Exhaust silencer and air compressor

Abstract

The utility model relates to an exhaust silencer and an air compressor. The exhaust silencer comprises a shell, a first cavity, a second cavity and a transition part, wherein the first cavity and the second cavity are formed in the shell, and the transition part is arranged between the first cavity and the second cavity. According to the exhaust silencer, the first cavity and the second cavity are formed in the shell, the diameter of the second cavity is smaller than that of the first cavity, the first cavity and the second cavity are connected through the transition part to form the silencing cavity, and the exhaust silencer is simple in structure, low in production cost, convenient to install and high in stability.

Description

Technical Field

[0001] The utility model relates to the field of automobile air compression equipment, in particular to an exhaust muffler and an air compressor. Background Art

[0002] As the core component of the air suspension system, the air compressor provides dry compressed air for the air suspension system and inputs the compressed air into the air tank or air spring to complete the horizontal adjustment of the vehicle body height.

[0003] During operation, the air compressor not only needs to inflate the air suspension system to increase the vehicle body height, but also needs to exhaust the air when it needs to lower the vehicle body height. However, the gas exhausted from the air suspension system is usually high-pressure gas, which will generate a lot of noise during the exhaust process, reducing the user's driving comfort. The existing exhaust muffler is large in size and needs to be pre-installed with a matching cavity for installation, which is inconvenient to install and has a high production cost. Utility Model Content

[0004] In view of this, the utility model provides an exhaust silencer and an air compressor by opening a first cavity and a second cavity in a shell, and the diameter of the second cavity is smaller than the diameter of the first cavity, and the first cavity and the second cavity are connected by a transition portion to form a silencer cavity, which has a simple structure, low production cost, easy installation, and strong stability.

[0005] The utility model solves the technical problem by adopting the following technical solution: an exhaust muffler is provided for an air compressor, wherein the exhaust muffler comprises a shell, a first cavity opened inside the shell, a second cavity, and a transition portion arranged between the first cavity and the second cavity.

[0006] Furthermore, the shell includes a mounting portion arranged at one end and a shell portion connected to the mounting portion, the mounting portion and the shell portion are an integrally formed structure, and the mounting portion is substantially cylindrical.

[0007] Furthermore, the shell portion is in a truncated cone shape, a bottom surface of the shell portion with a larger diameter is connected to the mounting portion, and a maximum diameter of the shell portion is smaller than a diameter of the mounting portion.

[0008] Furthermore, the central axis of the shell portion coincides with the central axis of the mounting portion.

[0009] Furthermore, the first cavity is substantially a truncated cone-shaped cavity, the upper end portion of the first cavity is opened through to the upper end surface of the mounting portion, and the lower end portion of the first cavity is opened to a lower position in the shell portion.

[0010] Furthermore, the central axis of the first cavity coincides with the central axis of the shell portion and the central axis of the mounting portion.

[0011] Furthermore, the diameter of the upper end of the first cavity is 2.5-3.5 mm, the diameter of the lower end of the first cavity is 2-3 mm, and the height of the first cavity is 13-17 mm.

[0012] Furthermore, the diameter of the upper end of the first cavity is 3 mm, the diameter of the lower end of the first cavity is 2.2 mm, and the height of the first cavity is 15.3 mm.

[0013] Furthermore, the second cavity is substantially a cylindrical cavity, and the diameter of the second cavity is smaller than the minimum diameter of the first cavity.

[0014] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is: to provide an air compressor, comprising the exhaust muffler provided by any of the above-mentioned solutions.

[0015] The utility model has the following beneficial effects: the exhaust silencer and air compressor of the utility model include a shell, a first cavity opened inside the shell, a second cavity, and a transition portion arranged between the first cavity and the second cavity. The shell includes a mounting portion arranged at one end and a shell portion connected to the mounting portion. When in use, the discharged high-pressure gas enters through the upper end of the first cavity on the mounting portion above the shell, then quickly flows to the transition portion through the first cavity, then enters the second cavity, and finally is discharged through the lower end outlet of the second cavity. Since the diameter of the first cavity is greater than the diameter of the second cavity, that is, the cross-sectional area of ​​the first cavity is greater than the cross-sectional area of ​​the second cavity, when the discharged high-pressure gas passes through cavities with different cross-sectional areas respectively, due to the change in cross-sectional area, the acoustic impedance changes, thereby consuming acoustic energy and playing a role in silencing. The exhaust silencer of the utility model has a first cavity and a second cavity opened in the shell, and the diameter of the second cavity is smaller than the diameter of the first cavity, and the first cavity and the second cavity are connected by the transition portion to form a silencer cavity. The structure is simple, the production cost is low, the installation is convenient, and the stability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of the exhaust muffler of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the exhaust muffler of the utility model from another perspective;

[0019] Figure 3It is a cross-sectional view of the exhaust muffler of the utility model;

[0020] Figure 4 It is a cross-sectional view of the exhaust muffler and the compression cylinder body of the utility model.

