CN218882399U - Empty device, engine and vehicle of straining - Google Patents
Empty device, engine and vehicle of straining Download PDFInfo
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- CN218882399U CN218882399U CN202223318779.0U CN202223318779U CN218882399U CN 218882399 U CN218882399 U CN 218882399U CN 202223318779 U CN202223318779 U CN 202223318779U CN 218882399 U CN218882399 U CN 218882399U
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Abstract
The utility model belongs to the technical field of the engine, concretely relates to empty device, engine and vehicle of straining. Wherein, air inlet and gas outlet have been seted up on the casing of air filtering device, the inside of casing still is equipped with the first cavity of intercommunication air inlet and gas outlet, and the inside of casing still is equipped with the second cavity, and first cavity passes through the pipeline and communicates with the second cavity, and wherein, be equipped with a plurality of baffles in the first cavity, a plurality of air current passageways are separated into with first cavity to a plurality of baffles. According to the utility model discloses an air filtering device, through set up first cavity and second cavity in the casing, and a plurality of air flow channels are separated into by a plurality of baffles to first cavity, in-process that the air current flowed in by the air inlet and flowed by the gas outlet, a plurality of air flow channels are arranged in eliminating to the high frequency noise in the air current, and the low frequency noise in the air current gets into to eliminate in the second cavity via the pipeline to eliminate high frequency noise and the low frequency noise that mix with in the air current effectively, reduce or avoid noise pollution.
Description
Technical Field
The utility model belongs to the technical field of the engine, concretely relates to empty device, engine and vehicle of straining.
Background
The engine causes pressure pulsations in the intake pipe, thereby generating intake noise, and the frequency characteristics are expressed as low-frequency narrow-frequency characteristics (typically 200Hz to 400 Hz). Commercial car generally matches the booster, because the booster must intervene, produces the pneumatics BPF noise in the inlet duct (BPF noise is caused by the rotatory blade of pressure gas wheel and turbine) to transmit through air intake system, the frequency characteristic shows high frequency wide band characteristic (generally 7000Hz-9000 Hz), because the driver's cabin can't have better sound insulation to low frequency and high frequency noise and handle, seriously influences whole car sound quality.
The air filter in the prior art mostly adopts an expansion cavity silencer, generally has a silencing effect on low-frequency noise, but is limited to the performance requirement of an air filter element, and has no operability by changing the cavity volume and length of the air filter element to adjust the silencing frequency band and the silencing capability. In addition, the existing silencer is generally designed according to the plane waves in the pipeline, the influence of the high-order mode of the pipeline cannot be considered, the silencing frequency band of the silencer cannot be further widened, the silencing frequency of the silencer cannot be further improved, the plane wave frequency of the pipeline is generally concentrated within 4000Hz, if the silencing is carried out in a wider frequency band and a higher frequency, the structural size needs to be greatly changed, and the silencing effect is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the high-frequency air inlet noise and the low-frequency air inlet noise cannot be eliminated simultaneously and effectively at least. The purpose is realized by the following technical scheme:
the utility model discloses a first aspect provides an empty device of straining, a serial communication port, include:
the air inlet and the air outlet are arranged on the shell, a first cavity communicated with the air inlet and the air outlet is further arranged inside the shell, a second cavity is further arranged inside the shell, the first cavity is communicated with the second cavity through a pipeline, a plurality of baffles are arranged in the first cavity, and the first cavity is divided into a plurality of air flow channels by the baffles.
According to the utility model discloses an air filtering device, through set up first cavity and second cavity in the casing, and a plurality of air flow channels are separated into by a plurality of baffles to first cavity, in-process that the air current flowed in by the air inlet and flowed out by the gas outlet, a plurality of air flow channels are arranged in eliminating the high frequency noise in the air current, and the low frequency noise in the air current gets into to eliminate in the second cavity via the pipeline to eliminate high frequency noise and the low frequency noise that mix with in the air current effectively, reduce or avoid noise pollution.
In addition, according to the utility model discloses an empty device of straining still can have following additional technical characterstic:
in some embodiments of the present invention, the gas outlet and the gas outlet pipeline are further disposed between the first cavities, and the gas outlet pipeline is disposed with the pipeline.
In some embodiments of the present invention, the first cavity is provided with a first filter element inside, and the first filter element passes through the plurality of baffles.
In some embodiments of the present invention, a second filter element is disposed between the air inlet and the first cavity.
In some embodiments of the present invention, the housing is provided with an end cap for detachable connection at a position corresponding to the first filter element and the second filter element, respectively.
In some embodiments of the present invention, the baffle is provided with at least one 1/4 wave tube.
In some embodiments of the present invention, a plurality of connecting plates are further disposed on the plurality of baffles, and the plurality of connecting plates further separate the airflow channel.
In some embodiments of the present invention, an air inlet chamber is disposed between the housing and the first cavity, the air inlet chamber is communicated with the air inlet, and the air inlet chamber accommodates the first cavity.
