CN117432511A

CN117432511A - Bidirectional flow combined adjusting structure based on flow separation

Info

Publication number: CN117432511A
Application number: CN202311537583.7A
Authority: CN
Inventors: 田永海; 孙丹红; 张大源; 柴华; 张翔宇; 徐洋
Original assignee: China North Engine Research Institute Tianjin
Current assignee: China North Engine Research Institute Tianjin
Priority date: 2023-11-17
Filing date: 2023-11-17
Publication date: 2024-01-23

Abstract

The invention provides a bidirectional flow combined regulating structure based on flow separation, which comprises a left end flange pipe, a bidirectional flow regulating pipe and a right end flange pipe, wherein the left end flange pipe, the bidirectional flow regulating pipe and the right end flange pipe are sequentially arranged; the bidirectional flow regulating pipe comprises a first flange pipe, a second flange pipe, a gas flow guiding pipe and a corrugated pipe, wherein the two gas flow guiding pipes are arranged between the first flange pipe and the second flange pipe, the end parts of the two gas flow guiding pipes are respectively connected with the first flange pipe or the second flange pipe, a gap exists between the two gas flow guiding pipes, the first flange pipe is connected with the second flange pipe through the corrugated pipe, and the corrugated pipe is arranged on the outer side of the gas flow guiding pipe. The invention has the beneficial effects that: the scouring of the gas to the outer corrugated pipe is reduced, and the service life of the part is prolonged; two relatively independent gas flow guide pipes are adopted, so that the bidirectional flow combined adjusting structure can absorb larger deformation of the pipeline.

Description

Bidirectional flow combined adjusting structure based on flow separation

Technical Field

The invention belongs to the technical field of engines, and particularly relates to a bidirectional flow combined adjusting structure based on flow separation.

Background

The exhaust manifolds of the V-shaped engine are two, and some engines need to be communicated with the exhaust manifolds at two sides of the cylinder head of the split engine due to the matching requirement of the turbocharger and the engine. Because of the intermittence of the exhaust gas of each cylinder of the engine (the exhaust time is about 1/4 of the total operating time), the exhaust gas in the communication pipeline flows from the left side to the right side, and flows from the right side to the left side, namely, flows in two directions; the temperature of the exhaust pipeline is changed greatly due to the alternate changing of working conditions such as starting, running and stopping of the engine, so that the exhaust pipeline is subjected to alternate deformation caused by thermal expansion and cold contraction, and in order to avoid damage caused by overlarge deformation of the exhaust pipeline of the engine, a part capable of absorbing deformation is needed; there is a need for a component that satisfies both exhaust gas bi-flow and deformation absorption.

Disclosure of Invention

In view of the above, the present invention aims to provide a bidirectional flow combined adjusting structure based on flow separation, so as to solve the problem of exhaust manifold communication at two sides of a V-shaped engine.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

the bidirectional flow combined adjusting structure based on flow separation comprises a left end flange pipe, a bidirectional flow adjusting pipe and a right end flange pipe, wherein the left end flange pipe, the bidirectional flow adjusting pipe and the right end flange pipe are sequentially arranged;

the bidirectional flow regulating pipe comprises a first flange pipe, a second flange pipe, a gas flow guiding pipe and a corrugated pipe, wherein the two gas flow guiding pipes are arranged between the first flange pipe and the second flange pipe, the end parts of the two gas flow guiding pipes are respectively connected with the first flange pipe or the second flange pipe, a gap exists between the two gas flow guiding pipes, the first flange pipe is connected with the second flange pipe through the corrugated pipe, and the corrugated pipe is arranged on the outer side of the gas flow guiding pipe.

Further, the first flange pipe is connected with the left end flange pipe through bolts, and the second flange pipe is connected with the right end flange through bolts. The first flange pipe corresponds to the left end flange pipe, and the second flange pipe corresponds to the right end flange pipe.

Further, the end of the gas flow guide tube extends into a diffuser guide arc.

Further, the angle between the diffusion guide arc and the gas flow guide tube is 27-45 degrees.

Further, sealing gaskets are arranged between the first flange pipe, the second flange pipe and the gas flow guiding pipe.

Further, the two gas flow guiding pipes are symmetrically arranged on the inner side of the bidirectional flow regulating pipe.

Further, the distance between the two gas flow guiding tubes is less than 5% of the inner diameter of the gas flow guiding tubes.

Further, the material of the gas flow guiding tube is a high temperature resistant metal material, preferably one of nickel-based superalloy, molybdenum-based superalloy, titanium-based superalloy and copper-based superalloy.

The protruding height of the corrugation to the inner side is the same in the cylindrical direction; the corrugated pipe on the outer side of the bidirectional flow regulating pipe absorbs the axial deformation and the radial deformation of the exhaust pipeline during the structure.

The left end flange pipe, the bidirectional flow regulating pipe and the right end flange pipe are connected with bolts in a fastening mode through nuts, the left end flange pipe, the right end flange pipe, the nuts, the bolts and the sealing gasket are made of temperature-resistant metal materials, and preferably, the nuts are provided with self-locking functions.

Compared with the prior art, the bidirectional flow combined regulating structure based on flow separation has the following advantages:

the invention absorbs the deformation between the exhaust pipelines through the outer corrugated pipe of the bidirectional flow regulating pipe, and the symmetrical gas flow guiding pipe at the inner side of the bidirectional flow regulating pipe guides the gas to flow bidirectionally; the flow characteristics of the gas are applied, and a sudden expansion structure is adopted at the tail end of the gas flow guide pipe, so that when the exhaust gas flows into the other gas flow guide pipe from one gas flow guide pipe, the gas is separated from the wall surface of the guide pipe, the scouring of the gas to the outer corrugated pipe is reduced, and the service life of parts is prolonged; and two relatively independent gas flow guide pipes are adopted, so that the bidirectional flow combined adjusting structure can absorb larger deformation of the pipeline.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a cross-sectional view of a flow separation based two-way flow combining and conditioning structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of a left-end flanged pipe according to an embodiment of the invention;

FIG. 3 is a cross-sectional view of a bi-directional flow regulator tube according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a bidirectional flow regulating pipe according to an embodiment of the present invention;

FIG. 5 is a schematic view of a right-end flanged pipe according to an embodiment of the invention;

FIG. 6 is a schematic view of a nut according to an embodiment of the present invention;

FIG. 7 is a schematic view of a bolt according to an embodiment of the present invention;

fig. 8 is a schematic view of a gasket according to an embodiment of the invention.

Reference numerals illustrate:

1. a left end flange pipe; 2. a bi-directional flow regulating tube; 3. a right-end flange pipe; 4. a nut; 5. a bolt; 6. a sealing gasket; 21. a bellows; 22. a gas flow guide tube; 23. a diffusion guiding arc structure; 24. a first flanged pipe; 25. a second flanged pipe; gamma, diffusion guide angle; t, the distance of the end of the gas flow guiding tube.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1 to 8, a bidirectional flow combined adjusting structure based on flow separation comprises a left end flange pipe 1, a bidirectional flow adjusting pipe 2, a right end flange pipe 3, a nut 4, a bolt 5 and a sealing gasket 6 which are sequentially arranged as shown in fig. 1 to 8; the left end flange pipe 1, the bidirectional flow regulating pipe 2 and the right end flange pipe 3 are tightly connected with a bolt 5 by nuts 4 and are sealed by sealing gaskets 6; the outside of the bidirectional flow regulating pipe 2 is provided with a corrugated pipe 21 which can deform axially and radially, and the inside of the bidirectional flow regulating pipe 2 is provided with two symmetrical gas flow guiding pipes 22; the ends of the gas flow guide tubes have a diffuser-directed circular arc structure 23 (similar to a horn outlet) and the ends of the two gas flow guide tubes are spaced apart by a distance t.

The distance between the ends of the two gas flow guiding pipes 22 is less than 5% of the inner diameter of the gas flow guiding pipes, and the angle gamma of the diffusion guiding at the ends of the gas flow guiding pipes is between 27 and 45 degrees.

The working principle of the bidirectional flow combined adjusting structure based on flow separation is as follows:

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. Two-way flow combination regulation structure based on flow separation, its characterized in that: the device comprises a left end flange pipe (1), a bidirectional flow regulating pipe (2) and a right end flange pipe (3), wherein the left end flange pipe (1), the bidirectional flow regulating pipe (2) and the right end flange pipe (3) are sequentially arranged;

the bidirectional flow regulating pipe (2) comprises a first flange pipe (24), a second flange pipe (25), a gas flow guiding pipe (22) and a corrugated pipe (21), wherein the two gas flow guiding pipes (22) are arranged between the first flange pipe (24) and the second flange pipe (25), the end parts of the two gas flow guiding pipes (22) are respectively connected with the first flange pipe (24) or the second flange pipe (25), a gap exists between the two gas flow guiding pipes (22), the first flange pipe (24) and the second flange pipe (25) are connected through the corrugated pipe (21), and the corrugated pipe (21) is arranged on the outer side of the gas flow guiding pipe (22).

2. A flow separation based bi-directional flow combining and conditioning structure as recited in claim 1, wherein: the first flange pipe (24) is connected with the left end flange pipe (1) through bolts (5), the second flange pipe (25) is connected with the right end flange through bolts (5), the first flange pipe (24) corresponds to the left end flange pipe (1), and the second flange pipe (25) corresponds to the right end flange pipe (3).

3. A flow separation based bi-directional flow combining and conditioning structure as recited in claim 1, wherein: the end of the gas flow guide tube (22) extends into a diffuser guide arc.

4. A flow separation based bi-directional flow combining and conditioning structure as recited in claim 3, wherein: the angle between the diffusion guide arc and the gas flow guide tube (22) is 27-45 degrees.

5. A flow separation based bi-directional flow combining and conditioning structure as recited in claim 1, wherein: sealing gaskets (6) are arranged between the first flange pipe (24), the second flange pipe (25) and the gas flow guide pipe (22).

6. A flow separation based bi-directional flow combining and conditioning structure as recited in claim 1, wherein: the two gas flow guiding pipes (22) are symmetrically arranged on the inner side of the bidirectional flow regulating pipe (2).

7. A flow separation based bi-directional flow combining and conditioning structure as recited in claim 1, wherein: the distance between the two gas flow guiding pipes (22) is less than 5% of the inner diameter of the gas flow guiding pipes (22).

8. A flow separation based bi-directional flow combining and conditioning structure as recited in claim 1, wherein: the material of the gas flow guide tube (22) is a high-temperature-resistant metal material.