CN205190156U - Muffler and have its compressor - Google Patents
Muffler and have its compressor Download PDFInfo
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- CN205190156U CN205190156U CN201521015608.8U CN201521015608U CN205190156U CN 205190156 U CN205190156 U CN 205190156U CN 201521015608 U CN201521015608 U CN 201521015608U CN 205190156 U CN205190156 U CN 205190156U
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- expansion cavity
- baffler
- resonance part
- inner chamber
- main body
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Abstract
The utility model provides a muffler and have its compressor, the muffler includes: the dome main part has the inner chamber, first resonance portion sets up and is linked together in the dome main part and with the inner chamber, and the sound wave in the inner chamber takes place reflection and the noise of cancel each other out in order to reduce the inner chamber in first resonance portion. Set up the first resonance portion with dome main part inner chamber in the dome main part for reflection and cancel each other out take place for sound wave in the inner chamber in first resonance portion, play and reduce sound wave frequency in the inner chamber, thereby make the silencer play the effect of noise reduction. It eliminates the provocative strong dipole acoustic vibration noise of muffler effectively to set up first resonance portion. The utility model discloses the problem that the muffler noise is big among the effectual solution prior art.
Description
Technical field
The utility model relates to Compressor Technology field, in particular to a kind of baffler and the compressor with it.
Background technique
As shown in Figure 1 to Figure 3, the noise elimination of conventional muffler 10 ' adopts phase interference type baffler to suppress DIPOLE MODE noise.Its principle is arranged in the wave amplitude of DIPOLE MODE by two of baffler relief openings 11 ', under the prerequisite that the acoustic pressure amplitude of two relief openings 11 ' is identical with phase place, the doublet glottis neoplasms amplitude that two outlets are evoked is equal, and phase place is contrary, thus cancels out each other.
There is following defect in conventional muffler:
1, due to compressor cycle sex work, producing noise in the pump housing is microseismic noise, and the acoustic pressure amplitude being difficult to two relief openings ensureing baffler is identical with phase place.
2, easily eddy current crack is produced in baffler exhaust ports.
3, air-flow piercing device noise will be produced from relief opening high pressure draught out, cause compressor aerodynamic noise high.
Model utility content
Main purpose of the present utility model is the compressor providing a kind of baffler and have it, to solve the large problem of baffler noise of the prior art.
To achieve these goals, according to an aspect of the present utility model, provide a kind of baffler, comprising: dome main body, has inner chamber; First resonance part, to be arranged in dome main body and and intracavity inter-connection, the sound wave in inner chamber occurs to reflect and cancels out each other to reduce the noise of inner chamber in the first resonance part.
Further, the first resonance part comprises linkage section, the first end of linkage section and intracavity inter-connection.
Further, the first resonance part also comprises: the first expansion cavity, and the second end of linkage section is connected with the first expansion cavity, and the internal diameter of linkage section is R1, and the internal diameter of the first expansion cavity is R2, wherein, and R1 < R2; Outlet section, one end of outlet section is connected with the first expansion cavity, and the internal diameter of outlet section is R3, wherein, R3 < R2.
Further, the height of the first expansion cavity is H, H=0.25c/f, and wherein, c is the velocity of sound of the medium in the first expansion cavity, and f is the frequency of noise in inner chamber.
Further, the sound deadening capacity of the first expansion cavity is LTL, and LTL=10 × lg [1+1/4 (m-1/m) 2], wherein, m > 1, m is the divergence ratio of the first expansion cavity.
Further, m=S/S1, wherein, S is the area of the cross section of the first expansion cavity; S1 is the area of the cross section of linkage section.
Further, the number of the first resonance part is multiple.
Further, the number of the first resonance part is N, wherein, and 1≤N≤4.
Further, baffler also comprises: the second resonance part, and be arranged in dome main body, the second resonance part has the second expansion cavity; Wherein, the height of the first expansion cavity of the first resonance part is greater than the height of the second expansion cavity.
Further, baffler also comprises: the second resonance part, and be arranged in dome main body, the second resonance part has the second expansion cavity; Wherein, the internal diameter of the first expansion cavity of the first resonance part is greater than the internal diameter of the second expansion cavity.
Further, dome main body is decussate texture, and dome main body is provided with mounting hole, and the first resonance part and the second resonance part are arranged in the dome main body of decussate texture, and is positioned at the opposite side of mounting hole and the symmetry axis along mounting hole is arranged.
According to another aspect of the present utility model, provide a kind of compressor, comprise baffler, baffler is above-mentioned baffler.
Application the technical solution of the utility model, dome main body arranges the first resonance part with dome body lumen, the sound wave in inner chamber is made to occur reflect and cancel out each other in the first resonance part, play and reduce sound wave frequency in inner chamber, thus make silencing apparatus play the effect reducing noise.First resonance part is set and effectively can eliminates the strong dipole acoustic vibration noise that baffler excites.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of a kind of baffler in prior art;
Fig. 2 shows the structural representation of another kind of baffler in prior art;
Fig. 3 shows the side view of Fig. 2;
Fig. 4 shows the structural representation at first visual angle of the embodiment according to baffler of the present utility model;
Fig. 5 shows the structural representation at second visual angle of the embodiment according to baffler of the present utility model;
Fig. 6 shows the cross-sectional view of the embodiment of the resonance part according to baffler of the present utility model; And
Fig. 7 shows the cross-sectional view of the embodiment according to baffler of the present utility model.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10 ', baffler; 11 ', relief opening;
10, dome main body; 11, mounting hole; 20, the first resonance part; 21, the first expansion cavity; 22, linkage section; 23, outlet section; 30, the second resonance part; 31, the second expansion cavity; 32, the second linkage section; 33, the second outlet section.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As shown in Figure 4 and Figure 5, provide a kind of baffler according to the utility model, this baffler comprises dome main body 10 and the first resonance part 20.First resonance part 20 has inner chamber.First resonance part 20 to be arranged in dome main body 10 and and intracavity inter-connection, the sound wave in inner chamber occurs to reflect and cancels out each other to reduce the noise of inner chamber in the first resonance part 20.
In the present embodiment, dome main body 10 arranges the first resonance part 20 with dome main body 10 inner chamber, make the sound wave in inner chamber occur reflect and cancel out each other in the first resonance part 20, play and reduce sound wave frequency in inner chamber, thus make silencing apparatus play the effect reducing noise.First resonance part 20 is set and effectively eliminates the strong dipole acoustic vibration noise that baffler excites.
As shown in Figure 6, wherein, the first resonance part 20 comprises linkage section 22, the first end of linkage section 22 and intracavity inter-connection.First resonance part 20 also comprises the first expansion cavity 21 and outlet section 23.Second end of linkage section 22 is connected with the first expansion cavity 21, and the internal diameter of linkage section 22 is R1, and the internal diameter of the first expansion cavity 21 is R2, wherein, and R1 < R2.One end of outlet section 23 is connected with the first expansion cavity 21, and the internal diameter of outlet section 23 is R3, wherein, and R3 < R2.In dome main body 10 upper of baffler, set up the first expansion cavity 21 muffler structure.The noise reduction principle of the first expansion cavity 21 is the change expanded by the pipeline of the first expansion cavity 21, sound wave is formed in expanding duct and reflects and cancel out each other, effectively can reduce the aerodynamic noise in the pipeline of the first expansion cavity 21.Then the air-flow piercing device noise that baffler overall structure causes is effectively reduced.
Wherein, the internal diameter R1 of the linkage section 22 of the first resonance part 20 is arranged to the internal diameter R2 being less than the first expansion cavity 21, the internal diameter R3 of the outlet section 23 of the first resonance part 20 is arranged to be less than the first expansion cavity 21 internal diameter R2.Strengthen the performance muffler of baffler further.
Further, the height of the first expansion cavity 21 is H, H=0.25c/f, and wherein, c is the velocity of sound of the medium in the first expansion cavity 21, and f is the frequency of noise in inner chamber.The structure of the first expansion cavity 21 can be arranged according to the main noise frequency f in the inner chamber of dome main body 10, the structure of the corresponding a kind of expansion cavity of each main noise frequency f.Make baffler carry out noise reduction to noise targetedly like this, thus effectively add the sound deadening of baffler.
