KR100822447B1 - Filter assembly for the particulate matter eliminated inserted sealing mat - Google Patents

Abstract

A filter assembly for a diesel particulate filter with a sealing mat is provided to prevent degradation of sealing performance by using the sealing mat of a metal wire mesh type having superior heat resistance and durability. A filter assembly for a diesel particulate filter includes an inlet port(51), a porous tube(50), a metal foam filter(40), a front flange(10), a rear flange(20), a sealing mat(30), and a jacket(60). The inlet port permits exhaust gas from an engine to flow therein. The porous tube permits exhaust gas to be discharged after passing through the filter. The metal foam filter is arranged to allow passage of exhaust gas introduced into the porous tube, and stacked or rolled to surround the porous tube. The front flange is fixed at a front end of the metal foam filter, and holds the porous tube in place and prevents the filter from being pushed in a forward direction. The rear flange is fixed at a rear end of the metal foam filter, and holds the porous tube in place and prevents the filter from being pushed in a backward direction. The sealing mat is a metal wire mesh type having a coefficient of thermal expansion similar to that of a metal foam. The sealing mat is interposed between the front flange and the metal foam filter and between the rear flange and the metal foam filter. The jacket is interposed between the front flange and the rear flange, and has a mesh shape for keeping the shape of the metal foam filter. The metal foam filter is surrounded by the jacket.

Description

Filter assembly for the particulate matter eliminated inserted sealing mat

1 is a schematic cross-sectional view of the sealing mat is mounted on the filter assembly for a smoke reduction device according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing a cross-section of the filter assembly for the smoke reduction device is equipped with a sealing mat according to an embodiment of the present invention.

Figure 3 is a view showing a separate configuration of the filter assembly for the smoke reduction device is equipped with a sealing mat according to an embodiment of the present invention.

Figure 4 is a perspective view showing the shape of the sealing mat of the metal wire mesh form mounted on the filter assembly for a smoke reduction device according to an embodiment of the present invention.

Figure 5 is a perspective view showing the shape of the metal foam filter of the stacked type mounted on the filter assembly for a smoke reduction device according to an embodiment of the present invention.

Figure 6 is a perspective view showing the shape of the rolling metal foam filter mounted on the filter assembly for a smoke reduction device according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10 ... Front Flange 20 ... Rear Flange

30 ... sealing mat 40 ... metal foam filter

50 ... porous tube 51 ... inlet

53.Air passage 60 ... Jacket

The present invention relates to a filter assembly for a smoke reduction device equipped with a sealing mat, and more particularly, a metal wire having a coefficient of thermal expansion similar to that of a metal foam between the front flange and the metal foam filter and between the rear flange and the metal foam filter, respectively. By inserting mesh-type sealing mat, it is possible to effectively prevent leakage of exhaust gas generated by long-term use of diesel particulate filter (DPF), which improves performance, and improves heat resistance and durability. By using a metal wire mesh-type sealing mat, it is possible to prevent the sealing effect of long time use from being lowered, and the performance is excellent. By using a metal wire mesh-type sealing mat, welding can be performed, and a metal It is possible to prevent the preservation of the form of the foam filter and to prevent leakage. Since heat and cooling are repeated, thermal shock and durability problems occur, but the sealing mat is excellent in durability, and thus, a filter assembly for a smoke reduction device equipped with a sealing mat that can maintain a constant flow path even if exhaust gas passes for a long time.

Conventionally, a ceramic seal has been used as a sealing material of the smoke reduction device. In the case of the ceramic seal has the advantage of easy deformation in the nature of the material and excellent workability. However, when the ceramic seal is used in a soot reduction apparatus, periodic heating and cooling, as well as severe thermal shock, causes problems in durability.

In addition, the high temperature exhaust gas enters the smoke reduction device and is discharged out through the filter. In this process, the high temperature of the exhaust gas is transmitted to each component of the smoke reduction device, and the conventional sealing mat is periodically There is a problem that the heating and cooling as well as broken or burned away by heat shock.

Therefore, it is possible to effectively prevent the leakage of the exhaust gas generated by the long-term use of the smoke reduction device DPF, to prevent the deterioration of the sealing effect due to long-term use, and to preserve the shape of the metal foam filter and the DPF device due to the leakage It is possible to reduce the concentration of particulate matter in the exhaust gas, which is a role of the exhaust gas, and to reduce the concentration of particulate matter in the exhaust gas, and to prevent the damage of the sealing mat caused by thermal shock and durability problems. There is an urgent need for the development of a filter assembly for a smoke reduction device equipped with a sealing mat that can maintain a constant.

Accordingly, the present invention has been conceived to solve the above problems, a metal wire mesh sealing mat having a similar coefficient of thermal expansion coefficient and metal foam between the front flange and the metal foam filter, and between the rear flange and the metal foam filter, respectively. By inserting, it provides a filter assembly for a smoke reduction device equipped with a sealing mat that can effectively prevent leakage of exhaust gas generated by long-term use of the diesel particulate reduction filter (DPF), which improves performance. The purpose is.

