CN211874581U

CN211874581U - Exhaust bellows assembly and vehicle

Info

Publication number: CN211874581U
Application number: CN202020297556.2U
Authority: CN
Inventors: 张宁; 谢钊毅; 张新宇; 张凯; 曾志新
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-11-06
Anticipated expiration: 2030-03-11

Abstract

The utility model provides an exhaust corrugated pipe assembly, which comprises a corrugated pipe, a connecting pipe embedded in the corrugated pipe and a damping washer sleeved on a corrugated section, wherein the corrugated pipe comprises the corrugated section and connecting sections arranged at two ends of the corrugated section; the air inlet end of the connecting pipe is fastened with one end of the connecting section, and the air outlet end of the connecting pipe is suspended in the corrugated pipe; the two ends of the exhaust corrugated pipe assembly are sleeved on the exhaust pipeline at the outlet of the supercharger and are tightly welded with the exhaust pipeline at the outlet of the supercharger in a coupling mode. The corrugated section of the corrugated pipe absorbs high-frequency excitation impact, the damping gasket vibrates at high frequency and low amplitude in the surface clearance of the corrugated section of the corrugated pipe, and high-frequency excitation energy absorbed by the corrugated section is consumed, so that the high-frequency vibration and noise excitation of the exhaust system are attenuated, the vibration noise attenuation frequency of the exhaust corrugated pipe assembly is improved from the traditional frequency of below 200Hz to 1000 plus 20000Hz or even higher, and the exhaust corrugated pipe assembly is suitable for the exhaust system of a vehicle model of an engine with a supercharger.

Description

Exhaust bellows assembly and vehicle

Technical Field

The utility model belongs to vehicle exhaust system field especially relates to exhaust bellows assembly and vehicle.

Background

The exhaust system is an important component of an internal combustion engine automobile and is responsible for emission and noise reduction. The exhaust bellows assembly is a flexible component in an exhaust system, is generally arranged in an exhaust pipeline assembly, and has the functions of damping vibration transmission, reducing noise and absorbing large-angle displacement.

The existing exhaust corrugated pipe assembly comprises an end ring, an inner lining pipe, a corrugated pipe and a silk screen, wherein the inner lining pipe is embedded in the corrugated pipe, the silk screen is sleeved outside the corrugated pipe, and the end ring is sleeved at the end part of the corrugated pipe and used for being connected with an exhaust pipeline. When the automobile runs, the exhaust corrugated pipe assembly flexibly deforms by itself to absorb low-frequency large-angle deformation (below 50 Hz) and high-frequency engine vibration (below 200 Hz) caused by road surface excitation or engine torsion. In general, the existing exhaust corrugated pipe structure has a remarkable damping effect on vibration excitation below 200 Hz.

However, for the vehicle type of the engine with the supercharger, the rotating speed range of the supercharger is thousands to hundreds of thousands of revolutions per minute, the highest rotating speed range can even reach 20 thousands of revolutions per minute, the corresponding first-order vibration frequency is also between thousands of Hz and hundreds of thousands of Hz, and for the vibration excitation problem of the high frequency, the existing exhaust bellows assembly cannot play an obvious role in attenuation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the problem that the existing scheme cannot obviously attenuate the high-frequency vibration excitation of a vehicle type of an engine with a supercharger is solved.

In order to solve the above technical problem, an embodiment of the present invention provides an exhaust bellows assembly, including a bellows, a connecting pipe embedded in the bellows, and a damping washer sleeved on the bellows;

the corrugated pipe comprises a corrugated section and connecting sections arranged at two ends of the corrugated section;

the air inlet end of the connecting pipe is fastened with one end of the connecting section, and the air outlet end of the connecting pipe is suspended in the corrugated pipe;

and two ends of the exhaust corrugated pipe assembly are used for being connected to an exhaust pipeline at the outlet of the supercharger.

Optionally, the damping washer is a stainless steel wire loop.

Optionally, the single edge thickness of the damping washer is 5 ± 1 mm.

Optionally, the number of corrugations of the corrugated section is 3-5.

Optionally, the corrugated pipe is a three-layer stainless steel pipe body composite forming piece, and the thickness of the single-layer stainless steel pipe body is 0.3-0.5 mm.

Optionally, the connecting pipe is a stainless steel round pipe with a thickness of 0.5-1 mm.

An embodiment of the utility model provides a vehicle is still provided, including aforementioned exhaust bellows assembly, exhaust bellows assembly's both ends overlap in on the booster export exhaust pipe way to tightly coupled ground with booster export exhaust pipe welds.

