CN214616731U

CN214616731U - Light expansion joint for exhaust pipe of vehicle engine

Info

Publication number: CN214616731U
Application number: CN202120905238.4U
Authority: CN
Inventors: 李亮; 韩晓娟; 王殿钧; 王莹; 卢衷正; 高鹏飞; 周家俊
Original assignee: Shenyang Aerosun Futai Expansion Joint Co ltd
Current assignee: Shenyang Aerosun Futai Expansion Joint Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-05
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a light-weight expansion joint for vehicle engine exhaust pipe, including the draft tube, the outer wall of draft tube is cup jointed with the bellows structure, the bellows structure with one side of draft tube all is connected with the takeover through the second welding ring, the opposite side of bellows structure is connected with the flange through first welding ring, flange and takeover adopt lightweight material aluminum alloy, have reduced product weight to reach the effect that the cost reduction promotes product performance, cancel the structure of left side flange and takeover assembly welding, change flange and bellows direct welding into, have reduced takeover spare part, reduce the product dead weight; the waveform parameters of the corrugated pipe are changed, the fatigue life of the product is prolonged, and the wall thickness of the corrugated pipe can be reduced under the same fatigue life requirement; the flaring type is selected for use to the takeover, cancels integral type thick wall structural style, when satisfying the pipeline installation demand, has reduced the product dead weight.

Description

Light expansion joint for exhaust pipe of vehicle engine

Technical Field

The utility model relates to a vehicle engine blast pipe technical field, specific field is a light-weight expansion joint for vehicle engine blast pipe.

Background

With the rapid development of the vehicle industry, the metal corrugated pipe has been widely applied to the vehicle engine, bears the large alternating stress generated by the asynchronous vibration of the engine and the vehicle, and plays a good role in the aspects of vibration reduction and thermal compensation of the exhaust system. On the premise of ensuring the comprehensive performance indexes of the vehicle exhaust pipe system such as strength, safety, reliability and the like, the vehicle exhaust pipe system has the advantages of considering both quality and performance, and reducing the weight of each part of the pipe system to the maximum extent, and is the trend of the development of the current vehicles.

The light weight is an index for performance assessment of future vehicles, which is a true principle of the vehicle field, and as long as your vehicle is light enough, the performance of the vehicle is strong enough. The principle is also applicable to trucks, if your truck can be light enough, it can be enough fuel-efficient, can also load more goods, and handling performance also can promote along with it, and undoubtedly, lightweight has become the trend of vehicle development.

The expansion joint product for the exhaust pipe of the vehicle engine is generally composed of structural components such as a flange, an end pipe, a corrugated pipe, a guide cylinder and the like, and is used for eliminating the axial and radial thermal expansion and deformation of the exhaust pipe, improving the sealing reliability and preventing the leakage of the exhaust pipe system. The compensation amount of the expansion joint is required to be within less than or equal to 10mm in the axial direction, less than or equal to 10mm in the radial direction, the product caliber is DN 50-DN 150, and the fatigue life is required to be more than 5000 times.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vehicle engine is lightweight expansion joint for blast pipe to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a vehicle engine is lightweight expansion joint for blast pipe, includes the draft tube, the outer wall of draft tube is cup jointed with bellows structure, bellows structure with one side of draft tube all welds the ring through the second and is connected with the takeover, the opposite side of bellows structure is connected with the flange through first welding ring.

Preferably, the bellows structure comprises a plurality of peaks and a plurality of valleys, the plurality of peaks being alternately connected to the plurality of planes and the plurality of valleys.

Preferably, the plane forms a right or acute angle with the axis.

Preferably, the plane forms a right angle with the axis, namely the plane between the wave crest and the wave trough is vertical, and is a U-shaped corrugated pipe.

Preferably, the plane forms an acute angle with the axis, namely, the plane between the wave crest and the wave trough is inclined, and the corrugated pipe is S-shaped.

Preferably, the flange and the connecting pipe are made of aluminum alloy light materials.

Preferably, the structure form of the connecting pipe is a flaring type.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the flange and the connecting pipe are made of light aluminum alloy, so that the weight of the product is reduced, and the effects of reducing cost and improving the performance of the product are achieved;

2. the structure of assembling and welding the left flange and the connecting pipe is eliminated, and the flange and the corrugated pipe are directly welded instead, so that connecting pipe parts are reduced, and the self weight of the product is reduced;

3. the waveform parameters of the corrugated pipe are changed, the fatigue life of the product is prolonged, and the wall thickness of the corrugated pipe can be reduced under the same fatigue life requirement;

4. the connecting pipe is in a flaring type, an integral thick-wall structure is omitted, the pipeline installation requirement is met, and the self weight of the product is reduced;

5. the guide cylinder is made of a novel composite material and has high specific strength, high temperature resistance, corrosion resistance and thermal shock resistance.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of embodiment 1 of the present invention;

fig. 3 is a schematic structural view of embodiment 2 of the present invention.

In the figure: 1-flange, 2-first welding ring, 3-corrugated pipe structure, 31-wave crest, 32-wave trough, 4-guide shell, 5-connecting pipe and 6-second welding ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: including draft tube 4, the outer wall of draft tube 4 cup joints bellows structure 3, and bellows structure 3 and one side of draft tube 4 all are connected with through second welding ring 6 and take over 5, and bellows structure 3's opposite side is connected with flange 1 through first welding ring 2.

On the premise of not changing the rigidity and the strength of the exhaust pipeline, the weight of the pipeline is reduced as much as possible, and the flange 1 and the connecting pipe 5 are made of light materials, such as alloy materials, so that a good weight reduction scheme is provided; the original connecting pipe 5 is omitted on the left side of the expansion joint, and two waves are added to the corrugated pipe structure 3 to ensure the total length of the product, so that the expansion joint is also a weight reduction scheme; the right-side connecting pipe 5 is in a flaring type, so that the connection of pipelines with different calibers at two ends of the connecting pipe 5 can be met, and meanwhile, the original thick-wall connecting pipe 5 can be optimized, and the weight is reduced; the expansion joint selects the S-shaped bellows for use, when increasing the pipeline flexibility, has improved product fatigue life, and under equal fatigue life requirement, the bellows wall thickness can reduce, and first weld ring 2 and second weld ring 6 and can guarantee that product joint strength is bigger, and the linking effect is good, and the draft tube selects for use novel combined material, has high specific strength, high temperature resistant, corrosion-resistant, thermal shock resistance.

Specifically, the bellows structure 3 includes a plurality of peaks 31 and a plurality of valleys 32, and the plurality of peaks 31 are alternately connected with a plurality of planes and the plurality of valleys 32.

In particular, the plane forms a right or acute angle with the axis.

The form of the formed bellows is different according to the included angle.

Specifically, the plane forming a right angle with the axis, i.e. the plane between the wave crest 31 and the wave trough 32 is perpendicular, and is a U-shaped corrugated pipe.

The U-shaped corrugated pipe can ensure the enhancement of the overall stability and the service life of the corrugated pipe.

Specifically, the flange 1 is an aluminum alloy light flange 1, and the connecting pipe 5 is an aluminum alloy light connecting pipe 5.

The flange 1 and the connecting pipe 5 are made of light materials, for example, alloy materials are good weight reduction schemes, and the alloy materials can be aluminum alloys

Specifically, the adapter tube 5 is in the form of a flared structure.

The right-side connecting pipe 5 is provided with a flaring opening, so that the connection of pipelines with different calibers at two ends of the connecting pipe 5 can be met, and the original thick-wall connecting pipe 5 can be optimized to reduce the weight.

