CN216741785U - Novel air inlet guide pipe of turbocharged engine - Google Patents
Novel air inlet guide pipe of turbocharged engine Download PDFInfo
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- CN216741785U CN216741785U CN202123133230.XU CN202123133230U CN216741785U CN 216741785 U CN216741785 U CN 216741785U CN 202123133230 U CN202123133230 U CN 202123133230U CN 216741785 U CN216741785 U CN 216741785U
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Abstract
The utility model discloses a novel turbocharged engine air inlet duct, which comprises an air inlet pipe, wherein the front end of the air inlet pipe is provided with an air inlet with a side opening, the rear end of the air inlet pipe is provided with a bent arc section connected to an air filter, and the pipe wall of the air inlet pipe between the air inlet and the bent arc section is uniformly provided with holes; the annular shell is annularly fixed on the outer wall of the air inlet pipe along the circumferential direction and used for sealing the opening, the middle part of the annular shell is outwards protruded, and an annular cavity communicated with the opening is formed at the inner side of the annular shell; the annular sound absorption pad is matched and filled in an annular cavity on the inner side of the annular shell; waterproof outer edge, enclose the mouth edge periphery of locating the air inlet. The utility model has the advantages that the advantages of small flow resistance, high frequency elimination and compact structure of the resistive muffler are combined with the environment that the air inlet system has no high temperature and no water inlet, thereby effectively reducing the high-frequency noise of the air inlet system, improving the comfort of personnel in the vehicle and the commodity of the whole vehicle, and meeting the regulatory requirement of the passing noise of the whole vehicle; the whole air inlet guide pipe has simple structure, light weight and low manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of the automobile engine technique of admitting air and specifically relates to a novel turbocharged engine air inlet duct that can effectively fall makes an uproar is related to.
Background
The existing automobile adopting the turbocharged engine has the defects that the oil consumption is reduced, and simultaneously, the high-frequency noise is generated when the turbine runs at a high speed. The high-frequency noise of the turbine is radiated to the periphery through the airflow of the air inlet system, and the noise can bring great negative influence to the commodity of the whole vehicle, so that a driver and passengers cannot tolerate the noise, and meanwhile, the regulatory requirement of the passing noise of the whole vehicle can not be met.
Disclosure of Invention
An object of the utility model is to provide a novel turbocharged engine inlet duct that can effectively fall makes an uproar.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
novel turbocharged engine inlet pipe, include:
the front end of the air inlet pipe is provided with an air inlet with a lateral opening, the rear end of the air inlet pipe is provided with a bent arc section connected to the air filter, and holes are uniformly distributed on the pipe wall of the air inlet pipe between the air inlet and the bent arc section;
the annular shell is annularly fixed on the outer wall of the air inlet pipe along the circumferential direction and used for sealing the opening, the middle part of the annular shell protrudes outwards, and an annular cavity communicated with the opening is formed on the inner side of the annular shell;
the annular sound absorption pad is adapted to be filled in an annular cavity on the inner side of the annular shell and used for absorbing and eliminating noise transmitted from the opening; and
the waterproof outer edge is arranged around the periphery of the opening edge of the air inlet and used for preventing external dripping from flowing into the air inlet.
Furthermore, the opening is a long round hole with the length of 30mm and the width of 5mm, the length direction of the opening is consistent with the length direction of the air inlet pipe, and multiple rows are uniformly distributed at intervals along the circumferential direction of the pipe wall of the air inlet pipe.
Furthermore, the annular shell is a PE shell, a PVC shell, a PU shell or a metal shell, and the thickness of the annular shell is 1 mm.
Furthermore, the annular sound absorption pad is a sound absorption cotton layer which is filled in the annular shell and is tightly attached to the outer wall of the air inlet pipe, and the sound absorption cotton layer has the density of 450 g/m2The single-component sound-absorbing cotton, the glass fiber cotton or the aluminum silicate rock wool.
Furthermore, the central axial direction of the air inlet and the axial included angle of the air inlet pipe are 90 degrees.
The utility model has the advantages of through the slotted hole of equipartition bar structure in turbo supercharged engine's intake pipe, and the position outside cladding that has the slotted hole is by inhaling the sound absorbing part that sound cotton layer and annular shell constitute, thereby constitute the hindering nature silencer in the intake pipe, absorb the noise of effluvium in the slotted hole, it is little to hinder the silencer flow resistance, high frequency, compact structure's advantage and air intake system do not have the high temperature, the environment of no intaking combines together, effectively reduce the high frequency noise of air intake system, improve personnel's travelling comfort in the car and the commodity of whole car, satisfy the regulation requirement of whole car passing through nature noise; in addition, the whole air inlet guide pipe has simple structure, light weight and low manufacturing cost, the cost of parts is only ten yuan, the price is very low, the noise reduction effect is very prominent, and the air inlet guide pipe is beneficial to wide popularization and application.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of the cut-away portion of fig. 1.
Fig. 3 is a diagram showing the results of transmission loss simulation analysis.
FIG. 4 is a schematic diagram showing the structure of a comparative test of the sound-deadening ability with and without the sound-absorbing cotton layer.
Fig. 5 is a schematic diagram of the transmission loss full-band test fitting result (20-6400 Hz) of the intake system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in figures 1 and 2, the novel air inlet duct of the turbocharged engine comprises an air inlet pipe 1, an annular shell 2, an annular sound absorption pad 3 and a waterproof outer edge 4.
Specifically, the front end (the inlet end) of intake pipe 1 is air inlet 5 that the side direction was seted up, and its rear end (the end of giving vent to anger) is the curved arc section 6 of connecting on air cleaner, in order to prevent as far as the water droplet from splashing to the inlet as possible, need to guarantee that the central axis of air inlet 5 is 90 with the axial contained angle of intake pipe 1. In addition, the pipe wall of the air inlet pipe 1 between the air inlet 5 and the arc bending section 6 is uniformly provided with the open holes 7 for transmitting noise, the open holes 7 are long round holes with the length of 30mm and the width of 5mm, the length direction of the open holes 7 is consistent with that of the air inlet pipe 1, and a plurality of rows of the open holes are uniformly distributed at intervals along the circumferential direction of the pipe wall of the air inlet pipe 1.
The thickness of annular shell 2 is 1mm, can adopt the shell of PE material, the shell of PVC material, the shell of PU material or the shell of metal material, and annular shell 2 encircles admittedly on 1 outer wall of intake pipe along circumference for closing cap trompil 7, and the middle part of annular shell 2 is outside protruding, and its inboard forms an annular chamber that is linked together with trompil 7.
The annular sound absorption pad 3 is adapted to be filled in an annular cavity on the inner side of the annular shell 2 and is used for absorbing and eliminating noise transmitted from the opening 7, and the annular sound absorption pad, the annular shell 2 and the opening 7 form a sound elimination part arranged on the air inlet pipe 1; specifically, the annular sound absorbing pad 3 is a sound absorbing cotton layer filled in the annular shell 2 and tightly attached to the outer wall of the air inlet pipe 1, and the sound absorbing cotton layer has a density of 450 g/m2The single-component sound-absorbing cotton, the glass fiber cotton or the aluminum silicate rock wool.
Waterproof outer edge 4 is in order to prevent outside dripping inflow air inlet 5, and is concrete, waterproof outer edge 4 sets up according to the shape of the 1 inlet end of intake pipe, guarantee that it encloses the mouth of locating air inlet 5 along the periphery can, waterproof outer width 2mm along 4 to form one barricade along the periphery at the mouth of air inlet 5, effective separation water droplet is in 1 outer wall inflow air inlet 5 of intake pipe, guarantees the inside drying of intake pipe 1.
Before a real object sample is manufactured, the noise elimination performance of the air inlet guide pipe needs to be digitally simulated in a digital model stage. During the simulation, the contrast state simplification of noise cancelling performance is for there being the cotton layer of sound absorption (having noise cancelling structure's intake pipe 1 promptly) and not having the cotton layer of sound absorption (having noise cancelling structure's intake pipe 1 promptly), through the contrast to the transmission loss simulation result of these two kinds of models, confirms the utility model discloses a noise cancelling effect.
Specifically, the Sysnoise solver built in LMS.virtual.Lab software is used, and the acoustic calculation precision is high, so that the software is generally adopted in the industry to develop the acoustic performance of the intake system. The method comprises the steps of calculating the transmission loss of the air inlet duct by adopting an acoustics module, namely a finite element acoustics module, of the software, carrying out gridding processing on a sound transmission area in the air inlet duct through finite element preprocessing software, converting a three-dimensional model of the sound transmission area in the air inlet duct into a grid model consisting of a limited number of units by adopting tetrahedron units with proper sizes, and establishing a finite element grid model of the air inlet duct through the method.
