Particle trap based on shark skin structure

Abstract

The invention discloses a particle trap based on a shark skin structure, and relates to particle traps. A plurality of air inlet ducts and air outlet ducts are formed in the carrier, porous medium wall surfaces are arranged between the adjacent air inlet ducts and air outlet ducts, and a plurality of shark skin odontoid imitating placoid scale structures are arranged on the hole walls of the air inlet ducts. By simulating a streamline structure of shark skin, a shark skin odontoid imitating placoid scale structure is designed in the air inlet duct, and the placoid scale structure can destroy a boundary layer and delay flow separation, so that differential pressure resistance is reduced, the effect of optimizing a flow path of airflow is achieved, and exhaust back pressure is effectively reduced.

Description

Technical Field

[0001] The present invention relates to a particle trap, and more particularly, to a particle trap based on a shark skin structure. Background Art

[0002] In the field of diesel engine emission control technology, diesel particulate filter (DPF) has received extensive attention in recent years as a key technology to reduce diesel engine particulate matter emissions. The existing DPF is effective in capturing particulate matter, but under high engine load conditions, its increased back pressure will lead to reduced fuel economy and reduced power performance. In particular, in the traditional DPF design, although the wall-flow honeycomb ceramic structure can effectively capture particulate matter, its back pressure problem is still prominent. Therefore, this problem needs to be solved urgently. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a particle collector based on a shark skin structure in view of the deficiencies in the prior art, thereby effectively reducing the exhaust back pressure.

[0004] The particle collector based on shark skin structure described in the present invention comprises a carrier; a plurality of air inlet channels and exhaust channels are provided in the carrier, a porous medium wall is provided between adjacent air inlet channels and exhaust channels, and a plurality of shield scale structures imitating shark skin denticles are provided on the hole walls of the air inlet channels.

[0005] As a further improvement, a plurality of the shield scale structures are arranged into a shield scale group extending from one end of the air inlet channel to the other end thereof, and a plurality of shield scale groups are evenly arranged on the hole wall of the air inlet channel.

[0006] Furthermore, an intermediate flow channel is provided between two adjacent shield scale groups.

[0007] Furthermore, the width of the middle flow channel is 0.15-0.7 mm.

[0008] As a further improvement, the carrier is made of ceramic material, and the surface of the carrier and the surface of the shield-scale structure are coated with a hydrophobic coating.

[0009] As a further improvement, the shield scale structure includes a middle scale and side scales; a plurality of side scales are provided on both sides of the middle scale, and fluid channels are provided between the middle scale and the adjacent side scales and between two adjacent side scales, and the direction of the fluid channel is consistent with the direction of the air inlet channel.

[0010] Furthermore, the width of the fluid channel is 0.07-0.14 mm.

[0011] Furthermore, the length of the middle scale is greater than that of the side scales, and the length of the side scales decreases starting from the middle scale.

[0012] Furthermore, the protrusion height of the middle scale is greater than the protrusion height of the side scale, and the protrusion height of the middle scale is 0.1 to 0.35 mm.

[0013] Furthermore, the thickness of the middle scales and the side scales is consistent, and the thickness is 0.1 to 0.35 mm.

[0014] Beneficial Effects

[0015] The advantages of the present invention are:

[0016] 1. The present invention imitates the streamlined structure of shark skin and designs a shield scale structure imitating the denticles of shark skin in the air intake duct. The shield scale structure can destroy the boundary layer, delay flow separation, and thus reduce the pressure difference resistance, thereby optimizing the flow path of the airflow and effectively reducing the exhaust back pressure.

[0017] 2. The surface of the carrier and the surface of the shield scale structure are coated with a hydrophobic coating, which can reduce the adhesion of particulate matter and reduce the maintenance requirements of DPF. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the internal structure of the side of the air intake and exhaust duct of the present invention;

[0019] Figure 2 It is a schematic diagram of the shield scale structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the air intake channel of the present invention.

[0021] Among them: 1-carrier, 2-inlet channel, 3-exhaust channel, 4-porous medium wall, 5-shield scale structure, 6-middle flow channel, 51-middle scale, 52-side scale, 53-fluid channel. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0023] See also Figure 1-Figure 3 The particle collector based on shark skin structure of the present invention comprises a carrier 1. A plurality of air inlet channels 2 and air outlet channels 3 are provided in the carrier 1, a porous medium wall 4 is provided between adjacent air inlet channels 2 and air outlet channels 3, and a plurality of shield scale structures 5 imitating shark skin denticles are provided on the hole wall of the air inlet channel 2.

[0024] Studies have shown that the denticles of shark skin can effectively reduce water resistance, and its design is based on the formation of different shapes according to the swimming speed and the needs of different parts of the body. When cruising at low speed, the higher middle ridge can effectively reduce resistance, while when hunting at high speed, the lower side ridges play a key role in reducing drag. The design concept of this streamlined structure can be applied to the optimization of DPF to reduce its back pressure during operation. Therefore, the present invention imitates the streamlined structure of shark skin and designs a shield scale structure 5 that imitates the denticles of shark skin in the air intake duct 2, so that a more complex fluid channel can be designed inside the DPF to optimize the flow path of the airflow, thereby reducing the increase in back pressure. This design can not only improve the capture efficiency of particulate matter, but also maintain a low exhaust back pressure under high load conditions, thereby improving the fuel economy and power performance of the diesel engine. In summary, the DPF design based on the streamlined structure of shark skin can not only effectively reduce back pressure, but also improve particle capture efficiency, providing a new direction for the innovation of diesel engine emission control technology. The application of this design concept heralds further development and optimization of DPF technology in the future, helping to meet increasingly stringent emission standards.

[0025] Regarding the specific design requirements of the shield scale structure 5, the multiple shield scale structures 5 of the present invention are arranged into a shield scale group extending from one end of the air inlet channel 2 to the other end thereof, and multiple shield scale groups are evenly arranged on the hole wall of the air inlet channel 2. Taking the square air inlet channel 2 as an example, two shield scale groups are arranged on each side wall of the air inlet channel 2, so that the interior of the entire air inlet channel 2 is a streamlined channel structure that imitates the tooth process of shark skin, optimizes gas flow, and reduces turbulence and eddy currents.

[0026] An intermediate flow channel 6 is provided between two adjacent shield scale groups, and its width is preferably 0.5 mm. The width of the intermediate flow channel 6 is greater than the spacing between the scales, and it serves as the main area for gas to pass through the porous medium wall 4, ensuring the reliability of gas entering the exhaust channel 3 from the inlet channel 2.

[0027] In this embodiment, the carrier 1 is made of ceramic material, and the surface of the carrier 1 and the surface of the shield scale structure 5 are coated with a hydrophobic coating, which can reduce the adhesion of particulate matter and reduce the maintenance requirements of the DPF.

[0028] Regarding the shield scale structure 5, it includes a middle scale 51 and side scales 52. Multiple side scales 52 are provided on both sides of the middle scale 51, and a fluid channel 53 is provided between the middle scale 51 and the side scales 52 adjacent thereto and between two adjacent side scales 52. The direction of the fluid channel 53 is consistent with the direction of the air intake duct 2, which plays a role in optimizing the flow path of the airflow. The length of the middle scale 51 is greater than the length of the side scales 52, and the length of the side scales 52 decreases from the beginning close to the middle scale 51. Specifically, the width of the fluid channel 53 is preferably 0.1mm. The protrusion height of the middle scale 51 is slightly greater than the protrusion height of the side scales 52, and the protrusion height of the middle scale 51 is preferably 0.2mm. The thickness of the middle scale 51 and the side scales 52 is consistent, and the thickness is preferably 0.2mm. Through the above design, a tiny tooth-like structure imitating a shark tooth is formed on the side wall of the air intake duct 2.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A particle collector based on shark skin structure, characterized in that: The invention comprises a carrier (1); a plurality of air inlet channels (2) and air outlet channels (3) are provided in the carrier (1); a porous medium wall surface (4) is provided between adjacent air inlet channels (2) and air outlet channels (3); and a plurality of shield scale structures (5) imitating the tooth processes of shark skin are provided on the hole walls of the air inlet channels (2).

2. The particle collector based on shark skin structure according to claim 1, characterized in that: The plurality of shield scale structures (5) are arranged to form a shield scale group extending from one end of the air inlet channel (2) to the other end thereof, and the plurality of shield scale groups are evenly arranged on the hole wall of the air inlet channel (2).

3. The particle collector based on shark skin structure according to claim 2, characterized in that: An intermediate flow channel (6) is provided between two adjacent shield scale groups.

4. The particle collector based on shark skin structure according to claim 3, characterized in that: The width of the intermediate flow channel (6) is 0.15-0.7 mm.

5. The particle collector based on shark skin structure according to claim 1, characterized in that: The carrier (1) is made of ceramic material, and the surface of the carrier (1) and the surface of the shield-scale structure (5) are coated with a hydrophobic coating.

6. A particle collector based on a shark skin structure according to any one of claims 1 to 5, characterized in that: The shield scale structure (5) comprises a middle scale (51) and side scales (52); a plurality of side scales (52) are provided on both sides of the middle scale (51); and a fluid channel (53) is provided between the middle scale (51) and the side scale (52) adjacent thereto, and between two adjacent side scales (52); the direction of the fluid channel (53) is consistent with the direction of the air intake channel (2).

7. The particle collector based on shark skin structure according to claim 6, characterized in that: The width of the fluid channel (53) is 0.07-0.14 mm.

8. The particle collector based on shark skin structure according to claim 6, characterized in that: The length of the middle scale (51) is greater than the length of the side scale (52), and the length of the side scale (52) decreases sequentially starting from the middle scale (51).

9. The particle collector based on shark skin structure according to claim 6, characterized in that: The protrusion height of the middle scale (51) is greater than the protrusion height of the side scale (52), and the protrusion height of the middle scale (51) is 0.1 to 0.35 mm.

10. The particle collector based on shark skin structure according to claim 6, characterized in that: The thickness of the middle scale (51) and the side scale (52) is consistent, and the thickness is 0.1 to 0.35 mm.

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