High-strength post-processing metal carrier unit

Abstract

The invention relates to a high-strength post-processing metal carrier unit, which is characterized in that wire meshes, sintering felts or steam and liquid filter screens are taken as the base bodies; ropes formed by twisting the steam and liquid filter screens are shaped as the sine with certain diameters distributed on the two sides of a central axis along the length direction; and the vehicle high-strength post-processing metal carrier unit is manufactured by winding from one end; in this way, radial support is provided between layers of the wire meshes, the sintering felts and the steam and liquid filter screens, multiple uniform wedge-shaped cushion spaces are distributed at both the inlet end and the outlet end, and the replacement and maintenance interval is prolonged on the premise of not reducing the filtering effect; therefore, as the post-processing carrier, the product can be used as the carrier for DOC (diesel oxidation catalyst), POC (particle oxidation catalyst), DPF (diesel particle filter) and SCR (selective catalytic reduction), and has certain practical significance and higher practical value.

Description

technical field [0001] The invention relates to a high-strength post-treatment metal carrier unit, which is applied to the DOC, SCR, DPF or POC post-treatment industry of automobile exhaust. Background technique [0002] At present, the world is facing comprehensive challenges of energy and environment. In the selection of technical means to meet the emission standards of traditional vehicles, people still face many difficulties, for example, how to choose the carrier and catalyst for post-treatment. [0003] The post-processing carrier is the key factor to constitute the vehicle after-processing platform. Up to now, most of the post-processing carriers are imported ceramic carriers. Similarly, some mature metal carriers with special structures are also monopolized by foreign technologies and patents, which has become a key factor restricting the development of China's post-processing industry. [0004] Therefore, how to obtain low-cost and high-performance post-processing...

AI Technical Summary

Problems solved by technology

[0006] The ceramic carrier used in post-processing usually uses a special cermet 3M gasket to 'include' the carrier, and fix the carrier and the shell package together to meet the anti-vibration requirements of the vehicle's cold and hot states, but , on the one hand, the cost of materials is high, on the other hand, the packaging must use robot production lines, which affects the competitiveness of products

[0007] However, the metal carrier unit used above is not suitable for using the 3M gasket of this metal ceramic when packaging.

Here, it is not to say that there is no problem with the packaging of the metal carrier. On the contrary, various technical measures must be taken to meet the anti-vibration requirements of the cold and hot states of the vehicle; for example, the columnar metal carrier can be integrated The brazing process is carried out in a vacuum brazing furnace. Although this process can well solve the strength problem of the carrier unit, the cost of equipment and production process is high, and it is completely inconsistent with the green process of low-carbon energy saving and environmental protection. Features: It is also possible to install support structures at both ends of the columnar metal carrier, or to 'cross the ribs' between the columnar metal carriers, etc. These measures have changed the most basic airflow field of the carrier The uniformity of the distribution, the result is 'local uneven force', which will cause damage in the form of displacement and other forms when passing the GB or HJ vibration test

[0008] Similarly, metal carriers with various wire mesh structures have appeared on the market. However, there are different degrees of clogging problems in this kind of samples in the prescribed 500~1000h bench aging test. The back pressure index of the measured samples The detection is greater than 15kpa, and the highest is 23kpa. When the back pressure is high, the fuel economy of the vehicle will deteriorate. The reason for these clogging problems comes down to the macroscopic results of this type of carrier and the optimization of the microstructure. The air flow channel should be optimized while the area (filter bed volume) is used;

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