CN203189269U - Exhaust muffler of low-pressure oil-free screw compressor - Google Patents
Exhaust muffler of low-pressure oil-free screw compressor Download PDFInfo
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- CN203189269U CN203189269U CN 201220674574 CN201220674574U CN203189269U CN 203189269 U CN203189269 U CN 203189269U CN 201220674574 CN201220674574 CN 201220674574 CN 201220674574 U CN201220674574 U CN 201220674574U CN 203189269 U CN203189269 U CN 203189269U
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- noise reduction
- anger
- muffler
- pressure oil
- air
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Abstract
The utility model provides an exhaust muffler of a low-pressure oil-free screw compressor. The exhaust muffler comprises an air inlet muffling passage, a buffer cavity and an air outlet muffling passage, wherein the air inlet muffling passage is used for receiving the introduced air flow and primarily muffling the received air flow, the buffer cavity is used for receiving the air flow from the air inlet muffling passage and secondarily muffling the received air flow, the air outlet muffling passage is used for exhausting the air flow inside the buffer cavity and thrice muffling the air flow, and the number of the air inlet muffling passage, the number of the buffer cavity and the number of the air outlet muffling passage can be one or more. According to the muffler provided by the utility model, three-step noise reduction treatment is carried out by setting stagnation pressures and stroke changes of the air inlet muffling passage, the buffer cavity and the air outlet muffling passage on the air flow, and the noise reduction effect is obvious; the noise reducing materials used by the muffler provided by the utility model, including a woven glass fabric, an aluminum fiber acoustic panel, a 2mm pore plate, and centrifugal cotton, are all high temperature resistant materials and good in sound absorption effect; and simultaneously, the centrifugal cotton inside can be prevented from being revealed.
Description
Technical field
The utility model relates to the technical field of low pressure oil free screw compressor, the exhaust muffling device of a kind of low pressure oil free screw compressor of more specifically saying so.
Background technique
Existing baffler is generally columnar structured, and compressor passes in and out vertically, and the baffler barrel is pasted sound-absorbing material (being acoustical cotton), and fixes with Punched Steel Plate; Sound absorbing material is adhered at core resonant cavity two ends. and the center is that Punched Steel Plate constitutes.
This sound absorbing material is acoustical cotton, and adopting natural crystals such as silica sand, limestone, dolomite is main raw material, cooperates industrial chemicals such as some soda ash, borax to be melt into glass; Under melting state, get rid of into cotton-shaped fibril by the external force blowing produced, be between fiber and the fiber crossings on different level to be intertwined mutually, present many tiny gaps. manmade inorganic fibre is divided into two kinds again: glass fibre acoustical cotton and polyester fibre acoustical cotton.Two kinds of products are had nothing in common with each other, not only not environmental protection of glass fibre, and be not easy to construction, and in low pressure oil free screw compressor row, be blown easily, cause pressurized gas to contain foreign matter impurity; The flame retarding of polyester fibre can not meet the demands, and the possibility of very big spontaneous combustion is arranged at the exhaust end of low pressure oil free screw compressor.Prior art directly is attached directly to sound absorbing material to be blown off easily in the resonant cavity and pollutes.
Resonant cavity in the middle of above-mentioned prior art only relies on reduces noise.But when pressurized gas passed through baffler, substantially still bunchy passed through fast, and gas does not pass through resonant cavity greatly; And the low pressure oil free screw compressor is with the customer requirement difference, main rotor rotating speed difference, and pressurized gas frequency difference, resonant frequency is also inequality, and resonant cavity needs to be equipped with different Punched Steel Plates according to resonant frequency, inconvenience check and explained hereafter.
Summary of the invention
In order to address the above problem, the muffler of a kind of low pressure oil free screw compressor that the utility model provides comprises:
The air inlet silencers channel that is used for the feeding air-flow and described air-flow is carried out a noise reduction,
With the air-flow that is used for the described air inlet silencers channel feeding of reception and the buffer cavity that this air-flow is carried out the secondary noise reduction,
And for discharging the air-flow in the described buffer cavity and the silencers channel of giving vent to anger that this air-flow is carried out three noise reductions;
Wherein said air inlet silencers channel, buffer cavity and the silencers channel of giving vent to anger are set to one or more respectively.
