CN106468211A - Automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method - Google Patents
Automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method Download PDFInfo
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- CN106468211A CN106468211A CN201510505094.2A CN201510505094A CN106468211A CN 106468211 A CN106468211 A CN 106468211A CN 201510505094 A CN201510505094 A CN 201510505094A CN 106468211 A CN106468211 A CN 106468211A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 230000003584 silencer Effects 0.000 claims description 23
- 230000030279 gene silencing Effects 0.000 claims description 21
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 1
- 230000008030 elimination Effects 0.000 abstract description 16
- 238000003379 elimination reaction Methods 0.000 abstract description 16
- 230000000644 propagated effect Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 12
- 230000004048 modification Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000012938 design process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
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Abstract
A kind of automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method, wherein acoustic filter includes：Connect to the breather of described gas outlet, there is body and the tube chamber being located in described body；Housing, is closely connected outside described body and with described body, is provided with noise elimination cavity in described housing；Connect the filtering part of described noise elimination cavity and tube chamber, described filtering part is used for：Filter the described high-frequency noise propagated in described tube chamber to dissipate to noise elimination cavity.The technical program is provided with the acoustic filter for filter high frequency noise in the gas outlet of supercharger, the filtered part of high-frequency noise at supercharger gas outlet filters and dissipates to noise elimination cavity, acoustic filter realizes noise reduction sound-deadening in the gas outlet of supercharger to high-frequency noise, reduces sound pollution during supercharger work.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile, an engine, a silencer arranged at an air outlet of a supercharger and a forming method.
Background
The existing automobile engine is provided with a supercharger, and the supercharger is used for pre-compressing air before the air enters an air cylinder so as to improve the air density and increase the air inflow, thereby improving the power of the engine and the economy.
The supercharger can generate noise during operation, causing noise pollution, which can result from pressure relief valves in the supercharger. The pressure release valve is used for controlling the boost pressure of the supercharger, the booster is guaranteed to output the boost gas when the pressure release valve is closed, but when the boost pressure is too large, the pressure release valve can be opened, redundant air is released into the atmosphere, the pressure in an air inlet channel of the air cylinder is reduced, and the air inlet channel is protected. The noise is emitted when the pressure relief valve exhausts.
The detection shows that the low-frequency noise in the supercharger noise can be transmitted to the air inlet end of the supercharger, the high-frequency noise can be transmitted to the air outlet end of the supercharger, and the frequency range of the low-frequency noise and the frequency range of the high-frequency noise can be respectively obtained through detection. The existing noise elimination scheme for the noise of the supercharger is as follows: the silencer such as a Helmholtz resonant cavity, an 1/4 wave tube and the like is connected to the air inlet end of the supercharger, and the schemes have good silencing effect on low-frequency noise transmitted to the air inlet end of the supercharger. However, the high-frequency noise propagated to the air outlet end of the supercharger cannot be eliminated, so that noise pollution is caused.
Disclosure of Invention
The invention solves the problem that high-frequency noise transmitted to the air outlet of the supercharger cannot be eliminated when the supercharger works, thereby causing noise pollution.
In order to solve the above problems, the present invention provides a muffler for an air outlet of a supercharger of an automobile, wherein high frequency noise generated when the supercharger operates is transmitted to the air outlet, the muffler comprising:
a vent tube connected to the air outlet, having a tube body and a tube cavity located within the tube body;
the shell is arranged outside the pipe body and is hermetically connected with the pipe body, and a silencing cavity is arranged in the shell;
the filter that communicates anechoic chamber and lumen, the filter is used for: and filtering the high-frequency noise transmitted in the pipe cavity to be dissipated in the anechoic cavity.
Optionally, the filter includes: the grid bars are arranged in parallel at equal intervals, and gaps are formed between every two adjacent grid bars;
setting the distance between two adjacent grid bars according to the acoustic wave wavelength range of the high-frequency noise, so that the high-frequency noise can pass through the gap between the two adjacent grid bars and enter the muffling cavity;
and setting the width of each grid bar according to the half-wavelength range of the high-frequency noise sound wave to enable the high-frequency noise sound wave entering the silencing cavity to be subjected to interference cancellation, wherein the width is the size of the grid bars along the arrangement direction of all the grid bars.
