CN215292727U

CN215292727U - Bent pipe connecting structure and engine air inlet system

Info

Publication number: CN215292727U
Application number: CN202121096473.8U
Authority: CN
Inventors: 赵再朝; 李伟; 梁志涛; 郭保
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-12-24
Anticipated expiration: 2031-05-21

Abstract

The utility model relates to a bent siphunculus connection structure and engine air intake system, wherein, bent siphunculus connection structure includes shell and noise-abatement structure, the cavity has in the shell, and be equipped with crankcase ventilation pipe joint on the shell at least, empty filter is tracheal joint and is given vent to anger to connect, noise-abatement structure locates in the cavity, and noise-abatement structure is inside to be formed with the chamber of ventilating, and it has a plurality of noise elimination holes to construct on noise-abatement structure's lateral wall, ventilate chamber and cavity promptly via a plurality of noise elimination hole intercommunication, crankcase ventilation pipe joint communicates in with the cavity, the both ends in ventilation chamber then filter tracheal joint and give vent to anger to connect with the air respectively and link to each other. The utility model discloses a curved connecting structure of pipe, through construct a plurality of noise elimination holes on the lateral wall of noise elimination structure, can effectively reduce the noise of the gas that gets into in the shell; in addition, the gas entering the air from the joint of the crankcase ventilation pipe is intersected with the gas entering the ventilation cavity from the joint of the air filtering air pipe through each silencing hole, and the gas can be effectively prevented from freezing.

Description

Bent pipe connecting structure and engine air inlet system

Technical Field

The utility model relates to an engine air intake system technical field, in particular to bent pipe connection structure, simultaneously, the utility model discloses still relate to an engine air intake system with this bent pipe connection structure.

Background

With the continuous development of economic technology, the quantity of automobiles to be kept and the general range of automobiles are increased day by day, China is wide in regions, the temperature difference between the south and the north is extremely large, particularly in the northeast and the northwest, the temperature is often lower than-40 ℃, and the phenomenon of freezing and blocking frequently occurs at the joint of a ventilation pipe of a crankcase of a fuel vehicle and an air inlet pipe of an engine under the environment, so that the problems of engine oil pressure increase, engine oil seal disconnection and oil leakage of the engine are caused. In addition, along with the increasingly strict requirements on the NVH performance of automobiles, the requirements on the noise reduction and sound insulation of the air inlet pipeline of the engine are higher and higher. Therefore, it is important to provide a structure that can prevent the junction between the crankcase ventilation pipe and the air filtering pipe from freezing and reduce the noise of the air intake system.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a bent pipe connection structure, it can enough effectively prevent inside freezing, can effectively reduce the noise of admitting air again.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a bent pipe connecting structure comprises a shell and a silencing structure; wherein:

the shell is internally provided with a cavity, and at least a crankcase ventilation pipe joint, an air filtering air pipe joint and an air outlet joint are arranged on the shell;

the silencing structure is arranged in the cavity, a vent cavity is formed in the silencing structure, a plurality of silencing holes are formed in the side wall of the silencing structure, and the vent cavity is communicated with the cavity through the plurality of silencing holes;

the joint of the crankcase ventilation pipe is communicated with the cavity, and the joint of the air filtering pipe and the joint of the air outlet pipe are respectively communicated with the ventilation cavity.

Further, an airflow guide part is arranged in the cavity; the airflow guide is positioned between the crankcase ventilation pipe joint and the sound attenuation structure; the air flow guide is configured to guide the gas entering from the crankcase ventilation pipe joint to flow to the sound attenuation structure in a winding shape.

Further, along the direction from the air filtering air pipe joint to the air outlet joint, the cross section of the ventilation cavity and/or the cavity is gradually reduced.

Further, the shell is provided with an air leakage pipe joint and/or a carbon tank desorption pipe joint.

Further, the housing comprises a main body and a cover body arranged on the main body; the cavity is formed in the main body and can be covered by the cover body; the air filtering air pipe joint is arranged on the cover body, and the crankcase ventilation pipe joint and the air outlet joint are arranged on the main body.