Lab software, arranging a virtual sweep frequency sound source at an air inlet, continuously generating sweep frequency sound excitation with constant amplitude and phase, setting the sweep frequency range to be 0-4500Hz, setting the sweep frequency step length to be 10Hz, setting an echo-free reflection condition at an outlet of an air inlet conduit, completely absorbing simulated sound at the outlet of the air inlet conduit, avoiding transmission loss calculation error caused by sound reflection at the outlet, arranging virtual microphones respectively near the virtual sweep frequency sound source, namely at the outlet of the air inlet conduit, acquiring sound pressure data of the inlet and the outlet of the air inlet conduit, and acquiring the sound pressure data of the inlet and the outlet to obtain the transmission loss in the 2000-4500Hz frequency range of the air inlet pipe under two states to serve as comparative evaluation data of the performance of the silencer. The calculation results are shown in FIG. 3.
As can be seen from FIG. 3, the transmission loss of the sound-absorbing cotton, namely the silencer, in each frequency band is 2-10dB compared with that of the sound-absorbing cotton without the sound-absorbing cotton.
And then, making a physical sample, and carrying out a comparative test on the transmission loss of the two states of the sound absorption cotton and the sound absorption cotton. Respectively exciting by using a low-frequency volume sound source and a high-frequency volume sound source; the low-frequency bandwidth is 20-800Hz, and the number of spectral lines is 2048; high frequency bandwidth 200-; further, the transfer function FRF of the air inlet noise and the air outlet is obtained; solving the transmission loss; the test results are shown in FIG. 4.
As can be seen from FIG. 4, the noise elimination capability of the air inlet pipe with the sound-absorbing cotton layer is obviously superior to that of the air inlet pipe without the sound-absorbing cotton layer in the whole high frequency band (1000 Hz-6000 Hz). The noise elimination capability is different by 2-10dB at the frequency of 2000 Hz. It can be seen that the test results are the same as the simulation results.
Through simulation analysis and experiment, homoenergetic proves that novel turbocharged engine inlet duct effective to high frequency noise, its transmission loss full frequency channel test fitting result (20-6400 Hz) is seen in figure 5.
As can be seen from figure 5, the novel air inlet duct of the turbocharged engine has reasonable design, meets the requirements on performance, and has simple structure and lower cost.
Claims (5)
1. A novel turbocharged engine air intake duct characterized in that: comprises that
The front end of the air inlet pipe is provided with an air inlet with a lateral opening, the rear end of the air inlet pipe is provided with a bent arc section connected to the air filter, and holes are uniformly distributed on the pipe wall of the air inlet pipe between the air inlet and the bent arc section;
the annular shell is annularly fixed on the outer wall of the air inlet pipe along the circumferential direction and used for sealing the opening, the middle part of the annular shell protrudes outwards, and an annular cavity communicated with the opening is formed on the inner side of the annular shell;
the annular sound absorption pad is adapted to be filled in an annular cavity on the inner side of the annular shell and used for absorbing and eliminating noise transmitted from the opening; and
the waterproof outer edge is arranged around the periphery of the opening edge of the air inlet and used for preventing external dripping from flowing into the air inlet.
2. The new turbocharged engine intake duct of claim 1, wherein: the opening is a long round hole with the length of 30mm and the width of 5mm, the length direction of the opening is consistent with that of the air inlet pipe, and multiple rows are uniformly distributed at intervals along the circumferential direction of the pipe wall of the air inlet pipe.
3. The new turbocharged engine intake duct of claim 1, wherein: the annular shell is a PE shell, a PVC shell, a PU shell or a metal shell, and the thickness of the annular shell is 1 mm.
4. The new turbocharged engine intake duct of claim 1, wherein: the annular sound absorption pad is a sound absorption cotton layer which is filled in the annular shell and is tightly attached to the outer wall of the air inlet pipe, and the sound absorption cotton layer is 450 g/m in density2The single-component sound-absorbing cotton, the glass fiber cotton or the aluminum silicate rock wool.
5. The new turbocharged engine intake duct of claim 1, wherein: the central axial direction of the air inlet and the axial included angle of the air inlet pipe are 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123133230.XU CN216741785U (en) | 2021-12-14 | 2021-12-14 | Novel air inlet guide pipe of turbocharged engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123133230.XU CN216741785U (en) | 2021-12-14 | 2021-12-14 | Novel air inlet guide pipe of turbocharged engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216741785U true CN216741785U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123133230.XU Active CN216741785U (en) | 2021-12-14 | 2021-12-14 | Novel air inlet guide pipe of turbocharged engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216741785U (en) |
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2021
- 2021-12-14 CN CN202123133230.XU patent/CN216741785U/en active Active
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