Optionally, a tube body between the anechoic chamber and the lumen has formed therein: the arc-shaped strip seams are arranged at equal intervals along the axial direction of the pipe body, and the arc-shaped strips are positioned between every two adjacent arc-shaped strip seams;
the arc-shaped strip seam is used as the gap, and the arc-shaped strip is used as the grid strip.
Optionally, a tube body between the anechoic chamber and the lumen has formed therein: the straight strip-shaped seams are arranged at equal intervals along the circumferential direction of the pipe body, and the straight strips are positioned between every two adjacent straight strip-shaped seams;
the straight strip type seam is used as the gap, and the straight strip is used as the grid strip.
Optionally, the filter includes: the plurality of round holes are arranged in the tube body and are communicated with the silencing cavity and the tube cavity;
setting the aperture of each round hole according to the acoustic wave wavelength range of the high-frequency noise, so that the high-frequency noise can pass through the round holes to enter the silencing cavity;
and setting the hole distance between two adjacent circular holes according to the half-wavelength range of the high-frequency noise sound wave, so that the interference of the high-frequency noise sound wave entering the silencing cavity is cancelled.
Optionally, all the round holes are arranged in the following manner: the pipe body is arranged in a crossed manner along the axial direction of the pipe body and the circumferential direction of the pipe body.
Optionally, the muffler comprises at least two shells spaced apart from each other, each shell being provided with one of the muffling chambers; or at least two silencing cavities separated from each other are formed in the shell;
each muffling cavity is correspondingly provided with one filtering piece, and every two filtering pieces are respectively used for filtering the high-frequency noise with different sound wave frequency ranges.
Optionally, at least two of the muffling chambers are formed in the housing in a spaced manner;
the casing is a closed annular structure surrounding the central axis of the pipe body, and all the muffling cavities are separated from each other along the circumferential direction of the pipe body.
Optionally, the tube and housing are made of a high temperature resistant material capable of resisting the temperature of the gas circulating in the supercharger.
Optionally, the high temperature resistant material is nylon.
Optionally, the connection mode of the shell and the pipe body is as follows: and (7) welding and connecting.
The invention also provides an automobile engine, which comprises a supercharger with an air outlet and the silencer, wherein the silencer is connected to the air outlet through the vent pipe.
Optionally, the air outlet of the supercharger is connected with an air outlet pipe, and the vent pipe is connected with the air outlet pipe through a quick connector; or,
the vent pipe is connected to the air outlet as an air outlet pipe.
The invention further provides an automobile comprising the engine.
The invention also provides a forming method of the silencer arranged at the air outlet of the automobile supercharger, which comprises the following steps:
forming a breather pipe, wherein the breather pipe is provided with a pipe body and a pipe cavity positioned in the pipe body, a filtering part is formed in the pipe body, the filtering part comprises a plurality of gaps which are arranged at equal intervals and grid bars positioned between every two adjacent gaps, and the gaps penetrate through the pipe body along the radial direction of the pipe body;
forming a shell, wherein a silencing cavity and an opening communicated with the silencing cavity are formed in the shell;
operating the opening of the housing to align with and surround the filter outside the tube;
after alignment, the housing is manipulated into sealing engagement with the tubular body.
Optionally, before aligning the opening of the housing with the filter, performing a melting process on a region of the housing enclosing the opening and/or a region of the tube body enclosing the filter to form a melting region;
the method for operating the shell to be hermetically connected with the pipe body comprises the following steps:
operating the shell and the pipe body to be welded and pressed through the melting area;
and after the pressing, cooling treatment is carried out, and the shell is welded with the pipe body.
Optionally, the method for forming the filter includes:
a plurality of gaps which are arranged in parallel at equal intervals are formed in the pipe wall of the pipe body, and the pipe body part between every two adjacent gaps is used as the grid bar;
the grid bars and the gaps form the filtering piece.
Optionally, the gaps are arc-shaped strip seams surrounding the central axis of the pipe body, all the arc-shaped strip seams are arranged at equal intervals along the axial direction of the pipe body, and the grid bars are two adjacent arc-shaped strips between the arc-shaped strip seams.