Preferably, described air inlet silencers channel comprise be connected with described buffer cavity suction tude be connected with described suction tude and be located at described buffer cavity inside the air inlet silencer mechanism.
Preferably, described air inlet silencer mechanism is the perforated tube identical with described suction tude internal diameter.
Preferably, described buffer cavity comprises an end face, a bottom surface, one first side and one second side, and described bottom surface, first side and second side are by arranging insulation board and external separating, and described end face is connected with the described silencers channel of giving vent to anger.
Preferably, described bottom surface is provided with bottom surface noise reduction layer, and first side and second side are respectively equipped with the side noise reduction layer of same thickness, and described bottom surface noise reduction layer is than described side noise reduction bed thickness.
Preferably, described end face and the described silencers channel of giving vent to anger separate by an acoustic board, and the described silencers channel of giving vent to anger is by insulation board and external separating.
Preferably, the described silencers channel of giving vent to anger comprises give vent to anger noise reduction layer and the no sound absorbing material passage of being located at the described silencers channel centre of giving vent to anger that is connected with the insulation board of the described silencers channel of giving vent to anger.
Preferably, described side noise reduction layer, bottom surface noise reduction layer and the noise reduction layer of giving vent to anger all comprise respectively the acoustic board in the outside and between described acoustic board and insulation board sound absorbing material, described acoustic board comprises glass cloth, aluminum fiber acoustic board and the porous slab that connects successively, described glass cloth is positioned at innermost layer and connects with the described sound absorbing material that is connected, and described sound absorbing material is centrifugal cotton.
Preferably, described insulation board comprises glass cloth, orifice plate and the barrel that connects successively, and described barrel contacts with outside.
Preferably, described porous slab thickness is 1.5-2.5mm, and it is provided with a plurality of apertures, and described each aperture equates for distance between circular and each aperture and scope is 3-4mm.
The utility model is by arranging air inlet silencers channel, buffer cavity and the silencers channel of giving vent to anger carries out three layers of noise reduction process to stagnation pressure and the stroke alteration of air-flow, and noise reduction is obvious; Glass cloth, aluminum fiber acoustic board, 2mm orifice plate, centrifugal Cottonopolis that the utility model adopts are exotic material, and sound-absorbing effect is good, can also prevent that inner centrifugal cotton from not exposing simultaneously.
Description of drawings
Fig. 1 is structural representation of the present utility model;
The structural representation of the insulation board that Fig. 2 provides for the utility model;
The structural representation of the acoustic board that Fig. 3 provides for the utility model.
Embodiment
As shown in Figure 1, the muffler of the low pressure oil free screw compressor that the utility model provides comprises:
The air inlet silencers channel 1 that is used for the feeding air-flow and described air-flow is carried out a noise reduction,
With the air-flow that is used for the described air inlet silencers channel feeding of reception and the buffer cavity 2 that this air-flow is carried out the secondary noise reduction,
And for discharging the air-flow in the described buffer cavity and the silencers channel 3 of giving vent to anger that this air-flow is carried out three noise reductions;
Wherein air inlet silencers channel 1, buffer cavity 2 and the silencers channel 3 of giving vent to anger are set to one or more respectively.Air inlet silencers channel, buffer cavity and the silencers channel of giving vent to anger are set to one respectively in the preferred embodiment that the utility model provides.
Wherein air inlet silencers channel 1 comprise be connected with buffer cavity 2 suction tude be connected with described suction tude and be located at buffer cavity 2 inside the air inlet silencer mechanism; The air inlet silencer mechanism is the perforated tube identical with described suction tude internal diameter in this example, and the radius of this perforated tube also can be set to bigger than described suction tude internal diameter, is radius and the perforated tube of the identical size of suction tude internal diameter for what save that this example of material adopts.
Described end face and the silencers channel 3 of giving vent to anger separate by acoustic board 4, and the silencers channel 3 of giving vent to anger is by insulation board 5 and external separating.The silencers channel 3 of giving vent to anger comprises give vent to anger noise reduction layer and the no sound absorbing material passage of being located at silencers channel 3 centres of giving vent to anger that is connected with the insulation board 5 of the silencers channel 3 of giving vent to anger.Wherein do not have the sound absorbing material passage and can fill the buffer substance of some heat radiation classes or noise reduction class yet, but too not close, so that exhaust.