Another object of the present invention is to reduce the sealing effect of long time use by using a metal mat of heat-resistant and durable metal wire mesh, so that the smoke reduction device equipped with a sealing mat excellent in performance To provide a filter assembly for.

Another object of the present invention is to provide a filter assembly for a smoke reduction device equipped with a sealing mat which can be welded and prevents leakage and preservation of the shape of the metal foam filter by using a sealing mat in the form of a metal wire mesh. To provide.

In addition, another object of the present invention is to regenerate the characteristics of the soot reduction device because the periodic heating and cooling is repeated, so that the heat shock and durability problems occur, but the sealing mat is excellent in durability, even if the exhaust gas passes for a long time to maintain a constant flow path To provide a filter assembly for a smoke reduction device equipped with a sealing mat.

Filter assembly for a smoke reduction device equipped with a sealing mat according to a preferred embodiment of the present invention for achieving the above object is discharged through the filter after the inlet and the exhaust gas is introduced, the exhaust gas flows in A porous tube; A metal foam filter through which the exhaust gas introduced into the porous tube passes and surrounds the porous tube in a stacked or rolled form; A front flange fixed vertically to the front end of the metal foam filter to fix the porous tube and prevent the filter from being pushed forward; A rear flange fixed perpendicularly to the rear end of the metal foam filter to fix the porous tube and prevent the filter from being pushed to the rear end; A sealing mat inserted between the front flange and the metal foam filter and between the rear flange and the metal foam filter, the sealing mat having a metal wire mesh shape similar to that of the metal foam; A jacket mounted between the front flange and the rear flange, the jacket surrounding the metal foam filter being formed in the shape of a mesh to maintain the shape of the metal foam filter in its original state and have durability; Characterized in that it comprises a.

In the present invention, the sealing mat inserted between the front flange and the metal foam filter, and between the rear flange and the metal foam filter is welded and fixed to prevent the degradation of the sealing effect of long time use.

In the present invention, the porous tube is formed with a plurality of polygonal air passages, characterized in that the metal material.

In the present invention, the metal foam filter is characterized in that it is alloyed by the addition of chromium and iron to the nickel base.

Looking at the preferred embodiment of the present invention together with the accompanying drawings as follows, when it is determined that the detailed description of the known art or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention The description will be omitted, and the following terms are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator, and the definition is for the smoke reduction device equipped with the sealing mat of the present invention. It should be made based on the content throughout this specification describing the filter assembly.

1 is a schematic cross-sectional view in which a sealing mat is mounted on a filter assembly for a smoke reduction device according to an embodiment of the present invention, and FIG. 2 is a filter assembly for a smoke reduction device equipped with a sealing mat according to an embodiment of the present invention. 3 is a cross-sectional view showing a cross-sectional view of FIG. 3 is a view showing a separated configuration of the filter assembly for a smoke reduction device is equipped with a sealing mat according to an embodiment of the present invention, Figure 4 is a smoke according to an embodiment of the present invention 5 is a perspective view illustrating a shape of a sealing mat of a metal wire mesh type mounted on a filter assembly for a reduction device, and FIG. 5 is a shape of a metal foam filter of a stacked type mounted on a filter assembly for a smoke reduction device according to an embodiment of the present invention. 6 is a perspective view illustrating a shape of a rolling metal foam filter mounted to a filter assembly for a smoke reduction device according to an exemplary embodiment of the present invention. Perspective view.

As shown in Figures 1 to 6, the filter assembly for a smoke reduction device equipped with a sealing mat is discharged through the filter after the inlet 51 and the exhaust gas flows into the inlet 51, A porous tube 50; A metal foam filter 40 through which the exhaust gas introduced into the porous tube passes and surrounds the porous tube in a stacked or rolled form; A front flange (10) fixed vertically to the front end of the metal foam filter to prevent the fixing of the porous tube and the filter from being pushed forward; A rear flange 20 fixed vertically to the rear end of the metal foam filter to prevent the fixing of the porous tube and the filter from being pushed to the rear end; A sealing mat (30) inserted between the front flange and the metal foam filter and between the rear flange and the metal foam filter, the metal wire mesh having a thermal expansion coefficient similar to that of the metal foam; A jacket (60) mounted between the front flange and the rear flange, the jacket (60) surrounding the metal foam filter formed in the shape of a mesh to maintain the shape of the metal foam filter in its original state and have durability; It is provided.

Looking at the function of the main technical means of the filter assembly for a smoke reduction device equipped with a sealing mat according to an embodiment of the present invention with reference to the bar shown in Figs.

The porous tube 50 is an inlet 51 through which the exhaust gas combusted from the engine flows in, and is discharged through the filter after the exhaust gas flows in. The porous tube 50 has a plurality of polygonal air passages 53 are formed of a metal material.