Optionally, the gap is a straight strip-shaped seam parallel to the central axis of the pipe body, all the straight strip-shaped seams are arranged at equal intervals along the circumferential direction of the pipe body, and the grid strip is a straight strip between two adjacent straight strip-shaped seams.
Optionally, the method of forming the vent tube is an injection molding process.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the technical scheme, the silencer used for filtering high-frequency noise is arranged at the air outlet of the supercharger, the high-frequency noise at the air outlet of the supercharger is filtered by the filtering piece to be dissipated in the silencing cavity, and the silencer is used for reducing noise and eliminating noise of the high-frequency noise at the air outlet of the supercharger and reducing noise pollution of the supercharger during working. The high-frequency noise sound wave frequency range can be detected and obtained in the whole vehicle test stage, and then the corresponding filtering piece is arranged according to the high-frequency noise sound wave frequency range, and the filtering piece can filter the high-frequency noise corresponding to the sound wave frequency range.
Drawings
FIG. 1 is a perspective view of a muffler of an embodiment of the present invention assembled to an automobile engine, further showing the positional relationship of the muffler to a supercharger and a rubber tube;
FIG. 2 is a perspective view of a muffler of an embodiment of the present invention with a rubber tube attached, wherein the muffler shell exposes the muffler chamber;
FIG. 3 is a cross-sectional view of a muffler of an embodiment of the present invention, wherein the cross-section is parallel to and through the central axis of the vent tube body;
FIG. 4 is a partial cross-sectional view of a vent tube body in a muffler according to a modification, wherein the cross-section is parallel to and passes through the central axis of the tube body;
FIG. 5 is a cross-sectional view of a muffler according to another modification, in which the cross-section is perpendicular to the central axis of the snorkel body and passes through the housing;
fig. 6 is a schematic diagram showing the relationship between the sound-deadening ability and the sound wave frequency of high-frequency noise when the muffler shown in fig. 1 is used in a general passenger car.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1 to 3, the present embodiment provides an automobile engine, including a supercharger 1 and a cylinder (not shown in the drawings), where the supercharger 1 has an air outlet 10, the air outlet 10 is connected to an air outlet pipe 11, and high-frequency noise generated by the supercharger 1 during operation is transmitted to the air outlet pipe 11;
outlet duct 11 is connected with silencer 2, and silencer 2 includes:
the breather pipe 3 is provided with a pipe body 30 and a pipe cavity 31, two ends of the pipe body 30 are respectively connected with the air outlet pipe 11 and the rubber pipe 7, the rubber pipe 7 is used for being connected to the intercooler 8, and the pipe cavity 31 is respectively communicated with the air outlet pipe 11 and the rubber pipe 7 and is used as a circulation channel for the exhaust gas of the supercharger;
the shell 4 is arranged outside the pipe body 30 and is hermetically connected with the pipe body 30, and the shell 4 is internally provided with a silencing cavity 5 and an opening 50 communicated with the silencing cavity 5;
a filter member 6 communicating between the muffling chamber 5 and the lumen 31, wherein the filter member 6 is located within the opening 50, the filter member 6 being configured to: high-frequency noise propagating in the lumen 31 is filtered and dissipated in the anechoic chamber 5.
Compared with the prior art, the technical scheme is that the silencer 2 for filtering high-frequency noise sound waves is arranged at the air outlet 10 of the supercharger 1, and the frequency of the high-frequency noise sound waves is about more than 1500 Hz. The noise reduction and elimination of high-frequency noise are realized at the air outlet of the supercharger 1, and the noise pollution of the supercharger 1 during working is reduced. The muffler 2 of this technical scheme can be used to multiple motorcycle type. The frequency range of the high-frequency noise sound wave at the air outlet 10 of the supercharger 1 is close to that of the same vehicle type, but the frequency range of the high-frequency noise sound wave at the air outlet 10 of the supercharger 1 is different for different vehicle types. The high-frequency noise sound wave frequency range can be detected and obtained in the whole vehicle test stage, then the corresponding filtering piece 6 is arranged according to the high-frequency noise sound wave frequency range, and the filtering piece 6 can filter the high-frequency noise corresponding to the sound wave frequency range.
Referring to fig. 2 and 3, the filter 6 includes: a plurality of grid bars 60 which are arranged at equal intervals along the axial direction of the tube body 30, a gap 61 is formed between two adjacent grid bars 60, the gap 61 is communicated with the muffling cavity 5 and the tube cavity 31, and the grid bars 60 and the gap 61 are formed in the tube body 30;
the distance w1 between two adjacent grid bars 60 is set according to the wavelength range of the sound wave of the high-frequency noise, so that the high-frequency noise can pass through the gap 61 between two adjacent grid bars 60 and enter the anechoic cavity 5. According to the principle of sound wave diffraction, when the distance w1 between two adjacent grating bars 60 is less than or equal to the wavelength of the high-frequency noise sound wave, the high-frequency noise sound wave can pass through the gap 61. In reality, the wavelength of the sound wave in the high-frequency noise generated when the supercharger works is not constant but fluctuates within a certain range, so in the specific design process, the distance w1 between the two grid bars 60 is reasonably set according to the detected wavelength range of the sound wave of the high-frequency noise, and most of the high-frequency noise can penetrate into the muffling cavity 5 from the gap 61. Although the high-frequency noise sound wave having a wavelength slightly smaller than the distance w1 cannot pass through the gap 61 completely, the energy of the high-frequency noise can be consumed as long as a part of the high-frequency noise sound wave can pass through the gap.
Thus, the filter member 6 can filter high frequency noise in a certain frequency range.
The width w2 of each grating 60 is set according to the half wavelength range of the high frequency noise sound wave, so that the high frequency noise sound waves entering the muffling chamber 5 interfere with each other and are dissipated in the muffling chamber 5, wherein the width w2 is the dimension of the grating 60 in the arrangement direction of all the gratings 60. According to the principle of sound wave interference, when the width w2 of each grating 60 is equal to an odd multiple of the half wavelength of the high frequency noise sound wave, the plurality of high frequency noise sound waves entering the muffling chamber 5 from the plurality of gaps 61 interfere with each other to cancel each other. It should be noted that, in general, the wavelength of the high-frequency noise sound wave at the outlet of the supercharger is floating within a certain range, so in the specific design process, the width w2 of the grid bar 60 should be set reasonably according to the detected wavelength range of the high-frequency noise sound wave, so as to ensure that the high-frequency noise can dissipate most of the energy in the muffling chamber 5.
In this embodiment, the grid bars 60 are arc bars that are disposed in the tube body 30 and surround the central axis of the tube body 30, and all the arc bars are arranged at intervals along the axial direction of the tube body 30. The forming mode of the grid bars 60 at this time is as follows: in the process of forming the pipe body 30, a plurality of arc-shaped slits arranged at equal intervals are formed in the side wall of the pipe body 30 as gaps 61, and the arc-shaped bar between two adjacent arc-shaped slits 34 is used as a grid bar 60. Wherein, the arrangement direction of all the grid bars 60 is parallel to the axial direction of the tube body 30.
As a modification, referring to fig. 4, the following may be adopted: the pipe body 30 'is provided with a plurality of strip-shaped straight-strip-shaped slits 61' arranged at equal intervals along the circumferential direction B of the pipe body 30 'at positions corresponding to the openings of the muffling chamber, the straight strip between two adjacent straight-strip-shaped slits 61' is used as a grid 60', the grid 60' is straight, and the length direction of the grid 60 'is parallel to the axial direction of the pipe body 30'.
The technical scheme is provided with the grid bars, and the high-frequency noise is dissipated by utilizing the principle of sound wave interference cancellation, so that the purposes of noise reduction and noise elimination are achieved.
