CN110579856B - Decoupling device for large-field telescope - Google Patents
Decoupling device for large-field telescope Download PDFInfo
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- CN110579856B CN110579856B CN201910884588.4A CN201910884588A CN110579856B CN 110579856 B CN110579856 B CN 110579856B CN 201910884588 A CN201910884588 A CN 201910884588A CN 110579856 B CN110579856 B CN 110579856B
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- shell
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- rolling support
- flexible hinge
- spring
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
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- Optics & Photonics (AREA)
- Telescopes (AREA)
Abstract
The invention relates to a decoupling device for a large-field telescope, which comprises a shell, a coupling mechanism and a coupling mechanism, wherein an elastic piece is accommodated in the shell, a top cover is arranged at the top of the elastic piece, and a cavity is formed by the top cover and the shell; the top of the shell is provided with an opening; the rolling support assembly is arranged above the top cover and positioned in the cavity, and comprises a support frame and a ball group arranged in the support frame; the flexible hinge assembly is used for supporting the primary mirror and comprises a flexible hinge and a movable plate connected to the bottom of the flexible hinge, the flexible hinge penetrates through an opening of the shell, the movable plate is arranged on the rolling support assembly, the width of the cavity is larger than the length of the movable plate, and the movable plate can horizontally move in the cavity in a left-right mode. The decoupling device is suitable for the condition that the primary mirror needs to have larger transverse displacement in a telescope, and is compatible with an overload protection function.
Description
Technical Field
The invention relates to the technical field of telescopes, in particular to a decoupling device for a large-field telescope.
Background
In recent years, the gradual development of the domestic telescope technology makes the high-resolution pursuit and the high search speed become the research target of researchers, and the large-caliber large-view-field telescope comes into play. The large-caliber large-view-field telescope provides a new requirement for a primary mirror supporting technology, namely, the axial supporting mechanism has an overload protection function when the primary mirror is influenced by earthquake, wind load and the like and is subjected to overload stress except for meeting the axial support of the primary mirror in a non-interference environment; in addition, in order to match with the design of a large-caliber large-view field, the axial support needs to allow the main mirror to perform millimeter-order transverse displacement under the condition of ensuring the support, and the traditional flexible rod axial support cannot meet the requirement. Therefore, redesign of the axial support of large bore, large field of view telescopes is required.
Disclosure of Invention
The invention mainly solves the technical problem of providing a decoupling device for a large-field telescope, which is suitable for the condition that a primary mirror needs to have larger transverse displacement in the telescope and is compatible with an overload protection function.
In order to solve the technical problems, the invention adopts a technical scheme that:
a decoupling apparatus for a large field of view telescope, comprising:
the elastic piece is accommodated in the shell, a top cover is arranged at the top of the elastic piece, and the top cover and the shell form a cavity; the top of the shell is provided with an opening;
the rolling support assembly is arranged above the top cover and positioned in the cavity, and comprises a support frame and a ball group arranged in the support frame;
the flexible hinge assembly is used for supporting the primary mirror and comprises a flexible hinge and a movable plate connected to the bottom of the flexible hinge, the flexible hinge penetrates through an opening of the shell, the movable plate is arranged on the rolling support assembly, the width of the cavity is larger than the length of the movable plate, and the movable plate can horizontally move in the cavity in a left-right mode.
In one embodiment, the rolling support assembly comprises a first rolling support assembly and a second rolling support assembly which are arranged up and down, and the moving plate is arranged between the first rolling support assembly and the second rolling support assembly.
In one embodiment, the shell comprises a shell, and an upper cover and a bottom cover which are respectively arranged at two ends of the shell, wherein an upper retaining ring and a disk spring are sequentially arranged between the upper cover and the first rolling support assembly from bottom to top, and the flexible hinge is arranged in the upper retaining ring and the disk spring in a penetrating mode.
In one embodiment, the upper baffle ring and the first rolling support assembly are in interference fit with an inner hole wall formed by the upper cover, so that the upper baffle ring and the first rolling support assembly are fixed in the transverse direction inside the shell.
