CN216044116U - Broadband muffler of trompil formula and have air inlet hose of this broadband muffler - Google Patents

Abstract

The utility model provides an open-hole type broadband silencer which can effectively reduce air leakage noise. This wide band muffler includes by last casing and the cylindric casing that the casing lock formed down, and the lock is in core in the cylindric casing, the pipe wall periphery of core with be equipped with baffle structure between the inner wall of cylindric casing, baffle structure with the pipe wall periphery of core with muffler chamber and back muffler chamber before spatial separation between the inner wall of cylindric casing, the core corresponds the pipe wall in preceding muffler chamber is equipped with the preceding frequency modulation through-hole of a plurality of groups along circumference, and the through-hole quantity differentiation of adjacent two sets of preceding frequency modulation through-hole sets up, the core corresponds the pipe wall in back muffler chamber is equipped with a plurality of groups back frequency modulation through-hole along circumference, and the through-hole quantity differentiation of adjacent two sets of back frequency modulation through-holes sets up.

Description

Broadband muffler of trompil formula and have air inlet hose of this broadband muffler

Technical Field

The utility model relates to the technical field of automobile engine spare and accessory parts, in particular to a hole-opening type broadband silencer and an air inlet hose with the same.

Background

With the rapid development of the automobile industry in China, people pay more attention to the dynamic property and the comfort of passengers of automobiles, and vehicle noise is an important factor influencing the driving experience of consumers and is also the focus of attention of all whole automobile factories. Among the many types of automobile noise, engine intake system noise is closest to the cabin and contributes significantly to the noise in the vehicle. Therefore, when designing the air intake system, not only the structural rigidity and the flow field characteristics in the pipe are considered, but also the acoustic performance is evaluated.

At present, a widely-adopted turbocharged engine boosts intake air by means of driving a turbine to rotate a compressor by means of exhaust gas, and when the engine accelerates, the rotating speeds of the turbine and the compressor are correspondingly increased, so that the boosting degree is increased. When the throttle is suddenly closed, the throttle valve is closed, but the supercharger does not stop working. Because of inertia, the turbine still keeps rotating at a high speed of more than tens of thousands of revolutions per minute, air is still continuously compressed into the intermediate cooling pipe, if the high-pressure air in the intermediate cooling pipe cannot be discharged in time, the pressure in the intermediate cooling pipe is rapidly increased, and the throttle valve can be damaged or the intermediate cooling pipe can be cracked. In addition, if the pressure at the high pressure end is not released in time, it can cause turbo lag during reacceleration, leading to supercharger surge, and thus affecting engine performance.

In order to release high-pressure gas in time, a pressure relief device needs to be additionally arranged in the middle cooling pipeline to relieve the high-pressure gas to a low-pressure end. The pressure relief valve is essentially a valve arranged between the high-pressure end and the low-pressure end of the intercooling pipeline, the opening and closing of the pressure relief valve are controlled by an electromagnetic coil controlled by an ECU (electronic control unit), the ECU can make effective judgment according to the outlet pressure and the inlet pressure of the turbine, and once the pressure exceeds a critical value, the electromagnetic coil is electrified or deenergized to control the opening and closing of the electromagnetic valve.

One end of the electromagnetic valve is high-pressure gas, and the other end of the electromagnetic valve is a low-pressure end, when the electromagnetic valve is opened, the high-pressure gas quickly passes through the valve, and very high air leakage sound can be generated.

The air leakage sound is mainly transmitted out through the air inlet of the air inlet system, the air inlet system has certain silencing capacity, meanwhile, standing wave silencing exists in the pipeline, the air leakage sound characteristic of the air inlet is different in amplitude on different frequencies, the silencing unit for eliminating Hiss noise in the air inlet system also has the effect on the air leakage sound, but the air leakage sound has the characteristic of short-time high amplitude, so that the requirement on the sound leakage quantity is higher, and in the case, an additional silencing unit is needed.

Disclosure of Invention

The utility model aims to provide an open-cell broadband silencer which can effectively reduce air leakage noise.

