CN111350579A - High-temperature sealing structure of engine exhaust pipe - Google Patents
High-temperature sealing structure of engine exhaust pipe Download PDFInfo
- Publication number
- CN111350579A CN111350579A CN202010189539.1A CN202010189539A CN111350579A CN 111350579 A CN111350579 A CN 111350579A CN 202010189539 A CN202010189539 A CN 202010189539A CN 111350579 A CN111350579 A CN 111350579A
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- Prior art keywords
- exhaust pipe
- temperature
- joint
- sealing
- sealing structure
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- 238000007789 sealing Methods 0.000 title claims abstract description 86
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 description 7
- 239000002657 fibrous material Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
- F01N13/1827—Sealings specially adapted for exhaust systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a high-temperature sealing structure of an engine exhaust pipe, which comprises a first exhaust pipe, a second exhaust pipe, an outer joint and an inner joint, wherein the outer joint is arranged at one end of the first exhaust pipe; a corrugated ring made of high-temperature-resistant steel materials and a laminated sealing ring made of high-temperature-resistant steel materials are sequentially arranged in the step hole between the outer joint and the inner joint in the axial direction along the outlet direction of the step hole, so that an end face sealing structure of the inner joint and the outer joint is formed; an annular groove is formed in the circumferential direction of the outer wall of the inner joint, and a piston sealing ring made of high-temperature-resistant steel material is arranged in the annular groove to form a radial sealing structure of the inner joint and the outer joint. The invention solves the problems of sealing rope failure and uneven high-temperature deformation gas leakage among the sections of the segmented exhaust pipe in the prior art.
Description
Technical Field
The invention relates to the field of engines, in particular to a high-temperature sealing structure of an engine exhaust pipe.
Background
The existing engine exhaust pipe mainly comprises an integral exhaust pipe and a sectional exhaust pipe, wherein the integral exhaust pipe is influenced by high temperature of engine exhaust to generate large thermal stress and thermal deformation, so that the exhaust pipe is easy to crack. At present, each engine manufacturer mostly adopts a segmented exhaust pipe to reduce the thermal stress and thermal deformation of the exhaust pipe.
As shown in fig. 1, the sealing structure 13 used for connecting the two exhaust pipes of the first exhaust pipe 11 and the second exhaust pipe 12 of the conventional engine is a sealing rope made of a high-temperature resistant fiber material, that is, each section of the sealing of the exhaust pipe of the conventional engine is sealed by using the sealing rope made of the high-temperature resistant fiber material.
The problems of the prior art are as follows:
(1) the sealing rope structure made of high-temperature resistant fiber materials cannot meet the sealing requirements, the problem of air leakage often occurs, the temperature of an exhaust pipe can reach above 700 ℃ when the engine normally works, the sealing rope made of the high-temperature resistant fiber materials cannot bear the impact of exhaust airflow due to the fact that the sealing rope is made of high-temperature resistant fiber materials, the high-temperature fibers of the sealing rope fall off under the impact action of the high-temperature exhaust airflow, the sealing rope has the problems of breakage, hollowness and the like after the engine is used for a long distance, and the sealing rope fails and exhaust gas leaks;
(2) only radial clearance sealing is adopted between the two exhaust pipes, and when the exhaust pipes are deformed unevenly due to high-temperature gas for a long time, the gas leakage phenomenon can occur.
Disclosure of Invention
Aiming at the existing defects, the invention aims to provide a high-temperature sealing structure of an engine exhaust pipe, which solves the problems of failure of sealing ropes and uneven high-temperature deformation gas leakage among sections of a segmented exhaust pipe in the prior art.
The technical scheme of the invention is as follows:
a high temperature seal structure of engine exhaust pipe which characterized in that: the exhaust pipe comprises a first exhaust pipe, a second exhaust pipe, an outer joint arranged at one end of the first exhaust pipe and an inner joint arranged at one end of the second exhaust pipe, wherein a step hole is formed in the outer joint, and the inner joint is inserted into the step hole of the outer joint in a clearance fit manner;
a corrugated ring made of high-temperature-resistant steel materials and a laminated sealing ring made of high-temperature-resistant steel materials are sequentially arranged in the step hole between the outer joint and the inner joint in the axial direction along the outlet direction of the step hole, so that an end face sealing structure of the inner joint and the outer joint is formed;
an annular groove is formed in the circumferential direction of the outer wall of the inner joint, and a piston sealing ring made of high-temperature-resistant steel material is arranged in the annular groove to form a radial sealing structure of the inner joint and the outer joint.
