SU1657684A1 - Catalytic neutralizer - Google Patents

Abstract

The invention relates to mechanical engineering and makes it possible to increase the reliability and durability of a catalytic neutralizer. The exhaust gases from the engine go through the inlet 7 to the catalytic unit 9 Inside the block 9, the gas passes through the channels formed by spiral-wound flat and corrugated metal tapes, the surface of which is covered with catalyst Fixing the block 9 in the housing 1 using fixing element 10 made in the form rod, prevents the emergence of the effect of film, te extrusion of the central zone of the spiral unit 9 in the flow of exhaust gases. 11 з п ф-лы, 15 ил

Description

FIG. I

The invention relates to the field of mechanical engineering, in particular, to internal combustion engines, namely to devices for reducing exhaust emissions.

The purpose of the invention is to increase reliability and durability.

In Fig. 1, a catalytic converter with a block catalyst and a block attachment element in a housing is occupied; figure 2 - section aa in figure 1; on fig.Z - view B in figure 1; figure 4 is a section bb In figure 1; Fig. 5 is a construction variant, the ends of the U-shaped fastening device are brought to the same end surface of the catalytic unit; 6 - the same, for fixing the block in the neutralizer case two Z-shaped fixing devices are used; 7 is the same, the Z-shaped fastening device in the middle of the block is made in the form of a wire, and its end sections are made in the form of gussets; Fig. 8 is a variant of the Z-mount; Fig. 9 shows a variant of the manufacture of a mounting device, made in the form of an L-shaped section with a threaded portion; Fig. 10 is a variant of fastening consisting of separate elements; in fig. 11 - a design variant, the neutralizer has a connector on the flanges on one side with fixing the block with a gusset on the other; 12 is the same, the mount is T-shaped; on Fig - option embedding block, where the mount is S-shaped; in fig. 14 is a section of YYY in FIG. 13; in fig. 15 is a variant in which the mount is 0-shaped.

The catalytic converter (Fig. 1) comprises a housing 1 consisting of inner half-shells 2 and 3, outer half-shells 4 and 5, laid between the half-shells of thermal insulation 6, inlet 7 and outlet 8 nozzles.

Inside the housing 1 there is a catalytic unit 9, through which a Z-shaped fastening device passes in the form of a rod passing through the unit 9 along its axis, and is provided with locking elements 10 located on the end surface of the unit 9 and fixed to the housing 1 (between the flanges of the inner shell 2 and 3 and the flanges of the nozzles 7 and 8) by welding or folding lock. Element 10 fixes block 9 in the neutralizer case with the possibility of receiving both axial and radial loads. The end portions of the fastening element, perpendicular to the axis of the block, prevent the appearance of the film effect, i.e. extruding the central zone of the spiral block 9 downstream of the exhaust gas. The end portions of the element 10 are recessed into the block body (FIG. 4), which prevents the coil from being displaced relative to each other under mechanical and thermal loads.

The catalytic converter works as follows.

Exhaust gas flows through the inlet 7 to the catalytic unit 9. Inside the block 9, the gas passes through channels formed by spiral-wound flat and corrugated metal tapes, the surface of which is covered with a catalyst. In the channels, oxidation reactions of products of incomplete combustion of fuel proceed. The fastening of the block 9 in the housing 1 with the help of a rod-shaped element 10 satisfies the requirements of reliability against the film effect and also allows the block to make small elastic displacements in the radial and axial directions during thermal deformations from one operating mode to another, and also greatly simplifies the installation of a block in the converter housing.

Claims (12)

1. An exhaust gas catalytic converter for an internal combustion engine comprising a housing with inlet and exhaust ports and a catalytic unit coaxially mounted with a mounting device in the housing to form exhaust passageways, characterized in that, in order to improve reliability and durability, the fastening is made in the form of at least one rod passing through the block along its axis and provided with locking elements located on both sides of the block, moreover at least one of the locking members is rigidly connected to the housing. 2, the neutralizer according to claim 1, characterized in that the housing and the unit are cylindrical. 3. The neutralizer in PP.1 and 2, about tl and h a-th y and with the fact that the rod and the locking elements are made of wire. 4. The neutralizer PP. 1 and 2, that is, with the fact that at least one fixing element is made with a kerchief. 5. The neutralizer PP. 1 and 2, about tl and h ayu yi and with the fact that the connection fixing element with the body is made using its flange connector. 6. The neutralizer PP. 1-5. different in that. Cho rod at least on one side is provided with a threaded connection with a cap nut. 7. Neutralizer popp. 1, 2, 4-6, characterized in that the rod is connected to at least one of the locking elements via an additionally installed elastic element. 8. The neutralizer according to claim 7, characterized in that the elastic element is made in the form of a pre-compressed spring. A9. The neutralizer in PP. 1, 2, 4-6, characterized in that the fixing elements are rigidly connected to the housing from two CIODOH units. 10. The neutralizer on PP. characterized in that the locking elements and the rod are made at the same time. 11. The neutralizer of claim 9, wherein the rod with the locking elements is U-shaped. 12. The neutralizer of claim 9, wherein the rod with the locking elements is Z-shaped. Type B (Reg. 3 FIG. 2 B-B 1 Yu FIG. four Yu 5 FIG. 7 Fia.9 ten, FIG. 6 Fie.8 Fiu one g U f rs R 13 JZZZSSZ FIG. 15