CN115903170A - Double-shaft flexible supporting structure of large-caliber strip-shaped reflector - Google Patents
Double-shaft flexible supporting structure of large-caliber strip-shaped reflector Download PDFInfo
- Publication number
- CN115903170A CN115903170A CN202211531405.9A CN202211531405A CN115903170A CN 115903170 A CN115903170 A CN 115903170A CN 202211531405 A CN202211531405 A CN 202211531405A CN 115903170 A CN115903170 A CN 115903170A
- Authority
- CN
- China
- Prior art keywords
- double
- flexible
- shaft
- supporting unit
- flexible supporting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910001374 Invar Inorganic materials 0.000 claims abstract description 50
- 235000014676 Phragmites communis Nutrition 0.000 claims description 43
- 239000000758 substrate Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 abstract description 10
- 230000005484 gravity Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 18
- 239000000306 component Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a double-shaft flexible supporting structure of a large-caliber strip-shaped reflector, wherein a plurality of double-shaft flexible spring band hinges are uniformly distributed in the circumferential direction of a double-shaft flexible supporting unit positioned in a virtual section formed by an invar taper sleeve end, the double-shaft flexible supporting unit is provided with a horizontal flexible wire groove extending along the virtual section and used for communicating two adjacent double-shaft flexible spring band hinges, the double-shaft flexible supporting structure takes the double-shaft flexible spring band hinges and the horizontal flexible wire groove as main stress eliminating structures and is integrated on a large-caliber strip-shaped reflector assembly, the acting force acting on the flexible supporting structure can be transmitted to the horizontal flexible wire groove, the deformation of the horizontal flexible wire groove is taken as a main means for eliminating stress, the acting force is prevented from being continuously transmitted to the large-caliber strip-shaped reflector body, the stress concentration of the reflector under the action of gravity is reduced, and the surface shape precision of the reflector is ensured not to exceed the tolerance value of optical design.
Description
Technical Field
The invention relates to the technical field of space optical remote sensing, in particular to a double-shaft flexible supporting structure of a large-caliber long-strip-shaped reflector.
Background
The space optical remote sensor as a precise optical remote sensing system has been widely applied in the aspects of earth landform surveying and mapping, earth resource surveying, outer space astronomy and planet observation, national defense information general survey and the like. The reflector is used as a core component element of the space optical remote sensor, and the mounting and positioning precision and the supporting surface shape precision of the reflector have great influence on the imaging quality of an optical system. In order to reduce the weight of the mirror, reduce the carrying and transmitting costs and increase the first-order natural frequency of the mirror, the primary mirror of the space optical remote sensor must be designed to be light-weighted. However, the light weight design of the reflector can reduce the absolute rigidity of the reflector body, and the surface shape precision of the reflector surface is reduced due to the influence of gravity release, thermal load and assembly stress. Therefore, the space reflector needs to have a support structure with good performance to reduce the deterioration of the surface shape precision of the reflector caused by the above bad factors and improve the imaging quality of the space optical remote sensor.
The traditional circular reflector supporting modes comprise a peripheral support, a side support, a back center support, a back multi-point support and the like. If the peripheral support is applied to the reflector by taking the back surface or the outer edge of the reflector as a reference, the peripheral support can keep better surface shape precision, but can generate more serious mirror surface deformation when being used on a long reflector with a larger caliber. The side support is a Bipod type support in a common flexible structure, the support is in a flexible design and has higher axial and radial rigidity, but the support needs to be arranged on the side surface of the long strip-shaped reflector to increase the envelope size of the remote sensor; the back center type supporting mode is only suitable for supporting a small reflector and a ground reflector, and the supporting mode is not suitable for a large-caliber long strip reflector.
