CN115951470A - Vibration-resistant and heat-dissipating supporting mechanism of rectangular reflector with large length-width ratio - Google Patents
Vibration-resistant and heat-dissipating supporting mechanism of rectangular reflector with large length-width ratio Download PDFInfo
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- CN115951470A CN115951470A CN202211532993.8A CN202211532993A CN115951470A CN 115951470 A CN115951470 A CN 115951470A CN 202211532993 A CN202211532993 A CN 202211532993A CN 115951470 A CN115951470 A CN 115951470A
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Abstract
The invention discloses a vibration-proof and heat-dissipation support mechanism for a rectangular reflector with a large length-width ratio of an astronomical spectral imager, which relates to the field of design and manufacture of astronomical optical instruments and is suitable for carrying out vibration-proof and heat-dissipation support on the reflector under the condition that a reflector component mounting bracket and a reflector component are not matched in material, and comprises the following components: the assembly body of the reflector chamber, the vibration isolation and heat elimination rigid support structure and the vibration isolation and heat elimination flexible structure. The mirror surface shape precision can be maintained by using the mirror mounting bracket and the mirror component made of materials with different thermal expansion coefficients under the conditions of external random vibration interference and temperature change. The method is characterized in that: the reflector supporting structure adopts optical cement to prevent the reflector chamber from directly contacting the reflector, so that the reflector chamber and the reflector have thermal expansion margin; the mirror chamber supporting structure comprises a bottom rigid supporting part and an upper flexible structure, and the positioning, vibration resistance and heat dissipation supporting are cooperatively realized. The invention has simple supporting structure, good supporting stability and no additional mirror surface additional force, and can well meet the requirements in engineering.
Description
Technical Field
The invention belongs to the technical field of mechanical design and manufacture, and particularly relates to an anti-vibration and heat-dissipation supporting mechanism of a rectangular reflector with a large length-width ratio in an astronomical optical instrument; the reflecting mirror is an important part of astronomical instruments, the position precision of the reflecting mirror directly influences the final imaging effect, and therefore a reflecting mirror supporting mechanism for resisting vibration and eliminating heat is necessary.
Background
The reflector is an extremely important component in an astronomical optical instrument, and greatly influences the imaging performance of the optical instrument. The rectangular reflector is often applied to a collimating mirror of a spectrometer, a secondary mirror of an optical telescope and other optical systems with special requirements, such as an off-axis three-mirror system and the like. In order to meet the optical requirements of the optical reflector, the choice of materials adopted by the reflector is limited, so that the phenomenon that the thermal expansion coefficients of the reflector material, the supporting components and the supporting structure are not matched frequently occurs, thermal stress is generated among the components during temperature change and is finally transmitted to the reflector surface, and the reflector surface type is damaged. Meanwhile, external vibration interference cannot be avoided in the working process of the reflector, and the surface type precision, position and posture stability of the reflector must be ensured to ensure the imaging capability of the reflector, so that the supporting structure is required to have sufficient static rigidity and good vibration isolation capability. Especially for the rectangular reflector with large length-width ratio, the reflector is more sensitive to temperature and vibration, the design of a supporting structure is more challenging, and meanwhile, the supporting structure is not too complex as required by detection, installation positioning, installation and adjustment and the like of the reflector, so that the supporting structure which has a simple structure, is easy to install and adjust, can eliminate thermal mismatching of the reflector component and the reflector bracket during temperature change, can ensure the efficiency of the reflector under the external random vibration interference working condition and realizes high-quality imaging of a reflective optical machine system is needed.
Disclosure of Invention
The invention provides a vibration-resistant and heat-dissipating support mechanism of a rectangular reflector with a large length-width ratio, which can eliminate the thermal mismatching of an antireflection mirror, a mirror chamber frame and a reflector back plate caused by the difference of the thermal expansion coefficients of materials, reduce the influence of external random vibration interference and temperature change on the mirror surface type and realize the stable support of the rectangular reflector with the large length-width ratio. The invention has simple supporting structure, good supporting stability and no additional mirror surface additional force, and can well meet the requirements in engineering.
The invention achieves the above purpose through the following technical scheme: the utility model provides a high profile type precision support of speculum that anti vibration heat dissipation supporting mechanism of big length-width ratio rectangle speculum, installs on optical instrument installing support, realizes the speculum. The mechanism comprises a mirror chamber frame, a reflector, a back plate, a mirror chamber frame rigid supporting structure and a mirror chamber frame flexible supporting structure.
The main body of the mirror chamber frame is in a long rectangular frame structure and has 4 surfaces, namely an upper bottom surface, a lower bottom surface, a left side surface and a right side surface; the front surface of the mirror chamber frame is provided with a flange end surface which is matched with the reflector in a positioning way; the back of the mirror chamber frame is symmetrically provided with sinking surfaces at certain intervals on the frame edge.
