CN115571385A - Buffering and fixing structure for microgravity double-body falling cabin and microgravity double-body falling cabin - Google Patents
Buffering and fixing structure for microgravity double-body falling cabin and microgravity double-body falling cabin Download PDFInfo
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- CN115571385A CN115571385A CN202211399725.3A CN202211399725A CN115571385A CN 115571385 A CN115571385 A CN 115571385A CN 202211399725 A CN202211399725 A CN 202211399725A CN 115571385 A CN115571385 A CN 115571385A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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Abstract
The invention relates to the technical field of microgravity measurement, in particular to a buffering and fixing structure for a microgravity double-body drop cabin and the microgravity double-body drop cabin, wherein the buffering and fixing structure comprises a buffering block and a plurality of arrowheads, and Li Zu is arranged on the bottom surface of an inner cabin; the buffer block is arranged on the bottom surface of the inner part of the outer cabin below Li Zu; in the microgravity test experiment, when the cabin body falling test is finished, the buffer deceleration can be formed on the inner cabin through the matching effect of the arrowroot at the bottom end of the inner cabin and the buffer block on the bottom surface inside the outer cabin, the kinetic energy of the inner cabin is absorbed, the direct collision of the inner cabin and the outer cabin is prevented, and the inner cabin is fixed through the friction force between the buffer block and the arrowroot, so that the rebound prevention effect is achieved; the problem that in the microgravity measurement, the structure and instruments in the cabin are damaged due to collision or rebound between the inner cabin and the outer cabin is solved.
Description
Technical Field
The invention relates to the technical field of microgravity measurement, in particular to a buffering and fixing structure for a microgravity double-body falling cabin and the microgravity double-body falling cabin.
Background
In order to realize the establishment of an inertial sensor in a precision gravity measurement facility in the aerospace field and physical simulation thereof, the current mainstream method is to perform a test on the ground, so that a cabin body carrying the sensor falls in a tower with higher vacuum degree, and the sensor is in an approximately weightless state in a short time, thereby realizing the simulation of the microgravity environment of the in-orbit spacecraft. In order to further reduce air resistance and form a lower gravity environment, the method of adding an outer cabin and an inner cabin is currently used in the leading research. The inner compartment is disposed in the outer compartment, is shorter than the outer compartment in the axial direction, and is free from contact on the sidewall surface. The inner chamber is released ahead of the outer chamber when the test is started, and in the falling process, the outer chamber bears most of air resistance relative to the tower falling speed, and the inner chamber and the outer chamber bear smaller aerodynamic resistance due to smaller relative speed, so that a lower gravity environment can be realized.
However, with the design scheme of the inner chamber and the outer chamber, when the falling and the recovery are carried out, the outer chamber contacts with the buffer facility and is rapidly decelerated, the inner chamber and the outer chamber can collide violently and rebound, and the structure and the instruments in the inner chamber are damaged. There are currently some mechanical structures that can lock the outer tank securely at the end of the fall. However, the contact time between the lower end of the inner cabin and the bottom of the outer cabin and the contact time between the outer cabin and the buffer facility are strictly required, and the situation that the locking cannot be successfully performed due to the advance or the delay can cause the damage of the inner cabin.
Therefore, a need exists for a structure that integrates buffering and fixing between an inner cabin and an outer cabin and simultaneously achieves buffering and fixing after the inner cabin falls.
Disclosure of Invention
Aiming at the problem that in the microgravity measurement in the prior art, the structure and instruments in the capsule are damaged due to collision or rebound between an inner capsule and an outer capsule, the invention provides a buffering and fixing structure for a microgravity double-body falling capsule and the microgravity double-body falling capsule.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a buffering and fixing structure for a microgravity double-body drop cabin comprises a buffering block and a plurality of arrow- -arrowheads, wherein the Li Zu is arranged on the bottom surface of an inner cabin; the buffer block is arranged on the inner bottom surface of the outer cabin below Li Zu.
Preferably, a connecting plate is arranged between the inverted-T-shaped groove and the bottom surface of the inner cabin and is used for fixedly connecting the inverted-T-shaped groove to the bottom surface of the inner cabin.
Preferably, a buffer block connecting piece is arranged between the buffer block and the bottom surface inside the outer cabin and used for fixedly connecting the buffer block to the bottom surface inside the outer cabin.
Preferably, the arrowheads are made of metal, carbon fiber or glass fiber.
Preferably, the length of arrowhead is 40-200 mm, and the diameter of arrowhead is 5-20 mm.
