Compressor exhaust silencer

Abstract

The utility model belongs to the technical field of silencing, and provides a compressor exhaust silencer which comprises a shell and a silencing mechanism arranged in the shell, an air inlet pipe is arranged at one end of the shell, an air outlet pipe is arranged at the other end of the shell, the silencing mechanism comprises a diffuser pipe and a resistive silencing pipe, one end of the diffuser pipe is communicated with the air inlet pipe, and the other end of the diffuser pipe extends towards the interior of the shell. A plurality of through holes are formed in the side wall, arranged at one end of the shell, in the diffuser pipe at intervals, one end of the resistive silencing pipe communicates with the air outlet pipe, and the other end of the resistive silencing pipe extends towards the diffuser pipe. According to the exhaust silencer of the compressor, the porous diffuser pipe and the resistive silencing pipe are arranged in the shell, after high-pressure and high-speed gas enters the porous diffuser pipe, high-speed gas flow surge can be reduced, the silencing amount can be increased, then high-pressure and low-speed gas flow enters the resistive silencing pipe to counteract the gas flow volume, in other words, the two-time noise reduction process is carried out, and the noise reduction efficiency is improved. The silencer has the characteristics of simple structure and good silencing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of silencing devices, and particularly relates to a compressor exhaust silencer. Background Art

[0002] Air compressors are widely used mechanical equipment and are power equipment commonly used in all walks of life. At present, the market has higher and higher requirements for the quality of compressed air. Many applications require oil-free compressed air, and the demand for oil-free compressors has increased significantly. The market demand for dry oil-free compressors has increased. The main engine of a dry oil-free screw compressor generally has a high rotational speed of 10,000 - 30,000 rpm, with high gas flow velocity and high noise. Moreover, current environmental protection requirements are higher than before, and special attention is paid to noise requirements. Designing and developing a silencer with strong silencing ability can greatly improve the quality of the machine.

[0003] Currently, the silencers used in dry oil-free screw machines are basically Venturi tubes, and the effect of reducing air flow noise by changing the diameter to change the gas flow velocity is not obvious.

[0004] The technical problem to be solved by this application is: how to provide a compressor exhaust silencer with a simple structure and good silencing effect. Content of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a compressor exhaust silencer, which has the characteristics of a simple structure and good silencing effect.

[0006] The technical solution adopted by the utility model is: a compressor exhaust silencer, including a housing and a silencing mechanism disposed inside the housing. An air inlet pipe is provided at one end of the housing, and an air outlet pipe is provided at the other end. The silencing mechanism includes a diffuser pipe and a resistive silencing pipe. One end of the diffuser pipe is communicated with the air inlet pipe, and the other end extends towards the inside of the housing. A plurality of through holes are spacedly provided on the side wall of the housing at one end where the diffuser pipe is disposed inside. One end of the resistive silencing pipe is communicated with the air outlet pipe, and the other end extends towards the diffuser pipe.

[0007] For the compressor exhaust silencer of this application, by providing a porous diffuser pipe and a resistive silencing pipe inside the housing, after high-pressure and high-speed gas enters the porous diffuser pipe, the surging of the high-speed air flow can be reduced and the silencing volume can be increased. Then, the high-pressure and low-speed air flow enters the resistive silencing pipe to cancel out the air flow volume, that is, noise reduction is carried out twice, and it has the characteristics of a simple structure and good silencing effect.

[0008] In some embodiments, the end of the diffuser pipe away from the air inlet pipe is a closed structure.

[0009] By adopting the above technical solution, the air flow can be forced to change the flow direction inside the diffuser pipe, so that the air flow reduces the flow velocity surging and increases the silencing volume inside the diffuser pipe.

[0010] In some embodiments, one end of the diffuser tube away from the intake pipe abuts against the inner wall of the housing; or

[0011] A cover is provided at one end of the diffuser tube away from the intake pipe.

[0012] By adopting the above technical solution, the diffuser tube can be made to abut against the inner wall of the housing as needed, or a cover can be provided to close the end of the diffuser tube.

[0013] In some embodiments, the number of resistive silencer tubes is at least one, and the resistive silencer tubes are arranged at intervals between the diffuser tube and the outlet pipe.

[0014] By adopting the above technical solution, the number of resistive silencer tubes can be increased or decreased according to actual needs.

[0015] In some embodiments, the outer wall of the resistive silencer tube is filled with sound insulation material.

[0016] By adopting the above technical solution, the sound insulation material can block the transmission of sound and vibration, improving the noise reduction effect.

[0017] In some embodiments, a first buffer chamber and a second buffer chamber are provided inside the housing. The first buffer chamber is provided at one end of the housing close to the intake pipe, the diffuser tube is placed inside the first buffer chamber, and the second buffer chamber is provided between the resistive silencer tube and the outlet pipe.

[0018] By adopting the above technical solution, the first buffer chamber can reduce the flow rate of the air flow flowing out of the diffuser tube, buffer the air flow, and then make the air flow more evenly distributed to each resistive silencer tube for secondary sound absorption. The second buffer chamber can also reduce the flow rate of the air flow flowing out of the resistive silencer tube, reduce air flow surging, and at the same time guide the air flow into the outlet pipe and discharge it outside the housing.

[0019] In some embodiments, a sensor interface is provided on the side wall of the intake pipe.

[0020] By adopting the above technical solution, sensors for detecting the temperature and pressure of the gas can be installed on the sensor interface, so as to intuitively understand the temperature and pressure of the air flow entering the muffler and facilitate the operator's understanding of the equipment status.

[0021] In some embodiments, an intake flange is provided at one end of the intake pipe away from the diffuser tube, and an outlet flange is provided at one end of the outlet pipe away from the resistive silencer tube.

[0022] By adopting the above technical solution, the intake flange and the outlet flange can facilitate the connection of the muffler to the pipeline.

[0023] In some embodiments, the axis of the intake pipe and the axis of the outlet pipe are arranged at an angle.

[0024] By adopting the above technical solution, the intake pipe and the exhaust pipe are arranged at an angle, which can increase the resistance of the air flow flowing through the muffler, thereby prolonging the duration of the air flow flowing through the inside of the muffler and improving the sound reduction and noise reduction effect.

[0025] In some embodiments, a sound insulation layer is provided on the inner side and / or the outer side of the housing.

[0026] By adopting the above technical solution, the noise reduction effect can be improved. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a compressor exhaust muffler according to a preferred embodiment of the present invention;

[0028] Figure 2 is Figure 1 a schematic cross-sectional structural diagram of the compressor exhaust muffler shown along the line A-A.

[0029] In the figure: 100, compressor exhaust muffler; 10, housing; 11, intake pipe; 12, exhaust pipe; 13, first buffer chamber; 14, second buffer chamber; 15, sensor interface; 16, intake flange; 17, exhaust flange; 20, silencing mechanism; 21, diffuser pipe; 22, resistive silencing pipe; 23, sound insulation material. Detailed Embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When the number of an element is referred to as having "a plurality", it can be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] Please refer to Figures 1 to 2 , which is a compressor exhaust silencer 100 of a preferred embodiment of this utility model, including a housing 10 and a silencing mechanism 20 disposed inside the housing 10. An intake pipe 11 is provided at one end of the housing 10, and an exhaust pipe 12 is provided at the other end. The silencing mechanism 20 includes a diffuser pipe 21 and a resistive silencing pipe 22. One end of the diffuser pipe 21 is communicated with the intake pipe 11, and the other end extends toward the inside of the housing 10. A plurality of through holes are provided at intervals on the side wall of the housing 10 where the diffuser pipe 21 is disposed inside. One end of the resistive silencing pipe 22 is communicated with the exhaust pipe 12, and the other end extends toward the diffuser pipe 21.

[0034] Preferably, the end of the diffuser pipe 21 away from the intake pipe 11 is a closed structure. The structure with one end closed can prompt the air flow to change the flow direction inside the diffuser pipe 21, so that the air flow reduces the flow velocity and surges inside the diffuser pipe 21 and improves the silencing volume.

[0035] Optionally, the end of the diffuser pipe 21 away from the intake pipe 11 abuts against the inner wall of the housing 10; or a cover is provided at the end of the diffuser pipe 21 away from the intake pipe 11. The diffuser pipe 21 can be made to abut against the inner wall of the housing 10 as needed, or a cover can be provided to achieve the closure of the end of the diffuser pipe 21.

[0036] Further, when a cover is provided at the end of the diffuser pipe 21 away from the intake pipe 11, a plurality of through holes can be provided in the cover.

[0037] Optionally, the number of resistive silencing pipes 22 is at least one, and the resistive silencing pipes 22 are arranged at intervals between the diffuser pipe 21 and the exhaust pipe 12. The number of resistive silencing pipes 22 can be increased or decreased according to actual needs.

[0038] Further, since a plurality of small holes are provided in the pipe wall of the resistive silencing pipe 22, in order to improve the silencing effect, a sound insulation material 23 is filled on the outer wall of the resistive silencing pipe 22, that is, the sound insulation material 23 is filled between two adjacent resistive silencing pipes 22 and / or between the resistive silencing pipe 22 and the inner wall of the housing 10. The sound insulation material 23 can block the transmission of sound and vibration and improve the noise reduction effect.

[0039] Optionally, the sound insulation material 23 is rock wool, and one or more materials such as polyester fiber, glass fiber, plant fiber, foam, plastic, porous ceramic, etc. can also be selected as the sound insulation material 23.

[0040] As shown Figure 2 in FIG. 1, inside the housing 10, there are a first buffer chamber 13 and a second buffer chamber 14. The first buffer chamber 13 is disposed at one end of the housing 10 close to the intake pipe 11. The diffuser pipe 21 is disposed inside the first buffer chamber 13. The second buffer chamber 14 is disposed between the resistive muffler pipe 22 and the outlet pipe 12. The first buffer chamber 13 can reduce the flow rate of the air flow flowing out of the diffuser pipe 21, buffer the air flow, and then make the air flow more evenly distributed to each resistive muffler pipe 22 for secondary sound attenuation. The second buffer chamber 14 can also reduce the flow rate of the air flow flowing out of the resistive muffler pipe 22, reduce the air flow surging, and at the same time can guide the air flow into the outlet pipe 12 and discharge it outside the housing 10.

[0041] Preferably, a sensor interface 15 is provided on the side wall of the intake pipe 11. The sensor interface 15 can be installed with sensors for detecting the temperature and pressure of the gas, so as to intuitively understand the temperature and pressure of the air flow entering the muffler, and facilitate the operator to understand the state of the equipment.

[0042] As shown Figure 1 in FIG. 2, in order to facilitate the connection of the muffler of the present application to an external pipeline, an intake flange 16 is provided at one end of the intake pipe 11 away from the diffuser pipe 21, and an outlet flange 17 is provided at one end of the outlet pipe 12 away from the resistive muffler pipe 22.

[0043] Optionally, the axis of the intake pipe 11 and the axis of the outlet pipe 12 are arranged at an angle. The intake pipe 11 and the outlet pipe 12 are arranged at an angle, which can increase the resistance of the air flow flowing in the muffler, thereby prolonging the duration of the air flow flowing inside the muffler and improving the sound reduction and noise reduction effect.

[0044] As shown Figure 2 in FIG. 3, in this embodiment, the axis of the intake pipe 11 is perpendicular to the axis of the housing 10, the axis of the outlet pipe 12 is coaxial with the axis of the housing 10, and the axes of the resistive muffler pipes 22 are parallel to the axis of the housing 10.

[0045] In other embodiments, according to the actual installation requirements, the axes of the intake pipe 11, the outlet pipe 12, the diffuser pipe 21 and the resistive muffler pipes 22 can be set to be parallel to the axis of the housing 10.

[0046] Preferably, a sound insulation layer is provided on the inner side and / or the outer side of the housing 10. By providing a sound insulation layer on the side wall of the housing 10, the noise reduction effect can be improved.

[0047] The compressor exhaust muffler 100 of the present application is provided with a porous diffuser tube 21 and a resistive muffler tube 22 inside the housing 10. After the high-pressure and high-speed gas enters the porous diffuser tube 21, the surging of the high-speed air flow can be reduced and the muffling volume can be increased. Then, the high-pressure and low-speed air flow enters the resistive muffler tube 22 to cancel out the air flow volume, that is, noise reduction is carried out twice, and it has the characteristics of simple structure and good muffling effect.

[0048] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention 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 perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A compressor exhaust muffler, comprising a housing (10) and a muffler mechanism (20) built into the housing (10), characterized in that: An air inlet pipe (11) is arranged at one end of the shell (10), and an air outlet pipe (12) is arranged at the other end. The muffler mechanism (20) comprises a diffuser pipe (21) and a resistive muffler pipe (22). One end of the diffuser pipe (21) is connected to the air inlet pipe (11), and the other end extends toward the inside of the shell (10). The diffuser pipe (21) is built into the side wall of one end of the shell (10) and is provided with a plurality of through holes at intervals. One end of the resistive muffler pipe (22) is connected to the air outlet pipe (12), and the other end extends toward the diffuser pipe (21). The outer wall of the resistive muffler pipe (22) is filled with a sound insulation material (23).

2. The compressor exhaust muffler according to claim 1, characterized in that: The end of the diffuser pipe (21) away from the air intake pipe (11) is a closed structure.

3. The compressor exhaust muffler according to claim 2, characterized in that: One end of the diffuser pipe (21) away from the air inlet pipe (11) abuts against the inner wall of the shell (10); or A sealing cover is provided at one end of the diffuser pipe (21) away from the air inlet pipe (11).

4. The compressor exhaust muffler according to claim 1, characterized in that: The number of the resistive silencer pipe (22) is at least one, and each of the resistive silencer pipes (22) is arranged at intervals between the diffuser pipe (21) and the air outlet pipe (12).

5. The compressor exhaust muffler according to claim 1, characterized in that: A first buffer chamber (13) and a second buffer chamber (14) are provided inside the shell (10); the first buffer chamber (13) is provided at one end of the shell (10) close to the air inlet pipe (11); the diffuser pipe (21) is built into the first buffer chamber (13); and the second buffer chamber (14) is provided between the resistive silencer pipe (22) and the air outlet pipe (12).

6. The compressor exhaust muffler according to claim 1, characterized in that: A sensor interface (15) is provided on the side wall of the air intake pipe (11).

7. The compressor exhaust muffler according to claim 1, characterized in that: An air inlet flange (16) is provided at one end of the air inlet pipe (11) away from the diffuser pipe (21), and an air outlet flange (17) is provided at one end of the air outlet pipe (12) away from the resistive silencer pipe (22).

8. The compressor exhaust muffler according to claim 1, characterized in that: The axis of the air inlet pipe (11) and the axis of the air outlet pipe (12) are arranged to form an angle.

9. The compressor exhaust muffler according to claim 1, characterized in that: A sound insulation layer is provided on the inner side and / or the outer side of the housing (10).

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