The sound deadening capacity of the first expansion cavity 21 is LTL, and LTL=10 × lg [1+1/4 (m-1/m) 2], wherein, m > 1, m is the divergence ratio of the first expansion cavity 21.Wherein, m=S/S1, S are the area of the cross section of the first expansion cavity 21.S1 is the area of the cross section of linkage section 22.Such setting further enhances the sound deadening of baffler, and wherein, lg [1+1/4 (m-1/m) 2] is a logarithmic function, and it represents with 10 for the truth of a matter, [1+1/4 (m-1/m)
2] be the logarithmic function of index.
As shown in Figure 4 and Figure 5, the number of the first resonance part 20 is multiple.Wherein, when only arranging first resonance part 20 and just can playing noise reduction, only first resonance part 20 can be set in dome main body 10.
Preferably, the number of the first resonance part 20 is N, wherein, and 1≤N≤4.Can arrange the number of resonance part according to the concrete structure of baffler, the number of the first resonance part 20 of general baffler just can reach good erasure effect at 1 to 4.Such setting can effectively reduce the noise in dome main body 10.
As shown in Figure 7, baffler also comprises the second resonance part 30.Second resonance part 30 is arranged in dome main body 10, and the second resonance part 30 has the second expansion cavity 31 and the second linkage section 32 and the second outlet section 33.Second linkage section 32 be connected with dome main body 10 and with the intracavity inter-connection of dome main body 10, the internal diameter of the second linkage section 32 is less than the internal diameter of the second resonance part 30.One end of second outlet section 33 is arranged on the second expansion cavity 31, and the other end of the second outlet section 33 is relief opening.Wherein, the height of the first expansion cavity 21 of the first resonance part 20 is greater than the height of the second expansion cavity 31.Namely the structure of the first resonance part 20 is different from the structure of the second resonance part 30, can carry out noise reduction for the noise of two kinds of different frequencies.
Preferably, the internal diameter of the first expansion cavity 21 of the first resonance part 20 is greater than the internal diameter of the second expansion cavity 31.Namely in the present embodiment, the height of the first expansion cavity 21 of the first resonance part 20 and internal diameter can be arranged to all different with internal diameter from the height of the second expansion cavity 31 of the second resonance part 30, also can be set to the identical and highly different expansion cavity of internal diameter.Also can be the expansion cavity that internal diameter is identical and highly not identical.Effective noise reduction can be carried out like this for the noise of different frequency.
Wherein, dome main body 10 is decussate texture.Dome main body 10 is provided with mounting hole 11, the first resonance part 20 and the second resonance part 30 are arranged in the dome main body 10 of decussate texture, and are positioned at the opposite side of mounting hole 11 and the symmetry axis along mounting hole 11 is arranged.Be arranged so that baffler has better performance muffler like this.
Baffler in above-described embodiment, can also be used in Compressor Technology field, and namely the utility model provides a kind of compressor, and this compressor comprises baffler, and baffler is the baffler in above-described embodiment.
By setting up expansion cavity muffler structure at baffler, the aerodynamic noise in pipeline effectively can be reduced.Expansion cavity muffler structure principle is the change by pipeline divergence ratio, make on the one hand sound wave in expanding duct namely in the first expansion cavity 21 of the present utility model or the second expansion cavity 31 formation reflect and cancel out each other; On the other hand baffler is effectively reduced in the pressure pulsation of exhaust ports, reduce the eddy current crack of exhaust ports.Simultaneously according to expansion cavity muffler structure, can set different bafflers, the noise for different frequency point carries out noise reduction.By adopting single expansion cavity or multiple expansion cavity structure, reaching and the multi-frequency section of compressor is eliminated the noise, reducing compressor noise with this.The compressor with this baffler is made to have good sound deadening.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect:
Application the technical solution of the utility model, dome main body arranges the first resonance part with dome body lumen, the sound wave in inner chamber is made to occur reflect and cancel out each other in the first resonance part, play and reduce sound wave frequency in inner chamber, thus make silencing apparatus play the effect reducing noise.First resonance part is set and effectively eliminates the strong dipole acoustic vibration noise that baffler excites.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (12)
1. a baffler, is characterized in that, comprising:
Dome main body (10), has inner chamber;
First resonance part (20), be arranged at described dome main body (10) upper and with described intracavity inter-connection, the sound wave in described inner chamber occurs to reflect and cancels out each other to reduce the noise of described inner chamber in described first resonance part (20).
