CN212229285U - High-stability frame embedded structural part and high-stability supporting frame - Google Patents
High-stability frame embedded structural part and high-stability supporting frame Download PDFInfo
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- CN212229285U CN212229285U CN202020632283.2U CN202020632283U CN212229285U CN 212229285 U CN212229285 U CN 212229285U CN 202020632283 U CN202020632283 U CN 202020632283U CN 212229285 U CN212229285 U CN 212229285U
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Abstract
The utility model belongs to the technical field of space optics remote sensing, a high stability frame embedded structure spare and high stability braced frame are related to. The problems that a traditional carbon fiber support frame is poor in stability, the local rigidity of a support structure is insufficient and the like are solved, and the embedded structural part comprises an upper connecting seat, a sleeve and a lower connecting seat; the upper connecting seat and the lower connecting seat are made of titanium alloy, and the sleeve is made of carbon fiber material; the upper connecting seat and the lower connecting seat are respectively fixed at two ends of the sleeve; the upper connecting seat and the lower connecting seat are provided with glue injection holes. The supporting frame comprises a frame body, the frame body is provided with a pre-buried hole penetrating through the top and the bottom, and the sleeve penetrates through the pre-buried hole and is positioned in a cavity of the frame body; the upper connecting seat and the lower connecting seat are in lap joint at the top and the bottom of the frame body, and the frame embedded structural member is fixed on the supporting frame by injecting glue into the glue injection hole. The frame embedded structural member is embedded in the supporting frame, so that the rigidity and stability of the supporting frame and the whole truss structure are improved.
Description
Technical Field
The utility model belongs to the technical field of space optics remote sensing, a high stability frame embedded structure spare and high stability braced frame are related to.
Background
The main support structure of the space optical remote sensor is generally required to have sufficiently high dynamic and static rigidity, good thermal dimensional stability and the like. Truss structures are widely used due to their superior spatial properties, such as high specific stiffness, flexibility in assembly, etc., and their configurations generally adopt a form of combining a support frame with a support truss rod. The traditional support frame is made of titanium alloy materials, the titanium alloy has high rigidity and stable mechanical property, and has obvious advantages when being applied to a small optical remote sensor; however, as the optical remote sensor gradually develops toward a long focal length and a large size, the defects of large quality and poor thermal stability of the titanium alloy are gradually highlighted.
In recent years, in a large off-axis optical system, the axial (vertical to the upper end face/lower end face of the frame) dimensional stability requirement of a mass-based support system of several meters reaches even the micrometer level. Therefore, the carbon fiber composite material is increasingly used for replacing titanium alloy and is used as a main material of the support frame, and the carbon fiber composite material is light in weight, small in linear expansion coefficient and has great advantages in practical application. Meanwhile, the following disadvantages exist: 1) when the support frame is integrally manufactured by adopting the carbon fiber composite material, the high axial dimensional stability of the support frame is difficult to ensure due to the complex layering angle, the influence on the main support structure of the small remote sensor is small, but the influence on a truss system with the meter level cannot be ignored; 2) in order to meet the use requirement of high rigidity, complex reinforcing ribs are often required to be arranged in the carbon fiber support frame, so that the manufacturing complexity is increased; 3) the dimensional tolerance of the structural part formed by the carbon fiber composite material is large, and the continuity of the fiber yarns can be damaged by machining the surface of the carbon fiber, so that the positioning precision of the axial dimension of the support frame is difficult to ensure.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high stability frame embedded structure and high stability braced frame, the purpose is solved traditional carbon fiber braced frame stability relatively poor, the not enough scheduling problem of bearing structure local rigidity.
The technical scheme of the utility model a pre-buried structure of high stability frame is provided, its special character lies in: comprises an upper connecting seat, a sleeve and a lower connecting seat; the upper connecting seat and the lower connecting seat are made of titanium alloy, and the sleeve is made of carbon fiber material; the upper connecting seat and the lower connecting seat are respectively fixed at two ends of the sleeve; and the upper connecting seat and the lower connecting seat are provided with glue injection holes.
Furthermore, the upper connecting seat and the lower connecting seat have the same structure and comprise a frame connecting flange and a nesting end, and the nesting end is sleeved with the sleeve and is bonded on the sleeve; the glue injection hole is positioned on the frame connecting flange.
Furthermore, in order to reduce the weight of the frame embedded structural part as much as possible, the upper connecting seat and the lower connecting seat are subjected to weight reduction design, and specifically, weight reduction holes are formed in the frame connecting flange.