The section of the reflector is convex, the back surface of the reflector is a spherical surface, and the other surfaces of the reflector are planes; the upper and lower edges of the spherical surface are processed into flat end surfaces. The reflector is arranged in a reflector chamber frame, and the front end surface of the reflector is directly matched with the end surface of the flange in a positioning way; one end of the pressing block is arranged in the sinking surface and fixed by a screw, and the other end of the pressing block presses the flat end surface of the upper (or lower) edge of the spherical surface of the reflector and is fixedly connected with the flat end surface by glue dispensing.
The middle of the back plate is provided with a long rectangular through hole, and the size of the through hole can accommodate the spherical surface of the reflector; two long steps are respectively arranged at the upper end and the lower end; and a threaded hole which is installed in a matched mode is arranged.
Mirror room frame rigid support structure includes: t type bearing structure and center location bearing structure.
The central positioning support structure is arranged in the middle of the lower bottom surface of the mirror chamber frame, T-shaped support structures are symmetrically distributed on two sides of the central positioning support structure at certain intervals, and each two sides of the central positioning support structure are provided with four T-shaped support structures.
The centrally located support structure comprises: a center positioning transition block and a center positioning support.
T type bearing structure includes: linear guide, slider, T type support piece.
Mirror room frame flexible support structure includes: the flexible structure comprises a fixed flexible structure and a sliding flexible structure.
The sliding flexible structure includes: linear guide, slider, flexible rod mounting panel, flexible rod support.
The fixed flexible structure includes: flexible pole, middle flexible pole base, middle flexible pole support.
The reflector supporting structure reduces thermal stress generated between the reflector chamber frame and the reflector body under the temperature change through deformation of the distribution glue layer of the reflector chamber frame, and vibration interference can be resisted; the bottom rigid support structure of the mirror chamber frame support structure ensures the position stability of the mirror body, and the linear guide rail releases the thermal stress in the direction of the guide rail caused by the temperature change of the mirror chamber frame and the back plate made of different materials; the flexible supporting structure above the mirror chamber frame supporting structure absorbs random vibration energy in the gravity direction through the flexible link, so that the influence of the random vibration on the mirror chamber is reduced, and meanwhile, the thermal stress caused by thermal deformation difference caused by thermal mismatching of the back plate and the mirror chamber frame in the gravity direction is reduced. The flexible link is a variable cross-section beam structure, the rigidity is controlled by controlling the size of the cross section, the required support rigidity can be ensured, certain flexibility is possessed, and vibration and thermal stress are absorbed through flexible joint deformation; and finally, the sizes of the guide rail and each support in the direction vertical to the mirror surface are restricted, so that the supports generate equivalent thermal deformation in the direction vertical to the mirror surface under the same temperature change, and the thermal stress moment generated by the nonuniform thermal deformation is prevented from being transmitted to the mirror surface to damage the surface shape.
The rectangular reflector with the large length-width ratio is made of low-thermal-expansion glass ceramics, and the influence of temperature change on the rectangular reflector is small; the reflector is in direct contact with the end face of the flange, the mirror chamber frame is made of invar steel, the coefficient of thermal expansion is small, the mirror chamber frame is insensitive to temperature change, and the flange needs to reach a high-precision grinding grade to ensure matching precision. The other four sides of the reflector are not in direct contact with the mirror chamber frame, and a layer of 0.5 mm-thick optical cement spots is distributed between the reflector and the four sides of the mirror chamber frame. Twelve press blocks cross between the flat end surfaces at two sides of the spherical surface of the reflector and the sinking surface of the mirror chamber frame, the press blocks are fastened on the sinking surface through bolts, and 0.5mm optical cement spots are arranged between the press blocks and the reflector and are not in direct contact with the mirror chamber. The optical cement spots are optical cement with small elastic modulus and large thermal expansion coefficient, such as 704 optical cement, so that the static position and attitude accuracy of the reflector can be ensured to be stable under the condition of no temperature change, and a certain thermal expansion margin is provided between the reflector and the reflector chamber through the deformation of the optical cement spots under the condition of temperature change, so that direct thermal stress is not generated between the reflector and the reflector chamber.
