CN214424608U - Air inlet pre-filtering structure - Google Patents

Abstract

The utility model provides an air inlet pre-filtering structure, which comprises a shell and a flow guide part, wherein a first separation cavity and a dust collection cavity arranged around the first separation cavity are arranged in the shell, a plurality of through holes communicated with the dust collection cavity are arranged along the circumferential direction of the first separation cavity, an air inlet and a first air outlet are arranged corresponding to the first separation cavity, and a first drain outlet is arranged at the bottom of the dust collection cavity; the guide part is positioned in the first separation cavity and is configured to guide the gas entering the first separation cavity from the gas inlet to swirl along the inner wall of the first separation cavity, so that impurities in the gas enter the dust collection cavity from the through hole due to centrifugal force. Air inlet prefilter structure, can make the gas that gets into first separation intracavity carry out centrifugal motion, most impurity in the gas and part of water get into the dust collection chamber via the through-hole to discharge via first drain, not only can improve gaseous cleanliness factor, but also do benefit to the noise of admitting air in the reduction casing, and have better result of use.

Description

Air inlet pre-filtering structure

Technical Field

The utility model relates to an automobile parts technical field, in particular to prefilter structure admits air.

Background

The off-road vehicle is a vehicle specially designed for off-road, and is mainly characterized by four-wheel drive, higher chassis, better grip tyre, higher exhaust pipe, higher horsepower and thick and firm bumper. The cross-country vehicle not only can adapt to various road conditions in the field, but also gives people a feeling of rough and luxurious, and in cities, many people like driving the cross-country vehicle.

In order to adapt to extreme environments such as riverways, deserts and the like, a pre-filter is usually additionally arranged in an air inlet system of an off-road vehicle type to filter impurities and water in air, so that the cleanliness of the air flowing into an air filter is improved, and air flow noise is easy to generate after the pre-filter is added.

In order to reduce noise, a muffler and noise reduction cotton are generally integrated, or a braided tube is used. However, these solutions have certain limitations, for example, the muffler usually needs a larger volume to achieve the muffling effect, but is difficult to achieve when the cabin space is insufficient; the arrangement cost of the noise reduction cotton is high, and the woven pipe is not a sealing structure, so that the problem of water inflow is easy to occur.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an it prefilters structure to admit air to improve gaseous cleanliness factor, and do benefit to and fall and make an uproar.

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

an intake pre-filtering structure comprising:

the dust collector comprises a shell, a dust collecting cavity and a dust collecting cavity, wherein the shell is internally provided with a first separation cavity and the dust collecting cavity is arranged around the first separation cavity, a plurality of through holes communicated with the dust collecting cavity are formed in the circumferential direction of the first separation cavity, an air inlet and a first air outlet are formed in the first separation cavity, and a first exhaust port is formed in the bottom of the dust collecting cavity;

and the flow guide part is positioned in the first separation cavity and is configured to guide the gas entering the first separation cavity from the gas inlet to circularly flow along the inner wall of the first separation cavity, so that impurities in the gas enter the dust collection cavity from the through hole due to centrifugal force.

Furthermore, a second separation cavity communicated with the first air outlet is arranged in the shell, a second sewage draining outlet is arranged at the bottom of the second separation cavity in a communicated manner, and a second air outlet is arranged above the second sewage draining outlet.

Furthermore, the housing comprises a first housing and a second housing covering a part of the outer wall of the first housing, and the first separation chamber and the dust collection chamber are located in the first housing, and the second separation chamber is defined between the first housing and the second housing.

Furthermore, the first air outlet is communicated with the upper part of the second separation cavity, and a first baffle plate arranged adjacent to the second air outlet is arranged above the second separation cavity.

Furthermore, a second baffle plate which is arranged right opposite to the second air outlet is arranged in the second separation cavity, and the second sewage draining outlet and the second air outlet are respectively positioned at two sides of the second baffle plate.

Further, an opening and closing valve is arranged on the first sewage draining port and/or the second sewage draining port, and the opening and closing valve is configured to be opened and closed in response to the pressure in the dust collecting cavity.

Further, the air inlet direction of the air inlet is tangent to the inner wall of the first separation cavity.

Furthermore, the shell comprises a body with an opening at the top, a cover body for blocking the opening, and a cylinder body connected to the cover body to separate the first separation chamber and the dust collection chamber, and the first air outlet is arranged on the cover body and extends into the first separation chamber.

Further, the water conservancy diversion portion is including locating a plurality of helical blades that are on the barrel inner wall.