The working principle is as follows: on the premise of not changing the rigidity and the strength of the exhaust pipeline, the weight of the pipeline is reduced as much as possible, and the flange 1 and the connecting pipe 5 are made of light materials, such as alloy materials, so that a good weight reduction scheme is provided; the original connecting pipe 5 is omitted on the left side of the expansion joint, and two waves are added to the corrugated pipe structure 3 to ensure the total length of the product, so that the expansion joint is also a weight reduction scheme; the right-side connecting pipe 5 is in a flaring type, so that the connection of pipelines with different calibers at two ends of the connecting pipe 5 can be met, and meanwhile, the original thick-wall connecting pipe 5 can be optimized, and the weight is reduced; the expansion joint uses the U-shaped bellows, has improved product fatigue life, and under the equal fatigue life requirement, the bellows wall thickness can reduce, and first welding ring 2 and second welding ring 6 can guarantee that product joint strength is bigger, and the linking effect is good, and novel combined material is selected for use to the draft tube, has high specific strength, high temperature resistant, corrosion-resistant, thermal shock resistance performance embodiment 2

In particular, the plane forms a right or acute angle with the axis.

The difference from example 1 is that: the plane forming an acute angle with the axis, i.e. the plane between the wave crest 31 and the wave trough 32 is inclined, and is an S-shaped corrugated pipe.

The S-shaped corrugated pipe improves the fatigue life of the product while increasing the flexibility of the pipeline, and the wall thickness of the corrugated pipe can be reduced under the same fatigue life requirement.

The working principle is as follows: on the premise of not changing the rigidity and the strength of the exhaust pipeline, the weight of the pipeline is reduced as much as possible, and the flange 1 and the connecting pipe 5 are made of light materials, such as alloy materials, so that a good weight reduction scheme is provided; the original connecting pipe 5 is omitted on the left side of the expansion joint, and two waves are added to the corrugated pipe structure 3 to ensure the total length of the product, so that the expansion joint is also a weight reduction scheme; flaring formula is selected for use to right side takeover 5, can satisfy the connection of 5 both ends different bore pipelines of takeover, 5 optimization are taken over to the thick wall that also can be originally simultaneously, reduce the weight bellows and select S-shaped bellows for use, the flexibility reinforcing of S-shaped bellows, the displacement compensation ability increases, fatigue life number of times is high, adaptability to abominable service environment is stronger, the used flange of this expansion joint and takeover are lightweight material, and takeover 5 designs for the flaring formula, original integral type thick wall takeover form has been cancelled, these all greatly reduced the weight of expansion joint.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses the standard part that uses all can purchase from the market, and the profile shapes all can be customized according to the record of description and attached drawing, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and setting are equipped with and all adopt prior art, and conventional model is including the conventional connected mode among the circuit connection adoption prior art, and here detailed description is not repeated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a light-weight expansion joint for vehicle engine exhaust pipe which characterized in that: including draft tube (4), the outer wall of draft tube (4) is cup jointed bellows structure (3), bellows structure (3) with one side of draft tube (4) all is connected with through second welding ring (6) and takes over (5), the opposite side of bellows structure (3) is connected with flange (1) through first welding ring (2).

2. The light-weight expansion joint for the exhaust pipe of the vehicle engine according to claim 1, characterized in that: the bellows structure (3) comprises a plurality of crests (31) and a plurality of troughs (32), the plurality of crests (31) being alternately connected to the plurality of planes and the plurality of troughs (32).

3. The light-weight expansion joint for the exhaust pipe of the vehicle engine as set forth in claim 2, wherein: the plane forms a right or acute angle with the axis.

4. The light-weight expansion joint for the exhaust pipe of the vehicle engine as set forth in claim 3, wherein: the plane and the axis form a right angle, namely the plane between the wave crest (31) and the wave trough (32) is vertical, and the corrugated pipe is U-shaped.

5. The light-weight expansion joint for the exhaust pipe of the vehicle engine as set forth in claim 3, wherein: the plane and the axis form an acute angle, namely the plane between the wave crest (31) and the wave trough (32) is inclined, and the corrugated pipe is S-shaped.

6. The light-weight expansion joint for the exhaust pipe of the vehicle engine according to claim 1, characterized in that: the flange (1) adopts an aluminum alloy light flange (1), and the connecting pipe (5) adopts an aluminum alloy light connecting pipe (5).

7. The light-weight expansion joint for the exhaust pipe of the vehicle engine according to claim 1, characterized in that: the structure form of the connecting pipe (5) is a flaring type.