RU202147U1 - EXHAUST MANIFOLD OF INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

The exhaust manifold of an internal combustion engine contains straight and curved pipelines (1) and (2), as well as six branch pipes (3-8) with flanges (9-14) for attaching to the cylinder heads of the internal combustion engine. The compensator (15) with an insert (16) is installed between the parts of the pipeline (1) and (2). The connection of the parts of the pipeline and the compensator is carried out by means of V-shaped clamps (17). The flanges (21) and (22) of the pipelines are connected to the flanges (23) and (24) of the compensator (15), rigidly connected by welding to its bellows part. The connected ends of the pipeline flanges (21, 23) and the compensator flanges (22, 24) are made multi-stage with the possibility of mating with each other with a small gap and the formation of a labyrinth seal. At the ends of the liner (16), spherical sections (25) are made to compensate for the angular movement of pipelines (1) and (2). The spherical sections (25) mate with the corresponding cylindrical surfaces (26) and (27) of the pipelines (1) and (2). The technical solution ensures tightness and reliability of the connection and the device as a whole, and also increases the service life of the exhaust manifold. 3 ill.

Description

The utility model relates to engine building, namely, to the design of the exhaust system in internal combustion engines.

Known engine exhaust manifold, consisting of two parts, at the junction of which is put on and welded corrugation (JP No. 4568582 B2, IPC F01N 7/10 (2006.01), published on 30.04.2009).

The known solution has insufficient reliability indicators, since when operating in a high temperature zone, due to thermal linear expansion, there is a danger of changing the geometry of the pipes, warping the exhaust manifold, leading to a deterioration in the conditions for dismantling the manifold parts during repair, a violation of the tightness of the joints and a high probability of formation cracks.

It is also known a flange-clamp connection, intended, among other things, for connecting the components of the exhaust manifolds of an internal combustion engine, containing pipes with flanges at the ends of the pipeline, an annular sealing element installed in conical grooves made on the mating surfaces of the flanges, a fastening element in the form of a V-shaped clamp , tightening the flanges along the outer surface, a centering element in the form of a ring, installed in stepped grooves made on the inner surface of the flanges and in contact with the sealing element, a central sleeve and a thin-walled compensator in the form of a corrugated tube, while the ends of the central sleeve are mated along the inner cylindrical surface flanges with the ends of the pipeline, and the thin-walled expansion joint is mated with the ends along the outer surface of the flanges of the said expansion joint, in addition, the pipeline flanges are made in one piece with the pipes.

Due to the presence of centering elements in the form of rings installed in the conical grooves on the mating surfaces of the flanges and sealing elements, the reliability of the connection and the device as a whole is reduced.

The prototype to the claimed technical solution in terms of the combination of essential features and the achieved technical result is the exhaust manifold of an internal combustion engine, containing a pipeline to which pipes with flanges of attachment to the engine cylinder heads are connected, made composite and having an expansion joint with an insert located between the parts of the pipeline, while the expansion joint is fixed on both sides with V-shaped clamps, the axes of the nozzles are located perpendicular to the axis of the pipeline, and there are stiffeners on the two flanges of the nozzles (RU No. 188244 U1, IPC F01N 13/10 (2010.01), published 04.04.2019).

The disadvantage of this technical solution is that, based on the manufacturability of the design, taking the thickness of the expansion joint flanges equal to the thickness of its bellows part, the reliability of the flange connection is insufficiently ensured. This is manifested by the appearance of a leakage of the connection. In addition, when working in a high temperature zone, due to thermal linear expansion, there is also the possibility of changing the geometry of the expansion joint flanges due to the warpage process and the likelihood of cracking on the surface of the flanges.

The objective of this utility model is to improve the reliability of the device.

The task is achieved by the fact that in the exhaust manifold of an internal combustion engine, containing a composite pipeline with pipes made in one piece with it and equipped with flanges for attaching to the engine cylinder heads and the turbocharger, as well as stiffeners, an expansion joint located between the parts of the pipeline, fixed by its own flanges to the pipeline flanges with V-shaped clamps, a liner installed inside the compensator, the compensator is made in the form of a thin-walled corrugated tube rigidly fixed to the flanges, the liner has spherical sections at the ends, with which it mates along the inner cylindrical surface of the flanges with the ends of the pipeline pipes, while being connected the ends of the pipeline flanges and the compensator are made multistage with each other, with the possibility of mating with each other with a small gap.

The set of distinctive features, consisting in the fact that the compensator is made in the form of a thin-walled corrugated tube rigidly fixed to the flanges, the liner has spherical sections at the ends, which it mates on the inner cylindrical surface of the flanges with the ends of the pipeline pipes, while the ends of the pipeline flanges are connected to each other and the compensator are made multi-stage with the possibility of interfacing with each other with a small gap, which improves the reliability and durability of the device.

The analysis of the known technical solutions, carried out according to scientific, technical and patent documentation, showed that the set of essential features of the proposed technical solution is not known from the prior art.

The utility model is illustrated by the following drawings:

fig. 1 - an exhaust manifold of an internal combustion engine, general front view;

fig. 2 - the same, in section;

fig. 3 is the same enlarged view of the detail A in FIG. 2.

The exhaust manifold of an internal combustion engine contains straight and curved pipelines 1 and 2, as well as six branch pipes 3-8 with flanges 9-14 for attaching to the cylinder heads of the internal combustion engine. The axes of the nozzles 4, 6, 7 are located perpendicular to the axis of the pipeline 1, and the axes of the nozzles 3, 5, 8 are located at different angles to the axis of the pipeline 2.

The compensator 15, the bellows part of which is made in the form of a thin-walled corrugated tube, with a liner 16 placed inside, is installed between the pipeline parts 1 and 2. The parts of the pipeline and the compensator are connected by means of V-shaped clamps 17.

On the pipeline 2 there is a flange 18 for connection with a turbocharger, while at the transition of the flange 18 into the body of the pipeline 2 there are stiffeners 19. Also on the pipeline 2 there are stiffeners 20 to give rigidity and strength between the flanges 12, 13 of the pipes 6, 7 and body of the pipeline.

The flanges 21 and 22 of the pipelines are connected to the flanges 23 and 24 of the compensator 15, which are rigidly welded to its bellows part. The connected ends of the pipeline flanges 21, 23 and the compensator flanges 22, 24 are made multistage with the possibility of interfacing with each other with a small gap and forming a labyrinth seal. In this case, the geometry of the mating surfaces of the flanges provides both the mutual centering of the flanges themselves during the assembly of the joints, and their improved sealing properties, which positively affects the reliability of the joint and the device as a whole.

At the ends of the insert 16, spherical sections 25 are made to compensate for the angular movement of pipelines 1 and 2. The spherical sections 25 are mated with the corresponding cylindrical surfaces 26 and 27 of pipelines 1 and 2.

Multistage flanges of pipelines 1 and 2 and of the compensator 15 together with V-shaped clamps 17 ensure the reliability of the connection of pipelines 1 and 2, prevents the movement of the pipe flanges relative to the plane of attachment to the engine cylinder head. The available stiffeners 19 and 20 ensure the reliability and durability of the exhaust manifold as a whole, excluding the formation of cracks.

The exhaust manifold of an internal combustion engine is made of composite, heat-resistant cast iron is mainly used as the main material, and its thin-walled components are made of steels of different grades, which ensure their operability under operating conditions.

The exhaust manifold operates as follows.

Branch pipes 3-8 with flanges 9-14 of pipelines 1 and 2 are connected to the cylinder heads of the internal combustion engine by means of a threaded connection using a sealing gasket in each formed joint. When the internal combustion engine is operating, the exhaust gases with a high temperature pass through the inner cavity of the pipes 3-8, and then smoothly change the direction of flow and flow from the pipeline 1 and 2 into the turbocharger to drive the turbine wheel. In this case, the exhaust gases heat up pipelines 1 and 2, the thermal elongation is absorbed by the expansion joints 15, while it is compressed. The direct impact of the exhaust gases is perceived by the liner 16, and the tightness of the connection of pipelines 1 and 2 is ensured by the design of the compensator 15 with the existing flange connections.

The claimed technical solution allows to ensure tightness and reliability of the connection, which also increases the service life of the exhaust manifold.

The implementation of the utility model is possible on standard technological equipment using previously mastered technologies.

Claims (1)

The exhaust manifold of an internal combustion engine, containing a composite pipeline with nozzles made in one piece with it and equipped with mounting flanges to the engine cylinder heads and the turbocharger, as well as stiffeners, an expansion joint located between the pipeline parts, fixed with its flanges to the pipeline flanges V-shaped a liner installed inside the compensator with clamps, characterized in that the compensator is made in the form of a thin-walled corrugated tube rigidly fixed to the flanges, the liner has spherical sections at the ends, with which it mates on the inner cylindrical surface of the flanges with the ends of the pipeline pipes, while the ends are connected to each other the flanges of the pipeline and the compensator are made multistage with the possibility of interfacing with each other with a small gap.

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