The embodiment of the utility model provides an exhaust bellows assembly and vehicle, replaced the silk screen that the cover located the bellows outside with the damping packing ring, booster export high frequency mechanical shock and air current impact through the exhaust bellows assembly, the ripple section of bellows absorbs the high frequency excitation and assaults, the damping packing ring is at the low amplitude vibration of surface clearance high frequency of the ripple section of bellows, consume the high frequency excitation energy that the ripple section was absorbed, thereby realize exhaust system high frequency vibration and noise excitation's decay, promote below traditional 200Hz to 1000 with exhaust bellows assembly vibration noise decay frequency and 20000Hz even higher, can effectively realize the exhaust system's to the motorcycle type of the engine that has the booster high frequency vibration and noise excitation's decay.

Drawings

Fig. 1 is a schematic structural diagram of an exhaust bellows assembly according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic structural view of the bellows of FIG. 2;

FIG. 4 is a schematic view of the damping washer of FIG. 2;

fig. 5 is a reference diagram of a usage state of the exhaust bellows assembly according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. a bellows; 11. a corrugated section; 12. a connecting section;

2. a connecting pipe; 3. a damping washer; 4. and an exhaust pipeline at the outlet of the supercharger.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1 to 2, an exhaust bellows assembly according to an embodiment of the present invention includes a bellows 1, a connecting pipe 2 embedded in the bellows 1, and a damping washer 3 sleeved on a bellows segment 11;

the corrugated pipe 1 comprises a corrugated section 11 and connecting sections 12 arranged at two ends of the corrugated section 11;

the air inlet end of the connecting pipe 2 is fastened with one end of the connecting section 12, and the air outlet end of the connecting pipe 2 is suspended in the corrugated pipe 1.

In use, as shown in fig. 5, both ends of the exhaust bellows assembly are connected to the supercharger outlet exhaust duct 4, two large arrows in fig. 5 indicate the outflow direction of the exhaust gas flow, and a small arrow indicates the vibration direction of the supercharger outlet exhaust duct 4 and the exhaust bellows assembly.

The specific assembly process can be as follows: sleeving a damping washer 3 on the surface of a corrugated section 11 of a corrugated pipe 1 to form a combination A, embedding a connecting pipe 2 into the combination A to form a combination B, and completing preassembly; and then, integrally flaring a port of the combination B from inside to outside, so that the air inlet end of the connecting pipe 2 and one end of the connecting section 12 are integrally flared, deformed and fastened, and the assembly of the exhaust corrugated pipe assembly is completed.

The embodiment of the utility model provides an exhaust bellows assembly, compared with the prior art, the silk screen outside the bellows is located to the cover has been replaced with damping packing ring 3, booster export high frequency mechanical shock and air current impact process exhaust bellows assembly, 11 absorption high frequency excitation impact of ripple section of bellows 1, damping packing ring 3 is in the low amplitude vibration of surface clearance high frequency of ripple section 11 of bellows 1, consume 11 absorptive high frequency excitation energy of ripple section, thereby realize exhaust system high frequency vibration and noise excitation's decay, promote below traditional 200Hz to 1000 with exhaust bellows assembly vibration noise decay frequency and 20000Hz or even higher, can effectively realize the high frequency vibration and the noise excitation's of exhaust system to the motorcycle type of the engine that has the booster decay. The connecting pipe 2 guides high-temperature exhaust airflow to smoothly flow out, prevents the airflow from directly impacting and contacting the corrugated pipe 1 to form local turbulence in the corrugated cavity, reduces the noise of the airflow, can properly reduce the working temperature of the corrugated pipe 1, and prolongs the service life of the exhaust corrugated pipe assembly.

Preferably, as shown in fig. 2, the air outlet end of the connecting pipe 2 is suspended in the connecting pipe 2, so as to completely shield the inner side of the corrugated section 11, prevent the air flow from directly impacting and contacting the corrugated section 11, and better reduce the noise of the air flow.

In an embodiment, as shown in fig. 2 to 4, the damping washer 3 is a profiling die-formed part of a stainless steel wire ring, and a compact stainless steel wire ring can be obtained by die-forming, so as to meet the requirement of heat resistance, compared with the existing wire mesh which has negligible thickness and mass and only plays a role of connection and is sleeved outside the corrugated pipe 1, the damping washer 3 has a certain thickness and mass, and can absorb excitation energy through damping, and meanwhile, when the damping washer 3 is sheathed on the surface of the corrugated section 11 in a profiling manner, the damping washer 3 is better attached to the corrugated section 11, so that the damping washer is more beneficial to consuming high-frequency excitation energy absorbed by the corrugated section 11. Stainless steel wire rings with high light weight and good heat resistance are preferred.

In one embodiment, the single-side thickness of the damping washer 3 is 5 +/-1 mm, so that the capability of absorbing the excitation energy can be improved by increasing the damping, and the phenomenon that the excitation cannot be realized due to over thickness to influence the capability of absorbing the excitation energy is avoided.

Specifically, the diameter of the single steel wires of the damping washer 3 may be 0.3 ± 0.1 mm.

In an embodiment, as shown in fig. 2 and 3, the number of corrugations of the corrugated section 11 is 3-5, and is reduced to 3-5 from the conventional number of corrugations of more than 20, so that the axial length of the corrugated pipe 1 is reduced, and the corrugated pipe 1 is suitable for spatial arrangement of an exhaust pipeline at an outlet section of a tightly coupled supercharger, and also is suitable for improving the rigidity of the corrugated pipe 1, improving the resonance frequency and adapting to high-frequency impact.

In one embodiment, the corrugated pipe 1 is a composite molded article of three layers of stainless steel pipes, and the thickness of a single layer of stainless steel pipe is 0.3-0.5 mm. The corrugated pipe meets the heat-resistant requirement, has higher rigidity and small elasticity compared with the corrugated pipe 1 which is formed by compounding two layers of stainless steel pipes with the thickness of 0.15-0.2mm, improves the resonance frequency and adapts to high-frequency impact.

In one embodiment, the connecting pipe 2 is a stainless steel round pipe, the thickness of the connecting pipe is 0.5-1mm, the heat-resistant requirement is met, the shape and the thickness of the connecting pipe 2 are basically consistent with those of an exhaust pipeline at an outlet section of the supercharger, and high-temperature exhaust airflow is guided to smoothly flow out.

The embodiment of the utility model provides a vehicle is still provided, including the exhaust bellows assembly that any preceding embodiment mentioned, the both ends of exhaust bellows assembly overlap on booster export exhaust pipe 4 to tightly couple ground and the welding of booster export exhaust pipe 4. When the engine works, the exhaust corrugated pipe assembly flexibly deforms by itself to absorb low-frequency large-angle deformation and high-frequency engine vibration.

Specifically, as shown in fig. 5, at the intake end of the exhaust bellows assembly: the inner peripheral wall of the corrugated pipe 1 and the air inlet end of the connecting pipe 2 are both welded with an exhaust pipeline 4 at the outlet of the supercharger; at the air outlet end of the exhaust corrugated pipe assembly: the inner peripheral wall of the corrugated pipe 1 is welded with a supercharger outlet exhaust pipeline 4, and the connecting pipe 2 is separated from the supercharger outlet exhaust pipeline 4. The reliable connection of exhaust bellows assembly and booster export exhaust pipe 4 is guaranteed, the inlet end of connecting pipe 2 is fixed with linkage segment 12 and booster export exhaust pipe 4, and the end of giving vent to anger of connecting pipe 2 keeps free state, avoids influencing the deformability of bellows 1.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An exhaust corrugated pipe assembly comprises a corrugated pipe, wherein the corrugated pipe comprises a corrugated section and connecting sections arranged at two ends of the corrugated section; the method is characterized in that: the corrugated pipe is characterized by also comprising a connecting pipe embedded in the corrugated pipe and a damping gasket sleeved on the corrugated section;

2. The exhaust bellows assembly of claim 1, wherein: the damping washer is a stainless steel wire ring.

3. The exhaust bellows assembly of claim 2, wherein: the unilateral thickness of damping packing ring is 5 ± 1 mm.

4. The exhaust bellows assembly of claim 1, wherein: the number of the corrugations of the corrugated section is 3-5.

5. The exhaust bellows assembly of claim 1, wherein: the corrugated pipe is a three-layer stainless steel pipe body composite forming piece, and the thickness of a single-layer stainless steel pipe body is 0.3-0.5 mm.

6. The exhaust bellows assembly of claim 1, wherein: the connecting pipe is a stainless steel round pipe, and the thickness of the connecting pipe is 0.5-1 mm.

7. A vehicle, characterized in that: the exhaust corrugated pipe assembly comprises the exhaust corrugated pipe assembly as claimed in any one of claims 1 to 6, wherein two ends of the exhaust corrugated pipe assembly are sleeved on the supercharger outlet exhaust pipeline and are tightly coupled and welded with the supercharger outlet exhaust pipeline.