The patent publication No. CN102902042A is a Chinese invention patent named as 'a composite flexible supporting structure of a large-aperture reflector'. Referring to the attached drawing 1, the flexible supporting structure comprises a small bonding surface taper sleeve E bonded with the reflector in a small area, and a composite flexible supporting rod D connected with a reflector back plate; the small bonding surface taper sleeve E is connected with the composite flexible supporting rod D through a screw, two layers of flexible structures including an L-shaped groove and an annular groove are arranged on the composite flexible supporting rod D, the 4L-shaped grooves are parallel along the circumference of the composite flexible supporting rod D, and an included angle of 60 degrees is formed between the rear section and the axis; the inner and outer annular grooves F, G are all composed of 4 sections of arc-shaped grooves which are uniformly distributed along the circumference and have the same width and radian. The flexible support effectively reduces the mirror surface deformation under the influence of gravity and thermal load, and meanwhile, the small bonding surface I ensures the mirror surface shape precision under the bonding residual stress. But has the following disadvantages: the flexibility of the L-shaped groove and the annular groove is not large enough, so that the flexible deformation generated when the external stress such as the gravity, the external vibration, the thermal load and the like of the large-aperture reflector is large is small, and a part of stress is possibly transmitted to the reflector body to generate serious mirror deformation; on the other hand, the bonding surface I is too small, and the bonding surface of the taper sleeve and the blind hole of the reflector in the bonding process is adjusted and expanded in consideration of the problems that the adhesive is possibly smeared unevenly and volatilizes in space.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a double-shaft flexible supporting structure for a large-caliber long-strip reflector, which can solve the problem of back support of the large-caliber long-strip reflector of a space optical remote sensor, eliminate the influence of assembly profit and gravity deformation generated in the reflector assembly process on the surface shape precision of the reflector surface, improve the temperature adaptability and reduce the influence of the positioning precision of the traditional supporting structure on the imaging quality.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention discloses a double-shaft flexible supporting structure of a large-caliber strip-shaped reflector, which comprises:
the double-shaft flexible supporting unit is sleeved on the upper part of the double-shaft flexible supporting unit and fixedly connected with the double-shaft flexible supporting unit;
the biaxial flexible supporting unit is positioned at the invar taper sleeve end and is provided with a virtual section vertical to the axis of the biaxial flexible supporting unit;
the double-shaft flexible supporting unit is located in the virtual section, and is provided with a plurality of double-shaft flexible spring band hinges which are uniformly distributed in the circumferential direction, and a horizontal flexible wire slot extending along the virtual section is used for communicating two adjacent double-shaft flexible spring band hinges.
Furthermore, each double-shaft flexible reed belt hinge comprises two flexible reed belt hinges, the two flexible reed belt hinges are crossed in parallel, and the intersection point is superposed with the virtual section;
and a gap is reserved between the opposite surfaces of the two flexible reed strip hinges in the same double-shaft flexible reed strip hinge.
Furthermore, the whole double-shaft flexible supporting unit is of a cylindrical structure, and the invar taper sleeves sleeved on the upper part of the double-shaft flexible supporting unit are of a cylindrical structure with the lower end opened;
four biaxial flexible spring band hinges are uniformly distributed in the circumferential direction of the biaxial flexible supporting unit;
the four double-shaft flexible spring band hinges sequentially form two flexible band rings by taking the axis of the double-shaft flexible supporting unit as the center, and the inclination angles of the flexible spring band hinges on the same flexible band ring are the same.
Furthermore, circular curved grooves are formed at one ends, close to the double-shaft flexible spring strip hinge, of the horizontal flexible wire grooves.
Further, the horizontal flexible wire groove is perpendicular to the axis of the biaxial flexible supporting unit.
Furthermore, the double-shaft flexible support structure is integrated in a reflector assembly of a large-caliber long-strip-shaped reflector, the reflector assembly comprises a reflector body and a substrate formed on the back of the reflector body, and the double-shaft flexible support structure is assembled between the reflector body and the substrate.
Furthermore, the back surface of the reflector body is provided with three supporting blind holes, and each supporting blind hole is internally embedded with one double-shaft flexible supporting structure;
the lower end of the double-shaft flexible supporting unit is provided with a flange mounting boss fixedly connected with the substrate through a fastening bolt;
the invar steel taper sleeve of the double-shaft flexible supporting structure is adhered in the supporting blind hole through epoxy resin, and the invar steel taper sleeve and the double-shaft flexible supporting unit are fastened through bolts and positioned through positioning pins.
Furthermore, the upper end of the double-shaft flexible supporting unit is formed into a connecting end connected with the invar taper sleeve, a central hole is formed in the axis of the connecting end, pin holes are symmetrically formed in two sides of the central hole, and a plurality of bolt holes are uniformly distributed in the end face of the connecting end around the central hole;
the Yan Gangzhui sleeve is provided with holes corresponding to the pin holes and the bolt holes;
the pin hole is used for penetrating the positioning pin;
and the double-shaft flexible supporting unit and the fastening bolt of the invar taper sleeve are assembled at the bolt hole.
Furthermore, the invar taper sleeve is provided with an adhesive surface I which is fixedly adhered to the support blind hole and a cylindrical surface formed at the top end of the invar taper sleeve;
the bonding surface I is a conical surface with the inclination of 1;
the material model of the invar taper sleeve is 4J36, and the coefficient of thermal expansion of the invar taper sleeve is consistent with that of the reflector body.
Furthermore, the material of the biaxial flexible supporting unit is TC4, and the surface roughness of the cutting part of the horizontal flexible wire groove of the biaxial flexible supporting unit is better than 0.8.
