CN214705422U

CN214705422U - Composite silencer of fuel cell engine

Info

Publication number: CN214705422U
Application number: CN202120600761.6U
Authority: CN
Inventors: 郝红岩; 董永; 王克景
Original assignee: Langfang Qirui Battery Technology Co ltd
Current assignee: Shengshi Yingchuang hydrogen energy technology (Shaanxi) Co.,Ltd.
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-11-12
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses a compound muffler of fuel cell engine, including hollow structure's noise damping post and the casing of wrapping up outside the noise damping post lateral wall, be equipped with the noise damping hole on the noise damping post lateral wall, noise damping post both ends are equipped with air inlet and gas vent respectively, and the gas vent is connected with the honeycomb duct, forms the amortization cavity between casing and noise damping post, and the amortization cavity is through noise damping hole and noise damping post intercommunication, and ceramic micropore noise damping ball is equipped with to the interior packing of amortization cavity. The utility model makes full use of resistive silencing, resistive silencing and micropore scattering silencing, and the synergistic effect of multiple silencing modes, so that the silencer can effectively eliminate the noise of the fuel cell engine; the utility model has the advantages of compact and simple integral structure and strong practicability.

Description

Composite silencer of fuel cell engine

Technical Field

The invention belongs to the technical field of fuel cells, and particularly relates to a composite muffler of a fuel cell engine.

Background

Fuel cells are devices that convert chemical energy directly into electrical energy, and are widely used in stationary power generation, transportation, and portable power sources due to their advantages of high efficiency, low starting temperature, zero pollution, etc.

Early fuel cell systems had low operating pressures and low power, and thus had insignificant noise and had little attention paid to silencing. At the present stage, along with the continuous increase of the system power and the continuous improvement of the working pressure, the noise problem of the system is increasingly obvious, according to GB1495-2002 noise limitation and measurement method outside the accelerated automobile, when an M1 automobile runs in an accelerated manner, the maximum noise level outside the automobile does not exceed 74dB (A), corresponding to the passing noise of the whole automobile being less than 74dB (A) sound pressure level, and corresponding to the noise of 1M sound power of the engine being less than 100dB (A). The traditional internal combustion engine has relatively perfect noise reduction schemes after centuries of development, but the silencing work of the fuel cell is just started, so that the development of a high-efficiency fuel cell system silencer is necessary.

Currently, there are mainly 2 types of silencers in common use, namely resistive silencers and resistive silencers. The resistive silencer is suitable for silencing medium and high frequencies, and the resistive silencer is suitable for silencing medium and low frequencies. The noise of the fuel cell system has the characteristics of high sound level and wide frequency band, simple resistive silencing or resistant silencing cannot be met, and due to the high-temperature high-humidity characteristic of fuel cell exhaust, the common resistive sound-absorbing material cannot meet the use requirement easily, so that a silencer which can adapt to the high-temperature high-humidity environment and can effectively reduce noise pollution is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compound muffler of fuel cell engine aims at solving the problem that prior art exists among the background art.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a compound muffler of fuel cell engine, includes hollow structure's noise column and wraps up the casing outside the noise column lateral wall, is equipped with the noise elimination hole on the noise column lateral wall, and the noise column both ends are equipped with air inlet and gas vent respectively, and the gas vent is connected with the honeycomb duct, forms the amortization cavity between casing and noise column, and the amortization cavity passes through noise elimination hole and noise column intercommunication, and the amortization cavity intussuseption is equipped with ceramic micropore noise elimination ball.

Preferably, the housing is arranged along the length direction of the silencing column in a stepped manner, and the housing gradually reduces along the direction from the air inlet to the air outlet.

Preferably, the outer wall of each stage of the stepped shell is inclined towards the silencing column along the direction from the air inlet to the air outlet.

Preferably, a partition plate is arranged between each stage of the stepped shell in the silencing chamber to form a plurality of silencing chambers with different sizes, and a water outlet is formed in the side wall of each silencing chamber.

Preferably, the sizes of the ceramic microporous sound-absorbing balls filled in the sound-absorbing chambers with different sizes formed by dividing the partition board are different, the large-volume sound-absorbing chamber is filled with the large-volume ceramic microporous sound-absorbing balls, and the small-volume sound-absorbing chamber is filled with the small-volume ceramic microporous sound-absorbing balls.

Preferably, a drainage channel is formed between the partition plate and the inner wall of the shell, so that precipitated water can be effectively drained, and the silencing effect is further improved.