In one embodiment, an oilless bushing is arranged in the shell, the elastic piece is arranged in the oilless bushing and is in clearance fit with the oilless bushing, and the oilless bushing is in interference fit with the shell.
In one embodiment, the elastic member is a spring, and the bottom of the housing is provided with a protrusion, which is matched with an inner hole at the bottom of the spring.
In one embodiment, the diameter of the top cover is larger than that of the opening, the spring is compressed and packaged in the shell, the compression amount of the pressed spring multiplied by the spring stiffness is an overload protection force value, and the compression amount is determined according to the height of the oilless bushing.
In one embodiment, the housing comprises a shell, and an upper cover and a bottom cover which are respectively arranged at two ends of the shell, wherein the upper cover and the bottom cover are both in threaded connection with the shell.
In one embodiment, the balls of the ball group are uniformly distributed on the support frame.
The invention has the beneficial effects that: compared with the prior art, the decoupling device for the large-field telescope is suitable for the condition that a primary mirror needs to have large transverse displacement in the telescope, and is compatible with an overload protection function. In addition, compare with the simple flexible rod support of tradition, utilize ball group to make the lateral displacement of primary mirror not only rely on the flexibility of flexible rod, can shorten primary mirror supporting mechanism height for whole mechanism is compacter. The overload protection function of the primary mirror enables the supporting part of the primary mirror to be changed into an elastic body from a rigid body when the primary mirror is subjected to overlarge external loads such as earthquake wind load and the like, so that the primary mirror is prevented from being subjected to overlarge stress, and the overload protection value can be set according to requirements.
Drawings
FIG. 1 is a schematic half-section view of an embodiment of a decoupling apparatus for a large field of view telescope;
FIG. 2 is a schematic view of the coupling position of the decoupling assembly for a large field of view telescope in one embodiment;
FIG. 3 is a schematic size diagram of an embodiment of a decoupling apparatus for a large field of view telescope.
Detailed Description
Referring to fig. 1 to 3, the present invention provides a decoupling device 100 for a large field of view telescope, including a housing, a rolling support assembly accommodated in the housing, and a flexible hinge assembly passing through the housing, wherein the flexible hinge assembly is driven by the rolling support assembly to move left and right (move in a transverse direction).
Specifically, the decoupling device 100 comprises a flexible hinge assembly 1, a disc spring 2, an upper cover 3, an upper retainer ring 4, a ball group 5, a support frame 6, a top cover 7, an oilless bushing 8, an elastic piece 9, a shell 10 and a bottom cover 11.
The upper cover 3 and the bottom cover 11 are disposed at both ends of the housing 10, and the three together form a housing, and specifically, the upper cover 3 and the bottom cover 11 are both screwed with the housing 10. An opening is arranged in the middle of the upper cover 3, and a bulge is arranged on the bottom cover 11. The elastic member 9 is accommodated in the housing, and both ends of the elastic member 9 are respectively abutted against the top cover 7 and the bottom cover 11. Furthermore, the elastic element 9 is a spring, the protrusion of the bottom cover 11 is matched with an inner hole at the bottom of the spring, the lower part of the top cover 7 is connected with the spring, the oilless bushing 8 is arranged in the shell, the top cover 7 and the oilless bushing 8 are in clearance fit, and the oilless bushing 8 and the shell 10 are in interference fit. The diameter of the top cover 7 is larger than that of the opening, the spring is compressed and packaged in the shell, the compression amount of the pressed spring multiplied by the rigidity of the spring is an overload protection force value, and the compression amount is determined according to the height of the oilless bushing 8. The housing 10, the top cover 7 and the upper cover 3 form a cavity, and the rolling support assembly is arranged on the top cover 7 and located in the cavity.
The flexible hinge assembly 1 includes a flexible hinge passing through an opening of the upper cover 3, and a moving plate connected to a bottom of the flexible hinge. Specifically, the diameter of the opening is larger than that of the opening part of the flexible hinge, the moving plate is located on the ball bearing assembly 6 and contained in the cavity, the width of the cavity is larger than the length of the moving plate, and the moving plate can transversely move left and right in the cavity. Specifically, the difference between the width of the cavity and the length of the moving plate is the lateral movement range of the moving plate, that is, the lateral movement range of the flexible hinge assembly 1.
Specifically, the rolling support assembly comprises a first rolling support assembly and a second rolling support assembly which are arranged up and down, the first rolling support assembly and the second rolling support assembly respectively comprise a support frame 6 and a ball group 5 arranged on the support frame 6, and a plurality of balls of the ball group 5 are uniformly distributed on the support frame 6. Further, the moving plate is disposed between the first rolling support assembly and the second rolling support assembly. The lower surface of the moving plate is in contact with the ball group 5 on the second rolling support assembly. The flexible hinge separates the first rolling support assembly into a left part and a right part, and the upper surface of the moving plate is in contact with the ball group 5 of the first rolling support assembly. When the moving plate moves left and right, the moving plate is driven by the ball group 5 to move in the transverse direction. Keep off ring 4, belleville spring 2 from supreme being equipped with in proper order down between upper cover 3 and the first support component that rolls, flexible hinge wears to establish in keeping off ring 4 and belleville spring 2 last. The upper baffle ring 4 plays a role in isolation, prevents the disc spring 2 from being directly clamped on the ball group 5, and limits the ball group 5 on the balls of the support frame 6.
The size relationship of the decoupling device is shown in fig. 3, and it is assumed that the diameter of the top cover 7 is a1, the inner hole values of the housing 10 from top to bottom are b1 and b2, the inner hole values of the top cover 3 from top to bottom are c1 and c2, respectively, and the length of the moving plate of the flexible hinge assembly 1 is d 1. The requirement is satisfied that the diameter a1 > c1 of the cover 7 is such that the spring 9 is compressed and enclosed in the housing 10, and the amount of compression of the spring which is pressed in is multiplied by the spring stiffness to give the overload protection force value. The amount of compression can be controlled by the size L of the housing 10. The length d1 < b1 of the movable plate of the flexible hinge assembly 1, and half of the difference between d1 and b1 is the transverse movement (left-right translation) range of the flexible hinge assembly 1. The upper baffle ring 4 and the support frame 6 are in interference fit with the inner hole c2 of the upper cover 3, so that the upper baffle ring 4 and the support frame are fixed in the lateral direction inside the shell 10.
The assembly method of the decoupling device comprises the following steps: the oilless bushing 8 is first installed into the housing 10, the top cover 7 and the spring 9 are put in from below the housing 10, and the bottom cover 11 is screwed to the housing 10. The amount of compression of the spring pressed in at this time multiplied by the stiffness of the spring is the overload protection value. A second rolling support component, a flexible hinge component 1, a first rolling support component, an upper retaining ring 4 and a disc spring 2 are sequentially arranged above the top cover 7, and finally the upper cover 3 is in threaded connection with a shell 10. The belleville springs 2 are now used to compress the rolling support assembly, the flexible hinge assembly 1, and the rolling support assembly. As shown in fig. 2, the decoupling device normally supports the primary mirror, and when the primary mirror needs to move laterally, the flexible hinge assembly 1 can move along the lateral direction, the moving distance is determined by the gap between the flexible hinge assembly 1 and the housing 10, and the flexible hinge assembly 1 utilizes elastic deformation to decouple the bending moment applied to the primary mirror. When the primary mirror is subjected to overlarge external loads such as earthquake wind load and the like, namely the external loads exceed the pre-pressing protection value of the spring, the primary mirror can move downwards along with the flexible hinge assembly 1 and fall into safety protection.