Preferably, the buffer block is a foamed rubber buffer block or a foamed plastic buffer block.
Preferably, the buffer block is made of chemically cross-linked polyethylene foam or foamed ethylene-vinyl acetate copolymer.
Preferably, the distance from the upper surface of the buffer block to the inverted-Y tip is greater than or equal to the distance of relative movement between the inner chamber and the outer chamber.
Preferably, the thickness of the buffer block is equal to or greater than the length of the arrowhead.
The invention also provides a microgravity double-body falling cabin which comprises the buffering and fixing structure.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a buffering and fixing structure for a microgravity double-body drop cabin, which comprises a plurality of arrowheads arranged at the bottom of an inner cabin and a buffering block arranged at the bottom surface of the inner part of an outer cabin; the setting of buffer block can make it when the experimental cabin body of microgravity falls to retrieve, forms the buffering to the interior cabin, absorbs interior cabin kinetic energy, simultaneously, the cooperation setting of the arrowhead-on with the buffer block, can make the buffer block to the arrowhead-on realize that the extrusion relies on stiction to tightly grasp interior cabin, effectively prevent the rebound of interior cabin, rock and empty the realization fixed to interior cabin to prevent because of its rebound or rock the secondary that causes interior cabin and interior cabin internals and destroy. Compared with the traditional mechanical fixing structure, the inverted-Y-shaped buffer block structure provided by the invention can integrate buffering and fixing functions, is simple in structure, can avoid system instability caused by excessive number of parts inside the cabin body, is soft and uniform in speed reduction process, and has the advantages that the friction force between Li Zu and the buffer block is approximately positively correlated with the inverted-Y-shaped insertion depth, namely the braking force of the inner cabin is gradually increased, the collision with the inner cabin is avoided, the impact load is prevented from being generated, the double-cabin body and the internal test instrument are effectively protected, and the service life of the double-cabin body and the internal test instrument is prolonged. Secondly, in the stage of finishing falling, no matter the moment of the contact of the bottoms of the two cabins is before or after the moment of the sudden deceleration of the outer cabin falling into the recovery barrel, the Li Zu is matched with the buffer block, the deceleration buffer and the fixation of the inner cabin can be formed, the allowable range of the time difference is large, the range of the test conditions can be greatly widened, the test data under different variables can be obtained, and meanwhile, the damage caused by the fact that the two cabins cannot be smoothly contacted and fixed due to accidents can be effectively prevented.
Furthermore, due to the arrangement of the connecting disc and the connecting piece, the whole buffering fixing structure can be detachably connected, so that the buffering fixing structure is convenient to replace and low in cost.
Furthermore, the arrowheads are made of metal, carbon fiber or glass fiber, so that the requirements on hardness and strength during buffering in the microgravity test can be met, and the material is wide in source, reusable and low in price.
Further, the buffer block adopts expanded rubber or expanded plastics, not only can form the buffering to the interior cabin better, absorbs interior cabin kinetic energy, can rely on stiction to the interior cabin through the extrusion to the arrowhead again, effectively prevent the rebound of interior cabin, rock and empty to further avoid the damage of important instrument in the interior cabin, can reuse nearly hundred times and low cost moreover.
Furthermore, the arrangement of the thickness of the buffer block and the distance from the upper surface of the buffer block to the inverted-arrowhead can effectively avoid the injury to the bottom surface of the inner part of the cabin caused by the inverted-arrowhead due to the incomplete buffering in the descending process due to the insufficient thickness of the buffer block.
The invention also provides a microgravity double-body falling cabin which comprises the buffering and fixing structure, so that the inner cabin can be buffered and the kinetic energy of the inner cabin can be absorbed in a microgravity test, meanwhile, the inner cabin is fixed through the matching of the buffering and fixing structure, and the secondary damage to the inner cabin and internal test parts caused by the rebound or shaking of the inner cabin is reduced. The structure is simple, the service life is long, and the maintenance cost is low.
Drawings
Fig. 1 is a schematic view of a buffering and fixing structure for a microgravity double-body falling cabin of the invention.
Fig. 2 is a state diagram of the buffering fixing structure of the microgravity double-body drop cabin in the microgravity experiment.
