CN207178219U - Compressor air-discharging denoising structure and compressor - Google Patents
Compressor air-discharging denoising structure and compressor Download PDFInfo
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- CN207178219U CN207178219U CN201721155917.4U CN201721155917U CN207178219U CN 207178219 U CN207178219 U CN 207178219U CN 201721155917 U CN201721155917 U CN 201721155917U CN 207178219 U CN207178219 U CN 207178219U
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Abstract
It the utility model is related to a kind of compressor air-discharging denoising structure and compressor, wherein, compressor air-discharging denoising structure includes the end cap located at compressor air-discharging end, the end cap is provided with exhaust outlet, downtake pipe, second exhaust pipe and the first expansion chamber are provided with the end cap, the downtake pipe, first expansion chamber, the second exhaust pipe and the exhaust outlet are in fluid communication, and the air-flow of the downtake pipe discharge passes sequentially through first expansion chamber, the second exhaust pipe and exhaust outlet discharge compressor.The utility model sets expansion chamber in end cap, expansion chamber is entered by blast pipe by the gas after rotor compression in compressor, using expansion type noise-cancelling theory after expansion is eliminated the noise, gas discharges compressor by the exhaust outlet on blast pipe and end cap, by way of built-in expansion type exhausting and denoising, compressor air-discharging noise can be effectively reduced, solves the problems, such as limited for noise reduction installing space, higher cost of investment will not be produced.
Description
Technical field
It the utility model is related to compressor field, more particularly to a kind of compressor air-discharging denoising structure and compressor.
Background technology
Helical-lobe compressor carries out air-breathing, compression and exhaust due to its high speed, periodically to gas, often produce compared with
Big noise, sometimes work noise can reach more than 100dB (A), can produce large effect for environment and personnel health.
In order to reduce compressor operating noise, people often using compressor integrally insulate against sound or external silencing apparatus by the way of, but can increase
Add cost of investment, and compressor needs larger installing space.
Utility model content
The purpose of this utility model is to propose a kind of compressor air-discharging denoising structure and compressor, and it can solve the problem that existing pressure
The problem of contracting machine exhausting silencer noise reduction mode cost is high, and required installing space is big.
To achieve the above object, the utility model provides a kind of compressor air-discharging denoising structure, and it is included located at compression
The end cap of machine exhaust end, the end cap are provided with exhaust outlet, and it is swollen to be provided with downtake pipe, second exhaust pipe and first in the end cap
Swollen chamber, the downtake pipe, first expansion chamber, the second exhaust pipe and the exhaust outlet are in fluid communication, and described the
The air-flow of one blast pipe discharge passes sequentially through first expansion chamber, the second exhaust pipe and exhaust outlet discharge compression
Machine.
Preferably or in alternative embodiment, the second expansion chamber and the 3rd blast pipe are additionally provided with the end cap one, described the
Two blast pipes, second expansion chamber, the 3rd blast pipe and the exhaust outlet are in fluid communication, the downtake pipe discharge
Air-flow pass sequentially through first expansion chamber, the second exhaust pipe, second expansion chamber, the 3rd blast pipe and institute
State exhaust outlet discharge compressor.
One preferably or in alternative embodiment, the sectional area of first expansion chamber is more than the section of the downtake pipe
Product.
One preferably or in alternative embodiment, the sectional area of first expansion chamber is more than the section of the second exhaust pipe
Product.
One preferably or in alternative embodiment, first expansion chamber is surrounded by the inwall of dividing plate and the end cap.
One preferably or in alternative embodiment, the sectional area of second expansion chamber is more than the section of the second exhaust pipe
Product.
One preferably or in alternative embodiment, the sectional area of second expansion chamber is more than the section of the 3rd blast pipe
Product.
One preferably or in alternative embodiment, second expansion chamber is surrounded by the inwall of dividing plate and the end cap.
One preferably or in alternative embodiment, first expansion chamber is surrounded by the inwall of dividing plate and the end cap, and
First expansion chamber and the second expansion chamber common sparing dividing plate.
