CN111878208A - Exhaust pipe sealing structure capable of effectively sealing high-temperature gas - Google Patents
Exhaust pipe sealing structure capable of effectively sealing high-temperature gas Download PDFInfo
- Publication number
- CN111878208A CN111878208A CN202010885473.XA CN202010885473A CN111878208A CN 111878208 A CN111878208 A CN 111878208A CN 202010885473 A CN202010885473 A CN 202010885473A CN 111878208 A CN111878208 A CN 111878208A
- Authority
- CN
- China
- Prior art keywords
- sealing
- exhaust
- temperature gas
- sealing ring
- exhaust pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 106
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses an exhaust pipe sealing structure for effectively sealing high-temperature gas, which comprises a plurality of exhaust branch pipes which are spliced in pairs, wherein one end of each exhaust branch pipe is provided with a connecting hole, the other end of each exhaust branch pipe is provided with a connecting section matched with the connecting hole, the connecting section is provided with at least two sealing grooves, and each sealing groove is provided with a sealing ring. The exhaust pipe sealing structure for effectively sealing high-temperature gas has reasonable structural design, belongs to the technical field of engine exhaust, and is characterized in that the joint of a sectional exhaust pipe is sealed by at least two sealing rings, and a roundabout labyrinth flow passage blocks the high-temperature gas; and high temperature exhaust can make the sealing ring take place the inflation, and the sealing ring receives thrust under the exhaust backpressure and overcomes the frictional force with the exhaust branch pipe pore wall, compresses tightly to the seal groove terminal surface and realizes terminal surface and radial seal, reaches high temperature gas's sealed effect.
Description
Technical Field
The invention relates to an engine exhaust technology, in particular to an exhaust pipe sealing structure for effectively sealing high-temperature gas.
Background
In engines with six or more cylinders and turbocharging, a segmented exhaust pipe is commonly used. Because of the sectional structure, the increase of the sealing structure is required to be considered between the exhaust branch pipes, generally, the sealing rope structure is adopted at the joint of the two branch pipes for sealing, for example: the butt joints of the first branch pipe and the second branch pipe and the butt joints of the second branch pipe and the third branch pipe are in butt joint through hole shafts, sealing ropes are placed in grooves on the shafts to be sealed, and under the heating of exhaust temperature, materials in the sealing ropes expand by heating to realize the sealing of exhaust.
However, due to the upgrading of the emission standard and the adjustment of the combustion strategy, the original exhaust temperature of the gas engine is increased from about 670 ℃ to about 760 ℃. The high temperature discharge factor is the same, the outer protective layer of the sealing rope is limited by the selected material, the high temperature resistance is insufficient, the original sealing rope fails under high-temperature gas, the sealing failure between the branch pipes and the gas leakage are easy to occur, and the performance and the environment pollution are influenced.
Disclosure of Invention
The present invention is directed to solve some of the above-mentioned disadvantages of the prior art, and an object of the present invention is to provide a sealing structure for an exhaust pipe, which has good sealing performance and is capable of effectively sealing high-temperature gas.
In order to achieve the purpose, the invention provides an exhaust pipe sealing structure for effectively sealing high-temperature gas, which comprises a plurality of exhaust branch pipes which are spliced in pairs, wherein one end of each exhaust branch pipe is provided with a connecting hole, the other end of each exhaust branch pipe is provided with a connecting section matched with the connecting hole, the connecting section is provided with at least two sealing grooves, and each sealing groove is provided with a sealing ring.
Further, the seal groove extends circumferentially on the outer wall of the connecting section.
Further, the sealing ring is of an alloy structure.
Further, the outer diameter of the sealing ring is larger than the inner diameter of the connecting hole.
As a further improvement, the inner diameter of the sealing ring is larger than the diameter of the groove bottom of the sealing groove.
Advantageous effects
Compared with the prior art, the exhaust pipe sealing structure for effectively sealing high-temperature gas has the following beneficial effects:
1) according to the exhaust pipe sealing structure for effectively sealing high-temperature gas, the joint of the sectional exhaust pipe is sealed by adopting at least two sealing rings, and the high-temperature gas is blocked by the roundabout labyrinth flow channel; moreover, the sealing ring expands due to high-temperature exhaust, and the sealing ring is pressed against the end face of the sealing groove to realize end face and radial sealing under exhaust back pressure by the thrust to overcome the friction force with the wall of the exhaust branch pipe, so that the sealing effect of high-temperature gas is achieved;
2) the exhaust pipe sealing structure for effectively sealing high-temperature gas can reliably block the high-temperature gas, effectively prevent exhaust leakage, solve the long-standing gas leakage fault troubled by the high exhaust temperature of a natural gas engine, and solve the problems of insufficient supercharging pressure of an engine supercharger, abnormal EGR rate and atmosphere pollution caused by waste gas due to gas leakage.
Drawings
FIG. 1 is a schematic structural view of an exhaust pipe sealing structure of the present invention for effectively sealing high-temperature gas;
fig. 2 is an enlarged schematic view of the structure at a in fig. 1.
In the figure: 1. an exhaust branch pipe; 2. connecting holes; 3. a connecting section; 4. a sealing groove; 5. and (4) a sealing ring.
