CN211777770U

CN211777770U - Air inlet filtering silencer

Info

Publication number: CN211777770U
Application number: CN202020143784.4U
Authority: CN
Inventors: 王笃勇; 朱金晏; 徐贝贝; 夏梦; 蒋吕; 马德树; 孟垂举
Original assignee: 711th Research Institute of CSIC
Current assignee: 711th Research Institute of CSIC
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-10-27
Anticipated expiration: 2030-01-21

Abstract

The utility model discloses a filter muffler admits air, including casing, filter unit and noise elimination unit. The shell comprises a side wall, a cover plate detachably connected to the top of the side wall and an end plate arranged at the bottom of the side wall, and the end plate is provided with an air outlet; the filtering unit is detachably arranged in the shell and is positioned below the cover plate, and the filtering unit and the cover plate enclose a gas collecting cavity; the noise elimination unit is arranged in the shell and is positioned below the filtering unit and above the end plate. According to the intake filter muffler of the utility model, the filter unit is detachably arranged at the upstream of the muffler unit, so that the filter unit can be conveniently replaced and maintained after reaching the service life or being damaged, the assembly process is simple, and the assembly can be carried out by opening the cover plate; in addition, the device has the advantages of light weight and small size.

Description

Air inlet filtering silencer

Technical Field

The utility model relates to the technical field of machinery, particularly, relate to a filter muffler admits air.

Background

Noise in the intake system of an internal combustion engine is one of the main noise sources of the internal combustion engine, and in many cases it determines the overall noise level of the internal combustion engine, which is a key factor affecting comfort of people. Meanwhile, in order to increase power and reduce fuel consumption, most internal combustion engines are equipped with turbochargers. The turbocharger is used as a high-speed rotating vane machine, the noise generated during operation is high in sound level, the noise generated during operation is up to 120dB, the tone is sharp and harsh, and the frequency of the turbocharger is up to 4000-6000 Hz. A part of the noise of the turbocharger enters the intake line of the internal combustion engine via the connecting line, resulting in a further increase in the noise of the intake system of the internal combustion engine.

In order to solve the above problems, the prior art integrates an air filter and a muffler. However, the prior art has many problems, such as large volume and large occupied space; the filter is not easy to disassemble and difficult to maintain and replace.

Therefore, the utility model provides an air inlet filtering silencer for at least partly solve the problem among the prior art.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

For at least partly solving the above-mentioned problem, the utility model provides an air inlet filter muffler, include:

the air conditioner comprises a shell, a fan and a control device, wherein the shell comprises a side wall, a cover plate detachably connected to the top of the side wall and an end plate arranged at the bottom of the side wall, and the end plate is provided with an air outlet;

the filtering unit is detachably arranged in the shell and is positioned below the cover plate, and a gas collecting cavity is defined by the filtering unit and the cover plate; and

the silencing unit is arranged in the shell and is positioned below the filtering unit and above the end plate.

According to the intake filter muffler of the utility model, the filter unit is detachably arranged at the upstream of the muffler unit, so that the filter unit can be conveniently replaced and maintained after reaching the service life or being damaged, the assembly process is simple, and the assembly can be carried out by opening the cover plate; in addition, the device has the advantages of light weight and small size.

Further, the casing still includes the baffle, the baffle sets up between filter unit and noise elimination unit, the baffle has a plurality of gas collection holes.

Furthermore, the silencing unit comprises a sound absorption core body and a sound absorption layer surrounding the sound absorption core body, the sound absorption core body and the sound absorption layer are separated and surround to form a silencing channel, and the silencing channel is communicated with the gas collecting cavity through the gas collecting hole.

Further, the gas collecting holes are in a fan-shaped ring shape, and the central angle of the fan-shaped ring shape is the ratio of 360 degrees to the number of the gas collecting holes.

Furthermore, the filtering unit is connected to the partition plate, a reinforcing rib is arranged between every two adjacent gas collecting holes, and one end, far away from the center of the partition plate, of the reinforcing rib extends to the filtering unit.