As a modification, referring to fig. 5, the following may be adopted: the filter 600 includes: a plurality of circular holes 601 which are arranged in the tube body 300 and communicate the muffling cavity 500 with the tube cavity 301;
the aperture r of each circular hole 601 is smaller than or equal to the wavelength of the high-frequency noise, so that the high-frequency noise can pass through the circular holes 601;
the pitch between two adjacent circular holes 601 is equal to odd times of half wavelength of the high frequency noise sound wave, so that the high frequency sound waves entering the muffling cavity 500 interfere with each other and are cancelled. Further, all the circular holes 601 are arranged in the following manner: the circular holes 601 are arranged crosswise in the axial direction of the tube body 300 and in the circumferential direction of the tube body 300, so that they form a grid.
Therefore, it can be inferred from the technical solution of the present embodiment and the above modifications that the filter has various design solutions to satisfy the requirements of high frequency noise filtering and interference cancellation.
In this embodiment, referring to fig. 2 and 3, the opening 50 of the muffling chamber 5 surrounds a part of the outer surface of the pipe body, which is a curved surface, in which the filter 6 is disposed, wherein the ratio of the sum of the areas of the curved surface occupied by all the gaps 61 in the filter 6 to the total area of the curved surface is the perforation rate. The larger the perforation rate is, the larger the high-frequency sound wave energy filtered by the filter member 6 is, and the larger the noise energy dissipated by the muffler 2 is. Therefore, under the permission of space size, the grid bars 60 should be arranged as many as possible corresponding to high-frequency Noise in a sound wave frequency range, so that the perforation rate is improved, a better Noise reduction and Noise elimination effect is obtained, and the NVH (Noise, Vibration, Harshness) performance of the automobile is improved. Or, the gaps 61 are designed to have a longer length along the circumferential direction of the pipe body 30, which can increase the area of the arc surface occupied by a single gap 61, increase the area of all the gaps 61 occupying the arc surface, and further increase the perforation rate.
In the present embodiment, two muffling chambers 5 are formed in the housing 4, the two muffling chambers 5 are separated from each other, the muffling chambers 5 and the filter members 6 are in one-to-one correspondence with each other along the axial direction of the pipe body 30, and two filter members 6a and 6b are provided corresponding to the two muffling chambers 5;
the adjacent two grating bars 60a in the filter 6a are spaced apart by w1, the width of the grating bar 60a is w2, the adjacent two grating bars 60b in the other filter 6b are spaced apart by w 1', and the width of the grating bar 60b is w 2'. W1 is smaller than w1 'and w2 is smaller than w 2', so that the corresponding filter 6a can filter high-frequency noise with shorter wave length and higher frequency; the filter 6b can filter high-frequency noise with a longer acoustic wave length and a lower frequency. By such a design, the two filter members 6a and 6b are respectively used for filtering high-frequency noise with different sound wave frequency ranges, so that the purpose of noise reduction and noise elimination of the high-frequency noise in the two frequency ranges is achieved.
The filtering effect of the muffler 2 according to the present invention will be described below by taking a common passenger car as an example. The sound wave frequency of the high-frequency noise at the air outlet of the supercharger in the common passenger car is about more than 1500Hz, refer to fig. 3 and 6, and fig. 6 is a schematic diagram of the relation between the sound-deadening capacity and the sound wave frequency of the high-frequency noise when the muffler 2 of the technical scheme is used in the common passenger car, wherein the sound-deadening capacity of the muffler 2 corresponding to the sound wave frequency range of 1500Hz to 2300Hz is high, and the sound wave frequency reaches the highest value near 1960Hz and is close to 45; the silencer 2 corresponding to the sound wave frequency range of 2300Hz to 3240Hz has high silencing capability and reaches the highest value near 2840Hz, which is close to 45. The noise reduction capability of the silencer 2 is used for representing the noise reduction and noise elimination capability of the silencer 2, namely the noise transmission loss of high-frequency noise after being eliminated by the silencer 2, and can be represented by a high-frequency noise decibel value which can be eliminated by the silencer 2, wherein the higher the high-frequency noise decibel which can be eliminated by the silencer 2 is, the higher the noise reduction and noise elimination capability of the silencer 2 is, and the better the NVH performance of the automobile is.
As can be seen from fig. 5, in the technical scheme, the filtering parts 6a and 6b can meet the noise reduction and noise elimination requirements of high-frequency sound waves in two sound wave frequency ranges, the noise elimination capability of the silencer 2 is high, and the subjective evaluation score of a user on the NVH performance of the whole vehicle is improved to 6.5-7.5.
