CN218177399U - Noise eliminator and vacuum pump - Google Patents
Noise eliminator and vacuum pump Download PDFInfo
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- CN218177399U CN218177399U CN202222067006.3U CN202222067006U CN218177399U CN 218177399 U CN218177399 U CN 218177399U CN 202222067006 U CN202222067006 U CN 202222067006U CN 218177399 U CN218177399 U CN 218177399U
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Abstract
The application relates to the technical field of noise eliminator, specifically discloses a noise eliminator that this application provided, include: the silencer comprises a partition plate, a silencing box shell and a plurality of silencers; the exhaust channel of the nonlinear large cavity is provided by the baffle plate through the silencing box shell arranged between the air outlet of the vacuum pump and the air inlet of the silencer, so that the flow speed of the air flow exhausted by the vacuum pump is slowed down, the decelerated air flow is exhausted through the silencer, and the silencing effect on the air outlet of the vacuum pump is improved; the plurality of silencing air outlets are formed in the outlet of the exhaust channel of the silencing box shell and connected with the plurality of silencers, so that the influence of the whole silencing device on the air flow of the air outlet of the vacuum pump is reduced. The application also discloses a vacuum pump, has above-mentioned beneficial effect.
Description
Technical Field
The application relates to the technical field of noise elimination devices, in particular to a noise elimination device and a vacuum pump.
Background
The application of the vacuum pump in various negative pressure and air pressure control systems is more and more extensive at present; with the stricter noise requirements of various industries on equipment, the noise problem generated in the application process of the vacuum pump becomes a prominent problem in the research and development process of the equipment. The working noise generated by the vacuum pump is mostly from the air noise at the air outlet of the vacuum pump.
Fig. 1 is a schematic view illustrating the installation of a conventional silencing scheme for a vacuum pump.
As shown in fig. 1, a conventional solution for eliminating air noise at the vacuum pump air outlet 101 is to install a silencer 102 at the vacuum pump air outlet 101. A conventional silencer 102 has multiple sets of sound absorbing materials disposed in the outlet passage to absorb noise through small holes in the sound absorbing materials. However, because the air flow at the air outlet of the vacuum pump is rapid and the noise is large, the ideal noise removing effect is difficult to achieve by directly adding the common silencer. And the silencer directly arranged at the air outlet of the vacuum pump inevitably reduces the gas flow value at the air outlet, and the gas flow is an important index parameter in the work of the vacuum pump and must be reliably ensured.
The utility model provides a reduce the influence to vacuum pump gas outlet gas flow, improve the noise eliminator to vacuum pump gas outlet noise elimination effect, the technical problem that technical personnel in the field need solve.
SUMMERY OF THE UTILITY MODEL
The utility model provides a noise eliminator and vacuum pump for improve the noise elimination effect to vacuum pump gas outlet when reducing the influence to vacuum pump gas outlet gas flow.
In order to solve the above technical problem, the present application provides a muffler device, including: the silencer comprises a partition plate, a silencing box shell and a plurality of silencers;
the baffle plate is arranged in a sealing cavity of the silencing box shell to form an exhaust passage of a nonlinear large cavity; at the inlet of the exhaust channel, the silencing box shell is provided with a silencing air inlet used for being connected with an air outlet of a vacuum pump; at the outlet of the exhaust channel, the silencing box shell is provided with silencing air outlets which are connected with the air inlets of the silencers one by one;
the silencer is internally provided with a first sound-absorbing part.
Optionally, the sound absorbing component further comprises a second sound absorbing component;
the partition plate divides the sealed cavity into an air inlet cavity, a noise elimination cavity and an exhaust cavity along the air flow output direction, and the exhaust channel of a nonlinear large cavity is formed between the air inlet cavity and the noise elimination cavity and between the noise elimination cavity and the exhaust cavity; the silencing air outlet is arranged on the inner wall of the exhaust cavity close to the outside of the silencing box shell;
wherein, the second sound absorbing component is arranged in the noise removing cavity.
Optionally, the second sound-absorbing component is specifically an egg sound-absorbing cotton arranged on the inner wall of the denoising cavity.
