SU850880A1 - Non-cooled exhaust collector of i.c. engine with gas turbine supercharging - Google Patents

Description

The invention relates to mechanical engineering, in particular, engine-building, specifically to the arrangement of exhaust manifolds of gas-turbine supercharged internal combustion engines. Uncooled exhaust manifolds of internal combustion engines are known, containing exhaust pipelines equipped with sections, each of which is connected through a compensator to the adjacent section and through the sealing surface of the outlet flange to the cylinder cover, and the gas supply pipe of a turbocharger equipped with a compensator and connected 1 cylinder the angle to the extreme section of the CO exhaust pipe when the engine is running, the uncooled exhaust manifold, which is significantly heated, expands. In this case, the collector axis tends to move in parallel in the plane passing through this axis and the centers of the mating surfaces of the flanges securing the exhaust pipes to the cylinders, and the sections are extended along the axis of the collector. The extensions are axially compensated. compression of compensators located between the collector sections. The parallel movement of the collector axis is prevented by its connection with the turbo compressor, which leads to the appearance of unaxial forces causing deformation and, as a result, the stress state and destruction of the structural elements of the collector, especially the bellows type compensators, is most widely applied “.Ps in modern 1x designs of non-cooled OUTPUTS1ShH collectors. This is due to the mismatch of the angle of connection of the gas supply pipe of the nozzle to the extreme section of the exhaust pipe with the direction of the resulting thermal movement of the point of intersection of the collector axis with the axis of the gas supply pipe.

The purpose of the invention is to reduce the stresses in the exhaust manifold from the thermal deformations.

The goal is achieved by the fact that the axis of the gas supplying nozzle is located on the line passing through the center of the mating surface of the flange of the exhaust nozzle of the end section.

Figures 1 and 2 are a schematic diagram of the exhaust manifold in the projections.

The exhaust manifold includes an exhaust pipe equipped with sections 1, 2 and 3, compensators 4 and 5 and exhaust pipes 6,7 and 8, and a gas supply pipe 9 of the turbo compressor 10 equipped with a compensator P and connected at an angle to the extreme section 3 of the outlet pipeline Sections 1, 2 and 3 are connected to the cylinder cylinder 12 through the sealing surfaces 13,14 and 15 flanges 16,17 and 18 exhaust pipes 6,7 and 8.

The gas supply pipe 9 is connected to the turbo compressor 10 through the flanking surface 19 of the flange 20. The axis YY of the gas supply pipe 9 is inclined at an angle to the axis XX of the exhaust pipe and is located on a line passing through the center 21 of the sealing surface 15 of the flange 18 of the exhaust pipe 8 section 3.

The uncooled exhaust manifold works as follows.

When the engine is running, the exhaust manifold heats up and due to the linear expansions of the exhaust pipes 6-8 and sections 1, 2 and 3 begins to move away from the cylinder heads. The axial movements of sections 1.2 and 3 are perceived by the compensators 4 and 5, and the axial movement of the extreme section 3 towards the gas supplying pipe 9 leads to non-axial thermal stresses.

The direction of movement of point A is determined by the resultant AB, the components of the AU. and C B, f, respectively, axially and perpendicular to the axis XX (parallel to the movement of the axis of the collector XX) temperature expansion of the collector from point B to point A ..

The resulting AB. thermal movement of point A is easily defined as the hypotenuse of the right angle AB C / 1, whose tracks are the components AC and C B, moving point A, respectively, along the axis XX and perpendicular to it. Since the thermal displacement of point A

along the XX axis and perpendiculars to it in proportion to its corresponding coordinates, CA and Absolutely B, then right triangles ABC and AB., C. are similar and therefore

the resultant AB of the displacement of point A is located on the line passing through the points A, B and D, i.e. on the YY axis of the gas supplying pipe 9 of the turbocharger 10.

Such a connection between the exhaust manifold and the turbocharger 10 does not prevent the collector’s axis XX from being parallel when thermally expanding, since point A in this

In this case, it moves along the YY axis of the manifold transfer to the turbocharger.

Thus, non-axial thermal deformations and stresses in the proposed design are reduced, and

the axial displacements are fully perceived by the compression compressors. This significantly increases the life of the exhaust manifold and its operational reliability and

therefore, significantly reduces maintenance costs.

Formula of invention

Its cooled exhaust manifold

a gas turbine supercharged internal combustion engine, contents of an exhaust pipeline, supply sections, each of which is connected via a compensator to the adjacent

sections and through the flange of the exhaust flange to the cylinder head, and the gas supply pipe of the turbocharger, equipped with a compensator and connected at an angle to the extreme section of the exhaust pipe, characterized in that, p. In order to reduce the voltage from thermal deformations, the axis of the gas supplying pipe is located on the line, the passage -. through the center of the mating surface of the flange of the outlet of the extreme section.

Information sources,

take into account during the examination

1. For the application of the Federal Republic of Germany No. 2625788, cl. F 02 B 37/02, published 1977 Gprototip.

Claims (1)

Claim Uncooled exhaust manifold 35 of an internal combustion engine with a gas turbine supercharging, comprising an exhaust pipe provided with sections, each of which is connected through an expansion joint to an adjacent 40 section and through a mating surface, the surface of the exhaust pipe flange is connected to the cylinder cover, and a gas supply pipe of the turbocharger is provided compensator and connected at an angle to the extreme section of the exhaust pipe, characterized in that, in order to reduce stress from thermal deformations, the gas supply axis pat50 logging is on the line, prohodya-. through the center of the mounting surface of the flange of the outlet pipe of the end section. 55 Sources of information taken into account in the examination 1. The application of Germany No. 2625788, cl. D 02 B 37/02, published. 1977 (prototype).