In the technical scheme, the double-shaft flexible supporting structure of the large-caliber strip-shaped reflector provided by the invention has the beneficial effects that:
the invention discloses a double-shaft flexible supporting structure of a large-caliber strip-shaped reflector, which is characterized in that a three-point wheel double-shaft flexible supporting unit is taken as a main stress relieving component, and a bolt and a positioning pin are taken as main fastening and positioning components, so that the double-shaft flexible supporting unit, an invar steel taper sleeve, a reflector body and a substrate can be accurately positioned during installation;
in addition, the double-shaft flexible supporting unit is provided with double-shaft flexible spring band hinges which are uniformly distributed along the circumference, two inclined flexible spring band hinges of the double-shaft flexible spring band hinges form an angle with each other, meanwhile, a horizontal flexible wire groove is formed between every two adjacent double-shaft flexible spring band hinges, and the horizontal flexible wire groove has flexibility of rotating around the center of the spring band and keeps larger off-axis rigidity. When stress is generated due to the fact that load is applied from the outside, the horizontal flexible wire groove deforms, strain energy is absorbed, the stress is prevented from being transmitted to the reflector body, the surface shape accuracy of the reflector is guaranteed, stress concentration of the reflector under the action of gravity is reduced, and the surface shape accuracy of the reflector does not exceed the tolerance value of optical design.
Finally, the three biaxial flexible supporting units in the reflector assembly form complete kinematic constraint equivalent to three spherical hinges on the reflector without introducing over-constraint, so that the precise installation and positioning of the reflector are realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic diagram of a composite flexible support for a large aperture mirror according to the prior art;
FIG. 2 is a front full sectional view of a double-shaft flexible supporting structure of a large-caliber strip-shaped reflector disclosed by the invention;
FIG. 3 is an isometric view of a biaxial flexible supporting structure biaxial supporting unit of a large-caliber strip-shaped reflector disclosed by the invention;
FIG. 4 is a front view of a biaxial flexible supporting structure biaxial supporting unit of a large-caliber strip-shaped reflector disclosed by the invention;
FIG. 5 is a cross-sectional view of a biaxial flexible supporting structure biaxial supporting unit of a large-caliber strip-shaped reflector disclosed by the invention;
FIG. 6 is a cross-sectional view of the assembled state of the biaxial flexible supporting structure and the reflector body of the large-caliber strip-shaped reflector disclosed by the invention;
FIG. 7 is an exploded view of an assembled state of a biaxial flexible supporting structure of a large-caliber strip-shaped reflector and a reflector body, disclosed by the invention;
fig. 8 is a sectional view of another assembled state of the biaxial flexible supporting structure of the large-caliber strip-shaped reflector and the reflector body disclosed by the invention.
Description of reference numerals:
1. a mirror body; 2. invar taper sleeves; 3. a biaxial flexible support unit; 5. a biaxial flexible spring band hinge; 4. a substrate; 6. a horizontal flexible wire slot; 7. a circular curved groove; I. bonding surface;
a support blind hole 11;
a flange mounting boss 31; a pin hole 32; bolt holes 33;
51. a first flexible spring-band hinge; 52. a second flexible spring-band hinge; 53. a third flexible spring-band hinge; 54. a fourth flexible spring-band hinge; 55. a fifth flexible spring-band hinge; 56. a sixth flexible spring-band hinge; 57. a seventh flexible reed hinge; 58. and an eighth flexible spring band hinge.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
The first embodiment;
as shown in fig. 2;
the invention discloses a double-shaft flexible supporting structure of a large-caliber strip-shaped reflector, which comprises:
the double-shaft flexible supporting unit 3 and the invar taper sleeve 2 are sleeved on the upper part of the double-shaft flexible supporting unit 3 and fixedly connected with the double-shaft flexible supporting unit 3;
the biaxial flexible supporting unit 3 is positioned at the end of the invar taper sleeve 2 and is provided with a virtual section vertical to the axis of the biaxial flexible supporting unit 3;
the double-shaft flexible supporting unit 3 is located in the virtual section and is provided with a plurality of double-shaft flexible spring band hinges 5 in the circumferential direction, and the double-shaft flexible supporting unit 3 is provided with a horizontal flexible wire slot 6 extending along the virtual section and used for communicating the two adjacent double-shaft flexible spring band hinges 5.
Specifically, biax flexible supporting structure in this structure, it uses biax flexible supporting unit 3 as the main part, and cooperate this biax flexible supporting unit 3 to be provided with one set of invar taper sleeve 2 of establishing in biax flexible supporting unit 3 upper end, and simultaneously, in order to can eliminate stress well when applying external force to this biax flexible supporting structure, biax flexible supporting unit 3 is located invar taper sleeve 2 end and is formed with the virtual cross-section of perpendicular to biax flexible supporting unit 3 axis, biax flexible supporting unit 3 is located and has processed a plurality of biax flexible spring area hinges 5 uniformly in the virtual cross-section internal week, and communicate two adjacent biax flexible spring area hinges 5's horizontal flexible wire casing 6, when external when powerful, power transmission is to this biax flexible spring area hinge 5 and horizontal flexible wire casing 6 department, can eliminate stress through the deformation of horizontal flexible wire casing 6, avoid stress transmission to with this biax flexible supporting structure complex device.
As shown in fig. 2-5;
preferably, each double-shaft flexible spring band hinge 5 comprises two flexible spring band hinges, the two flexible spring band hinges are crossed in parallel, and the intersection point is superposed with the virtual section;
there is a gap between the facing surfaces of two flexible reed hinges in the same two-axis flexible reed hinge 5.
Specifically, each biaxial flexible spring band hinge 5 comprises two flexible spring band hinges, namely the two flexible spring band hinges form one biaxial flexible spring band hinge 5, the two flexible spring band hinges are arranged in parallel in a crossed manner, the crossed point is formed on a virtual section, the opposite surfaces of the two flexible spring band hinges are not in contact and form a gap, and the two flexible spring band hinges are prevented from interfering with each other when being deformed by external force through the gap;
as shown in fig. 2-5;
preferably, the whole double-shaft flexible supporting unit 3 is of a cylindrical structure, and the invar taper sleeve 2 sleeved on the upper part of the double-shaft flexible supporting unit 3 is of a cylindrical structure with the lower end opened;
four double-shaft flexible spring band hinges 5 are uniformly distributed on the periphery of the double-shaft flexible supporting unit 3;
wherein, four biax flexible spring area hinges use 3 axes of biax flexible support unit as the center and form two flexible band circles in proper order, and flexible spring area hinge inclination on the same flexible band circle is the same.
Specifically, the structure is further detailed by taking the biaxial flexible support unit 3, most preferably, a cylindrical structure as an example: firstly, a double-shaft flexible supporting unit 3 is of a cylindrical structure, an invar taper sleeve 2 sleeved at the upper end of the double-shaft flexible supporting unit is of a cylindrical structure matched with the cylindrical structure, meanwhile, the side wall of the top end of the double-shaft flexible supporting unit 3 in the embodiment is provided with four double-shaft flexible spring band hinges 5, the four double-shaft flexible spring band hinges 5 are formed on the same virtual section and are circumferentially and uniformly distributed, and a horizontal flexible wire slot 6 is communicated between every two adjacent double-shaft flexible spring band hinges 5;
four biaxial flexible reed hinges 5, each biaxial flexible reed hinge 5 having two flexible reed hinges, namely a first flexible reed hinge 51 and a second flexible reed hinge 52, a third flexible reed hinge 53 and a fourth flexible reed hinge 54, a fifth flexible reed hinge 55 and a sixth flexible reed hinge 56, a seventh flexible reed hinge 507 and an eighth flexible reed hinge 508, wherein the four biaxial flexible reed hinges 5 are arranged such that the two flexible reed hinges of each biaxial flexible reed hinge 5 intersect in parallel, and preferably a gap is formed between the two flexible reed hinges, as shown in fig. 5, wherein the eight flexible reed hinges sequentially form two flexible reed rings on the biaxial flexible support unit 3, and the flexible reed hinges on the same flexible reed ring have the same inclination angle, namely, the first flexible reed hinge 51, the third flexible reed hinge 53, the fifth flexible reed hinge 55, the seventh flexible reed hinge 507 is a flexible reed ring, and the second flexible reed hinge 52, the fourth flexible reed hinge 54, the sixth flexible reed hinge 56, the eighth flexible reed hinge 508 is a flexible reed hinge 508;
preferably, the horizontal flexible wire groove 6 is formed with a circular curved groove 7 at one end adjacent to the hinge of the biaxial flexible spring strip. Preferably, the horizontal flexible wire chase 6 is perpendicular to the biaxial flexible support unit 3 axis.
Each of the horizontal flex line grooves 6 described in the above embodiments has a circular curved groove 7 near the biaxial flex spring hinge 5. The double-shaft flexible supporting unit 3 designed in the mode of the embodiment is matched with the invar taper sleeve 2 on the double-shaft flexible supporting unit and can greatly eliminate acting force acting on the double-shaft flexible supporting unit after an external mechanism is installed, and stress is prevented from being transmitted to the external mechanism through deformation of the horizontal flexible wire groove 6, so that the service life of the external structure is effectively prolonged.
Example two;
as shown in fig. 6-8;
the invention discloses a large-caliber strip-shaped reflector component, which comprises a reflector body 1 and a substrate 4 formed on the back surface of the reflector body 1, wherein a plurality of biaxial flexible supporting structures (shown in figures 2 to 5) are assembled between the reflector body 1 and the substrate 4;
through the introduction of the pair of biaxial flexible supporting structures in the embodiment, the second embodiment takes the large-caliber strip-shaped reflector to which the biaxial flexible supporting structure is applied as an example for further description. Preferably, in the second embodiment, the back surface of the reflector body 1 is provided with three supporting blind holes 11, and each supporting blind hole 11 is embedded with one of the biaxial flexible supporting structures;
the lower end of the double-shaft flexible supporting unit 3 is provided with a flange mounting boss 31 fixedly connected with the substrate 4 through a fastening bolt, the invar steel taper sleeve 2 of the double-shaft flexible supporting structure is adhered in the supporting blind hole 11 through epoxy resin, and the invar steel taper sleeve 2 and the double-shaft flexible supporting unit 3 are fastened through bolts and are positioned through positioning pins.
Firstly, the biaxial flexible supporting structure disclosed in the first embodiment is integrated into a large-caliber strip-shaped reflector, a supporting blind hole 11 for embedding the flexible supporting structure is required to be formed in the back surface of the reflector body 1, while the second embodiment has three supporting blind holes 11 in the back surface of the reflector body 1 in order to form a three-point supporting structure; secondly, having combined the structure of the speculum mirror body 1, foretell biax flexible support structure still needs to have the connection position that links firmly with the base plate 4 of the speculum mirror body 1, therefore, this embodiment has designed flange mounting boss 31 again in biax flexible support structure and base plate 4 junction, and the diameter of this flange mounting boss 31 needs to be greater than the diameter of biax flexible support unit 3, and the flange mounting boss 31 of this embodiment passes through the bolt-up with base plate 4, and the dismouting is comparatively convenient, and stability is good.
In addition, in this embodiment, the invar taper sleeve 2 has an adhesive surface I adhered and fixed to the support blind holes 11, and a cylindrical surface formed on the top end of the invar taper sleeve 2; the bonding surface I is a conical surface with the inclination of 1;
the invar taper sleeve 2 is made of 4J36 materials, and the coefficient of thermal expansion of the invar taper sleeve 2 is consistent with that of the reflector 1. The bonding surface I and the supporting blind holes 11 on the back surface of the reflector body 1 are bonded by epoxy resin, glue is uniformly applied during bonding, the thickness of the glue is ensured to be consistent, the generation of bonding stress is avoided as much as possible, and the invar taper sleeve 2 needs to be fully aged and stabilized during manufacturing.
Preferably, the upper end of the double-shaft flexible supporting unit 3 is formed into a connecting end connected with the invar taper sleeve 2, a central hole is formed in the axis of the connecting end, pin holes 32 are symmetrically formed in two sides of the central hole, and a plurality of bolt holes 33 are uniformly distributed on the end face of the connecting end around the central hole;
holes corresponding to the pin holes 32 and the bolt holes 33 are formed in the invar steel taper sleeve 2;
the pin hole 32 is used for penetrating a positioning pin;
the fastening bolts of the biaxial flexible supporting unit 3 and the invar taper sleeve 2 are assembled at the bolt holes 33.
In the second embodiment, the double-shaft flexible support structure is integrated in the large-caliber strip-shaped reflector assembly, so that accurate positioning and good stability after fastening are required to be ensured during installation; in order to meet the requirement, the pin hole 32 and the bolt hole 33 are designed in the embodiment, wherein the pin hole 32 is used for penetrating a positioning pin, the positioning pin can ensure accurate positioning of the invar taper sleeve 2, the biaxial flexible supporting unit 3 and an external mechanism used in cooperation with the biaxial flexible supporting structure, and the stress transmitted in the later period can be accurately acted on the horizontal flexible wire slot 6, so that the stress is eliminated to the maximum extent. The bolt holes 33 are used for fastening bolts, and are not described in detail herein.
Preferably, the material of the biaxial flexible supporting unit 3 is TC4, and the surface roughness of the cutting part of the horizontal flexible wire groove 6 of the biaxial flexible supporting unit 3 is better than 0.8.
The horizontal flexible wire groove 6 of this embodiment adopts the processing mode of "wire cutting, slowly walk" when making, and the cutting position surface has the roughness requirement mentioned above, in addition, the whole abundant vacuum ageing of biax flexible support unit 3 is and is stabilized treatment.
With reference to the second embodiment, when the biaxial flexible support structure in the first embodiment is assembled in a large-caliber long-strip-shaped reflector assembly, through design and practice, there is also a partially preferred technical solution:
the thickness of the double-shaft flexible spring belt hinge is generally 2mm or more and t or less than 4mm, the radius of the circular curved groove 7 is 10mm or more and r or less than 15mm, and the width of the horizontal flexible wire groove 6 is 2mm or more and b or less and 5mm or less.
In addition, all the bolts/screws for connection adopt GB/T70.1-2000 standard, the fastening bolts/screws of the invar taper sleeve 2 and the biaxial flexible supporting unit 3 are hexagon socket head cap screws M5X16, the positioning pins on the bolt/screws are phi 3X16 positioning pins, and the material of the positioning pins is 30CrMnSi.
During assembly, all component parts need to be thoroughly cleaned, no dust and foreign matter is guaranteed, assembly is carried out in a dust-free workshop during assembly, and the assembly environment is guaranteed to be clean and clean. Firstly, adhering a reflector body 1 and an invar taper sleeve 2, carrying out repairing and marking on the invar taper sleeve 2 and a supporting blind hole 11 of the corresponding reflector body 1, uniformly coating an epoxy resin adhesive on an adhering surface I of the invar taper sleeve 2, fully contacting with the supporting blind hole 11 of the reflector body 1, adhering and curing; assembling the double-shaft flexible supporting units 3 and the invar steel taper sleeves 2, gluing and fixing by using screws during assembling, positioning by using pins, and then integrally repairing and grinding the bottoms of the flange mounting bosses 31 of the assembled three double-shaft flexible supporting structures to ensure coplanarity allowance values; finally, the substrate 4 and the biaxial flexible support structure are assembled: the base plate 4 is connected to the bottoms of the flange mounting bosses 31 of the repaired and ground three double-shaft flexible supporting structures through screw glue application, and a next testing, adjusting and mounting test is carried out after the base plate is assembled.
Has the advantages that:
the invention discloses a double-shaft flexible supporting structure and a large-caliber strip-shaped reflector component for eliminating stress by utilizing the flexible supporting structure, wherein the large-caliber strip-shaped reflector takes a three-point double-shaft flexible supporting unit 3 as a main stress eliminating component, and is assembled with bolts and positioning pins as main fastening and positioning components, so that accurate positioning can be formed among the double-shaft flexible supporting unit 3, an invar steel taper sleeve 2, a reflector body 1 and a substrate 4 during installation;
in addition, the double-shaft flexible supporting unit 3 is formed by uniformly distributing double-shaft flexible reed hinges 5 along the circumference, two inclined flexible reed hinges of the double-shaft flexible reed hinges 5 form an angle with each other, meanwhile, a horizontal flexible wire groove 6 is formed between every two adjacent double-shaft flexible reed hinges 5, and the horizontal flexible wire groove 6 keeps larger off-axis rigidity due to the flexibility of the rotation around the spring strip center. When stress is generated due to the application of load from the outside, the horizontal flexible wire slot 6 deforms to absorb strain energy and prevent the stress from being transmitted to the reflector body 1, so that the surface shape precision of the reflector surface is ensured.
Finally, the three biaxial flexible supporting units 3 in the reflector assembly form complete kinematic constraint equivalent to three spherical hinges on the reflector 1 without introducing over-constraint, so that the precise installation and positioning of the reflector 1 are realized.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. A double-shaft flexible supporting structure of a large-caliber long-strip-shaped reflector comprises:
the double-shaft flexible supporting unit (3) and the invar taper sleeve (2) sleeved on the upper part of the double-shaft flexible supporting unit (3) and fixedly connected with the double-shaft flexible supporting unit (3) are characterized in that the invar taper sleeve is provided with a groove;
the biaxial flexible supporting unit (3) is positioned at the end of the invar steel taper sleeve (2) and is provided with a virtual section vertical to the axis of the biaxial flexible supporting unit (3);
the double-shaft flexible supporting unit (3) is located at the inner circumference of the virtual section, a plurality of double-shaft flexible spring band hinges (5) are evenly distributed on the inner circumference of the virtual section, and a horizontal flexible wire slot (6) extending along the virtual section is formed in the double-shaft flexible supporting unit (3) and used for communicating two adjacent double-shaft flexible spring band hinges (5).
2. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 1, wherein;
each double-shaft flexible spring belt hinge (5) comprises two flexible spring belt hinges, the two flexible spring belt hinges are crossed in parallel, and the intersection point is superposed with the virtual section;
and a gap is reserved between the opposite surfaces of two flexible reed hinges in the same double-shaft flexible reed hinge (5).
3. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 2, wherein;
the double-shaft flexible supporting unit (3) is integrally of a cylindrical structure, and the invar taper sleeve (2) sleeved on the upper part of the double-shaft flexible supporting unit (3) is of a cylindrical structure with the lower end opened;
four double-shaft flexible spring band hinges (5) are uniformly distributed in the circumferential direction of the double-shaft flexible supporting unit (3);
the four double-shaft flexible spring band hinges (5) sequentially form two flexible band rings by taking the axis of the double-shaft flexible supporting unit (3) as the center, and the inclination angles of the flexible spring band hinges on the same flexible band ring are the same.
4. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 1, wherein;
and circular curved grooves (7) are formed at one ends of the horizontal flexible wire grooves (6) close to the double-shaft flexible spring band hinges (5).
5. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 4, wherein the support structure comprises a support frame and a support frame;
the horizontal flexible wire groove (6) is perpendicular to the axis of the double-shaft flexible supporting unit (3).
6. The biaxial flexible support structure of a large-caliber elongated reflector according to any one of claims 1 to 5, wherein the support structure comprises a support frame and a support frame;
the double-shaft flexible supporting structure is integrated in a reflector component of a large-caliber long-strip-shaped reflector, the reflector component comprises a reflector body (1) and a substrate (4) formed on the back of the reflector body (1), and the double-shaft flexible supporting structure is assembled between the reflector body (1) and the substrate (4).
7. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 6, wherein the support structure comprises a support frame and a support frame;
the back of the reflector body (1) is provided with three supporting blind holes (11), and each supporting blind hole (11) is internally embedded with one biaxial flexible supporting structure;
the lower end of the double-shaft flexible supporting unit (3) is provided with a flange mounting boss (31) fixedly connected with the substrate (4) through a fastening bolt;
the invar taper sleeve (2) of the double-shaft flexible supporting structure is adhered in the supporting blind hole (11) through epoxy resin, and the invar taper sleeve (2) and the double-shaft flexible supporting unit (3) are fastened through bolts and positioned through positioning pins.
8. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 7, wherein;
the upper end of the double-shaft flexible supporting unit (3) is formed into a connecting end connected with the invar conical sleeve (2), a central hole is formed in the axis of the connecting end, pin holes (32) are symmetrically formed in two sides of the central hole, and a plurality of bolt holes (33) are uniformly distributed in the end face of the connecting end around the central hole;
holes corresponding to the pin holes (32) and the bolt holes (33) are formed in the invar steel taper sleeve (2);
the pin hole (32) is used for penetrating the positioning pin;
the double-shaft flexible supporting unit (3) and the invar taper sleeve (2) are assembled at the bolt holes (33) through fastening bolts.
9. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 7, wherein;
the invar taper sleeve (2) is provided with an adhesive surface I which is fixedly adhered to the support blind hole (11) and a cylindrical surface formed at the top end of the invar taper sleeve (2);
the bonding surface I is a conical surface with the inclination of 1;
the material type of the invar taper sleeve (2) is 4J36, and the coefficient of thermal expansion of the invar taper sleeve (2) is consistent with that of the reflector body (1).
10. The biaxial flexible support structure for the large-caliber elongated reflector according to claim 6, wherein the support structure comprises a support frame and a support frame;
the material of the double-shaft flexible supporting unit (3) is TC4, and the surface roughness of the cutting part of the horizontal flexible wire groove (6) of the double-shaft flexible supporting unit (3) is better than 0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211531405.9A CN115903170B (en) | 2022-12-01 | 2022-12-01 | Double-shaft flexible supporting structure of large-caliber strip-shaped reflecting mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211531405.9A CN115903170B (en) | 2022-12-01 | 2022-12-01 | Double-shaft flexible supporting structure of large-caliber strip-shaped reflecting mirror |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115903170A true CN115903170A (en) | 2023-04-04 |
| CN115903170B CN115903170B (en) | 2024-01-26 |
Family
ID=86479249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211531405.9A Active CN115903170B (en) | 2022-12-01 | 2022-12-01 | Double-shaft flexible supporting structure of large-caliber strip-shaped reflecting mirror |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115903170B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116736476A (en) * | 2023-08-10 | 2023-09-12 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber long strip-shaped reflecting mirror stress-free assembly structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101372946B1 (en) * | 2012-09-12 | 2014-03-25 | 한국표준과학연구원 | Flexure mount and method for manufacturing the flexure mount |
| CN107121753A (en) * | 2017-05-27 | 2017-09-01 | 中国科学院上海技术物理研究所 | A kind of integrated bidimensional pivoting flexible hinge |
| CN108115301A (en) * | 2017-12-14 | 2018-06-05 | 王洪福 | A kind of hook switch hinge assemblies frock and its application method |
| CN108662010A (en) * | 2018-05-29 | 2018-10-16 | 湖南大学 | A kind of zero axle drift reed-type flexible hinge |
| CN109239887A (en) * | 2018-11-28 | 2019-01-18 | 中国科学院长春光学精密机械与物理研究所 | Space optical remote sensor large-scale circular reflecting mirror flexible support structure |
