CN220121893U - Exhaust device of fuel cell engine - Google Patents
Exhaust device of fuel cell engine Download PDFInfo
- Publication number
- CN220121893U CN220121893U CN202320838475.2U CN202320838475U CN220121893U CN 220121893 U CN220121893 U CN 220121893U CN 202320838475 U CN202320838475 U CN 202320838475U CN 220121893 U CN220121893 U CN 220121893U
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- noise reduction
- exhaust pipe
- pipe body
- wall
- fuel cell
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- 239000000446 fuel Substances 0.000 title claims abstract description 19
- 229920000742 Cotton Polymers 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 239000011241 protective layer Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 230000002940 repellent Effects 0.000 claims 1
- 239000005871 repellent Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000003584 silencer Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses an exhaust device of a fuel cell engine, which comprises an exhaust pipe body for circulating engine tail gas, wherein a noise reduction assembly is arranged in the exhaust pipe body; the noise reduction assembly comprises a second noise reduction plate and a plurality of first noise reduction plates, and a second speed reduction cavity is formed in the second noise reduction plate; the inner wall and the outer wall of the second noise reduction plate and the first noise reduction plate are respectively provided with a plurality of second honeycomb grooves and first honeycomb grooves, and sound absorbing cotton is embedded in the first honeycomb grooves and the second honeycomb grooves. According to the utility model, the first noise reduction groove and the second noise reduction groove are formed in the outer wall and the inner wall of the first noise reduction plate and the second noise reduction plate, the sound absorption cotton is fixedly connected to the inner walls of the first noise reduction groove and the second noise reduction groove, noise impacted on the first noise reduction plate and the second noise reduction plate can be absorbed through the sound absorption cotton, noise impact on the noise reduction plate is avoided, echo is generated, meanwhile, the noise can be absorbed and eliminated, and the noise reduction effect is improved.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to an exhaust device of a fuel cell engine.
Background
In a hydrogen fuel cell engine, high-frequency noise with large noise and poor sound quality generated by a fuel cell air compressor is a main noise source, and the noise has obvious discrete peaks along with different operation conditions of the air compressor.
According to the patent application number of China: 202120385337.4; the utility model discloses an exhaust device and an exhaust system of a fuel cell engine, wherein the volumes of a plurality of deceleration cavities are reduced along the air flow direction in an exhaust pipe body, which is favorable for assisting a silencer in reducing noise of different frequencies of an air compressor, widens the noise elimination and noise reduction frequency band, improves the NVH quality of the whole vehicle and improves the satisfaction of customers.
This solution has the following drawbacks:
according to the scheme, the plurality of noise reduction plates are arranged in the exhaust pipe body, the plurality of speed reduction cavities are formed in the exhaust pipe body through the noise reduction plates, the volumes of the plurality of speed reduction cavities are reduced along the air flow direction in the exhaust pipe body, the noise of different frequencies of the air compressor is reduced by the aid of the auxiliary silencer, when the noise enters the inside of the speed reduction cavities along the air flow direction of the exhaust pipe body, part of the noise can strike the outer wall of the noise reduction plates, the noise is formed into an echo through the noise reduction plates, two sound waves with similar frequencies are overlapped, two sound waves with new frequencies can be generated, one sound wave is a 'difference frequency' sound wave (the frequencies of the two sound waves are subtracted), and the other sound wave is a 'average frequency' sound wave (sound wave with average frequency); the two sound waves with the same frequency are overlapped, and the frequency is unchanged; the frequency difference is large, the frequency is unchanged, and the original sound wave frequency is also obtained; further, noise is increased, and in view of the above, we propose an exhaust device of a fuel cell engine.