The central positioning support mainly has the functions of positioning and supporting, adopts invar steel materials the same as the mirror room frame, has no thermal stress with the mirror room frame when the temperature changes, the upper end of the central positioning support is arranged on the mirror room frame through a bolt, the lower end of the central positioning support is fixed on the central positioning transition block, and the positioning hole in the middle has the functions of positioning and supporting. The four groups of linear guide rails are usually made of bearing steel materials, and the left group and the right group are symmetrically arranged on the back plate. And the T-shaped support piece is arranged on each group of sliding blocks, the T-shaped support piece is made of invar materials the same as the frame of the mirror chamber, no thermal stress exists between the T-shaped support piece and the frame of the mirror chamber during temperature change, the T-shaped support piece is arranged on the frame of the mirror chamber through bolts and plays a role of rigid support, and the linear guide rail allows the mirror chamber to freely expand in the sliding direction during temperature change and allows the transverse vibration stress to be freely released during external random vibration interference. The central positioning transition block is arranged on the back plate, plays a role in transition and size adjustment between the back plate and the central positioning support, is not in contact with the mirror chamber, adopts the same material as the linear guide rail, has the same thickness in the direction vertical to the mirror surface as the linear guide rail, and generates the same amount of thermal strain with the linear guide rail under the condition of temperature change, so that the bottom rigid support part of the mirror chamber support structure does not generate thermal stress moment on the mirror chamber in the direction vertical to the mirror surface.
The flexible rod is of a variable-section beam structure, absorbs energy through flexible joint deformation at a small section to resist external vibration interference and thermal deformation, and is free of friction and high in precision compared with a traditional hinge. The six flexible rods are symmetrically distributed on the symmetrical surface of the mirror chamber frame, and the two flexible rods are arranged in the middle and the two flexible rods are arranged on the left and the right. The middle flexible rod base is symmetrically provided with threaded holes connected with the flexible rods, is directly arranged on the back plate and is fastened through bolts. The middle flexible rod support and the left and right flexible rod supports are directly arranged on the mirror chamber frame, through holes are symmetrically processed, and the flexible rods are fastened and clamped by nuts on two sides of the through holes. One end of the flexible rod at the left side and the right side is fixed on the flexible rod support through a nut, and the other end is arranged on the flexible rod mounting plate. The flexible rod mounting plate is fixed on the slide block of the linear guide rail and plays a role in transition and size adjustment. Under the interference of temperature change and external transverse vibration, the sliding flexible structure can transversely move on the guide rail along with the sliding block when the mirror chamber frame transversely expands and displaces, and can cooperatively move with the bottom rigid support part without generating transverse internal stress. The flexible rod is a structural material boundary part, all supports in direct contact with the mirror chamber frame are made of materials, such as invar steel, the same materials, such as bearing steel, are adopted for the flexible rod and all parts on the other side of the flexible rod, the sum of the thicknesses of the linear guide rail and the flexible rod mounting plate in the direction perpendicular to the mirror surface is equal to the thickness of the middle flexible rod base in the direction, the flexible part above the whole mirror chamber supporting structure generates uniform thermal expansion in the direction perpendicular to the mirror surface when the temperature changes, and thermal stress moment is not generated on the mirror chamber frame in the direction perpendicular to the mirror surface. In the gravity direction, the random vibration load and the thermal stress generated by the thermal mismatching of the back plate and the mirror chamber frame are absorbed and reduced through flexible joint deformation, and the influence on the reflector is small.
Advantageous effects
The invention can eliminate the thermal mismatching of the reflector component and the reflector bracket due to the difference of the thermal expansion coefficients of the materials, reduce the influence of external random vibration interference and temperature change on the surface shape of the reflector, realize the stable support of the rectangular reflector with large length-width ratio, has simple support structure, good support stability and no additional force of the reflector, and can well realize the requirements in engineering.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic diagram of a front structure of a mirror chamber frame of a reflector;
FIG. 2 is a schematic view of a rear structure of a mirror chamber frame of the reflector;
FIG. 3 is a schematic view of a mirror body structure;
FIG. 4 is a schematic rear view of the mirror mounted in the mirror housing frame;
FIG. 5 is a schematic perspective view of a mirror chamber frame of the reflector;
FIG. 6 is a schematic view of a rigid support structure for a mirror chamber frame;
FIG. 7 is a schematic view of a structure for connecting a rigid support structure of a mirror chamber frame and a back plate;
FIG. 8 is a schematic view of a T-shaped support body;
FIG. 9 is a schematic view of a T-shaped support mounting structure;
FIG. 10 is a schematic view of a connection structure of a flexible support structure of a mirror chamber frame and a back plate;
FIG. 11 is a schematic view of a sliding flexible structure;
FIG. 12 is a schematic view of a fixed flexible structure;
FIG. 13 is a schematic view of a back plate structure;
FIG. 14 is a schematic view of the lens chamber frame glue injection holes and the optical spots of the mirrors.
Wherein: 1. the mirror chamber comprises a mirror chamber frame, 2 flange end faces, 3 hangers, 4 sinking faces, 5 rectangular shallow grooves, 6 mounting end faces, 7 reflectors, 8 pressing blocks, 9 linear guide rails, 10 sliding blocks, 11T-shaped supporting pieces, 12 central positioning transition blocks, 13 central positioning supports, 14 back plates, 15 long-strip steps, 16 flexible rod mounting plates, 17 flexible rods, 18 flexible rod supports, 19 middle flexible rod bases, 20 middle flexible rod supports, 21 nuts, 22 glue injection holes and 23 optical glue spots.
Detailed Description
The invention relates to a vibration-proof and heat-dissipation supporting device of a rectangular reflector with large length-width ratio, which comprises: the mirror room frame 1, the reflecting mirror 7, the back plate 14, the rigid supporting structure of the mirror room frame and the flexible supporting structure of the mirror room frame. See in particular fig. 1-13.
The mirror chamber frame 1 is shown in fig. 1 and 2, and the main body has a long rectangular frame structure and has 4 surfaces, i.e., upper and lower bottom surfaces and left and right side surfaces. The front surface of the mirror chamber frame 1 is provided with a flange end surface 2 which is matched with a reflector 7 in a positioning way; the back of the mirror chamber frame 1 is symmetrically provided with sinking surfaces 4 at the edge of the frame at certain intervals, the upper sinking surface and the lower sinking surface are 6, and each sinking surface 4 is provided with a threaded hole matched with a pressing block 8. The two ends of the upper part of the back of the mirror chamber frame 1 are provided with hanging lugs 3, and the hanging lugs at the position are used for installing hanging rings during assembly due to the fact that the reflector is heavy.
The upper bottom surface of the mirror chamber frame 1 is provided with a rectangular shallow groove 5 and a mounting end surface 6; for fitting the installation of the flexible support structure of the mirror chamber frame. The mounting end face 6 and the sinking face 4 are both provided with threaded holes. The lower bottom surface of the mirror chamber frame 1 is provided with a threaded hole for fitting the installation of the rigid supporting structure of the mirror chamber frame, as shown in fig. 5.
The section of the reflector 7 is convex (which is convenient for the installation and fixation of the pressing block 8 in the mirror chamber frame 1), the back surface of the reflector 7 is a spherical surface, and the other surfaces are planes; the upper and lower edges of the spherical surface are processed into flat end surfaces (the flat end surfaces are used for dispensing and matching with the pressing block 8). The reflector 7 is arranged in the mirror chamber frame 1, and the front end surface of the reflector 7 is directly matched with the flange end surface 2 in a positioning way; as shown in fig. 4, one end of the pressing block 8 is installed in the sinking plane 4 and fixed by a screw, and the other end of the pressing block 8 presses the flat end surface of the upper (or lower) edge of the spherical surface of the reflector 7 and is fixedly connected with the flat end surface by glue dispensing.
The back plate 14 has a rectangular through hole in the middle, as shown in fig. 13, and the size of the through hole can expose the spherical surface of the reflector; two strip steps 15 are respectively arranged at the upper end and the lower end; and a threaded hole which is installed in a matched mode is arranged. As shown in fig. 7, 10 and 13. The mirror 7 is housed in the mirror housing frame 1, and the back plate 14 is mounted on the rear side of the mirror housing frame 1.
Mirror room frame rigid support structure includes: t type bearing structure and center location bearing structure. As shown in fig. 6, 7; the central positioning support structure is arranged in the middle of the lower bottom surface of the mirror room frame 1, T-shaped support structures are symmetrically distributed on two sides of the central positioning support structure at certain intervals, and the total number of the two T-shaped support structures on each side is four.
The centrally located support structure includes: a center positioning transition block 12 and a center positioning support 13.
Countersunk through holes are symmetrically distributed on the left and right sides of the upper end surface of the central positioning support 13, are matched with threaded holes on the lower bottom surface of the mirror chamber frame 1 in an installing way, and are fixedly connected through screws. The rear end face is provided with a finish machining penetrating positioning hole positioned in the center of the symmetry axis and through holes symmetrically distributed left and right; the central positioning transition block 12 is provided with a finish machining positioning matching hole coaxial with the positioning hole of the central positioning support 13 and threaded holes symmetrically distributed left and right; the center positioning support 13 is fixed on the back plate 14 together with the center positioning transition block 12 through screws.
T type bearing structure includes: the linear guide rail 9, the slide block 10 and the T-shaped support piece 11; countersunk through holes which are symmetrically distributed at the left and the right are arranged on the upper end surface of the T-shaped support piece 11 and are matched with threaded holes on the lower bottom surface of the mirror chamber frame 1 for mounting and fastening through bolts; the rear end face of the T-shaped supporting part 11 is provided with through holes which are distributed in bilateral symmetry and fastened with the sliding block 10 through bolts, the sliding block 10 is fixed on the rear end face of the T-shaped supporting part 11, the sliding block 10 is installed on the linear guide rail 9, and the T-shaped supporting part 11 and the sliding block 10 can move along the linear guide rail 9 together. The edge of the linear guide 9 is abutted against the long step 15 at the lower end of the back plate 14, and the long step 15 provides a certain supporting force for lifting the linear guide 9. Threaded holes are formed in two ends of the linear guide 9, and the linear guide is fixed on the back plate 14 through screws, as shown in fig. 9. The symmetrical surfaces of the T-shaped support 11 are provided with reinforcing ribs, so that the T-shaped support 11 is generally T-shaped as shown in FIG. 8. In the direction vertical to the mirror surface, the thickness of the linear guide rail 9 and the thickness of the central positioning transition block 12 need to be ensured to be equal, and the thickness of the T-shaped support piece 11 and the thickness of the central positioning support 13 need to be ensured to be equal; the central positioning support 13 and the T-shaped support 11 are made of the same invar steel material as the mirror room frame 1; the linear guide rail 9, the slide block 10 and the central positioning transition block 12 are made of the same material.
Mirror room frame flexible support structure includes: the flexible structure comprises a fixed flexible structure and a sliding flexible structure. As shown in fig. 10-12. The fixed flexible structures are arranged in the middle of the upper end face of the mirror chamber frame 1, and the sliding flexible structures are two and symmetrically arranged on two sides of the fixed flexible structures.
The sliding flexible structure includes: the device comprises a linear guide rail 9, a sliding block 10, a flexible rod mounting plate 16, a flexible rod 17 and a flexible rod support 18. The flexible rod mounting plate 16 is fixedly connected to the sliding block 10, the sliding block 10 is mounted on the linear guide rail 9, the edge of the linear guide rail 9 is abutted against the long step 15 at the upper end of the back plate 14, and the long step 15 provides a certain supporting force for lifting the linear guide rail 9; threaded holes are formed in two ends of the linear guide rail 9 and are fixed on the back plate 14 through screws. The mounting end face 6 is arranged on the upper end face of the mirror chamber frame 1 at a symmetrical position relative to the flexible rod mounting plate 16, and the flexible rod support 18 is fixed on the mounting end face 6. One end of the flexible rod 17 is fixedly arranged on the flexible rod mounting plate 16, and the other end is clamped and fastened on the flexible rod support 18 through two nuts 21. The number of flexible rods 17 mounted on the flexible rod mounting plate 16 is two.
The fixed flexible structure includes: flexible rod 17, intermediate flexible rod mount 19, intermediate flexible rod mount 20.
The middle flexible rod base 19 is fixed in the middle position of the upper end of the back plate 14 and corresponds to the rectangular shallow groove 5 of the upper end face of the lens chamber frame 1. And an intermediate flexible rod support 20 is fixed on the mounting end surface 6 right opposite to the rectangular shallow groove 5. One end of the flexible rod 17 is fixedly arranged on the middle flexible rod base 19, and the other end is clamped and fastened on the middle flexible rod support 20 through two nuts 21.
The flexible rod 17 is of a variable cross-section beam structure and is characterized in that under the premise of sufficient static rigidity, when the flexible rod is excited by external vibration, the flexible rod can absorb the vibration energy through deformation of a flexible link of the flexible rod to reduce the influence of the vibration on the other end; the flexible rod support 18 and the middle flexible rod support 20 are made of the same material as the mirror chamber frame 1; the linear guide rail 9, the sliding block 10, the flexible rod mounting plate 16 and the middle flexible rod base 19 are made of the same material, and the sum of the thicknesses of the linear guide rail 9, the sliding block 10 and the flexible rod mounting plate 16 in the direction perpendicular to the mirror surface is equal to the thickness of the middle flexible rod base 19 in the direction. The thermal expansion coefficients of the same materials are the same, and the thermal expansion in the direction of the vertical back plate is in direct proportion to the size of the part in the direction at the same environmental temperature, so the sum of the sizes of the constraint linear guide rail 9, the sliding block 10 and the flexible rod mounting plate 16 in the direction is equal to the size of the middle flexible rod base 19 in the direction, the expansion amounts of the whole sliding flexible structure and the whole fixed flexible structure in the direction of the vertical back plate at the same environmental temperature are the same, and the thermal stress moment is not generated on the mirror chamber frame 1.