Furthermore, a partition plate sleeved outside the silencing structure is arranged in the cavity; the plurality of partition plates are arranged at intervals along the length direction of the silencing structure; the partition plates divide the cavity into a communicating cavity communicated with the crankcase ventilation pipe joint and a plurality of silencing cavities positioned at two ends of the communicating cavity.

Further, a part of the sound attenuation structure, which is positioned in the sound attenuation cavity, is covered with a sound absorption layer.

Further, the sound absorption layer is made of sound absorption cotton or a porous material layer.

Furthermore, a supporting part extending into the cavity is arranged on the shell; the supporting parts are arranged at intervals along the length direction of the silencing structure; the partition plates are arranged in one-to-one correspondence with the supporting parts and are erected on the corresponding supporting parts.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses a curved expert's union coupling structure, through construct a plurality of noise elimination holes on the lateral wall of noise elimination structure to make the chamber of ventilating and cavity communicate through a plurality of noise elimination holes, not only can effectively reduce the noise of the gas that gets into in the shell; in addition, the gas entering the air from the joint of the crankcase ventilation pipe is intersected with the gas entering the ventilation cavity from the air filtering air pipe through each silencing hole, and the gas can be effectively prevented from freezing, so that the connecting structure of the crank pipe has a better using effect.

In addition, by arranging the gas flow guide portion to guide the gas entering from the crankcase ventilation pipe joint to flow to the sound attenuation structure in a circuitous shape, the flow path of the gas flowing to the sound attenuation structure can be extended, so that the crankcase gas can be sufficiently condensed into water at the gas flow guide portion, and the crankcase gas can be prevented from being frozen at the sound attenuation structure due to the intersection with the air-filtered gas. And along the direction that the air filtering air pipe connects to the joint of giving vent to anger, set up the cross section of ventilating chamber and/or cavity and diminish gradually, can have the noise reduction effect of eliminating high frequency noise earlier.

And secondly, an air leakage pipe joint and/or a carbon tank desorption pipe joint are arranged on the shell, so that other external pipelines can conveniently leak air into the cavity. Through setting up a plurality of baffles to separate the cavity for the intercommunication chamber and be located a plurality of noise elimination chambeies at intercommunication chamber both ends, can further improve noise reduction effect. The part of the silencing structure, which is positioned in the silencing cavity, is coated with the sound absorbing layer, so that the connecting structure of the curved tube can effectively eliminate radiation noise. The supporting part is arranged on the shell, and the partition board is arranged on the supporting part in an overlapping mode, so that the partition board can be conveniently arranged in the cavity.

Furthermore, the utility model discloses still relate to an engine air intake system, be equipped with in the engine air intake system as above the crank pipe connection structure.

Engine air intake system, through setting up as above the crank pipe connection structure, not only can reduce air intake system's noise, also can effectively avoid simultaneously filtering off the freezing jam of trachea department of meeting because of crankcase ventilation pipe and sky, and lead to the oil blanket oil leak, the oil blanket drops and damage the engine even.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a connecting structure of a flexible pipe according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural diagram of a main body according to an embodiment of the present invention;

fig. 5 is an assembly state diagram of the muffling structure, the upper baffle and the lower baffle according to the embodiment of the present invention.

Description of reference numerals:

1. a main body; 2. a crankcase ventilation pipe joint; 3. a cover body; 4. the air pipe joint is filtered out in an air mode; 5. a gas release pipe joint; 6. a carbon tank desorption pipe joint; 7. an air outlet joint; 8. a sound-deadening structure; 9. an anechoic chamber; 10. a communicating cavity; 11. a sound absorbing layer; 12. an upper partition plate; 13. a first baffle; 14. a second baffle; 15. a lower partition plate;

101. an upper support table; 102. a lower support table;

801. a sound-deadening aperture; 802. a vent lumen.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless expressly limited otherwise. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to a bent pipe connecting structure, which mainly comprises a shell and a silencing structure 8 on the whole structure.