Further, the blade is detachably connected to the cylinder.

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

intake prefilter structure, through first separation chamber and the dust collecting chamber that sets up in the casing to and locate the water conservancy diversion portion of first separation intracavity, the gas of first separation intracavity carries out centrifugal motion, most impurity in the gas and part of water get into the dust collecting chamber via the through-hole, and discharge through first drain, not only can improve gaseous cleanliness factor, still do benefit to the noise of admitting air in the reduction casing, and have better result of use.

In addition, can carry out the secondary filter to admitting air through setting up the second separation chamber, impurity and part of water can be discharged via the second drain in the gas, do benefit to further improvement to gaseous purifying effect. The shell adopts first shell and second shell, does benefit to the space occupation volume that reduces whole shell. And with first gas outlet in the top of second separation chamber, can make the gas that gets into in the second separation chamber flow from top to bottom, and the setting of first baffle then can block impurity and water and directly drop to the second gas outlet and flow. Through setting up the second baffle, then do benefit to impurity and the water that prevents the second separation chamber bottom and flow through the second gas outlet.

In addition, the setting of on-off valve does benefit to and carries out centralized processing to impurity and water, and it is then do benefit to the result of use that improves the on-off valve to open and close in response to pressure. The air inlet direction of the air inlet is tangent to the inner wall of the first separation cavity, so that the swirling flow effect of the air in the first separation cavity is improved. The body, the cover body and the cylinder body are simple in structure, convenient to design and implement and good in using effect. The guide part adopts the blades, and has the advantages of simple structure and good guide effect.

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 diagram of an intake prefilter structure according to an embodiment of the present invention;

fig. 2 is a front view of an intake prefilter structure according to an embodiment of the present invention;

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

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a sectional view taken along line C-C of FIG. 2;

description of reference numerals:

1. a first housing; 101. a cover body; 102. a body; 103. an air inlet; 104. a first air outlet; 105. a reinforcing plate; 106. a barrel; 107. a through hole; 108. a lower blade; 109. an upper blade; 110. a first drain port;

2. a second housing; 201. a recessed portion; 202. an air outlet pipe; 203. a first baffle plate; 204. a second baffle; 205. a second sewage draining outlet;

3. a first check valve; 4. a second one-way valve.

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", "outer", 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 to be construed as indicating or implying any particular importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. 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 an air inlet pre-filtering structure, which comprises a shell, wherein a first separation cavity is arranged in the shell, a dust collection cavity is arranged around the first separation cavity, a plurality of through holes communicated with the dust collection cavity are formed in the circumferential direction of the first separation cavity, an air inlet and a first air outlet are formed in the first separation cavity, and a first exhaust outlet is formed in the bottom of the dust collection cavity in a communicated manner.

Further, the air inlet pre-filtering structure also comprises a flow guide part positioned in the first separation cavity, and the flow guide part is configured to guide the air entering the first separation cavity from the air inlet to swirl along the inner wall of the first separation cavity, so that impurities in the air enter the dust collection cavity from the through holes due to centrifugal force.

Based on the above general description, an exemplary structure of the intake pre-filter structure described in the present embodiment is shown in fig. 1 and 2, the housing in the present embodiment includes a first housing 1, and the first separation chamber and the dust chamber are both disposed in the first housing 1.

The housing includes a body 102 having an opening at the top, a cover 101 closing the opening, and a cylinder 106 connected to the cover 101 to separate the first separation chamber and the dust collection chamber. In particular, structurally, as shown in fig. 3 and 4, the body 102 and the cover 101 constitute the first casing 1. The top of the cylinder 106 is open and connected to the cover 101, and the first separation chamber is defined between the cylinder 106 and the cover 101.

Meanwhile, the separation chamber is defined between the cylinder 106, the body 102 and the cover 101, wherein the dust collection chamber is arranged at the periphery and the bottom of the first separation chamber, so as to have better use effect. The first air outlet 104 is disposed on the cover 101 and extends into the first separation chamber. Here, a reinforcing plate 105 having a cross-shaped cross-section is further provided in the first air outlet 104 to improve the structural strength of the first air outlet 104.

In this embodiment, the outer wall of the first separation chamber is columnar, so that the gas entering the first separation chamber changes the flow direction to flow in a swirling manner under the action of the flow guide part. The through holes 107 are a plurality of rectangular holes provided on the outer wall of the cylinder 106. Of course, the shape of the through hole 107 can be set according to specific use requirements as long as impurities and water in the swirling flow gas can enter the dust collecting cavity due to centrifugal force and inertia, thereby realizing primary filtration of the gas.

