CN113247314B - Tether ejection mechanism suitable for passive release of space tether system - Google Patents

Abstract

The invention relates to the technical field of space rope systems, in particular to a rope fastening ejection mechanism suitable for passively releasing a space rope system. The invention can achieve the effects of avoiding the damage of the tether and enhancing the reliability of the ejection device.

Description

A tether ejection mechanism suitable for passive release of space tether system

technical field

The present invention relates to the technical field of space tether systems, in particular to a tether ejection mechanism suitable for passive release of the space tether system.

Background technique

The space tether system is a new type of space flight system, which has great application potential in space garbage removal, artificial gravity, and deep space exploration. The basic structure of the space tether system is a thin and long tether connecting two spacecraft. The total length of the tether can range from hundreds of meters to hundreds of kilometers according to different application scenarios, and the diameter of the tether is about 1-2mm. . When the space tether system is assembled on the ground, the tether should be wound on the rope shaft or stacked, and the system will be launched into orbit and then the internal tether will be released. There are two tether release methods: active release and passive release. Using the power mechanism or device of the system to release the tether is called active release, and using the action of gravity gradient force to release the tether is called passive release. The passive release method has a simple structure and high reliability. At present, this method is mostly used in space tethering tasks, but it relies on the characteristics of gravity gradient force release, so that the tether release should initially obtain a certain kinetic energy, so that the tether can reach a certain length. , so as to obtain enough gravity gradient force to drive the tether release. The passive release of the space tether system often uses a catapult to obtain kinetic energy from the tether.

At present, most of the space tethering systems use pyrotechnic devices for ejection. Explosive bolts are used to fix the projectile to be ejected on the ejection platform. A spring is installed on the ejection platform and is pressed between the ejection platform and the projectile to be ejected. . During the ejection, the gunpowder in the explosive bolt is exploded through the circuit signal to break it. After losing the restraint of the explosive bolt, the projectile is ejected by the compressed spring. Although the explosive ejection of pyrotechnics is a relatively mature method, its explosion position is close to the tether of the space tether system, which is easy to cause damage to the surface of the tether or even lead to breakage; at the same time, to ensure the ejection stability, it is usually necessary to use two One or more explosive bolts are used for fixing, and the increase in the number also reduces the reliability of the ejection method. Therefore, it is necessary to design an ejection mechanism suitable for the space tether system.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a tether ejection mechanism suitable for passive release of a space tether system, so as to solve the above problems, avoid damage to the tether and enhance the reliability of the ejection device.

For achieving the above object, the present invention provides the following scheme:

A tether ejection mechanism suitable for passive release of a space tether system includes a base, a plurality of ejection assemblies are fixedly connected above the base, a projectile base is elastically arranged above the plurality of ejection assemblies, and the bottom of the base and all the ejection assemblies are elastically arranged. A number of snap-release components are arranged between the outer sides of the projectile base, a number of the snap-release components correspond to the positions of a number of the ejection components, and a number of the snap-release components are sleeved with the snap-release components. Rope assembly to achieve release.

Preferably, the ejection assembly includes a compression spring sleeve, the compression spring sleeve is fixedly connected above the base, a compression spring is arranged inside the compression spring sleeve, and one end of the compression spring is fixedly connected to the base , the other end of the compression spring is in contact with the projectile base.

Preferably, the snap-release assembly includes a first fixing hook, the first fixing hook is hooked with a second fixing hook, the first fixing hook is rotatably connected with the outer side of the compression spring sleeve, and the second fixing hook is connected A hook is fixedly attached below the projectile base.

Preferably, the rope assembly includes a tension spring cylinder, the tension spring cylinder is fixedly connected above the base, a tension spring is fixedly connected to the inner wall of the tension spring cylinder, a tether is fixedly connected to the tension spring, and the tie The two ends of the rope are respectively fixedly connected with the two ends of the tension spring, the rope fuse is threaded on the tether, and the tether is arranged around the outside of the first fixing hooks.

Preferably, an opening is formed at one end of the compression spring sleeve close to the projectile base, and the opening divides the upper part of the compression spring sleeve into two semi-arc structures, and the semi-arc structures are vertically arranged. A plurality of through holes are provided, the through holes are perpendicular to the axis of the compression spring sleeve, the through holes on the two semi-arc structures correspond to each other, and a pair of the through holes are provided with locking pins.

Preferably, the projectile base is provided with a plurality of guide holes, the guide holes are semi-circular structures, and the guide holes are matched with the semi-arc structures.

Preferably, a second bracket is fixedly connected to the outside of the compression spring sleeve, the second bracket is perpendicular to the axis of the compression spring sleeve, and one end of the second bracket away from the compression spring sleeve is rotatably connected with a pin a shaft, the pin shaft is rotatably connected with the upper part of the first fixing hook;

A first bracket is fixedly connected above the base, the first bracket corresponds to the position of the first fixing hook, the first bracket is perpendicular to the base, and one end of the first bracket away from the base is connected to the base. The second bracket is fixedly connected, a compression spring bracket is fixedly connected to the middle and lower part of the first bracket, and a second compression spring is fixedly connected to the compression spring bracket and the first fixing hook.

Preferably, a plurality of the ejection assemblies are arranged at equal intervals along the edge of the base, and the number of the ejection assemblies is at least three.

Preferably, the base and the center of the projectile base are respectively provided with wiring holes.

Preferably, the end of the second fixing hook is provided with a plurality of hook teeth matched with the first fixing hook, the number of the hook teeth is at least two, and the hook teeth are along the axis direction of the compression spring sleeve Arranged at equal intervals.

The present invention has the following technical effects:

1. A tether ejection mechanism suitable for the passive release of the space tether system of the present invention, the base of the projectile and the base are fixed by a snap release component, the ejection component provides the power for ejection, and the rope component controls the snap connection. The disengagement of the release assembly realizes the ejection of the projectile base through the mechanical structure, which is simple and reliable; this design not only facilitates the installation of the projectile base, but also ensures that the tether is not damaged during the release process, which is more efficient than traditional pyrotechnic ejection. The mode is more suitable for the tether release of the space tether system.

2. The elastic force of the ejection assembly of the present invention can be adjusted and connected as required, and the adjustment method is simple. Compared with the traditional pyrotechnic ejection mechanism, it is difficult to adjust the elastic force after processing. Compared with this, the present invention has looser processing design requirements.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is A-A sectional view in Fig. 2;

FIG. 4 is a partial enlarged view of B in FIG. 1 .

Among them, 1, the base; 2, the first fixing hook; 3, the rope; 4, the rope fuse; 5, the tension spring; 6, the tension spring cylinder; 7, the projectile base; 8, the second fixing hook; 9, The first compression spring; 10, the compression spring sleeve; 11, the lock pin; 12, the compression spring bracket; 13, the second compression spring; 14, the first bracket; 15, the second bracket.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

1-4, a tether ejection mechanism suitable for passive release of a space tether system of the present invention includes a base 1, a plurality of ejection assemblies are fixedly connected above the base 1, and a projectile base 7 is elastically arranged above the plurality of ejection assemblies , between the bottom of the base 1 and the outer side of the projectile base 7 are provided with a number of snap-release components, a number of snap-release components correspond to the positions of a number of ejection components, and a number of snap-release components are sleeved with a release mechanism that enables the snap-release components to be released. rope assembly. The base 1 serves as a bearing base for the ejection mechanism, and also serves as a component of the ejection mechanism connected with other tether release mechanisms (eg, tether braking mechanism, tether storage mechanism, etc.). The projectile base 7 and the base 1 are fixed by a snap release component, the ejection component provides the power for the ejection, the rope component controls the release of the snap release component, and the ejection of the projectile base 7 is realized through the mechanical structure, which is simple Reliable; the design not only facilitates the installation of the projectile base 7, but also ensures that the tether is not damaged during the release process. Compared with the traditional pyrotechnic ejection method, it is more suitable for the tether release of the space tether system; ejection The elastic force of the component can be adjusted as required, and the adjustment method is simple. It is difficult to adjust the elastic force after the traditional pyrotechnic ejection mechanism is processed. Compared with the present invention, the processing design requirements are looser.

To further optimize the solution, the ejection assembly includes a compression spring sleeve 10 , the compression spring sleeve 10 is fixedly connected above the base 1 , a first compression spring 9 is arranged inside the compression spring sleeve 10 , and one end of the first compression spring 9 is fixedly connected to the base 1 . , the other end of the first compression spring 9 is in contact with the projectile base 7 . The first compression spring 9 provides power for the ejection assembly. The first compression spring 9 can be selected according to the size of the elastic force. The outer wall of the compression spring sleeve 10 cooperates with the projectile base 7 to install the compression spring sleeve 10 guidance in the process.

To further optimize the solution, the snap release assembly includes a first fixing hook 2, the first fixing hook 2 is hooked with a second fixing hook 8, the first fixing hook 2 is rotatably connected to the outside of the compression spring sleeve 10, and the second fixing hook 8 is fixedly connected Below the projectile base 7 . When the first fixing hook 2 and the second fixing hook 8 are hooked to each other, the projectile base 7 is in a state to be ejected, and when the first fixing hook 2 and the second fixing hook 8 are disengaged, the projectile base 7 is in a compressed state. The first compression spring 9 is ejected, and the projectile base 7 drives the rope system to extend into space.

To further optimize the solution, the rope assembly includes a tension spring cylinder 6, the tension spring cylinder 6 is fixedly connected to the top of the base 1, the inner wall of the tension spring cylinder 6 is fixedly connected with a tension spring 5, and the tension spring 5 is fixedly connected with a rope 3, and the two ends of the rope 3 are respectively connected with each other. The two ends of the tension spring 5 are fixedly connected, the rope 3 is provided with a rope fuse 4 , and the rope 3 is arranged around the outside of the first fixing hooks 2 . The rope fuse 4 is powered by a satellite, and the rope 3 is preferably a nylon rope. When the projectile base 7 needs to be ejected, the rope fuse 4 fuses the rope 3, and the rope 3 loses its binding effect on the first fixing hook 2. The first fixing hook 2 and the second fixing hook 8 are disengaged, so that the projectile base 7 is ejected, and an electric heating wire is installed inside the rope fuse 4, and the electric heating wire is powered by the satellite and can fuse the rope 3.

To further optimize the solution, an opening is provided at one end of the compression spring sleeve 10 close to the projectile base 7, and the opening divides the upper part of the compression spring sleeve 10 into two semi-arc structures, and the semi-arc structures are vertically provided with a number of through holes, The through hole is perpendicular to the axis of the compression spring sleeve 10 , the through holes on the two semi-arc structures correspond to each other, and a pair of through holes are provided with locking pins 11 . The lock pin 11 is used to lock the projectile base 7 and plays an insurance role. The lock pin 11 prevents the projectile base 7 from being accidentally ejected; The lock pin 11 is pulled out by the astronaut during the space experiment.

In a further optimization scheme, the projectile base 7 is provided with a number of guide holes, the guide holes are semi-circular structures, and the guide holes are matched with the semi-arc structure at the upper end of the compression spring sleeve 10 . The guide holes facilitate the installation of the projectile base 7 and play a guiding role.

To further optimize the solution, a second bracket 15 is fixedly connected to the outside of the compression spring sleeve 10 , the second bracket 15 is perpendicular to the axis of the compression spring sleeve 10 , and one end of the second bracket 15 away from the compression spring sleeve 10 is rotatably connected with a pin shaft. The shaft is rotatably connected with the upper part of the first fixing hook 2;

A first bracket 14 is fixedly connected above the base 1, the first bracket 14 corresponds to the position of the first fixing hook 2, the first bracket 14 is perpendicular to the base 1, and the end of the first bracket 14 away from the base 1 is fixedly connected with the second bracket 15, A compression spring bracket 12 is fixedly connected to the lower part of the first bracket 14 , and a second compression spring 13 is fixedly connected to the compression spring bracket 12 and the first fixing hook 2 . When the rope 3 is fused, the second compression spring 13 pulls the first fixing hook 2 to move away from the first fixing hook 2 to disengage the first fixing hook 2 and the second fixing hook 8 , thereby releasing the projectile base 7 .

In a further optimized solution, several ejection assemblies are arranged at equal intervals along the edge of the base 1, and the number of ejection assemblies is at least three.

To further optimize the solution, the base 1 and the center of the projectile base 7 are respectively provided with wiring holes. Cable holes are used for long tethers through the tethering system.

In a further optimized solution, the end of the second fixing hook 8 is provided with a number of hook teeth matched with the first fixing hook 2 , the number of hook teeth is at least two, and the hook teeth are arranged at equal intervals along the axis direction of the compression spring sleeve 10 . According to the requirement of elastic force, the second fixing hook 8 can be selected to be connected with different hook teeth of the first fixing hook 2, so that the compression amount of the first compression spring 9 can be adjusted, so as to obtain different elastic forces.

Compared with the prior art, the present invention has the following advantages:

1. The present invention discloses a tether ejection mechanism suitable for passive release of a space tether system. The projectile base 7 is fixed by a simple mechanical structure, and the projectile base 7 can be released without the need for explosives to explode. The design not only facilitates the installation of the projectile base 7, but also ensures that the tether is not damaged during the release process, and is more suitable for the tether release of the space tether system than the traditional pyrotechnic ejection method.

2. A tether ejection mechanism suitable for passive release of a space tether system disclosed in the present invention has a simple mechanical structure and only needs to fuse a nylon rope to achieve ejection, which is more reliable than the traditional pyrotechnic ejection method.

