CN102410106B - High-temperature sealing method of special-shaped cavity used for ramjet - Google Patents
High-temperature sealing method of special-shaped cavity used for ramjet Download PDFInfo
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- CN102410106B CN102410106B CN 201110385742 CN201110385742A CN102410106B CN 102410106 B CN102410106 B CN 102410106B CN 201110385742 CN201110385742 CN 201110385742 CN 201110385742 A CN201110385742 A CN 201110385742A CN 102410106 B CN102410106 B CN 102410106B
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Abstract
The invention discloses a high-temperature sealing method of a ramjet, which comprises the following steps of: a, preparing a sealing ring; b, forming a sealing groove; c, cleaning the sealing groove; d, uniformly applying high-temperature resistant adhesives in the sealing groove and placing the sealing ring in the sealing groove; e, connecting a protection device and the sealing ring by the high-temperature resistant adhesives and fixing by an assembling tool; f, heating and curing; and g, removing the assembling tool. The high-temperature sealing method of the ramjet in the embodiment of the invention has the characteristics of novelty and uniqueness, simple design method, small occupied space, simple assembling operation, high reliability and high practicability. The connecting structure is still intact and the reliability is high after multiple ground hot tests, and the high-temperature connecting and sealing problem at the open part of the thermal structure the ramjet combustion chamber is solved.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to a kind of high-temperature sealing method of special-shaped cavity used for ramjet.
Background technique
The motor of passive heat safeguard structure adopt the ceramic matric composite of lightweight, high temperature resistant, anti-oxidant, resistance to erosion as the anti-ablation layer of firing chamber, flexibly thermal insulation material as thermal-protective coating, this organization plan brings larger difficulty also for the passive heat current design manual of protective structures of motor when improving engine combustion efficiency, increase engine power, simplifying engine structure.Scramjet combustor is the place of fuel and the mixed combustion of incoming flow air, so metal shell, anti-ablation layer and thermal-protective coating (both are referred to as heat shield afterwards) must process suction port, in order to introduce fuel and incoming flow air.Behind the heat shield opening of firing chamber, destroyed the integrity of heat shield, there is the interface, many places of metal shell, anti-ablation layer and thermal-protective coating different materials in opening part, and the work under bad environment of opening part: temperature and pressure is inhomogeneous, temperature is between 500 ℃～1500 ℃, and pressure is washed away by high velocity air between 0.2MPa～0.8MPa, about 100m/s～the 150m/s of airspeed, in addition combustion gas oxygen content reaches 20%.Because thermal-protective coating is almost without intensity, and the air-flow that enters in the firing chamber is the fuel mixture body, and its interface by opening part enters into thermal-protective coating, produces chemical reaction, affects the normal operation of passive heat safeguard structure.For guaranteeing the normal operation of passive heat safeguard structure, must guarantee that in the whole working procedure of motor high-temperature gas is not from opening part to the heat shield internal leakage.
Since the characteristics such as high temperature, strong oxidizing property atmosphere, the high velocity air of engine operation environment wash away, the fragility of composite material self, and the restriction of assembly space and assembly method, and sealing configuration commonly used can't be realized effective sealing.Therefore, the elevated-temperature seal technology of the ceramic matric composite opening part of anti-the ablation layer becomes the key technology of pressed engine heat structure development.
The elevated-temperature seal technology of heat shield opening part has not yet to see the report of relevant design and processes method.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least.
For this reason, one object of the present invention be to propose a kind of have design method simple, take up room little, assembly manipulation simple, have the elevated-temperature seal method of the pressed engine of high reliability, high practicability.
Elevated-temperature seal method according to the pressed engine of the embodiment of the invention may further comprise the steps: a, adopt the get everything ready seal ring of reservation shape of graphite-made; B, in the firing chamber of pressed engine and/or the predetermined position of jet pipe form the seal groove suitable with described seal ring; C, clean described seal groove; D, in seal groove, evenly smear high temperature resistant adhesive, described seal ring is placed in the described seal groove; E, protective gear is linked to each other with described high temperature resistant binder with described seal ring and fix with assembly tooling; F, intensification are solidified: engine chamber and/or the jet pipe that will finish the b-e step are placed 4～24h in room temperature, dry air environment; Then integral body is put into baking box and freely is warming up to 75-90 ℃ with stove, and insulation 1-3.5h; Then freely be warming up to 100-130 ℃, and insulation 2-3h; Then freely be warming up to 170-180 ℃, and insulation 1.5-3h; Cool at last room temperature with the furnace; With g, removal assembly tooling.
Elevated-temperature seal method according to the pressed engine of the embodiment of the invention, novel unique, design method is simple, it is little to take up room, assembly manipulation simple, have the characteristics such as high reliability, high practicability, after repeatedly the ground hot test is examined, it is complete that linkage structure still keeps, reliability is high, has solved the high temperature conjunction sealing difficult problem of engine chamber heat structure opening part.