During installation: matching surfaces, threaded holes and glue injection holes 22 connected with the rigid supporting structure and the flexible structure are formed in the upper side wall and the lower side wall of the mirror chamber frame 1 and are symmetrically distributed, as shown in fig. 14; the left side wall and the right side wall of the mirror chamber frame 1 are provided with symmetrically distributed threaded holes and glue injection holes; the glue injection holes are used for injecting optical glue spots after the reflector 7 is installed in the reflector chamber, the optical glue spots are specifically distributed as shown in figure 14, and the threaded holes are used for connecting components such as a support and the like; the other surfaces of the reflector 7 are planes, the four side planes are in bonding fit with the mirror chamber frame 1 through optical glue spots with certain thickness, and the front surface of the reflector is in direct positioning fit with the flange end surface 2 of the mirror chamber frame 1; the lens chamber frame 1 and the pressing block 8 are made of the same material, no interaction force is generated during thermal expansion, and 704 optical cement is adopted as the optical cement spots 23. In the process of installing the reflector 7 into the mirror chamber frame 1, the clearance between the four side surfaces is ensured to be 0.5mm by virtue of a feeler gauge, no gap is left between the reflector and the contact matching surface of the flange, the reflector is supported and positioned by adopting a ball head bolt after being installed, and then optical cement spots are injected.
After the optical glue spots are cured, the reflector is slightly subjected to the curing shrinkage tensile stress of the glue layer, the influence on the mirror surface shape is small, in addition, the additional stress is not applied, and the influence is only caused by gravity under the static condition. The coefficient of thermal expansion of the invar steel material adopted by the mirror chamber frame 1 is similar to that of the microcrystalline glass material adopted by the reflector 7, and the adopted optical cement spots have larger coefficient of thermal expansion in the radial direction and smaller elastic modulus, so that the reflector has larger margin of thermal expansion, and the mirror surface is greatly attenuated under the influence of vibration.
The overall schematic diagram of the vibration-resistant and heat-dissipating supporting mechanism of the rectangular reflector with large length-width ratio is shown in FIG. 10, the vibration-resistant and heat-dissipating rigid supporting structure mainly plays a role in rigid supporting and positioning, the middle jacking block and the linear guide rail assembly have the same thickness dimension constraint in the direction vertical to the mirror surface, the middle flexible rod support, the linear guide rail and the sliding block pressing plate assembly have the same thickness dimension constraint in the direction vertical to the mirror surface, and the mirror chamber is subjected to uniform thermal expansion stress in the direction vertical to the mirror surface and has no stress moment; the thermal expansion stress in the length direction of the mirror chamber and the internal stress caused by the vibration interference in the direction are released by the free displacement of the six groups of guide rail sliding blocks, and the direction has no stress; the thermal expansion stress in the gravity direction and the internal stress caused by the vibration interference in the gravity direction are attenuated by the flexible joint deformation release of the flexible link, and the influence is small.
Because the temperature of the working environment of the reflector is relatively high, the temperature is about 70 ℃ at most, the surface shape of the reflector is affected by the thermal expansion of the reflector, so the heat dissipation treatment is mainly carried out through the following two aspects: on one hand, the glue layer on the reflector ensures that the reflector has certain thermal expansion space in a reflector chamber, does not generate too large thermal stress and has certain vibration resistance and buffering effect; on the other hand, the reflector back plate and the reflector room frame are made of materials with larger difference of thermal expansion coefficients, larger thermal stress can be generated and transmitted to the reflector, the measure is that the transverse guide rail enables the reflector room frame to freely expand transversely relative to the back plate, and the flexible structure not only reduces vibration, but also enables the reflector room frame to have a certain longitudinal expansion space relative to the back plate.
The invention is not limited to the specific technical solutions described in the above embodiments, and all technical solutions formed by equivalent substitutions are within the scope of the invention as claimed.
Claims (13)
1. The utility model provides a big length-width ratio rectangle speculum's anti vibration heat dissipation supporting mechanism which characterized in that includes: the mirror room frame (1), the reflector (7), the back plate (14), the mirror room frame rigid supporting structure and the mirror room frame flexible supporting structure; the reflector (7) is arranged in the mirror chamber frame (1), and the back plate (14) is arranged on the rear side surface of the mirror chamber frame (1); the rigid supporting structure of the mirror room frame is arranged on the lower bottom surface of the mirror room frame (1); the flexible supporting structure of the mirror chamber frame is arranged on the upper bottom surface of the mirror chamber frame (1).
2. The anti-vibration and heat-dissipation supporting mechanism of the rectangular reflector with the large length-width ratio as claimed in claim 1, wherein the main body of the reflector chamber frame (1) is in a long rectangular frame structure and has 4 surfaces, namely an upper bottom surface, a lower bottom surface, a left side surface and a right side surface; the front surface of the mirror chamber frame (1) is provided with a flange end surface (2) which is matched with the reflector (7) in a positioning way; sinking surfaces (4) are symmetrically arranged on the back surface of the mirror chamber frame (1) at the edge of the frame at certain intervals, and each sinking surface (4) is provided with a threaded hole matched with one pressing block (8).
3. The anti-vibration and heat-dissipation support mechanism for the rectangular reflector with the large length-width ratio is characterized in that the upper bottom surface of the reflector chamber frame (1) is provided with a rectangular shallow groove (5) and a mounting end surface (6); the flexible support structure is used for being matched with the installation of the mirror chamber frame; threaded holes are formed in the mounting end face (6) and the sinking face (4); the lower bottom surface of the mirror chamber frame (1) is provided with a threaded hole for matching with the installation of a rigid supporting structure of the mirror chamber frame.
4. The anti-vibration and heat dissipation supporting mechanism of the rectangular reflector with the large length-width ratio is characterized in that the section of the reflector (7) is in a convex shape, the back surface of the reflector (7) is a spherical surface, and the other surfaces are planes; the upper and lower edges of the spherical surface are processed into flat end surfaces; the reflector (7) is arranged in the mirror chamber frame (1), and the front end face of the reflector (7) is directly positioned and matched with the flange end face (2); one end of the pressing block (8) is installed in the sinking surface (4) and fixed through a screw, and the other end of the pressing block (8) presses the flat end surface of the spherical edge of the reflector (7) and is fixedly connected with the flat end surface through glue dispensing.
5. The anti-vibration and heat-dissipation supporting mechanism of the rectangular reflector with the large length-width ratio as claimed in claim 1, wherein a long rectangular through hole is formed in the middle of the back plate (14), and two long steps (15) are respectively arranged at the upper end and the lower end of the back plate; and a threaded hole which is installed in a matched mode is arranged.
6. The vibration-resistant and heat-dissipating support mechanism for a rectangular reflector with a large length-to-width ratio as claimed in claim 1, wherein said rigid support structure for the mirror housing frame comprises: a T-shaped support structure and a central positioning support structure; the central positioning support structure is arranged in the middle of the lower bottom surface of the mirror chamber frame (1), and T-shaped support structures are symmetrically distributed on two sides of the central positioning support structure at certain intervals.
7. The vibration and heat resistant support mechanism for a large aspect ratio rectangular reflector of claim 6, wherein the centrally located support structure comprises: a central positioning transition block (12) and a central positioning support (13);
countersunk through holes are symmetrically distributed on the left and right sides of the upper end surface of the central positioning support (13), are matched with threaded holes on the lower bottom surface of the mirror chamber frame (1) in an installing way, and are fixedly connected through screws; the rear end surface is provided with a finish machining penetrating positioning hole positioned in the center of the symmetry axis and through holes symmetrically distributed left and right; the central positioning transition block (12) is provided with a finish machining positioning matching hole which is coaxial with the positioning hole of the central positioning support (13) and threaded holes which are symmetrically distributed left and right; the central positioning support (13) is fixed on the back plate (14) together with the central positioning transition block (12) through screws.
8. The vibration-resistant and heat-dissipating support mechanism for a rectangular reflector with a large length-to-width ratio as claimed in claim 6, wherein the T-shaped support structure comprises: the device comprises a linear guide rail (9), a slide block (10) and a T-shaped support piece (11); countersunk through holes which are distributed in bilateral symmetry are formed in the upper end face of the T-shaped supporting piece (11) and are matched with threaded holes in the lower bottom surface of the mirror chamber frame (1) for mounting and fastening through bolts; the rear end face of the T-shaped support piece (11) is provided with through holes which are distributed in bilateral symmetry and fastened with the sliding block (10) through bolts, the sliding block (10) is fixed on the rear end face of the T-shaped support piece (11), the sliding block (10) is installed on the linear guide rail (9), the edge of the linear guide rail (9) is abutted against a long step (15) at the lower end of the back plate (14), and two ends of the linear guide rail (9) are provided with threaded holes which are fixed on the back plate (14) through screws; the symmetrical surface of the T-shaped support part (11) is provided with a reinforcing rib.
9. The vibration-resistant and heat-dissipating support mechanism for a rectangular reflector with a large length-to-width ratio as claimed in claim 6, wherein the T-shaped support structure comprises: the device comprises a linear guide rail (9), a slide block (10) and a T-shaped support piece (11); the centrally located support structure comprises: a central positioning transition block (12) and a central positioning support (13); in the direction vertical to the mirror surface, the thickness of the linear guide rail (9) is equal to that of the central positioning transition block (12), and the thickness of the T-shaped support (11) is equal to that of the central positioning support (13); the central positioning support (13) and the T-shaped support (11) are made of invar steel materials the same as the mirror room frame (1); the linear guide rail (9), the sliding block (10) and the central positioning transition block (12) are made of the same material.
10. The vibration-resistant and heat-dissipating support mechanism for a rectangular reflector with a large length-to-width ratio as claimed in claim 1, wherein the flexible support structure for the mirror chamber frame comprises: the flexible structure comprises a fixed flexible structure and a sliding flexible structure; the fixed flexible structure is arranged in the middle of the upper end surface of the mirror chamber frame (1); the sliding flexible structures are symmetrically arranged on two sides of the fixed flexible structure.
11. The anti-vibration and heat-dissipation supporting mechanism for the rectangular reflector with large length-to-width ratio as claimed in claim 10, wherein the sliding flexible structure comprises: the device comprises a linear guide rail (9), a sliding block (10), a flexible rod mounting plate (16), a flexible rod (17) and a flexible rod support (18); the flexible rod mounting plate (16) is fixedly connected to the sliding block (10), the sliding block (10) is mounted on the linear guide rail (9), the edge of the linear guide rail (9) is abutted against the long step (15) at the upper end of the back plate (14), and threaded holes are formed in the two ends of the linear guide rail (9) and are fixed on the back plate (14) through screws; an installation end face (6) is arranged at the opposite position of the upper end face of the mirror chamber frame (1) relative to the flexible rod installation plate (16), and the flexible rod support (18) is fixed on the installation end face (6); one end of a flexible rod (17) is fixedly arranged on the flexible rod mounting plate (16), and the other end of the flexible rod (17) is clamped and fastened on a flexible rod support (18) through two nuts (21); the number of the flexible rods (17) arranged on the flexible rod mounting plate (16) is two.
12. The mechanism of claim 10, wherein the fixed flexible structure comprises: a flexible rod (17), a middle flexible rod base (19) and a middle flexible rod support (20); the middle flexible rod base (19) is fixed in the middle position of the upper end of the back plate (14) and corresponds to the rectangular shallow groove (5) on the upper end surface of the mirror chamber frame (1); a middle flexible rod support (20) is fixed on the mounting end surface (6) opposite to the rectangular shallow groove (5); one end of the flexible rod (17) is fixedly arranged on the middle flexible rod base (19), and the other end of the flexible rod is clamped and fastened on the middle flexible rod support (20) through two nuts (21).
13. The anti-vibration and heat-dissipation supporting mechanism for the rectangular reflector with large length-to-width ratio as claimed in claim 10, wherein the fixed flexible structure comprises: a flexible rod (17), a middle flexible rod base (19) and a middle flexible rod support (20); the sliding flexible structure includes: the device comprises a linear guide rail (9), a sliding block (10), a flexible rod mounting plate (16), a flexible rod (17) and a flexible rod support (18); the sum of the thicknesses of the linear guide rail (9), the sliding block (10) and the flexible rod mounting plate (16) in the direction vertical to the mirror surface is equal to the thickness of the middle flexible rod base (19) in the direction; the flexible rod support (18) and the middle flexible rod support (20) are made of the same material as the lens chamber frame (1); the linear guide rail (9), the sliding block (10), the flexible rod mounting plate (16) and the middle flexible rod base (19) are made of the same material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211532993.8A CN115951470A (en) | 2022-12-02 | 2022-12-02 | Vibration-resistant and heat-dissipating supporting mechanism of rectangular reflector with large length-width ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211532993.8A CN115951470A (en) | 2022-12-02 | 2022-12-02 | Vibration-resistant and heat-dissipating supporting mechanism of rectangular reflector with large length-width ratio |
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| CN115951470A true CN115951470A (en) | 2023-04-11 |
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|---|---|---|---|
| CN202211532993.8A Pending CN115951470A (en) | 2022-12-02 | 2022-12-02 | Vibration-resistant and heat-dissipating supporting mechanism of rectangular reflector with large length-width ratio |
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| CN (1) | CN115951470A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075328A (en) * | 2023-10-16 | 2023-11-17 | 中国科学院西安光学精密机械研究所 | Polygonal reflector compliant heat elimination support assembly in laser scanner |
| CN118151326A (en) * | 2024-05-09 | 2024-06-07 | 中国科学技术大学 | Weak stress clamping structure of reflector in synchronous radiation light source |
-
2022
- 2022-12-02 CN CN202211532993.8A patent/CN115951470A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075328A (en) * | 2023-10-16 | 2023-11-17 | 中国科学院西安光学精密机械研究所 | Polygonal reflector compliant heat elimination support assembly in laser scanner |
| CN117075328B (en) * | 2023-10-16 | 2024-01-30 | 中国科学院西安光学精密机械研究所 | Polygonal reflector compliant heat elimination support assembly in laser scanner |
| CN118151326A (en) * | 2024-05-09 | 2024-06-07 | 中国科学技术大学 | Weak stress clamping structure of reflector in synchronous radiation light source |
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