[0021] The names and numbers of the parts in the figure are:

[0022] Exhaust silencer 100;

[0023] Shell 1, mounting portion 11, matching portion 111, shell portion 12;

[0024] A first cavity 2, a second cavity 3, and a transition portion 4;

[0025] Compression cylinder 200 , mounting groove 210 . DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the composition related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] like Figure 1 , Figure 3 As shown, this embodiment provides an exhaust muffler 100, including a shell 1, a first cavity 2 opened inside the shell 1, a second cavity 3, and a transition portion 4 arranged between the first cavity 2 and the second cavity 3.

[0028] In some embodiments, such as Figure 1 , Figure 3As shown, the housing 1 is suitable for being installed on the compression cylinder of the air compressor, and the housing 1 includes a mounting portion 11 arranged at one end and a shell portion 12 connected to the mounting portion 11. The mounting portion 11 and the shell portion 12 are an integrally formed structure, the mounting portion 11 is roughly cylindrical, the first cavity 2 is opened in the central part of the mounting portion 11, and the first cavity 1 is opened through the shell portion 12. The upper end face of the mounting portion 11 is a circular horizontal surface, which is convenient for matching with the plane on the compression cylinder of the air compressor. The shell portion 12 is roughly truncated cone-shaped, the diameter of the larger bottom surface of the shell portion 12 is smaller than the diameter of the mounting portion 11, and the larger bottom surface of the shell portion 12 is connected to the mounting portion 11 to form an integrally formed structure. The lower end face of the mounting portion 11 is roughly a circular horizontal abutment surface, which is convenient for abutting against the mounting groove in the compression cylinder, thereby ensuring the stability of the housing 1. The mounting portion 11 includes a matching portion 111 located on the side of the lower end surface, and the matching portion 111 is an inclined surface to prevent the housing 1 from getting stuck at the mounting notch when installing, thereby facilitating the housing 1 to be installed in the mounting groove in the compression cylinder. Preferably, the diameter of the cylindrical mounting portion 11 is 6-10 mm, and the height of the mounting portion 11 is 2-4 mm. Preferably, the diameter of the cylindrical mounting portion 11 is 7.2 mm, and the height of the mounting portion 11 is 3 mm.

[0029] In some embodiments, the shell 12 is truncated cone-shaped, the bottom surface of the larger diameter of the shell 12 is connected to the mounting portion 11, and the larger diameter of the shell 12 is smaller than the diameter of the mounting portion 11, and the central axis of the shell 12 coincides with the central axis of the mounting portion 11. Among them, the lower part of the first cavity 2 is opened at the upper part of the shell 12, the second cavity 3 is opened at the lower part of the shell 12, and the transition part 4 is connected to the bottom end of the first cavity 2 and the upper end of the second cavity 3, so that the first cavity 2, the first cavity 3 and the transition part 4 form a cavity connected from top to bottom. Preferably, the diameter of the upper bottom surface of the shell 12 is 5-6mm, the diameter of the lower bottom surface of the shell 12 is 4-6mm, and the height is 10-20mm. Preferably, the diameter of the upper bottom surface of the shell 12 is 5.5mm, the diameter of the lower bottom surface of the shell 12 is 4.6mm, and the height of the shell 12 is 16.8mm.

[0030] In some embodiments, such as Figure 3As shown, the first cavity 2 is opened in the shell 1. The first cavity 2 is roughly a truncated cone-shaped cavity, the upper end portion of the first cavity 2 is opened to the upper end surface of the mounting portion 11, the lower end portion of the first cavity 2 is opened to the lower position in the shell 12, and the central axis of the first cavity 2 coincides with the central axis of the shell 12 and the central axis of the mounting portion 11. Preferably, the upper end diameter of the first cavity 2 is 2.5-3.5mm, the lower end diameter of the first cavity 2 is 2-3mm, and the height of the first cavity 2 is 13-17mm. Preferably, the upper end diameter of the first cavity 2 is 3mm, the lower end diameter of the first cavity 2 is 2.2mm, and the height of the first cavity 2 is 15.3mm.