Wherein, the shell is provided with a cavity, and at least a crankcase ventilation pipe joint 2, an air filtering air pipe joint 4 and an air outlet joint 7 are arranged on the shell. The silencing structure 8 is arranged in the cavity, a vent cavity 802 is formed inside the silencing structure 8, a plurality of silencing holes 801 are formed in the side wall of the silencing structure 8, and the vent cavity 802 is communicated with the cavity through the plurality of silencing holes 801. The crankcase ventilation pipe joint 2 is communicated with the inside of the cavity, and the air filtering air pipe joint 4 and the air outlet joint 7 are respectively communicated with the inside of the ventilation cavity 802. The air outlet joint 7 can be used for connecting with a supercharger or directly connecting with the engine according to different types of engines.

An exemplary structure of the connecting structure of the curved tube according to the present embodiment is shown in fig. 1 to 3 based on the above integral structure, at this time, the housing according to the present embodiment includes a main body 1 and a cover 3 provided on the main body 1, and the main body 1 and the cover 3 may be welded together for easy assembly, and welding ribs may be provided on the main body 1 and/or the cover 3 for easy welding operation.

In this embodiment, as a specific embodiment, as shown in fig. 3, only the main body 1 is provided with the welding rib, and the main body 1 is provided with the flash tank. Of course, the main body 1 and the cover 3 may be connected by other conventional methods such as screwing or riveting, but attention should be paid to the sealing performance between the main body 1 and the cover 3.

In addition, as shown in fig. 3, the cavity is formed in the main body 1 and can be covered by the cover 3, the air filter air pipe joint 4 is provided on the cover 3, and the crankcase ventilation pipe joint 2 and the air outlet joint 7 are provided on the main body 1. And the air filtering air pipe joint 4 and the air outlet joint 7 are oppositely arranged, the crankcase ventilation pipe joint 2 is arranged in the middle of the main body 1, and the specific structure of each joint can be just referred to the conventional structure. Here, based on the state shown in fig. 3, the "middle part" includes both the middle position in the height direction of the main body 1 and a position slightly above or below the middle.

As shown in fig. 2, the longitudinal section of the housing is arranged to be larger in the direction from the crankcase ventilation pipe connection 2 to the sound-damping structure 8 for better use. In addition, the specific structure of the main body 1 is combined with that shown in fig. 3 and 4, in order to improve the noise reduction effect, the cross section of the cavity is gradually reduced along the direction from the air filtering pipe joint 4 to the air outlet joint 7, so as to eliminate the high-frequency noise firstly. It should be noted that the structure of the main body 1 of the present embodiment is not limited to the shape shown in fig. 4, and the structure may be changed according to the design requirement, so that the following muffling chamber 9 can achieve the required noise reduction effect.

As shown in fig. 4, a release pipe joint 5 and a canister release pipe joint 6 are further provided on the main body 1 to communicate with the cavity, so as to allow other external pipes to release air into the cavity. Of course, in addition to the simultaneous installation of the air release pipe joint 5 and the canister release pipe joint 6 on the main body 1, only one of the two joints may be installed, and in addition to the simultaneous installation of the air release pipe joint 5 and the canister release pipe joint 6, other joints communicating with the cavity may be further installed.

In order to effectively prevent the air entering the cavity from the crankcase ventilation pipe joint 2 and the air entering the ventilation cavity from the air filtering pipe joint 4 from freezing in the ventilation cavity 802, as shown in fig. 3 and 4, an airflow guide part is arranged in the cavity. The air flow guide is located between the crankcase ventilation pipe joint 2 and the sound-deadening structure 8, and is configured to guide the air entering from the crankcase ventilation pipe joint 2 to flow in a serpentine shape to the sound-deadening structure 8.

As a specific embodiment, as shown in fig. 4, the airflow guide of the present embodiment includes a first baffle 13 and a second baffle 14 disposed facing the crankcase ventilation pipe joint 2, and the two baffles are disposed at a distance from each other, and the tops of the two baffles are respectively connected to the upper partition plate 12 described below. In addition, one end of the first baffle 13 is connected to the main body 1, and an opening through which gas entering from the crankcase ventilation pipe joint 2 passes is formed between the other end and the main body 1. Both ends of the second guide plate 14 are connected with the main body 1, and a gap for air to pass through is formed in the middle of the second guide plate. It should be mentioned here that the first baffle 13 and the second baffle 14 can be either integrally formed with the body 1 or welded or otherwise connected together.