The open-cell broadband silencer comprises a cylindrical shell formed by buckling an upper shell and a lower shell, and a core body buckled in the cylindrical shell, wherein a partition plate structure is arranged between the periphery of the tube wall of the core body and the inner wall of the cylindrical shell, the partition plate structure divides the space between the periphery of the tube wall of the core body and the inner wall of the cylindrical shell into a front silencing cavity and a rear silencing cavity, a plurality of groups of front frequency modulation through holes are circumferentially arranged on the tube wall of the core body corresponding to the front silencing cavity, the number of the through holes of two adjacent groups of front frequency modulation through holes is arranged in a differentiated mode, a plurality of groups of rear frequency modulation through holes are circumferentially arranged on the tube wall of the core body corresponding to the rear silencing cavity, and the number of the through holes of two adjacent groups of rear frequency modulation through holes is arranged in a differentiated mode.

The cylindrical shell is divided into a front silencing chamber and a rear silencing chamber by the partition plate structure, a plurality of groups of frequency modulation through holes are distributed in the circumferential direction of each silencing chamber at intervals, and the number of the through holes of the two adjacent groups of frequency modulation through holes is different, so that enough transmission loss is caused to noise in the silencing frequency requirement of the air leakage noise of the engine supercharging air inlet system, and the silencing quantity of the broadband silencer in a target frequency band meets the requirement.

Furthermore, the apertures of the front frequency modulation through hole and the rear frequency modulation through hole are the same, and the uniform aperture is beneficial to CAE simulation analysis.

Further, in order to fully utilize the pipe wall area of the core body to achieve a better noise reduction effect, the front frequency modulation through holes comprise four groups of through holes with the number of N1, N2, N1 and N2 in sequence, and the rear frequency modulation through holes comprise four groups of through holes with the number of N3, N4, N3 and N4 in sequence.

The second purpose of the utility model is to provide an air inlet hose with the wide-band silencer, the air inlet hose comprises the open-pore wide-band silencer, a front-section rubber pipe used for connecting an engine supercharger and a rear-section rubber pipe used for connecting an air filter, and two ends of the open-pore wide-band silencer are respectively inserted into the front-section rubber pipe and the rear-section rubber pipe and are fastened through a worm clamp.

According to the air inlet hose, the front-section rubber pipe and the rear-section rubber pipe for the broadband silencer are respectively connected with the engine supercharger and the air filter, so that the noise radiated by high-frequency HISS sound through the air inlet pipeline can be reduced.

Furthermore, a two-way pipe joint used for connecting a pressure relief valve connecting pipe is arranged on the front section rubber pipe, so that the pressure-relieved high-pressure gas is released in time.

Further, the upper shell and the lower shell of the broadband silencer are preferably fixed through vibration friction welding, and the two-way pipe joint is preferably fixed on the front section rubber pipe through a vulcanization process.

Drawings

FIG. 1 is a schematic diagram of the structure of the open-cell broadband muffler of the present invention.

Fig. 2 is a schematic view of the structure of the intake hose of the present invention.

In which the figures are as follows: 1. a cylindrical housing; 1a, an upper shell; 1b, a lower shell; 11. a front muffling cavity; 12. a rear muffling chamber; 2. a core body; 20. a partition plate; 21. a front frequency modulation through hole; 22. a rear frequency modulation through hole; 3. a separator structure; 4. a front section rubber tube; 5. a rear section rubber tube; 6. a worm hoop; 7. two-way pipe joint.

Detailed Description

The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.

Referring to fig. 1, the open-cell broadband muffler of the present invention includes a cylindrical housing 1 formed by an upper housing 1a and a lower housing 1b, and a core 2 fastened in the cylindrical housing 1, wherein a partition structure 3 is provided between the outer periphery of the tube wall of the core 2 and the inner wall of the cylindrical housing 1, the partition structure 3 partitions the space between the outer periphery of the tube wall of the core 2 and the inner wall of the cylindrical housing 1 into a front muffling cavity 11 and a rear muffling cavity 12, a plurality of groups of front fm through holes 21 are provided on the tube wall of the core 2 corresponding to the front muffling cavity 11 along the circumferential direction, the number of through holes of two adjacent groups of front fm through holes is set differently, a plurality of groups of rear fm through holes 22 are provided on the tube wall of the core 2 corresponding to the rear muffling cavity 12 along the circumferential direction, and the number of through holes of two adjacent groups of rear fm through holes is set differently. The number and the aperture of the through holes of the front frequency modulation through hole 21 and the rear frequency modulation through hole 22 can be designed through CAE simulation analysis, and the requirement of the silencer on the requirement of meeting the silencing quantity in a target frequency band is taken as a standard; the partition structure 3 may be a structure in which the partition 20 provided on the tube wall of the core 2 and the clamping groove provided on the inner wall of the cylindrical housing 1 are clamped together as in this embodiment, so as to ensure the sound insulation performance, or may be a structure in which the partition is provided on the inner wall of the cylindrical housing 1 and the clamping groove is formed on the outer periphery of the tube wall of the core 2.