Wherein bottom surface noise reduction layer, give vent to anger noise reduction layer and side noise reduction layer all comprise acoustic board 4 and the sound absorbing material 9 between described acoustic board 4 and insulation board 5 of being located at the noise reduction layer outside; As shown in Figure 3, wherein acoustic board 4 comprises glass cloth 8, aluminum fiber acoustic board 10 and the porous slab 7 that connects successively, and glass cloth 8 is positioned at innermost layer and is connected with sound absorbing material 9, and sound absorbing material 9 is centrifugal cotton.
As shown in Figure 2, wherein insulation board 5 comprises glass cloth 8, porous slab 7 and the barrel 6 that connects successively, and barrel 6 is positioned at outermost surface.Porous slab 7 thickness are 1.5-2.5mm, and it is provided with a plurality of apertures, and described each aperture equates for distance between circular and each aperture and scope is 3-4mm.
Application process
When pressurized gas enters baffler from entrance by air inlet silencers channel 1, at first pass through perforated tube, air-flow reduces by perforated tube diffusion back speed or stagnation pressure, because the aperture in each hole is very little, audible sound becomes branch to reduce in the noise spectrum that produces, thereby has reached the purpose of a noise reduction sound.Aperture opening diameter 5-10mm in the perforated tube wherein, hole center deployment interplanar distance 5-10mm. pipe assembly internal diameter is same as the compressor air-discharging internal diameter, wall thickness 6mm.
When pressurized gas was discharged from perforated tube, no longer baffler was flow through in the bunchy express delivery, but entered buffer cavity 2 from all directions, thereby finished the secondary noise reduction.And the overall flow direction is right angle and non-rectilinear has strengthened flow process and the noise reduction area of pressurized gas in baffler inside.
Pressurized gas enters when giving vent to anger buffer channel, at first advanced the porous slab 7 of 2mm, the gas stagnation pressure reduces, enter aluminum fiber acoustic board 10 then and carry out noise reduction, again by centrifugal cotton noise reduction, be discharged to no sound absorbing material passage after crossing the acoustic board of being made up of porous slab 7, aluminum fiber acoustic board 10, glass cloth 8, whole process is finished noise reduction for the third time.
Simultaneously, glass cloth 8, aluminum fiber acoustic board 10,2mm porous slab 7, centrifugal Cottonopolis are exotic material.Go for the no oil pressure contracting gas of 280 ℃ of upper limiting temperatures fully.And glass cloth 8, aluminum fiber acoustic board 10,2mm porous slab 7 trilaminate materials guarantee effectively that inner off-line cotton can not spill and cause the impure foreign matter of final pressurized gas.
The two-layer 2mm porous slab 7 that baffler comprises, layer glass cloth 8, layer of aluminum fiber acoustic board 10, the centrifugal cotton of one deck has effect of heat insulation preferably, can make the muffler surface temperature control below 80 ℃.
This technological scheme can make the low pressure of exhaust pressure 1.5barg-3.5barg not have oil pressure contracting gas, and the noise in machine set system reduces the 15-20 decibel.
The utility model is by arranging air inlet silencers channel, buffer cavity and the silencers channel of giving vent to anger carries out three layers of noise reduction process to stagnation pressure and the stroke alteration of air-flow, and noise reduction is obvious; Glass cloth 8, aluminum fiber acoustic board 10,2mm orifice plate 7, centrifugal Cottonopolis that the utility model adopts are exotic material, and sound-absorbing effect is good, can also prevent that inner centrifugal cotton from not exposing simultaneously.
Above embodiment only is used for illustrating content of the present utility model, and except above-mentioned mode of execution, the utility model also has other mode of execution, and all employings are equal to replaces or technological scheme that the equivalent deformation mode forms all drops in the protection domain of the present utility model.
Claims (10)
1. the muffler of a low pressure oil free screw compressor is characterized in that, comprising:
The air inlet silencers channel that is used for the feeding air-flow and described air-flow is carried out a noise reduction,
Be used for receiving the air-flow of described air inlet silencers channel feeding and the buffer cavity that this air-flow is carried out the secondary noise reduction,
And for discharging the air-flow in the described buffer cavity and the silencers channel of giving vent to anger that this air-flow is carried out three noise reductions;
Wherein said air inlet silencers channel, buffer cavity and the silencers channel of giving vent to anger are set to one or more respectively.
2. the muffler of low pressure oil free screw compressor as claimed in claim 1, it is characterized in that, described air inlet silencers channel comprise be connected with described buffer cavity suction tude and the air inlet silencer mechanism that is connected and is located at described buffer cavity inside with described suction tude.
3. the muffler of low pressure oil free screw compressor as claimed in claim 2 is characterized in that, described air inlet silencer mechanism is the perforated tube identical with described suction tude internal diameter.
4. as the muffler of claim 1 or 3 described low pressure oil free screw compressors, it is characterized in that, described buffer cavity comprises an end face, a bottom surface, one first side and one second side, described bottom surface, first side and second side are by arranging insulation board and the external world separates, and described end face is connected with the described silencers channel of giving vent to anger.
5. the muffler of low pressure oil free screw compressor as claimed in claim 4, it is characterized in that, described bottom surface is provided with bottom surface noise reduction layer, and first side and second side are respectively equipped with the side noise reduction layer of same thickness, and described bottom surface noise reduction layer is than described side noise reduction bed thickness.
6. the muffler of low pressure oil free screw compressor as claimed in claim 4 is characterized in that, described end face and the described silencers channel of giving vent to anger separate by an acoustic board, and the described silencers channel of giving vent to anger separates by insulation board and the external world.
7. the muffler of low pressure oil free screw compressor as claimed in claim 6, it is characterized in that the described silencers channel of giving vent to anger comprises give vent to anger noise reduction layer and the no sound absorbing material passage of being located at the described silencers channel centre of giving vent to anger that is connected with the insulation board of the described silencers channel of giving vent to anger.
8. the muffler of low pressure oil free screw compressor as claimed in claim 7, it is characterized in that, described side noise reduction layer, bottom surface noise reduction layer and the noise reduction layer of giving vent to anger all comprise acoustic board and the sound absorbing material between described acoustic board and insulation board in the outside respectively, described acoustic board comprises glass cloth, aluminum fiber acoustic board and the porous slab that connects successively, described glass cloth is positioned at innermost layer and is connected with described sound absorbing material, and described sound absorbing material is centrifugal cotton.
9. the muffler of low pressure oil free screw compressor as claimed in claim 7 is characterized in that, described insulation board comprises glass cloth, orifice plate and the barrel that connects successively, and described barrel is positioned at outermost surface.
10. the muffler of low pressure oil free screw compressor as claimed in claim 7 is characterized in that, described porous slab thickness is 1.5-2.5mm, and it is provided with a plurality of apertures, and described each aperture equates for distance between circular and each aperture and scope is 3-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674574 CN203189269U (en) | 2012-12-10 | 2012-12-10 | Exhaust muffler of low-pressure oil-free screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674574 CN203189269U (en) | 2012-12-10 | 2012-12-10 | Exhaust muffler of low-pressure oil-free screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203189269U true CN203189269U (en) | 2013-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220674574 Expired - Fee Related CN203189269U (en) | 2012-12-10 | 2012-12-10 | Exhaust muffler of low-pressure oil-free screw compressor |
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| CN (1) | CN203189269U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671124A (en) * | 2013-11-13 | 2014-03-26 | 无锡市张泾压力容器制造有限公司 | Inlet silencer |
| CN104564671A (en) * | 2014-10-30 | 2015-04-29 | 沈阳化工大学 | Noise control method of screw rod compressor |
-
2012
- 2012-12-10 CN CN 201220674574 patent/CN203189269U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671124A (en) * | 2013-11-13 | 2014-03-26 | 无锡市张泾压力容器制造有限公司 | Inlet silencer |
| CN103671124B (en) * | 2013-11-13 | 2015-10-21 | 无锡市张泾压力容器制造有限公司 | Intake silencer |
| CN104564671A (en) * | 2014-10-30 | 2015-04-29 | 沈阳化工大学 | Noise control method of screw rod compressor |
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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: 20130911 Termination date: 20161210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |