Exhaust silencer
By setting a partition inside the sleeve to form an exhaust expansion chamber and combining it with a sound-absorbing layer, the problems of complex installation and high cost of existing exhaust mufflers are solved, achieving noise reduction while simplifying installation and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-03-31
AI Technical Summary
Existing exhaust silencers are complex to install in gear centrifugal air compressors, costly, and large in size, making it difficult to effectively reduce noise and requiring additional piping.
A sleeve is designed with several sequentially arranged partitions inside to form an exhaust expansion chamber. The difference in the inner diameter of the partitions reduces the air pressure and flow rate, and combined with the sound-absorbing layer to absorb noise, a noise reduction effect is achieved.
It effectively reduces noise, simplifies the installation process, lowers costs, reduces space occupation, and eliminates the need for additional piping.
Smart Images
Figure CN224064588U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air compression technology, and in particular to an exhaust silencer required for an air compression system. Background Technology
[0002] During operation, gear centrifugal air compressors need to discharge excess compressed air to maintain stable system pressure and prevent surge. Simultaneously, to reduce the noise generated during the discharge of excess compressed air, exhaust silencers are typically installed. However, existing exhaust silencers are mostly impedance composite silencers or small-orifice injection silencers. While both types can reduce exhaust noise, they require additional piping, have high installation and positioning requirements, and are large in size, occupying significant installation space. Furthermore, existing silencers are expensive, resulting in a higher overall cost for gear centrifugal air compressors. Utility Model Content
[0003] To facilitate installation and reduce costs, this utility model proposes an exhaust muffler. The muffler includes a sleeve containing several sequentially arranged partitions. The central axis of each partition coincides with the central axis of the sleeve. The inlet inner diameter of each partition is smaller than its outlet inner diameter. The inlet of each partition faces the exhaust inlet of the sleeve, and the outer edge of its outlet end is flush with the inner wall of the sleeve, dividing the inner cavity of the sleeve into several sequentially arranged exhaust expansion chambers. This utility model's exhaust muffler divides the inner cavity of the sleeve into several sequentially arranged exhaust expansion chambers using these partitions. During use, excess compressed air discharged from the gear centrifugal air compressor enters the inner cavity of the sleeve through the exhaust inlet of this utility model's exhaust muffler, passes through each exhaust expansion chamber sequentially, and is then discharged into the atmosphere through the exhaust outlet of this utility model's exhaust muffler. Because the inlet inner diameter of the separator is smaller than the outlet inner diameter, meaning the inlet cross-sectional area of the exhaust expansion chamber is smaller than the flow channel cross-sectional area, the compressed air pressure decreases and the airflow velocity slows down after entering the exhaust expansion chamber. Therefore, the excess compressed air discharged from the gear centrifugal air compressor in this exhaust silencer undergoes pressure reduction through several exhaust expansion chambers before being discharged into the atmosphere with a lower pressure drop and flow velocity. This effectively reduces the dynamic noise of the compressed air, thereby effectively reducing the noise generated when the gear centrifugal air compressor discharges excess compressed air. Furthermore, this exhaust silencer achieves noise reduction simply by changing the internal structure of the sleeve. Therefore, this exhaust silencer has a simple structure, low manufacturing cost, small size, and requires minimal installation space. When installing this exhaust silencer, no additional piping is needed, and the installation and positioning requirements are also low. Therefore, this exhaust silencer not only ensures effective exhaust noise reduction but is also easy to install, effectively reducing the cost incurred in reducing noise when the gear centrifugal air compressor discharges excess compressed air.
[0004] Preferably, the separator is a conical cylinder. Such a separator has a simple structure, is easy to manufacture and install, and can further reduce the manufacturing cost of the exhaust muffler of this invention.
[0005] Preferably, the sleeve includes an outer cylinder and an inner cylinder, with the outer cylinder covering the outer periphery of the inner cylinder, and a sound-absorbing layer sandwiched between the outer cylinder and the inner cylinder. Thus, in use, the exhaust muffler of this invention can absorb noise using the sound-absorbing layer sandwiched between the outer and inner cylinders, reducing noise during compressed air discharge and preventing the dynamic noise of compressed air from leaking out through the sleeve, effectively improving the noise reduction effect of the gear centrifugal air compressor when discharging excess compressed air. Furthermore, the inner cylinder wall is provided with multiple sound-absorbing through holes. These holes facilitate sound absorption by the sound-absorbing layer, further enhancing the noise reduction effect of the exhaust muffler of this invention. More preferably, the sound-absorbing through holes are evenly distributed on the inner cylinder wall. This allows the sound-absorbing layer to absorb sound through the evenly distributed through holes, further improving the noise reduction effect of the exhaust muffler of this invention.
[0006] Preferably, the sound-absorbing layer is formed by filling it with sound-absorbing material. This method of using sound-absorbing material to form the sound-absorbing layer is simple and convenient to manufacture, effectively reducing the production cost of the exhaust muffler of this invention. Further, the sound-absorbing material is sound-absorbing cotton or felt. This method of using sound-absorbing cotton or felt as the sound-absorbing material is simple and convenient to select, and also inexpensive.
[0007] Preferably, the end of the sleeve is provided with a mounting plate, and the mounting plate is closedly connected to the outer cylinder. Thus, by providing a mounting plate at the end of the sleeve that is closedly connected to the outer cylinder, the end of the sleeve is sealed, preventing leakage of sound-absorbing material and thus avoiding affecting the noise reduction effect of the exhaust muffler of this invention. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the exhaust muffler of this utility model;
[0009] Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure. Detailed Implementation
[0010] Below, in conjunction with Figure 1 and 2 This article provides a detailed description of the exhaust muffler of this utility model.
[0011] like Figure 1 and 2As shown, the exhaust muffler of this utility model includes a sleeve 1, inside which are arranged a plurality of sequentially arranged partitions 2. The central axis of the partitions 2 coincides with the central axis of the sleeve 1. The inner diameter of the inlet of the partition 2 is smaller than the inner diameter of the outlet of the partition 2. The inlet of the partition 2 faces the exhaust inlet 101 of the sleeve 1. The outer edge of the outlet end of the partition 2 is attached to the inner wall of the sleeve 1, dividing the inner cavity of the sleeve 1 into a plurality of sequentially arranged exhaust expansion chambers 102. Preferably, the partition 2 is a conical cylinder. Such a partition 2 has a simple structure, is easy to manufacture and install, and can further reduce the manufacturing cost of the exhaust muffler of this utility model.
[0012] like Figure 1 and 2 As shown, the sleeve 1 includes an outer cylinder 11 and an inner cylinder 12. The outer cylinder 11 is fitted over the outer periphery of the inner cylinder 12, and a sound-absorbing layer 13 is sandwiched between the outer cylinder 11 and the inner cylinder 12. Thus, in use, the exhaust muffler of this invention can absorb noise using the sound-absorbing layer 13 sandwiched between the outer cylinder 11 and the inner cylinder 12. This reduces the noise during compressed air discharge and prevents the dynamic noise of compressed air from leaking out through the sleeve, effectively improving the noise reduction effect of the gear centrifugal air compressor when discharging excess compressed air. Preferably, the inner cylinder 12 has multiple sound-absorbing through holes (not shown in the figure) on its wall. This facilitates sound absorption by the sound-absorbing layer 13, further improving the noise reduction effect of the exhaust muffler of this invention. Preferably, the sound-absorbing through holes are evenly distributed on the inner cylinder 12. This allows the sound-absorbing layer 13 to absorb sound through the evenly distributed through holes, further improving the noise reduction effect of the exhaust muffler of this invention. Preferably, the sound-absorbing layer 13 is formed by filling it with sound-absorbing material. This method of using sound-absorbing material to form the sound-absorbing layer 13 is simple and convenient to manufacture, effectively reducing the production cost of the exhaust muffler of this invention. Preferably, the sound-absorbing material is sound-absorbing cotton or felt. This method of using sound-absorbing cotton or felt as the sound-absorbing material is simple and convenient to select, and has low cost. Preferably, the end of the sleeve 1 is provided with a mounting sealing plate 14, and the mounting sealing plate 14 is closedly connected to the outer cylinder 11. This mounting sealing plate, which is closedly connected to the outer cylinder 11 at the end of the sleeve 1, seals the end of the sleeve 1, preventing sound-absorbing material leakage and affecting the noise reduction effect of the exhaust muffler of this invention.