Optionally, the both sides inner wall that the chamber of making an uproar is relative sets up the cotton arch of sound is inhaled to the egg is crisscross arranging.
Optionally, the second sound-absorbing member is specifically a louver fixed to an inner wall of the noise-canceling cavity.
Optionally, the louver blades are fixed on the inner walls of two opposite sides of the denoising cavity, and the louver blades arranged on the inner walls of two opposite sides of the denoising cavity are arranged in a staggered manner.
Optionally, the air inlet chamber further includes a planar sound absorbing cotton disposed on an inner wall of the air inlet chamber.
Optionally, the cross-sectional area of the air inlet cavity is larger than that of the air outlet of the vacuum pump, and the cross-sectional areas of the air inlet cavity are sequentially reduced from the muffling air inlet.
Optionally, the sound-absorbing box further comprises a heat dissipation component embedded in the sound-absorbing box shell.
In order to solve the technical problem, the present application further provides a vacuum pump, which includes the above silencing device, wherein a silencing air inlet of the silencing device is connected with an air outlet of the vacuum pump.
The application provides a noise eliminator, includes: the silencer comprises a partition plate, a silencing box shell and a plurality of silencers; the baffle plate is arranged in a sealing cavity of the silencing box shell to form an exhaust passage of a nonlinear large cavity; at the inlet of the exhaust passage, the silencing box shell is provided with a silencing air inlet used for being connected with the air outlet of the vacuum pump; at the outlet of the exhaust channel, the silencing box shell is provided with silencing air outlets which are connected with the air inlets of the silencers one by one; the silencer is internally provided with a first sound-absorbing component. The exhaust channel of the nonlinear large cavity is provided by the baffle plate through the silencing box shell arranged between the air outlet of the vacuum pump and the air inlet of the silencer, so that the flow speed of the air flow exhausted by the vacuum pump is slowed down, the decelerated air flow is exhausted through the silencer, and the silencing effect on the air outlet of the vacuum pump is improved; the plurality of silencing air outlets are arranged at the outlet of the exhaust channel of the silencing box shell and connected with the plurality of silencers, so that the influence of the whole silencing device on the air flow of the air outlet of the vacuum pump is reduced.
The application still provides a vacuum pump, has above-mentioned beneficial effect, no longer gives unnecessary details here.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic illustration of the installation of a prior art vacuum pump muffling scheme;
fig. 2 is a schematic structural diagram of a muffler device provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another muffler assembly provided in an embodiment of the present application;
fig. 4 is a schematic cross-sectional view of the muffler assembly shown in fig. 3.
Wherein 101 is a vacuum pump air outlet, 102 is a silencer;
201 is a clapboard, and 202 is a silencing box shell;
301 is the sound cotton is inhaled to the plane, 302 is the sound cotton is inhaled to the egg.
Detailed Description
The core of this application is to provide a noise eliminator and vacuum pump for improve the noise elimination effect to vacuum pump gas outlet when reducing the influence to vacuum pump gas outlet airflow.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of protection of the present application without any inventive step.
Example one
Fig. 2 is a schematic structural diagram of a muffler device according to an embodiment of the present application.
As shown in fig. 2, a muffler device provided in an embodiment of the present application includes: a partition 201, a sound attenuation box shell 202 and a plurality of sound attenuators 102;
the baffle plate 201 is arranged in a sealed cavity of the anechoic box shell 202 to form an exhaust passage of a nonlinear large cavity; at the inlet of the exhaust channel, the silencing box housing 202 is provided with a silencing air inlet for connecting with the vacuum pump air outlet 101; at the outlet of the exhaust passage, the sound attenuation box housing 202 is provided with sound attenuation air outlets connected with the air inlets of the sound attenuators 102 one by one;
the muffler 102 is provided with a first sound-absorbing member therein.
Note that, the direction of the arrow in fig. 2 is an airflow output direction.
It will be appreciated that a vacuum pump has only one outlet port and therefore only one muffler 102 can be connected. If the direct connection is adopted, only one muffler 102 can be connected to one vacuum pump. The silencing device provided by the embodiment of the application firstly provides a longer nonlinear large-cavity exhaust channel through the silencing box shell 202 with the partition plate 201 arranged inside, and the silencer 102 is not directly adopted for silencing the air flow at the vacuum pump air outlet 101, so that the flow speed of the air flow at the vacuum pump air outlet 101 can be reduced, and the influence on the air flow of the vacuum pump air outlet 101 is avoided. Therefore, after the flow velocity of the air flow at the vacuum pump air outlet 101 is softly reduced in the exhaust channel of the nonlinear large cavity, the air flow enters the plurality of mufflers 102 through the plurality of muffling air outlets at the outlet of the exhaust channel respectively for secondary muffling, at the moment, the flow velocity of the air flow is slow, and the muffling effect is better than that of a first muffling component in which high-speed air flow directly impacts the interior of the mufflers 102 by using the mufflers 102 for muffling, and the air flow is output through the plurality of mufflers 102, so that the influence on the air flow rate of the vacuum pump air outlet 101 is reduced.
In specific implementation, the installation manner of the partition boards 201 may be that two partition boards 201 are arranged in parallel and staggered along the direction of the muffling air inlet as shown in fig. 2, so that the air flow at the air outlet 101 of the vacuum pump is turned twice through the exhaust channel, thereby achieving the effect of softly slowing down the flow rate of the air flow. In addition, more than two baffles 201 may be provided, or different position relationships between the baffles 201 may be provided, forming exhaust passages including, but not limited to, L-shaped, Z-shaped, zigzag-shaped, or wave-shaped. And the sectional area of the inlet part of the exhaust passage is larger than that of the air outlet 101 of the vacuum pump, so that the high-speed airflow at the air outlet 101 of the vacuum pump enters the wide exhaust passage and then the flow speed is softly reduced, and the airflow at the air outlet 101 of the vacuum pump is prevented from directly impacting on a dense sound-absorbing material.
In addition, the sound absorbing component can also be arranged in the sealing cavity of the silencer provided by the embodiment of the application. If the sound absorbing member is attached to the inlet portion of the exhaust passage, the effect of blocking the flow direction of the airflow should be avoided as much as possible, and the effect of reducing the noise of the airflow should be reduced as little as possible, compared to the manner of attaching the first sound absorbing member to the muffler 102. When the sound absorbing member is mounted in the middle and rear portions of the exhaust passage, the mounting density can be increased, and the noise reduction effect can be improved. The sound-absorbing component can adopt sound-absorbing cotton.
The sound-deadening box housing 202 is preferably of a hard housing structure to prevent air noise from penetrating the housing to spread to the outside.
The principle of sound attenuation is to convert sound energy into other energy to be diffused, and generally to convert the sound energy into heat energy. In order to avoid overheating of the silencing device and further improve the noise reduction effect, the silencing box shell 202 and the partition plate 201 installed in the sealing cavity thereof can both adopt metal aluminum materials, so that excellent sound insulation and heat dissipation performance are provided, and airflow noise is completely shielded in the sealing cavity as much as possible. In addition, the silencing device provided by the embodiment of the application can further comprise a heat dissipation component embedded in the silencing box shell 202. The heat dissipating members may be disposed through the sound-damping box housing 202 and may be made of a metal material having good heat transfer properties.
Example two
FIG. 3 is a schematic structural diagram of another muffler assembly provided in an embodiment of the present application; fig. 4 is a schematic cross-sectional view of the muffler assembly shown in fig. 3.
On the basis of the above embodiments, the present application further provides a preferable muffler device.
As shown in fig. 3, the silencer device according to the embodiment of the present application further includes a second sound-absorbing member;
along the airflow output direction, the sealed cavity is divided into an air inlet cavity, a noise elimination cavity and an exhaust cavity by the partition plate 201, and nonlinear large-cavity exhaust channels are formed between the air inlet cavity and the noise elimination cavity and between the noise elimination cavity and the exhaust cavity; the silencing air outlet is formed in the inner wall of the exhaust cavity close to the outer part of the silencing box shell 202;
wherein the second sound-absorbing member is provided in the noise-canceling chamber.
Note that, the direction of the arrow in fig. 3 is an airflow output direction.