With the above arrangement, the gas entering the cavity from the crankcase ventilation pipe joint 2 can be limited to flow to the silencing structure 8 in a winding shape as shown by the broken line in fig. 4, so that the gas can be fully condensed into water before flowing through the second baffle plate 14 and accumulated to the bottom of the cavity. Moreover, compared with the existing external icing box, in the embodiment, condensed water drops are accumulated in the cavity, so that the condensed water drops are not in direct contact with the outside cold air, the water drops can be effectively prevented from being condensed into ice, and when the vehicle runs in a warm environment, the condensed water drops can be volatilized into water vapor to gradually flow to the noise elimination structure 8, so that the formation of frost can be effectively reduced by the connecting structure of the flexible pipe.

Here, it should be noted that, in addition to the above structure, the airflow guiding portion may also be provided with three, four, and so on more guide plates, and the specific structure may be determined according to design requirements.

In this embodiment, to improve the noise reduction effect, a plurality of partition plates are disposed in the cavity and are sleeved outside the sound attenuation structure 8, and the partition plates are disposed at intervals along the length direction of the sound attenuation structure 8. And a plurality of baffles divide the cavity into a communicating chamber 10 communicating with the crankcase ventilation pipe joint 2 and a plurality of muffling chambers 9 located at both ends of the communicating chamber 10.

As a possible embodiment, as shown in fig. 3, the partition plates of the present embodiment are two that are provided at intervals in the length direction of the muffler structure 8 (i.e., the up-down direction shown in fig. 3), and include an upper partition plate 12 and a lower partition plate 15, respectively. The two silencing cavities 9 are respectively arranged at two ends of the shell, and the volumes of the silencing cavities 9 are different, so that the two silencing cavities 9 can respectively eliminate noises of two frequency bands. In addition, in the concrete implementation, the size of each muffling chamber 9 can be adjusted according to the muffling frequency.

To facilitate the arrangement of the partitions, the body 1 is provided with a support portion extending into the cavity, as also shown in figure 3. As shown in fig. 3 in conjunction with fig. 4, the support part of the present embodiment specifically includes an upper support table 101 and a lower support table 102 formed by the main body 1 itself protruding into the cavity. Wherein, the upper supporting platform 101 is a ring shape arranged along the circumference of the main body 1, and the upper clapboard 12 is specifically arranged on the upper supporting platform 101. Due to the second baffle 14, the lower support 102 is a semi-ring shape arranged along the circumferential direction of the main body 1, and a part of the lower baffle 15 is laid on the lower support 102, and the other part is connected to the second baffle 14.

It should be understood that, in addition to two partition boards, three partition boards, four partition boards, and the like may be provided. In addition, the upper support table 101 and the lower support table 102 may be a plurality of intermittently provided stages, in addition to being annular and semi-annular, respectively.

As shown in fig. 3 in combination with fig. 5, the muffler structure 8 of the present embodiment is specifically cylindrical, and the muffling holes 801 may be rectangular holes, elliptical holes, elongated holes, or other shapes, in addition to the circular shapes shown in fig. 5. Besides the same shape and aperture of each muffling hole 801, the muffling holes 801 in each muffling cavity 9 can be set to have different shapes and different apertures according to the muffling frequency, so as to achieve the required muffling effect through the combination of different hole types and muffling cavities 9. In addition, the silencing holes 801 with different hole types can be arranged in the same silencing cavity 9.

It should be noted that, in addition to the cylindrical shape with a circular cross section, the muffler structure 8 may also be another structure with a rectangular or other polygonal or even irregular cross section, but when the outer wall of the muffler structure 8 has an edge, the flow resistance of the gas may be increased, and the processing and manufacturing may be inconvenient.

In addition, to further improve the noise reduction effect, as shown in fig. 3, the cross section of the ventilation cavity 802 is gradually reduced along the direction from the air filtering air pipe joint 4 to the air outlet joint 7, that is, the sound attenuation structure 8 of the present embodiment is specifically in a cone shape. In addition, in order to eliminate the radiation noise, as shown in fig. 3, a part of the muffling structure 8 located inside the muffling chamber 9 is covered with a sound absorbing layer 11. And the sound absorption layer 11 is specifically a sound absorption cotton or a porous material layer, and the porous material layer is made of a sound absorption material commonly used by the existing vehicles.

