KR19990040246U - Buffer material of ceramic filter for diesel engine exhaust gas purifier. - Google Patents

Abstract

The present invention relates to a cushioning material of a ceramic filter for a diesel engine exhaust gas purifying device, and a mat of a fiber material having heat resistance and high rigidity is mounted on the outer periphery of the ceramic filter to absorb a shock generated when the case is fixed, thereby preventing damage to the filter. For the purpose of this, the cushioning material 5 is mounted on the outer periphery of the filter 52, the material of which is formed into a mat (mat; 60) type using ceramic fiber (ceramic fiber), between the mat (60) type The cushioning material is stacked on the outer periphery of the filter 52 in multiples of two or more, and is mounted so that the joints 62 of the mat 60 cross each other (180 °).

The cushioning material of the ceramic filter for diesel engine exhaust gas purifying device configured as described above is easy to join the case, resulting in improvement of workability and shortening of production time, and preventing damage to the filter due to impact, thereby increasing durability and purifying ability. It is a useful design that brings improvement.

Description

Buffer material of ceramic filter for diesel engine exhaust gas purifier.

The present invention relates to a cushioning material of a ceramic filter for a diesel engine exhaust gas purifying apparatus. More specifically, a fibrous mat is installed between the ceramic filter and the case so that the impact generated during fixing of the case does not reach the ceramic filter. This is to improve the purification ability by preventing equality due to impact.

The diesel engine exhaust gas purifier measures the current state of the diesel engine through various data to supply fuel and air to the combustion unit and ignite the mixed gas by means of ignition means to maximize the harmful components and particulate matter collected in the ceramic filter. To be removed and discharged.

The purification device having the above role is provided at one side of the diesel engine as shown in FIG. 1. In the diesel engine, the exhaust pipe 11 of the diesel engine 10 accumulates exhaust gas from each exhaust manifold 12. The rear end of the exhaust pipe 11 has control valves 13 and 14 in the middle, and is separated into the combustor 15 side and the muffler 16 side, and the blower 17 is connected to the rear of the combustor 15.

The diesel engine 10 has a signal value from the throttle sensor 18, the rotation speed sensor 19, and a barometer 20 indicating the pressure as an input value for performing the exhaust gas purifying apparatus. Unit 21, where the solenoids 22, 23, 24 are controlled with the input signals from each sensor as defaults for optimal combustion control.

The solenoids 22, 23 and 24 control the control valves 13 and 14 located halfway between the combustor 15 and the muffler 16 in the rear of the exhaust pipe 11, and supply fuel for incineration of harmful gases. Supply feed from the air compressor 27 using the power of the diesel engine 10 to control the fuel pump 26 for supplying fuel from the fuel tank 25 and to provide injection power of the fuel from the fuel pump 26. By controlling the air pressure regulator 28 to control the injection amount of fuel and air of the nozzle 29 mounted on the combustor 15 is adjusted.

The control signal of the ECU 21 performs the above-described control activities and controls the ignition transformer 31 to cause sparks in the ignition means 32 made of an ignition rod or a glow plug, so that combustion of harmful gases is optimal. Is performed in

As described above, harmful substances such as dust in the exhaust gas of the diesel engine are collected by the ceramic filter 37 in the purification device, and the collected dust is minimized by combustion by the burner 36. And a combustor required for the collection and combustion of hazardous substances is provided on one side of the mixing liner body 34 with an inlet trap 33 for introducing the exhaust gas generated from the engine, and the fuel and air at the tip of the mixing liner body 34. A burner assembly 36 having a nozzle 29 for supply and a swirler 35 and an ignition means 32 is mounted.

A front end portion of the mixing liner body 34 is connected to a burner assembly 36 and a rear end portion thereof is provided with a frusto-conical mixing liner 39 connected to a filter case 38 having a ceramic filter 37 therein. The liner 39 is provided with a plurality of inlet holes 41 for introducing the exhaust gas passing through the exhaust gas trap 40 through the inlet trap 33.

The combustor 15 as described above is ignited by the ignition burner assembly 36 when the exhaust gas of the engine flows into the mixing liner 39 through the inlet trap 33, and then the combustion supplied through the swirler 35. The temperature in the mixing liner 39 is increased by using air to burn dust and harmful substances collected in the filter 37 and then discharged to the atmosphere.

As described above, the filter 37 for collecting dust and harmful substances contained in the exhaust gas of the engine and discharging them after combustion is mounted in the cylindrical case 38 made of metal, as shown in FIG. It must meet the requirements, such as excellent heat resistance to withstand high temperatures, the formation of fine pores, and excellent ventilation.

It is a ceramic material that satisfies these requirements, and has a strong property of withstanding high temperatures, and its roots are soil-like properties, which are hollow, breathable, and excellent materials.

Such a ceramic filter filter 37 is provided in the metal casing 38 for external damage and stable fixing when mounted in the combustor 15. The casing 38 is bent by bending like a cylindrical or ellipse. After the filter 37 is mounted inward, both edges bent by bending are fixed to each other.

When the case 38 is fixed while the ceramic filter 37 is mounted as described above, an impact is applied to the filter 37 during the crimping or other fixing process, thereby causing cracks in the filter 37 which is a ceramic material. This is the cause of the occurrence, the portion close to the fixed portion of the case 38 is assembled in a broken state in severe cases.

As such, when cracks or breakages occur in the filter 37, the collection efficiency is lowered, the purification ability is lowered, and there is a problem in that durability is degraded by intensively acting on the cracked portion under continuous heat load.

Therefore, the present invention was devised to solve the various problems described above. To prevent damage to the filter by absorbing the shock generated when the case is fixed by mounting a mat of a fiber material having heat resistance and high rigidity on the outer periphery of the ceramic filter. For sake.

1 is an overall configuration diagram of a diesel engine exhaust gas purification apparatus for the description of the present invention,

Figure 2 is a cross-sectional view showing a coupling state of a conventional ceramic filter and the case,

3 is a sectional view showing a combustor to which the present invention is applied;

4 is a cross-sectional view of the ceramic filter to which the present invention is applied,

* Explanation of symbols used in the main part of the drawing *

5; buffer material

52; filter

53; case

60; Matt

62; junction area

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

3 is a cross-sectional view showing a combustor to which the present invention is applied, and FIG. 4 is described together with a cross-sectional view of a ceramic filter to which the present invention is applied.

Equipped with a combustion engine for the exhaust gas purifier of the diesel engine is provided with a shock absorbing material and a buffer for maintaining the temperature generated when assembling a filter for collecting dust and harmful substances.

The combustor 6 provided with the cushioning material 5 is provided with a burner assembly 50 and a mixing liner body 51 for acting as a combustion chamber on the front of the cylinder based on a cylinder, and a ceramic filter 52 at the rear thereof. Is formed together with the case 53.

The burner assembly 50 is composed of a swirler 54 for supplying compressed air and a nozzle 55 for supplying fuel, and a glow plug 56, which is an ignition means, is mounted at one end thereof to generate sparks. Promote

The burner assembly 50 configured as described above is inserted and fixed at one side of the mixing liner body 51 having the truncated cone-shaped mixing liner 59 which serves as the inlet trap 57 and the combustion chamber 58 for introducing the exhaust gas of the engine. do.

As described above, the flame of the burner assembly 50 and the compressed air combusted by the mixing liner 59 flow into the filter 52 formed at the rear of the mixing liner 59, and the filter 52 is formed at its outer circumference. It is fixed in the case 53 by mounting a mat (mat; 60) of the fiber material formed of ceramic fiber (ceramic fiber), the case 53 is reduced in the diameter of the discharge port 61 side for the smooth discharge of the combustion gas Thereby increasing the flow rate of the fluid.

The mat 60 formed on the outer periphery of the filter 52 is stacked as a double or more multiple, as shown in Figure 4, at this time, so that the junction 62 of the mat 60 cross each other (180) 。).

Looking at the operating state of the present invention configured as described above; First, the filter 52 using the ceramic material is formed, and the case 53 is provided with various fastening holes for bending the cylindrical or oval to be fastened with the mixing liner body 51.

The filter 52 mounted in the case 53 provided as described above is formed around the outer periphery of the mat 60 made of a fiber material composed of ceramic fibers, and the mat 60 is formed of a double or more multiples. The joints 62 intersect with each other to prevent hot compressed air from leaking through them.

When the mounting of the mat 60 is completed on the outer periphery of the filter 52 as described above, it is fixed by using a bent metal case 53 bent, the joint portion of the case 53 uses a conventional fixing means To fix it.

As described above, in the fixing operation of the case 53, an impact by a fixing device or a tool occurs, which is transferred to the filter 52, but the mat 60 of the fibrous material formed on the outer periphery buffers the shock wave to filter 52. It does not directly affect) and prevents problems such as cracks and breakage.

The cushioning material of the ceramic filter for diesel engine exhaust gas purifying device configured as described above is easy to join the case, resulting in improvement of workability and shortening of production time, and preventing damage to the filter due to impact, thereby increasing durability and purifying ability. It is a useful design that brings improvement.

Claims (1)

In the case of providing a shock absorbing material for the exhaust gas purifier filter of the diesel engine and the buffer material for maintaining the temperature; The buffer material 5 is mounted on the outer periphery of the filter 52, the material is formed into a mat (mat; 60) type using ceramic fiber (ceramic fiber), Between the mat (60) -type cushioning material is laminated on the outer periphery of the filter 52 in a double or more multiple, at this time is mounted so that the joints 62 of the mat (60) to cross (180 °) to each other. A cushioning material for a ceramic filter for diesel engine exhaust gas purifying apparatus, characterized in that.