CN209115219U - A kind of nested type thermal compensation bearing of high enthalpy jet nozzle - Google Patents
A kind of nested type thermal compensation bearing of high enthalpy jet nozzle Download PDFInfo
- Publication number
- CN209115219U CN209115219U CN201821924018.0U CN201821924018U CN209115219U CN 209115219 U CN209115219 U CN 209115219U CN 201821924018 U CN201821924018 U CN 201821924018U CN 209115219 U CN209115219 U CN 209115219U
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- jet nozzle
- active cooling
- cooling section
- thermal compensation
- wall
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Abstract
The utility model discloses a kind of nested type thermal compensation bearings of high enthalpy jet nozzle, including skirt set and flange.Skirt set covers on the non-active cooling section outer wall of jet nozzle, and skirt set front end and the non-active cooling section front end of jet nozzle form cavity by being welded to connect with the non-active cooling section outer wall of jet nozzle later, and skirt set end is connect by flange with experimental cabin.The utility model load is reliable, has thermal compensation function, and structure is simple.
Description
Technical field
The utility model relates to a kind of nested type thermal compensation bearings of high enthalpy jet nozzle, belong to high enthalpy wind tunnel neck
Domain.
Background technique
In recent years, with the fast development of aeronautical and space technology, some High Mach numbers, high-performance airbreathing motor, such as
The development of supersonic cruising missile power system punching engine needs advanced high temperature, big flow high enthalpy wind tunnel to carry out
The experimental study of engine.
One key equipment of high enthalpy wind tunnel is exactly jet nozzle.To reduce processing cost, and bearing capacity is kept, jet stream
Jet pipe is big according to its leading portion heat flow density, and leading portion active cooling, back segment single wall can be used in the small work characteristics of back segment heat flow density
The cooling scheme of non-active cooling.Active cooling scheme cooling performance is good, and intensity is at high cost；Non-active cooling scheme cooling
Can be general, intensity is general, at low cost.If high enthalpy wind tunnel is that (power that wind-tunnel generates is transmitted to examination by jet nozzle to rear load scheme
Hatch checking, then basis is transmitted to by experimental cabin), jet nozzle load reduced capability, reliability drop will lead to using above-mentioned cooling scheme
It is low.
Utility model content
The technology of the utility model solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of high enthalpy jet nozzle use
Nested type thermal compensation bearing, load is reliable, has thermal compensation function, structure is simple.
The technical solution of the utility model is:
A kind of nested type thermal compensation bearing of high enthalpy jet nozzle, including skirt set and flange；
Skirt set covers on the non-active cooling section outer wall of jet nozzle, and before skirt set front end and the non-active cooling section of jet nozzle
End forms cavity by being welded to connect with the non-active cooling section outer wall of jet nozzle later, and skirt covers end and passes through flange and test
Cabin connection.
The skirt set wall surface and the non-active cooling section axis angle of jet nozzle are no more than 5 °.
The radial clearance of the flange and the non-active cooling section outer wall of jet nozzle is α D Δ T, and wherein α is jet pipe material
Linear expansion coefficient, D are nozzle exit diameter, and Δ T is the temperature rise of jet pipe wall surface.
The advantageous effects of the utility model are:
(1) power that the utility model jet nozzle is subject to passes sequentially through skirt set, flange is transmitted on experimental cabin, bearing
Not with contacts fuel gas, it is in cold conditions, intensity is higher, therefore can bear biggish thrust, greatly improves jet nozzle load energy
Power.
(2) utility model device and jet pipe outer wall front end weld to form cantilevered support structure, and jet nozzle can be made axial
It freely thermally expands, while remaining with reasonable gap with jet pipe, thermally expand jet nozzle can radially freely.To jet nozzle heat
After balance, and cantilevered support structure can be converted to freely supported structure, have thermal compensation function, while improving connection reliability.
(3) utility model device structure is simple, and high reliablity is easy to process.
Detailed description of the invention
Fig. 1 is the utility model structure chart；
Fig. 2 is nested type thermal compensation bearing and jet pipe and experimental cabin positional diagram.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model is made of skirt set 1 and flange 2, skirt covers 1 set in the non-active cooling section of jet nozzle
On outer wall, skirt covers 1 front end and the non-active cooling section front end of jet nozzle passes through welded connecting, non-active cold with jet nozzle later
But section outer wall forms cavity, and skirt covers 1 end and connect by flange 2 with experimental cabin, and to reduce cavity volume, skirt covers wall surface and jet pipe
Axis angle is no more than 5 °.
Above structure, which realizes nozzle exit section, freely to protrude into the function of experimental cabin, while realizing nozzle thrust
Reliable delivery.
There are clearance for expansion, it can be achieved that jet pipe radial direction thermal compensation, jet pipe heat between flange 2 and the non-active cooling section outer wall of jet pipe
Movable supporting can be provided for the jet pipe cantilever design after balance, reduce the effective length of cantilever, the rigidity of structure is provided.
Bearing and the non-active cooling section outer wall of jet nozzle form certain interval radially.Jet nozzle is non-active
Cooling section forms cantilever beam support construction.
The working principle and the course of work of the utility model are:
The power that jet nozzle is subject to passes sequentially through skirt set 1, flange 2 is transmitted on experimental cabin, and bearing does not connect with combustion gas
Touching is in cold conditions, and intensity is higher, therefore can bear biggish thrust.The wall temperature of non-active cooling section is higher, will necessarily be in axial direction
Thermal expansion is generated with radial.To eliminate the thermal stress caused by thermally expanding, the non-active cooling section of jet nozzle is fixed using one end
The cantilever beam of connection supports, and allows for its free wxpansion in the axial direction in this way；Bearing and the non-active cooling section of jet nozzle
There is certain interval radially, achieves that free wxpansion radially in this way.
If not active cooling section is fixedly connected with support construction using both ends, wall temperature is high, and bearing wall temperature is low, and the two will
Biggish thermal stress is generated, structure is caused to be destroyed.Vibrate larger when wind tunnel operation, the cantilevered support structure of non-active cooling section makes
Its force environment is severe, and strength reliability reduces.The gap of the utility model design load flange and non-active cooling section outer wall
For α D Δ T, wherein α is the linear expansion coefficient of jet pipe material, and D is nozzle exit diameter, and Δ T is the temperature rise of jet pipe wall surface, is both guaranteed
Its radial thermal expansion has enough gaps, and after capable of making its radial thermal expansion, is bonded just with flange 2, by connection structure
Freely supported structure is transformed by cantilever design, improves the connection reliability of non-active cooling section.
The utility model nested type thermal compensation bearing has been successfully applied to supersonic cruising missile power system development
The direct-connected testing stand in ground, operational effect is good.
In addition, utility model device can also be applied to the ground system test of same type.
The content being not described in detail in the utility model specification belongs to the well-known technique of those skilled in the art.
Claims (3)
1. a kind of nested type thermal compensation bearing of high enthalpy jet nozzle, it is characterised in that: including skirt set (1) and flange
(2)；
Skirt set (1) covers on the non-active cooling section outer wall of jet nozzle, and skirt set (1) front end and the non-active cooling section of jet nozzle
Front end forms cavity with the non-active cooling section outer wall of jet nozzle later, skirt set (1) end passes through flange by being welded to connect
(2) it is connect with experimental cabin.
2. a kind of nested type thermal compensation bearing of high enthalpy jet nozzle according to claim 1, it is characterised in that:
Skirt set (1) wall surface and the non-active cooling section axis angle of jet nozzle are no more than 5 °.
3. a kind of nested type thermal compensation bearing of high enthalpy jet nozzle according to claim 1, it is characterised in that:
The radial clearance of the flange (2) and the non-active cooling section outer wall of jet nozzle is α D Δ T, and wherein α is that the line of jet pipe material is swollen
Swollen coefficient, D are nozzle exit diameter, and Δ T is the temperature rise of jet pipe wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821924018.0U CN209115219U (en) | 2018-11-21 | 2018-11-21 | A kind of nested type thermal compensation bearing of high enthalpy jet nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821924018.0U CN209115219U (en) | 2018-11-21 | 2018-11-21 | A kind of nested type thermal compensation bearing of high enthalpy jet nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209115219U true CN209115219U (en) | 2019-07-16 |
Family
ID=67205995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821924018.0U Active CN209115219U (en) | 2018-11-21 | 2018-11-21 | A kind of nested type thermal compensation bearing of high enthalpy jet nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209115219U (en) |
-
2018
- 2018-11-21 CN CN201821924018.0U patent/CN209115219U/en active Active
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