The inner cabin comprises an outer cabin body 1, an inner cabin body 2, a connecting disc 3, an inverted-T-shaped groove 4, a buffer block 5, a connecting piece 6 and an inner bottom surface of the outer cabin body 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be broadly construed and interpreted as including, for example, fixed connections, detachable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Referring to fig. 1, the invention discloses a buffering and fixing structure for a microgravity double-body drop cabin, which comprises a connecting disc 3, a buffering block 5, a connecting piece 6 and a plurality of arrowons 4; the connecting disc 3 is arranged on the bottom surface of the inner cabin 2, the inverted-U-shaped groove 4 is made of metal, carbon fiber or glass fiber and is arranged on the bottom surface of the connecting disc 3, preferably, the inverted-U-shaped groove 4 is 40-200 mm in length, and the inverted-U-shaped groove 4 is 5-20 mm in diameter; the connecting piece 6 is of a detachable structure, is arranged on the bottom surface 7 inside the outer cabin below the arrowhead-4, and can be a magic tape, a buckle or a bolt and other accessories with detachable characteristics; the buffer block 5 is arranged on the connecting piece 6, the buffer block 5 is made of foamed rubber or foamed plastic, preferably, the buffer block 5 is made of chemically cross-linked polyethylene foam or foamed ethylene-vinyl acetate copolymer, the distance from the upper surface of the buffer block 5 to the point of the arrowhead-4 is more than or equal to the distance of the relative movement between the inner chamber 2 and the outer chamber 1, the thickness of the buffer block 5 is equal to or greater than the length of arrowroot 4.
Referring to fig. 2, the working principle is as follows:
before the experiment begins, the inner cabin 2 and the outer cabin 1 are hoisted, the experiment is unfolded, and the double cabins begin to fall.
When the falling process is close to the end, the outer cabin 1 starts to decelerate, and the inner cabin 2 rapidly rushes to the inner bottom surface 7 of the outer cabin; with further shortening of the distance between the inner compartment 2 and the inner bottom surface 7 of the outer compartment, the pointed end of arrowhead 4 at the lower portion of the inner compartment 2 penetrates into the bumper 5, which due to the resilient nature of the bumper 5 creates resistance against the conical surface of the pointed end of arrowhead 4 causing the inner compartment 2 to slow down.
Then, the arrowhead 4 continuously goes deep into the buffer block 5, when the cylindrical section of the arrowhead 4 enters the buffer block 5, the rebound extrusion of the buffer block 5 forms a friction force opposite to the movement direction of the inner chamber 2 on the surface of the cylindrical section of the arrowhead 4, and the friction force acts on the whole inner chamber 2 to force the inner chamber 2 to continue to decelerate.
Finally, as the depth of the cylindrical segment of arrowhead 4 into the bumper 5 increases, the friction increases gradually until the speed of the inner chamber 2 is the same as the speed of the outer chamber 1 or even the relative movement stops completely.
In the process, the kinetic energy of the inner cabin 2 relative to the outer cabin 1 is absorbed by the buffer block 5, most of the kinetic energy is converted into internal energy due to friction, and the situation of rebound cannot occur; moreover, due to the fact that the insertion depth of the parts with the arrowheads 4 is deepest when the parts with the arrowheads 5 stop, the maximum static friction force is at the maximum value, even if the outer cabin 2 is toppled over after the test and is carried, the parts with the arrowheads 4 of the inner cabin can be tightly grasped by the buffer blocks 5, the inner cabin 2 is prevented from colliding with the inner wall of the outer cabin 1, and secondary damage to the parts such as the cabin body and the internal sensor is prevented.
In the subsequent experiment process, the inner cabin 2 can be unfolded again only by pulling out the arrowhead-shaped part 4 together with the inner cabin 2 and hoisting the inner cabin again. Buffer block 5 can used repeatedly nearly hundred times and low cost, prick into many times and appear falling bits or damaged condition only need through the detachable mode change new installation can.
In carrying out the microgravity test experiment, when the cabin body drop test was ended, interior 2 do-it-your 4 pricks into buffer block 5, forms the buffering speed reduction from this, prevents direct collision to through the fixed interior of frictional force between buffer block 5 and the do-it-your 4, reach the effect that prevents its bounce-back.
The invention also provides a microgravity double-body falling cabin which comprises the buffering and fixing structure, the buffering of the inner cabin can be realized in a microgravity test, the kinetic energy of the inner cabin is absorbed, meanwhile, the fixing of the inner cabin is realized through the matching of the buffering and fixing structure, and the secondary damage of the inner cabin and internal test parts caused by the rebound or shaking of the inner cabin is reduced. The structure is simple, the service life is long, and the maintenance cost is low.