By adopting the scheme that two partition plates 201 are arranged in parallel and staggered in the direction of the silencing air inlet as shown in fig. 2 or other arrangement schemes, the partition plates 201 can divide the sealing cavity into the air inlet cavity, the denoising cavity and the exhaust cavity along the air flow output direction, and the exhaust channel with the nonlinear large cavity is formed between the air inlet cavity and the denoising cavity and between the denoising cavity and the exhaust cavity.
The sectional area of the air inlet cavity should be larger than that of the air outlet 101 of the vacuum pump, so that the high-speed airflow at the air outlet 101 of the vacuum pump enters the wide exhaust channel and then the flow speed is gently slowed down, and the airflow at the air outlet 101 of the vacuum pump is prevented from directly impacting on a dense sound-absorbing material.
Optionally, when the cross-sectional area of the air inlet cavity is larger than the cross-sectional area of the vacuum pump air outlet 101, the cross-sectional areas of the air inlet cavity are sequentially reduced from the muffling air inlet, so as to slowly improve the speed reduction effect on the air flow of the vacuum pump air outlet 101.
Optionally, the silencer device provided by the embodiment of the present application may further include a planar sound absorption cotton 301 disposed on the inner wall of the air intake cavity, so as to prevent airflow noise from being reflected and superimposed in the air intake cavity while absorbing sound and reducing noise.
And a second sound-absorbing component is arranged in the noise-removing cavity to obviously reduce noise of the airflow. As shown in fig. 3, the second sound-absorbing member may be egg sound-absorbing cotton 302 provided on the inner wall of the noise-removing chamber. In order to improve the noise reduction effect, as shown in fig. 3, the protrusions of the sound absorbing cotton 302 arranged on the inner walls of the two opposite sides of the noise removing cavity are arranged in a staggered manner.
It can be seen that combining 3 and 4, after the air current that slows down the velocity of flow through the chamber of admitting air got into the chamber of making an uproar, the striking was on the cotton 302 arch of sound is inhaled to the egg, and partly air current changes the flow direction, and another part air current then passes the egg and inhales the aperture on the cotton 302 arch of sound, and two kinds of modes all inhale the cotton 302 emergence friction with the egg, turn into heat energy with acoustic energy, reach apparent noise reduction.
Alternatively, a plurality of noise removing chambers may be provided, each of which forms a non-linear large chamber exhaust passage therebetween, and the noise absorbing members may be different in each noise removing chamber.
The air flow of the air outlet 101 of the vacuum pump slowly slows down the flow rate through the air inlet cavity, is subjected to noise reduction through the noise reduction cavity, enters the exhaust cavity, is dispersed into each silencer 102, is subjected to secondary noise reduction, and is discharged into the air, and the air flow at the moment has small flow rate and small noise.
The exhaust chamber should be designed to provide a large output surface facing the exterior of the sound box housing 202, and may be shaped including, but not limited to, in-line, dog-leg, spiral, etc.
On the basis, the sound attenuation box shell 202 and the partition plate 201 are made of aluminum materials, so that the heat conduction is good, and the heat energy converted from the sound energy can be timely dissipated to the ambient air in a heat conduction mode.
After passing through the exhaust path, the airflow exits the muffler case 202 through the plurality of mufflers 102, at which point the airflow noise has been reduced to a very low level, effectively eliminating air noise pollution. And the number of the silencers 102 arranged on the exhaust cavity is large, so that the bottleneck on the gas flow of the vacuum pump gas outlet 101 can be effectively avoided.
EXAMPLE III
In addition to the above-described embodiments, in the muffler device according to the embodiment of the present application, the second sound absorbing member is a louver fixed to the inner wall of the noise canceling chamber, differently from the second embodiment.
In specific implementation, metal materials can be adopted for each louver blade so as to achieve better heat dissipation. Can all be fixed with the shutter plate at the relative both sides inner wall in chamber of making an uproar of removing, and the shutter plate that the relative both sides inner wall in chamber of making an uproar of removing set up is crisscross arranges.