The sealing structure is optimized aiming at the traditional sealing structure of the engine exhaust pipe, and a form of combining end face sealing and radial sealing is adopted, namely a corrugated ring and a laminated sealing ring are arranged between an outer joint and an inner joint in the axial direction, so that the sealing effect of preventing high-temperature gas leakage is achieved; the piston sealing ring is assembled between the outer joint and the inner joint to form an interference fit sealing structure, wherein the piston sealing ring blocks the impact of exhaust airflow and blocks the exhaust leakage, the exhaust leakage leaked from the front is blocked, and the sealing effect of preventing the high-temperature gas leakage for the second time is achieved.
Specifically, the annular groove is one or more than one.
Specifically, the annular groove is twice, and the twice annular groove is parallel arrangement.
Specifically, an inner chamfer is arranged at the opening of the step hole of the outer joint.
Specifically, the inner chamfer surface is an inclined surface or an arc surface.
Compared with the prior art, the invention has the following beneficial effects:
the sealing structure of the engine exhaust pipe adopts the waveform gasket and the laminated sealing ring to carry out end face sealing, the sealing rope and the piston sealing ring are used as radial sealing, the piston sealing ring and the sealing rope are placed into the annular groove of the inner joint during assembly, and the waveform ring and the laminated sealing ring are placed into the step hole of the outer joint and then connected with the inner joint, so that the sealing surface between two sections of exhaust pipes plays a role in sealing, the sealing effect is good under the high-temperature condition, the gas is not leaked, the process operation is simple, the comprehensive cost is low, and the problem of gas leakage of connection between the sections of the engine exhaust pipe is solved.
Drawings
FIG. 1 is a schematic view of a prior art vent tube seal configuration.
Fig. 2 is a schematic view of a high-temperature sealing structure of an engine exhaust pipe according to an embodiment of the present invention.
In the figure, 11-first exhaust pipe, 12-first exhaust pipe, 13-sealing structure, 100-inner joint, 110-first ring groove, 120-second ring groove, 200-outer joint, 210-step hole, 300-wave-shaped ring, 400-laminated sealing ring, 500-first piston sealing ring, 600-second piston sealing ring.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
As shown in fig. 2, the high-temperature sealing structure of the exhaust pipe of the engine comprises an inner joint 100 arranged on one section of the exhaust pipe and an outer joint 200 arranged on the other section of the exhaust pipe, wherein the inner joint 100 and the outer joint 200 are tubular joints formed on the exhaust pipe. A step hole 210 is formed in the tubular passage of the outer joint 200; the outer wall of the inner joint 100 is circumferentially provided with ring grooves, preferably two same and parallel ring grooves in this embodiment, namely a first ring groove 110 and a second ring groove 120, which are respectively provided near the front section and the rear section, and the number of the ring grooves may be specifically arranged according to actual conditions; when the inner joint 100 is inserted into the step hole 210 of the outer joint 200 in a clearance fit manner, the corrugated ring 300 and the laminated sealing ring 400 are sequentially arranged in the step hole 210 between the outer joint 200 and the inner joint 100 in the axial direction, and the first ring groove 110 and the second ring groove 120 are respectively provided with a first piston sealing ring 500 and a second piston sealing ring 600 therein. The corrugated ring 300, the laminated sealing ring 400, the first piston sealing ring 500 and the second piston sealing ring 600 are all made of high-temperature-resistant steel materials. The high-temperature resistant steel material has good stability and can not deform and damage at the high temperature of 780 ℃.
The sealing principle of the exhaust pipe sealing structure of the embodiment is as follows: the present embodiment adopts a form of combining end face sealing and radial sealing, i.e. the corrugated ring 300 and the laminated sealing ring 400 are arranged between the outer joint 200 and the inner joint 100 in the axial direction, so as to play a first sealing role in preventing high-temperature gas leakage; the piston sealing rings 500 and the sealing ropes 600 are assembled between the radial gaps of the outer joint 200 and the inner joint 100 to enable the inner joint and the outer joint to form a sealing structure in interference fit, wherein the two piston sealing rings block the impact of exhaust airflow and prevent the exhaust from leaking outwards, and the sealing effect of preventing high-temperature gas from leaking is achieved, so that the radial gap and the axial gap between the two sections of exhaust pipes are sealed in a double mode, and the effect that the whole exhaust pipe is good in sealing effect under the high-temperature condition is achieved. During assembly, the first piston sealing ring 500 and the second piston sealing ring 600 are only required to be placed into the first ring groove 110 and the second ring groove 120 of the inner joint 100, the corrugated ring 300 and the laminated sealing ring 400 are placed into the step hole 210 of the outer joint 200 and then connected with the inner joint 100, the process operation is simple, the comprehensive cost is low, the problems that after the engine exhaust pipe in the prior art is used for a long distance, the sealing rope is broken, hollow, the sealing rope fails, exhaust gas leaks and the like are solved, and the purpose is achieved.
As a preferable scheme of this embodiment, an inner chamfer is provided at an opening of the step hole 210 of the outer joint 200, and a chamfer surface of the inner chamfer may be an inclined surface or an arc surface, so that the inner joint 100 can be conveniently inserted into the step hole 210 of the outer joint 200 along the inner chamfer thereof.
Although the invention has been described in detail above with reference to specific embodiments, it will be apparent to one skilled in the art that modifications or improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. A high temperature seal structure of engine exhaust pipe which characterized in that: the exhaust pipe comprises a first exhaust pipe, a second exhaust pipe, an outer joint arranged at one end of the first exhaust pipe and an inner joint arranged at one end of the second exhaust pipe, wherein a step hole is formed in the outer joint, and the inner joint is inserted into the step hole of the outer joint in a clearance fit manner;
a corrugated ring made of high-temperature-resistant steel materials and a laminated sealing ring made of high-temperature-resistant steel materials are sequentially arranged in the step hole between the outer joint and the inner joint in the axial direction along the outlet direction of the step hole, so that an end face sealing structure of the inner joint and the outer joint is formed;
an annular groove is formed in the circumferential direction of the outer wall of the inner joint, and a piston sealing ring made of high-temperature-resistant steel material is arranged in the annular groove to form a radial sealing structure of the inner joint and the outer joint.
2. The high-temperature sealing structure of the engine exhaust pipe according to claim 1, wherein the ring groove is one or more than one.
3. The high-temperature sealing structure of the engine exhaust pipe according to claim 2, wherein the ring grooves are formed in two ways, and the two ways are arranged in parallel.
4. The high-temperature sealing structure of the engine exhaust pipe according to claim 1, characterized in that: an inner chamfer is arranged at the opening of the step hole of the outer joint.
5. The high-temperature sealing structure of the engine exhaust pipe according to claim 5, wherein the inner chamfered surface is a slope or an arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010189539.1A CN111350579A (en) | 2020-03-18 | 2020-03-18 | High-temperature sealing structure of engine exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010189539.1A CN111350579A (en) | 2020-03-18 | 2020-03-18 | High-temperature sealing structure of engine exhaust pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111350579A true CN111350579A (en) | 2020-06-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010189539.1A Pending CN111350579A (en) | 2020-03-18 | 2020-03-18 | High-temperature sealing structure of engine exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111350579A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878208A (en) * | 2020-08-28 | 2020-11-03 | 广西玉柴机器股份有限公司 | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas |
| CN112012800A (en) * | 2020-08-18 | 2020-12-01 | 清华大学 | Seal structure of grid tray and braid combination |
| CN114017171A (en) * | 2021-10-26 | 2022-02-08 | 东风商用车有限公司 | Exhaust pipe sealing structure |
| CN114542255A (en) * | 2022-03-09 | 2022-05-27 | 广西玉柴机器股份有限公司 | Novel multi-section exhaust pipe connecting and sealing structure |
| CN115095727A (en) * | 2022-06-21 | 2022-09-23 | 中国北方发动机研究所(天津) | Combined sealing structure based on multistage flow damping |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202732073U (en) * | 2012-09-17 | 2013-02-13 | 潍柴动力股份有限公司 | Sealing structure of split-type exhaust manifold |
| CN107165712A (en) * | 2017-07-13 | 2017-09-15 | 广西玉柴机器股份有限公司 | Engine is segmented the connection sealing structure of blast pipe |
| CN212337421U (en) * | 2020-03-18 | 2021-01-12 | 广西玉柴机器股份有限公司 | High-temperature sealing structure of engine exhaust pipe |
-
2020
- 2020-03-18 CN CN202010189539.1A patent/CN111350579A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202732073U (en) * | 2012-09-17 | 2013-02-13 | 潍柴动力股份有限公司 | Sealing structure of split-type exhaust manifold |
| CN107165712A (en) * | 2017-07-13 | 2017-09-15 | 广西玉柴机器股份有限公司 | Engine is segmented the connection sealing structure of blast pipe |
| CN212337421U (en) * | 2020-03-18 | 2021-01-12 | 广西玉柴机器股份有限公司 | High-temperature sealing structure of engine exhaust pipe |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012800A (en) * | 2020-08-18 | 2020-12-01 | 清华大学 | Seal structure of grid tray and braid combination |
| CN111878208A (en) * | 2020-08-28 | 2020-11-03 | 广西玉柴机器股份有限公司 | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas |
| CN114017171A (en) * | 2021-10-26 | 2022-02-08 | 东风商用车有限公司 | Exhaust pipe sealing structure |
| CN114542255A (en) * | 2022-03-09 | 2022-05-27 | 广西玉柴机器股份有限公司 | Novel multi-section exhaust pipe connecting and sealing structure |
| CN115095727A (en) * | 2022-06-21 | 2022-09-23 | 中国北方发动机研究所(天津) | Combined sealing structure based on multistage flow damping |
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