With continued reference to fig. 3 and 4, the flow guide portion in this embodiment includes a plurality of helical blades disposed on the inner wall of the cylinder 106. In one embodiment, the vane comprises an upper vane 109 connected between the top of the cylinder 106 and the first outlet 104, and the bottom end of the upper vane 109 extends below the inlet 103. The blade in this embodiment further includes a lower blade 108 spirally disposed at the bottom of the cylinder 106 corresponding to the bottom end of the upper blade 109.

Of course, according to specific processing requirements, the upper blade 109 and the lower blade 108 of the blade in this embodiment may be integrally formed, or the number of the blades may be increased adaptively in addition to the two parts of the upper blade 109 and the lower blade 108.

As a preferred embodiment, the upper blade 109 and the lower blade 108 in this embodiment are both detachably mounted on the cylinder 106. For example, both of them are clamped on the cylinder 106, and in a specific structure, a plurality of clamping joints are arranged at intervals on the upper blade 109 and the lower blade 108, and a plurality of clamping holes are arranged on the cylinder 106 corresponding to the clamping joints. The upper blade 109 and the lower blade 108 are secured to the barrel 106 by snapping the snap connectors into snap holes.

It will be appreciated that the blades of the present embodiment may also be mounted to the barrel 106 by insertion or other removable means. Even if the upper blade 109 and the lower blade 108 are directly fixed to the cylinder 106, the flow guiding effect on the gas is not affected.

As shown in fig. 5, in the present embodiment, the gas inlet 103 is disposed above the first separation chamber, and the gas inlet direction of the gas inlet 103 is tangential to the inner wall of the first separation chamber, so that the gas flows in a swirling manner in the first separation chamber, and the present invention has a good use effect. In addition, the cross section of the air inlet 103 in this embodiment is rectangular to meet the requirement of arrangement, but the cross section of the air inlet 103 may also take other shapes according to the specific arrangement space.

When the dust collecting device is used, gas flows into the first separation cavity through the gas inlet 103, flows in a rotary mode in the first separation cavity under the guiding action of the blades, generates centrifugal force, most of impurities and water in the gas are thrown into the dust collecting cavity through the through holes 107, flows downwards along the inner wall of the dust collecting cavity and is discharged through the first sewage discharge port 110 at the bottom of the first separation cavity, and primary filtration of the gas is achieved. The clean gas flows from the bottom of the first separation chamber upwards and out of the first housing 1 via the first gas outlet 104.

The arrangement of the first gas outlet 104 and the first separation cavity in this embodiment can form a structure similar to a reactive muffler, and achieve the effect of an integrated muffler. Specifically, first outlet port 104 may be considered a resonant cavity stub and the first separation cavity may be considered a resonant cavity body. Due to the change of the acoustic impedance, a part of the sound wave is folded back at the intersection of the air inlet end of the first air outlet 104 and the first separation chamber, and is consumed and converted into heat energy, thereby being beneficial to reducing the flow noise of the gas.

The arrangement of the first separating chamber and the dust collecting chamber is also beneficial to forming the effect similar to that of a reactive muffler, and particularly, the cylinder 106 can be regarded as a short resonant cavity pipe, and the dust collecting chamber and the first separating chamber jointly form a resonant cavity body. Due to the change of acoustic impedance, a part of the sound wave is folded back at the intersection of the cylinder 106 and the dust collection cavity and is consumed and converted into heat energy, so that the noise of the engine is reduced.

In addition, the housing in this embodiment has a second separation chamber communicated with the first air outlet 104, and the bottom of the second separation chamber is provided with a second sewage outlet 205 and a second air outlet above the second sewage outlet 205. The second separation chamber is used for secondary filtration of a small part of impurities and a part of water in the gas flowing out of the first separation chamber. In addition, an outlet pipe 202 is connected to the second air outlet to deliver the twice filtered air to an air cleaner.

In detail, as shown in fig. 1, the housing in this embodiment further includes a second housing 2 covering a portion of the outer wall of the first housing 1, and the first housing 1 and the second housing 2 define the second separation chamber therebetween. The first air outlet 104 is communicated with the upper part of the second separation cavity, and the air flowing out of the first separation cavity flows into the top of the second separation cavity through the first air outlet 104, flows from top to bottom and flows out through the second air outlet.

Preferably, the cross-sectional area of the first air outlet 104 is smaller than that of the second separation chamber in this embodiment, so that the flow velocity of the air is reduced during the flowing process of the air in the second separation chamber, thereby facilitating the adhesion and accumulation of part of the impurities and water, and the impurities and water fall to the bottom of the second separation chamber and are discharged through the second sewage outlet 205.

In addition, as shown in fig. 3 and 4, a first baffle plate 203 arranged adjacent to the second air outlet is provided above the second separation chamber. In a preferred embodiment, the first baffle 203 is disposed across the second separation chamber and above the second outlet. First baffle 203 blocks impurity and water, prevents that impurity and water from directly dropping to second gas outlet department to do benefit to the filter effect who improves the second separation chamber.

In this embodiment, three sides of the first baffle 203 are connected to the inner wall of the second separation chamber, a space for gas to flow through is defined between the other side and the inner wall of the second separation chamber, and the impurities and water falling on the first baffle 203 also fall to the bottom of the second separation chamber through the space.

Of course, the first baffle 203 in this embodiment may be disposed obliquely downward toward the bottom of the second separation chamber in addition to being horizontally disposed in the second separation chamber, so that the foreign substances and water blocked on the first baffle 203 may fall downward.

Referring to fig. 3 and 4, in the present embodiment, a second baffle 204 arranged right opposite to the second air outlet is provided in the second separation chamber, and the second baffle 204 is provided extending in the height direction of the second separation chamber. The second sewage draining exit 205 and the second air outlet are respectively located at two sides of the second baffle 204 to prevent impurities and water at the bottom of the second separation chamber from flowing out of the second air outlet along with the gas.

In practical implementation, the second baffle 204 is located below the first baffle 203 and extends to the bottom of the second separation chamber along the height direction of the housing. The distance between the top end of the second baffle 204 and the bottom end of the first baffle 203 is set, so that the gas flowing from top to bottom can flow to the second gas outlet through the distance between the first baffle 203 and the second baffle 204.

Preferably, as shown in fig. 5, a projection of the first barrier 203 in the housing height direction is overlaid on a projection of the second barrier 204. This is advantageous in ensuring that the impurities and water from the first baffle 203 fall to the side of the second baffle 204 disposed toward the second soil discharge outlet 205. Not only can improve the effect of blockking impurity and water, prevent that impurity and water from entering into in the engine, but also do benefit to impurity and water and discharge through second drain 205.

In order to further improve the using effect, in the embodiment, the second housing 2 between the second sewage draining exit 205 and the second air outlet is arranged from the second air outlet obliquely downwards towards the direction of the second sewage draining exit 205. So set up, on the one hand do benefit to the impurity and the smooth flow of water to second drain 205 of second separation chamber bottom, on the other hand can also be to the impurity that receives second baffle 204 to block and flow to second drain 205.

It will be appreciated that the second housing 2 of the present embodiment may also form the second separation chamber alone, rather than defining the second separation chamber with the first housing 1, in which case secondary filtration of the gas is still possible. However, in terms of the occupied amount of the space, obviously, the occupied amount of the space is smaller by adopting the scheme that the second separation cavity is jointly defined by the second shell 2 and the first shell 1.

In order to improve the discharging effect of the foreign substances and the water, in the present embodiment, an opening and closing valve is provided on each of the first and second soil discharge ports 110 and 205, and the opening and closing valve is configured to be opened and closed in response to the pressure in the dust collection chamber. The opening and closing valve can adopt a one-way valve in the prior art. For the sake of distinction, the check valve provided on the first drain 110 is referred to as a first check valve 3, and the check valve provided on the second drain 205 is referred to as a second check valve 4.

When the engine is started and the pressure in the dust collecting cavity is negative pressure, the first one-way valve 3 and the second one-way valve 4 are kept in a closed state. When the engine is shut down and the pressure in the dust collecting chamber is positive, the first check valve 3 and the second check valve 4 are opened due to the self gravity, and impurities and water are discharged.

As another embodiment, the first check valve 3 and the second check valve 4 are connected to a controller on the vehicle, a pressure sensor is arranged in the dust collection chamber, the pressure sensor is used for detecting pressure information of the dust collection chamber and transmitting the pressure information to the controller, and the controller outputs start and stop signals to the first check valve 3 and the second check valve 4 based on the received pressure information.

Specifically, when the pressure detected by the pressure sensor is negative pressure, the controller sends a closing signal to both the first check valve 3 and the second check valve 4, and the first check valve 3 and the second check valve 4 are kept in a closed state. And when the pressure of the pressure sensor is positive, the controller sends opening signals to the first one-way valve 3 and the second one-way valve 4, and impurities and water are discharged.

It should be noted that in this embodiment, only one of the first sewage draining exit 110 and the second sewage draining exit 205 may be provided with the above-mentioned check valve, or both the open and close valves may be control valves capable of opening and closing the sewage draining exit in the prior art.

The second air outlet and the second separation cavity in the embodiment can form an effect similar to a reactive muffler, so that the flow noise of the inlet air can be reduced. Specifically, the second gas outlet can be regarded as a resonant cavity stub and the second separation cavity can be regarded as a resonant cavity body. Due to the change of the acoustic impedance, a part of the sound wave is folded back at the intersection of the second air outlet and the second separation cavity and is consumed and converted into heat energy, and therefore the noise of the engine is reduced.

In addition, in the present embodiment, a concave portion 201 may be formed in the second housing 2 in order to avoid other structures in the nacelle. As shown in fig. 1, the concave portion 201 in the present embodiment is specifically provided at the top of the second housing 2, and above the second air outlet. The concave portion 201 is simple in structure, convenient to machine and form and good in avoiding effect. Of course, the specific position of the concave portion 201 can be adjusted adaptively according to the structure to be avoided.

The pre-filter structure admits air, through first separation chamber and the dust collecting chamber that sets up in the casing to and locate the water conservancy diversion portion in first separation chamber, can make the gas that gets into in the first separation chamber carry out centrifugal motion, most impurity in the gas and part of water get into the dust collecting chamber via through-hole 107, and discharge via first drain 110, not only can improve gaseous cleanliness factor, prevent that impurity and water from getting into the engine, but also do benefit to and reduce the noise of admitting air in the casing, and have better result of use. Compared with the scheme of independently setting the silencing structure in the prior art, the silencer not only is favorable for reducing the production cost, but also is favorable for reducing the space occupation amount.

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 (10)

1. An intake air prefilter structure comprising:

the dust collector comprises a shell, wherein a first separation cavity and a dust collection cavity arranged around the first separation cavity are arranged in the shell, a plurality of through holes (107) communicated with the dust collection cavity are formed in the circumferential direction of the first separation cavity, an air inlet (103) and a first air outlet (104) are formed in the shell corresponding to the first separation cavity, and a first exhaust port (110) is formed in the bottom of the dust collection cavity;

the flow guide part is positioned in the first separation cavity and is configured to guide the gas entering the first separation cavity from the gas inlet (103) to flow along the inner wall of the first separation cavity in a swirling manner, so that impurities in the gas enter the dust collection cavity from the through hole (107) due to centrifugal force.

2. The intake air prefilter structure according to claim 1, wherein: the shell is internally provided with a second separation cavity communicated with the first air outlet (104), the bottom of the second separation cavity is communicated with a second sewage draining outlet (205), and a second air outlet positioned above the second sewage draining outlet (205).

3. The intake prefilter structure of claim 2 wherein: the shell comprises a first shell (1) and a second shell (2) covered on part of the outer wall of the first shell (1), the first separation cavity and the dust collection cavity are positioned in the first shell (1), and the second separation cavity is defined between the first shell (1) and the second shell (2).

4. The intake prefilter structure of claim 2 wherein: the first air outlet (104) is communicated with the upper part of the second separation cavity, and a first baffle (203) which is arranged adjacent to the second air outlet is arranged above the second separation cavity.

5. The intake prefilter structure of claim 2 wherein: and a second baffle (204) which is arranged right opposite to the second air outlet is arranged in the second separation cavity, and the second sewage draining outlet (205) and the second air outlet are respectively positioned at two sides of the second baffle (204).

6. The intake prefilter structure of claim 2 wherein: an opening and closing valve is arranged on the first sewage discharging port (110) and/or the second sewage discharging port (205), and the opening and closing valve is configured to be opened and closed in response to the pressure in the dust collecting cavity.

7. The intake air prefilter structure according to claim 1, wherein: the air inlet direction of the air inlet (103) is tangential to the inner wall of the first separation cavity.

8. The intake air prefilter structure according to any one of claims 1 to 7, wherein: the shell comprises a body (102) with an opening at the top, a cover body (101) for blocking the opening, and a cylinder body (106) connected to the cover body (101) to separate the first separation cavity and the dust collection cavity, wherein the first air outlet (104) is arranged on the cover body (101) and extends into the first separation cavity.

9. The intake air prefilter structure according to claim 8, wherein: the flow guide part comprises a plurality of spiral blades arranged on the inner wall of the cylinder (106).

10. The intake prefilter structure of claim 9 wherein: the blade is removably attached to the barrel (106).

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