[0031] In some embodiments, such as Figure 2 , Figure 3 As shown, the second cavity 3 is opened in the shell portion 12 of the shell 1. The second cavity 3 is roughly a cylindrical cavity, and the diameter of the second cavity 3 is smaller than the minimum diameter of the first cavity 2. The lower end portion of the second cavity 3 is opened to the lower end surface of the shell portion 12. And the central axis of the second cavity 3 coincides with the central axis of the first cavity 2. Preferably, the diameter of the second cavity 3 is 0.5-1.5mm, and the height of the second cavity 3 is 2-3mm. Preferably, the diameter of the second cavity 3 is 1mm, and the height of the second cavity 3 is 2.7mm.

[0032] In some embodiments, such as Figure 3 As shown, the transition portion 4 is opened in the shell portion 12 of the shell 1. The transition portion 4 is an arc-shaped cavity, and the upper end portion of the transition portion 4 is connected to the lower end of the first cavity 2, that is, the diameter of the upper end portion of the transition portion 4 is the same as the diameter of the lower end of the first cavity 2. The lower end portion of the transition portion 4 is connected to the upper end of the second cavity 3, that is, the diameter of the lower end portion of the transition portion 4 is the same as the diameter of the second cavity 3. Preferably, the height of the transition portion 4 is 1.5-2mm. Preferably, the height of the transition portion 4 is 1.8mm.

[0033] When the exhaust silencer 100 of the utility model is in use, the discharged high-pressure gas enters through the upper end of the first cavity 2 on the mounting portion 11 above the shell 1, then quickly flows to the transition portion 4 through the first cavity 2, then enters the second cavity 3, and finally is discharged through the lower end outlet of the second cavity 3. Since the diameter of the first cavity 2 is larger than the diameter of the second cavity 3, that is, the cross-sectional area of ​​the first cavity 2 is larger than the cross-sectional area of ​​the second cavity 3, when the discharged high-pressure gas passes through cavities with different cross-sectional areas respectively, the acoustic impedance changes due to the change in cross-sectional area, thereby consuming sound energy and playing a role in silencing. The exhaust silencer 100 of the utility model is provided with the first cavity 2 and the second cavity 3 in the shell 1, and the diameter of the second cavity 3 is smaller than the diameter of the first cavity 2, and the first cavity 2 and the second cavity 3 are connected by the transition portion 4 to form a silencer cavity. The structure is simple, the production cost is low, the installation is convenient, and the stability is strong.

[0034] like Figure 4 As shown, an embodiment of the utility model further provides an air compressor, the air compressor includes the exhaust muffler 100 provided in any of the above embodiments, the air compressor also includes a compression cylinder 200, and a mounting groove 210 is opened on the compression cylinder 200, and the mounting groove 210 is suitable for installing the exhaust muffler 100.

[0035] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An exhaust muffler for an air compressor, characterized in that: The invention comprises a shell, a first cavity opened inside the shell, a second cavity, and a transition portion arranged between the first cavity and the second cavity. The shell comprises a mounting portion arranged at one end and a shell portion connected to the mounting portion. The mounting portion and the shell portion are an integrally formed structure. The mounting portion is roughly cylindrical, the first cavity is roughly a truncated cone-shaped cavity, the upper end portion of the first cavity is through-opened to the upper end surface of the mounting portion, the lower end portion of the first cavity is opened to a lower position in the shell portion, the second cavity is roughly a cylindrical cavity, and the diameter of the second cavity is smaller than the minimum diameter of the first cavity.

2. The exhaust muffler according to claim 1, characterized in that: The shell part is in a truncated cone shape, the bottom surface of the shell part with a larger diameter is connected to the mounting part, and the maximum diameter of the shell part is smaller than the diameter of the mounting part.

3. The exhaust muffler according to claim 2, characterized in that: The central axis of the shell portion coincides with the central axis of the mounting portion.

4. The exhaust muffler according to claim 1, characterized in that: The central axis of the first cavity coincides with the central axis of the shell portion and the central axis of the mounting portion.

5. The exhaust muffler according to claim 1, characterized in that: The diameter of the upper end of the first cavity is 2.5-3.5 mm, the diameter of the lower end of the first cavity is 2-3 mm, and the height of the first cavity is 13-17 mm.

6. The exhaust muffler according to claim 5, characterized in that: The upper end diameter of the first cavity is 3 mm, the lower end diameter of the first cavity is 2.2 mm, and the height of the first cavity is 15.3 mm.

7. An air compressor, characterized in that: The air compressor comprises the exhaust muffler according to any one of claims 1 to 6.

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