Disclosure of Invention
The present utility model is directed to an exhaust device of a fuel cell engine, which solves the above-mentioned problems of the related art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: an exhaust device of a fuel cell engine comprises an exhaust pipe body for circulating engine tail gas, wherein a noise reduction assembly is arranged in the exhaust pipe body, and a water collection tank is arranged at the bottom end of the exhaust pipe body; the exhaust pipe body consists of a plurality of corrugated pipes and two connecting pipes; the noise reduction assembly comprises a second noise reduction plate and a plurality of first noise reduction plates, wherein the second noise reduction plate and the plurality of first noise reduction plates are respectively provided with a flow hole, the second noise reduction plate and the first noise reduction plates are sequentially arranged at intervals along the air flow direction in the exhaust pipe body so as to divide the exhaust pipe body into a plurality of first speed reduction cavities, the volumes of the plurality of first speed reduction cavities are sequentially reduced along the air flow direction in the exhaust pipe body, and the second speed reduction cavities are formed in the second noise reduction plate; the inner walls and the outer walls of the second noise reduction plate and the first noise reduction plate are respectively provided with a plurality of second honeycomb grooves and first honeycomb grooves, and sound absorbing cotton is embedded in the first honeycomb grooves and the second honeycomb grooves.
Preferably, a plurality of the corrugated pipes are fixedly connected between adjacent ones, and two connecting pipes are respectively used for fixing two ends of the corrugated pipes.
Preferably, the distance between two adjacent first noise reduction plates is sequentially reduced along the air flow direction in the exhaust pipe body.
Preferably, the inner wall and the outer wall of the first noise reduction plate are both in conical barrel-shaped structures, and the small-diameter end and the large-diameter end of the barrel-shaped structures are sequentially distributed along the air flow direction in the exhaust pipe body.
Preferably, both sides of the inner wall and both sides of the outer wall of the second noise reduction plate are in conical barrel-shaped structures, and the interior of the second speed reduction cavity is changed from big to small.
Preferably, a drain hole is formed in the corrugated pipe, a water inlet hole is formed in the top end of the water collecting tank, and a drain pipe is arranged between the drain hole and the water inlet hole.
Preferably, the inner wall of the drain pipe is fixedly connected with a semi-circular pipe, and the bottom end of the semi-circular pipe is fixedly connected with a truncated cone.
Preferably, the inner wall of the exhaust pipe body is provided with a protective layer, and the protective layer is made of a material with hydrophobic performance and antirust performance.
The utility model has the technical effects and advantages that:
according to the utility model, the first noise reduction groove and the second noise reduction groove are formed in the outer wall and the inner wall of the first noise reduction plate and the second noise reduction plate, the sound absorption cotton is fixedly connected to the inner walls of the first noise reduction groove and the second noise reduction groove, noise impacted on the first noise reduction plate and the second noise reduction plate can be absorbed through the sound absorption cotton, noise impact on the noise reduction plate is avoided, echo is generated, meanwhile, the noise can be absorbed and eliminated, and the noise reduction effect is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a cross-sectional view of the overall internal structure of the present utility model.
Fig. 3 is an enlarged schematic view of the structure of fig. 2 a according to the present utility model.
FIG. 4 is a schematic view of the structure of the first noise reduction plate, the first honeycomb groove and the second honeycomb groove according to the present utility model.
Fig. 5 is a schematic view of the bellows structure of the present utility model.
In the figure: 1. a bellows; 101. a drain hole; 2. a connecting pipe; 3. a first noise reduction plate; 301. a first honeycomb groove; 302. a second cell; 303. a flow hole; 304. a second noise reduction plate; 4. a water collection tank; 401. a water inlet hole; 5. a drain pipe; 501. conical frustum; 502. semi-circular pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides an exhaust device of a fuel cell engine as shown in figures 1-5, which comprises an exhaust pipe body for circulating engine tail gas, wherein a noise reduction assembly is arranged in the exhaust pipe body, and a water collection tank 4 is arranged at the bottom end of the exhaust pipe body; the corrugated pipe 1 is provided with the drain hole 101, the top end of the water collecting tank 4 is provided with the water inlet hole 401, the drain pipe 5 is arranged between the drain hole 101 and the water inlet hole 401, the inner wall of the drain pipe 5 is fixedly connected with the semicircular pipe 502, the bottom end of the semicircular pipe 502 is fixedly connected with the circular truncated cone 501, and water inside the water collecting tank 4 can be prevented from entering the corrugated pipe 1 through the drain pipe 5 through the cooperation of the circular truncated cone 501 and the semicircular pipe 502.
The exhaust pipe body consists of a plurality of corrugated pipes 1 and two connecting pipes 2; the two ends of the corrugated pipes 1 are respectively fixed by the two connecting pipes 2, annular grooves are formed in the corrugated pipes 1, and water drops on the inner walls of the corrugated pipes 1 are collected in a concentrated mode through the annular grooves.