The arrangement direction of each louver blade can be horizontal or oblique. The arrangement mode of each louver blade can be the same or different. Optionally, the fixed position of each louver blade and the inner wall of the de-noising cavity can be provided with a rotating shaft, and the rotating shaft is connected with a power device (such as a combination of a motor and an electric cylinder) so as to achieve the effect of adjusting the arrangement direction of the louver blades, block the air flow in different degrees and obtain the optimal de-noising mode for the worker to test.
A plurality of through holes can be formed in the louver blades to increase the output path of airflow and increase the friction between the airflow and the louver blades, so that noise is further converted into heat energy which is diffused out through the louver blades.
Example four
On the basis of the above detailed description of various embodiments corresponding to the silencing device, the application also discloses a vacuum pump corresponding to the silencing device.
The vacuum pump provided by the embodiment of the application can comprise the silencing device provided by any one of the above items, and the silencing air inlet of the silencing device is connected with the vacuum pump air outlet of the vacuum pump.
Since the embodiment of the vacuum pump portion and the embodiment of the muffler portion correspond to each other, please refer to the description of the embodiment of the muffler portion for the embodiment of the vacuum pump portion, which is not repeated herein.
The silencer and the vacuum pump provided by the application are described in detail above. The embodiments are described in a progressive mode in the specification, the emphasis of each embodiment is different from that of other embodiments, and the same and similar parts among the embodiments are referred to each other.
It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A muffler assembly, comprising: the silencer comprises a partition plate, a silencing box shell and a plurality of silencers;
the baffle plate is arranged in a sealing cavity of the silencing box shell to form an exhaust passage of a nonlinear large cavity; at the inlet of the exhaust channel, the silencing box shell is provided with a silencing air inlet used for being connected with an air outlet of a vacuum pump; at the outlet of the exhaust channel, the silencing box shell is provided with silencing air outlets which are connected with the air inlets of the silencers one by one;
the silencer is internally provided with a first sound-absorbing part.
2. The muffling device of claim 1, further comprising a second sound-absorbing member;
the baffle plate divides the sealing cavity into an air inlet cavity, a noise elimination cavity and an exhaust cavity along the airflow output direction, and the exhaust channel of the nonlinear large cavity is formed between the air inlet cavity and the noise elimination cavity and between the noise elimination cavity and the exhaust cavity; the silencing air outlet is arranged on the inner wall of the exhaust cavity close to the outside of the silencing box shell;
wherein, the second sound absorbing component is arranged in the noise removing cavity.
3. The muffler device according to claim 2, wherein the second sound absorbing member is a sound absorbing cotton with egg-shaped sound absorbing material provided on an inner wall of the noise removing chamber.
4. The noise eliminator according to claim 3, wherein the protrusions of the sound absorbing cotton of the egg are arranged on the inner walls of the opposite sides of the noise eliminating cavity in a staggered arrangement.
5. The muffling device of claim 2, wherein the second sound-absorbing member is a louver fixed to an inner wall of the muffling chamber.
6. The muffling device of claim 5, wherein the louvers are fixed to the inner walls of the opposing sides of the muffling chamber, and the louvers are arranged in a staggered manner.
7. The muffling device of claim 2, further comprising planar sound-absorbing wool disposed on an inner wall of the intake chamber.
8. The muffling device of claim 2, wherein the cross-sectional area of the intake chamber is greater than the cross-sectional area of the vacuum pump outlet port, and the cross-sectional area of the intake chamber decreases sequentially from the muffling inlet port.
9. The muffling device of claim 1, further comprising a heat dissipating component embedded in the muffling cartridge housing.
10. A vacuum pump comprising a muffling apparatus according to any one of claims 1 to 9, the muffling apparatus having a muffled air inlet connected to a vacuum pump air outlet of the vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222067006.3U CN218177399U (en) | 2022-08-05 | 2022-08-05 | Noise eliminator and vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222067006.3U CN218177399U (en) | 2022-08-05 | 2022-08-05 | Noise eliminator and vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218177399U true CN218177399U (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222067006.3U Active CN218177399U (en) | 2022-08-05 | 2022-08-05 | Noise eliminator and vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218177399U (en) |
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- 2022-08-05 CN CN202222067006.3U patent/CN218177399U/en active Active
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