2. baffler according to claim 1, is characterized in that, described first resonance part (20) comprises linkage section (22), the first end of described linkage section (22) and described intracavity inter-connection.
3. baffler according to claim 2, is characterized in that, described first resonance part (20) also comprises:
First expansion cavity (21), second end of described linkage section (22) is connected with described first expansion cavity (21), the internal diameter of described linkage section (22) is R1, the internal diameter of described first expansion cavity (21) is R2, wherein, R1 < R2;
Outlet section (23), one end of described outlet section (23) is connected with described first expansion cavity (21), and the internal diameter of described outlet section (23) is R3, wherein, R3 < R2.
4. baffler according to claim 3, is characterized in that, the height of described first expansion cavity (21) is H,
H＝0.25c/f，
Wherein, c is the velocity of sound of the medium in described first expansion cavity (21), and f is the frequency of noise in described inner chamber.
5. baffler according to claim 3, is characterized in that, the sound deadening capacity of described first expansion cavity (21) is LTL, and LTL=10 × lg [1+1/4 (m-1/m)
2], wherein, m > 1, m is the divergence ratio of described first expansion cavity (21).
6. baffler according to claim 5, is characterized in that, described m=S/S1, wherein,
S is the area of the cross section of described first expansion cavity (21);
S1 is the area of the cross section of described linkage section (22).
7. baffler according to claim 1, is characterized in that, the number of described first resonance part (20) is multiple.
8. baffler according to claim 7, is characterized in that, the number of described first resonance part (20) is N, wherein, and 1≤N≤4.
9. baffler according to claim 7, is characterized in that, described baffler also comprises:
Second resonance part (30), be arranged on described dome main body (10), described second resonance part (30) has the second expansion cavity (31);
Wherein, the height of first expansion cavity (21) of described first resonance part (20) is greater than the height of described second expansion cavity (31).
10. baffler according to claim 7, is characterized in that, described baffler also comprises:
Second resonance part (30), be arranged on described dome main body (10), described second resonance part (30) has the second expansion cavity (31);
Wherein, the internal diameter of first expansion cavity (21) of described first resonance part (20) is greater than the internal diameter of described second expansion cavity (31).
11. bafflers according to claim 9 or 10, it is characterized in that, described dome main body (10) is decussate texture, described dome main body (10) is provided with mounting hole (11), described first resonance part (20) and described second resonance part (30) are arranged in the dome main body (10) of described decussate texture, and are positioned at the opposite side of described mounting hole (11) and the symmetry axis along described mounting hole (11) is arranged.
12. 1 kinds of compressors, comprise baffler, it is characterized in that, the baffler of described baffler described in any one of claim 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521015608.8U CN205190156U (en) | 2015-12-08 | 2015-12-08 | Muffler and have its compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521015608.8U CN205190156U (en) | 2015-12-08 | 2015-12-08 | Muffler and have its compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205190156U true CN205190156U (en) | 2016-04-27 |
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ID=55783152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521015608.8U Active CN205190156U (en) | 2015-12-08 | 2015-12-08 | Muffler and have its compressor |
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| Country | Link |
|---|---|
| CN (1) | CN205190156U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317657A (en) * | 2015-12-08 | 2016-02-10 | 珠海凌达压缩机有限公司 | Silencer and compressor with same |
-
2015
- 2015-12-08 CN CN201521015608.8U patent/CN205190156U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317657A (en) * | 2015-12-08 | 2016-02-10 | 珠海凌达压缩机有限公司 | Silencer and compressor with same |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |