CN201318290Y - Noise reducing structure in oil-free screw rod compressor sound screening hood - Google Patents
Noise reducing structure in oil-free screw rod compressor sound screening hood Download PDFInfo
- Publication number
- CN201318290Y CN201318290Y CNU200820217855XU CN200820217855U CN201318290Y CN 201318290 Y CN201318290 Y CN 201318290Y CN U200820217855X U CNU200820217855X U CN U200820217855XU CN 200820217855 U CN200820217855 U CN 200820217855U CN 201318290 Y CN201318290 Y CN 201318290Y
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- noise
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- gas inlet
- muffle
- passage
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Abstract
The utility model relates to a noise reducing structure in an oil-free screw rod compressor sound screening hood, which is characterized in that a gas inlet control valve, a compressor unit box body shell and a gas inlet chamber end plate are connected with each other to form a gas inlet muffle chamber of a compressor unit, and a sound screening plate is arranged inside the gas inlet muffle chamber; a compressor unit box body air outlet is arranged on the inner upper part of the compressor unit box body shell, and two muffle plates are arranged inside the compressor unit box body air outlet to form an S-shaped air outlet passage. By prolonging the passage of the gas inlet muffle chamber at the unit gas inlet, the sound absorption area can be increased, so that the noise energy can be better absorbed and the noise can be prevented from leaking; by testing the gas inlet muffle chamber passage, and after a ventilating muffle plate is added at the unit air outlet, the noise can be more effectively prevented from leaking when the air is ventilated through the S-shaped passage; and the noise absorption and noise leakage prevention capacity of the entire sound screening hood can be further improved, and the noise reduction effect is remarkable, and the noise of the entire unit can be reduced 2 dB(A).
Description
Technical field
The utility model relates to a kind of denoising structure, especially a kind of denoising structure that is used for the oil free screw compressor acoustic hood.
Background technique
Oil free screw compressor (hereinafter to be referred as compressor) is the production supporting facility of many industrial enterprises indispensability, and the high noise pollution that produces in its running has very big harm to equipment operator's physical and mental health.Therefore, reduce and control the major issue that its noise is labor protection.
The noise that compressor sends, the position classification by outside radiated noise can be divided into: compressor block noise source, electric moter noise source, admission line noise source, inlet noise source, exhaust duct noise source etc.
At present, measures such as sound insulation, sound absorption, vibration isolation, vibration damping are extensively adopted in the control of compressor noise, thereby effectively reduced the noise pollution of compressor.Compressor noise to be further reduced and control noise source and two kinds of measures of noise transmission can be adopted.Improve the new rotor tooth form of machining accuracy, assembly quality and design of air compressor component, can both effectively control the noise source of compressor.But well-known machining accuracy improves the corresponding cost of one-level and will improve a lot, and existing equipment can not satisfy new required precision simultaneously.And design new rotor tooth form very long process especially.Therefore optimizing unit acoustic hood structure, is the most economical of noise reduction, effective measures.
At prior art Central Plains compressor suction chamber (road) as shown in Figure 1, this structure intake noise reduction chamber gas-entered passageway is shorter, and is limited to the absorption and the barriering effect of noise.Former compressor air outlet structure as shown in Figure 3, exhaust outlet is positioned at the unit side, exhaust outlet has only a noise elimination baffler, and is not obvious to the noise iris action that leaks.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of denoising structure of oil free screw compressor acoustic hood is provided, by lengthening unit suction port intake noise reduction chamber passage, can increase the sound absorption area, can better the absorption of noise energy and intercept noise and leak; By at the unit exhaust outlet, install muffler plate additional, press the air-out of serpentine passage, more effective obstruct noise leaks.
The technological scheme that provides according to the utility model, denoising structure in the oil free screw compressor acoustic hood comprises air intake control valve, Compressor Group cabinet shell, suction chamber end plate, feature is that described air intake control valve, Compressor Group cabinet shell, suction chamber end plate connect to form Compressor Group intake noise reduction chamber, the indoor insulation board that is provided with of Compressor Group intake noise reduction; The top is provided with Compressor Group casing exhaust outlet in the described Compressor Group cabinet shell, is provided with two muffler plates in the Compressor Group casing exhaust outlet and forms S shape air-out passage.
Described air intake control valve is connected below, Compressor Group intake noise reduction chamber.Described insulation board shape is made for L shaped.
The utlity model has following advantage: by lengthening unit suction port intake noise reduction chamber passage, can increase the sound absorption area, can better the absorption of noise energy and intercept noise and leak; By test intake noise reduction chamber passage, this side test spot noise has reduced 3.5dB (A).After installing the ventilation muffler plate additional at the unit exhaust outlet, press the air-out of serpentine passage, more effective obstruct noise leaks; This side test spot noise has reduced 2.5dB (A).Whole acoustic hood is increased to the absorption and the resistance ability of letting out of noise, and noise reduction is obvious, can the descend noise of 2dB (A) of whole unit.
Description of drawings
Fig. 1 is former compressor suction chamber (road) structure A～A sectional view.
Fig. 2 is the utility model suction chamber (road) structure sectional view.
