CN209990643U

CN209990643U - Noise reduction device of roots air compressor for fuel cell

Info

Publication number: CN209990643U
Application number: CN201920631085.1U
Authority: CN
Inventors: 邢子义; 陈文卿; 王升科; 谢元豪; 王明
Original assignee: Yantai Lingchen Energy Co Ltd
Current assignee: Yantai Dongde Hydrogen Energy Technology Co Ltd
Priority date: 2019-05-05
Filing date: 2019-05-05
Publication date: 2020-01-24
Anticipated expiration: 2029-05-05

Abstract

The utility model relates to a device of making an uproar falls for fuel cell's roots air compressor machine, a serial communication port, include: the inner pipe is communicated with an exhaust port of the Roots air compressor; the sleeve is arranged outside the inner pipe, two ends of the sleeve are hermetically connected with the surface of the inner pipe, and a cavity is arranged between the sleeve and the inner pipe; the noise reduction unit comprises a partition plate arranged along the surface of the inner pipe, the partition plate is connected with the surface of the inner pipe and the inner wall of the sleeve, the cavity is divided into at least two silencing cavities, a plurality of through holes are formed in the surface of the inner pipe corresponding to each silencing cavity, and each silencing cavity is matched with the corresponding through hole to eliminate noises of different frequency sections. The utility model discloses a noise frequency to all operating modes of roots's air compressor machine tests, through corresponding analysis and calculation, every noise reduction unit of group handles the noise of a frequency range, and all operating mode scopes have been compromise to the unit of making an uproar that falls in the multiunit, and all middle and high frequency noises that let the people uncomfortable of elimination that can be selective remain the part and make the comfortable low-frequency noise of people.

Description

Noise reduction device of roots air compressor for fuel cell

Technical Field

The utility model relates to a device of making an uproar falls for fuel cell's roots air compressor machine.

Background

The fuel cell automobile is an automobile using electric power generated by an on-board fuel cell device as power, while an air compressor plays an important role in a fuel cell system, but the air compressor is a strong noise device, the noise level of the air compressor is high, the high frequency is prominent, the propagation distance is long, the pollution range is large, particularly, the frequency of certain noise is close to the inherent frequency of human internal organs, and the resonance is easy to cause symptoms such as dizziness, nausea, tachycardia, hypertension and the like of a human body. The noise reduction measure of the prior air compressor is to arrange a sound absorption material outside the air compressor, but the simple noise reduction measure has a common effect, especially the high-speed airflow at the exhaust port of the air compressor can generate great noise in a pipeline, the blade number of the rotor of the air compressor is different from two to six blades, the noise frequencies generated by the air compressors with different rotor blade numbers in the operation process are also different, the traditional sound absorption material can only absorb and block the noise with certain frequency, the noise with a plurality of frequencies can not be effectively processed, especially after being applied to a fuel cell automobile, because the fuel cell device has no mechanical transmission part, the noise pollution is avoided, the noise generated by the air compressor in a fuel cell system can be particularly prominent, the noise of the vehicle in the operation process can be increased, the driving experience is influenced, and the noise in a certain single frequency section is easier to process, however, for the fuel cell air compressor, especially for the vehicle-mounted fuel cell air compressor, the variation range of the rotating speed and the pressure is very wide, and the processing difficulty of noise is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a noise reduction device for roots air compressor of fuel cell, its structural design is reasonable, through testing the noise frequency of all operating modes of roots air compressor, through corresponding analysis and calculation, the noise of a frequency section is handled to every group of noise reduction unit, all operating mode scopes have been compromise to multiunit noise reduction unit, can be selective eliminate all middle and high frequency noise that lets people uncomfortable, the part makes the comfortable low frequency noise of people that remains, make the sound of persisting produce and accelerate the sensation; the connecting pipe is communicated with the exhaust port of the Roots air compressor, when the silencer is actually installed and used, the connecting pipe can flexibly rotate along the connecting surface of the exhaust port of the Roots air compressor, the installation direction of the silencer can be selected according to actual requirements, and the universality of equipment is improved; and at the outside casing that sets up of roots air compressor machine and inhale the sound material, can effectively the diffusion of separation roots air compressor machine noise, casing and sound absorption portion cooperation noise reduction unit can effectively separate and fall the noise under the roots air compressor machine running state, have solved the problem that exists among the prior art.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a noise reduction device of a Roots air compressor for a fuel cell, comprising:

the inner pipe is communicated with an exhaust port of the Roots air compressor;

the sleeve is arranged outside the inner pipe, two ends of the sleeve are hermetically connected with the surface of the inner pipe, and a cavity is arranged between the sleeve and the inner pipe;

the noise reduction unit comprises a partition plate arranged on the surface of the inner pipe, the partition plate is connected with the surface of the inner pipe and the inner wall of the sleeve, so that the cavity is divided into at least two silencing cavities, each silencing cavity corresponds to the inner pipe surface, a plurality of through holes are formed in the inner pipe surface, and each silencing cavity corresponds to the through holes to be matched with the through holes so as to eliminate noises with different frequencies.

Furthermore, the sleeve is internally provided with a plurality of silencing cavities, and the number of the corresponding through holes between the silencing cavities is different.

Further, the sleeve comprises a first sleeve and a second sleeve, and the radial size of the second sleeve and the internal sound-deadening cavity thereof is smaller than that of the first sleeve and the internal sound-deadening cavity thereof.

Furthermore, a connecting pipe is arranged between the inner pipe and the sleeve and the exhaust port of the Roots air compressor, an interlayer is arranged in the connecting pipe, and a sound absorption part is arranged in the interlayer.

Furthermore, the end part of the connecting pipe is provided with an installation plate, the installation plate is connected with an exhaust port of the Roots air compressor, the end surface of the installation plate is provided with a groove, and the radial size of the groove is smaller than or equal to the size of the exhaust port of the Roots air compressor and larger than the inner diameter of the connecting pipe.

Furthermore, the shape of the connecting pipe is set according to the installation requirement of the Roots air compressor.

Furthermore, the connecting pipe is a bent pipe, the connecting surfaces at two ends of the bent pipe are generally perpendicular to each other, the inner pipe and the sleeve are generally horizontally arranged along the axial direction of the rotor of the Roots air compressor after the inner pipe and the sleeve are connected with the exhaust port of the Roots air compressor through the connecting pipe.

Furthermore, a shell is arranged outside the Roots air compressor, a gap is formed between the inner wall of the shell and the outer wall of the Roots air compressor, and a sound absorption part is arranged at the position of the gap so as to block noise of the Roots air compressor.

Furthermore, the mounting plate of the connecting pipe is connected with the shell, the exhaust airflow of the Roots air compressor flows out of the shell and enters the connecting pipe, and the mounting plate and the exhaust port of the Roots air compressor are arranged in a staggered mode in the vertical direction.

Furthermore, an air inlet cover is arranged at the position of an air inlet of the Roots air compressor, a profiling part is arranged on the outer wall of the air inlet cover, and the profiling part and the air inlet of the Roots air compressor are arranged correspondingly, so that external air can directly enter the air inlet along the air inlet cover.

The utility model adopts the above structure has the advantages that the structure design is reasonable, the noise frequency of all working conditions of the Roots air compressor is tested, each group of noise reduction units processes the noise of one frequency section through corresponding analysis and calculation, the multi-group noise reduction units take into account all working condition ranges, all uncomfortable middle and high frequency noises can be selectively eliminated, part of the low frequency noise is kept to make people comfortable, and the reserved sound generates acceleration feeling; the connecting pipe is communicated with the exhaust port of the Roots air compressor, when the silencer is actually installed and used, the connecting pipe can flexibly rotate along the connecting surface of the exhaust port of the Roots air compressor, the installation direction of the silencer can be selected according to actual requirements, and the universality of equipment is improved; and at the outside casing that sets up of roots air compressor machine with inhale the sound material, can effectively the diffusion of separation roots air compressor machine noise, the casing can effectively be separated and fall the noise to the noise under the roots air compressor machine running state with the unit of making an uproar that falls of sound absorption portion cooperation.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

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

Fig. 3 is a schematic view of the cross-sectional structure of the present invention.