To achieve the above object, the utility model provides a kind of compressor, and it includes the pressure in any of the above-described embodiment
Contracting machine exhausting and denoising structure.
One preferably or in alternative embodiment, compressor includes helical-lobe compressor.
Based on above-mentioned technical proposal, the utility model at least has the advantages that：
The utility model sets expansion chamber in end cap, is entered in compressor by the gas after rotor compression by blast pipe
Expansion chamber, using expansion type noise-cancelling theory after expansion is eliminated the noise, gas discharges pressure by the exhaust outlet on blast pipe and end cap
Contracting machine, by way of built-in expansion type exhausting and denoising, compressor air-discharging noise can be effectively reduced, is made full use of in end cap
Space, can solve the problem that for noise reduction installing space it is limited the problem of, higher cost of investment will not be produced.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, forms the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not form to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is the schematic diagram for the compressor air-discharging denoising structure that the utility model embodiment provides.
Label in accompanying drawing：
1- end caps；2- downtake pipes；3- second exhaust pipes；The blast pipes of 4- the 3rd；The expansion chambers of 5- first；6- second expands
Chamber；7- exhaust outlets；8- dividing plates.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in embodiment is carried out clear, complete
Ground describes.Obviously, described embodiment is only part of the embodiment of the present utility model, rather than whole embodiments.
Based on embodiment of the present utility model, institute that those of ordinary skill in the art are obtained under the premise of creative work is not made
There is other embodiment, belong to the scope of the utility model protection.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply and be signified
Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this practicality
The limitation of novel protected scope.
As shown in figure 1, it is the illustrative examples of compressor air-discharging denoising structure provided by the utility model, in the signal
Property embodiment in, compressor air-discharging denoising structure includes the end cap 1 located at compressor air-discharging end, and end cap 1 is provided with exhaust outlet 7, end
Downtake pipe 2, the expansion chamber 5 of second exhaust pipe 3 and first, downtake pipe 2, the first expansion chamber 5, second row are provided with lid 1
Tracheae 3 and exhaust outlet 7 are in fluid communication, and the air-flow that downtake pipe 2 is discharged passes sequentially through the first expansion chamber 5, the and of second exhaust pipe 3
Exhaust outlet 7 discharges compressor.
Compressor air-discharging denoising structure is built in the end cap at compressor air-discharging end by the utility model, and including expansion chamber
And blast pipe, compressor is interior to enter expansion chamber by the gas after rotor compression by blast pipe, utilizes expansion type noise-cancelling theory to pass through
After crossing expansion noise elimination, gas discharges compressor by the exhaust outlet on blast pipe and end cap, passes through built-in expansion type exhausting and denoising
Mode, the exhaust noise (reducing noise figure up to more than 10dBA for band segment) of compressor can be reduced, and can be solved
Certainly for noise reduction installing space it is limited the problem of, reduce cost of investment of the user for noise countermeasure.
In the illustrative examples of above-mentioned compressor exhausting and denoising structure, the second expansion chamber 6 is also provided with end cap 1
With the 3rd blast pipe 4, second exhaust pipe 3, the second expansion chamber 6, the 3rd blast pipe 4 and exhaust outlet 7 are in fluid communication, downtake pipe
The air-flow of 2 discharges passes sequentially through the first expansion chamber 5, second exhaust pipe 3, the second expansion chamber 6, the 3rd blast pipe 4 and the row of exhaust outlet 7
Go out compressor.
The first expansion chamber 5 is entered by downtake pipe 2 first by the gas after rotor compression in compressor, utilizes expansion type
After once expanding noise elimination, gas is eliminated the noise into the second expansion chamber 6 by second exhaust pipe 3 for noise-cancelling theory, finally by the
Exhaust outlet 7 on three blast pipes 4 and the end cap 1 at compressor air-discharging end discharges compressor, can effectively reduce compressor air-discharging and make an uproar
Sound, the space in end cap 1 is made full use of, higher cost of investment will not be produced, and can solve the problem that have for noise reduction installing space
The problem of limit.