Further, the middle part of baffle is provided with the fastener, be provided with the through-hole on the apron, the casing still includes the connecting rod, the one end of connecting rod has spacing portion, the one end that the connecting rod was kept away from spacing portion passes the through-hole and is connected to the fastener, in order with the apron with the lateral wall is together fixed.

Furthermore, a plurality of air inlet holes are formed in the upper part of the side wall corresponding to the filtering unit.

Further, the sound absorbing core is connected to a middle portion of the partition.

Further, the bottom of the sound absorbing core is configured to be tapered with its apex facing the air outlet, and the bottom of the sound absorbing layer is configured to have a tapered surface facing the tapered surface of the sound absorbing core.

Further, the noise elimination unit also comprises a guard plate, a plurality of through holes are formed in the guard plate, and the guard plate is constructed as a wall surface of the noise elimination channel.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.

In the drawings:

fig. 1 is a schematic perspective view of an intake filter muffler according to the present invention;

FIG. 2 is a schematic half-sectional view of an inlet filter muffler according to the present invention;

fig. 3 is a schematic view of the working principle of the intake filter muffler according to the present invention;

FIG. 4 is a schematic sectional view taken along line A-A in FIG. 2;

FIG. 5 is a schematic perspective view of the baffle of FIG. 2;

FIG. 6 is a schematic view of the acoustic core of FIG. 2; and

fig. 7 is a perspective view of the cover plate of fig. 2.

Description of reference numerals:

100: the intake filter muffler 110: shell body

111: side wall 112: cover plate

113: end plate 114: partition board

115: reinforcing rib 116: fastening piece

117: connecting rod 118: limiting part

119: the groove portion 120: filter unit

121: gas collection chamber 122: gas collecting hole

123: air intake holes 130: noise elimination unit

131: the sound-absorbing core 132: sound absorption layer

133: the muffler passage 134: guard board

135: air outlet 136: flange

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In the following description, a detailed description will be given for a thorough understanding of the present invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are used herein for purposes of illustration only and are not limiting.

Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.

The intake filter muffler of the present invention will be described in detail with reference to fig. 1 to 7.

Fig. 1, 2 and 3 show an intake filter muffler 100 of the present invention, which includes a housing 110, a filter unit 120 and a muffler unit 130. The filter unit 120 and the muffler unit 130 are both disposed inside the case 110 and the filter unit 120 is located above the muffler unit 130.

The housing 110 includes a side wall 111, a cover plate 112 (shown in fig. 7), and an end plate 113. The side wall 111 is substantially configured as a cylindrical structure. The cover plate 112 is detachably coupled to the top of the sidewall 111. The end plate 113 is fixedly connected to the bottom of the side wall 111, for example, the end plate 113 can be welded to the bottom of the side wall 111, and the end plate 113 is opened with an air outlet 135. The outlet port 135 is adapted to communicate with an intake conduit of an internal combustion engine via a flange 136.

The filter unit 120 is detachably disposed in the housing 110 and located below the cover plate 112, and the filter unit 120 and the cover plate 112 enclose a gas collecting chamber 121. The muffler unit 130 is located between the filter unit 120 and the end plate 113. A metal screen, preferably a plurality of metal screens with different filtering specifications, may be disposed in the filtering unit 120.

According to the intake filter muffler of the present invention, the filter unit 120 is detachably disposed at the upstream of the muffler unit 130, so that the filter unit 120 can be conveniently replaced and maintained after reaching its service life or being damaged, and the assembly process is simple, and the assembly can be performed by opening the cover plate 112; in addition, the device has the advantages of light weight and small size.

In particular, reference is made to fig. 2, 3 and 5. The upper portion of the housing 110 is also provided with a partition 114, and the partition 114 is fixedly connected to the side wall 111 in the axial direction of the side wall 111. The muffler unit 130 is located below the partition 114, and the filter unit 120 is located above the partition 114. The separator 114 has a plurality of gas collection holes 122. in the illustrated embodiment, 4 gas collection holes 122 are provided in the shape of a fan ring to balance the ventilation and the structural strength of the separator 114. In embodiments not shown, 2, 3, 5 or 6, etc. gas collection holes 122 may also be provided. The shape of the gas collecting hole 122 may be a fan-shaped ring, or may be other shapes such as a circle.

