阅读说明：本技术 一种独立的拱形带支撑的高低温连接结构 (Independent high-low temperature connecting structure with arch-shaped support ) 是由 吕军 李斌 郑鸣辉 刘健 李鹏廷 宋锋 于 2020-12-22 设计创作，主要内容包括：一种独立的拱形带支撑的高低温连接结构,为左右对称结构,左右结构相同,均包括起到主要支撑的作用的主级支撑梁、次级弧部支撑梁、次级底部支撑梁、拱形连接梁、尾端支撑梁、支撑梁外伸侧螺栓脚、支撑梁外伸侧螺栓台、无支撑梁外伸侧螺栓脚。支撑梁外伸侧螺栓脚、支撑梁外伸侧螺栓台位于高温端,无支撑梁外伸侧螺栓脚位于低温端。其中,次级支撑梁将载荷传递到主级支撑梁上；拱形连接梁是连接的主体部分,也是高温端低温端的主要过渡部分。本发明采用楔形螺栓连接安装,可有效降低与连接件连接的热端结构如陶瓷罩等,有效减轻结构之间的热失配现象。同时加装次级梁的支撑结构件,可提高连接件承受外力载荷的能力,整体增强高低温连接结构的强度。(The utility model provides a high low temperature connection structure that independent arch area supported, for bilateral symmetry structure, control the structure the same, all include the main grade supporting beam, secondary arc portion supporting beam, secondary bottom supporting beam, arch tie-beam, tail end supporting beam, the overhanging side bolt foot of a supporting beam, the overhanging side bolt platform of a supporting beam, the overhanging side bolt foot of no supporting beam that play the effect of main support. The support beam overhanging side bolt foot and the support beam overhanging side bolt platform are positioned at the high temperature end, and the support beam-free overhanging side bolt foot is positioned at the low temperature end. Wherein the secondary support beams transfer loads to the primary support beams; the arched connecting beam is a main body part of the connection and is also a main transition part of the low-temperature end of the high-temperature end. The invention adopts the wedge bolt for connection and installation, can effectively reduce hot end structures such as ceramic covers and the like connected with the connecting piece, and effectively reduces the phenomenon of thermal mismatch between the structures. And meanwhile, the supporting structural member of the secondary beam is additionally arranged, so that the capacity of bearing external force load of the connecting piece can be improved, and the strength of the high-low temperature connecting structure is integrally enhanced.)

1. The high-low temperature connecting structure with the arch-shaped support is characterized by being of a bilateral symmetry structure and comprising a primary support beam (1), a secondary arc-shaped support beam (2), a secondary bottom support beam (3), an arch-shaped connecting beam (4), a tail end support beam (5), support beam overhanging side bolt feet (6), support beam overhanging side bolt platforms (7) and non-support beam overhanging side bolt feet (8); the support beam overhanging side bolt foot (6) and the support beam overhanging side bolt platform (7) are positioned at the high temperature end, and the bolt foot (8) without the support beam overhanging side is positioned at the low temperature end;

the two main-stage supporting beams (1) are of a strip-shaped structure, the directions are consistent, a certain angle is formed between the two main-stage supporting beams and the vertical direction, and the end parts of the two main-stage connecting beams (1) are connected to form a rectangle; the upper end of each primary support beam (1) is connected with a secondary arc support beam (2), the lower end of each primary support beam is connected with a secondary bottom support beam (3), and the end part of each primary support beam (1) is positioned at the intersection of a plurality of beam structures of the secondary arc support beam (2) and the bottom support beam (3); when the structure is subjected to severe thermal expansion, the primary support beam (1) can convert the longitudinal deformation of the connecting piece structure into transverse deformation, so that the thermal expansion stress of a low-expansion structure connected with the connecting piece structure is reduced;

secondary arc portion supporting beam (2) be irregular shape, including many long banding beam structure, the bottom of many beam structure and the long banding structure tip of primary supporting beam (1) intersect, the other end outwards stretches out along the upper end terminal surface and the side of primary supporting beam (1): wherein, the beam structure extending outwards from the end surface extends to the arc part of the arched connecting beam (4), and the beam structure extending outwards from the side surface extends to and is connected with the overhanging side bolt platform (7) of the supporting beam; the secondary arc support beam (2) transfers the load to the primary support beam (1);

secondary bottom sprag roof beam (3) be irregular shape, including many long banding beam structure, the top of many beam structure and the long banding structure tip of primary support roof beam (1) intersect, the other end outwards stretches out along the bottom terminal surface and the side of primary support roof beam (1): wherein the beam structure extending outwards from the end face extends to and is connected with the bolt platform (7) at the overhanging side of the support beam, and the beam structure extending outwards from the side face extends to the bottom of the arched connecting beam (4); the secondary bottom support beam (3) transfers the load on the bottom to the primary support beam (1);

the arched connecting beam (4) is of an integrated structure and comprises a bottom horizontal section and an arched arc part, wherein the bottom end of the arched arc part is positioned at the tail end of the horizontal section; the arched arc part is vertically connected with a beam structure of the secondary arc part supporting beam (2), and the bottom horizontal section is connected with a beam structure extending out of the secondary bottom supporting beam (3) and forms a certain angle; the two arched connecting beams (4) with the bilateral symmetry structure form an arched beam structure and a bottom horizontal beam structure, are used as a main body part of connection and are main transition parts of a high-temperature end and a low-temperature end;

the tail end supporting beam (5) is of a long-strip-shaped beam structure which is obliquely arranged, is positioned at the tail end of the horizontal section of the arched connecting beam (4), extends out of the tail end of the horizontal section of the arched supporting beam (4) to the outward extending side of the supporting beam to a bolt table (7) at the outward extending side of the supporting beam and is connected with the bolt table;

the bolt feet (6) at the overhanging side of the supporting beam are composed of a plurality of single-double bolt feet which are extended from the side surface of the arched connecting beam (4) to the overhanging side of the supporting beam, and the side is positioned at the high-temperature end of the whole environment; the bolt feet (6) at the overhanging side of the support beam are arranged on the horizontal section and the arched arc part of the arched connecting beam (4); wherein, a plurality of 8-shaped double-bolt mounting feet are adopted in the arc part area of the arc connecting beam (4); the horizontal area of the arched connecting beam (4) consists of a plurality of single bolt feet which extend out from the side surface of the arched connecting beam (4) to the overhanging side of the supporting beam;

the bolt platforms (7) at the overhanging side of the supporting beam are provided with a plurality of bolt platforms at the arched arc part and the overhanging side of the supporting beam at the bottom to be connected with the secondary supporting beams (2) and (3) which are overhanging, thereby playing the roles of strengthening connection and bearing load; the side is at the high temperature end of the overall environment;

the bolt feet (8) without the support beam extending outwards are composed of a plurality of single bolt feet which extend from the side surface of the arched connecting beam (4) to the side without the support beam extending outwards and are positioned at the low-temperature end of the whole environment; the arrangement of the mounting feet without the outward extending side of the supporting beam is parallel to the positions of the mounting feet with the outward extending side of the supporting beam, so that the shear stress generated on the middle connecting beam during connection is avoided.

2. An arch-type belt-supported high and low temperature connecting structure as claimed in claim 1, wherein the angle between the bottom horizontal section of the arch-type connecting beam (4) and the beam structure extending outside the bottom secondary supporting beam (3) is 45-60 °.

Technical Field

The invention belongs to an arch-shaped belt support high-low temperature connecting structure for a radar cover and an arrow body metal structure of a high-speed aircraft, which can effectively reduce the excessive thermal stress generated by the mismatch of the thermal expansion coefficients of metal and a ceramic cover under the condition of reducing the weight of the structure and meet the bearing requirement of the ceramic cover of the aircraft under the action of pneumatic load.

Background

In the flying process of the high-speed aircraft, the high-speed aircraft faces an extreme aerodynamic thermal environment, and the temperature gradient among all parts of the aircraft is large. Therefore, it is often necessary to connect the high temperature end with the low temperature end, such as between the radar cover and the body. Meanwhile, the connecting piece structure needs to meet the structure bearing requirement in a high-temperature environment, the thermal expansion coefficient of the connecting piece structure is often different from that of the high-temperature end connected structure, and due to the fact that a large temperature gradient exists, the phenomenon of thermal mismatch is easy to occur between the high-temperature structure and the low-temperature structure, so that too high thermal stress is generated between the high-temperature structure and the low-temperature structure, and the whole aircraft structure fails.

Common connection structure in the engineering is the structure function body that basic substructure subassembly by face structure, beam structure, shell structure etc. generally constructs through certain connected mode, compares independent single material part, and structural design is complicated, and the commonality is low. In the aerospace field, due to complex load and severe working environment, the design of connecting structural members in a high-speed aircraft is particularly complex, basic structures such as bars, beams, shells and the like are usually fixed together in a bolt connection mode, an adhesion mode, a welding mode and the like, and a movable mechanism is formed through connection modes such as hinges, gears, springs, lockers and the like. Structural reinforcement of the components is generally required to ensure the reliability of the connection structure, which results in an increase in the mass of the overall structure.

In order to solve the problems, the invention provides an arched strip support high-low temperature connecting structure based on high-temperature alloy. Based on the topological optimization technology of the thermal structure, a stress-strain curve of the high-low temperature connecting structure under the action of high-temperature gradient is found out. The designed high-low temperature structure is a combination of an arched connecting beam 4 with a bolt connecting hole and a supporting beam. The structure can reduce the thermal expansion displacement of the support beam in the radial direction of the connecting piece structure while meeting the pneumatic load loading. And because the high-temperature alloy single material is adopted as the main material of the connecting piece, the light-weight design requirement is met under the condition that the designed connecting piece structure can ensure the structure to bear.

Disclosure of Invention

In order to solve the problems, the invention provides a high-low temperature connecting structure with a support, which not only meets the strength requirement of loading external load, but also can effectively relieve the problem of thermal stress caused by thermal expansion. Because the high-speed aircraft has symmetry, the high-low temperature connecting piece designed by the invention is of a bilateral symmetry structure.

In order to achieve the purpose, the invention adopts the technical scheme that:

a high-low temperature connecting structure supported by an arched belt is a bilateral symmetrical structure, has the same left-right structure and comprises a primary supporting beam, a secondary arc supporting beam 2, a secondary bottom supporting beam 3, an arched connecting beam 4, a tail end supporting beam 5, supporting beam overhanging side bolt feet 6, a supporting beam overhanging side bolt platform 7 and non-supporting beam overhanging side bolt feet 8. The support beam overhanging side bolt foot 6, the support beam overhanging side bolt boss 7 are located at the high temperature end, and the non-support beam overhanging side bolt foot 8 is located at the low temperature end.

The two main-stage supporting beams 1 are of a strip-shaped structure, the directions are consistent, a certain angle is formed between the directions and the vertical direction, and the two ends of the two main-stage connecting beams 1 are connected with each other to form a rectangle so as to play a role in mutual inhibition of deformation. The upper end of each primary support beam 1 is connected with a secondary arc support beam 2, the lower end of each primary support beam is connected with a secondary bottom support beam 3, and the end part of each primary support beam 1 is positioned at the intersection of a plurality of beam structures of the secondary arc support beams 2 and the secondary bottom support beams 3. The main-stage support beam 1 is used for playing a main supporting role, increasing the overall rigidity, and converting the longitudinal deformation of a connecting piece structure into the transverse deformation when the structure has severe thermal expansion, so that the thermal expansion stress of a low-expansion structure connected with the connecting piece structure is reduced. The shape and size of the support beam are determined by the load and thermal boundary conditions of the whole structure.

Secondary arc portion supporting beam 2 be irregular shape, including many long banding beam structure, the one end of all beam structure intersects, the other end outwards extends, specifically is along the upper end terminal surface and the side of primary support beam 1 outwards stretches out: wherein the beam structure extending outwards from the end face extends to the arc part of the arched connecting beam 4, and the beam structure extending outwards from the side face extends to the arc part bolt table and is connected with the arc part bolt table. The secondary arc support beam 2 of the invention can transfer load to the primary support beam 1, and plays a role in strengthening the rigidity of the whole connecting piece structure, and can also strengthen the connecting capacity between the connecting piece and the low-expansion structure. The shape and size of the support beam are determined by the load and thermal boundary conditions of the whole structure.

Secondary bottom sprag beam 3 be irregular shape, including the roof beam structure of many rectangular form structures, the one end of all roof beam structures is crossed, the other end outwards extends, specifically for outwards stretching out along the bottom end face and the side of primary support beam 1: wherein the beam structures projecting outwardly from the end faces extend to and are connected to the bottom bolting station and wherein the beam structures projecting outwardly from the side faces extend to the bottom of the arched connecting beams 4. The secondary bottom support beam 3 can transfer the load received by the bottom to the primary support beam 1, and the support beam extending to the bottom of the arched connecting beam 4 can enhance the rigidity of the primary support beam 1 and inhibit the excessive thermal deformation of the primary support beam. The shape and size of the support beam are determined by the load and thermal boundary conditions of the whole structure.

The arched connecting beam 4 is of an integrated structure and comprises a bottom horizontal section and an arched arc part, wherein the bottom end of the arched arc part is positioned at the tail end of the horizontal section. The arched arc part is vertically connected with a beam structure of the secondary arc part supporting beam 2, the bottom horizontal section is connected with the beam structure extending out of the bottom secondary supporting beam 3 at a certain angle, and the supporting beam and the plane of the bottom horizontal section form an angle of 45-60 degrees. The arched connecting beam 4 is a main body part of the connection, one side of which is positioned at the high-temperature end, and the other side of which is positioned at the low-temperature section, and is a main transition part of the low-temperature end of the high-temperature end. The shape and size of the connecting beam are determined by the load and thermal boundary conditions borne by the whole structure.

The tail end support beam 5 is a long-strip-shaped beam structure which is obliquely arranged, is positioned at the tail end of the horizontal section of the arched connecting beam 4, extends out of the tail end of the horizontal section of the arched support beam 4 to the overhanging side of the support beam to a bolt platform 7 at the overhanging side of the support beam and is connected with the bolt platform. The support beam enhances the rigidity of the arched tail end and enhances the ability of the tail end portion to be attached to the low expansion material so that the tail end portion does not come off the low expansion material attached thereto. The shape and size of the support beam are determined by the load and boundary conditions of the whole structure.

The bolt feet 6 at the overhanging side of the supporting beam are composed of a plurality of single and double bolt feet which are arranged on the side surface of the arched connecting beam 4 and extend towards the overhanging side of the supporting beam, and the side is positioned at the high-temperature end of the whole environment. The bolt feet 6 at the overhanging side of the supporting beam are arranged on the horizontal section and the arched arc part of the arched connecting beam 4; wherein, in the arch arc part area of the arch-shaped connecting beam 4, a plurality of 8-shaped double-bolt mounting feet are adopted, so as to enhance the connecting performance and reduce the displacement of the low-expansion material at the high-temperature end; in the horizontal area of the arched connecting beam 4, the arched connecting beam 4 is composed of a plurality of single bolt feet which extend out from the side surface of the arched connecting beam 4 to the overhanging side of the supporting beam, the connecting level is low, and the single bolt feet can reduce the weight. The diameter, thickness and the like of the bolt mounting foot are determined by the load borne by the whole structure and the thermal boundary conditions.

The bolt platforms 7 on the overhanging side of the supporting beam are provided with a plurality of bolt platforms on the arched arc part and the overhanging side of the supporting beam at the bottom to be connected with the secondary supporting beams 2 and 3 which are overhanging to play roles in strengthening connection and bearing load. The side is at the high temperature end of the overall environment. The height of the bolt platform, the diameter of the screw hole and the like are determined by the load borne by the whole structure and the thermal boundary conditions.

The bolt feet 8 without the support beam extending outwards are composed of a plurality of single bolt feet which extend out from the side surface of the arched connecting beam 4 facing the side without the support beam extending outwards, and the side is at the low-temperature end of the whole environment. Because the stress level at the low temperature end is small, a single bolt is adopted to install the foot to reduce the weight. The arrangement of the mounting feet without the outward extending side of the supporting beam is parallel to the positions of the mounting feet with the outward extending side of the supporting beam, so that the shear stress generated on the middle connecting beam during connection is avoided. The diameter, thickness and the like of the bolt mounting foot are determined by the load borne by the whole structure and the thermal boundary conditions.

The invention has the beneficial effects that: under the condition of reducing the weight of the high-low temperature connecting structure of the aircraft as much as possible, the wedge-shaped bolt is adopted for connecting and mounting, the problem of excessive thermal stress caused by different coefficients of thermal expansion of hot end structures such as ceramic covers and the like connected with the connecting piece can be effectively reduced, and the phenomenon of thermal mismatch between the structures is effectively reduced. Meanwhile, the supporting structural member of the secondary beam is additionally arranged, so that the capacity of bearing external force load of the connecting piece can be improved, and the strength of the high-low temperature connecting structure is integrally enhanced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the left half of the present invention;

FIG. 3 is an exploded view of the support beams of the present invention;

fig. 4 is an exploded view of the structural connecting beam and bolted joints of the present invention.

In the figure: 1, a main-stage support beam; 2 secondary arc support beams; 3 secondary bottom support beams; 4, connecting beams in an arch shape; 5, a tail end supporting beam; 6, supporting beam overhanging side bolt feet; 7 supporting beam overhanging side bolt platform; 8 there is no overhanging side bolt foot of the supporting beam.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The invention relates to an independent arch-shaped belt-supported high-low temperature connecting structure which is characterized by comprising a primary supporting beam 1, a secondary arc-shaped supporting beam 2, a secondary bottom supporting beam 3, an arch-shaped connecting beam 4, a tail end supporting beam 5, supporting beam overhanging side bolt feet 6, a supporting beam overhanging side bolt platform 7 and a non-supporting beam overhanging side bolt foot 8.

Each primary support beam 1 is respectively connected with three secondary arc support beams 2 and three secondary bottom support beams 3, and has two primary support beams 1, and two ends of each primary support beam 1 are respectively positioned at the intersection of the secondary arc support beams 2 and the three bottom support beams 3 and form a certain angle with the vertical direction. Two ends of the two main-stage connecting beams are connected with each other to form a rectangle in a surrounding mode, and the effect of mutual deformation inhibition is achieved. The shape and size of the support beam are determined by the load and thermal boundary conditions of the whole structure.

The secondary arc supporting beams 2 extend out in a fork shape at the upper end surfaces and the side surfaces of the two primary supporting beams 1, wherein every two secondary arc supporting beams extend from the end surface of each primary supporting beam 1 to the arc part of the arched connecting beam 4, and each secondary arc supporting beam extends from the side surface of each primary supporting beam 1 to the arc part bolt platform and is connected with the arc part bolt platform. The shape and size of the support beam are determined by the load and thermal boundary conditions of the whole structure.

The secondary bottom support beams 3 extend out from the bottom end faces and the side faces of the two primary support beams 1, wherein every two secondary support beams extend from the end face of each primary support beam 1 to the bottom bolt platform to be connected with the bottom bolt platform, and every secondary support beam extends from the side face of each primary support beam 1 to the bottom of the arched connecting beam 4. The shape and size of the support beam are determined by the load and thermal boundary conditions of the whole structure.

The arched connecting beam 4 is arched and is positioned between the bolt feet 6 at the overhanging side of the supporting beam and the bolt feet 8 at the overhanging side without the supporting beam, the arched arc part is vertically connected with four secondary supporting beams, and the bottom part is connected with the two secondary supporting beams at a certain angle. The shape and size of the connecting beam are determined by the load and thermal boundary conditions borne by the whole structure.

The tail end supporting beam 5 extends from the tail end of the bottom of the arched supporting beam to the high-temperature end to a bolt platform and is connected with the bolt platform to form an obliquely-placed beam. The shape and size of the support beam are determined by the load and thermal boundary conditions of the whole structure.

The bolt feet 6 at the overhanging side of the supporting beam are composed of 13 bolt feet which are extended from the side surface of the arched connecting beam 4 to the overhanging side of the supporting beam. Wherein, in the middle region of arch arc portion, adopt 4 "8" double bolt installation feet of style of calligraphy, in arch bottom region, by 4 side of arch tie-beam to the overhanging side of a supporting beam 9 single bolt installation feet that stretch out. The diameter, thickness and the like of the bolt mounting foot are determined by the load borne by the whole structure and the thermal boundary conditions.

Two bolt platforms are arranged at the arched arc part of the bolt platform 7 at the outward extending side of the supporting beam and correspond to the supporting beam 2 at the secondary arc part, and four bolt platforms are arranged at the arched bottom and correspond to the supporting beam 3 at the secondary bottom. The height of the bolt platform, the diameter of the screw hole and the like are determined by the load borne by the whole structure and the thermal boundary conditions.

The bolt foot 8 without the support beam extending outwards consists of 16 single bolt feet which extend from the side surface of the arched connecting beam 4 to the side without the support beam extending outwards. The mounting feet at the low temperature end and the mounting feet at the high temperature end are arranged in parallel, and the diameter, the thickness and the like of the bolt mounting feet are determined by the load and the thermal boundary conditions borne by the whole structure.

The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the invention patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.