Particle trap based on manta ray imitating structure

Abstract

The utility model discloses a particle trap based on a manta ray imitating structure, which relates to particle traps and comprises a carrier. 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, each porous medium wall surface is composed of a filtering section and a collecting section, the filtering sections are arranged close to the air inlet ends of the air inlet ducts, and the collecting sections are arranged close to the closed ends of the air inlet ducts; a cavity is formed in the filtering section, a plurality of gill rakes are arranged in the cavity, and a filtering hole is defined between every two adjacent gill rakes, so that the filtering section of the manta ray imitating structure is formed. The manta ray filtering structure is simulated, and the fluid dynamic characteristics of the DPF are optimized, so that the exhaust back pressure is reduced while the particle trapping efficiency is improved; meanwhile, the energy consumption of the engine can be reduced, and the fuel economy of the whole vehicle is improved. And the manta ray imitating filtering structure can capture fine particles smaller than traditional wall surface micropores, and the function of preventing the fine particles from escaping is achieved.

Description

Technical Field

[0001] The utility model relates to a particulate filter, and more specifically, to a particulate filter based on the structure of a manta ray gill. Background Art

[0002] With the rapid development of industrialization and urbanization, diesel engines, as one of the main power sources, have been widely used in the fields of transportation, construction machinery, agricultural machinery, etc. However, during the operation of diesel engines, a large amount of particulate matter (PM) is emitted. These particulate matters not only pollute the environment but also pose a serious threat to human health. In order to reduce the particulate matter emissions of diesel engines and meet the increasingly strict emission regulations, the technology of diesel particulate filters (DPFs) has emerged. A DPF is a device installed in the exhaust system of a diesel engine to capture particulate matter in the exhaust gas and prevent it from being emitted into the atmosphere. Traditional DPFs usually adopt a wall-flow design, and particulate matter is captured by the filter wall when passing through the DPF. Although this design can reduce particulate matter emissions to a certain extent, there is a trade-off relationship between its capture efficiency and pressure drop. In the prior art, although there are various DPF designs and optimization methods, most of them mainly focus on material selection, porosity adjustment, wall thickness optimization, etc., and insufficient consideration is given to the optimization of hydrodynamic characteristics. In addition, the designs of existing DPFs often ignore the principle of biomimetics and fail to make full use of the efficient filtration mechanisms in nature. In view of the deficiencies in the prior art, the present utility model proposes a DPF design based on the principle of bionics. Content of the Utility Model

[0003] The technical problem to be solved by the present utility model is to provide a particulate filter based on the structure of a manta ray gill in view of the deficiencies of the prior art. By mimicking the filtration structure of a manta ray gill, the hydrodynamic characteristics of the DPF are optimized, so as to improve the particulate capture efficiency while reducing the exhaust back pressure.

[0004] The particulate filter based on the structure of a manta ray gill according to the present utility model includes a carrier; a plurality of intake channels and exhaust channels are formed in the carrier, and a porous medium wall surface is provided between adjacent intake channels and exhaust channels. The porous medium wall surface is composed of a filtration section and a collection section. The filtration section is arranged near the intake end of the intake channel, and the collection section is arranged near the closed end of the intake channel; a cavity is formed in the filtration section, and a plurality of gill rakers are arranged in the cavity, and filter holes are formed between adjacent two gill rakers to form a filtration section with the structure of a manta ray gill.

[0005] For further improvement, the gill raker is composed of a gill head, a gill body and a gill tail connected in sequence; the gill head is located on one side of the filtration section close to the air inlet passage, and the gill head extends obliquely towards the exhaust passage in the direction of the collection section; the gill body is a cuboid extending obliquely downwards; the gill tail is located on one side of the filtration section close to the exhaust passage, and the gill tail extends towards the exhaust end of the exhaust passage.

[0006] Furthermore, one end of the gill head away from the gill body has a semi-circular head structure.

[0007] Furthermore, the inclination angle of the gill head is 10° - 90°.

[0008] Furthermore, the inclination angle of the gill body is greater than the inclination angles of the gill head and the gill tail.

[0009] For further improvement, the gill raker and the porous medium wall surface are of an integral structure.

[0010] For further improvement, the distance between two adjacent gill rakers is 4um - 20um.

[0011] For further improvement, the length ratio of the filtration section to the collection section is 0.5 - 1.

[0012] For further improvement, the cross-sections of both the air inlet passage and the exhaust passage are of a hexagonal structure.