A second aspect of the present invention provides an engine, including the above-mentioned air filter device.
A third aspect of the present invention provides a vehicle, including the above-mentioned engine.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated with like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a schematic structural view of an air filtering device according to an embodiment of the present invention;
fig. 2 schematically shows a front view of an air filter device according to an embodiment of the invention;
fig. 3 schematically shows a left side view of an air filtering device according to an embodiment of the present invention;
FIG. 4 is an experimental analysis diagram of the transmission loss in the high frequency noise band;
fig. 5 is an experimental analysis diagram of low-frequency noise band transmission loss.
The reference numbers are as follows:
100 is an air filtering device;
10 is a shell, 11 is an air inlet, and 12 is an air outlet;
20 is a first cavity, 21 is a first filter element;
30 is a second cavity, 40 is an air outlet pipeline, and 41 is a pipeline;
50 is an air inlet cavity, 60 is a baffle, 61 is a connecting plate, and 62 is a 1/4 wavelength tube
A second cartridge 70 and an end cap 80.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative term is intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "in ...below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 3, according to the embodiment of the present invention, an air filtering device 100 is provided, which includes a casing 10, an air inlet 11 and an air outlet 12 are provided on the casing 10, a first cavity 20 and a second cavity 30 are provided inside the casing 10, the first cavity 20 communicates the air inlet 11 with the air outlet 12, and the second cavity 30 is communicated with the first cavity 20 through a pipeline 41. The first chamber 20 is provided with a plurality of baffles 60 inside, and the baffles 60 may divide the first chamber 20 into a plurality of flow channels, and the flow is divided into a plurality of flows by the plurality of baffles 60.
According to the air filter device 100 of the present embodiment, the first cavity 20 and the second cavity 30 are disposed in the housing 10, and the first cavity 20 is divided into the plurality of flow channels by the plurality of baffles 60, the plurality of flow channels are used for eliminating high frequency noise in the air flow while low frequency noise in the air flow enters the second cavity 30 via the duct 41 to be eliminated in the process that the air flow enters from the air inlet 11 and flows out from the air outlet 12, so that the high frequency noise and the low frequency noise included in the air flow are effectively eliminated, and noise pollution is reduced or avoided.
Specifically, an air outlet pipeline 40 is further disposed between the first cavity 20 and the air outlet 12, and a plurality of pipelines 41 are disposed on the air outlet pipeline 40. The air flow is finally converged into the air outlet pipeline 40 and then discharged from the air outlet 12, the air outlet pipeline 40 is provided with a plurality of pipelines 41, the pipelines 41 are communicated with the second cavity 30, thus the noise elimination type of the Helminz resonant cavity is formed, the noise elimination frequency band and the noise elimination capability can be adjusted by changing the length and the diameter of the pipelines 41 or the volume of the second cavity 30, and the low-frequency noise is effectively eliminated. The number of the tubes 41 may be four, and the tubes are uniformly distributed on the circumference of the outlet duct 40.
It will be appreciated that the interior of the first chamber 20 is provided with a first filter cartridge 21, the first filter cartridge 21 passing through a plurality of baffles 60. The portion of the first cartridge 21 passing through the plurality of baffles 60 does not function as a filter because the baffles 60 block the portion of the first cartridge 21 passing through the baffles 60. The first filter element 21 is a fine filter element for fine filtering of the air flow, which can effectively remove impurities in the air flow. One part of the air flow passes through the first filter element 21 for filtering and then passes through the plurality of baffles 60 for eliminating high-frequency noise, and the other part of the air flow passes through the baffles 60 for eliminating the high-frequency noise and then passes through the first filter element 21 for filtering. The structure can reduce the area of the filtering surface of the air filter device 100 under the condition of the same filtering effect, and the pressure loss of the air filter device 100 is smaller.
Specifically, a second filter element 70 is disposed between the air inlet 11 and the first cavity 20. The second filter element 70 can be set outside the first filter element 21, or set at the bottom end of the air inlet 11. The second filter element 70 is a coarse filter element for coarse filtering of the air flow entering the first chamber 20 from the air inlet 11.
It will be appreciated that because the cartridges are periodically replaced, end caps 80 are provided at locations on the housing 10 corresponding to the first cartridge 21 and the second cartridge 70, respectively, and the end caps 80 are used to open the housing 10 for replacement of the cartridges. In order to ensure the sealing performance of the air filter device 100, the end caps 80 are wrapped with rubber sealing rings.
It is understood that the baffle 60 is further provided with at least one 1/4 wavelength tube 62 and at least one 1/4 wavelength tube 62, so that the air filter device 100 can further improve the effect of eliminating high-frequency noise.
It can be understood that a plurality of connecting plates 61 can be further disposed on the baffle 60, and two ends of the connecting plates 61 are respectively connected to two baffles 60, so that the connecting plates 61 further divide the air flow channel into more air flow channels. Therefore, the airflow channel with the large cross section is divided into the airflow channels with the parallel small cross sections, the cut-off frequency of the radial mode is improved, the generation of a high-order acoustic mode is further inhibited, and high-order noise is reduced.
Specifically, an air inlet cavity 50 is arranged between the housing 10 and the first cavity 20, the air inlet cavity 50 is communicated with the air inlet 11, and the air inlet cavity 50 accommodates part of the first cavity 20. The air inlet chamber 50 is used to store air flow and can increase the flow of air through the second filter element 70.
The specific principle of the noise elimination of the present embodiment is that the air flow enters the air inlet cavity 50 from the air inlet 11, and then passes through the second filter element 70 from the air inlet cavity 50, so as to filter out larger impurities in the air. The air flow passing through the second filter element 70 is divided into two parts, one part directly enters the plurality of baffle plates 60 through the air flow to perform high-frequency noise elimination, then fine filtration is performed when the air flow passes through the first filter element 21, and the other part of the air flow firstly passes through the fine filtration of the first filter element 21 and then enters the plurality of baffle plates 60 to perform high-frequency noise elimination. The air flow is merged in the air outlet pipeline 40, and the pipeline 41 in the air outlet pipeline 40 is connected with the second cavity 30, so that the low-frequency noise is eliminated. The air flow finally exits the air filter assembly 100 through the outlet duct 40 from the air outlet 12 and into the engine.
In order to account for the loss of high and low frequency noise, the sound waves of the inlet 11 and outlet 12 ducts will no longer propagate in the form of plane waves, for which the effect of higher order modes is taken into account. According to the pipeline acoustic modal theory, the inlet and outlet boundary conditions of the silencer are designed to have axial symmetry, the circumferential modal of the pipeline cannot be excited, and the radial modal of the pipeline is suppressed through the silencer. When the plane wave is given at the inlet and the impedance boundary condition is given at the outlet by applying the analytic method, the transmission loss formula is as follows:
TL＝-20lg((a 2 /a 1 )*E 0 )
in the formula, E 0 Amplitude coefficient of 0 order mode (plane wave) of the exit transmitted wave; a is 1 、a 2 Respectively the radius of the inlet and outlet pipelines.
Through calculation, the noise transmission loss is above 15dBA (shown in figure 4) in a high-frequency noise band (7000 Hz-9000 Hz), and the noise transmission loss is above 30dBA (shown in figure 5) in a low-frequency noise band (200 Hz-400 Hz), so that the noise-proof air filter element has good noise elimination capability in a problem frequency band.
The embodiment also provides an engine, which comprises the air filter device 100, wherein the air flow subjected to noise elimination and filtration by the air filter device 100 enters the engine.
The embodiment also provides a vehicle comprising the engine.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An air filtering device, comprising:
the air inlet and the air outlet are arranged on the shell, a first cavity communicated with the air inlet and the air outlet is further arranged inside the shell, a second cavity is further arranged inside the shell, the first cavity is communicated with the second cavity through a pipeline, a plurality of baffles are arranged in the first cavity, and the first cavity is divided into a plurality of air flow channels by the baffles.
2. The air filtering device according to claim 1, wherein an air outlet pipeline is further arranged between the air outlet and the first cavity, and the pipeline is arranged on the air outlet pipeline.
3. The air filtering device according to claim 1, wherein a first filter element is arranged inside the first cavity, and the first filter element passes through the plurality of baffle plates.
4. An air filtering device according to claim 3, wherein a second filter element is arranged between the air inlet and the first chamber.
5. The air filter device according to claim 4, wherein the housing is provided with detachably connected end caps at positions corresponding to the first filter element and the second filter element, respectively.
6. An air filtering device according to claim 1, wherein the baffle plate is provided with at least one 1/4 wave tube.
7. The air filtering device according to claim 1, wherein a plurality of connecting plates are further provided on the plurality of baffle plates, and the plurality of connecting plates further divide the air flow channel.
8. The air filtering device according to claim 1, wherein an air inlet cavity is arranged between the casing and the first cavity, the air inlet cavity is communicated with the air inlet, and the air inlet cavity accommodates part of the first cavity.
9. An engine comprising an air filter device according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the engine of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223318779.0U CN218882399U (en) | 2022-12-08 | 2022-12-08 | Empty device, engine and vehicle of straining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223318779.0U CN218882399U (en) | 2022-12-08 | 2022-12-08 | Empty device, engine and vehicle of straining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218882399U true CN218882399U (en) | 2023-04-18 |
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ID=85977329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223318779.0U Active CN218882399U (en) | 2022-12-08 | 2022-12-08 | Empty device, engine and vehicle of straining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218882399U (en) |
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2022
- 2022-12-08 CN CN202223318779.0U patent/CN218882399U/en active Active
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