Furthermore, the upper connecting seat and the lower connecting seat are both processed by TC 4; the sleeve is formed by winding an M55J carbon fiber composite material, and the cross section of the sleeve is in a round-corner rectangular shape.
The utility model also provides a high stability braced frame, including carbon-fibre composite's frame body, its special character lies in: the frame embedded structure also comprises the frame embedded structure; the frame body is provided with a pre-buried hole penetrating through the top and the bottom, and the sleeve penetrates through the pre-buried hole and is positioned in the cavity of the frame body; the upper connecting seat and the lower connecting seat are in lap joint with the top and the bottom of the frame body, and glue is injected into the glue injection holes to form a glue layer, so that the frame embedded structural member is completely fixed on the supporting frame.
Furthermore, the upper connecting seat and the lower connecting seat have the same structure and comprise a frame connecting flange and a nesting end, and the nesting end is sleeved with the sleeve and is bonded on the sleeve; the glue injection hole is positioned on the frame connecting flange; the sleeve and the nesting end pass through the pre-buried hole and are positioned in the cavity of the frame body, and the frame connecting flange is lapped at the top and the bottom of the frame body.
Furthermore, lightening holes are formed in the frame connecting flange.
Furthermore, the upper connecting seat and the lower connecting seat are both processed by TC 4; the sleeve is formed by winding an M55J carbon fiber composite material, and the cross section of the sleeve is in a round-corner rectangle shape; through the layer design of the carbon fiber composite material, the linear expansion coefficient of the sleeve is designed to be a negative number, the value of the linear expansion coefficient is determined by calculation according to the axial length of the upper connecting seat, the axial length of the lower connecting seat, the length of the sleeve and the linear expansion coefficient of the titanium alloy, and finally the axial average linear expansion coefficient of the frame embedded structural member approaches to zero or is zero.
Coefficient of linear expansion alpha of the sleeve (3)Sleeve barrelCalculated by the following formula:
wherein L isOn the upper partIs the axial length of the upper connecting seat, LLower partIs the axial length, alpha, of the lower connecting socketTC4Is the linear expansion coefficient, L, of the titanium alloySleeve barrelIs the length of the sleeve.
The utility model discloses still disclose a high stability braced frame's mounting method, including following step:
the method comprises the following steps: sleeving the nesting end of the upper connecting seat at one end of the sleeve, and bonding through a bonding agent to finish curing;
step two: placing the assembly completed in the step one to a corresponding pre-buried hole position of the support frame, injecting glue into a gap between a frame connecting flange of the upper connecting seat and the top of the support frame through the glue injection hole, and completing curing;
step three: turning over the support frame, coating adhesive on the side surface of the nesting end of the lower connecting seat, sleeving the lower connecting seat to the other end of the sleeve, and curing at normal temperature;
step four: injecting glue into the gap between the frame connecting flange of the lower connecting seat and the bottom of the supporting frame through the glue injection hole, and curing.
Further, in order to ensure that the thickness of the glue layer is uniform, in the second step and the fourth step, thin wires with set diameters or metal sheets with set thicknesses are placed between the frame connecting flange of the upper connecting seat and the frame connecting flange of the lower connecting seat and the supporting frame before glue injection.
The utility model has the advantages that:
1. the utility model bonds the titanium alloy upper connecting seat, the titanium alloy lower connecting seat and the carbon fiber sleeve into a whole to form a frame embedded structural member; the linear expansion coefficient of the carbon fiber sleeve is tuned through the layer design, so that the axial average linear expansion coefficient of the embedded structural member approaches to zero, and the axial size stability of the embedded structural member is improved; the embedded part combines two high-rigidity structural parts, can realize the high-rigidity design of the embedded structure, and avoids the arrangement of complex reinforcing ribs in the supporting frame. Therefore, the frame embedded structural part is embedded in the carbon fiber support frame, so that the rigidity and stability of the support frame and the whole truss structure are improved.
2. The utility model discloses the pre-buried structural member terminal surface of frame has good machining performance, has guaranteed the accuracy of braced frame axial dimensions location.
Drawings
FIG. 1 is an axial view of a high stability frame pre-buried structural member;
FIG. 2 is a cross-sectional view of a high stability frame pre-buried structure;
FIG. 3 is a schematic structural view of the upper and lower connecting seats;
FIG. 4 is a sectional view of an assembly structure of a frame embedded structural member and a support frame;
fig. 5 is an axial view of an assembly structure of the frame embedded structural member and the support frame.
