阅读说明：本技术 一种高可靠性陶瓷隔热窗组件及其装配方法 (High-reliability ceramic heat insulation window assembly and assembling method thereof ) 是由 孙成功 邢政鹏 周长灵 谢青松 宋奎明 张训虎 王艳艳 段晓峰 于 2021-07-15 设计创作，主要内容包括：本发明提供一种高可靠性陶瓷隔热窗组件,包括陶瓷隔热窗主体、连接件和缓冲件；陶瓷隔热窗主体包括由侧壁、上壁围成的中空腔体及自侧壁下部外翻的翻边结构；缓冲件位于翻边结构上；连接件与缓冲件接触,可借助缓冲件压合翻边结构,连接件上设置有用于固定连接件的安装部以通过连接件压合缓冲件实现对翻边结构的压合,使隔热窗主体固定在预设固定位置。本发明通过安装部固定连接件,连接件压合缓冲件以间接压合翻边结构,实现隔热窗主体的固定,即采用连接件、翻边结构的非直接接触实现隔热窗主体的固定,避免了隔热窗与连接件机械连接形成应力集中,易造成隔热窗破损开裂的问题；缓冲件起缓冲作用,分散应力,进一步避免应力集中。(The invention provides a high-reliability ceramic heat insulation window assembly, which comprises a ceramic heat insulation window main body, a connecting piece and a buffer piece, wherein the ceramic heat insulation window main body is provided with a plurality of heat insulation windows; the ceramic heat insulation window main body comprises a hollow cavity surrounded by a side wall and an upper wall and a flanging structure outwards turned from the lower part of the side wall; the buffer piece is positioned on the flanging structure; the connecting piece is in contact with the buffering piece, the flanging structure can be pressed by the buffering piece, the mounting portion for fixing the connecting piece is arranged on the connecting piece, so that the flanging structure can be pressed by the buffering piece pressed by the connecting piece, and the heat insulation window main body is fixed at a preset fixing position. According to the invention, the connecting piece is fixed through the mounting part, and the connecting piece presses the buffer piece to indirectly press the flanging structure, so that the fixing of the heat insulation window main body is realized, namely, the fixing of the heat insulation window main body is realized by adopting the indirect contact of the connecting piece and the flanging structure, and the problem that the heat insulation window is easily damaged and cracked due to stress concentration formed by the mechanical connection of the heat insulation window and the connecting piece is avoided; the buffer piece plays a role in buffering, stress is dispersed, and stress concentration is further avoided.)

1. A high-reliability ceramic heat insulation window component is characterized by comprising a ceramic heat insulation window main body, a connecting piece and a buffer piece;

the ceramic heat insulation window main body comprises a hollow cavity and a flanging structure, wherein the hollow cavity is formed by enclosing a side wall and an upper wall, and the flanging structure is outwards turned from the lower part of the side wall;

the buffer piece is positioned on the flanging structure;

the connecting piece is in contact with the buffering piece and can press the flanging structure by means of the buffering piece, and the connecting piece is provided with an installation part for fixing the connecting piece so as to press the flanging structure by the buffering piece pressed by the connecting piece, so that the ceramic heat insulation window main body is fixed at a preset fixed position.

2. The highly reliable ceramic heat insulating window assembly according to claim 1, wherein the portion of the burring structure contacting the cushion member includes an inclined surface inclined downward, and an angle between the inclined surface and the lower surface of the burring structure is an acute angle.

3. The highly reliable ceramic heat insulating window assembly of claim 2, wherein the portion of the burring structure in contact with the cushion further comprises a vertical surface extending downward from the inclined surface.

4. The highly reliable ceramic heat insulating window assembly of claim 3, wherein the height of the burring structure is 4mm to 12mm, the thickness of the side wall is 4mm to 12mm, the ratio of the height of the burring structure to the thickness of the side wall is 1:1, the ratio of the height of the inclined surface to the vertical surface is 3:1, and the length of the lower surface of the burring structure is 1.5mm to 4 mm.

5. The highly reliable ceramic thermal window assembly of claim 2, wherein the acute angle is 63 ° -80 °.

6. The highly reliable ceramic heat insulating window assembly of claim 1, wherein the buffer member, a portion of the burring structure contacting the buffer member, and a portion of the connecting member contacting the buffer member are parallel to each other.