When the gas collection holes 122 are in the shape of a fan ring as shown in fig. 5, the central angle of the fan ring is 360 ° relative to the number of gas collection holes 122. I.e. the central angle of the 4 sectors is 90 deg.. The central angle of the 2 fan-shaped rings is 180 degrees. The central angle of the 3 fan-rings is 120 deg.. The central angle of the 6 sectors is 60 °.

Referring to fig. 2, 3 and 7, a fastener 116 is disposed in the middle of the partition 114, a through hole is disposed on the cover plate 112, the housing 110 further includes a connecting rod 117, one end of the connecting rod 117 has a limiting portion 118, and one end of the connecting rod 117, which is far away from the limiting portion 118, passes through the through hole and is connected to the fastener 116 to fix the cover plate 112 and the side wall 111 together.

The connecting rod 117 is preferably threaded at the bottom and the fastener 116 is preferably a nut, both of which are threadedly connected. The fastener 116 may be secured to the center of the baffle plate 114 by welding.

In an alternative embodiment, the edge of the cover plate 112 may be provided with a channel 119, the channel of which is arranged downwards. When the cover plate 112 is attached to the side wall 111, the top of the side wall 111 enters the groove of the channel 119 to achieve positioning of the cover plate 112.

When the cover plate 112 is required to be installed on the side wall 111, only the connecting rod 117 needs to be inserted into the through hole in the cover plate 112, the fastener 116 is arranged right below the through hole, the connecting rod 117 is screwed into the fastener 116, the limiting part at the top of the connecting rod 117 is abutted to the cover plate, and the limiting part can tightly press the cover plate 112 along with the continuous screwing of the connecting rod 117 into the fastener 116. When the cover plate 112 needs to be detached, the connecting rod 117 only needs to be rotated reversely to detach the cover plate.

The filter unit 120 is connected to the separator 114 from above the separator 114, and specifically the filter unit 120 is disposed on a portion between an outer edge of the separator 114 and an outer arc of the air collecting hole 122. A portion of the upper portion of the sidewall 111 corresponding to the filter unit 120 is provided with a plurality of air intake holes 123.

In order to improve the structural strength of the separator 114 and prevent the filter unit 120 or the connecting rod 117 from damaging the separator 114, a reinforcing rib 115 is provided at a portion between two adjacent gas collecting holes 122 of the separator 114. An end of the reinforcing rib 115 near the center of the partition 114 is connected to the fastening member 116, and an end of the reinforcing rib 115 away from the center of the partition 114 extends to the filter unit 120, thereby also locating the installation position of the filter unit 120. In the illustrated embodiment, four ribs are provided.

Referring to fig. 2, 3, and 4, the sound-deadening unit 130 includes a sound-absorbing core 131 and a sound-absorbing layer 132. Wherein the sound absorbing core 131 is connected to the middle of the partition 114 from below the partition 114, and a substantially annular sound absorbing layer 132 is provided around the sound absorbing core 131. In other words, the acoustic layer 132 is disposed in the circumferential direction of the acoustic core 131.

The sound-absorbing layer 132 is spaced apart from the sound-absorbing core 131, and the top of the sound-absorbing layer 132 is connected to the partition 114 and the bottom thereof is connected to the end plate 113, and the side of the sound-absorbing layer 132 remote from the sound-absorbing core 131 is connected to the side wall 111 of the housing 110. The sound-absorbing layer 132 thus surrounds the sound-absorbing core 131, the space enclosed by the two constituting the sound-damping channel 133. And the sound-deadening channel 133 and the gas-collecting chamber 121 communicate via the gas-collecting hole 122. The sound absorption core body 131 is arranged in the sound absorption layer 132, so that the high-frequency failure frequency of the noise elimination unit 130 can be effectively improved, and the noise elimination effect of the air inlet filtering silencer 100 on high-frequency air inlet noise is improved.

Both the acoustic core 131 and the acoustic layer 132 are made of an acoustic absorbing material, preferably melamine foam, in order to reduce the weight of the product. Of course, the sound absorbing material may be a porous material such as polyurethane foam. The exterior of the sound absorbing material is preferably wrapped with a waterproof vapor permeable membrane.