In conclusion, the invention provides a buffering and fixing structure for a microgravity double-body falling cabin and the microgravity double-body falling cabin, when a cabin body falling test is finished, the buffering and speed reduction can be formed on the inner cabin 2 through the matching action of the inverted-upon-arrowroot 4 at the bottom end of the inner cabin 2 and the buffering block on the bottom surface 7 inside the outer cabin, the kinetic energy of the inner cabin 2 is absorbed, the direct collision of the inner cabin and the outer cabin is prevented, the inner cabin 2 is fixed through the friction force between the buffering block 5 and the inverted-upon-arrowroot 4, the rebound prevention effect is achieved, and the problem that the cabin structure and instruments are damaged due to the collision or rebound between the inner cabin and the outer cabin in microgravity measurement in the technology is solved.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and it should be understood by those skilled in the art that the technical solution can be modified and replaced by a plurality of simple modifications and replacements without departing from the spirit and principle of the present invention, and the modifications and replacements also fall into the protection scope covered by the claims.
Claims (10)
1. A buffering and fixing structure for a microgravity double-body drop cabin is characterized by comprising a buffering block (5) and a plurality of arrow- -roots (4), wherein the Li Zu (4) is arranged on the bottom surface of an inner cabin (2); the buffer block (5) is arranged on the inner bottom surface (7) of the outer cabin below Li Zu (4).
2. The buffering and fixing structure for the microgravity double-body drop cabin as claimed in claim 1, wherein a connecting plate (3) is arranged between Li Zu (4) and the bottom surface of the inner cabin (2) for fixedly connecting the inverted-arrowhead (4) to the bottom surface of the inner cabin (2).
3. The buffering and fixing structure for the microgravity double-body drop cabin as claimed in claim 1, wherein a buffering block connecting piece (6) is arranged between the buffering block (5) and the inner bottom surface (7) of the outer cabin and is used for fixedly connecting the buffering block (5) to the inner bottom surface (7) of the outer cabin.
4. The buffering and fixing structure for the microgravity double-body drop cabin of claim 1, wherein the Li Zu (4) is made of metal, carbon fiber or glass fiber.
5. The buffering and fixing structure for the microgravity double-body drop cabin as claimed in claim 1, wherein the length of Li Zu (4) is 40 mm-200 mm, and the diameter of Li Zu (4) is 5 mm-20 mm.
6. The buffering and fixing structure for the microgravity double-body drop cabin of claim 1, wherein the buffering block (5) is a foamed rubber buffering block or a foamed plastic buffering block.
7. Buffer fixing structure for microgravity twin-body drop cabins according to claim 6, characterized in that the buffer block (5) is made of chemically cross-linked polyethylene foam or foamed ethylene-vinyl acetate copolymer.
8. The buffer fixing structure for a microgravity double-body drop tank of any one of claims 1-7, wherein the distance from the upper surface of the buffer block (5) to the apex of the arrowhead (4) is greater than or equal to the distance of relative movement of the inner tank (2) and the outer tank (1).
9. Buffer fixing structure for a microgravity double-body drop cabin according to any of claims 1-7, characterized in that the thickness of the buffer block (5) is equal to or greater than Li Zu (4).
10. A microgravity twin-body drop chamber comprising a cushioning fixation structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211399725.3A CN115571385A (en) | 2022-11-09 | 2022-11-09 | Buffering and fixing structure for microgravity double-body falling cabin and microgravity double-body falling cabin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211399725.3A CN115571385A (en) | 2022-11-09 | 2022-11-09 | Buffering and fixing structure for microgravity double-body falling cabin and microgravity double-body falling cabin |
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| CN115571385A true CN115571385A (en) | 2023-01-06 |
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| CN202211399725.3A Pending CN115571385A (en) | 2022-11-09 | 2022-11-09 | Buffering and fixing structure for microgravity double-body falling cabin and microgravity double-body falling cabin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609854A (en) * | 2023-07-21 | 2023-08-18 | 华中科技大学 | Ground testing device and method for inspection quality in-orbit release process |
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2022
- 2022-11-09 CN CN202211399725.3A patent/CN115571385A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609854A (en) * | 2023-07-21 | 2023-08-18 | 华中科技大学 | Ground testing device and method for inspection quality in-orbit release process |
| CN116609854B (en) * | 2023-07-21 | 2023-09-19 | 华中科技大学 | Ground testing device and method for inspection quality in-orbit release process |
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