[0013] For further improvement, the interiors of both the air inlet passage and the exhaust passage are of a streamlined structure.

[0014] Beneficial Effects

[0015] The advantages of the present utility model are as follows:

[0016] 1. The present utility model adopts a gill raker structure imitating the gills of a manta ray in the filtration section of the air inlet passage to achieve the dual goals of high capture efficiency and low back pressure. By imitating the filtration structure of the manta ray gills, the hydrodynamic characteristics of the DPF are optimized, thereby reducing the exhaust back pressure while improving the particle capture efficiency.

[0017] 2. The filtration structure imitating the manta ray gills can capture finer particles smaller than the traditional wall micro pores, playing a role in preventing the escape of fine particles.

[0018] 3. The filtration and collection of carbon particles in the air inlet passage adopt a segmented structure, which can effectively reduce the risk of the filter holes being blocked by carbon particles while also concentrating the carbon particles, facilitating the maintenance of the DPF. Description of the Drawings

[0019] Figure 1 It is a partial structural schematic diagram of the cross-section of the carrier of the present utility model;

[0020] Figure 2 This is a schematic diagram of the gill raker structure of the present utility model.

[0021] Wherein: 1 - carrier, 2 - air inlet passage, 3 - exhaust passage, 4 - porous medium wall, 5 - gill raker, 6 - filter hole, 41 - filtration section, 42 - collection section, 51 - gill head, 52 - gill body, 53 - gill tail. Specific embodiments

[0022] The following combines embodiments to further describe the present utility model, but does not constitute any limitation to the present utility model. Any person's limited modifications within the scope of the claims of the present utility model are still within the scope of the claims of the present utility model.

[0023] Refer to Figure 1 - Figure 2 , a particulate trap based on the gill structure of manta ray of the present utility model includes a carrier 1. Among them, the carrier 1 is made of high-strength, high-temperature resistant and corrosion-resistant materials, such as silicon carbide materials, which can effectively enhance the durability and service life of the particulate trap. A plurality of air inlet passages 2 and exhaust passages 3 are provided in the carrier 1. The interiors of the air inlet passages 2 and exhaust passages 3 are both streamlined structures, which play a role in reducing the resistance when the fluid passes through and reducing the pressure loss. In addition, the cross-sections of the air inlet passages 2 and exhaust passages 3 are both hexagonal structures to improve the space utilization rate and the air flow uniformity.

[0024] A porous medium wall 4 is provided between adjacent air inlet passages 2 and exhaust passages 3, so that the exhaust gas can enter the exhaust passage 3 from the air inlet passage 2 through the porous medium wall 4, and the carbon particles in the exhaust gas are filtered. Among them, the porous medium wall 4 is composed of a filtration section 41 and a collection section 42. The filtration section 41 is arranged near the air inlet end of the air inlet passage 2, and the collection section 42 is arranged near the closed end of the air inlet passage 2. The filtration section 41 is used to filter out the carbon particles in the exhaust gas, and then enter the collection section 42 under the blowing action of the exhaust gas for collection, thereby realizing the separation of the carbon particles in the exhaust gas.

[0025] As Figure 2 shown, a cavity is provided in the filtration section 41 of this embodiment, and a plurality of gill rakers 5 are provided in the cavity. The gill rakers 5 and the porous medium wall 4 are of an integral structure, and filter holes 6 are formed between adjacent two gill rakers 5 to constitute a filtration section 41 with the gill structure of manta ray.

[0026] In the design of DPF, high trapping efficiency is often accompanied by high backpressure, which can lead to a decline in engine performance and an increase in fuel consumption. In nature, as a marine creature, the gill structure of the manta ray is efficient and unique. It can efficiently extract tiny plankton from seawater flow and exclude the unnecessary seawater. In a traditional DPF device, particles are trapped and clog the filter mesh, requiring regular replacement or cleaning. However, the filtering mechanism of the manta ray is special. Before the water leaves the gills, it first flows through the gill rakers, passing through narrow gaps like those between dominoes, and the plankton is trapped in those gaps. Due to the ingenious angle of the gill rakers, the subsequent inflow also sweeps these trapped plankton into the manta ray's throat. Based on this, the present utility model adopts the gill raker 5 structure imitating the gill of the manta ray in the filtering section 41 to achieve the dual goals of high trapping efficiency and low backpressure. By imitating the filtering structure of the manta ray's gill, the hydrodynamic characteristics of the DPF are optimized, thereby reducing the exhaust backpressure while improving the particle trapping efficiency. This design can not only improve the performance of the DPF but also reduce the energy consumption of the engine and improve the fuel economy of the whole vehicle, which is of great significance for achieving a breakthrough in diesel engine emission control technology.