As a modification, more than two muffling chambers spaced from each other and a filter corresponding to each muffling chamber may be provided in one housing, so that high-frequency noise in a plurality of different sound wave frequency ranges may be filtered as much as possible, and the muffling ability of the muffler may be higher, if the assembly space allows.
As another modification, it is also possible to: the silencer comprises at least two shells, wherein all the shells are arranged on the pipe body at intervals, and each shell is correspondingly provided with a silencing cavity and a corresponding filtering piece.
As still another modification, the following may be applied: the casing design is the annular enclosed construction who encircles the breather pipe body axis, and a plurality of noise elimination chambeies and the filtering piece that corresponds of interval arrangement each other are designed to the circumferential direction along the breather pipe body.
Further, when the sound wave frequency in the high-frequency noise is concentrated in a certain sound wave frequency range, the filter corresponding to the sound wave frequency range can be designed to have a larger perforation rate compared with other filter, and accordingly, the volume of the muffling cavity corresponding to the sound wave frequency range is larger than the volume of other muffling cavities, so that enough space is provided for dissipating the high-frequency noise. For example, the volume of the muffling chamber 5 corresponding to the filter 6b is larger than the volume of the other muffling chamber 5.
The muffler 2 can achieve good noise reduction and elimination effects, but in the application process, referring to fig. 1 to 3, the temperature of the gas output from the supercharger 1 and the working occasion of the supercharger 1 is high, so that the pipe body 30 and the shell 4 of the breather pipe 3 in the technical scheme are both made of high-temperature resistant materials, and the high-temperature materials are used for resisting the high temperature of the gas flowing in the pipe cavity 31 and preventing the deformation of the pipe body 30 and the shell 4. Wherein the type of the high temperature resistant material has various choices, such as nylon, high temperature resistant metal, etc. The technical scheme selects PA66 type nylon.
The manufacturing process of the silencer 2 by using the nylon material comprises the following steps:
first, the vent tube 3 is formed, and the vent tube 3 has a tube body 30 and a tube cavity 31 inside the tube body 30. A plurality of arc-shaped gaps 61 arranged in parallel and grid bars 60 between two adjacent gaps 61 are formed in the pipe wall of the pipe body 30, and all the grid bars 60 and the gaps 61 form the filter 6. Wherein the air tube 3 is formed using an injection molding process, and the filter 6 and the tube body 30 are integrally formed. Other mold forming processes may be used to form the tube body 30 and the filter member 6, in addition to the injection molding process.
Next, the housing 4 is formed, and the muffling chamber 5 and the opening 50 communicating with the muffling chamber 4 are formed in the housing 4. Wherein the housing 4 is formed using an injection molding process or other mold forming process.
Next, outside the tubular body 30, the opening 50 of the operating housing 4 is aligned with the filter element 6 and the opening 50 surrounds the filter element 6. After alignment, the operating housing 4 is connected to the tubular body 30 in a sealed manner.
In this embodiment, the connection mode between the housing 4 and the pipe body 30 is welding, and the welding mode is:
before aligning the opening 50 of the housing 4 with the filter 6, performing a melting process on an area of the housing 4 surrounding the opening 50 and an outer surface of an area of the tube body 30 surrounding the filter 6, forming a first melting area in the housing 4 and a second melting area in the tube body 30;
then, the opening 50 of the operation housing 4 is aligned with the filter 6, and the first melting area and the second melting area are welded and pressed tightly;
finally, after cooling, the housing 4 and the tube 30 are welded to form an integral structure.
In this embodiment, the filter member 6 and the tube 30 are integrally formed. As a modification, it is also possible to: after the pipe body is formed, a plurality of gaps which are arranged in parallel at equal intervals are arranged in the pipe wall of the pipe body, and the pipe body part between every two adjacent gaps is used as a grid bar; the bars and the gaps form a filter. Wherein the gap is formed using a drilling process.