The cylindrical shell is divided into two silencing chambers, namely a front silencing chamber 11 and a rear silencing chamber 12, by the partition plate structure 3, a plurality of groups of frequency modulation through holes are distributed in the circumferential direction of each silencing chamber in a clearance mode, and the number of the through holes of two adjacent groups of frequency modulation through holes is different, so that enough transmission loss is caused to noise in the silencing frequency requirement of the air leakage noise of the engine supercharging air inlet system, and the silencing quantity of the broadband silencer in a target frequency band meets the requirement.

In a preferred embodiment, the front and rear tuning through holes 21 and 22 have the same diameter, and the uniform diameter is beneficial to CAE simulation analysis.

Preferably, in order to fully utilize the wall area of the core 2 to achieve a better sound attenuation effect, the front tuning through holes 21 include four groups of through holes with the number of N1, N2, N1 and N2 in sequence, and the rear tuning through holes 22 include four groups of through holes with the number of N3, N4, N3 and N4 in sequence.

The utility model also provides an air inlet hose with the broadband silencer, which comprises the open-pore broadband silencer, a front-section rubber pipe 4 used for connecting an engine supercharger and a rear-section rubber pipe 5 used for connecting an air filter, wherein two ends of the open-pore broadband silencer are respectively inserted into the front-section rubber pipe 4 and the rear-section rubber pipe 5 and are fastened through a worm clamp 6.

According to the air inlet hose, the front-section rubber pipe 4 and the rear-section rubber pipe 5 for the broadband silencer are respectively connected with the engine supercharger and the air filter, so that the noise radiated by high-frequency HISS sound through the air inlet pipeline is favorably reduced.

In a preferred embodiment, the front rubber tube 4 is provided with a two-way joint 7 for connecting a connecting tube of the pressure relief valve, so that the high-pressure gas released by pressure relief can be released in time.

Preferably, the upper shell 1a and the lower shell 1b of the broadband silencer are fixed by vibration friction welding, and the two-way pipe joint 7 is fixed on the front-section rubber pipe 4 by a vulcanization process.

The utility model has been described in connection with the accompanying drawings, it is to be understood that the utility model is not limited in its application to the details of construction and the arrangement of the components set forth in the following description, as long as the utility model is capable of being practiced without modification in any way whatsoever, and is capable of other applications without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (6)

1. The utility model provides a wide band muffler of trompil formula, its characterized in that includes the cylindric casing that is formed by last casing and lower casing lock, and the lock is in core in the cylindric casing, the pipe wall periphery of core with be equipped with baffle structure between the inner wall of cylindric casing, baffle structure with the pipe wall periphery of core with preceding amortization chamber and back amortization chamber are separated to space between the inner wall of cylindric casing, the core corresponds the pipe wall in preceding amortization chamber is equipped with the preceding frequency modulation through-hole of a plurality of groups along circumference, and the through-hole quantity differentiation of adjacent two sets of preceding frequency modulation through-holes sets up, the core corresponds the pipe wall in back amortization chamber is equipped with the back frequency modulation through-hole of a plurality of groups along circumference, and the through-hole quantity differentiation of adjacent two sets of back frequency modulation through-holes sets up.

2. The open-cell broadband muffler of claim 1, wherein the front and rear FM through-holes have the same diameter.

3. The open-cell broadband muffler of claim 2, wherein the front tuning vias comprise four sets of vias in the order of N1, N2, N1, N2, and the rear tuning vias comprise four sets of vias in the order of N3, N4, N3, N4.

4. An air intake hose, comprising the open-cell broadband silencer according to claim 1, 2 or 3, further comprising a front rubber tube for connecting to an engine supercharger and a rear rubber tube for connecting to an air cleaner, wherein both ends of the open-cell broadband silencer are inserted into the front rubber tube and the rear rubber tube respectively and fastened by a worm clamp.

5. The air intake hose of claim 4, wherein the front rubber tube is provided with a two-way pipe joint for connecting a connecting pipe of the pressure relief valve.

6. The intake hose of claim 5, wherein the upper and lower housings of the broadband silencer are fixed by vibration friction welding, and the two-way pipe joint is fixed to the front rubber pipe by a vulcanization process.

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