3. A tether ejection mechanism suitable for the passive release of the space tether system disclosed in the present invention can easily adjust the ejection speed by increasing or decreasing the compression amount of the first compression spring 9, only when necessary. Replace the specification of the first compression spring 9 for adjustment. After the traditional pyrotechnic ejection mechanism is processed and installed, it is difficult to adjust the compression amount of the first compression spring 9. Compared with it, the processing design requirements are looser.

In the description of the present invention, it should be understood that the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or It is implied that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

The above-mentioned embodiments are only to describe the preferred mode of the present invention, but not to limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can Variations and improvements should fall within the protection scope determined by the claims of the present invention.

Claims (8)

1. A tether ejection mechanism suitable for passive release of a space tether system, characterized in that it comprises a base (1), a plurality of ejection assemblies are fixedly connected above the base (1), and the upper parts of the ejection assemblies are elastically arranged There is a projectile base (7), a plurality of snap-on release assemblies are arranged between the bottom of the base (1) and the outer side of the projectile base (7), a plurality of the snap-on release assemblies and a plurality of the ejection assemblies Corresponding positions, a plurality of the snap-on release assemblies are sleeved with rope assemblies for enabling the snap-on release assemblies to be released; The ejection assembly includes a compression spring sleeve (10), the compression spring sleeve (10) is fixedly connected above the base (1), and a first compression spring (10) is arranged inside the compression spring sleeve (10). 9), one end of the first compression spring (9) is fixedly connected with the base (1), and the other end of the first compression spring (9) is connected in contact with the projectile base (7); One end of the compression spring sleeve (10) close to the projectile base (7) is provided with an opening, and the opening divides the upper part of the compression spring sleeve (10) into two semi-arc structures, and the half The arc structure is vertically provided with a plurality of through holes, the through holes are perpendicular to the axis of the compression spring sleeve (10), the through holes on the two semi-arc structures correspond to each other, and a pair of the through holes The through hole is provided with a locking pin (11). 2. A tether ejection mechanism suitable for passive release of a space tether system according to claim 1, characterized in that: the snap release assembly comprises a first fixing hook (2), and the first fixing hook ( 2) A second fixing hook (8) is hooked, the first fixing hook (2) is rotatably connected to the outside of the compression spring sleeve (10), and the second fixing hook (8) is fixedly connected to the ejection below the body base (7). 3. A tether ejection mechanism suitable for passive release of a space tether system according to claim 2, characterized in that: the rope assembly comprises a tension spring cylinder (6), and the tension spring cylinder (6) is fixedly connected Above the base (1), a tension spring (5) is fixedly connected to the inner wall of the tension spring cylinder (6), and a rope (3) is fixedly connected to the tension spring (5), and both ends of the rope (3) They are respectively fixedly connected to both ends of the tension spring (5), the rope (3) is provided with a rope fuse (4), and the rope (3) passes around the outside of several first fixing hooks (2). set up. 4. A tether ejection mechanism suitable for passive release of a space tether system according to claim 1, characterized in that: the projectile base (7) is provided with a plurality of guide holes, and the guide holes are semicircular The guide hole is matched with the semi-arc structure. 5. A tether ejection mechanism suitable for passive release of a space tether system according to claim 2, characterized in that: a second bracket (15) is fixedly connected to the outside of the compression spring sleeve (10), and the The second bracket (15) is perpendicular to the axis of the compression spring sleeve (10), and one end of the second bracket (15) away from the compression spring sleeve (10) is rotatably connected with a pin shaft, and the pin shaft is connected to the The upper part of the first fixing hook (2) is rotatably connected; A first bracket (14) is fixedly connected above the base (1), the first bracket (14) corresponds to the position of the first fixing hook (2), and the first bracket (14) (1) Perpendicular, one end of the first bracket (14) away from the base (1) is fixedly connected to the second bracket (15), and a compression spring bracket is fixedly connected to the middle and lower part of the first bracket (14). (12), the compression spring bracket (12) and the first fixing hook (2) are fixedly connected with a second compression spring (13). 6. A tether ejection mechanism suitable for passive release of a space tether system according to claim 1, characterized in that: a plurality of the ejection assemblies are arranged at equal intervals along the edge of the base (1), and the ejection assemblies are arranged at equal intervals along the edge of the base (1). The number is at least three. 7. A tether ejection mechanism suitable for passive release of a space tether system according to claim 1, characterized in that: the base (1) and the center of the projectile base (7) are respectively provided with wirings hole. 8. A tether ejection mechanism suitable for passive release of a space tether system according to claim 2, characterized in that: the end of the second fixing hook (8) is provided with a plurality of numbers corresponding to the first fixing hook (8). 2) The matching hook teeth, the number of the hook teeth is at least two, and the hook teeth are arranged at equal intervals along the axis direction of the compression spring sleeve (10).

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