[0027] Regarding the specific application of the gill raker 5 in the DPF, the gill raker 5 of this embodiment is composed of a gill head 51, a gill body 52, and a gill tail 53 connected in sequence. Among them, the gill head 51 is located on the side of the filtering section 41 close to the intake passage 2, and the gill head 51 extends obliquely towards the exhaust passage 3 in the direction of the collection section 42, and the end away from the gill body 52 has a semi-circular head structure; the gill body 52 is a cuboid extending obliquely downwards; the gill tail 53 is located on the side of the filtering section 41 close to the exhaust passage 3, and the gill tail 53 extends towards the exhaust end of the exhaust passage 3. Among the gill head 51, the gill body 52, and the gill tail 53, the inclination angle of the gill body 52 is greater than that of the gill head 51 and the gill tail 53. With such a setting, when carbon particles enter the intake passage 2 from the intake end and impact the gill head 51, due to the semi-circular head structure of the gill head 51, the carbon particles can pass through the gill head 51 under the action of the exhaust gas flow and enter the collection section 42 along the intake passage 2, ultimately realizing that the filtering section 41 with the structure imitating the manta ray's gill can trap finer particles smaller than the traditional wall micro-holes.

[0028] In this embodiment, the distance between adjacent two gill rakers 5 is 4um - 20um, and the inclination angle of the gill head 51 is 45°. Such a design is conducive to the filtration of carbon particles and reduces the risk of them entering the filter holes 6.

[0029] The length ratio of the filtering section 41 to the collection section 42 is 0.5 - 1.

[0030] The above are only the preferred embodiments of the present utility model. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several modifications and improvements can be made, and these will not affect the implementation effect of the present utility model and the practicality of the patent.

Claims

1. A particulate trap based on the structure of a manta ray gill, characterized in that, It includes a carrier (1); a plurality of air inlet channels (2) and exhaust channels (3) are formed in the carrier (1), and a porous medium wall (4) is provided between adjacent air inlet channels (2) and exhaust channels (3). The porous medium wall (4) is composed of a filtering section (41) and a collecting section (42). The filtering section (41) is arranged near the air inlet end of the air inlet channel (2), and the collecting section (42) is arranged near the closed end of the air inlet channel (2); a cavity is formed in the filtering section (41), and a plurality of gill rakers (5) are arranged in the cavity, and filter holes (6) are formed between adjacent gill rakers (5) to form a filtering section (41) with a manta ray gill structure.

2. The particulate trap based on the manta ray gill structure according to claim 1, wherein The gill raker (5) is composed of a gill head (51), a gill body (52) and a gill tail (53) connected in sequence; the gill head (51) is located on the side of the filtering section (41) close to the air inlet channel (2), and the gill head (51) extends obliquely towards the exhaust channel (3) in the direction of the collecting section (42); the gill body (52) is a cuboid extending obliquely downwards; the gill tail (53) is located on the side of the filtering section (41) close to the exhaust channel (3), and the gill tail (53) extends in the direction of the exhaust end of the exhaust channel (3).

3. The particulate trap based on the manta ray gill structure according to claim 2, wherein One end of the gill head (51) far from the gill body (52) has a semi-circular head structure.

4. The particulate trap based on the manta ray gill structure according to claim 2, wherein, The inclination angle of the gill head (51) is 10°-90°.

5. The particulate trap based on the manta ray gill structure according to claim 2, wherein, The inclination angle of the gill body (52) is greater than the inclination angles of the gill head (51) and the gill tail (53).

6. A particulate trap based on the structure of a manta ray gill according to any one of claims 1-5, characterized in that, The gill raker (5) and the porous medium wall (4) are of an integral structure.

7. The particulate trap based on the manta ray gill structure according to claim 1, characterized in that, The distance between adjacent gill rakers (5) is 4um-20um.

8. The particulate trap based on the manta ray gill structure according to claim 1, wherein, The length ratio of the filtering section (41) to the collecting section (42) is 0.5-1.

9. A particulate trap based on the structure of a manta ray gill according to claim 1, characterized in that, The cross-sections of the air inlet channel (2) and the exhaust channel (3) are both hexagonal structures.

10. A particulate trap based on the structure of a manta ray gill according to claim 1 or 9, characterized in that, The interiors of the air inlet channel (2) and the exhaust channel (3) are both streamlined structures.

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