Furthermore, the outer part of the sound-absorbing core 131 and the side of the sound-absorbing layer 132 facing the sound-damping channel 133 are provided with a cover 134, the cover 134 thereby being configured as a wall surface of the sound-damping channel 133. The shield 134 is provided with a plurality of perforations to facilitate the diffraction of sound waves into the sound absorbing material.

Referring now to fig. 2, 3 and 6, the bottom of the acoustic core 131 is configured to be tapered with its apex facing the air outlet 135, whereby the acoustic core 131 as a whole is substantially cylindrical with a conical bottom. The bottom of the sound absorbing layer 132 is configured to have a tapered surface facing the tapered surface of the sound absorbing core 131. The cone angle alpha of the bottom of the acoustic core 131 is between 80 deg. and 100 deg., preferably 90 deg.. The conical surface of the bottom of the acoustic layer 132 is configured to be substantially parallel to the conical surface of the bottom of the acoustic core 131. Thus, the bottom of the muffler channel 133 is configured as a tapered flow guide structure, which can effectively reduce the pressure loss generated when the air passes through.

In addition, the conical structure at the bottom of the sound absorption core body 131 can further improve the noise elimination effect. When the sound waves are transmitted to the bottom of the sound absorbing core body 131, the sound waves are reflected under the action of the conical structure, so that the reflection times of the sound waves in the sound attenuation channel 133 are increased, and the sound attenuation effect is improved.

When the internal combustion engine runs, negative pressure is generated in the air inlet pipeline, air enters the filtering unit 120 through the air inlet hole 123 on the side wall 111 under the action of the negative pressure, is collected in the air collecting cavity 121 after being filtered, enters the noise elimination channel 133 through the air collecting hole 122, and then enters the air inlet pipeline through the air outlet 135.

Noise generated when the internal combustion engine or the turbocharger operates is transmitted from the intake port, and when the sound wave passes through the sound attenuation passage 133, the sound wave rubs and collides with the sacrificial material, and the energy of the sound wave is absorbed, thereby reducing intake noise.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An intake filter muffler, comprising:

2. The intake filter muffler of claim 1, wherein the housing further comprises a partition disposed between the filter unit and the muffler unit, the partition having a plurality of gas collection holes.

3. The intake filter muffler of claim 2, wherein the muffler unit includes a sound absorbing core and a sound absorbing layer surrounding the sound absorbing core, the sound absorbing core and the sound absorbing layer being spaced apart and enclosing a muffler channel, the muffler channel and the gas collecting chamber being communicated via the gas collecting hole.

4. The intake filter muffler of claim 2, wherein the gas collecting hole is constructed in a fan-shaped ring shape having a central angle of 360 ° in relation to the number of gas collecting holes.

5. The intake filter muffler of claim 4, wherein the filter unit is connected to the partition plate, and a reinforcing rib is disposed between two adjacent gas collecting holes, and an end of the reinforcing rib, which is away from the center of the partition plate, extends to the filter unit.

6. The intake filter muffler of claim 2, wherein a fastener is disposed at a middle portion of the partition plate, a through hole is disposed in the cover plate, and the housing further includes a connecting rod having a stopper at one end thereof, and an end of the connecting rod remote from the stopper passes through the through hole and is connected to the fastener to fix the cover plate and the side wall together.

7. The intake filter muffler according to claim 1, wherein a portion of the upper portion of the side wall corresponding to the filter unit is provided with a plurality of intake holes.

8. The intake filter muffler of claim 3, wherein the sound absorbing core is connected to a middle portion of the partition plate.

9. The intake filter muffler of claim 3, wherein the bottom of the sound absorbing core is configured to be tapered with its apex facing the outlet, and the bottom of the sound absorbing layer is configured to have a tapered surface facing the tapered surface of the sound absorbing core.

10. The intake filter muffler of claim 3, wherein the muffler unit further includes a guard plate having a plurality of perforations formed therein, the guard plate being configured as a wall surface of the muffler channel.