Fig. 4 is a schematic perspective view of the air intake cover of the present invention. In the figure, 1, an inner tube; 2. a sleeve; 3. A Roots air compressor; 4. a partition plate; 5. a sound-deadening chamber; 6. a first sleeve; 7. a second sleeve; 8. a through hole; 9. A connecting pipe; 10. an interlayer; 11. mounting a plate; 12. a groove; 14. a housing; 15. an air intake hood; 16. a profiling portion; 17. an air inlet.

Detailed Description

In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1-4, the noise reduction device for the roots air compressor of the fuel cell comprises an inner tube 1, a sleeve 2 and a noise reduction unit, wherein the inner tube 1 is communicated with an exhaust port of the roots air compressor 3; the sleeve 2 is arranged outside the inner pipe 1, two ends of the sleeve 2 are hermetically connected with the surface of the inner pipe 1, and a cavity is arranged between the sleeve 2 and the inner pipe 1; the noise reduction unit comprises a partition plate 4 arranged on the surface of the inner pipe 1, the partition plate 4 is connected with the surface of the inner pipe 1 and the inner wall of the sleeve 2, the cavity is divided into at least two silencing cavities 5, a plurality of through holes 6 are formed in the surface of the inner pipe 1 corresponding to each silencing cavity 5, and each silencing cavity 5 is matched with a corresponding through hole 8 to eliminate noises with different frequencies. When the silencer is used, the through hole 8 of the inner pipe 1 is communicated with the silencing cavity 5, after airflow enters the inner pipe 1 from the exhaust port of the Roots air compressor 3, the airflow can be sprayed into the silencing cavity 5 along the through hole 8, the frequency spectrum of jet noise can move to high frequency or ultrahigh frequency, audible components in the frequency spectrum are obviously reduced, interference and damage to people are reduced, and the silencing effect is good; the distance and the number of the through holes 8 corresponding to each silencing cavity 5 are calculated according to the actually measured noise frequency spectrum of the Roots air compressor 3.

It is worth mentioning that the setting mode of the silencing cavity 5 of the Roots air compressor 3 of different types cannot be general, and the noise spectrum of the Roots air compressor is actually measured according to the actual working condition of the Roots air compressor 3, and the structure and the size corresponding to the silencing cavity 5 and the through hole 8 are calculated and designed.

In a preferred embodiment, a plurality of silencing cavities 5 are arranged in the casing 2, and the number of the through holes 8 corresponding to the plurality of silencing cavities 5 is different, specifically, the number of the through holes 8 corresponding to the plurality of silencing cavities 5 can be increased or decreased along the airflow direction in the inner tube 1, or can be arranged in disorder. When the silencer is used, after airflow sequentially passes through the plurality of silencing cavities 5, noises of different frequency sections are eliminated when the airflow passes through different silencing cavities 5, so that the silencing effect is more stable. It will be appreciated that the plurality of sound-deadening chambers 5 may be arranged in any combination, which is capable of effectively dealing with noise.

In a preferred embodiment, the cannula 2 comprises a first cannula 6 and a second cannula 7, the second cannula 7 and its internal sound-deadening chamber 5 having a radial dimension smaller than the radial dimension of the first cannula 6 and its internal sound-deadening chamber 5, in view of the ease of machining and the dimensional requirements of the cannula 2. Under the unchangeable circumstances of radial dimension at first sleeve 6, in order to eliminate the noise of higher frequency, need the quantity of through-hole 8 more and more, but because the amortization chamber 5 volume in the first sleeve 6 is unchangeable, lead to the unable more through-hole 8 quantity that sets up of the inner tube 1 area that amortization chamber 5 corresponds, can reduce the intensity of inner tube 1 after through-hole 8 quantity is too much moreover, after the radial dimension of second sleeve 7 reduces in this scheme, cooperate its 8 quantity of through-hole that corresponds, the noise of higher frequency can effectively be eliminated.

It is worth mentioning that the position relationship of the first sleeve 6 and the second sleeve 7 with respect to the connection pipe 9 is arbitrarily set, i.e. the first sleeve 6 or the second sleeve 7 can be connected with the connection pipe 9.

In the preferred embodiment, a connecting pipe 9 is arranged between the inner pipe 1 and the sleeve 2 and the exhaust port of the Roots air compressor 3, an interlayer 10 is arranged in the connecting pipe 9, and a sound absorption part is arranged in the interlayer 10. During the use, receive the limitation of 3 installation spaces of roots air compressor machine, inner tube 1 and sleeve pipe 2 can not directly arrange at will along the gas vent of roots air compressor machine 3 with the outside pipeline of giving vent to anger, need turn round the processing to the pipeline of giving vent to anger under the many circumstances, extra repacking is wasted time and energy, inconvenient use, leads to the commonality of 3 equipment of making an uproar of roots air compressor machine to descend.

It is understood that the sound absorbing portion may be made of sound absorbing material such as sound absorbing cotton, foamed aluminum or wire mesh.

In the preferred embodiment, the end of the connecting pipe 9 is provided with a mounting plate 11, the mounting plate 11 is connected with the exhaust port of the roots air compressor 3, the end surface of the mounting plate 11 is provided with a groove 12, and the radial dimension of the groove 12 is smaller than or equal to the dimension of the exhaust port of the roots air compressor 3 and larger than the inner diameter dimension of the connecting pipe 9. When the gas flow buffering device is used, gas flow discharged from the gas outlet of the Roots compressor 3 can be effectively buffered when passing through the groove 12, the buffered gas flow enters the connecting pipe 9, the groove 12 has the functions of pressure reduction and capacity expansion on the gas flow, the mounting direction of the connecting pipe 9 can be allowed to be more flexible, the gas outlet direction of the gas outlet of the Roots compressor 3 does not need to be complied, multiple orientations can be selected, and the gas flow buffering device is more convenient to mount and use; and the mounting panel 11 makes things convenient for the gas vent of inner tube 1 and sleeve pipe 2 and roots air compressor machine 3 to link to each other, and the bolt is selected for use to the gas vent of mounting panel 11 and roots air compressor machine 3 and links to each other.

In the preferred embodiment, the shape of the connecting pipe 9 is set according to the installation requirements of the roots air compressor 3.

In a preferred embodiment, the connecting pipe 9 is a bent pipe, the connecting surfaces at two ends of the bent pipe are approximately perpendicular to each other, the inner pipe 1 and the sleeve 2 are approximately horizontally arranged with the axial direction of the rotor of the roots air compressor 3 after the inner pipe 1 and the sleeve 2 are connected with the exhaust port of the roots air compressor 3 through the connecting pipe 9. The elbow is beneficial to gentle turning, and is beneficial to the installation layout of the inner pipe 1 and the sleeve 2 and an external air outlet pipeline.

In the preferred embodiment, the housing 14 is arranged outside the Roots air compressor 3, a gap is arranged between the inner wall of the housing 14 and the outer wall of the Roots air compressor 3, and the gap is provided with a sound absorption part to block the noise of the Roots air compressor. The casing 14 can be with stable fixing in roots air compressor 3 outside of sound absorption portion, make sound absorption portion and roots air compressor 3 surface hug closely and arrange, effective separation roots air compressor 3's noise makes the noise reduction unit concentrate the noise frequency who eliminates roots air compressor 3 production unfavorable to the human body.

The mounting plate 11 of the connecting pipe 9 is connected with the shell 14, the exhaust airflow of the exhaust port of the Roots air compressor 3 flows out of the shell 14 and enters the connecting pipe 9, and the mounting plate 11 and the exhaust port of the Roots air compressor 3 are arranged in a staggered mode in the vertical direction. During the use, can set up the mounting panel 11 of connecting pipe 9 in roots air compressor machine 3's middle part position, after the return bend form is selected to connecting pipe 9, can rotate the return bend orientation, make the subsequent amortization part of connecting pipe 9 and pipeline installation more convenient.

In a preferred embodiment, an air inlet cover 15 is arranged at the position of an air inlet of the roots air compressor 3, a profile part 16 is arranged on the outer wall of the air inlet cover 15, and the profile part 16 is arranged corresponding to the air inlet of the roots air compressor 3, so that external air can directly enter the air inlet 17 along the air inlet cover 15. During the use, profile modeling portion 16 is the design of indent, make outside air follow inlet cowling 15 direct current entering air inlet 17, produce the vortex when avoiding outside air flow direction air inlet 17, make the smooth air flow direction air inlet 17 through inlet cowling 15, because air inlet 17 carries out unique design according to roots air compressor machine 3's rotor blade shape, the profile modeling portion 16 of consequently designing can guarantee that the air gets into the air inlet smoothly, avoid the air inlet position to block the air flow and produce the vortex, in order to eliminate the noise that the air vortex arouses.

The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.

The parts of the present invention not described in detail are the known techniques of those skilled in the art.

Claims

1. The utility model provides a noise reduction device for roots air compressor of fuel cell which characterized in that includes:

2. The noise reduction device for a roots air compressor for a fuel cell as claimed in claim 1, wherein a plurality of the muffling chambers are provided in the sleeve, and the number of the through holes corresponding to the muffling chambers is different.

3. A noise reduction device for a roots air compressor for a fuel cell as set forth in claim 1 or 2, wherein the sleeve comprises a first sleeve and a second sleeve, the radial dimension of the second sleeve and its internal muffling chamber being smaller than the radial dimension of the first sleeve and its internal muffling chamber.

4. The noise reduction device for a roots air compressor for a fuel cell according to claim 3, wherein a connection pipe is provided between the inner pipe and the sleeve and the exhaust port of the roots air compressor, and the connection pipe is provided with an interlayer in which a sound absorbing part is provided.

5. The noise reduction device for a roots air compressor for a fuel cell according to claim 4, wherein the end of the connection tube is provided with a mounting plate, the mounting plate is connected with the exhaust port of the roots air compressor, the end surface of the mounting plate is provided with a groove, and the radial dimension of the groove is smaller than or equal to the dimension of the exhaust port of the roots air compressor and larger than the inner diameter dimension of the connection tube.

6. The noise reduction device for a roots air compressor for a fuel cell according to claim 4 or 5, wherein the shape of the connection pipe is set according to installation requirements of the roots air compressor.

7. The noise reduction device for a roots air compressor for a fuel cell as claimed in claim 6, wherein the connecting tube is a bent tube, the connecting surfaces of the two ends of the bent tube are substantially perpendicular to each other, and the inner tube and the sleeve are substantially horizontally arranged along the axial direction of the rotor of the roots air compressor after the inner tube and the sleeve are connected to the exhaust port of the roots air compressor through the connecting tube.

8. The noise reduction device for a roots air compressor for a fuel cell according to claim 7, wherein a housing is provided on an outside of the roots air compressor, a gap is provided between an inner wall of the housing and an outer wall of the roots air compressor, and the gap is provided with a sound absorbing portion to block noise of the roots air compressor.

9. The noise reduction device for a roots air compressor for a fuel cell according to claim 8, wherein the mounting plate of the connecting tube is connected to the housing, the discharge flow of the roots air compressor is discharged from the housing into the connecting tube, and the mounting plate and the discharge port of the roots air compressor are staggered in a vertical direction.

10. The noise reduction device for a roots air compressor for a fuel cell according to any one of claims 7 to 9, wherein an inlet port of the roots air compressor is provided with an inlet cover, an outer wall of the inlet cover is provided with a profile portion, and the profile portion is arranged corresponding to the inlet port of the roots air compressor so that external air flows straight along the inlet cover into the inlet port.