Particle trap based on honeycomb structure

Abstract

The utility model discloses a particle trap based on a honeycomb structure, which relates to particle traps and comprises a carrier. A plurality of air inlet duct groups and exhaust duct groups which are sequentially and alternately arranged around the center position of the carrier are arranged in the carrier, each air inlet duct group is composed of a plurality of air inlet ducts, and each air inlet duct is of a honeycomb-shaped hexagonal structure; the exhaust duct set is composed of a plurality of exhaust ducts, and the exhaust ducts are of a honeycomb-shaped hexagonal structure. And porous medium wall surfaces are arranged between the air inlet ducts and the exhaust ducts in the adjacent air inlet duct group and the exhaust duct group. By simulating the honeycomb hexagonal structure, the hydrodynamic characteristics are optimized, the back pressure is reduced, the particulate trapping efficiency is improved, the emission of particulate matters of a diesel engine is reduced, and positive significance is achieved for environmental protection.

Description

Technical Field

[0001] The utility model relates to a particulate filter, and more specifically, to a particulate filter based on a honeycomb structure. Background Art

[0002] With the increasing global awareness of environmental protection, the diesel engine emission standards have become increasingly strict. As an effective particulate matter emission control technology, the diesel particulate filter (DPF) has been widely used in the post-treatment system of diesel engine emissions. The main function of the DPF is to capture the particulate matter in the diesel engine emissions and burn it off through a periodic regeneration process, thereby reducing environmental pollution. However, the existing DPF technology has certain limitations under high-load conditions, especially in the design of square intake channels, often resulting in a relatively high back pressure due to unreasonable structure, which not only affects the performance of the engine but also increases energy consumption. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a particulate filter based on a honeycomb structure in view of the deficiencies of the prior art. By imitating the hexagonal structure of the honeycomb, the hydrodynamic characteristics are optimized, the back pressure is reduced, and the particulate capture efficiency is improved.

[0004] A particulate filter based on a honeycomb structure according to the utility model includes a carrier; a plurality of intake channel groups and exhaust channel groups are alternately arranged around the central position of the carrier in sequence. The intake channel group is composed of a plurality of intake channels, and the intake channels are in a honeycomb-shaped hexagonal structure; the exhaust channel group is composed of a plurality of exhaust channels, and the exhaust channels are in a honeycomb-shaped hexagonal structure; a porous medium wall surface is provided between the intake channels and the exhaust channels in adjacent intake channel groups and exhaust channel groups.

[0005] As a further improvement, the interiors of the intake channels and the exhaust channels are both in a streamlined structure.

[0006] As a further improvement, a plurality of filter holes are provided in the porous medium wall surface. The two ends of the filter holes are respectively communicated with the intake channels and the exhaust channels, and the filter holes are inclined.

[0007] Furthermore, the inclination direction of the filter holes is the same as the intake direction of the intake channels.

[0008] Even further, the inclination angle of the filter holes is 10° to 90°.

[0009] As a further improvement, the thickness of the porous medium wall surface is 0.3 mm to 0.36 mm.

[0010] For further improvement, the intake end of the intake duct and the exhaust end of the exhaust duct are respectively located at both ends of the carrier.

[0011] For further improvement, an exhaust duct is provided at the central position of the carrier.

[0012] For further improvement, the carrier is made of silicon carbide material.

[0013] Beneficial effects

[0014] The advantages of the present utility model are as follows:

[0015] 1. The ducts of the particulate trap are designed with a honeycomb hexagonal structure, effectively reducing the back pressure of the particulate trap and reducing energy consumption.

[0016] 2. The filter holes of the porous medium wall are arranged in an inclined manner, and the inclined direction of the filter holes is the same as the intake direction of the intake duct. In this way, it is beneficial for the tail gas in the intake duct to enter the exhaust duct more smoothly, reducing the tail pressure at the closed end of the intake duct. And from the exhaust direction of the exhaust duct, the filtered tail gas is also discharged along the opening side of the exhaust duct, which is also beneficial for exhaust. Description of the drawings

[0017] Figure 1 It is a schematic cross-sectional structure diagram of the particulate trap of the present utility model. The filled part in the figure indicates the intake duct;

[0018] Figure 2 It is a schematic three-dimensional structure diagram of the intake / exhaust ducts of the present utility model;

[0019] Figure 3 It is a schematic axial sectional structure diagram of the intake / exhaust ducts of the present utility model.

[0020] Among them: 1 - carrier, 2 - intake duct, 3 - exhaust duct, 4 - porous medium wall, 5 - filter hole. Specific embodiments

[0021] The following combines examples to further describe the present utility model, but does not constitute any limitation to the present utility model. Any limited modifications made by anyone within the scope of the claims of the present utility model are still within the scope of the claims of the present utility model.

[0022] Refer to Figures 1 - 3, A particulate trap based on a honeycomb structure of the present utility model includes a carrier 1. Among them, the carrier 1 is made of a material with high strength, high temperature resistance, and corrosion resistance, such as silicon carbide material, which can effectively enhance the durability and service life of the particulate trap. An exhaust duct 3 is provided at the central position of the carrier 1. In the carrier 1, with this exhaust duct 3 as the center, a plurality of intake duct groups and exhaust duct groups that are alternately arranged in sequence around this exhaust duct 3 are provided. For example, taking this exhaust duct 3 as the 0th layer, its periphery is the first layer, which is an intake duct group, the second layer is an exhaust duct group, the third layer is an intake duct group, and so on. In this way, an alternately arranged intake / exhaust duct group is formed. And the intake duct group of this embodiment is composed of a plurality of intake ducts 2, and the intake ducts 2 are in a honeycomb-shaped hexagonal structure; the exhaust duct group is composed of a plurality of exhaust ducts 3, and the exhaust ducts 3 are in a honeycomb-shaped hexagonal structure. That is, the cross-section of each duct is hexagonal to improve the space utilization rate and air flow uniformity. The interiors of the intake ducts 2 and the exhaust ducts 3 are both in a streamlined structure.

[0023] In nature, the honeycomb structure is famous for its high space utilization rate and excellent mechanical properties. The hexagonal honeycomb structure built by bees is not only extremely economical in material use, but also achieves the best effect in structural stability and space utilization. The efficiency of this structure has inspired people's research on the application of the honeycomb structure in the industrial field. For example, the application of the honeycomb sandwich structure in fields such as aerospace, architecture, and automotive manufacturing has shown its advantages in lightweight, high strength, and high stiffness. Especially in fluid dynamics, the natural streamlined design of the honeycomb structure can effectively reduce the resistance of fluid flow and improve the fluid exchange efficiency. To solve the problems in the prior art, the present invention proposes a novel design of the intake / exhaust ducts of a particulate trap based on the bionic honeycomb hexagonal structure. This design optimizes the fluid dynamics characteristics, reduces the back pressure, and improves the particulate trapping efficiency by imitating the natural streamlined structure of the honeycomb.

[0024] In addition, a porous medium wall 4 is provided between the intake ducts 2 and the exhaust ducts 3 in adjacent intake duct groups and exhaust duct groups, so that the exhaust gas can be filtered from the intake ducts 2 to the exhaust ducts 3, and under the filtering action of the filter holes 5, the carbon particles filtered out will remain in the intake ducts 2. The intake ends of the intake ducts 2 and the exhaust ends of the exhaust ducts 3 are respectively located at both ends of the carrier 1, and the other ends are closed, so that the exhaust gas must pass through the filtering of the porous medium wall 4.

[0025] Specifically, a plurality of filter holes 5 are formed in the porous medium wall surface 4. Both ends of the filter holes 5 are respectively communicated with the intake passage 2 and the exhaust passage 3. The filter holes 5 are used for filtering carbon particles in the exhaust gas. The filter holes 5 are inclined, and the inclination direction of the filter holes 5 is the same as the intake direction of the intake passage 2. This is beneficial to making the exhaust gas in the intake passage 2 enter the exhaust passage 3 more smoothly and reducing the exhaust gas pressure at the closed end of the intake passage 2. And from the perspective of the exhaust direction of the exhaust passage 3, the filtered exhaust gas is also discharged along the opening side of the exhaust passage 3, which is also beneficial to exhaust. More specifically, the inclination angle of the filter holes 5 is 10° to 90°, preferably 45°. The thickness of the porous medium wall surface 4 is 0.3 mm to 0.36 mm.

[0026] In this embodiment, the pores inside the carrier 1 can be formed by high-precision die casting technology or by laser engraving technology. In this embodiment, a honeycomb hexagonal texture, that is, pores, is formed on the filter wall surface of the particulate trap by laser engraving technology. The filter holes 5 are also formed in the same way.

[0027] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. A particulate trap based on a honeycomb structure, characterized in that, It includes a carrier (1); multiple intake duct groups and exhaust duct groups are arranged in the carrier (1) alternately in sequence around its central position. The intake duct group is composed of multiple intake ducts (2), and the intake ducts (2) are in a honeycomb hexagonal structure; the exhaust duct group is composed of multiple exhaust ducts (3), and the exhaust ducts (3) are in a honeycomb hexagonal structure; a porous medium wall (4) is provided between the intake ducts (2) and the exhaust ducts (3) in adjacent intake duct groups and exhaust duct groups.

2. The particulate trap based on a honeycomb structure according to claim 1, wherein The interiors of the intake ducts (2) and the exhaust ducts (3) are both in a streamlined structure.

3. The particulate trap based on a honeycomb structure according to claim 1, characterized in that, Multiple filter holes (5) are formed in the porous medium wall (4). Two ends of the filter holes (5) are respectively communicated with the intake ducts (2) and the exhaust ducts (3), and the filter holes (5) are inclined.

4. A particulate trap based on a honeycomb structure according to claim 3, wherein, The inclination direction of the filter holes (5) is the same as the intake direction of the intake ducts (2).

5. A particulate trap based on a honeycomb structure according to claim 4, wherein The inclination angle of the filter holes (5) is 10° to 90°.

6. The particulate trap based on a honeycomb structure according to claim 1 or 3, characterized in that, The thickness of the porous medium wall (4) is 0.3 mm to 0.36 mm.

7. A particulate trap based on a honeycomb structure according to claim 1, characterized in that, The intake ends of the intake ducts (2) and the exhaust ends of the exhaust ducts (3) are respectively located at both ends of the carrier (1).

8. A particulate trap based on a honeycomb structure according to claim 1, wherein, An exhaust duct (3) is provided at the central position of the carrier (1).

9. The particulate trap based on a honeycomb structure according to claim 1, wherein, The carrier (1) is made of silicon carbide material.

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