Compared with the prior art, the decoupling device for the large-field telescope is suitable for the condition that a primary mirror needs to have large transverse displacement in the telescope, and is compatible with an overload protection function. In addition, compare with the simple flexible rod support of tradition, utilize ball group to make the lateral displacement of primary mirror not only rely on the flexibility of flexible rod, can shorten primary mirror supporting mechanism height for whole mechanism is compacter. The overload protection function of the primary mirror enables the supporting part of the primary mirror to be changed into an elastic body from a rigid body when the primary mirror is subjected to overlarge external loads such as earthquake wind load and the like, so that the primary mirror is prevented from being subjected to overlarge stress, and the overload protection value can be set according to requirements.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A decoupling apparatus for a large field of view telescope, comprising:
the elastic piece is accommodated in the shell, a top cover is arranged at the top of the elastic piece, and the top cover and the shell form a cavity; the top of the shell is provided with an opening;
the rolling support assembly is arranged above the top cover and positioned in the cavity, and comprises a support frame and a ball group arranged in the support frame;
the flexible hinge assembly is used for supporting the primary mirror and comprises a flexible hinge and a moving plate connected to the bottom of the flexible hinge, the flexible hinge penetrates through an opening of the shell, the moving plate is arranged on the rolling support assembly, the width of the cavity is greater than the length of the moving plate, and the moving plate can horizontally move in the cavity in a left-right mode;
the rolling support assembly comprises a first rolling support assembly and a second rolling support assembly which are arranged up and down, and the moving plate is arranged between the first rolling support assembly and the second rolling support assembly; an oilless bushing is arranged in the shell, the elastic piece is arranged in the oilless bushing and is in clearance fit with the oilless bushing, and the oilless bushing is in interference fit with the shell; the elastic piece is a spring, a bulge is arranged at the bottom of the shell, and the bulge is matched with an inner hole at the bottom of the spring; the diameter of the top cover is larger than that of the opening, the spring is compressed and packaged in the shell, the compression amount of the pressed spring multiplied by the rigidity of the spring is an overload protection force value, and the compression amount is determined according to the height of the oilless bushing.
2. The de-coupling device for the large-field telescope of claim 1, wherein the casing comprises a casing, and an upper cover and a bottom cover respectively disposed at two ends of the casing, an upper baffle ring and a disc spring are sequentially disposed between the upper cover and the first rolling support assembly from bottom to top, and the flexible hinge is disposed through the upper baffle ring and the disc spring.
3. The de-coupling apparatus for a large field telescope of claim 2, wherein the upper baffle ring and the first rolling support assembly are in interference fit with an inner bore wall formed by the upper cover, such that the upper baffle ring and the first rolling support assembly are fixed in a lateral direction inside the casing.
4. The de-coupling apparatus for a large field of view telescope of claim 1, wherein the housing comprises a casing, and an upper cover and a bottom cover respectively disposed at two ends of the casing, wherein the upper cover and the bottom cover are both threadedly coupled to the casing.
5. The de-coupling apparatus for a large field of view telescope of claim 1, wherein said plurality of balls of said set of balls are evenly distributed on said support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884588.4A CN110579856B (en) | 2019-09-19 | 2019-09-19 | Decoupling device for large-field telescope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884588.4A CN110579856B (en) | 2019-09-19 | 2019-09-19 | Decoupling device for large-field telescope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110579856A CN110579856A (en) | 2019-12-17 |
| CN110579856B true CN110579856B (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910884588.4A Active CN110579856B (en) | 2019-09-19 | 2019-09-19 | Decoupling device for large-field telescope |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6196515B1 (en) * | 1999-09-07 | 2001-03-06 | Lockheed Martin Corporation | Load equalization support system |
| CN103616116B (en) * | 2013-11-25 | 2016-01-27 | 燕山大学 | Mechanically decoupled heavy duty six-dimension force-measuring platform in parallel |
| CN105372002B (en) * | 2015-11-25 | 2018-01-23 | 燕山大学 | The double ball decoupling six-dimension force plate/platforms of orthogonal self-calibration branch |
| CN208010846U (en) * | 2018-03-20 | 2018-10-26 | 杨益文 | Damper with non-newtonian fluid |
| CN109683277B (en) * | 2019-01-24 | 2021-05-18 | 中国科学院长春光学精密机械与物理研究所 | High-precision adjusting device for large-caliber main mirror chamber |
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