The noise reduction assembly comprises a second noise reduction plate 304 and a plurality of first noise reduction plates 3, wherein the second noise reduction plate 304 and the plurality of first noise reduction plates 3 are provided with flow holes 303, the second noise reduction plate 304 and the first noise reduction plates 3 are sequentially arranged at intervals along the air flow direction in the exhaust pipe body so as to divide the exhaust pipe body into a plurality of first speed reduction cavities, the volumes of the plurality of first speed reduction cavities are sequentially reduced along the air flow direction in the exhaust pipe body, and the second speed reduction cavity is formed in the second noise reduction plate 304; the volumes of the first speed reducing cavities are sequentially reduced along the air flow direction in the exhaust pipe body, so that the auxiliary muffler is beneficial to reducing noise of different frequencies of the air compressor, the noise elimination and noise reduction frequency band is widened, the NVH quality of the whole automobile is improved, the satisfaction of customers is improved, the size of the flow holes 303 is equal, and the flow holes 303 are coaxial with the exhaust pipe body.
Referring to fig. 2 and 4, the inner wall and the outer wall of the second noise reduction plate 304 and the first noise reduction plate 3 are provided with a plurality of second honeycomb grooves 302 and first honeycomb grooves 301; the inner walls of the first honeycomb groove 301 and the second honeycomb groove 302 are fixedly embedded with sound absorbing cotton, so that the internal noise of the exhaust pipe body is further absorbed.
Referring to fig. 2, the distance between two adjacent first noise reduction plates 3 decreases in sequence along the direction of the air flow in the exhaust pipe body; the inner wall and the outer wall of the first noise reduction plate 3 are of cone-shaped barrel structures, and the small-diameter end and the large-diameter end of the barrel structures are sequentially distributed along the air flow direction in the exhaust pipe body; both sides of the inner wall and both sides of the outer wall of the second noise reduction plate 304 are in a conical barrel-shaped structure, and the interior of the second speed reduction cavity is changed from big to small; wherein, when high wet tail gas passes through first speed reduction chamber and second speed reduction chamber, pressure reduction, the velocity of flow reduces, has reduced the liquid water that gets into the silencer greatly, has reduced the risk that the silencer is corroded, and liquid water that forms in every speed reduction chamber will get into header tank 4 through the wash port 101 of bottom to keep in header tank 4, need not to walk along with the car and discharge, solved and walk along with the car and discharged the problem that water can lead to the wet smooth or frozen road surface to the road surface, avoid a large amount of liquid water to remain in the blast pipe body simultaneously, cause the influence to the emission of tail gas.
Further, the water collecting tank 4 is provided with a water drain port, and the water drain port is provided with a water drain switch valve, so that water can be drained after the vehicle is stopped or stopped to a designated position, and the water in the water collecting tank 4 is prevented from being frozen when the temperature is low so as not to influence the next use; preferably, the water drain switch valve is an electromagnetic valve.
Further, the outer wall of the water collection tank 4 is provided with an insulating layer, so that water in the water collection tank 4 is insulated, and the water in the water collection tank 4 is prevented from freezing when the temperature is low. In other embodiments, the heat-insulating layer may be further disposed on the inner wall of the water tank 4, or the heat-insulating layer may be disposed on both the inner wall and the outer wall of the water tank 4.
Further, the inner wall of the exhaust pipe body is provided with a protective layer which is made of a material with hydrophobic performance and antirust performance; by arranging the protective layer, rust prevention can be realized, water in the high-humidity tail gas can be changed into liquid water, and the liquid water is discharged into the water collection tank 4 through the water discharge hole 101;
further, a hydrogen inlet is arranged on the exhaust pipe body, and a hydrogen switch valve is arranged on the hydrogen inlet. Preferably, the hydrogen inlet is arranged on the exhaust pipe body forming the first deceleration cavity positioned at the downstream, the hydrogen inlet is arranged on the top wall of the exhaust pipe body, and the hydrogen switch valve is an electromagnetic valve, so that the additional tail noise emission generated by the hydrogen pulse airflow is reduced through the FCU control strategy.
The working principle of the utility model is as follows: the first noise reduction groove 301 and the second noise reduction groove 302 are formed in the outer wall and the inner wall of the first noise reduction plate 3 and the second noise reduction plate 304 in an integral mode, sound absorption cotton is fixedly connected to the inner wall of the first noise reduction groove 301 and the inner wall of the second noise reduction groove 302, noise impacted on the first noise reduction plate 3 and the second noise reduction plate 304 can be absorbed through the sound absorption cotton, noise impact can be avoided, echoes can be generated on the noise reduction plate, meanwhile, the noise can be absorbed and eliminated, and the noise reduction effect is improved.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather, although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (8)
1. An exhaust device of a fuel cell engine comprises an exhaust pipe body for circulating engine tail gas, wherein a noise reduction assembly is arranged in the exhaust pipe body, and a water collection tank (4) is arranged at the bottom end of the exhaust pipe body;
the exhaust pipe is characterized by comprising a plurality of corrugated pipes (1) and two connecting pipes (2);
the noise reduction assembly comprises a second noise reduction plate (304) and a plurality of first noise reduction plates (3), wherein the second noise reduction plate (304) and the plurality of first noise reduction plates (3) are respectively provided with a flow hole (303), the second noise reduction plate (304) and the first noise reduction plates (3) are sequentially arranged at intervals along the air flow direction in the exhaust pipe body so as to divide the exhaust pipe body into a plurality of first speed reduction cavities, the volumes of the plurality of first speed reduction cavities are sequentially reduced along the air flow direction in the exhaust pipe body, and the second speed reduction cavities are formed in the second noise reduction plates (304);
the inner walls and the outer walls of the second noise reduction plate (304) and the first noise reduction plate (3) are respectively provided with a plurality of second honeycomb grooves (302) and first honeycomb grooves (301), and sound absorption cotton is embedded in the first honeycomb grooves (301) and the second honeycomb grooves (302).
2. An exhaust device of a fuel cell engine according to claim 1, wherein a plurality of said bellows (1) are fixedly connected between adjacent ones, and two of said connection pipes (2) are respectively fixed to both ends of the bellows (1).
3. An exhaust device of a fuel cell engine according to claim 1, characterized in that the distance between adjacent two of the first noise reduction plates (3) decreases in sequence in the direction of the air flow in the exhaust pipe.
4. The exhaust device of the fuel cell engine according to claim 1, wherein the inner wall and the outer wall of the first noise reduction plate (3) are tapered barrel-shaped structures, and the small-diameter end and the large-diameter end of the barrel-shaped structures are sequentially distributed along the air flow direction in the exhaust pipe body.
5. The exhaust apparatus of a fuel cell engine according to claim 1, wherein both sides of the inner wall and both sides of the outer wall of the second noise reduction plate (304) are tapered barrel-like structures, and the interior of the second deceleration chamber is changed from large to small.
6. The exhaust device of the fuel cell engine according to claim 1, wherein the corrugated pipe (1) is provided with a drain hole (101), the top end of the water collection tank (4) is provided with a water inlet hole (401), and a drain pipe (5) is arranged between the drain hole (101) and the water inlet hole (401).
7. The exhaust device of a fuel cell engine according to claim 6, wherein the inner wall of the drain pipe (5) is fixedly connected with a semi-circular pipe (502), and the bottom end of the semi-circular pipe (502) is fixedly connected with a truncated cone (501).
8. An exhaust apparatus of a fuel cell engine according to claim 1, wherein the inner wall of the exhaust pipe body is provided with a protective layer made of a material having a water repellent property and an antirust property.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320838475.2U CN220121893U (en) | 2023-04-14 | 2023-04-14 | Exhaust device of fuel cell engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320838475.2U CN220121893U (en) | 2023-04-14 | 2023-04-14 | Exhaust device of fuel cell engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220121893U true CN220121893U (en) | 2023-12-01 |
Family
ID=88917082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320838475.2U Active CN220121893U (en) | 2023-04-14 | 2023-04-14 | Exhaust device of fuel cell engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220121893U (en) |
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2023
- 2023-04-14 CN CN202320838475.2U patent/CN220121893U/en active Active
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