CN205302939U - Powder metallurgy pipe diffusion silencer - Google Patents
Powder metallurgy pipe diffusion silencer Download PDFInfo
- Publication number
- CN205302939U CN205302939U CN201521059861.3U CN201521059861U CN205302939U CN 205302939 U CN205302939 U CN 205302939U CN 201521059861 U CN201521059861 U CN 201521059861U CN 205302939 U CN205302939 U CN 205302939U
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- pipe
- powder metallurgy
- air inlet
- base plate
- jet noise
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Abstract
The utility model discloses a powder metallurgy pipe diffusion silencer who restraines the jet noise source. The high pressure draught in jet noise source gets into the throttle sleeve pipe through the intake pipe of silencer, because the throttle step -down effect of throttle sleeve pipe makes the high pressure draught obtain the throttle through the throttle sleeve pipe time and steps down. The powder metallurgy who gets into the silencer from orifice sleeve pipe exhaust air current is intraductal, because the powder metallurgy tube material has a large amount of tiny holes, the air current is strained into the air current that no several is little, and stream pressure is reduced again, and the velocity of flow is reduced by the diffusion, therefore radiated noise's intensity just also weakens greatly. Through installing this kind of powder metallurgy pipe diffusion silencer at jet noise source capsule mouth, can obtain 40~60dB (A's) noise suppression effect.
Description
Technical field
This utility model relates to a kind of powder metallurgy pipe diffusor, is specifically related to a kind of powder metallurgy pipe diffusor suppressing jet noise source.
Background technology
Pressed gas is formed spray by exhaustor ejection and the noise that causes violent gas disturbance and radiate is called jet noise. Jet noise is a kind of noise source common in industrial equipment. Owing to the sound source of jet noise is just at exhaust pipe mouth, if installing the acoustic filter of general structure, such as dissipative muffler or reactive muffler and their composite muffler, its result simply moves on to muffler outlet jet noise source from the original mouth of pipe, it is impossible to receive due soundproof effect. Therefore, must have diffusion reduction of speed for the acoustic filter in jet noise source or change the functions such as spray flow parameter, the soundproof effect that could have obtained.
Summary of the invention
The purpose of this utility model there are provided a kind of powder metallurgy pipe diffusor suppressing jet noise. This acoustic filter can be divided into two parts from noise elimination structure: Part I, and air-flow enters throttling sleeve pipe through air inlet pipe, owing to throttling sleeve pipe has the effect of reducing pressure by regulating flow, makes high pressure draught pressure when by throttling sleeve pipe be reduced. Part II, owing to powder metallurgy tube material is with substantial amounts of tiny hole, the air-flow gone out from throat bushing bank of tubes can be made to be filtered into numerous little air-flow, stream pressure is lowered again, flow velocity is spread reduction, thus the intensity of radiated noise also just weakens significantly, meanwhile, this kind of powder metallurgy porous material also has the sound absorption of resistive material. Design this acoustic filter it is noted that effectively area of efflux is greater than the cross-sectional area in silencer air inlet pipe road. By installing this powder metallurgy pipe diffusor at jet noise source capsule mouth, the soundproof effect of 40��60dB (A) can be obtained.
The utility model is achieved like this, a kind of powder metallurgy pipe diffusor suppressing jet noise source, it includes base plate, air inlet pipe, throttling sleeve pipe, powder metallurgy pipe and cover plate, it is characterized in that: base plate, air inlet pipe and throttling sleeve pipe form assembly welding body by welding, and the upper end perforated portion of air inlet pipe to be welded in the top of base plate, the weld seam that base plate is formed with air inlet pipe answers No leakage; Powder metallurgy pipe and cover plate form assembly welding body by welding, and the weld seam of formation answers No leakage; Finally the weld seam that base plate is formed by welding formation acoustic filter, base plate and powder metallurgy pipe with powder metallurgy pipe is answered No leakage.
The diffusion blood pressure lowering having the technical effect that this utility model passes through the throttling reducing pressure by regulating flow of sleeve pipe and powder metallurgy pipe of the present utility model, effectively inhibits jet noise.
Accompanying drawing explanation
Fig. 1 is powder metallurgy pipe diffusor structural representation.
In the drawings, 1, cover plate 2, powder metallurgy pipe 3, throttling sleeve pipe 4, air inlet pipe 5, base plate.
Detailed description of the invention
As shown in Figure 1, it is made up of cover plate 1, powder metallurgy pipe 2, throttling sleeve pipe 3, air inlet pipe 4, base plate 5 etc., the cover plate 1 of this acoustic filter and powder metallurgy pipe 2 are by being welded, and weld seam answers No leakage, throttling sleeve pipe 3, air inlet pipe 4, base plate 5 are by being welded, and the weld seam of air inlet pipe 4 and base plate 5 answers No leakage, finally by base plate 5 in assembly welding body with powder metallurgy pipe in another assembly welding body 2 by weld formation acoustic filter, the weld seam of base plate 5 and powder metallurgy pipe 2 formation answers No leakage.
This acoustic filter is the reducing pressure by regulating flow diffusor of a kind of effective suppression jet noise, there is two-stage noise elimination structure, the reducing pressure by regulating flow silencing channel of the first order is made up of air inlet pipe 4, throttling sleeve pipe 3 etc., and the diffusion blood pressure lowering silencing channel of the second level is made up of with powder metallurgy pipe 2 etc. cover plate 1. Design this acoustic filter it is noted that effectively area of efflux is greater than the cross-sectional area in silencer air inlet pipe road. By installing this powder metallurgy pipe diffusor at jet noise source capsule mouth, the soundproof effect of 40��60dB (A) can be obtained.
Operation principle of the present utility model: the high pressure draught of jet noise source capsule mouth enters throttling sleeve pipe 3 through air inlet pipe 4 and from n, air inlet pipe 4 top aperture, owing to throttling sleeve pipe 3 has the effect of reducing pressure by regulating flow, high pressure draught is made to obtain reducing pressure by regulating flow when by throttling sleeve pipe 3. The air-flow gone out from throat bushing bank of tubes enters in the powder metallurgy pipe of acoustic filter, owing to powder metallurgy tube material is with substantial amounts of tiny hole, air-flow is filtered into numerous little air-flow, and air-flow is again by diffusion blood pressure lowering, flow velocity is spread reduction, thus the intensity of radiated noise also just weakens significantly. Meanwhile, this kind of powder metallurgy porous material also has the sound absorption of resistive material.
Claims (3)
1. the powder metallurgy pipe diffusor suppressing jet noise source, it is characterized in that: base plate, air inlet pipe and throttling sleeve pipe form assembly welding body by welding, and the upper end perforated portion of air inlet pipe to be welded in the top of base plate, the weld seam that base plate is formed with air inlet pipe answers No leakage; Powder metallurgy pipe and cover plate form assembly welding body by welding, and the weld seam of formation answers No leakage; Finally the weld seam that base plate is formed by welding formation acoustic filter, base plate and powder metallurgy pipe with powder metallurgy pipe is answered No leakage.
2. a kind of powder metallurgy pipe diffusor suppressing jet noise source according to claim 1, it is characterized in that: the upper end perforated portion of the air inlet pipe of described powder metallurgy pipe diffusor to be welded in the top of base plate, after being passed from air inlet pipe perforated portion by the high pressure draught of air inlet pipe with guarantee in the cavity of acoustic filter.
3. a kind of powder metallurgy pipe diffusor suppressing jet noise source according to claim 1, it is characterized in that: jet noise is had two-stage buck configuration, the reducing pressure by regulating flow structure of throttling sleeve pipe and the diffusion buck configuration of powder metallurgy pipe by described powder metallurgy pipe diffusor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521059861.3U CN205302939U (en) | 2015-12-19 | 2015-12-19 | Powder metallurgy pipe diffusion silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521059861.3U CN205302939U (en) | 2015-12-19 | 2015-12-19 | Powder metallurgy pipe diffusion silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205302939U true CN205302939U (en) | 2016-06-08 |
Family
ID=56471515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521059861.3U Active CN205302939U (en) | 2015-12-19 | 2015-12-19 | Powder metallurgy pipe diffusion silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205302939U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283771A (en) * | 2021-12-31 | 2022-04-05 | 中国航空工业集团公司西安飞机设计研究所 | Combined silencer suitable for high-temperature and high-pressure gas emission |
-
2015
- 2015-12-19 CN CN201521059861.3U patent/CN205302939U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283771A (en) * | 2021-12-31 | 2022-04-05 | 中国航空工业集团公司西安飞机设计研究所 | Combined silencer suitable for high-temperature and high-pressure gas emission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |