CN111591471A - Braking sail derailing device applied to standing satellite - Google Patents
Braking sail derailing device applied to standing satellite Download PDFInfo
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- CN111591471A CN111591471A CN202010362316.0A CN202010362316A CN111591471A CN 111591471 A CN111591471 A CN 111591471A CN 202010362316 A CN202010362316 A CN 202010362316A CN 111591471 A CN111591471 A CN 111591471A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/24—Guiding or controlling apparatus, e.g. for attitude control
- B64G1/242—Orbits and trajectories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/62—Systems for re-entry into the earth's atmosphere; Retarding or landing devices
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Abstract
The invention belongs to the field of spacecraft derailment, and particularly relates to a brake sail derailing device applied to a standing satellite. The sail storage device, the driving device, the unfolding device and the locking device are sequentially arranged from top to bottom; storing the film sail in a sail storage device; the unfolding device comprises four strip-shaped elastic masts and a mast central shaft, the extension sections of the strip-shaped elastic masts are connected with the film sails, and the fixed ends of the strip-shaped elastic masts are wound on the mast central shaft; the four wound strip-shaped elastic masts are unfolded, so that the film sail connected with the four strip-shaped elastic masts is driven to be unfolded; the driving device is used for driving the strip-shaped elastic mast in the unfolding device to unfold; the locking device is used for locking the unfolding device in a locking state. The off-orbit device provided by the invention is suitable for off-orbit of the cuboids running in the medium and low orbit, and solves the problem that the cuboids cannot be off-orbit within a specified time after completing tasks, so that space debris is formed to influence the normal work of other satellites.
Description
Technical Field
The invention belongs to the field of spacecraft derailment, and particularly relates to a brake sail derailing device applied to a standing satellite.
Background
Cube star (cube sat) is a standard of cube star proposed by both university of California and Stanford university in 1999. The volume and shape of the cube star are standardized, the basic unit is a cube of 10cm multiplied by 10cm, generally called 1U cube star, and the cube star is also called 2U cube star, 3U cube star and the like after the corresponding unit number is increased, and the structure is simple.
The cubic star gradually becomes a research hotspot at home and abroad due to a series of advantages of low cost, short development period, high functional density and the like, and the emission quantity of the cubic star is increased in a blowout mode in the future. These cubic satellites are usually distributed in low earth orbit, and if the satellite is not processed off-orbit after completing the mission, the failed cubic satellites become space debris, so that the near earth orbit becomes more and more "crowded", seriously threatens other normally operating spacecrafts and restricts the development of future aerospace technology. At present, the number of space debris is increasing at a rate of about 5% per year, and they continue to move around the earth at high speeds, creating a unique space debris environment around the earth. In a near-earth orbit, the flight speed of space debris is generally several kilometers per second, when the space debris collides with a spacecraft, the relative speed can reach more than 10km/s, and the space debris with the diameter of 1cm can cause fatal damage to the normally working spacecraft. Furthermore, collisions between space debris and other objects create large amounts of new space debris, increasing the risk of collisions, creating a vicious circle.
In order to reduce the number of space debris and ensure the on-orbit operation environment of the spacecraft, the organization space debris coordination committee publishes a space debris mitigation guideline and recommends that the spacecraft should be out of orbit within 25 years after completing a mission or within 30 years after entering orbit. Therefore, in the future development process of the cube satellite, the on-orbit flight time of the satellite must be fully considered and a corresponding satellite off-orbit technology must be equipped, so that the cube satellite is ensured to be quickly separated from the orbit after completing the flight task, space debris is avoided, and sustainable utilization of space resources is guaranteed.
The sail braking and derailing technology is used for forming sails in various shapes by extending a film through a support mast, so that the cross section area of a satellite in the speed direction is increased, the atmospheric resistance effect on the satellite is increased, and the satellite derailing is accelerated. The method has the characteristics of simple structure, low cost and the like, and is suitable for the cubic star of the near-earth orbit.
The traditional unfolding mode of the brake sail derailing technology in China mainly depends on elastic strain energy stored in a mast, the unfolding reliability of the method is poor, particularly when the area of the sail is large or the storage time is long, an ideal unfolding effect is difficult to achieve, and the derailing time of the cube star is further influenced.
Disclosure of Invention
The invention aims to provide a braking sail derailing device applied to a cube star, which is suitable for the derailment of the cube star running in a medium-low orbit and solves the problem that the normal work of other satellites is influenced because part of the cube star can not be derailed within a specified time after completing a task.
The technical solution for realizing the purpose of the invention is as follows: a braking sail derailing device applied to a standing satellite comprises a sail storage device, a driving device, an unfolding device and a locking device which are sequentially arranged from top to bottom.
The unfolding device comprises four strip-shaped elastic masts and a mast central shaft, the extension sections of the strip-shaped elastic masts are connected with the film sails, and the fixed ends of the strip-shaped elastic masts are wound on the mast central shaft; the four wound strip-shaped elastic masts are unfolded, so that the film sail connected with the four strip-shaped elastic masts is driven to be unfolded;
the driving device is used for driving the strip-shaped elastic mast in the unfolding device to unfold;
the locking device is used for locking the unfolding device in a locking state.
Further, the sail storage device further includes: the sail storage bin is arranged on the side surface of the sail storage device and is provided with four trapezoidal groove-shaped sail storage bins and a thin film sail fixing block;
the film sail is stored in the sail storage bin, and one corner of the film sail is fixed on a central structure of the sail storage bin through a film sail fixing block.
Furthermore, a triangular groove and a triangular boss are respectively arranged on the sail storage bin and the film sail fixing block, so that the film sail fixing position is prevented from being separated.
Furthermore, the unfolding device also comprises an outer shell, an end cover, four pressing mechanisms, four pairs of friction wheels and four pairs of friction wheel shafts;
the unfolding device is of a centrosymmetric structure, four pairs of friction wheels are fixedly connected to friction wheel shafts and are positioned at the same positions of four corners of the unfolding device through third bearing grooves in the outer shell and the end cover, and a gap of 1-2mm is reserved between each pair of friction wheels;
the mast central shaft is positioned at the center of the unfolding device and can rotate around the center, and four pairs of threaded holes are uniformly distributed in the circumferential direction of the mast central shaft and used for fixing the strip-shaped elastic mast;
the positioning center of the pressing mechanism is arranged between every two pairs of friction wheels, can rotate around the positioning center and is used for pressing the strip-shaped elastic mast so as to prevent the strip-shaped elastic mast from being 'burst' in the device when in a contraction state;
the four strip-shaped elastic masts are clockwise wound on the central shaft of the mast, and the unfolding section extends outwards through the gap between each pair of friction wheels by means of power provided by the friction wheels when the four strip-shaped elastic masts are unfolded.
Further, the pressing mechanism comprises a guide roller, a support plate and a pair of torsion springs;
one side of the supporting plate is provided with a guide roller mounting groove for mounting a guide roller, and the other side of the supporting plate is provided with two torsion spring mounting grooves; through holes are formed in the two sides of the support plate and respectively penetrate through the guide roller connecting bolt and the positioning bolt of the support plate;
bearing grooves are formed in the upper side and the lower side of the guide roller for assembling bearings; one side of the torsion spring is limited by the supporting plate, and the other side of the torsion spring is limited by the device connecting bolt, so that the pressing force transmitted to the strip-shaped elastic mast by the pressing mechanism is provided.
Furthermore, a second boss is arranged at the center inside the outer shell and used for assembling a rolling bearing, and the central shaft of the mast is positioned at the center of the device;
four pairs of bearing grooves are formed in the same positions of four corners of the bottom of the outer shell and used for positioning the friction wheel shaft; the friction wheel shaft penetrates out of a third through hole 28 in the first bearing groove;
grooves are formed in four side edges of the outer shell and used for extending and unfolding the strip-shaped elastic mast;
bosses and bearing grooves are respectively arranged at the outer center and the four corners of the outer shell to assemble rolling bearings; and a countersunk hole for positioning and pressing the mechanism is reserved between each two pairs of bearing grooves, and the four countersunk holes are symmetrically distributed along the center.
Furthermore, a fourth bearing groove and a mast central shaft extending hole are sequentially formed in the center of the end cover and used for positioning and fixing a mast central shaft;
bearing holes are arranged at corresponding positions of four corners of the end cover, and rolling bearings are assembled and used for positioning and fixing the friction wheel shafts;
further, the friction wheel shaft is a stepped shaft, wherein the section of a part matched with the friction wheel and the friction wheel gear is D-shaped so as to transmit power.
Further, the driving device comprises a motor, a central large gear and a friction wheel gear;
the output shaft of the motor is a D-shaped shaft, and the D-shaped shaft is connected with the central gearwheel through a D-shaped hole and transmits the power of the motor to the central gearwheel;
the friction wheel gear is a small gear, a D-shaped through hole is formed in the center of the friction wheel gear and matched with the friction wheel shaft, and the friction wheel gear is meshed with the central large gear to transmit power to the friction wheel.
Further, the locking device comprises a pair of locking clamping blocks and a pair of tension springs;
one end of the tension spring is connected with a first boss with a second through hole on the lower surface of the end cover, and the other end of the tension spring is connected with a boss with a first through hole on the side surface of the locking clamping block;
the bottom of the locking clamping block is provided with a regular hexagonal groove, the top of the mast center shaft is provided with a regular hexagonal boss, and the regular hexagonal boss is matched with the regular hexagonal groove arranged at the bottom of the locking clamping block and used for locking the mast center shaft;
an annular groove is formed in the circumferential direction of the outer side of the locking clamping block and used for locking the locking clamping block through a nylon rope;
the locking device is characterized by further comprising a wire burning module used for burning off the nylon ropes in the circumferential direction of the locking clamping blocks, the two locking clamping blocks are separated from each other under the action of the tension springs fixedly connected with the locking clamping blocks, and the locking device is unlocked.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the invention has small volume and light weight, meets the design requirements of the miniaturization and light weight of the cube star, is suitable for the off-orbit of the cube star running in the middle and low orbit, and solves the problem that the space fragment can not be off-orbit in the specified time after part of the cube star completes the task to influence the normal work of other satellites;
(2) according to the invention, a power source is added into the device, and the unfolding process is controllable, so that the unfolding reliability of the braking sail can be further improved;
(3) on the basis that the reliability of the unfolding of the device is ensured, the area of the braking sail can be further enlarged, and the application range of the braking sail derailing device is widened;
(4) the invention has compact structure, good structural integrity of the main frame and strong shock resistance and vibration resistance, and can ensure the normal work of the device;
(5) the invention has simple structure and low processing cost, and is very suitable for the cube star with short task period;
(6) the invention can expand and add the expansion circuit and the modularized power supply, improve the independence of the device, and ensure the reliability of the off-track system while not interfering other systems.
Drawings
Fig. 1 is an external structural view of the derailing apparatus of the present invention in an assembled state.
FIG. 2 is a schematic structural diagram of a memory device according to the present invention.
Fig. 3 is a perspective view of the deployment device of the present invention.
Fig. 4 is a schematic structural diagram of the pressing mechanism of the present invention.
FIG. 5 is a schematic structural diagram of an outer casing of the deployment device of the present invention; wherein, the figure (a) is a schematic diagram of the internal structure of the outer shell, and the figure (b) is a schematic diagram of the external structure of the outer shell.
FIG. 6 is a schematic view of the end cap configuration of the deployment device of the present invention.
Fig. 7 is a top view of the driving device of the present invention.
Fig. 8 is a schematic structural view of the locking device of the present invention.
FIG. 9 is a schematic view of the construction of the central shaft of the mast of the present invention.
Description of reference numerals:
1-sail storage bin, 2-membrane sail fixing block, 3-membrane sail, 4-sail storage device, 5-unfolding device, 6-mast central shaft, 7-strip elastic mast, 8-friction wheel, 9-friction wheel shaft, 10-support plate, 11-guide roller, 12-pressing mechanism, 13-friction wheel gear, 14-central large gear, 15-driving device, 16-locking device, 17-locking clamp block, 18-annular groove, 19-first through hole, 20-second through hole, 21-first boss, 22-end cover, 23-outer shell, 24-groove, 25-second boss, 26-first bearing groove, 27-second bearing groove, 28-third through hole, 29-countersunk hole, 30-a third boss, 31-a mast central shaft extension hole, 32-a third bearing groove, 33-a regular hexagon boss, 34-a tension spring, 35-a torsion spring, 36-a fourth through hole, 37-a threaded hole, 38-a triangular boss, 39-a triangular groove and 40-a fourth bearing groove.
Detailed Description
The device is further described with reference to the accompanying drawings.
With reference to fig. 1, a braking sail derailing device applied to a cube star occupies a space volume of 100mm × 160mm, and includes a sail storage device 4, a driving device 15, a deployment device 5, and a locking device 16 from top to bottom.
With reference to fig. 2, the sail storage device 4 includes a sail storage bin 1, a film sail 3 and a film sail fixing block 2, wherein the sail storage bin 1 is 4 trapezoidal grooves for storing the film sail 3; a blind hole is formed in the center of the sail storage bin 1 and used for fixing a motor for providing power for the device; the film sail fixing block 2 is provided with a through hole and can be fixedly connected to the sail storage bin 1 through a screw, and one corner of the film sail 3 can be fixed on the central structure of the sail storage bin 1; meanwhile, in order to ensure the fixing reliability of the film sail 3, triangular grooves 39 and triangular bosses 38 are respectively arranged on the sail storage bin 1 and the film sail fixing block 2, so that the fixing position of the film sail 3 is prevented from being separated; screw holes 37 are arranged at four corners of the upper part of the sail storage bin 1 and used as mechanical interfaces connected with the cuboids, and a fourth through hole 36 is arranged at a position close to a side line and used for connecting an expansion circuit module and a modularized power supply.
With reference to fig. 3 and 1, the deployment device 5 includes an outer housing 23, an end cover 22, a mast central shaft 6, four band-shaped elastic masts 7, four hold-down mechanisms 12, four pairs of friction wheels 8 and four pairs of friction wheel shafts 9.
The unfolding device 5 is of a centrosymmetric structure, four pairs of friction wheels 8 are fixedly connected to the friction wheel shaft 9 and are positioned at the same positions of four corners of the device through the outer shell 23 and the third bearing grooves 32 on the end cover 22, and a gap of 1-2mm is reserved between each pair of friction wheels 8; the mast central shaft 6 is positioned at the center of the device and can rotate around the center; the positioning center of the pressing mechanism 12 is arranged between every two pairs of friction wheels 8 and is respectively hinged with the outer shell 23 and the end cover 22, and the mechanism can rotate around the positioning center; four strip-shaped elastic masts 7 are wound on the mast central shaft 6 clockwise, and when unfolded, the extension sections pass through the gaps between each pair of friction wheels 8 and extend outwards by virtue of the power provided by the friction wheels 8.
Referring to fig. 4 and 3, the pressing mechanism 12 includes a guide roller 11, a support plate 10 and a pair of torsion springs 35, wherein one side of the support plate 10 is provided with a guide roller mounting groove for mounting the guide roller, and the other side is provided with two torsion spring mounting grooves; through holes are formed in the two sides of the supporting plate and respectively penetrate through the guide roller connecting bolt and the positioning bolt of the supporting plate 10; bearing grooves are formed in the upper side and the lower side of the guide roller 11 for assembling bearings, so that friction between the guide roller and the supporting plate during rotation is reduced; the torsion spring 35 is retained by the support plate 10 on one side and by the device attachment bolt on the other side to provide a pressing force transmitted by the pressing mechanism 12 to the strip-shaped elastic mast 7.
Referring to fig. 5, the inner center of the outer housing 23 is provided with a second boss 25 for assembling a rolling bearing to position the mast central shaft 6 at the center of the device; four pairs of first bearing grooves 26 are arranged at the same positions of four corners of the bottom and are used for positioning the friction wheel shaft 9; the friction wheel shaft 9 can pass through a third through hole 28 in the first bearing groove 26; grooves 24 are arranged on four side edges to ensure that the strip-shaped elastic mast 7 can extend and unfold; similarly, the outer center and four corners are respectively provided with a third boss 30 and a second bearing groove 27 for assembling a rolling bearing, aiming at reducing the friction when the mechanism rotates; and a countersunk hole 29 for positioning the pressing mechanism 12 is reserved between each two pairs of second bearing grooves 27, and four countersunk holes 29 are symmetrically distributed along the center.
With reference to fig. 6 and 8, a fourth bearing groove 40 and a mast central shaft extending hole 31 are sequentially formed in the center of the end cover 22 for positioning and fixing the mast central shaft 6; the corresponding positions of the four corners are provided with third bearing grooves 32 which are assembled with rolling bearings and used for positioning and fixing the friction wheel shaft 9; two first bosses 21 are arranged at opposite corners of the back surface of the end cover, second through holes 20 are formed in the side surfaces of the first bosses 21, and the locking device is used for fixing a tension spring 34.
With reference to fig. 9, four pairs of threaded holes are uniformly arranged in the circumferential direction of the mast central shaft 6 for fixing the strip-shaped elastic mast; the top is provided with a regular hexagon boss 33, which is convenient for the locking device to lock the mast central shaft 6.
Referring to fig. 3, the friction wheel shaft 9 is a stepped shaft in which a portion of a cross section that is engaged with the friction wheel 8 and the friction wheel gear 13 is D-shaped to transmit power.
Referring to fig. 7, the driving device 15 includes a motor, a central gearwheel 14 and a friction wheel gear 13, an output shaft of the motor is a D-shaped shaft, and the D-shaped shaft is connected with the central gearwheel 14 through a D-shaped hole to transmit power of the motor to the central gearwheel 14; the friction wheel gear 13 is a small gear, a D-shaped through hole is formed in the center of the friction wheel gear 13 and matched with the friction wheel shaft 9, and the friction wheel gear 13 is meshed with the central large gear 14 to transmit power to the friction wheel 8.
Referring to fig. 8, the locking device comprises a pair of locking clamping blocks 17 and a pair of tension springs 34, wherein the bottoms of the locking clamping blocks are provided with regular hexagonal grooves, and the outer sides of the locking clamping blocks are provided with annular grooves 18 in the circumferential direction, so that the nylon ropes cannot be separated during locking; the two opposite positions on the outer side are provided with a first boss 21, and the side surface of the first boss 21 is provided with a second through hole 20 for fixing one end of a tension spring 34.
The working principle of the invention is as follows:
in a locking state: the four triangular film sails 3 are stored in the sail storage bin 1 in a folded state, and two feet of each film sail 3 are fixedly connected to the extending section of the strip-shaped elastic mast 7 through a tension spring or a nylon rope; the fixed end of the belt-shaped elastic mast 7 is clockwise wound on the mast central shaft 6, and the belt-shaped elastic mast is tightly pressed by a pressing mechanism 12 so as to prevent the belt-shaped elastic mast from being 'burst' in the device when in a contraction state; two locking clamp blocks 17 of the locking device 16 are mutually pressed and attached by nylon ropes to form a regular hexagon groove, the mast central shaft 6 is locked, the belt-shaped elastic mast 7 is prevented from being accidentally unfolded due to the elastic potential energy stored in the belt-shaped elastic mast 7, and the tension spring 34 in the locking device 16 is in a tension state in the locking state.
In the unfolded state: the nylon ropes in the circumferential direction of the locking clamping blocks 17 are blown by the additional wire burning module in the locking device 16, the two locking clamping blocks 17 are mutually separated under the action of the tension springs 34 fixedly connected with the locking clamping blocks, the locking device 16 is unlocked, and the mast central shaft 6 can freely rotate; the motor rotates forwards under the control of an additional control module, and power is transmitted to the friction wheel 8 of the unfolding device 5 through the central large gear 14, the friction wheel gear 13 and the friction wheel gear shaft 9 in sequence; when the device is unfolded, the two friction wheels 8 of each pair rotate oppositely, the four strip-shaped elastic masts 7 extend outwards in the gaps between the friction wheels 8 of each pair, and the parts of the strip-shaped elastic masts 7 between the friction wheels 8 are deformed slightly, so that the friction wheels 8 can press the strip-shaped elastic masts 7, and the static friction between the friction wheels 8 and the strip-shaped elastic masts 7 is increased as much as possible; the extended section of the ribbon-like flexible mast 7 pulls the film sail 3 outward during deployment until the film sail 3 is fully deployed.
In conclusion, the braking sail derailing device applied to the cuboidal star has small volume and light weight, and meets the design requirements of cuboidal star miniaturization and light weight; a power source is added into the device, and the unfolding process is controllable, so that the unfolding reliability of the brake sail can be further improved; on the basis of ensuring the reliability of the device expansion, the area of the braking sail can be further enlarged, and the application range of the braking sail off-rail device is improved; the device adopts a modular design scheme, has simple structure and low processing cost, and is very suitable for the cube star with short task period; the expansion circuit and the modularized power supply can be expanded and added, the device independence is improved, and the reliability of the off-track system is guaranteed while other systems are not interfered.
Claims (10)
1. A braking sail derailing device applied to a standing satellite is characterized by comprising a sail storage device (4), a driving device (15), an unfolding device (5) and a locking device (16) which are sequentially arranged from top to bottom;
the sail storage device (4) stores the film sail (3);
the unfolding device (5) comprises four strip-shaped elastic masts (7) and a mast central shaft (6), the extension sections of the strip-shaped elastic masts (7) are connected with the film sail (3), and the fixed ends of the strip-shaped elastic masts (7) are wound on the mast central shaft (6); the four wound strip-shaped elastic masts (7) are unfolded so as to drive the film sail (3) connected with the masts to be unfolded;
the driving device (15) is used for driving the strip-shaped elastic mast (7) in the unfolding device (5) to unfold;
the locking device (16) is used for locking the unfolding device (5) in a locking state.
2. An off-track device according to claim 1, characterized in that the sail storage device (4) further comprises: the sail storage bins (1) are arranged on the side surfaces of the sail storage devices (4) and are in four trapezoidal groove shapes, and the film sail fixing blocks (2) are arranged on the side surfaces of the sail storage bins;
the film sail (3) is stored in the sail storage bin (1), and one corner of the film sail (3) is fixed on a central structure of the sail storage bin (1) through a film sail fixing block (2).
3. The derailment device according to claim 2, wherein the sail storage bin (1) and the membrane sail fixing block (2) are respectively provided with a triangular groove (39) and a triangular boss (38), so as to prevent the membrane sail (3) fixing part from being pulled out.
4. An off-track device according to claim 2, wherein the deployment device (5) further comprises an outer housing (23), an end cap (22), four hold-down mechanisms (12), four pairs of friction wheels (8) and four pairs of friction wheel axles (9);
the unfolding device (5) is of a centrosymmetric structure, four pairs of friction wheels (8) are fixedly connected to friction wheel shafts (9) and are positioned at the same positions of four corners of the unfolding device (5) through third bearing grooves (32) on an outer shell (23) and an end cover (22), and a gap of 1-2mm is reserved between each pair of friction wheels (8);
the mast central shaft (6) is positioned at the center of the unfolding device and can rotate around the center, and four pairs of threaded holes are uniformly distributed in the circumferential direction of the mast central shaft (6) and used for fixing the strip-shaped elastic mast (7);
the positioning center of the pressing mechanism (12) is arranged between every two pairs of friction wheels (8), can rotate around the positioning center and is used for pressing the strip-shaped elastic mast (7) so as to prevent the strip-shaped elastic mast (7) from being exploded in the device when in a contraction state;
the four strip-shaped elastic masts (7) are clockwise wound on the mast central shaft (6), and the end parts of the four strip-shaped elastic masts pass through the gap between each pair of friction wheels (8) when the four strip-shaped elastic masts are unfolded and extend outwards by means of power provided by the friction wheels (8).
5. The derailment device according to claim 4, wherein the hold-down mechanism (12) comprises a guide roller (11), a support plate (10) and a pair of torsion springs (35);
one side of the supporting plate (10) is provided with a guide roller mounting groove for mounting a guide roller, and the other side is provided with two torsion spring mounting grooves; through holes are formed in the two sides of the supporting plate and respectively penetrate through the guide roller connecting bolt and the positioning bolt of the supporting plate (10);
bearing groove assembling bearings are arranged on the upper side and the lower side of the guide roller (11); the torsion spring (35) is limited by the support plate (10) on one side and a device connecting bolt on the other side to provide pressing force transmitted by the pressing mechanism (12) to the strip-shaped elastic mast (7).
6. An off-track device according to claim 5, characterized in that the inner center of the outer housing (23) is provided with a second boss 25 for assembling a rolling bearing to position the mast central shaft (6) at the device center;
four pairs of bearing grooves are formed in the same positions of four corners of the bottom of the outer shell (23) and used for positioning the friction wheel shaft (9); the friction wheel shaft (9) penetrates out of the through hole in the first bearing groove (26);
grooves are formed in four side edges of the outer shell (23) and used for extending and unfolding the strip-shaped elastic mast (7);
bosses and bearing grooves are respectively arranged at the outer center and the four corners of the outer shell (23) to assemble a rolling bearing; and a countersunk hole (29) for positioning the pressing mechanism (12) is reserved between each two pairs of bearing grooves, and the four countersunk holes (29) are symmetrically distributed along the center.
7. The derailment device according to claim 2, wherein the end cover (22) is provided with a fourth bearing groove (40) and a mast central shaft extension hole (31) in sequence at the center for positioning and fixing the mast central shaft (6);
bearing holes are arranged at corresponding positions of four corners of the end cover (22), and a rolling bearing is assembled and used for positioning and fixing the friction wheel shaft;
8. derailment device according to claim 7, characterized in that the friction wheel axle (9) is a stepped axle, where the part of the cross-section that cooperates with the friction wheel (8) and the friction wheel gear (13) is D-shaped to transmit power.
9. Derailment device according to claim 8, wherein the drive means (15) comprises an electric motor, a central gearwheel (14) and a friction wheel gear (13);
the output shaft of the motor is a D-shaped shaft, and the D-shaped shaft is connected with the central large gear (14) through a D-shaped hole and transmits the power of the motor to the central large gear (14);
the friction wheel gear (13) is a small gear, a D-shaped through hole is formed in the center of the friction wheel gear and matched with the friction wheel shaft (9), and the friction wheel gear (13) is meshed with the central large gear (14) to transmit power to the friction wheel (8).
10. An off-track device according to claim 9, wherein the locking device comprises a pair of locking jaws (17) and a pair of tension springs (34);
one end of the tension spring (34) is connected with a first boss 21 with a through hole on the lower surface of the end cover (22), and the other end of the tension spring is connected with a boss with a first through hole (19) on the side surface of the locking clamping block (17);
the bottom of the locking clamping block (17) is provided with a regular hexagonal groove, the top of the mast central shaft (6) is provided with a regular hexagonal boss (33), and the regular hexagonal boss is matched with the regular hexagonal groove arranged at the bottom of the locking clamping block (17) and used for locking the mast central shaft (6);
an annular groove (18) is formed in the outer side of the locking clamping block (17) in the circumferential direction, and the locking clamping block (17) is locked through a nylon rope;
the nylon rope locking device is characterized by further comprising a wire burning module used for burning the nylon rope in the circumferential direction of the locking clamping blocks (17), at the moment, the two locking clamping blocks (17) are separated from each other under the action of the tension springs (34) fixedly connected with the locking clamping blocks, and the locking device (16) is unlocked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362316.0A CN111591471A (en) | 2020-04-30 | 2020-04-30 | Braking sail derailing device applied to standing satellite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362316.0A CN111591471A (en) | 2020-04-30 | 2020-04-30 | Braking sail derailing device applied to standing satellite |
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| CN202010362316.0A Pending CN111591471A (en) | 2020-04-30 | 2020-04-30 | Braking sail derailing device applied to standing satellite |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113401367A (en) * | 2021-06-28 | 2021-09-17 | 南京理工大学 | Expansion device of micro-nano satellite solar sail propulsion system |
| CN113525724A (en) * | 2021-07-05 | 2021-10-22 | 陕西智星空间科技有限公司 | Micro-nano satellite braking sail device |
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| CN113401367A (en) * | 2021-06-28 | 2021-09-17 | 南京理工大学 | Expansion device of micro-nano satellite solar sail propulsion system |
| CN113401367B (en) * | 2021-06-28 | 2022-03-18 | 南京理工大学 | Expansion device of micro-nano satellite solar sail propulsion system |
| CN113525724A (en) * | 2021-07-05 | 2021-10-22 | 陕西智星空间科技有限公司 | Micro-nano satellite braking sail device |
| CN113650813A (en) * | 2021-08-09 | 2021-11-16 | 南京理工大学 | Active driving type large-scale film unfolding sail device |
| CN114132528A (en) * | 2021-11-30 | 2022-03-04 | 北京卫星制造厂有限公司 | Flexible sail unfolding device |
| CN114132528B (en) * | 2021-11-30 | 2023-12-19 | 北京卫星制造厂有限公司 | Flexible sail unfolding device |
| CN117022685A (en) * | 2023-08-04 | 2023-11-10 | 南京理工大学 | Space debris passive driving resistance-increasing off-track device |
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