CN206513829U - A kind of high-temperature sealing structure for EGR by-passing valves - Google Patents
A kind of high-temperature sealing structure for EGR by-passing valves Download PDFInfo
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- CN206513829U CN206513829U CN201720207136.9U CN201720207136U CN206513829U CN 206513829 U CN206513829 U CN 206513829U CN 201720207136 U CN201720207136 U CN 201720207136U CN 206513829 U CN206513829 U CN 206513829U
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Abstract
The utility model is related to a kind of high-temperature sealing structure for EGR by-passing valves, including：The outer shaft sleeve for being enclosed on the kinematic axis of EGR by-passing valves and being fixedly connected with main support, sealing shroud, clamping sleeve, interior wavy spring, stabilizer, sealing ring, sealing cap, outer wavy spring, limiting plate are installed successively from inside to outside, described limiting plate is threadedly coupled with kinematic axis in described outer shaft sleeve.Two seals are employed on the utility model kinematic axis, sealing is to be resistant to high temperature together, and seal is then emphasized in second sealing, while used wavy spring, made after encapsulant weares and teares, can obtained the recovery of part by the extruding of spring, increase the service life.
Description
Technical field
The utility model is related to a kind of high-temperature sealing structure for EGR by-passing valves, is that one kind is used for automobile engine ring
The rotary seal structure of equipment is protected, is the mechanically-sealing apparatus at a kind of by-passing valve for engine EGR system at kinematic axis.
Background technology
Engines exhaust gas recirculation（Abbreviation EGR）Cooling technology is that the portion for being discharged automobile engine passes through
After cooler for recycled exhaust gas cooling, common participation burning after engine chamber is mixed with fresh air is passed back to again, so as to effectively drop
Low nitrogen oxide（NOx）A kind of emission control technique of discharge.
But in engine cold-start stage and low-speed low-load region, if gas temperature of the EGR gases after supercooling
Spend it is low if, gas in-cylinder combustion temperature can be caused too low, caused it is impossible to meet emission request, so under these operating modes,
Egr system needs to increase bypass line, and EGR by-passing valves control EGR gases through being cooled down without cooler for recycled exhaust gas
Valve.The working environment of EGR by-passing valves is very severe, in the state of engine stop, and EGR by-passing valves are in normal temperature state,
And it is high-temp waste gas that EGR by-passing valves, which pass through, during engine work.Because automobile engine is a kind of equipment of frequent start-stop, because
This, EGR by-passing valves are often operated in the state of temperature big rise and big fall, and this is just to the seal request at EGR by-passing valve kinematic axis
It is very high.Traditional EGR by-passing valves use a kind of relatively simple seal form, due to the temperature and movement friction of frequent cataclysm
Effect, traditional EGR by-passing valves sealing structure is easy to the problem of EGR gases are leaked occur in actual applications, it makes
It is shorter than the service life of the most parts of engine with the life-span, forms engine failure, have impact on the work of whole engine,
Or even the working condition of whole automobile.
The content of the invention
In order to overcome problem of the prior art, the utility model proposes a kind of elevated-temperature seal knot for EGR by-passing valves
Structure, described structure uses two seals, strengthens sealing effectiveness.
What the purpose of this utility model was realized in：A kind of high-temperature sealing structure for EGR by-passing valves, including：Set
Pacify successively from inside to outside in the outer shaft sleeve being fixedly connected on the kinematic axis of EGR by-passing valves and with main support, described outer shaft sleeve
Fill sealing shroud, clamping sleeve, interior wavy spring, stabilizer, sealing ring, sealing cap, outer wavy spring, limiting plate, described limiting plate
Riveted with kinematic axis.
Further, described sealing shroud is flexible graphite sealing set.
Further, described kinematic axis is provided with multiple tracks annular groove or projection at elevated-temperature seal set.
Further, described sealing ring is backbone sealing ring.
Further, described stabilizer is copper sheathing.
Further, described sealing cap is plate stamping part.
The utility model produce beneficial effect be：The utility model employs two seals on kinematic axis, close together
Envelope is to be resistant to high temperature, and seal is then emphasized in second sealing, while used wavy spring, makes after encapsulant weares and teares, can be with
By the extruding of spring, the recovery of part is obtained, is increased the service life.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the schematic diagram of structure described in embodiment one of the present utility model；
Fig. 2 is the schematic diagram of structure described in embodiment three of the present utility model.
Embodiment
Embodiment one：
The present embodiment is a kind of high-temperature sealing structure for EGR by-passing valves, as shown in Figure 1.The present embodiment includes：It is enclosed on
Pacify successively from inside to outside in the outer shaft sleeve 3 being fixedly connected on the kinematic axis 1 of EGR by-passing valves and with main support 2, described outer shaft sleeve
Fill sealing shroud 4, clamping sleeve 5, interior wavy spring 6, stabilizer 7, sealing ring 8, sealing cap 9, outer wavy spring 10, limiting plate 11, institute
The limiting plate stated is threadedly coupled with kinematic axis.
In the present embodiment, secondary seal is provided with kinematic axis.Sealing shroud, clamping sleeve and interior wavy spring constitute two grades
Sealed before sealedly（Front and rear concept is determined according to by the possible outflow direction of sealing gas）, herein sealing gas temperature compared with
Height, sealing shroud can be from the higher flexible graphite material of heatproof, and clamping sleeve is compressed to sealing shroud during assembling, and decrement can
It is adjusted as needed.Sealing shroud can produce a certain degree of abrasion in use, so there is provided interior wavy spring
（Or disc spring）, after sealing shroud weares and teares, it is compensated, keeps the sealing effectiveness of sealing shroud stable.
Sealing ring, axle cap and the outer waveform groups of springs set on kinematic axis is into the rear sealing in secondary seal, to preceding close
The portion gas leaked at envelope is sealed.Because temperature is relatively low herein, sealing ring can select the bone of fluorubber material
Frame sealing ring.Outer wavy spring plays the role of reset by limiting plate and sealing cap to kinematic axis, it is to avoid kinematic axis axial float.
The stabilizer set on kinematic axis is used for ensureing stabilization when kinematic axis is rotated, it is to avoid kinematic axis is when rotating
Tilt.Stabilizer can be copper, or other materials is constituted.
Embodiment two：
The present embodiment is the improvement of embodiment one, is refinement of the embodiment on sealing shroud.Sealing described in the present embodiment
Set is flexible graphite sealing set.
Flexible graphite sealing set is formed by flexible graphite paper compacting, non-with good high temperature resistant and self-lubricating property
Often it is applied to high temperature motion seal.
Embodiment three：
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment on kinematic axis.Described in the present embodiment
Kinematic axis at elevated-temperature seal set provided with multiple tracks annular groove or projection 101, as shown in Figure 2.
For produce better seal effect, some annular recess or projection can be set on kinematic axis, make kinematic axis with
The rough combination of shape between sealing shroud, to be more beneficial for sealing.
Example IV：
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment on sealing ring.Described in the present embodiment
Sealing ring be backbone sealing ring.
Backbone sealing ring or for skeleton-type oil seal, good sealing effect, usually using flexible elastomeric material, centre is carried
The skeleton of hard material, work that can be steady in a long-term in the case where relative temperature is relatively low.
Embodiment five：
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment on stabilizer.Described in the present embodiment
Stabilizer be copper sheathing.
Stabilizer can be with various metal materials, such as：Alloy material etc..Using copper material can in the way of powder die-casting,
Form the form similar to sliding bearing.
Embodiment six：
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment on sealing cap.Described in the present embodiment
Sealing cap is plate stamping part.
Sealing cap primarily serve outer shaft sleeve sealing elements therein is fixed and sealing and dustproof effect, thin plate can be used to rush
It is molded, to mitigate weight.
Finally it should be noted that above it is only unrestricted to illustrate the technical solution of the utility model, although with reference to compared with
The utility model is described in detail good arrangement, it will be understood by those within the art that, can be to this reality
With new technical scheme（Such as shape, connected mode, annexation of each sealing key element etc.）Modify or equivalent
Replace, without departing from the spirit and scope of technical solutions of the utility model.
Claims (6)
1. a kind of high-temperature sealing structure for EGR by-passing valves, including：It is enclosed on the kinematic axis of EGR by-passing valves and and main support
The outer shaft sleeve being fixedly connected, it is characterised in that install sealing shroud, clamping sleeve, interior ripple in described outer shaft sleeve successively from inside to outside
Shape spring, stabilizer, sealing ring, sealing cap, outer wavy spring, limiting plate, described limiting plate are riveted with kinematic axis.
2. high-temperature sealing structure according to claim 1, it is characterised in that described sealing shroud is flexible graphite sealing
Set.
3. high-temperature sealing structure according to claim 2, it is characterised in that described kinematic axis is set at elevated-temperature seal set
There are multiple tracks annular groove or projection.
4. the high-temperature sealing structure according to one of claim 1-3, it is characterised in that described sealing ring is reinforced seal
Circle.
5. the high-temperature sealing structure according to one of claim 1-3, it is characterised in that described stabilizer is copper sheathing.
6. the high-temperature sealing structure according to one of claim 1-3, it is characterised in that described sealing cap is plate stamping
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720207136.9U CN206513829U (en) | 2017-03-06 | 2017-03-06 | A kind of high-temperature sealing structure for EGR by-passing valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720207136.9U CN206513829U (en) | 2017-03-06 | 2017-03-06 | A kind of high-temperature sealing structure for EGR by-passing valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206513829U true CN206513829U (en) | 2017-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720207136.9U Active CN206513829U (en) | 2017-03-06 | 2017-03-06 | A kind of high-temperature sealing structure for EGR by-passing valves |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111971495A (en) * | 2018-04-04 | 2020-11-20 | 法国原子能源和替代能源委员会 | Metal seal assembly for sealing between rotating shaft and stationary frame |
| US11230964B2 (en) | 2020-04-20 | 2022-01-25 | Caterpillar Inc. | Machine system having cooler with pack seal and header assembly for same |
-
2017
- 2017-03-06 CN CN201720207136.9U patent/CN206513829U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111971495A (en) * | 2018-04-04 | 2020-11-20 | 法国原子能源和替代能源委员会 | Metal seal assembly for sealing between rotating shaft and stationary frame |
| US11230964B2 (en) | 2020-04-20 | 2022-01-25 | Caterpillar Inc. | Machine system having cooler with pack seal and header assembly for same |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100124 Chen Jialin, 9 hospital, eight Li Zhuang village, Gaobeidian Township, Chaoyang District, Beijing, 7 floor 705, 706 rooms, building 1, Patentee after: Beijing United Bridge Technology Group Co., Ltd. Address before: 100025 room 709, block A, Hua Ting Century Park, Chen Jialin 9, eight Li Zhuang, Chaoyang District, Beijing. Patentee before: Meilianqioa Sci. & Tech. Development Co., Ltd., Beijing |
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| CP03 | Change of name, title or address |