The utility model provides a bent pipe connection structure through adopting above-mentioned structure, not only can effectively prevent that gas from freezing in inside, and the noise of a plurality of frequency channels can be eliminated again to the setting of simultaneously noise elimination hole 801, anechoic chamber 9 and sound absorbing layer 11 to can have better noise reduction, therefore can make this bent pipe connection structure have better result of use.

Besides, the embodiment also relates to an engine air inlet system, and the engine air inlet system is provided with the connecting structure of the crank pipe.

The engine air intake system of this embodiment, through setting up as above the bent pipe connection structure, not only can reduce air intake system's noise, also can effectively avoid simultaneously filtering off the frozen jam of trachea department of meeting because of crankcase ventilation pipe and sky, and lead to the oil blanket oil leak, the oil blanket drops and even damage the engine.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a bent pipe connection structure which characterized in that: the bent pipe connecting structure comprises a shell and a silencing structure (8); wherein:

the shell is internally provided with a cavity, and at least a crankcase ventilation pipe joint (2), an air filtering air pipe joint (4) and an air outlet joint (7) are arranged on the shell;

the silencing structure (8) is arranged in the cavity, a vent cavity (802) is formed inside the silencing structure (8), a plurality of silencing holes (801) are formed in the side wall of the silencing structure (8), and the vent cavity (802) is communicated with the cavity through the plurality of silencing holes (801);

the crankcase ventilation pipe joint (2) is communicated with the inside of the cavity, and the air filtering air pipe joint (4) and the air outlet joint (7) are respectively communicated with the inside of the ventilation cavity (802).

2. The labyrinth tube connection structure as recited in claim 1, wherein:

an airflow guide part is arranged in the cavity;

the air flow guide is located between the crankcase ventilation pipe joint (2) and the sound-attenuating structure (8);

the gas flow guide is provided to guide the gas entering from the crankcase ventilation pipe joint (2) to flow to the sound attenuation structure (8) in a winding shape.

3. The labyrinth tube connection structure as recited in claim 1, wherein: the cross section of the ventilation cavity (802) and/or the cavity is/are arranged to be smaller along the direction from the air filtering air pipe joint (4) to the air outlet joint (7).

4. The labyrinth tube connection structure as recited in claim 1, wherein: and the shell is provided with an air leakage pipe joint (5) and/or a carbon tank desorption pipe joint (6).

5. The labyrinth tube connection structure as recited in claim 1, wherein:

the shell comprises a main body (1) and a cover body (3) arranged on the main body (1);

the cavity is formed in the main body (1) and can be covered by the cover body (3);

the air filtering air pipe joint (4) is arranged on the cover body (3), and the crankcase ventilation pipe joint (2) and the air outlet joint (7) are arranged on the main body (1).

6. A labyrinth tube-connecting structure as claimed in any one of claims 1 to 5, wherein:

a clapboard sleeved outside the silencing structure (8) is arranged in the cavity;

the plurality of partition plates are arranged at intervals along the length direction of the silencing structure (8);

the cavity is divided into a communication cavity (10) communicated with the crankcase ventilation pipe joint (2) by the partition plates, and a plurality of silencing cavities (9) located at two ends of the communication cavity (10).

7. The labyrinth tube connection structure as recited in claim 6, wherein: the part of the silencing structure (8) positioned in the silencing cavity (9) is coated with a sound absorbing layer (11).

8. The labyrinth tube connection structure as recited in claim 7, wherein: the sound absorption layer (11) is made of sound absorption cotton or a porous material layer.

9. The labyrinth tube connection structure as recited in claim 6, wherein:

the shell is provided with a supporting part extending into the cavity;

the supporting parts are arranged at intervals along the length direction of the silencing structure (8);

the partition plates and the supporting parts are arranged in a one-to-one correspondence manner and are erected on the corresponding supporting parts.

10. An engine air intake system characterized by: the engine intake system is provided with the crank pipe connection structure of any one of claims 1 to 9.