7. The highly reliable ceramic heat insulating window assembly of claim 1, wherein the buffer member is a silicone rubber that can withstand a service temperature of more than 200 ℃ and a shear strength of more than 1.0 MPa;

the thickness of the buffer piece is 0.3mm-1.0 mm.

8. The high reliability ceramic insulating window assembly of claim 1, wherein the ceramic insulating window body is selected from the group consisting of quartz ceramic, silicon nitride ceramic, alumina ceramic, or quartz composite; the connecting piece is made of invar, aluminum alloy, titanium alloy or stainless steel.

9. The highly reliable ceramic heat insulating window assembly of claim 1, wherein the connector has a height greater than the flange structure;

the high-reliability ceramic heat insulation window assembly further comprises a rubber gasket, and the rubber gasket is located below the flanging structure and the side wall.

10. A method of assembling a high reliability ceramic insulating window assembly, comprising the steps of:

providing a ceramic heat insulation window main body, wherein the ceramic heat insulation window main body comprises a hollow cavity surrounded by a side wall and an upper wall and a flanging structure which is outwards turned from the lower part of the side wall;

providing a buffer piece matched with the flanging structure, and bonding the buffer piece on the flanging structure;

and the ceramic heat insulation window main body is fixed at a preset fixed position by fixing the connecting piece through the installation part and realizing the press fit of the flanging structure through the connecting piece press fit buffer piece.

Technical Field

The invention relates to the technical field of heat insulation windows, in particular to a high-reliability ceramic heat insulation window assembly and an assembling method thereof.

Background

With the development of aerospace technology, the requirement of an aircraft guidance antenna heat insulation window component is more and more, and the application requirement of a low-cost and high-reliability heat insulation window component material is more and more. At present, the wave-transparent heat-insulating material used in the high-temperature field of the heat-insulating window component is a ceramic material and a composite material thereof, wherein the commonly used high-reliability wave-transparent heat-insulating window material generally adopts a quartz fiber reinforced composite material, but the defects of long preparation period, high price and the like exist, and the large-scale application of the material is limited. For this reason, the skilled person considers the use of alternative materials with high reliability, short preparation period and low cost instead of the quartz fiber reinforced composite material. The ceramic materials such as quartz ceramic, silicon nitride ceramic and the like have the advantages of short preparation period and low cost, and technicians try to replace quartz fiber reinforced composite materials with the ceramic materials such as quartz ceramic, silicon nitride ceramic and the like, but the ceramic materials have the problems of high brittleness and poor reliability, and the application and development of the ceramic materials are greatly limited.

At present, the domestic ceramic heat insulation window is generally mechanically connected with a metal connecting piece when in use, stress concentration is easily formed when the ceramic heat insulation window is connected with the metal connecting piece, and the ceramic heat insulation window is easy to damage and crack due to the inherent brittleness problem of the ceramic heat insulation window, particularly when ceramic materials such as quartz ceramics, silicon nitride ceramics and the like are used. Therefore, how to design a connection mode with low stress concentration, especially when the ceramic heat insulation window is made of brittle ceramics, solves the problem that the ceramic antenna window is easy to be stressed and damaged during engineering application, and becomes a key technology and engineering application problem to be solved urgently in the field.

Disclosure of Invention

The invention provides a high-reliability ceramic heat-insulating window assembly and an assembling method thereof, which aim to solve the problems that stress concentration is easily formed when the conventional ceramic heat-insulating window is connected with a metal connecting piece, and particularly, the ceramic heat-insulating window is easily damaged and cracked when the ceramic heat-insulating window is made of brittle ceramics.

In one aspect, the present invention provides a high reliability ceramic thermal window assembly comprising a ceramic thermal window body, a connecting member and a buffer member; the ceramic heat insulation window main body comprises a hollow cavity and a flanging structure, wherein the hollow cavity is formed by enclosing a side wall and an upper wall, and the flanging structure is outwards turned from the lower part of the side wall; the buffer piece is positioned on the flanging structure; the connecting piece is in contact with the buffering piece and can press the flanging structure by means of the buffering piece, and the connecting piece is provided with an installation part for fixing the connecting piece so as to press the flanging structure by the buffering piece pressed by the connecting piece, so that the ceramic heat insulation window main body is fixed at a preset fixed position.

Compared with the prior art, the invention has the following beneficial effects: the ceramic heat insulation window main body comprises a flanging structure, wherein the flanging structure is provided with a buffer piece, and the connecting piece is in contact with the buffer piece, so that the indirect pressing of the flanging structure can be realized by means of the buffer piece. The connecting piece is provided with an installation part for fixing the connecting piece, and when the connecting piece is fixed through the installation part, the connecting piece can press the buffer piece and realize the fixation of the ceramic heat insulation window main body at a preset fixed position by means of the indirect pressing flanging structure of the buffer piece. Therefore, the fixing of the connecting piece is realized through the mounting part, the connecting piece is pressed with the buffer piece to indirectly press the flanging structure, the fixing of the ceramic heat insulation window main body is realized by adopting the indirect contact of the connecting piece and the flanging structure, and the problems that the stress concentration is caused by the mechanical connection of the existing ceramic heat insulation window and the metal connecting piece and the breakage and cracking of the ceramic heat insulation window are easily caused no matter the ceramic heat insulation window adopts brittle ceramics or other materials can be avoided. In addition, the buffer piece is positioned between the connecting piece and the flanging structure, the connecting piece is not directly contacted with the flanging structure, the buffer piece plays a buffer role, the acting force between the connecting piece and the flanging structure is buffered, and the possibility of stress damage of the ceramic heat insulation window is reduced.

In some embodiments of the present invention, a portion of the edge-folding structure contacting the buffer member includes an inclined surface inclined downward, and an included angle between the inclined surface and a lower surface of the edge-folding structure is an acute angle.

Adopt above-mentioned further technical scheme's beneficial effect to lie in, the flange structure of ceramic heat insulating window main part sets up the inclined plane with the part of bolster contact, especially when the contained angle between inclined plane and flange structure's the lower surface is the acute angle, compare with plane flange structure, inclined plane flange structure has bigger stress surface, under the effect of exerting equal size stress, inclined plane structure atress is littleer, can effectively reduce the effort that flange structure received, effectively reduce stress concentration, protection flange structure, avoid ceramic heat insulating window main part to damage.

In some embodiments of the present invention, the portion of the burring structure in contact with the cushion further includes a vertical surface extending downward from the inclined surface.

Adopt above-mentioned further technical scheme's beneficial effect to lie in, the part of turn-ups structure and bolster contact comprises inclined plane and perpendicular, and the inclined plane enlarges turn-ups structure's lifting surface area and provides certain turn-ups structure thickness, and turn-ups structure's thickness is further guaranteed to the perpendicular, and then increases turn-ups structure's atress ability, prevents that turn-ups structure atress from damaging.

In some embodiments of the invention, the height of the edge-upturning structure is 4mm-12mm, the thickness of the side wall is 4mm-12mm, the ratio of the height of the edge-upturning structure to the thickness of the side wall is 1:1, the ratio of the height of the inclined surface to the vertical surface is 3:1, and the length of the lower surface of the edge-upturning structure is 1.5mm-4 mm.

The ceramic heat insulation window assembly has the advantages that when the ratio of the height of the flanging structure to the thickness of the side wall is 1:1, on one hand, the stress capability of the flanging structure can be guaranteed, the flanging structure is prevented from being damaged due to stress, on the other hand, the connecting piece, the buffering piece and the flanging structure are easy to fix, the phenomenon that the flanging structure is too thick and too high, so that the structure of the ceramic heat insulation window assembly is heavy is avoided, materials are saved, and cost is saved.

In some embodiments of the invention, the acute angle is 63 ° to 80 °.

The ceramic heat insulation window has the advantages that the included angle between the inclined plane and the lower surface of the flanging structure is 63-80 degrees, the stress area of the flanging structure in the angle range meets the actual requirement, the decomposition effect on acting force, stress and the like between the connecting piece and the flanging structure is good, and the stress damage of the ceramic heat insulation window main body can be greatly reduced.

In some embodiments of the present invention, the buffer member, the portion of the burring structure contacting the buffer member, and the portion of the connecting member contacting the buffer member are parallel to each other.

