CN213205809U

CN213205809U - Telescopic engine exhaust manifold

Info

Publication number: CN213205809U
Application number: CN202022177533.0U
Authority: CN
Inventors: 曾黎; 余超; 杨仕明
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-05-14
Anticipated expiration: 2030-09-28

Abstract

The utility model discloses a telescopic engine exhaust manifold, including first manifold, second manifold, bellows, first manifold, second manifold pass through the bellows is connected sealedly, still includes the honeycomb duct, the right-hand member of honeycomb duct is equipped with the flange face, the left side of flange face and the outside junction of honeycomb duct are equipped with annular step, and its left end is the ladder column structure that the external diameter diminishes; the right end of the corrugated pipe is welded on the annular boss, and the left end of the corrugated pipe is welded with a flange sheet which is in sealing connection with the second manifold; the right end of the flow guide pipe is hermetically connected with the left end of the first manifold through a flange surface; the right end face of the second manifold is provided with a counter bore matched with the left end of the corrugated pipe, the left end of the corrugated pipe extends into the counter bore, the left end face of the corrugated pipe is spaced from the bottom face of the counter bore by 3-5mm, a gap is formed between the outer side of the left end face of the corrugated pipe and the side wall of the counter bore, and the gap is 0.2-0.5 mm. The utility model has the advantages of compact structure, reliable sealing and the like.

Description

Telescopic engine exhaust manifold

Technical Field

The utility model relates to an exhaust pipe technical field especially relates to a telescopic engine exhaust manifold.

Background

At present, in a turbocharged engine, a supercharger is connected with an engine cylinder head through one or more sections of exhaust manifolds, the exhaust manifolds are important parts for connecting the engine cylinder head with the supercharger, and high-temperature gas after combustion in each cylinder of the engine flows to a supercharger vortex end through the exhaust manifolds. In the process, the exhaust manifold functions to support the supercharger, contain and deliver high temperature gases. Under the large background of the upgrading of engine emission, the temperature of engine exhaust gas is higher and higher, the working environment of an exhaust manifold is worse and worse, the high-temperature thermal expansion deformation of an exhaust pipe is correspondingly increased, the exhaust pipe is cracked and warped to cause air leakage of an exhaust system, the working efficiency of an engine is influenced slightly, the emission of the engine is influenced beyond the standard, and even safety risks such as ignition are possibly caused.

The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an engine exhaust manifold compact structure, sealed reliable can adapt to the flexible volume of thermal energy.

To this end, the utility model provides a telescopic engine exhaust manifold.

Preferably, the present invention may also have the following technical features:

a telescopic engine exhaust manifold comprises a first manifold, a second manifold and a corrugated pipe, wherein the first manifold and the second manifold are connected and sealed through the corrugated pipe; the right end of the corrugated pipe is welded on the annular boss, and the left end of the corrugated pipe is welded with a flange sheet which is in sealing connection with the second manifold; the right end of the flow guide pipe is hermetically connected with the left end of the first manifold through a flange surface; the right end face of the second manifold is provided with a counter bore matched with the left end of the corrugated pipe, the left end of the corrugated pipe extends into the counter bore, the left end face of the corrugated pipe is spaced from the bottom face of the counter bore by 3-5mm, a gap is formed between the outer side of the left end face of the corrugated pipe and the side wall of the counter bore, and the gap is 0.2-0.5 mm.

Further, the inner diameter of the flow guide pipe is the same as that of the first manifold and the second manifold.

Further, a sealing gasket is arranged at the joint of the corrugated pipe and the first manifold.

Furthermore, the left side of the flange sheet is a plane, and the middle part of the right side is provided with a lug which is integrally formed with the flange sheet; and the left end of the corrugated pipe is welded and fixed with the lug.

Further, the inner diameter of the flange plate is the same as the diameter of the counter bore.

Furthermore, the middle part of bellows is the ripple section, and both ends are equipped with straight connecting portion respectively, the transition department that honeycomb duct left end external diameter diminishes is located the middle part of bellows left end connecting portion.

The utility model discloses beneficial effect with the prior art contrast includes: a sealing gasket is additionally arranged at the joint of the corrugated pipe and the first manifold, so that the sealing property of the joint is improved; the inner diameter of the flow guide pipe is the same as that of the first manifold and the second manifold, so that the gas flow is more stable; when gas enters the corrugated pipe from the gap between the flow guide pipe and the side edge of the counter bore and then collides with the inclined plane at the transition position where the outer diameter of the left end of the flow guide pipe is reduced, the direction of the gas is changed, and the gas is prevented from diameter scouring the corrugated section.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts, unless otherwise specified.

A telescopic engine exhaust manifold as shown in figure 1 comprises a first manifold 1, a second manifold 2 and a corrugated pipe 4, wherein the first manifold 1 and the second manifold 2 are connected and sealed through the corrugated pipe 4. The guide pipe is characterized by further comprising a guide pipe 3, a flange surface 7 is arranged at the right end of the guide pipe 3, and an annular step 8 is arranged at the joint of the left side of the flange surface 7 and the outer side of the guide pipe 3; the left end of the draft tube 3 is a stepped column structure with a reduced outer diameter. When the honeycomb duct is installed, a flange surface 7 of the honeycomb duct 3 is fixed at the left end of the first manifold 1 by using a bolt 6; the right end of the corrugated pipe 4 is welded on the annular boss 8, and a flange plate 9 is welded at the left end of the corrugated pipe 4, and the flange plate 9 is connected and sealed with the second manifold 2 through bolts. Correspondingly, a counter bore 10 matched with the left end of the corrugated pipe 4 is arranged on the right end face of the second manifold 2, a gap is formed between the left end face of the corrugated pipe 4 and the bottom face of the counter bore 10, the gap is 3-5mm, a gap is formed between the outer side of the left end face of the corrugated pipe and the side wall of the counter bore 10, and the gap is 0.2-0.5 mm. In order to ensure the stable flow of the gas, the inner diameter of the draft tube 3 is the same as that of the first manifold 1 and the second manifold 2. Meanwhile, in order to improve the sealing property, a sealing gasket 5 is additionally arranged at the joint of the corrugated pipe 4 and the first manifold 1.

In a preferred implementation method, the left side of the flange plate 9 is a plane, a bump 11 integrally formed with the right side is arranged in the middle of the right side, and the left end of the corrugated pipe 4 is welded and fixed with the bump 11; the inner diameter of the flange plate 9 is the same as the diameter of the counter bore. Thus, the lug 11 and the corrugated pipe 4 are welded and fixed, the operability of the whole corrugated pipe 4 structure is improved, and the corrugated pipe 4 and the flow guide pipe 3 are prevented from interfering during installation. When the right end of the corrugated pipe 4 is welded at the right end of the flow guide pipe 3, the inner wall of the flange plate 9 is pressed at the left end of the flow guide pipe 3, so that the corrugated pipe 4 and the flow guide pipe 3 always keep a distance, and the corrugated section of the corrugated pipe 4 is prevented from being pressed at the outer side of the flow guide pipe 3.

More specifically, the middle part of the corrugated pipe 4 is a corrugated section, straight connecting parts (41,42) are respectively arranged at two ends of the corrugated pipe, and a transition part 43 where the outer diameter of the left end of the draft tube 3 is reduced is located in the middle of the connecting part 41 at the left end of the corrugated pipe 4. Therefore, when gas enters the corrugated pipe 4 from the gap between the flow guide pipe 3 and the side edge of the counter bore 10 and then collides with the inclined plane of the transition part 43 with the reduced outer diameter at the left end of the flow guide pipe 3, the direction of the gas is changed, and the diameter scouring of the corrugated section of the corrugated pipe 4 by the gas is avoided.

Those skilled in the art will recognize that numerous variations are possible in light of the above description, and therefore the examples and drawings are merely intended to describe one or more specific embodiments.

While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions can be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents falling within the scope of the present invention.

Claims

1. A retractable engine exhaust manifold comprising a first manifold, a second manifold, a bellows, the first manifold and the second manifold being sealed by the bellows, the retractable engine exhaust manifold comprising: the guide pipe is characterized by further comprising a guide pipe, a flange surface is arranged at the right end of the guide pipe, an annular step is arranged at the joint of the left side of the flange surface and the outer side of the guide pipe, and the left end of the guide pipe is of a stepped column structure with a reduced outer diameter; the right end of the corrugated pipe is welded on the annular boss, and the left end of the corrugated pipe is welded with a flange sheet which is in sealing connection with the second manifold; the right end of the flow guide pipe is hermetically connected with the left end of the first manifold through a flange surface; the right end face of the second manifold is provided with a counter bore matched with the left end of the corrugated pipe, the left end of the corrugated pipe extends into the counter bore, the left end face of the corrugated pipe is spaced from the bottom face of the counter bore by 3-5mm, a gap is formed between the outer side of the left end face of the corrugated pipe and the side wall of the counter bore, and the gap is 0.2-0.5 mm.

2. A retractable engine exhaust manifold as set forth in claim 1, wherein: the inner diameter of the flow guide pipe is the same as that of the first manifold and the second manifold.

3. A retractable engine exhaust manifold as set forth in claim 1, wherein: and a sealing gasket is arranged at the joint of the corrugated pipe and the first manifold.

4. A retractable engine exhaust manifold as set forth in claim 1, wherein: the left side of the flange sheet is a plane, and the middle part of the right side is provided with a lug which is integrally formed with the flange sheet; and the left end of the corrugated pipe is welded and fixed with the lug.

5. A retractable engine exhaust manifold as set forth in claim 1, wherein: the inner diameter of the flange sheet is the same as the diameter of the counter bore.

6. A retractable engine exhaust manifold as set forth in claim 1, wherein: the middle part of bellows is the ripple section, and both ends are equipped with straight connecting portion respectively, the transition department that honeycomb duct left end external diameter diminishes is located the middle part of bellows left end connecting portion.