Preferably, a channel is arranged on the side wall of the silencing chamber, and a cover body is arranged on the inlet channel.

Preferably, the air inlet is provided with a Y-direction guide plate, the air outlet is provided with an X-direction guide plate, and the air flow is cut by the Y-direction guide plate and the X-direction guide plate.

Preferably, the muffling hole is circular, oval or rectangular.

Compare in prior art's shortcoming and not enough, the utility model discloses following beneficial effect has:

the utility model provides a pair of compound muffler of fuel cell engine, the influence of high temperature and high humidity to the noise cancelling effect can effectively be avoided to the ceramic micropore amortization ball of loading in the amortization cavity, in addition, the utility model discloses a casing adopts the stairstepping, forms the cavity of a plurality of variation in size, and the noise of different frequencies is absorbed in the more effectual elimination of the ceramic micropore amortization ball of each cavity cooperation corresponding dimension, and the moisture that appears has been avoided in the setting of drainage structures to the influence of noise cancelling effect, and the access way of amortization cavity lateral wall setting can be more convenient change ceramic micropore amortization ball to adapt to the demand scene of different frequency noise. The utility model discloses compact structure, simple, multiple amortization principle is used simultaneously, under the condition that the volume is equal the utility model discloses stronger amortization ability has.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a first embodiment of a composite muffler for a fuel cell engine according to the present invention.

Fig. 2 is a perspective view of a first embodiment of the composite muffler for a fuel cell engine according to the present invention.

Fig. 3 is a schematic cross-sectional structure diagram of a second embodiment of the composite muffler for a fuel cell engine according to the present invention.

Fig. 4 is a perspective view of a second embodiment of the composite muffler for a fuel cell engine according to the present invention.

In the figure: 1. a sound deadening column; 2. an air inlet; 3. an exhaust port; 4. a flow guide pipe; 5. a first sound-deadening chamber; 6. a second sound-deadening chamber; 7. a third sound-deadening chamber; 8. a fourth muffling chamber; 9. a Y-direction guide plate; 10. an X-direction guide plate; 11. a ceramic microporous sound-deadening ball; 12. a drainage channel; 13. a water outlet; 14. a silencing hole; 15. a housing; 16. a partition plate; 17. a channel; 18. a cover body.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

The utility model relates to a compound muffler of fuel engine, refer to figure 1, including hollow structure's noise damping post 1 and wrap up casing 15 outside the noise damping post lateral wall, be provided with noise damping hole 14 on the sound damping post 1, noise damping hole 14 can be circular, oval, rectangle etc. and the air current can get into the noise damping cavity through the 14 scattering shifting of noise damping hole after getting into noise damping post 1. The two ends of the sound-deadening column 1 are respectively provided with an air inlet 2 and an air outlet 3, the air inlet 2 is fixed with a Y-direction guide plate 9, the air outlet 3 is fixed with an X-direction guide plate 10, the projection of the Y-direction guide plate and the X-direction guide plate in the length direction of the sound-deadening column 1 has an included angle, the included angle is preferably 90 degrees, and the air outlet 3 is connected with a guide pipe 4; casing 15 is the stairstepping setting along 1 length direction of amortization post, and casing 15 dwindles gradually to 3 directions of gas vent along air inlet 2, specifically, sets up to amortization post 1 slope along the outer wall of every section of the trapezoidal casing of air inlet 2 on 3 directions of gas vent, forms the amortization cavity between casing 15 and the amortization post 1, and the amortization cavity passes through

amortization hole

14 and 1 intercommunication of amortization post.

Be equipped with baffle 16 between every section ladder-shaped casing in the amortization cavity, baffle 16 divides into a plurality of different amortization cavities of size along amortization post 1 length direction with the amortization cavity, refer to fig. 1-2, divide into first amortization cavity 5, second amortization cavity 6, third amortization cavity 7 and fourth amortization cavity 8 along amortization post 1 length direction with the amortization cavity. The ceramic micropore sound-absorbing ball 11 is filled in the sound-absorbing chamber, the volume of the first sound-absorbing chamber 5 is larger than the volume of the second sound-absorbing chamber 6, the volume of the second sound-absorbing chamber 6 is larger than the volume of the third sound-absorbing chamber 7, and the like, the ceramic micropore sound-absorbing balls 11 with different sizes can be filled according to the volumes, the ceramic micropore sound-absorbing ball 11 with large volume is filled in the sound-absorbing chamber with large volume, and the ceramic micropore sound-absorbing ball with small volume is filled in the sound-absorbing chamber with small volume. Thereby effectively eliminating the noise of different frequencies. The ceramic micropore silencing ball 11 has the characteristics of high temperature resistance and moisture resistance, and is matched with the multistage silencing chambers, so that the sound waves can reflect, interfere, shift frequency, absorb sound and the like at the same time, and the noise can be absorbed and eliminated more effectively.