In addition, the elevated-temperature seal method of pressed engine according to the above embodiment of the present invention can also have following additional technical characteristics:
The elevated-temperature seal method of pressed engine according to an embodiment of the invention, the density of described seal ring are 1.4g/cm
3～1.8g/cm
3
The elevated-temperature seal method of pressed engine according to an embodiment of the invention adopts anhydrous alcohol or acetone to clean described seal groove.
The elevated-temperature seal method of pressed engine according to an embodiment of the invention, described protective gear be guard circle so that the shape of its shape and shaped cavity adapts, seal ring is protected, prevent high velocity air washing away and destroy seal ring.
The elevated-temperature seal method of pressed engine according to an embodiment of the invention, described assembly tooling are compression tooling, seal ring closely or intactly can be filled in the seal groove.
The elevated-temperature seal method of pressed engine according to an embodiment of the invention, described intensification curing schedule is: engine chamber and/or the jet pipe that will finish the b-e step are placed 4～24h in room temperature, dry air environment; Then integral body is put into baking box and freely is warming up to 80 ℃ with stove, and insulation 2h; Then freely be warming up to 120 ℃, and insulation 2h; Then freely be warming up to 180 ℃, and insulation 2h; Cool at last room temperature with the furnace.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Fig. 1 is the schematic flow sheet according to the elevated-temperature seal method of the pressed engine of the embodiment of the invention.
Embodiment
The below describes embodiments of the invention in detail, and described embodiment's example is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center "; " vertically "; " laterally "; " on "; D score; " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance.
In description of the invention, need to prove that unless clear and definite regulation and restriction are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be to be fixedly connected with, connect integratedly, also can be to removably connect; Can be mechanical connection or electrical connection, also can be the connection of two element internals; Can be directly to link to each other, also can indirectly link to each other by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
Describe elevated-temperature seal method according to the pressed engine of the embodiment of the invention in detail below with reference to accompanying drawing.
As shown in Figure 1, the elevated-temperature seal method according to the pressed engine of the embodiment of the invention may further comprise the steps:
A, adopt the get everything ready seal ring of reservation shape of graphite-made.
Therefore the characteristic that graphite has is high temperature resistant, oxidation resistance is good becomes the preferred material of preparation seal ring.Seal ring can be integrally formed, also can be according to the matching requirements sectional forming, but will protect the connection interface between each section.The density of described seal ring can be 1.4g/cm
3～1.8g/cm
3
B, in the firing chamber of pressed engine and/or the predetermined position of jet pipe form the seal groove suitable with described seal ring.
That is to say, process respectively for the suitable seal groove of described seal ring in the firing chamber of pressed engine and/or the position such as the sealing of the needs such as opening part of jet pipe.
C, clean described seal groove.For example, can adopt anhydrous alcohol or acetone to clean described seal groove, require to accomplish any surface finish not allowed the manufacturing deficiencies such as pit, projection, not allow the foreign material such as particle, metal fillings, adhesive.
D, evenly smearing high temperature resistant adhesive in seal groove, place the scheduled time at room temperature, for example can be 10 minutes, then described seal ring is placed in the described seal groove.
E, protective gear is linked to each other with described high temperature resistant binder with described seal ring and fix with assembly tooling.
F, intensification are solidified: engine chamber and/or the jet pipe that will finish the b-e step are placed first scheduled time, for example 4～24h in room temperature, dry air environment; Then integral body is put into baking box and freely is warming up to the first predetermined temperature with stove, and for example 75-90 ℃, preferably 80 ℃, and be incubated for second scheduled time, for example 1-3.5h, preferably 2h; Then freely be warming up to the second predetermined temperature, for example 100-130 ℃, preferably 120 ℃, and be incubated for the 3rd scheduled time, for example 2-3h, preferably 2h; Then freely be warming up to the 3rd predetermined temperature, for example 170-180 ℃, preferably 180 ℃, and be incubated for the 4th scheduled time, for example 1.5-3h, preferably 2h; Cool at last room temperature with the furnace.
G, removal assembly tooling.
Elevated-temperature seal method according to the pressed engine of the embodiment of the invention, novel unique, design method is simple, it is little to take up room, assembly manipulation simple, have the characteristics such as high reliability, high practicability, after repeatedly the ground hot test is examined, it is complete that linkage structure still keeps, reliability is high, has solved the high temperature conjunction sealing difficult problem of engine chamber heat structure opening part.
According to one embodiment of present invention, described protective gear for for guard circle so that the shape of its shape and shaped cavity adapts, seal ring is protected, prevent high velocity air washing away and destroy seal ring.
According to some embodiments of the present invention, described assembling work is compression tooling, seal ring closely or intactly can be filled in the seal groove.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiments or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiments in the situation that does not break away from principle of the present invention and aim, scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. the elevated-temperature seal method of a pressed engine is characterized in that, may further comprise the steps:
A, adopt the get everything ready seal ring of reservation shape of graphite-made;
B, in the firing chamber of pressed engine and/or the predetermined position of jet pipe form the seal groove suitable with described seal ring;
C, clean described seal groove;
D, in seal groove, evenly smear high temperature resistant adhesive, described seal ring is placed in the described seal groove;
E, protective gear is linked to each other with described high temperature resistant binder with described seal ring and fix with assembly tooling;
F, intensification are solidified: engine chamber and/or the jet pipe that will finish the b-e step are placed 4～24h in room temperature, dry air environment; Then integral body is put into baking box and freely is warming up to 75-90 ℃ with stove, and insulation 1-3.5h; Then freely be warming up to 100-130 ℃, and insulation 2-3h; Then freely be warming up to 170-180 ℃, and insulation 1.5-3h; Cool at last room temperature with the furnace; With
G, removal assembly tooling.
2. the elevated-temperature seal method of pressed engine according to claim 1 is characterized in that, the density of described seal ring is 1.4g/cm
3～1.8g/cm
3
3. the elevated-temperature seal method of pressed engine according to claim 1 and 2 is characterized in that, adopts anhydrous alcohol or acetone to clean described seal groove.
4. the elevated-temperature seal method of pressed engine according to claim 1 and 2; it is characterized in that; described protective gear be guard circle so that the shape of its shape and shaped cavity adapts, seal ring is protected, prevent high velocity air washing away and destroy seal ring.
5. the elevated-temperature seal method of pressed engine according to claim 1 and 2 is characterized in that, described assembly tooling is compression tooling, seal ring closely or intactly can be filled in the seal groove.
6. the elevated-temperature seal method of pressed engine according to claim 1 and 2 is characterized in that, described intensification curing schedule is: engine chamber and/or the jet pipe that will finish the b-e step are placed 4～24h in room temperature, dry air environment; Then integral body is put into baking box and freely is warming up to 80 ℃ with stove, and insulation 2h; Then freely be warming up to 120 ℃, and insulation 2h; Then freely be warming up to 180 ℃, and insulation 2h; Cool at last room temperature with the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110385742 CN102410106B (en) | 2011-11-28 | 2011-11-28 | High-temperature sealing method of special-shaped cavity used for ramjet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110385742 CN102410106B (en) | 2011-11-28 | 2011-11-28 | High-temperature sealing method of special-shaped cavity used for ramjet |
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| CN102410106A CN102410106A (en) | 2012-04-11 |
| CN102410106B true CN102410106B (en) | 2013-03-13 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2602086B2 (en) * | 1988-05-19 | 1997-04-23 | 三菱電線工業株式会社 | Heat resistant gasket |
| AU691203B2 (en) * | 1993-11-10 | 1998-05-14 | Minnesota Mining And Manufacturing Company | Melt-flowable materials and method of sealing surfaces |
| WO1997017535A1 (en) * | 1995-11-10 | 1997-05-15 | Druckgusswerk Mössner GmbH | Process for producing a seal and pressing means |
| US6554936B1 (en) * | 1999-09-08 | 2003-04-29 | Alliant Techsystems Inc. | Method of constructing insulated metal dome structure for a rocket motor |
| CN1327912A (en) * | 2001-07-04 | 2001-12-26 | 株洲时代橡塑股份有限公司 | Technology for making integral spherical hinge with rubber jacket by squeeze and its product and mould |
| RU2287103C1 (en) * | 2005-03-02 | 2006-11-10 | ФГУП Опытное конструкторское бюро "ГИДРОПРЕСС" | Method of mounting sealing rings |
| GB0517833D0 (en) * | 2005-09-02 | 2005-10-12 | Rolls Royce Plc | A seal arrangement and a method of seal assembly |
| CN101451059A (en) * | 2007-12-07 | 2009-06-10 | 中国科学院金属研究所 | Carbon graphite composite material for combustion chamber sealing and preparation method thereof |
| CN101642961A (en) * | 2008-08-05 | 2010-02-10 | 上海复合材料科技有限公司 | Method for winding heat insulating layer of diffuser of solid-propellant rocket engine |
| CN101956888B (en) * | 2010-08-30 | 2012-10-10 | 国营江北机械厂 | Solid ramjet shell bonding, pressing and assembling method and rounding device |
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Inventor after: Li Zhiyong Inventor after: Li Jianmei Inventor after: Li Lihan Inventor after: Ling Wenhui Inventor after: Zheng Riheng Inventor after: Chen Jingmin Inventor before: Yang Yue Inventor before: Liu Xiufen Inventor before: Li Feng Inventor before: Song Yifan |
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Free format text: CORRECT: INVENTOR; FROM: YANG YUE LIU XIUFEN LI FENG SONG YIFAN TO: LI ZHIYONG LI JIANMEI LI LIHAN LING WENHUI ZHENG RIHENG CHEN JINGMIN |
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