Certainly, one can be set in actual setting, in end cap 1, more than two, or three expansion chamber, but considered
After being had more to expansion chamber, exhaust crushing can also increase, it is therefore preferable that 1~2 expansion chamber.And in the feelings for setting multiple expansion chambers
Under condition, it may be considered that expansion chamber is connected and the set-up mode in parallel being combined.
In above-described embodiment, the sectional area of the first expansion chamber 5 is more than the sectional area of downtake pipe 2.First expansion chamber 5
Sectional area is more than the sectional area of second exhaust pipe 3.
In above-described embodiment, the sectional area of the second expansion chamber 6 is more than the sectional area of second exhaust pipe 3.Second expansion chamber 6
Sectional area is more than the sectional area of the 3rd blast pipe 4.
In above-described embodiment, the first expansion chamber 5 can be surrounded by the inwall of dividing plate 8 and end cap 1, can make full use of end
Space in lid 1, it is easy to process, higher cost of investment will not be produced.
In above-described embodiment, the second expansion chamber 6 can be surrounded by the inwall of dividing plate 8 and end cap 1, can make full use of end
Space in lid 1, it is easy to process, higher cost of investment will not be produced.
In above-described embodiment, the first expansion chamber 5 and the second expansion chamber 6 can make full use of end with common sparing dividing plate 8
Space in lid 1, and it is easy to process, higher cost of investment will not be produced.
Dividing plate 8 in above-mentioned each embodiment can use 6mm thickness Q345R steel plates to manufacture, and be welded on compressor air-discharging end
End cap 1 inside.
Blast pipe in above-mentioned each embodiment can use seamless steel pipe material, be welded on dividing plate 8.Each blast pipe
Cross-sectional area can be with different.
Compressor air-discharging denoising structure its sound deadening capacity that the utility model embodiment provides-sound transmission loss TL can be by following formula meter
Calculate：
In formula：M is divergence ratio, i.e. the ratio between expansion chamber sectional area and blast pipe sectional area；K is (circle) wave number, k=2 π f/c,
F is frequency of noise elimination, and c is the velocity of sound；L is expansion cavity length.
The concrete application of the compressor air-discharging denoising structure of the utility model embodiment offer is provided.
It is 2970rpm for rotating speed, the male rotor number of teeth is 5 compressor, and its noise fundamental frequency is about 2970/5 ≈ 250Hz,
Compressor operating noise is concentrated mainly in fundamental frequency and its frequency multiplication, and based on middle low frequency.
It is 0.0046m for blast pipe sectional area2, expansion chamber sectional area is 0.0611m2 compressor, when expansion chamber is grown
Spend for 0.22m when, its sound transmission loss to frequency of noise elimination 500Hz2 frequencys multiplication is 16dB.With reference to two expansions being cascaded
Chamber, it is feasible that it reduces 5dB~8dB to compressor air-discharging noise synthesis sound pressure level.
Above-mentioned sound transmission loss refers to that exhaust disengaging compressor air-discharging denoising structure sound pressure level reduces 16db, but exhaust noise
It is considered as muffler inlet noise and outlet noise.Such as：Muffler inlet sound pressure level is a, is exported as b, but exhaust noise
A and b parts should be considered.
With reference to the different qualities of different compressors, the parameters such as divergence ratio, frequency of noise elimination and expansion cavity length can be carried out
Adjustment.
The utility model additionally provides a kind of embodiment of compressor, and in this embodiment, compressor includes any of the above-described
Compressor air-discharging denoising structure in embodiment.
In above-described embodiment, compressor can include helical-lobe compressor.
The compressor air-discharging denoising structure that the utility model embodiment provides, which can produce, reduces compressor air-discharging noise
Effect, reduction effect can be equally played for compressor overall operation noise.
In description of the present utility model, it is to be understood that limited using the word such as " first ", " second ", " the 3rd "
Determine parts, it is only for be easy to distinguish above-mentioned parts, such as there is no a Stated otherwise, above-mentioned word is not special
Implication, therefore it is not intended that limitation to scope of protection of the utility model.
Finally it should be noted that:Above example is only illustrating the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should
Understand：Specific embodiment of the present utility model can still be modified or some technical characteristics are equally replaced
Change；Without departing from the spirit of technical solutions of the utility model, it all should cover in the claimed technical scheme of the utility model
Among scope.
Claims (11)
- A kind of 1. compressor air-discharging denoising structure, it is characterised in that：Including the end cap (1) located at compressor air-discharging end, the end Lid (1) is provided with exhaust outlet (7), and downtake pipe (2), second exhaust pipe (3) and the first expansion chamber are provided with the end cap (1) (5), the downtake pipe (2), first expansion chamber (5), the second exhaust pipe (3) and the exhaust outlet (7) fluid Connection, the air-flow of the downtake pipe (2) discharge pass sequentially through first expansion chamber (5), the second exhaust pipe (3) and The exhaust outlet (7) discharges compressor.
- 2. compressor air-discharging denoising structure as claimed in claim 1, it is characterised in that：Second is additionally provided with the end cap (1) Expansion chamber (6) and the 3rd blast pipe (4), the second exhaust pipe (3), second expansion chamber (6), the 3rd blast pipe (4) it is in fluid communication with the exhaust outlet (7), the air-flow of downtake pipe (2) discharge passes sequentially through first expansion chamber (5), the second exhaust pipe (3), second expansion chamber (6), the 3rd blast pipe (4) and the exhaust outlet (7) discharge Compressor.
- 3. compressor air-discharging denoising structure as claimed in claim 1, it is characterised in that：The section of first expansion chamber (5) Sectional area of the product more than the downtake pipe (2).
- 4. compressor air-discharging denoising structure as claimed in claim 1, it is characterised in that：The section of first expansion chamber (5) Sectional area of the product more than the second exhaust pipe (3).
- 5. compressor air-discharging denoising structure as claimed in claim 1, it is characterised in that：First expansion chamber (5) by every The inwall of plate (8) and the end cap (1) surrounds.
- 6. compressor air-discharging denoising structure as claimed in claim 2, it is characterised in that：The section of second expansion chamber (6) Sectional area of the product more than the second exhaust pipe (3).
- 7. compressor air-discharging denoising structure as claimed in claim 2, it is characterised in that：The section of second expansion chamber (6) Sectional area of the product more than the 3rd blast pipe (4).
- 8. compressor air-discharging denoising structure as claimed in claim 2, it is characterised in that：Second expansion chamber (6) by every The inwall of plate (8) and the end cap (1) surrounds.
- 9. compressor air-discharging denoising structure as claimed in claim 8, it is characterised in that：First expansion chamber (5) by every The inwall of plate (8) and the end cap (1) surrounds, and first expansion chamber (5) and the second expansion chamber (6) common sparing every Plate (8).
- A kind of 10. compressor, it is characterised in that：Including the compressor air-discharging noise reduction knot as described in any one of claim 1~9 Structure.
- 11. compressor as claimed in claim 10, it is characterised in that：Including helical-lobe compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721155917.4U CN207178219U (en) | 2017-09-08 | 2017-09-08 | Compressor air-discharging denoising structure and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721155917.4U CN207178219U (en) | 2017-09-08 | 2017-09-08 | Compressor air-discharging denoising structure and compressor |
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| Publication Number | Publication Date |
|---|---|
| CN207178219U true CN207178219U (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721155917.4U Active CN207178219U (en) | 2017-09-08 | 2017-09-08 | Compressor air-discharging denoising structure and compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401510A (en) * | 2017-09-08 | 2017-11-28 | 珠海格力电器股份有限公司 | Compressor air-discharging denoising structure and compressor |
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2017
- 2017-09-08 CN CN201721155917.4U patent/CN207178219U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401510A (en) * | 2017-09-08 | 2017-11-28 | 珠海格力电器股份有限公司 | Compressor air-discharging denoising structure and compressor |
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