Exhaust silencer for air compressor
By designing adjustable tilt angle inner and outer windward surfaces and energy-consuming mechanisms, the problem of limited noise reduction performance caused by the fixed structure of the air compressor silencer was solved, achieving active adjustment according to frequency and better noise reduction effect.
Patent Information
- Application Number
- CN202421095235.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing air compressor silencers have fixed structural dimensions and cannot be actively adjusted according to the operating frequency of the air compressor, which limits their noise reduction performance and makes it difficult to achieve both miniaturization and maximum noise reduction effect.
Design an exhaust silencer for air compressors, comprising a silencing inner cavity and an outer shell, with the inner and outer windward surfaces connected by a linkage rod, capable of automatically adjusting the tilt angle. Combined with an energy-consuming mechanism and sound-absorbing cotton, it achieves airflow resonance energy consumption and adapts to different operating frequencies.
It achieves active adjustment based on the air compressor frequency, enhances the noise reduction effect, increases the airflow distance and resonance energy consumption, and enhances the practicality and noise reduction performance of the silencer.
Smart Images
Figure CN222350904U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of air compressor accessories, in particular to an exhaust muffler for an air compressor. Background Art
[0002] In the related art, the silencer structure is constructed as a silencer. Among them, the silencer mainly uses structural optimization to hinder the airflow and consume energy to reduce the flow rate of the airflow, thereby reducing the noise generated by the friction between the airflow and the surrounding. In the prior art, the silencer performance of a conventional silencer is affected by its structural dimensions, and once the structural dimensions of the silencer are determined, its silencer band and silencer performance are also fixed, and cannot be actively adjusted according to the operating frequency of the air compressor. At this time, the conventional solution of the prior art is usually to cope with different airflows generated by different operating frequencies through a multi-cavity combination, so as to obtain a better silencer effect. However, when a multi-cavity combination is used to achieve broadband silencer, it is impossible to take into account both the miniaturization of the silencer and the maximization of the silencer effect, so there is room for improvement. Utility Model Content
[0003] Based on this, in order to solve the problem that the muffler in the prior art cannot be adjusted, the utility model provides an exhaust muffler for an air compressor, and its specific technical solution is as follows:
[0004] An exhaust silencer for an air compressor comprises a silencer inner cavity and a silencer outer shell sleeved on the outside of the silencer inner cavity, the silencer inner cavity comprises a front end cover and a rear end cover arranged in sequence, a plurality of connecting rings and a plurality of energy consuming mechanisms are connected between the front end cover and the rear end cover at intervals, the energy consuming mechanisms comprise an inner windward surface hinged in the silencer inner cavity, an outer windward surface hinged outside the silencer inner cavity, and a linkage rod connected between the inner windward surface and the outer windward surface, the inner windward surface is arranged obliquely toward the front end cover, and the outer windward surface is inclined toward the rear end cover.
[0005] The above-mentioned exhaust silencer for an air compressor can automatically adjust the inclination angles of the inner windward surface and the outer windward surface as the air pressure in the silencer inner cavity and the silencer outer shell changes, and can be actively adjusted according to the operating frequency of the air compressor, thereby producing an effective resonance energy-consuming silencer effect on the airflow, and has good practicality.
[0006] Furthermore, an air outlet is provided on the silencer shell, and the air outlet is provided close to one side of the front end cover. At this time, the air flow direction is to enter the silencer inner cavity along the front end cover, then flow out from the rear end cover into the silencer shell, and flow toward the air outlet in the silencer shell along the opposite flow direction to that in the silencer inner cavity and flow out from the air outlet.
[0007] Furthermore, the energy dissipation mechanism also includes an annular substrate, which is evenly provided with a plurality of air holes in the circumference thereof, the inner windward surface and the outer windward surface are correspondingly provided with a plurality of air holes and are respectively connected one-to-one to the two ends of the air holes, there are also a plurality of linkage rods, and the plurality of linkage rods pass through the air holes one-to-one and are respectively connected to the corresponding inner windward surface and the outer windward surface.
[0008] Furthermore, the leeward side of the inner windward surface and the leeward side of the outer windward surface are both sealed and connected to the air hole via a sealing structure.
[0009] Furthermore, the sealing structure is a bellows.
[0010] Furthermore, one end of the linkage rod is connected to the edge of the inner windward surface away from the silencer inner cavity, and the other end of the linkage rod is connected to the edge of the outer windward surface away from the silencer inner cavity.
[0011] Furthermore, the ends of the linkage rods are connected with fork-shaped structures, and the corresponding bifurcation points of the fork-shaped structures are evenly connected to the edge of the inner windward surface away from the silencer inner cavity and to the edge of the outer windward surface away from the silencer inner cavity.
[0012] Furthermore, the sound-absorbing shell is filled with sound-absorbing cotton.
[0013] Furthermore, the silencer cotton is arranged on the inner wall of the silencer shell, and the thickness of the silencer cotton on the inner wall of the silencer shell corresponding to the rear end cover is twice or more the thickness of the silencer cotton on the gas inner wall of the silencer shell.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. With the change of air pressure in the silencer inner cavity and the silencer outer shell, the inclination angle of the inner windward surface and the outer windward surface can be automatically adjusted, and it can be actively adjusted according to the operating frequency of the air compressor, thereby producing an effective resonance energy-consuming silencer effect on the airflow, which has good practicality.
[0016] 2. By setting up the silencer shell, the flow distance of the airflow discharged from the air compressor in the silencer is increased, and in combination with the energy dissipation mechanism, the airflow in the silencer inner cavity can be better resonated and dissipated according to the airflow in the silencer shell, thereby obtaining a better silencer effect.
[0017] 3. By arranging silencer cotton to absorb energy and silence the airflow in the silencer shell, and at the same time thickening the thickness of the silencer cotton on the inner wall of the silencer shell corresponding to the rear end cover, the impact force of the airflow through the rear end cover on the silencer shell can be effectively dealt with. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.
[0019] Figure 1 It is a structural schematic diagram of an exhaust muffler for an air compressor in an embodiment of the utility model.
[0020] Figure 2 It is a structural schematic diagram of an energy dissipation mechanism of an exhaust silencer for an air compressor in an embodiment of the utility model.
[0021] Description of reference numerals:
[0022] 100, silencer inner cavity; 110, front end cover; 120, connecting ring; 131, inner windward surface; 132, outer windward surface; 133, linkage rod; 134, annular base plate; 135, air hole; 136, sealing structure; 140, rear end cover; 200, silencer outer shell; 210, air outlet; 220, silencer cotton. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0025] refer to Figure 1 as well as Figure 2As shown, an exhaust silencer for an air compressor comprises a silencer inner cavity 100 and a silencer outer shell 200 sleeved on the outside of the silencer inner cavity 100, the silencer inner cavity 100 comprises a front end cover 110 and a rear end cover 140 arranged in sequence, a plurality of connecting rings 120 and a plurality of energy dissipation mechanisms are connected between the front end cover 110 and the rear end cover 140 at intervals, the energy dissipation mechanism comprises an inner windward surface 131 hinged in the silencer inner cavity 100, an outer windward surface 132 hinged outside the silencer inner cavity 100, and a linkage rod 133 connected between the inner windward surface 131 and the outer windward surface 132, the inner windward surface 131 is inclined toward the front end cover 110, and the outer windward surface 132 is inclined toward the rear end cover 140.
[0026] The above-mentioned exhaust silencer for an air compressor can automatically adjust the inclination angles of the inner windward surface 131 and the outer windward surface 132 as the air pressure in the silencer inner cavity 100 and the silencer outer shell 200 changes, and can be actively adjusted according to the operating frequency of the air compressor, thereby producing an effective resonance energy-consuming silencer effect on the airflow, and has good practicality.
[0027] In one specific embodiment, the silencer housing 200 is provided with an air outlet 210, and the air outlet 210 is provided near one side of the front cover 110. At this time, the airflow direction is to enter the silencer inner cavity 100 along the front cover 110, then flow out from the rear cover 140 into the silencer housing 200, and flow toward the air outlet 210 in the silencer housing 200 along the opposite flow direction in the silencer inner cavity 100 and flow out from the air outlet 210. By providing the silencer housing 200, the flow distance of the airflow discharged by the air compressor in the silencer is increased, and in combination with the energy dissipation mechanism, the airflow in the silencer inner cavity 100 can be better resonated and dissipated according to the airflow in the silencer housing 200, thereby obtaining a better silencer effect.
[0028] In one specific embodiment, the energy dissipation mechanism further includes an annular base plate 134, and a plurality of air holes 135 are evenly opened in the circumferential direction of the annular base plate 134. The inner windward surface 131 and the outer windward surface 132 are correspondingly provided with a plurality of air holes 135, and are respectively connected to the two ends of the air holes 135 in a one-to-one correspondence. There are also a plurality of linkage rods 133, and the plurality of linkage rods 133 pass through the air holes 135 in a one-to-one correspondence and are respectively connected to the corresponding inner windward surface 131 and the outer windward surface 132. This design can facilitate the assembly connection of the energy dissipation mechanism. Figure 1The figure shows that the energy dissipation mechanism has two symmetrically arranged air holes 135, two inner windward surfaces 131 and two outer windward surfaces 132, but this number is not limited in the actual production process and can be set according to actual needs. It is preferred to cover the entire annular base plate 134 while ensuring the strength of the connection structure, so as to achieve the maximum sound-absorbing effect. The figure is only for the convenience of observation and understanding.
[0029] In one specific embodiment, the leeward side of the inner windward surface 131 and the leeward side of the outer windward surface 132 are both sealedly connected to the air hole 135 via a sealing structure 136 .
[0030] Specifically, the sealing structure 136 is a bellows. The bellows makes the sealing structure 136 active and can expand and contract with the rotation of the inner windward surface 131 and the outer windward surface 132 to ensure the overall sealing performance.
[0031] In one specific embodiment, one end of the linkage rod 133 is connected to the edge of the inner windward surface 131 away from the silencer inner cavity 100 , and the other end of the linkage rod 133 is connected to the edge of the outer windward surface 132 away from the silencer inner cavity 100 .
[0032] In one specific embodiment, the ends of the linkage rod 133 are connected with fork-shaped structures (not shown in the figure), and the corresponding bifurcation points of the fork-shaped structures are evenly connected to the edge of the inner windward surface 131 away from the muffler inner cavity 100 and the edge of the outer windward surface 132 away from the muffler inner cavity 100. The design of the fork-shaped structure can enhance the overall connection strength, thereby making the force transmission process more stable, so as to better achieve the function of resonance energy dissipation and muffler.
[0033] In one specific embodiment, the sound-absorbing shell 200 is also filled with sound-absorbing cotton 220 .
[0034] Preferably, the sound-absorbing cotton 220 is arranged on the inner wall of the sound-absorbing shell 200, and the thickness of the sound-absorbing cotton 220 on the inner wall of the sound-absorbing shell 200 corresponding to the rear end cover 140 is twice or more the thickness of the sound-absorbing cotton 220 on the gas inner wall of the sound-absorbing shell 200. By arranging the sound-absorbing cotton 220 to absorb energy and silence the airflow in the sound-absorbing shell 200, and at the same time thickening the thickness of the sound-absorbing cotton 220 on the inner wall of the sound-absorbing shell 200 corresponding to the rear end cover 140, the impact force caused by the airflow passing through the rear end cover 140 on the sound-absorbing shell 200 can be effectively dealt with.
[0035] Working principle:
[0036] When the air compressor is working, high-speed airflow will pass through the silencer cavity 100. At this time, since the energy consumption mechanism is a movable mechanism, the inner windward surface 131 will move towards the direction away from the central axis of the silencer cavity 100 under the impact of the high-speed airflow, so as to increase the ventilation volume per unit area at the energy consumption mechanism. Under the linkage of the linkage rod 133, the outer windward surface 132 will move in the direction perpendicular to the central axis of the silencer cavity 100. However, since the air pressure in the silencer cavity 100 is relatively low at this time, the outer windward surface 132 will hinder this movement change, and then hinder the rotation of the inner windward surface 131 in the silencer cavity 100, thereby hindering the flow of airflow and generating stagnant airflow to collide with the subsequent high-speed airflow for energy consumption. The fast airflow will also hit the inner windward surface 131 to exert a force on it and make it continue to deflect, and resonant energy consumption is achieved in this reciprocating process. After the unobstructed airflow flows out through the rear end cover 140, a part of it hits the silencer cotton 220, and the other part continues to flow toward the air outlet 210 along the shape inside the silencer shell 200. During the flow, it will collide with the outer windward surface 132, thereby causing a situation similar to that in the silencer inner cavity 100. At this time, there is the same airflow inside and outside the silencer inner cavity 100. At this time, the energy consumption mechanism is used to continuously reciprocate to resonate and consume energy of the airflow. In the process of reciprocating movement of multiple telescopic ends, the airflow can be effectively consumed to achieve the effect of silencing, and finally discharged from the air outlet 210.
[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. An exhaust muffler for an air compressor, comprising a muffler inner cavity (100) and a muffler outer shell (200) sleeved outside the muffler inner cavity (100), characterized in that: The muffler inner cavity (100) comprises a front end cover (110) and a rear end cover (140) which are arranged in sequence, a plurality of connection rings (120) and a plurality of energy dissipation mechanisms are connected between the front end cover (110) and the rear end cover (140) at intervals, the energy dissipation mechanisms comprising an inner windward surface (131) hinged inside the muffler inner cavity (100), an outer windward surface (132) hinged outside the muffler inner cavity (100), and a linkage rod (133) connected between the inner windward surface (131) and the outer windward surface (132), the inner windward surface (131) being arranged to be inclined toward the front end cover (110), and the outer windward surface (132) being inclined toward the rear end cover (140).
2. The exhaust muffler for an air compressor according to claim 1, characterized in that: An air outlet (210) is provided on the silencer housing (200), and the air outlet (210) is provided close to one side of the front end cover (110). At this time, the airflow direction is to enter the silencer inner cavity (100) along the front end cover (110), then flow out from the rear end cover (140) into the silencer housing (200), and flow in the silencer housing (200) toward the air outlet (210) along the opposite flow direction to that in the silencer inner cavity (100), and flow out from the air outlet (210).
3. The exhaust muffler for an air compressor according to claim 2, characterized in that: The energy dissipation mechanism further comprises an annular base plate (134), a plurality of air holes (135) are uniformly provided on the circumference of the annular base plate (134), the inner windward surface (131) and the outer windward surface (132) are correspondingly provided with a plurality of air holes (135) which are respectively connected one-to-one to the two ends of the air holes (135), and the plurality of linkage rods (133) are also respectively passed through the air holes (135) and respectively connected to the corresponding inner windward surface (131) and the outer windward surface (132).
4. The exhaust muffler for an air compressor according to claim 3, characterized in that: The leeward side of the inner windward surface (131) and the leeward side of the outer windward surface (132) are both sealedly connected to the air hole (135) via a sealing structure (136).
5. The exhaust muffler for an air compressor according to claim 4, characterized in that: The sealing structure (136) is a bellows.
6. The exhaust muffler for an air compressor according to claim 2, characterized in that: One end of the linkage rod (133) is connected to the edge of the inner windward surface (131) away from the silencer inner cavity (100), and the other end of the linkage rod (133) is connected to the edge of the outer windward surface (132) away from the silencer inner cavity (100).
7. The exhaust muffler for an air compressor according to claim 6, characterized in that: The ends of the linkage rod (133) are connected with fork-shaped structures, and the corresponding bifurcation points of the fork-shaped structures are evenly connected to the edge of the inner windward surface (131) away from the silencer inner cavity (100) and to the edge of the outer windward surface (132) away from the silencer inner cavity (100).
8. The exhaust muffler for an air compressor according to claim 1, characterized in that: The sound-absorbing shell (200) is also filled with sound-absorbing cotton (220).
9. The exhaust muffler for an air compressor according to claim 8, characterized in that: The silencer cotton (220) is arranged on the inner wall of the silencer shell (200), and the thickness of the silencer cotton (220) on the inner wall of the silencer shell (200) corresponding to the rear end cover (140) is twice or more than the thickness of the silencer cotton (220) on the gas inner wall of the silencer shell (200).