The reference numbers in the figures are: 1-upper connecting seat, 2-lower connecting seat, 3-sleeve, 4-adhesive, 5-supporting frame, 6-adhesive layer, 10-frame embedded structural member, 101-frame connecting flange, 102-embedding end and 103-glue injection hole.
Detailed Description
The invention is further described with reference to the following drawings and specific embodiments.
The utility model discloses a core thought is: the linear expansion coefficient of the carbon fiber material sleeve is tuned through the carbon fiber composite material layer design, so that the frame embedded structural part formed by bonding the carbon fiber material sleeve and the titanium alloy connecting seat has excellent dimensional stability. The sleeve and the connecting seat are high-rigidity single structural members, and the high-rigidity design of the embedded structure is guaranteed. The frame embedded structural member is integrally embedded into the carbon fiber support frame, so that the rigidity and stability of the support frame and the whole truss structure are improved. Meanwhile, the end face of the frame embedded structural part has good machining performance, and the accuracy of positioning the axial dimension of the support frame can be ensured.
The following detailed description is to be read in connection with the accompanying drawings and the specific embodiments.
Referring to fig. 1 and 2, the high-stability frame embedded structural member of the embodiment includes an upper connecting seat 1 made of a titanium alloy material, a sleeve 3 made of a carbon fiber material, and a lower connecting seat 2 made of a titanium alloy material. Wherein the upper connecting seat 1 and the lower connecting seat 2 are both processed by TC 4; the sleeve 3 is formed by winding an M55J carbon fiber composite material, and the cross section of the sleeve is in a round-corner rectangular shape. The upper connecting seat 1 and the lower connecting seat 2 are bonded at two ends of the sleeve 3 through the adhesive 4 to form a frame embedded structural member 10. The upper connecting seat 1 and the lower connecting seat 2 are structurally shown in fig. 3 and comprise a frame connecting flange 101, a nesting end 102 and a glue injection hole 103, wherein the nesting end 102 is sleeved with the carbon fiber sleeve 3 and is bonded through a bonding agent 4; as can be seen from the figure, in the present embodiment, the sleeve end 102 is provided with an annular gap along the circumferential direction of the outer wall, and the two ends of the sleeve 3 are matched and bonded with the gap. The glue injection hole 103 is formed in the frame connecting flange 101, and in order to reduce the weight of the frame embedded structural member 10 as much as possible, weight reduction design is performed on the upper connecting seat 1 and the lower connecting seat 2.
As shown in fig. 4 and 5, in order to assemble the frame embedded structural member to the supporting frame, an embedded hole penetrating through the top and the bottom is formed on the frame body, and the sleeve 3 and the embedded end 102 penetrate through the embedded hole and are located in the cavity of the frame body; the frame connection flange 101 is overlapped on the top and bottom of the frame body. Glue is injected into the glue injection holes 103, so that glue layers are formed at the top and the bottom of the frame connecting flange 101 and the frame body, and the frame embedded structural member 10 is completely fixed on the support frame. The linear expansion coefficient alpha of the sleeve 3 is designed by the laying layer of the carbon fiber composite materialSleeve barrelDesigned as a negative number, the value of which is based on the axial length L of the upper connecting seatOn the upper partAxial length L of lower connecting seatLower partLength L of sleeveSleeve barrelAnd linear expansion coefficient alpha of titanium alloyTC4And (4) calculating and determining, and finally enabling the axial average linear expansion coefficient of the frame embedded structural member to be close to zero or zero.
The frame embedded structural part 10 is embedded into the carbon fiber supporting frame 5 through the following steps:
the method comprises the following steps: bonding the titanium alloy upper connecting seat 1 with the carbon fiber sleeve 2 to finish curing;
step two: placing the assembly completed in the first step into a corresponding pre-buried hole position of the support frame 5, placing a thin wire with a certain diameter or a metal sheet with a certain thickness between a frame connecting flange of the upper connecting seat and the top of the support frame, injecting glue into a gap between the titanium alloy upper connecting seat 1 and the support frame 5 through the glue injection hole 103, and completing solidification;
step three: turning over the supporting frame 5, smearing the adhesive 4 on the side surface of the nesting end 102 of the titanium alloy lower connecting seat 2, sleeving the side surface to the other side of the carbon fiber sleeve 3, and completing curing at normal temperature;
step four: thin wires with a certain diameter or metal sheets with a certain thickness are placed between the frame connecting flange of the lower connecting seat and the bottom of the supporting frame, glue is injected into the gap between the titanium alloy lower connecting seat 2 and the supporting frame through the glue injection hole 103, and the embedding and the installation of the frame embedded structural member 10 are completed after solidification.
The above description is a preferred embodiment of the present invention, and it is obvious to those skilled in the art that various modifications and improvements can be made, and these modifications and improvements belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a pre-buried structure of high stability frame which characterized in that: comprises an upper connecting seat (1), a sleeve (3) and a lower connecting seat (2); the upper connecting seat (1) and the lower connecting seat (2) are made of titanium alloy, and the sleeve (3) is made of carbon fiber composite material; the upper connecting seat (1) and the lower connecting seat (2) are respectively fixed at two ends of the sleeve (3); and the upper connecting seat (1) and the lower connecting seat (2) are provided with glue injection holes (103).
2. The embedded structural member of the high-stability frame as claimed in claim 1, wherein: the upper connecting seat (1) and the lower connecting seat (2) are identical in structure and comprise a frame connecting flange (101) and a nesting end (102), and the nesting end (102) is sleeved and bonded at the end part of the sleeve (3); the glue injection hole (103) is positioned on the frame connecting flange (101).
3. The embedded structural member of the high-stability frame as claimed in claim 2, wherein: a lightening hole is formed in the frame connecting flange (101);
the upper connecting seat (1) and the lower connecting seat (2) are both processed by TC 4; the sleeve (3) is formed by winding M55J carbon fiber composite materials, and the cross section of the sleeve (3) is in a round-corner rectangular shape.
4. The utility model provides a high stability braced frame, includes carbon-fibre composite's frame body which characterized in that: the frame pre-buried structure of claim 1; the frame body is provided with a pre-buried hole penetrating through the top and the bottom, and the sleeve (3) penetrates through the pre-buried hole and is positioned in the cavity of the frame body; go up connecting seat (1) and connecting seat (2) overlap joint at the top and the bottom of frame body down, form glue film (6) through annotating the gel into injecting the gluey hole (103), make the pre-buried structure of frame fix completely on braced frame.
5. The high stability support frame of claim 4, wherein: the upper connecting seat (1) and the lower connecting seat (2) are identical in structure and comprise a frame connecting flange (101) and a nesting end (102), and the nesting end (102) is sleeved with the sleeve (3) and bonded to the sleeve (3); the glue injection hole (103) is positioned on the frame connecting flange (101); the sleeve (3) and the embedded end (102) penetrate through the embedded hole to be located in the cavity of the frame body, and the frame connecting flange (101) is lapped on the top and the bottom of the frame body.
6. The high stability support frame of claim 5, wherein: and lightening holes are formed in the frame connecting flange (101).
7. The high stability support frame of claim 6, wherein: the upper connecting seat (1) and the lower connecting seat (2) are both processed by TC 4; the sleeve (3) is formed by winding an M55J carbon fiber composite material, and the cross section of the sleeve (3) is in a round-corner rectangular shape; the linear expansion coefficient of the sleeve (3) is a negative value, and the axial average linear expansion coefficient of the frame embedded structural member is zero.
8. The high stability support frame of claim 7, wherein: coefficient of linear expansion alpha of the sleeve (3)Sleeve barrelCalculated by the following formula:
wherein L isOn the upper partIs the axial length of the upper connecting seat, LLower partIs the axial length, alpha, of the lower connecting socketTC4Is the linear expansion coefficient, L, of the titanium alloySleeve barrelIs the length of the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020632283.2U CN212229285U (en) | 2020-04-23 | 2020-04-23 | High-stability frame embedded structural part and high-stability supporting frame |
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| CN202020632283.2U CN212229285U (en) | 2020-04-23 | 2020-04-23 | High-stability frame embedded structural part and high-stability supporting frame |
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| CN212229285U true CN212229285U (en) | 2020-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458827A (en) * | 2020-04-23 | 2020-07-28 | 中国科学院西安光学精密机械研究所 | High-stability frame embedded structural part, high-stability support frame and mounting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458827A (en) * | 2020-04-23 | 2020-07-28 | 中国科学院西安光学精密机械研究所 | High-stability frame embedded structural part, high-stability support frame and mounting method |
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