The metal foam filter 40 passes through the exhaust gas introduced into the porous tube 50, and surrounds the porous tube in a stacked or rolling form. The metal foam filter 40 is mounted in a form of stacking or rolling a plurality of vertically in order to increase the effective contact area and lengthen the length of the exhaust gas passes in a given space. As shown in FIGS. 5 and 6, the metal foam filter 40 configured in the jacket 60 includes a stacked type or a rolling type. The stacked type has a through hole 43 in the center of a nickel foam. After processing, the structure of the pressurized canning layer is pressed by the pressing method, and the rolling method shows the structure of rolling the nickel alloy foam on the holder 44. The porosity of the surface and the side of the conventional metal alloy is almost the same, but the pore size of the side is 50% of the porosity of the surface, so that the pores are small and the porosity can increase the collection efficiency. The surface pores of the metal alloy is 400 to 1200㎛, the side pores are 200 to 600㎛, which is about 50% of the surface pores, the porosity is 86% ± 5%. In addition, the metal foam filter 40 is alloyed by adding chromium and iron to the Ni base.

The front flange 10 is vertically fixed to the front end of the metal foam filter 40 to prevent the fixing of the porous tube 50 and the filter is pushed forward.

The rear flange 20 is vertically fixed to the rear end of the metal foam filter 40 to prevent the fixing of the porous tube 50 and the filter from being pushed to the rear end.

The sealing mat 30 is inserted between the front flange 10 and the metal foam filter 40 and between the rear flange 20 and the metal foam filter 40, respectively, and has a metal having a similar coefficient of thermal expansion to the metal foam filter. Has a wire mesh shape. Since the sealing mat 30 is inserted between the front and rear flanges 10 and 20 and the metal foam filter 40 and fixed by a welding method, the sealing mat 30 can prevent deterioration of the sealing effect due to long time use and thus has excellent performance.

The jacket 60 is mounted between the front flange 10 and the rear flange 20, and is formed in the shape of a mesh to maintain the shape of the metal foam filter 40 in its original state and have durability. The foam filter 40 is enclosed. The jacket 60 is mounted in such a way that the jacket 60 surrounds the entire portion between the front flange 10 and the rear flange 20 to surround the entire metal foam filter 40.

Therefore, it is possible to effectively prevent leakage of exhaust gas generated by long-term use of DPF, a soot reduction device, to improve performance, and to prevent deterioration of sealing effect caused by long-term use. It is possible to weld, prevent the preservation and leakage of the form of metal foam filter, and regenerate the smoke reduction device because the heating and cooling are repeated periodically, causing thermal shock and durability problems, but the sealing mat is durable. Because it is excellent, the flow path can be kept constant even if the exhaust gas passes for a long time.

As described above, various substitutions, modifications, and changes can be made by those skilled in the art without departing from the technical spirit of the present invention, and thus, the embodiments and the accompanying drawings are limited. It doesn't happen.

As described above, the filter assembly for a smoke reduction device equipped with a sealing mat according to the present invention has the following effects.

First, by inserting a metal wire mesh-like sealing mat between the front flange and the metal foam filter, and between the rear flange and the metal foam filter, the metal foam and the coefficient of thermal expansion, respectively, DPF ( The long-term use of Diesel Particulate Filter) can effectively prevent leakage of exhaust gas and improve its performance.

Second, the present invention is excellent in performance because it is possible to prevent the deterioration of the sealing effect due to long-term use by using a sealing mat of the heat-resistant and durable metal wire mesh type.

Third, the present invention can be welded by using a sealing mat in the form of a metal wire mesh, and the preservation and leakage of the form of the metal foam filter can be prevented.

Fourth, the present invention is because the smoke reduction device is regenerated due to the nature of the periodic heating and cooling is repeated, the heat shock and durability problems occur, but the sealing mat is excellent durability can maintain the flow path even if the exhaust gas passes for a long time.

Claims (4)

In the filter assembly for a smoke reduction device equipped with a sealing mat, An inlet through which the exhaust gas combusted from the engine is introduced, and a porous tube discharged through the filter after the exhaust gas is introduced; A metal foam filter enclosed in a stacked or rolled form through which exhaust gas introduced into the porous tube passes; A front flange fixed vertically to the front end of the metal foam filter to fix the porous tube and prevent the filter from being pushed forward; A rear flange fixed perpendicularly to the rear end of the metal foam filter to fix the porous tube and prevent the filter from being pushed to the rear end; A sealing mat in the form of a metal wire mesh having a coefficient of thermal expansion similar to that of the metal foam between the front flange and the metal foam filter and between the rear flange and the metal foam filter; A jacket mounted between the front flange and the rear flange, the jacket surrounding the metal foam filter being formed in the shape of a mesh to maintain the shape of the metal foam filter in its original state and have durability; Filter assembly for a smoke reduction device equipped with a sealing mat, characterized in that it comprises a. The method of claim 1, A sealing mat equipped with a sealing mat, characterized in that the sealing mat inserted between the front flange and the metal foam filter and between the rear flange and the metal foam filter is welded and fixed to prevent deterioration of the sealing effect due to long time use. Filter assembly. The method of claim 1, The porous tube is a polygonal air passage is formed, the filter assembly for smoke reduction device equipped with a sealing mat, characterized in that the metal material. The method of claim 1, The metal foam filter is a filter assembly for a smoke reduction device equipped with a sealing mat, characterized in that the alloy is added by adding chromium and iron to the nickel base.

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