In the present embodiment, in the process of forming the housing 4 and the tube body 30, a melting region is formed in both the housing 4 and the tube body 30. As a modification, it is also possible to: and forming a melting area in an area where the shell surrounds the opening or an area where the tube body surrounds the filter, then welding and pressing the shell and the tube body through the melting area, and finally cooling.
The muffler 2 of the technical scheme has good noise reduction and elimination effect, can be conveniently applied and assembled in the existing adaptive vehicle type, and is not required to be limited in a production workshop. Referring to fig. 1 to 3, the muffler 2 is connected to the supercharger 1 through a pipe body 30 of the breather pipe 3, and the pipe body 30 is connected to the supercharger 1 through a quick connector 9. The quick connector is the most convenient plug-and-play connection mode at present, and particularly can embody the superiority of the quick connector on the occasions of difficult space where the air pipes are very inconvenient to connect.
Wherein, a mode of quick connector is: inserting the first hollow joint into an air outlet of the supercharger in an interference fit manner to realize fixed assembly; and sleeving the second hollow joint outside the pipe body of the vent pipe, operating the first hollow joint to stretch into the second hollow joint, and buckling and pressing the second hollow joint to fixedly and tightly connect the first hollow joint and the second hollow joint. Another way of a quick connector is: the first hollow joint and the second hollow joint are screwed together in a thread fit manner. Therefore, the type of the quick-connection plug can be reasonably selected according to the requirement.
As a modification, it is also possible to: in the production and manufacturing stage, the outlet pipe of the supercharger is designed to have longer length, the longer outlet pipe can be used as a vent pipe of the muffler, and the muffler and the outlet pipe of the supercharger can be integrally formed at the moment.
Further, referring to fig. 1 and 2, the connection method of the pipe body 30 of the breather pipe 3 and the rubber pipe 7 is a clip connection method. Specifically, the operation tube body 30 extends into the rubber tube 7; then, the clamp 70 is fastened to the outer ring of the region where the rubber tube 7 surrounds the tube body 30, and then the clamp 70 is fastened in the circumferential direction by using the bolt 71.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. The utility model provides a silencer for locating car booster gas outlet, the booster during operation produces there is high frequency noise to propagate to the gas outlet, its characterized in that, the silencer includes:
a vent tube connected to the air outlet, having a tube body and a tube cavity located within the tube body;
the shell is arranged outside the pipe body and is hermetically connected with the pipe body, and a silencing cavity is arranged in the shell;
the filter that communicates anechoic chamber and lumen, the filter is used for: and filtering the high-frequency noise transmitted in the pipe cavity to be dissipated in the anechoic cavity.
2. The muffler of claim 1, wherein the filter member comprises: the grid bars are arranged in parallel at equal intervals, and gaps are formed between every two adjacent grid bars;
setting the distance between two adjacent grid bars according to the acoustic wave wavelength range of the high-frequency noise, so that the high-frequency noise can pass through the gap between the two adjacent grid bars and enter the muffling cavity;
and setting the width of each grid bar according to the half-wavelength range of the high-frequency noise sound wave to enable the high-frequency noise sound wave entering the silencing cavity to be subjected to interference cancellation, wherein the width is the size of the grid bars along the arrangement direction of all the grid bars.
3. The muffler of claim 2, wherein formed in the tubular body between the muffling chamber and the lumen are: the arc-shaped strip seams are arranged at equal intervals along the axial direction of the pipe body, and the arc-shaped strips are positioned between every two adjacent arc-shaped strip seams;
the arc-shaped strip seam is used as the gap, and the arc-shaped strip is used as the grid strip.
4. The muffler of claim 2, wherein formed in the tubular body between the muffling chamber and the lumen are: the straight strip-shaped seams are arranged at equal intervals along the circumferential direction of the pipe body, and the straight strips are positioned between every two adjacent straight strip-shaped seams;
the straight strip type seam is used as the gap, and the straight strip is used as the grid strip.
5. The muffler of claim 1, wherein the filter member comprises: the plurality of round holes are arranged in the tube body and are communicated with the silencing cavity and the tube cavity;
setting the aperture of each round hole according to the acoustic wave wavelength range of the high-frequency noise, so that the high-frequency noise can pass through the round holes to enter the silencing cavity;
and setting the hole distance between two adjacent circular holes according to the half-wavelength range of the high-frequency noise sound wave, so that the interference of the high-frequency noise sound wave entering the silencing cavity is cancelled.
6. The muffler of claim 5, wherein all of the round holes are arranged in the following manner: the pipe body is arranged in a crossed manner along the axial direction of the pipe body and the circumferential direction of the pipe body.
7. The muffler of claim 1, including at least two shells spaced from one another, each of said shells defining one of said muffling chambers; or at least two silencing cavities separated from each other are formed in the shell;
each muffling cavity is correspondingly provided with one filtering piece, and every two filtering pieces are respectively used for filtering the high-frequency noise with different sound wave frequency ranges.
8. The muffler of claim 7, wherein at least two of said muffling chambers are formed in said housing in spaced relation to one another;
the casing is a closed annular structure surrounding the central axis of the pipe body, and all the muffling cavities are separated from each other along the circumferential direction of the pipe body.
9. The muffler of claim 1, wherein the pipe body and the housing are made of a high temperature resistant material capable of resisting the temperature of the gas circulating in the supercharger.
10. The muffler of claim 9, wherein the high temperature resistant material is nylon.
11. The muffler of claim 9, wherein the housing is coupled to the pipe body by: and (7) welding and connecting.
12. An automobile engine comprising a supercharger having an air outlet, characterized by further comprising: the muffler of any one of claims 1 to 11 connected to the outlet port by the vent pipe.
13. The automobile engine as set forth in claim 12, characterized in that the outlet of the supercharger is connected with an outlet pipe, and the vent pipe is connected with the outlet pipe through a quick connector; or,
the vent pipe is connected to the air outlet as an air outlet pipe.
14. A vehicle comprising the vehicle engine of claim 12 or 13.
15. A method for forming a muffler for an outlet port of a supercharger of an automobile, comprising:
forming a breather pipe, wherein the breather pipe is provided with a pipe body and a pipe cavity positioned in the pipe body, a filtering part is formed in the pipe body, the filtering part comprises a plurality of gaps which are arranged at equal intervals and grid bars positioned between every two adjacent gaps, and the gaps penetrate through the pipe body along the radial direction of the pipe body;
forming a shell, wherein a silencing cavity and an opening communicated with the silencing cavity are formed in the shell;
operating the opening of the housing to align with and surround the filter outside the tube;
after alignment, the housing is manipulated into sealing engagement with the tubular body.
16. The method of forming a muffler of claim 15, wherein prior to aligning the opening of the housing with the filter, a region of the housing surrounding the opening and/or a region of the pipe body surrounding the filter is melt-processed to form a melt region;
the method for operating the shell to be hermetically connected with the pipe body comprises the following steps:
operating the shell and the pipe body to be welded and pressed through the melting area;
and after the pressing, cooling treatment is carried out, and the shell is welded with the pipe body.
17. The method of forming a muffler of claim 15, wherein the method of forming the filter includes:
a plurality of gaps which are arranged in parallel at equal intervals are formed in the pipe wall of the pipe body, and the pipe body part between every two adjacent gaps is used as the grid bar;
the grid bars and the gaps form the filtering piece.
18. The method of forming a muffler according to claim 17, wherein said gaps are arcuate slits formed around a central axis of said pipe body, all of said arcuate slits are arranged at equal intervals in an axial direction of said pipe body, and said grill is an arcuate bar between two adjacent arcuate slits.
19. The method of forming a muffler according to claim 17, wherein the gap is straight slits parallel to the central axis of the pipe body, all of the straight slits are arranged at equal intervals in the circumferential direction of the pipe body, and the grill is a straight bar between two adjacent straight slits.
20. The method of forming a muffler of claim 15, wherein the method of forming the vent tube is an injection molding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510505094.2A CN106468211A (en) | 2015-08-18 | 2015-08-18 | Automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510505094.2A CN106468211A (en) | 2015-08-18 | 2015-08-18 | Automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method |
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| CN106468211A true CN106468211A (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510505094.2A Pending CN106468211A (en) | 2015-08-18 | 2015-08-18 | Automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method |
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