Detailed description of the preferred embodiments
The invention is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.
Specific embodiments of the present invention are such that: referring to fig. 1-2, an exhaust pipe sealing structure for effectively sealing high-temperature gas includes a plurality of exhaust branch pipes 1 which are connected in pairs, a connecting hole 2 is formed in one end of each exhaust branch pipe 1, a connecting section 3 which is matched with the connecting hole 2 is formed in the other end of each exhaust branch pipe 1, the connecting section 3 and the connecting hole 2 are in transition or interference fit (a gap is formed between the connecting hole 2 and the connecting section 3 shown in fig. 1 and 2 to distinguish the connecting hole 2 from the connecting section 3), at least two sealing grooves 4 are formed in the connecting section 3, the sealing grooves 4 extend in the circumferential direction on the outer wall of the connecting section 3, and sealing rings 5 are arranged on the sealing grooves 4. In the exhaust pipe sealing structure for effectively sealing high-temperature gas, at least two sealing rings 5 are arranged in a sealing groove 4 for sealing, so that a circuitous labyrinth flow passage is formed between the outer wall of a connecting section 3 and the hole wall of a connecting hole 2, and the high-temperature gas is blocked; moreover, the sealing ring 5 expands due to high-temperature exhaust, the sealing ring 5 is pushed under the exhaust back pressure to overcome the friction force with the hole wall of the exhaust branch pipe 1, and the sealing ring is pressed against the end face of the sealing groove 4 to realize end face and radial sealing, so that the sealing effect of high-temperature gas is achieved.
In the exhaust pipe sealing structure for effectively sealing high-temperature gas, the sealing principle of the sealing ring 5 is labyrinth, end face and radial sealing; the structure that sets up two seal grooves 4 and double seal ring 5 forms the gaseous power of advancing of strenghthened type maze consumption, and when the engine was in operation, seal ring 5 received thrust under exhaust back pressure and overcome the frictional force with the blast pipe pore wall, compressed tightly to 4 terminal surfaces of seal groove and realized terminal surface and radial seal simultaneously. Finally, the sealing effect of high-temperature gas is achieved through the combination of the two items.
In the embodiment, the sealing ring 5 is an alloy structure, is resistant to high temperature, has high yield strength and endurance and creep strength at high temperature, and has better processing plasticity.
In this embodiment, the outer diameter of the sealing ring 5 is slightly larger than the inner diameter of the connecting hole 2, and the sealing ring 5 is in interference fit with the connecting hole 2, so that after the connecting section 3 is inserted into the connecting hole 2, preliminary locking can be performed through the sealing ring 5, and the air tightness can be ensured.
In this embodiment, the internal diameter size of sealing ring 5 is greater than the diameter size of the tank bottom of seal groove 4, has the clearance between the tank bottom of sealing ring 5 and seal groove 4 promptly, and high-temperature gas can get into the clearance, and high-temperature gas extrudes the inner wall of sealing ring 5, and radial contraction can not take place for sealing ring 5, makes sealing ring 5 be in the tight state of expanding to make the outer wall of sealing ring 5 and the inner wall zonulae occludens of connecting hole 2, the gas tightness is good.
The width dimension of the sealing ring 5 is the same as that of the sealing groove 4, the sealing ring 5 can be tightly contacted with the end face of the sealing groove 4 after being heated and expanded, and the sealing performance is good; even in high temperature gas gets into seal groove 4, but two at least seal grooves 4 and sealing ring 5 have constituteed circuitous shape's maze runner, can reliably block high temperature gas, effectively prevent the exhaust leakage, solve the gas leakage trouble of puzzlement a specified duration under the high exhaust temperature of natural gas engine, eliminated because of leaking the engine supercharger boost pressure that leads to not enough, EGR rate is unusual, exhaust gas pollution atmosphere problem.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (5)
1. The utility model provides an effective sealed high temperature gas's blast pipe seal structure, its characterized in that includes a plurality of two liang of exhaust branch (1) of pegging graft, the one end of exhaust branch (1) is equipped with connecting hole (2), the other end of exhaust branch (1) be equipped with linkage segment (3) of connecting hole (2) looks adaptation, be equipped with two at least seal grooves (4) on linkage segment (3), be equipped with sealing ring (5) on seal groove (4).
2. An exhaust pipe sealing structure for effectively sealing high-temperature gas according to claim 1, wherein the sealing groove (4) is provided to extend circumferentially on the outer wall of the connecting section (3).
3. An exhaust pipe sealing structure for effectively sealing high-temperature gas according to claim 2, wherein said sealing ring (5) is an alloy structure.
4. An exhaust pipe sealing structure for effectively sealing high-temperature gas according to claim 1, 2 or 3, wherein the outer diameter dimension of the sealing ring (5) is larger than the inner diameter dimension of the connecting hole (2).
5. The exhaust pipe sealing structure for effectively sealing high-temperature gas according to claim 4, wherein the inner diameter dimension of the sealing ring (5) is larger than the diameter dimension of the groove bottom of the sealing groove (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010885473.XA CN111878208A (en) | 2020-08-28 | 2020-08-28 | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010885473.XA CN111878208A (en) | 2020-08-28 | 2020-08-28 | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111878208A true CN111878208A (en) | 2020-11-03 |
Family
ID=73200039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010885473.XA Pending CN111878208A (en) | 2020-08-28 | 2020-08-28 | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111878208A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508408A (en) * | 2022-03-04 | 2022-05-17 | 广西玉柴机器股份有限公司 | Method and structure for sealing high-temperature waste gas by using gas ring |
| 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 |
| CN114542256A (en) * | 2022-03-09 | 2022-05-27 | 广西玉柴机器股份有限公司 | Novel exhaust pipe sealing groove |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4104906A1 (en) * | 1991-02-18 | 1992-08-20 | Josef Fey Lamellenringe | Joining two pipes in exhaust system - by fitting seals and expander ring inside expanded end of pipe |
| JP2000204942A (en) * | 1999-01-19 | 2000-07-25 | Nippon Piston Ring Co Ltd | Sealing device for exhaust pipe |
| CN102678246A (en) * | 2011-12-19 | 2012-09-19 | 中国北车集团大连机车车辆有限公司 | Connecting mechanism for exhaust pipes of diesel engine |
| CN203856559U (en) * | 2014-04-08 | 2014-10-01 | 潍柴动力股份有限公司 | Segmented exhaust pipe interface sealing structure |
| CN111350579A (en) * | 2020-03-18 | 2020-06-30 | 广西玉柴机器股份有限公司 | High-temperature sealing structure of engine exhaust pipe |
| CN212406872U (en) * | 2020-08-28 | 2021-01-26 | 广西玉柴机器股份有限公司 | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas |
-
2020
- 2020-08-28 CN CN202010885473.XA patent/CN111878208A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4104906A1 (en) * | 1991-02-18 | 1992-08-20 | Josef Fey Lamellenringe | Joining two pipes in exhaust system - by fitting seals and expander ring inside expanded end of pipe |
| JP2000204942A (en) * | 1999-01-19 | 2000-07-25 | Nippon Piston Ring Co Ltd | Sealing device for exhaust pipe |
| CN102678246A (en) * | 2011-12-19 | 2012-09-19 | 中国北车集团大连机车车辆有限公司 | Connecting mechanism for exhaust pipes of diesel engine |
| CN203856559U (en) * | 2014-04-08 | 2014-10-01 | 潍柴动力股份有限公司 | Segmented exhaust pipe interface sealing structure |
| CN111350579A (en) * | 2020-03-18 | 2020-06-30 | 广西玉柴机器股份有限公司 | High-temperature sealing structure of engine exhaust pipe |
| CN212406872U (en) * | 2020-08-28 | 2021-01-26 | 广西玉柴机器股份有限公司 | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508408A (en) * | 2022-03-04 | 2022-05-17 | 广西玉柴机器股份有限公司 | Method and structure for sealing high-temperature waste gas by using gas ring |
| 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 |
| CN114542256A (en) * | 2022-03-09 | 2022-05-27 | 广西玉柴机器股份有限公司 | Novel exhaust pipe sealing groove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111878208A (en) | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas | |
| CN203856559U (en) | Segmented exhaust pipe interface sealing structure | |
| CN212406872U (en) | Exhaust pipe sealing structure capable of effectively sealing high-temperature gas | |
| CN111350579A (en) | High-temperature sealing structure of engine exhaust pipe | |
| CN110792508B (en) | Exhaust gas turbocharging system | |
| CN212337423U (en) | Novel engine exhaust pipe sealing structure | |
| CN201025103Y (en) | Sealing structure for engine exhaust pipe | |
| CN202851155U (en) | Heat-insulation pipe and aeroengine | |
| CN111396184A (en) | Novel engine exhaust pipe sealing structure | |
| CN217029076U (en) | Structure for sealing high-temperature waste gas by utilizing gas ring | |
| CN201627626U (en) | Engine exhaust manifold | |
| CN204921051U (en) | Use sealing device between turbo charger turbine case and bearing body | |
| CN212337421U (en) | High-temperature sealing structure of engine exhaust pipe | |
| CN202900443U (en) | Sealing gasket of automobile supercharger | |
| CN204921052U (en) | Use sealing component between turbo charger turbine case and bearing body | |
| CN102588139A (en) | Fully closed piston or gas tightness piston ring component | |
| CN112267936A (en) | Connection structure of sectional type blast pipe | |
| CN202468050U (en) | Totally-closed piston/airtightness piston ring component | |
| CN217301975U (en) | Aerodynamic seal assembly for a turbomachine | |
| CN218564377U (en) | Self-tightening type metal sealing ring with J-shaped cross section | |
| CN218030346U (en) | Sealing structure of exhaust manifold | |
| CN204457976U (en) | Sectional type exhaust tube joint connecting device | |
| CN220929522U (en) | Sectional exhaust pipe of heavy diesel engine, heavy diesel engine and automobile | |
| CN106930839B (en) | A kind of packing and sealing brush combined type internal combustion wave rotor | |
| CN115030809B (en) | Turbocharger with pneumatic dynamic pressure foil bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |