CN-122016321-A - Supporting structure of flow guiding device in high-temperature environment

Abstract

The invention provides a supporting structure of a flow guiding device in a high-temperature environment, which is used for connecting a flow guiding basin with a flow pipe. The supporting structure provided by the invention can uniformly distribute load in all directions by changing the force transmission path, effectively avoid local stress concentration, better disperse the stress on the whole structure, improve the overall stability of the supporting structure of the flow guiding device, and have stronger structural damage resistance and deformation resistance under the action of dynamic load. Meanwhile, the invention can ensure that the flow guiding basin and the flow pipeline are positioned on the same axis through the center positioning structure, can realize deformation absorption of the flow guiding basin and the flow pipeline with different materials, and can realize synchronous and coordinated action of deformation between the two through the supporting structure.

Inventors

• XU GUO
• CHEN XUESHANG
• ZHANG YA
• ZHONG HUAGUI
• ZHOU ZHITAO
• LIU DONGGEN
• WANG FEIFEI
• Hou Xinzheng
• DENG KAI
• MIN HAO
• JI XIAOYU

Assignees

• 中国航发四川燃气涡轮研究院

Dates

Publication Date

20260512

Application Date

20260112

Claims (8)

1. 1. A supporting structure of a deflector under high temperature environment for connecting a deflector bowl (1) and a flow tube (5), characterized by comprising: A bracket (4) connected with the flow tube (5); the bracket (3) is connected with the air guide basin (1) and is coaxially arranged with the bracket (4), and the bracket (3) is connected with the bracket (4) through a sliding connection assembly.
2. 2. The test device of claim 1, wherein the sliding connection assembly comprises: the first guide support (21) is arranged on the bracket (3), and the first guide support (21) is fixedly provided with a guide strut (23); The second guide support (22) is arranged on the bracket (4), a guide groove is formed in the position, corresponding to the second guide support (22), of the bracket (4), and the guide support (23) is connected with the guide groove in a sliding fit mode.
3. 3. A deflector support structure in a high temperature environment according to claim 2, characterized in that the first guiding support (21) is constituted by two spaced reinforcing ribs, the guiding struts (23) being arranged between the two spaced reinforcing ribs.
4. 4. The supporting structure of a diversion device in a high-temperature environment according to claim 2, wherein the bracket (3) comprises a plurality of bracket units which are distributed in a central symmetry manner, two adjacent bracket units are connected through bolts, and the bracket (3) is surrounded by the plurality of bracket units.
5. 5. A deflector support structure in a high temperature environment according to claim 4, characterized in that a first guiding support (21) is provided on each bracket unit.
6. 6. The supporting structure of a deflector in a high-temperature environment according to claim 2, wherein the bracket (4) comprises a plurality of bracket units, the plurality of bracket units are distributed in a central symmetry manner, two adjacent bracket units are connected through bolts, and the plurality of bracket units jointly enclose the bracket (4).
7. 7. A deflector support structure in a high temperature environment according to claim 6, characterized in that a second guide support (22) is provided on each carrier unit.
8. 8. The supporting structure of a deflector in a high-temperature environment according to claim 1, wherein one end of the deflector bowl (1) is inserted into one end of the flow tube (5), and one end of the flow tube (5) is provided with a circumferentially arranged air seal cavity (51).

Description

Supporting structure of flow guiding device in high-temperature environment Technical Field The invention relates to the technical field of aero-engine air environment simulation test equipment, in particular to a supporting structure of a flow guiding device in a high-temperature environment. Background According to the requirements in GJB_241A-2010 general aviation turbojet and turbofan engine high-altitude simulation Specification, various engines such as new research, improvement modification and the like all need to be subjected to high-altitude simulation test examination and identification work. The front chamber flow guiding device (flow guiding basin) is used as a key device for improving the quality of an incoming flow field, ensuring the temperature non-uniformity (less than or equal to 1 percent), the pressure non-uniformity (less than or equal to 1 percent) and the turbulence level (less than or equal to +/-1 percent) of a flow tube measuring section or an engine inlet, and the structural stability of the front chamber flow guiding device is closely related to the flow quality. In the design and construction scheme of the current basin support structure of the in-use aerial environment simulation test equipment under domestic and foreign construction, the applicable temperature is usually within the range of-70-350 ℃ (support constraint is not adopted within 200 ℃, otherwise, a three-point pull rod structure is adopted for support constraint), but the defects of the traditional support structure are gradually presented as 1. The thermal stress and deformation are larger along with the further increase of the incoming flow temperature. The coefficient of thermal expansion is different between the different materials (typically the bowl is a superalloy material and the support material is carbon steel only) so that when the temperature changes dramatically, the two expand or contract to different extents and 2. The restraint stress-the support device typically restrains (fixes or limits the movement of) the bowl. Such constraints prevent the bowl and support structure from freely deforming at their respective rates of expansion, thereby creating significant thermal (tensile or compressive) stresses within both, 3. Structural deformation-sustained thermal stress cycling can cause permanent deformation (creep) of the bowl or support structure, destroying its precisely designed geometry. The slight deformation of the baffle can seriously affect the baffle effect and the pneumatic performance. Disclosure of Invention In view of the above, the invention provides a supporting structure of a flow guiding device in a high-temperature environment, so as to solve the problems that the existing supporting structure of the flow guiding device is easy to generate structural deformation under the working condition of high temperature and high pressure, and ensure the smooth development of an engine air environment simulation test. The invention provides a supporting structure of a flow guiding device in a high-temperature environment, which is used for connecting a flow guiding basin and a flow pipe. Compared with the prior art, the at least one technical scheme adopted by the invention has the beneficial effects that at least the beneficial effects comprise: 1) Compared with the traditional supporting structure force transmission mode, the supporting structure breaks through the traditional simple straight-line and plane supporting structure, adopts complex geometric shapes such as curves and cambered surfaces, changes the force transmission path, can uniformly disperse load in all directions, effectively avoids local stress concentration, can better disperse stress on the whole structure, improves the overall stability of the supporting structure of the flow guiding device, and has stronger structural damage resistance and deformation resistance under the action of dynamic load. 2) Compared with the traditional supporting structure, the invention can ensure that the guide basin and the flow pipeline are positioned on the same axis through the central positioning structure, can realize deformation absorption of the guide basin and the flow pipeline with different materials, and can realize synchronous coordination action of deformation between the guide basin and the flow pipeline through the supporting structure. 3) Compared with the traditional large pull rod supporting structure in other shapes, the supporting structure of the guide basin can disperse and transfer the circumferential and radial airflow agitating force of the internal pipeline through the support and the bracket body, effectively avoid stress concentration at a single connecting point and greatly improve the reliability of the supporting structure for resisting airflow impact. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will