[0013] This utility model exhaust muffler divides the inner cavity of the sleeve 1 into several sequentially arranged exhaust expansion chambers 102 by setting several sequentially arranged partitions 2 inside the sleeve 1. In use, the excess compressed air discharged from the gear centrifugal air compressor enters the inner cavity of the sleeve through the exhaust inlet 101 of this utility model exhaust muffler, and then passes through each exhaust expansion chamber 102 in sequence to reduce pressure before being discharged into the atmosphere through the exhaust outlet 103 of this utility model exhaust muffler. Because the inlet inner diameter of the separator 2 is smaller than the outlet inner diameter of the separator 2, that is, the inlet cross-sectional area of the exhaust expansion chamber 102 is smaller than the flow channel cross-sectional area, the compressed air pressure decreases and the airflow velocity slows down after entering the exhaust expansion chamber 102. Therefore, the excess compressed air discharged from the gear centrifugal air compressor in this utility model exhaust silencer must pass through several exhaust expansion chambers 102 for pressure reduction before being discharged into the atmosphere with a lower pressure drop and flow velocity. This can effectively reduce the dynamic noise of compressed air, and thus effectively reduce the noise generated when the gear centrifugal air compressor discharges excess compressed air. In addition, this utility model exhaust silencer can achieve the noise reduction effect simply by changing the internal cavity structure of the sleeve 1. Therefore, this utility model exhaust silencer has a simple structure, low manufacturing cost, small size, and small installation space occupation. When installing this utility model exhaust silencer, not only is it not necessary to add extra pipelines, but the installation and positioning requirements are also low. Therefore, this utility model exhaust silencer not only ensures the exhaust noise reduction effect, but is also easy to install, and can effectively reduce the cost incurred in reducing noise when the gear centrifugal air compressor discharges excess compressed air.
Claims
1. An exhaust silencer, characterized by, The exhaust silencer comprises a sleeve, a plurality of partition pieces arranged in sequence are arranged in the sleeve, the central axis of the partition piece is coincident with the central axis of the sleeve, the inlet inner diameter of the partition piece is smaller than the outlet inner diameter of the partition piece, the inlet of the partition piece is towards the exhaust inlet of the sleeve, and the outer edge of the outlet end of the partition piece is in close contact with the inner wall of the sleeve and separates the inner cavity of the sleeve into a plurality of exhaust expansion chambers arranged in sequence.
2. The exhaust silencer according to claim 1, characterized in that The partition piece is a conical cylinder.
3. The exhaust silencer according to claim 2, characterized in that The sleeve comprises an outer cylinder and an inner cylinder, the outer cylinder is sleeved on the periphery of the inner cylinder, and the sound-absorbing layer is clamped between the outer cylinder and the inner cylinder.
4. The exhaust silencer according to claim 3, characterized in that A plurality of sound-absorbing through holes are arranged on the cylinder wall of the inner cylinder.
5. The exhaust silencer according to claim 4, characterized in that The sound-absorbing through holes are uniformly distributed on the cylinder wall of the inner cylinder.
6. The exhaust silencer according to any one of claims 3 to 5, characterized in that The sound-absorbing layer is formed by filling sound-absorbing material.
7. The exhaust silencer according to claim 6, characterized in that The sound-absorbing material is sound-absorbing cotton or felt.
8. The exhaust silencer according to any one of claims 3 to 5, characterized in that An installation sealing plate is arranged at the end of the sleeve, and the installation sealing plate is in closed connection with the outer cylinder.