 20 to the first flow stabilizing plate 64. Each second flow stabilizing plate 65 is provided with multiple second perforations 651. The gas flow is stabilized by the multiple second flow stabilizing plates 65, and the sound energy can be consumed multiple times to reduce noise.

[0080] See also Figure 8 In combination with the above embodiments, in some embodiments, the first through-hole 62 and the second through-hole 651 are staggered along the direction from the first flow stabilizing plate 64 to the second flow stabilizing plate 65 .

[0081] It can be understood that when the gas in the buffer chamber 11 passes through the multiple first perforations 62, since the multiple first perforations 62 and the multiple second perforations 651 are staggered with each other, the gas will impact the second flow stabilizer 65 instead of directly passing through the multiple second perforations 651. Therefore, due to the obstruction of the second flow stabilizer 65, the flow rate and pulsation of the gas can be further suppressed, thereby reducing the impact force of the gas, reducing vibration and noise.

[0082] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0083] The above is a detailed introduction to the noise reduction and vibration reduction device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core ideas of the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A noise reduction and vibration reduction device, characterized in that: include: The main cylinder (10) has a buffer chamber (11) and an air inlet (12); A first cylinder (20) is disposed in the buffer chamber (11); The second cylinder (30) is arranged in the first cylinder (20), and a diverter cavity (31) is formed between the second cylinder (30) and the first cylinder (20), and the diverter cavity (31) is communicated with the air inlet (12). The second cylinder (30) forms a counter-punch cavity (32), and the counter-punch cavity (32) is communicated with the buffer cavity (11). The second cylinder (30) has at least one counter-punch hole group (33), and the counter-punch hole group (33) includes two oppositely arranged counter-punch holes (331), and the counter-punch holes (331) are respectively communicated with the diverter cavity (31) and the counter-punch cavity (32). The counter-punch holes (331) are used to discharge the gas in the diverter cavity (31) into the counter-punch cavity (32).

2. The noise reduction and vibration reduction device according to claim 1, characterized in that: The first cylinder (20) and the second cylinder (30) are spaced apart; the noise reduction and vibration reduction device further comprises: A connecting piece (40) is disposed in the buffer chamber (11) and is connected to the first cylinder (20) and the second cylinder (30) respectively. The connecting piece (40) is used to separate the diversion chamber (31) and the buffer chamber (11).

3. The noise reduction and vibration reduction device according to claim 2, characterized in that: The connecting member (40) has an arcuate surface (41), and the arcuate surface (41) is arranged toward the diversion cavity (31).

4. The noise reduction and vibration reduction device according to claim 2, characterized in that: The first cylinder (20) comprises: an expansion portion (21) connected to the main cylinder (10), the expansion portion (21) having an opening (211) communicating with the air inlet (12), the expansion portion (21) having a first size L1, and the first size L1 gradually increasing in a direction from the air inlet (12) to the opening (211); The first housing portion (22) is connected to a side of the expansion portion (21) facing away from the air inlet (12), and the side of the first housing portion (22) facing away from the expansion portion (21) is connected to the connecting member (40).

5. The noise reduction and vibration reduction device according to claim 2, characterized in that: The second cylinder (30) comprises: A second housing portion (34) is connected to the connecting member (40), and a plurality of the punching holes (331) are arranged at intervals along the circumference of the second housing portion (34); The guide portion (35) is connected to a side of the second shell portion (34) facing the air inlet (12), and the guide portion (35) has a second size L2. The second size L2 gradually increases from the guide portion (35) to the second shell portion (34).

6. The noise reduction and vibration reduction device according to claim 1, characterized in that: The noise reduction and vibration reduction device further comprises: A buffer assembly (50) is disposed in the buffer cavity (11) and is connected to the main cylinder (10) and the first cylinder (20) respectively. The buffer assembly (50) is used to reduce vibration of the first cylinder (20) and the second cylinder (30).

7. The noise reduction and vibration reduction device according to claim 6, characterized in that: The buffer assembly (50) comprises: A plurality of vibration damping groups (51) are arranged at intervals along the axial direction of the first cylinder (20); the vibration damping groups (51) include a plurality of vibration dampers (511); and the plurality of vibration dampers (511) are arranged at intervals along the circumferential direction of the first cylinder (20).

8. The noise reduction and vibration reduction device according to claim 7, characterized in that: The vibration damper (511) is arranged to be inclined relative to the radial direction of the first cylinder (20).

9. The noise reduction and vibration reduction device according to claim 6 or 7, characterized in that: The buffer assembly (50) further includes: The bellows portion (52) is connected to the first cylinder (20) and the main cylinder (10), respectively. The bellows portion (52) has an air flow channel (521), and the air flow channel (521) is communicated with the air inlet (12) and the diversion cavity (31), respectively.

10. The noise reduction and vibration reduction device according to claim 1, characterized in that: The main cylinder (10) has an air outlet (13); the noise reduction and vibration reduction device comprises: A flow stabilizing component (60) is located between the air outlet (13) and the first cylinder (20), and is connected to the main cylinder (10). The flow stabilizing component (60) has a flow stabilizing chamber (61) connected to the air inlet (12), and a plurality of first perforations (62) connected to the flow stabilizing chamber (61). The flow stabilizing chamber (61) is connected to the buffer chamber (11) through the plurality of first perforations (62).

11. The noise reduction and vibration reduction device according to claim 10, characterized in that: The flow stabilizing component (60) comprises: a plurality of sealing plates (63), the plurality of sealing plates (63) being arranged at intervals along the axial direction of the first cylinder (20) and connected to the main cylinder (10); A first flow stabilizing plate (64) is respectively connected to the main cylinder (10) and the plurality of sealing plates (63); the first flow stabilizing plate (64), the main cylinder (10) and the plurality of sealing plates (63) enclose the flow stabilizing chamber (61); a plurality of first through-holes (62) are provided on the first flow stabilizing plate (64); the plurality of first through-holes (62) are located on one side of the first cylinder (20) in the radial direction and are spaced apart from the first cylinder (20).

12. The noise reduction and vibration reduction device according to claim 11, characterized in that: The flow stabilizing component (60) comprises: A second flow stabilizing plate (65) is located in the flow stabilizing chamber (61) and is respectively connected to the main cylinder (10) and the plurality of sealing plates (63). The second flow stabilizing plate (65) has a plurality of second perforations (651). The second flow stabilizing plate (65) is used to separate the flow stabilizing chamber (61) into a first cavity (611) and a second cavity (612). The first cavity (611) and the second cavity (612) are arranged at intervals along the direction from the first cylinder (20) to the first flow stabilizing plate (64). The first cavity (611) is connected to the second cavity (612) through the plurality of second perforations (651). The first cavity (611) is connected to the buffer chamber (11) through the plurality of first perforations (62). The second cavity (612) is connected to the air inlet (12).

13. The noise reduction and vibration reduction device according to claim 12, characterized in that: Along the direction from the first flow stabilizing plate (64) to the second flow stabilizing plate (65), the first through-hole (62) and the second through-hole (651) are staggered.

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