Fig. 3 is former compressor air outlet structure plan view.
Fig. 4 is former compressor air outlet structure plan view.
Fig. 5 is the utility model air outlet structure rear view.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As Fig. 1～shown in Figure 5: comprise suction chamber end plate 1, Compressor Group cabinet shell 2, insulation board 3, muffler plate 4, gear-box 5, one-level main frame 6, secondary main frame 7, main motor 8, filter 9, Compressor Group intake noise reduction chamber 10 and air intake control valve 11 etc.
When using, the utility model is installed on the chassis in the Compressor Group by gear-box 5, one-level main frame 6, secondary main frame 7, main motor 8, filter 9.And adopt air intake control valve 11, filter 9, Compressor Group cabinet shell 2, suction chamber end plate 1 to connect to form Compressor Group intake noise reduction chamber 10, described air intake control valve 11 is connected 10 belows, Compressor Group intake noise reduction chamber.Be provided with insulation board 3 in the described Compressor Group intake noise reduction chamber 10, described insulation board 3 shapes are made L shaped.The top is provided with Compressor Group casing exhaust outlet in the described Compressor Group cabinet shell 2, is provided with two muffler plates 4 in the Compressor Group casing exhaust outlet and forms S shape air-out passage.
Working principle of the present utility model:
Air enters easing valve through serpentine noise elimination passage as shown by arrows in the utility model intake noise reduction chamber, and its gas-entered passageway extends greatly, and the perimeter of section S of passage and increasing than accordingly of sectional area A make inlet noise that obvious decline be arranged simultaneously.And the cooling air exhaust outlet is because of there being the resistance shelves of two ventilation muffler plates, and cooling air is walked the air-out of serpentine passage, and more effective obstruct noise leaks.Therefore whole acoustic hood can better leak with obstruct sound by the absorption of noise energy after adopting these two structures.
Claims (3)
1, the denoising structure in the oil free screw compressor acoustic hood, comprise air intake control valve (11), Compressor Group cabinet shell (2), suction chamber end plate (1), it is characterized in that described air intake control valve (11), Compressor Group cabinet shell (2), suction chamber end plate (1) connect to form Compressor Group intake noise reduction chamber (10), are provided with insulation board (3) in the Compressor Group intake noise reduction chamber (10); The top is provided with Compressor Group casing exhaust outlet in the described Compressor Group cabinet shell (2), is provided with two muffler plates (4) in the Compressor Group casing exhaust outlet and forms S shape air-out passage.
2, the denoising structure in the oil free screw compressor acoustic hood according to claim 1 is characterized in that described air intake control valve (11) is connected below, Compressor Group intake noise reduction chamber (10).
3, the denoising structure in the oil free screw compressor acoustic hood according to claim 1 is characterized in that described insulation board (3) shape is made for L shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820217855XU CN201318290Y (en) | 2008-11-12 | 2008-11-12 | Noise reducing structure in oil-free screw rod compressor sound screening hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820217855XU CN201318290Y (en) | 2008-11-12 | 2008-11-12 | Noise reducing structure in oil-free screw rod compressor sound screening hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201318290Y true CN201318290Y (en) | 2009-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820217855XU Expired - Fee Related CN201318290Y (en) | 2008-11-12 | 2008-11-12 | Noise reducing structure in oil-free screw rod compressor sound screening hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201318290Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678551A (en) * | 2012-06-11 | 2012-09-19 | 苏州普度压缩机有限公司 | Single-screw air compressor structure |
| CN104564671A (en) * | 2014-10-30 | 2015-04-29 | 沈阳化工大学 | Noise control method of screw rod compressor |
| CN105241050A (en) * | 2015-11-03 | 2016-01-13 | 维克（天津）有限公司 | Multi-cavity silencer of air conditioner |
| CN109469600A (en) * | 2018-12-26 | 2019-03-15 | 南京舒普思达医疗设备有限公司 | A kind of medical air compressor with noise reduction ventilating system |
| CN109779907A (en) * | 2019-03-07 | 2019-05-21 | 西安航天动力研究所 | A kind of dry vacuum pump silencer |
-
2008
- 2008-11-12 CN CNU200820217855XU patent/CN201318290Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678551A (en) * | 2012-06-11 | 2012-09-19 | 苏州普度压缩机有限公司 | Single-screw air compressor structure |
| CN104564671A (en) * | 2014-10-30 | 2015-04-29 | 沈阳化工大学 | Noise control method of screw rod compressor |
| CN105241050A (en) * | 2015-11-03 | 2016-01-13 | 维克（天津）有限公司 | Multi-cavity silencer of air conditioner |
| CN109469600A (en) * | 2018-12-26 | 2019-03-15 | 南京舒普思达医疗设备有限公司 | A kind of medical air compressor with noise reduction ventilating system |
| CN109779907A (en) * | 2019-03-07 | 2019-05-21 | 西安航天动力研究所 | A kind of dry vacuum pump silencer |
| CN109779907B (en) * | 2019-03-07 | 2023-12-26 | 西安航天动力研究所 | Silencer for dry vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20151112 |
|
| EXPY | Termination of patent right or utility model |