Adopt above-mentioned further technical scheme's beneficial effect to lie in, the part of bolster, flanging structure and bolster contact, the part of connecting piece and bolster contact are parallel to each other, and the three contact segment shape is unanimous promptly, makes things convenient for the zonulae occludens of bolster, flanging structure and connecting piece, and then makes things convenient for the pressfitting of connecting piece to bolster and flanging structure, increases connection stability.

In some embodiments of the present invention, the buffer is silicone rubber, which can withstand a service temperature of more than 200 ℃ and a shear strength of more than 1.0 MPa; the thickness of the buffer piece is 0.3mm-1.0 mm.

The technical scheme has the advantages that the connecting piece is bonded with the flanging structure by the silicon rubber, and the silicon rubber connection can avoid stress concentration caused by direct connection of the connecting piece and the flanging structure, effectively buffer acting force between the connecting piece and the flanging structure and reduce stress damage of the flanging structure; in addition, the thermal stress caused by the difference of the thermal expansion coefficients of the connecting piece and the flanging structure can be effectively reduced by the connection of the silicon rubber, and the damage of the flanging structure is prevented. The silicon rubber can bear the service temperature of more than 200 ℃, belongs to high-temperature resistant silicon rubber, can be guaranteed to be suitable for high-temperature environment, has the shear strength of more than 1.0MPa, and can improve the reliability of the bonding strength. The thickness of the buffer piece (high-temperature-resistant silicon rubber), namely the gap between the connecting piece and the flanging structure, is strictly controlled to be 0.3-1.0 mm, the buffer stress is not facilitated if the gap is too small, the bonding strength can be reduced if the gap is too large, and the range of 0.3-1.0 mm is selected, so that the mechanical force and the thermal stress between the connecting piece and the flanging structure can be effectively buffered, the damage caused by overload stress of ceramic is avoided, and the bonding strength can be ensured.

In some embodiments of the invention, the ceramic thermal window body is selected from a quartz ceramic, a silicon nitride ceramic, an alumina ceramic, or a quartz composite; the connecting piece is made of invar, aluminum alloy, titanium alloy or stainless steel.

The ceramic heat insulation window main body is made of quartz ceramics, silicon nitride ceramics, alumina ceramics or quartz composite materials, namely the ceramic heat insulation window main body can be made of brittle ceramics or other ceramics, and even if the brittle ceramics are selected, the ceramic heat insulation window main body is not easy to be damaged due to stress. The connecting piece is made of invar steel, aluminum alloy, titanium alloy or stainless steel, and the connecting piece is made of a material which is not limited to a special material, so that the cost is saved, and the material practicability is improved.

In some embodiments of the invention, the height of the connector is greater than the flange structure; the high-reliability ceramic heat insulation window assembly further comprises a rubber gasket, and the rubber gasket is located below the flanging structure and the side wall.

Adopt above-mentioned further technical scheme's beneficial effect to lie in, the connecting piece highly is greater than flange structure, below at flange structure and lateral wall sets up the rubber gasket, the thickness of rubber gasket just in time can realize flange structure with the help of the indirect pressfitting of rubber gasket when making connecting piece pressfitting bolster, fix in predetermineeing the fixed position with the help of the indirect pottery heat insulating window main part that makes of rubber gasket, flange structure promptly, the below of lateral wall and predetermine and possess the rubber gasket between the fixed position, the rubber gasket plays the effect of cushioning effect, avoid flange structure, the lateral wall produces the rigidity stress with predetermineeing fixed position direct contact, reduce the possibility of pottery heat insulating window subassembly atress damage.

In another aspect, the present invention further provides an assembling method of a high-reliability ceramic heat insulation window assembly, including the steps of: providing a ceramic heat insulation window main body, wherein the ceramic heat insulation window main body comprises a hollow cavity surrounded by a side wall and an upper wall and a flanging structure which is outwards turned from the lower part of the side wall; providing a buffer piece matched with the flanging structure, and bonding the buffer piece on the flanging structure; and the ceramic heat insulation window main body is fixed at a preset fixed position by fixing the connecting piece through the installation part and realizing the press fit of the flanging structure through the connecting piece press fit buffer piece.

Compared with the prior art, the invention has the following beneficial effects: according to the assembling method, the buffer piece is bonded on the flanging structure, so that the connecting piece is contacted with the buffer piece to realize the indirect pressing of the flanging structure by the buffer piece, the fixing of the connecting piece is realized through the mounting part arranged on the connecting piece when the assembling method is used, then the connecting piece presses the buffer piece and indirectly presses the flanging structure by the buffer piece, the fixing of the ceramic heat insulation window main body at the preset fixing position is realized, and the assembling method is simple. The ceramic heat insulation window assembly assembled by the assembly method adopts the connecting piece and the flanging structure to realize the fixation of the ceramic heat insulation window main body in a non-direct contact manner, and the problems that the ceramic heat insulation window is damaged and cracked easily due to stress concentration caused by the mechanical connection of the existing ceramic heat insulation window and the metal connecting piece can be avoided no matter the ceramic heat insulation window adopts brittle ceramics or other materials. In addition, the buffer piece is located between the connecting piece and the flanging structure, plays a role in buffering, buffers acting force between the connecting piece and the flanging structure, reduces the possibility of stress damage of the ceramic heat insulation window, and is high in reliability and long in service life.

Drawings

In order to more clearly illustrate the technical solution in the embodiment of the present invention, the drawings required to be used in the embodiment of the present invention will be described below.

FIG. 1 is a schematic structural view of a high reliability ceramic insulating window assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a high reliability ceramic heat insulating window assembly according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of various aspects of the present invention is provided with specific examples, which are only used for illustrating the present invention and do not limit the scope and spirit of the present invention.

Example 1:

the present embodiment provides a ceramic heat insulating window assembly with high reliability. Fig. 1 is a schematic view showing the structure of a highly reliable ceramic heat insulating window assembly of the present embodiment.

As shown in fig. 1, the high reliability ceramic heat insulating window assembly of the present embodiment includes a ceramic heat insulating window main body 1, a connecting member 2, and a buffer member 3. The ceramic heat insulation window main body 1 comprises a hollow cavity surrounded by a side wall 11 and an upper wall 12 and a flanging structure 13 outwards turned from the lower part of the side wall 11; the buffer piece 3 is positioned on the flanging structure 13; the connecting piece 2 is in contact with the buffer piece 3, the flanging structure 13 can be pressed by the buffer piece 3, and the connecting piece 2 is provided with an installation part 21 for fixing the connecting piece 2 so as to press the buffer piece 3 through the connecting piece 2 to realize the pressing of the flanging structure 13, so that the ceramic heat-insulating window main body 1 is fixed at the preset fixing position 4. In the present embodiment, the side wall 11 represents a portion indicated by the icon 11 enclosed by the solid dotted line in fig. 1, the burring structure 13 represents a portion indicated by the icon 13 enclosed by the solid dotted line and the cushioning member 3 in fig. 1, the lower portion of the side wall 11 represents not the bottom surface (lower surface) of the side wall 11 but a portion of the side wall 11 away from the upper wall 12 and close to the predetermined fixing position 4, and it can be understood that the side wall 11 includes an upper portion and a lower portion, the upper surface of the upper portion is connected to the upper wall 12, the lower surface of the upper portion is connected to the upper surface of the lower portion, and the lower surface of the lower portion is in contact with the predetermined fixing position 4. In the present embodiment, the specific structure of the mounting portion is not limited, and in the present embodiment, the mounting portion 21 is a mounting hole penetrating through the upper and lower surfaces of the connecting member 2, and the bolt 5 passes through the mounting hole (mounting portion 21) to fix the connecting member 2.

In the present embodiment, the portion of the burring structure 13 contacting the cushion 3 includes an inclined surface 131 inclined downward, and an included angle α between the inclined surface 131 and a lower surface 132 of the burring structure 13 is an acute angle. Preferably, in this embodiment, the acute angle is 63 ° to 80 °. The portion of the burring 13 in contact with the cushion 3 further includes a vertical surface 133 extending downward from the inclined surface 131. The height of the flanging structure 13 is 4mm-12mm, the thickness of the side wall 11 is 4mm-12mm, the ratio of the height of the flanging structure 13 to the thickness of the side wall 11 is 1:1, the height ratio of the inclined surface 131 to the vertical surface 133 is 3:1, and the length of the lower surface 132 of the flanging structure 13 is 1.5mm-4 mm. In the present embodiment, the height refers to the dimension perpendicular to the direction of the predetermined fixing position 4, the thickness refers to the dimension parallel to the direction of the predetermined fixing position 4, and the length of the lower surface 132 of the flange structure 13 refers to the dimension parallel to the direction of the predetermined fixing position 4 of the lower surface 132.

In the present embodiment, the buffer member 3, the portion of the burring 13 contacting the buffer member 3, and the portion of the connecting member 2 contacting the buffer member 3 are parallel to each other. The buffer part 3 is made of silicon rubber, the silicon rubber can bear the use temperature of more than 200 ℃, is high-temperature resistant silicon rubber, and has the shearing strength of more than 1.0 MPa; the thickness of the buffer member 3 is 0.3mm-1.0 mm.

In this embodiment, the ceramic heat insulation window body 1 is made of quartz ceramic, silicon nitride ceramic, alumina ceramic or quartz composite material, and the connecting member 2 is made of invar, aluminum alloy, titanium alloy or stainless steel.

The present embodiment further provides an assembling method of the high-reliability ceramic heat insulation window assembly of the present embodiment, including the following steps:

providing a ceramic heat insulation window main body 1 which comprises a hollow cavity enclosed by a side wall 11 and an upper wall 12 and a flanging structure 13 turning outwards from the lower part of the side wall 11;

providing a buffer member 3 matched with the flanging structure 13, and bonding the buffer member 3 on the flanging structure 13;

the connecting piece 2 which is matched with the buffer piece 3 and is provided with the mounting part 21 is provided, the connecting piece 2 is contacted with the buffer piece 3, the connecting piece 2 is fixed through the mounting part 21, the buffer piece 3 is pressed through the connecting piece 2 to realize pressing of the flanging structure 13, and the ceramic heat insulation window main body 1 is fixed at the preset fixing position 4.

Example 2:

the present embodiment provides a ceramic heat insulating window assembly with high reliability. Fig. 2 is a schematic view showing the structure of the high-reliability ceramic heat insulating window assembly of the present embodiment.

The high-reliability ceramic heat insulating window assembly of the present embodiment is different from embodiment 1 only in that: the height of the connecting piece 2 'is larger than that of the flanging structure 13'; the high-reliability ceramic heat insulation window assembly further comprises a rubber gasket 6 ', and the rubber gasket 6 ' is positioned below the flanging structure 13 ' and the side wall. Other parts of the high-reliability ceramic heat insulation window assembly of the present embodiment are the same as those of embodiment 1, and are not described herein again.

The present embodiment further provides an assembling method of the high-reliability ceramic heat insulation window assembly of the present embodiment, including the following steps:

providing a ceramic heat insulation window main body, wherein the ceramic heat insulation window main body comprises a hollow cavity formed by enclosing a side wall and an upper wall and a flanging structure 13' outwards turned from the lower part of the side wall;

providing a buffer part matched with the flanging structure 13 ', and bonding the buffer part on the flanging structure 13';

providing a connecting piece 2 'matched with the buffer piece and provided with a mounting part 21';

providing a rubber gasket 6 'matched with the flanging structure 13' and the lower surfaces of the side walls, and bonding the rubber gasket 6 'to the flanging structure 13' and the lower surfaces of the side walls;

the connecting piece 2 ' is contacted with the buffer piece, the connecting piece 2 ' is fixed through the mounting part 21 ', the indirect pressing of the flanging structure 13 ' by means of the rubber gasket 6 ' is just realized when the connecting piece 2 ' presses the buffer piece, and the ceramic heat insulation window main body is indirectly fixed at the preset fixed position by means of the rubber gasket 6 '.

The present invention has been described in conjunction with specific embodiments which are intended to be exemplary only and are not intended to limit the scope of the invention, which is to be given the full breadth of the appended claims and any and all modifications, variations or alterations that may occur to those skilled in the art without departing from the spirit of the invention. Therefore, various equivalent changes made according to the present invention still fall within the scope covered by the present invention.