A partition 16 provided in the sound-deadening chamber and the inner wall of the casing 15 are opened to form a water discharge passage 12, and a water discharge port 13 is provided at the lowest end of the first sound-deadening chamber 5, and the water discharge passage 12 and the water discharge port 13 are provided on the same line. The size of the drainage channel 12 is smaller than the diameter of the ceramic microporous sound-deadening ball 11 in the adjacent chamber, preventing the ceramic microporous sound-deadening ball 11 from passing through the partition 16. During the use, drainage channel 12 and outlet 13 are located the least significant end of muffler, because the moisture content is higher in the air current, the water that separates out in the amortization cavity passes drainage channel 12 because of self action of gravity, finally discharges by outlet 13 that is located first cavity to effectively avoid the influence that ponding caused the noise cancelling effect in the muffler, therefore make the muffler can effectively absorb the noise elimination under the high temperature and high humidity condition.

Example 2

Referring to fig. 3 and 4, embodiment 2 is different from embodiment 1 in that a channel 17 is formed on a side wall of the housing 15 corresponding to each sound-deadening chamber, a cover 18 is disposed on the channel 17, a thread is formed on an inner wall of the channel 17, and the cover 18 is a bolt having a thread engaged with the inner wall of the channel. Through the arrangement of the channel 17, the ceramic microporous sound-absorbing ball 11 can be selected or replaced according to different requirements and scenes or the loss degree of the ceramic microporous sound-absorbing ball 11.

The working principle is as follows: gas is cut to the guide plate 9 through the Y through the air inlet 2, and enters the interior of the silencing column 1, then the gas enters the silencing chambers through the silencing holes 14 in a scattering frequency shift mode, the silencing chambers with different sizes correspond to different frequencies, each silencing chamber is filled with ceramic micropore silencing balls 11, the silencing balls can be replaced according to different frequencies of an air compressor, the gas flow after silencing treatment is cut to the guide plate 10 through the X and penetrates through the exhaust port 3, the guide pipe 4 guides noise to be further attenuated, and finally the gas is discharged, and water separated out in the silencing chambers is discharged through the water outlet 13 under the action of gravity. The utility model discloses a synthesize compound muffler that utilizes hindering nature amortization, resistance amortization, micropore scattering amortization principle and design.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fuel cell engine composite muffler comprises a hollow sound-deadening column and a shell which is wrapped outside the side wall of the sound-deadening column, and is characterized in that the side wall of the sound-deadening column is provided with a sound-deadening hole, two ends of the sound-deadening column are respectively provided with an air inlet and an air outlet, and the air outlet is connected with a flow guide pipe; a silencing cavity is formed between the shell and the silencing column and is communicated with the silencing column through a silencing hole, and ceramic micro-pore silencing balls are filled in the silencing cavity.

2. The fuel cell engine composite muffler of claim 1, wherein the housing is stepped along a length direction of the muffler pillar, and the housing is tapered in a direction from the intake port to the exhaust port.

3. The fuel cell engine composite muffler of claim 2, wherein an outer wall of each stage of the stepped shell is disposed obliquely to the muffler pillar in a direction from the intake port to the exhaust port.

4. The fuel cell engine composite muffler of claim 3, wherein a partition is provided between each stage of the stepped housing in the muffling chamber to form a plurality of muffling chambers having different sizes, and a water discharge port is provided in a side wall of each muffling chamber.

5. The composite type muffler for a fuel cell engine according to claim 4, wherein the partition plate is divided into a plurality of different-sized muffling chambers, and the ceramic micro-porous muffling balls are filled in the large-sized muffling chambers and the small-sized muffling chambers, respectively, in different sizes.

6. The fuel cell engine composite muffler of claim 4, wherein a drain passage is formed by an opening between the partition plate and an inner wall of the case.

7. The fuel cell engine composite muffler of claim 5, wherein a passage is provided on a side wall of the muffling chamber, and a cover is provided on the passage.

8. The fuel cell engine composite muffler according to any one of claims 1 to 7, wherein a Y-guide plate is provided at the air inlet, and an X-guide plate is provided at the air outlet.

9. The fuel cell engine composite muffler according to claim 1, wherein the muffling hole is circular, elliptical or rectangular.