| CN111503131A (en) * | 2020-06-04 | 2020-08-07 | 华东交通大学 | Axial tension and compression resistant large-corner flexible hinge |
| CN111929804A (en) * | 2020-08-31 | 2020-11-13 | 长光卫星技术有限公司 | Support structure of large length-width ratio space reflector |
| CN114326096A (en) * | 2022-01-05 | 2022-04-12 | 成都大学 | Image motion compensation quick reflector |
| CN115095599A (en) * | 2022-08-01 | 2022-09-23 | 重庆巅慧科技有限公司 | Double-shaft cross spring hinge with large deflection angle and strong anti-vibration capability |
-
2022
- 2022-12-01 CN CN202211531405.9A patent/CN115903170B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101372946B1 (en) * | 2012-09-12 | 2014-03-25 | 한국표준과학연구원 | Flexure mount and method for manufacturing the flexure mount |
| CN107121753A (en) * | 2017-05-27 | 2017-09-01 | 中国科学院上海技术物理研究所 | A kind of integrated bidimensional pivoting flexible hinge |
| CN108115301A (en) * | 2017-12-14 | 2018-06-05 | 王洪福 | A kind of hook switch hinge assemblies frock and its application method |
| CN108662010A (en) * | 2018-05-29 | 2018-10-16 | 湖南大学 | A kind of zero axle drift reed-type flexible hinge |
| CN109239887A (en) * | 2018-11-28 | 2019-01-18 | 中国科学院长春光学精密机械与物理研究所 | Space optical remote sensor large-scale circular reflecting mirror flexible support structure |
| CN111503131A (en) * | 2020-06-04 | 2020-08-07 | 华东交通大学 | Axial tension and compression resistant large-corner flexible hinge |
| CN111929804A (en) * | 2020-08-31 | 2020-11-13 | 长光卫星技术有限公司 | Support structure of large length-width ratio space reflector |
| CN114326096A (en) * | 2022-01-05 | 2022-04-12 | 成都大学 | Image motion compensation quick reflector |
| CN115095599A (en) * | 2022-08-01 | 2022-09-23 | 重庆巅慧科技有限公司 | Double-shaft cross spring hinge with large deflection angle and strong anti-vibration capability |
Non-Patent Citations (3)
| Title |
|---|
| 刘浪等: "交叉簧片柔性铰链的翘曲分析与消除", 北京理工大学学报, vol. 34, no. 9 * |
| 吴昊等: "交叉簧片柔性铰链设计", 中国机械工程, vol. 33, no. 10, pages 1204 - 1207 * |
| 金开放: "大行程柔顺恒力机构的优化设计", 硕士电子期刊 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116736476A (en) * | 2023-08-10 | 2023-09-12 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber long strip-shaped reflecting mirror stress-free assembly structure |
| CN116736476B (en) * | 2023-08-10 | 2023-10-27 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber long strip-shaped reflecting mirror stress-free assembly structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115903170B (en) | 2024-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109239887B (en) | Flexible supporting structure for large circular reflector of space optical remote sensor | |
| CN110244431B (en) | Flexible supporting structure for reflector of space camera | |
| CN110231691B (en) | Cross hinge type flexible supporting structure | |
| CN103969788B (en) | A kind of side flexible support structure of space optical remote sensor circular reflector | |
| US3009391A (en) | Combined mirror supporting or mounting, adjusting, and locking means | |
| CN115903170A (en) | Double-shaft flexible supporting structure of large-caliber strip-shaped reflector | |
| CN105242373B (en) | Space camera mirror center support meanss | |
| CN107037567B (en) | Reflector supporting structure with three-point ball head combined with radial cementation | |
| CN107703603B (en) | Flexible supporting structure applied to back-to-back inspection type rectangular reflector | |
| CN107462966B (en) | Flexible supporting structure for miniature remote sensing load reflecting mirror | |
| CA2953771C (en) | Precision optical mount for optical devices | |
| CN111352209A (en) | Support structure of large-caliber reflector component of space remote sensor | |
| CN114200634B (en) | Directional reflector assembly of space camera | |
| CN114942507A (en) | Flexible supporting structure of optical reflector and adjusting method | |
| CN109521546B (en) | Microstress supporting structure of large-caliber collimator reflector | |
| CN109239858A (en) | A kind of optical fiber collimator docking style single optical rotary joint and installation method | |
| CN115268010B (en) | Reflective laser beam expanding device suitable for high and low temperature environment | |
| CN209311765U (en) | A kind of microstress support construction of heavy caliber parallel light tube reflecting mirror | |
| JP3926560B2 (en) | Lightweight mirror | |
| CN110412714B (en) | Large-diameter reflector supporting mechanism | |
| CN115576073A (en) | Light and small reflector component for airborne laser beam expanding system | |
| CN112130277B (en) | Flexible supporting structure suitable for space camera reflector | |
| CN111522122B (en) | Rigid heat dissipation device for medium and small-caliber space reflector | |
| CN106324793B (en) | A kind of small-bore reflecting mirror support structure | |
| CN113960744B (en) | Clamp for clamping wedge-shaped mirror, wedge-shaped mirror and optical device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |