A ring-shaped payload separation mechanism with redundancy of unlocking principles

Abstract

The application relates to a ring-shaped payload separation mechanism with unlocking principle redundancy, which comprises a belt body, a motor-driven unlocking assembly and a pyrotechnic point connection separation device; when installed, the flanges of a payload lower end frame and a payload support upper end frame are embedded into V-shaped grooves in the belt body, protruding connection structures are arranged on the outer sides of the end heads of the belt body, the connection structures are connected in series by the motor-driven unlocking assembly and the pyrotechnic point connection separation device, the belt body is stretched and the end heads of the belt body are gathered, the belt body is tightened and connected with the payload lower end frame and the payload support upper end frame; the motor-driven unlocking assembly is unlocked by adopting a motor-driven mechanical position releasing principle; the pyrotechnic point connection separation device is unlocked by adopting a pyrotechnic point explosion structure destruction principle; when any one of the motor-driven unlocking assembly and the pyrotechnic point connection separation device is normally unlocked, the belt body is contracted along the ring direction and expanded along the radial direction, and the separation of the payload lower end frame and the payload support upper end frame is completed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of separation mechanism, and relates to a ring-shaped payload separation mechanism with redundant unlocking principles. BACKGROUND

[0002] The payload separation mechanism is the last separation link of the launch vehicle system and is a key single machine affecting the success of the launch mission. Domestic launch vehicles all adopt flexible band separation devices, such as the patents 201210266549.6 and 201310240928.2 of Shanghai Aerospace System Engineering Institute. However, the thin steel band and V-shaped block are used to connect the upper and lower end frames, which is prone to large elastic deformation when bearing, and the bearing capacity and connection stiffness are low, which cannot meet the requirements of the mass and interface size of the new generation of large payloads. Foreign launch vehicles currently use rigid band separation mechanisms to complete payload separation, and domestic patents also involve related technologies, such as the patents 201711181989.0 and 201910113314.5 of Beijing Aerospace System Engineering Institute. The above rigid bands adopt the structure form of a whole ring with a single opening, and one unlocking assembly is used to connect the band end, and the unlocking link of the band has no redundant design. The flat plate-shaped capture sheet is used to constrain the axial displacement of the band, and the constraint capture ability of the radial rebound movement of the band is poor. There is no effective monitoring means for the pre-tightening force loading state of the band after installation. SUMMARY

[0003] The application solves the technical problem of overcoming the deficiencies of the prior art and providing a ring-shaped separation mechanism with redundant unlocking principles to improve the unlocking reliability and safety of the separation device.

[0004] The technical solution of the application is a ring-shaped payload separation mechanism with redundant unlocking principles, which comprises a band body, a motor-driven unlocking assembly and a pyrotechnic point-type connection separation device.

[0005] The band body is a single-opening circular-arc elastic structural member, and in the natural state, the diameter of the circular arc of the band body is greater than that of the lower end frame of the payload and the upper end frame of the payload support. The inner side of the circular-arc elastic structural member facing the center is designed with a V-shaped groove. During installation, the flanges of the lower end frame of the payload and the upper end frame of the payload support are embedded in the V-shaped groove of the band body, and the outer side of the end of the band body is provided with a protruding connecting structure. The connecting structure is connected in series by the motor-driven unlocking assembly and the pyrotechnic point-type connection separation device, the band body is stretched and the end of the band body is gathered, the band body is tightened and connected to the lower end frame of the payload and the upper end frame of the payload support.

[0006] The motor-driven unlocking assembly adopts a principle of motor-driven unlocking to release the mechanical limiting; the pyrotechnic point-type connecting and separating device adopts a principle of pyrotechnic point explosion structure destruction to release the unlocking; either of the motor-driven unlocking assembly and the pyrotechnic point-type connecting and separating device normally releases the unlocking, the belt body is contracted along the circumferential direction and expanded along the radial direction, so as to separate the lower end frame of the payload and the upper end frame of the payload support.

[0007] Preferably, the belt body end head is integrally formed with the connecting structure.

[0008] Preferably, the pyrotechnic point-type connecting and separating device is two.

[0009] The motor-driven unlocking assembly is respectively connected with one pyrotechnic point-type connecting and separating device through threads at two ends, the other ends of the two pyrotechnic point-type connecting and separating devices are respectively connected with the connecting structure of the belt body end head, and the separating surface of the pyrotechnic point-type connecting and separating device is between the motor-driven unlocking assembly and the connecting structure of the belt body end head; either of the two pyrotechnic point-type connecting and separating devices can realize the separation of the lower end frame of the payload and the upper end frame of the payload support.

[0010] Preferably, the motor-driven unlocking assembly comprises an intermediate locking device, a first screw rod and a second screw rod; the first screw rod and the second screw rod are respectively located at two sides of the intermediate locking device and are connected with the intermediate locking device through transmission threads; the intermediate locking device adopts a principle of motor-driven unlocking to release the mechanical limiting, so as to realize the simultaneous unlocking and separation of the first screw rod and the second screw rod.

[0011] Preferably, the intermediate locking device is connected to the upper end frame of the payload support through a first fixed shell, a second fixed shell, a support cross bar, a limiting nut and an unlocking support, and moves with the upper end frame of the payload support after separation.

[0012] The first fixed shell clamps and fixes the intermediate locking device from two sides by passing through the first screw rod and the second fixed shell passing through the second screw rod, and is connected and clamped by fasteners; the first fixed shell extends a lug with a through hole in a direction perpendicular to the axis of the first screw rod, and the second fixed shell extends a lug with a through hole in a direction perpendicular to the axis of the second screw rod.

[0013] The unlocking support is a U-shaped support, comprising a common beam and two legs connected to the common beam; the common beam of the U-shaped support is installed on the upper end frame of the payload support, and long circular holes are arranged on the first leg and the second leg of the U-shaped support along the radial direction of the belt body; one end of the two support cross bars is provided with a nut, and the other end passes through the long circular holes of the first leg of the unlocking support, the lug of the first fixed shell, the lug of the second fixed shell and the long circular hole of the first leg of the unlocking support in sequence to install the limiting nut;

[0014] After the intermediate locking device releases the constraint on the first screw rod and the second screw rod, the belt body is contracted along the circumferential direction and is expanded along the radial direction under the action of the pre-tightening force and the elastic deformation, the intermediate locking device and the cross bar of the support move along the long circular hole of the unlocking support with the end head of the belt body, the first screw rod and the second screw rod are pulled out of the intermediate locking device, and the motor drives the unlocking assembly to be unlocked.

[0015] Preferably, a through hole is arranged on the end head connecting structure of the belt body, the through hole is designed as a tapered hole near the opening side of the belt body, and the other side is designed as a ball socket.

[0016] The pyrotechnic point type connecting and separating device penetrates through the end head connecting structure of the belt body, one end of the pyrotechnic point type connecting and separating device is provided with a tapered limiting flange matched with the tapered hole of the connecting structure for constraint, and the other end of the pyrotechnic point type connecting and separating device is connected with the loading nut after being sleeved with a ball pad.

[0017] The ring-shaped payload separation mechanism with the redundant unlocking principle described above further comprises a load sensor.

[0018] The load sensor is installed on the pyrotechnic point type connecting and separating device, and is specifically installed between the ball pad and the loading nut, and is used for measuring the axial load of the pyrotechnic point type connecting and separating device.

[0019] Preferably, the ring-shaped payload separation mechanism with the redundant unlocking principle described above further comprises a capture assembly; N capture assemblies are uniformly distributed around the belt body along the circumferential direction, and jointly constrain the axial and radial dynamic envelopes of the belt body after separation, and N is greater than or equal to 3.

[0020] Preferably, the capture assembly comprises a capture support, a capture spring piece and a capture pressing plate.

[0021] The capture support is fixedly installed on the upper end frame of the payload support, and the capture pressing plate installs the root of the capture spring piece on the capture support through fasteners.

[0022] The end of the capture spring piece and the upper end surface of the belt body are provided with mutually matched hook structures, the hook structure of the capture spring piece is pressed on the upper end surface of the belt body during installation, the upper end surface of the belt body is constrained by the capture spring piece, when the belt body separates, the belt body moves away from the lower end frame of the payload support along the axial direction, and expands outward along the radial direction, the hook structure of the end of the capture spring piece is connected with the hook structure of the upper end surface of the belt body; after the belt body collides with the capture support, the belt body rebounds and moves along the radial direction to the center, the hook structure of the end of the capture spring piece and the hook structure of the upper end surface of the belt body mutually restrict each other, constrain the rebound movement of the belt body, and ensure that the belt body does not accidentally collide with the lower end frame of the payload.

[0023] Preferably, the upper end surface of the belt body protrudes from the end head connecting structure by a distance.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] (1), the unlocking principle of the application is that the motor-driven unlocking assembly and the pyrotechnic point connection and separation device are connected in series at the end of the belt, and the unlocking principles are respectively that the motor-driven unlocking is achieved by releasing the mechanical limit and the unlocking is achieved by the structure damage of the pyrotechnic point, and the belt can be unlocked and separated when any one of the two works normally, and the unlocking reliability of the belt can be improved through the redundancy of the unlocking principle. At the same time, any one of the two pyrotechnic point connection and separation devices can work to achieve unlocking, the motor-driven unlocking assembly moves outward along the long circular hole of the unlocking support, and the belt separation is achieved, further improving the fault tolerance and separation reliability of the separation mechanism.

[0026] (2), the capture spring in the capture assembly has a large elastic deformation capacity to avoid affecting the outward expansion movement of the belt during separation, but the capture spring root is easy to collide with the outward expansion of the belt, causing the capture spring to deform and lose the capture function. The capture spring root is provided with a capture pressing plate to ensure the structural strength and rigidity of the capture spring root and avoid plastic deformation.

[0027] (3), during the separation of the belt, the radial outward expansion is limited by the capture support, and then rebounds inward, which may collide with the upper and lower end frames again, affecting the separation posture and separation safety. The hook structure matched with each other is designed on the upper end surface of the belt and the end of the capture spring, which can constrain the radial inward rebound movement of the belt and ensure the dynamic envelope of the belt.

[0028] (4), the load sensor is connected in series on the pyrotechnic point connection and separation device at the end of the belt, so that the real-time monitoring of the pre-tightening force loading state after the belt is installed and the pre-tightening force change state during the flight of the rocket is realized. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the ring-shaped payload separation mechanism with unlocking principle redundancy of the embodiment of the application.

[0030] Figure 2 It is a connection diagram of the separation mechanism and the end frame of the embodiment of the application.

[0031] Figure 3 It is an installation diagram of the belt body end of the embodiment of the application.

[0032] Figure 4 It is an installation diagram of the motor-driven unlocking assembly and the pyrotechnic point connection and separation device of the embodiment of the application.

[0033] Figure 5 It is a belt separation state diagram when the motor-driven unlocking assembly of the embodiment of the application works.

[0034] Figure 6The figure shows a schematic diagram of the separation state of the bandage when the two pyrotechnic point-type connection and separation devices of the embodiment of the present application are working.

[0035] Figure 7 The figure shows a schematic diagram of the separation state of the bandage when the one pyrotechnic point-type connection and separation device of the embodiment of the present application is working.

[0036] Figure 8 The figure shows a schematic diagram of the capture assembly of the embodiment of the present application. DETAILED DESCRIPTION

[0037] The present application is further described below in conjunction with embodiments.

[0038] Figure 1 The figure shows a schematic diagram of the ring-shaped payload separation mechanism of the embodiment of the present application with redundant unlocking principle. The separation mechanism comprises a band body 100, a motor-driven unlocking assembly 200, a pyrotechnic point-type connection and separation device 300, a payload sensor 400, and a capture assembly 500.

[0039] The motor-driven unlocking assembly 200 adopts the principle of motor-driven release of mechanical limiting to achieve unlocking; the pyrotechnic point-type connection and separation device 300 adopts the principle of structure destruction by pyrotechnic point explosion to achieve unlocking.

[0040] Figure 2 The figure shows a schematic diagram (cross-sectional view) of the connection of the separation mechanism and the end frame. The band body 100 is a single-opening circular-arc-shaped elastic structural member. In the natural state, the diameter of the circular arc of the band body 100 is greater than the diameter of the lower end frame of the payload 600 and the upper end frame of the payload support 700, and the inner side of the circular-arc-shaped elastic structural member facing the center is designed with a V-shaped groove; when installed, the flanges of the lower end frame of the payload 600 and the upper end frame of the payload support 700 are embedded in the V-shaped groove of the band body, and the end head of the band body 100 is provided with a protruding connection structure. The connection structure is connected in series by the motor-driven unlocking assembly 200 and the pyrotechnic point-type connection and separation device 300. The band body is stretched and the end head of the band body 100 is gathered. The band body 100 tightly clamps and connects the lower end frame of the payload 600 and the upper end frame of the payload support 700, thereby realizing connection and bearing.

[0041] Either the motor-driven unlocking assembly 200 or the pyrotechnic point-type connection and separation device 300 normally unlocks, and the band body 100 shrinks along the ring direction and expands along the radial direction, thereby completing the separation of the lower end frame of the payload 600 and the upper end frame of the payload support 700.

[0042] The upper end surface of the band body 100 is designed with a hook structure, which cooperates with the capture spring 502 of the capture assembly 500 to realize the radial capture function of the band body 100.

[0043] Figure 3The installation schematic diagram of the belt end is shown. The belt 100 end is designed with a connecting structure, a through hole is designed along the belt ring direction, and the belt 100 end is integrally formed with the connecting structure. The end surface of the belt 100 opening is extended by a distance beyond the end connecting structure, so that a V-shaped groove is extended outside the connecting structure, which can increase the connecting area of the belt and the end frame, improve the bearing capacity of the belt, and avoid interference with the unlocking assembly.

[0044] The two pyrotechnic point connection and separation devices 300 are installed on the central part of the belt 100 end, and one pyrotechnic point connection and separation device 300 is installed on each side. The other end of the two pyrotechnic point connection and separation devices is connected with the connecting structure of the belt end, and the separation surface of the pyrotechnic point connection and separation device is between the motor-driven unlocking assembly 200 and the connecting structure of the belt end. Any one of the two pyrotechnic point connection and separation devices can realize the separation of the lower end frame 600 of the payload and the upper end frame 700 of the payload support.

[0045] Figure 4 The installation schematic diagram of the motor-driven unlocking assembly and the pyrotechnic point connection and separation device is shown. The motor-driven unlocking assembly 200 includes an intermediate locking device 201, a first screw rod 202, and a second screw rod 203.

[0046] The first screw rod 202 and the second screw rod 203 are respectively located on the two sides of the intermediate locking device 201 and are connected with the intermediate locking device 201 through a transmission thread. The intermediate locking device 201 adopts the principle of motor-driven unlocking and mechanical position release to realize the simultaneous unlocking and separation of the first screw rod 202 and the second screw rod 203.

[0047] The intermediate locking device 201 is connected to the upper end frame 700 of the payload support through a first fixed shell 204, a second fixed shell 205, a support cross rod 206, a limiting nut 207, and an unlocking support 208, and moves with the upper end frame 700 of the payload support after separation;

[0048] The first fixed shell 204 clamps the intermediate locking device 201 from both sides by penetrating the first screw rod 202 and the second fixed shell 205 penetrating the second screw rod 203, and is clamped and fixed through fasteners. The first fixed shell 204 is perpendicular to the axis direction of the first screw rod 202, and the second fixed shell 205 is perpendicular to the axis direction of the second screw rod 203, and both extend a lug with a through hole;

[0049] The unlocking support 208 is a U-shaped support including a common beam and two legs connected to the common beam. The common beam of the U-shaped support is installed on the upper end frame 700 of the payload support. The two legs of the U-shaped support, i.e., a first leg and a second leg, are provided with long circular holes in the radial direction along the belt body. The two support cross bars 206 are provided with nuts at one end and are sequentially installed through the long circular holes of the first leg of the unlocking support 208, the ears of the first fixed shell 204, the ears of the second fixed shell 205, and the long circular holes of the first leg of the unlocking support 208, and are installed with the limiting nuts 207. The through holes in the ears of the first fixed shell and the second fixed shell are slightly larger in diameter than the diameter of the support cross bars 206, so that the position of the intermediate locking device 201 can be adjusted appropriately when the belt is installed.

[0050] After the intermediate locking device 201 releases the constraint on the first screw rod 202 and the second screw rod 203, the belt body 100 is contracted in the circumferential direction and is expanded in the radial direction under the action of the pre-tightening force and the elastic deformation. The intermediate locking device 201 and the support cross bars 206 move along the long circular holes of the unlocking support 208 with the end of the belt body 100. The first screw rod 202 and the second screw rod 203 are pulled out of the intermediate locking device 201, and the motor-driven unlocking assembly 200 is unlocked.

[0051] The first screw rod 202 and the second screw rod 203 of the motor-driven unlocking assembly 200 are respectively connected to a pyrotechnic point connection and separation device 300 through threads.

[0052] The end connection structure of the belt body 100 is provided with a through hole. The through hole is designed as a tapered hole near the opening side of the belt body and is designed as a ball socket on the other side.

[0053] The pyrotechnic point connection and separation device 300 passes through the through hole of the end connection structure of the belt body 100 and is sequentially installed with a ball pad 209, a load sensor 400, and a loading nut 210.

[0054] The pyrotechnic point connection and separation device 300 passes through the end connection structure of the belt body 100 and is provided with a tapered limiting flange at one end. The tapered limiting flange is matched and constrained with the tapered hole of the connection structure.

[0055] After the other end of the pyrotechnic point connection and separation device 300 is sleeved with the ball pad 209, the ball pad 209 is connected with the loading nut 210. The ball pad 209 is matched with the ball socket of the connection structure, so as to reduce the bending moment load that the pyrotechnic point connection and separation device 300 needs to bear. At the same time, a certain degree of rotational freedom is provided when the belt is separated, so as to ensure that the first screw rod 202 and the second screw rod 203 of the motor-driven unlocking assembly 200 can be pulled out of the intermediate locking device 201.

[0056] The load sensor 400 is installed on the pyrotechnic point connection separation device 300, and specifically between the ball pad 209 and the loading nut 210, for measuring the axial load of the pyrotechnic point connection separation device 300, which is used to represent the pre-tightening force state on the belt body 100. During the flight of the launch vehicle, the pre-tightening force on the belt body 100 may change due to the influence of thermal and vibration environments, thereby affecting the load-bearing performance of the separation mechanism. The load sensor 400 can monitor the pre-tightening force state on the belt body 100 in real time, thereby judging the working state of the separation mechanism. The load sensor 400 is installed at the end of the belt body 100, which also avoids affecting the normal working process of the separation mechanism.

[0057] Figure 5 The separation state of the belt is shown when the motor-driven unlocking assembly is working. When the motor-driven unlocking assembly 200 is working normally, the intermediate locking device 201 releases the constraint on the first screw rod 202 and the second screw rod 203, the belt body 100 is contracted in the circumferential direction and expanded in the radial direction under the action of the pre-tightening force and elastic deformation, the end of the belt body 100 moves to the left and right sides and moves outward in the radial direction, the intermediate locking device 201 and the bracket cross rod 206 move outward along the long circular hole of the unlocking bracket 208 with the end of the belt body 100, the first screw rod 202 and the second screw rod 203 are pulled out of the intermediate locking device 201, and the unlocking and separation process is completed. After separation, the intermediate locking device 201 and the bracket cross rod 206 are constrained by the unlocking bracket 208, so as to avoid generating excess material. At this time, the pyrotechnic point connection separation device 300 does not work, and moves with the end of the belt body 100 under the constraint of the conical limiting flange, without generating excess material.

[0058] Figure 6 The separation state of the belt is shown when two pyrotechnic point connection separation devices are working. When the motor-driven unlocking assembly 200 does not work normally, the pyrotechnic point connection separation device 300 is detonated, both pyrotechnic point connection separation devices 300 work normally, the unlocking is completed by structural damage of the separation surface, the inner part 301 of the separation surface remains connected with the first screw rod 202 and the second screw rod 203, and is constrained on the intermediate locking device 201, and the outer part 302 of the separation surface moves to both sides under the action of the impact load, the conical limiting flange collides with the end of the belt body 100, so as to constrain the end of the belt body 100.

[0059] Figure 7The figure shows a schematic diagram of the separation state of the band when the pyrotechnic point connection separation device is working. When the motor-driven unlocking assembly 200 does not work normally, the pyrotechnic point connection separation device 300 is detonated. If only the left pyrotechnic point connection separation device 300 works normally, the separation surface of the pyrotechnic point connection separation device 300 is structurally damaged to complete unlocking. The outer part 302 of the separation surface moves with the left end of the band body 100. The motor-driven unlocking assembly 200 and the right pyrotechnic point connection separation device 300 that does not work can still complete separation with the right end of the band body 100.

[0060] Figure 8 The figure shows a schematic diagram of the capture assembly. The capture assembly 500 includes a capture bracket 501, a capture spring 502, and a capture pressing plate 503. N capture springs are evenly distributed around the band body 100 to jointly constrain the axial and radial dynamic envelopes of the band body 100 after separation. N is greater than or equal to 3.

[0061] The capture bracket 501 is installed on the upper end frame 700 of the payload bracket. The capture spring 502 is a thin strip with a large elastic deformation capacity. The end of the capture spring 502 is provided with a hook structure. The hook structure at the end of the capture spring 502 is pressed against the upper end surface of the band body 100. The upper end surface of the band body 100 is constrained by the capture spring 502.

[0062] The capture pressing plate 503 is installed on the capture bracket 501 by fasteners to cover a certain distance from the root of the capture spring 502. The capture pressing plate 503 is made of plate material and has high strength and rigidity. When the band is separated, the band body 100 expands outward in the radial direction under the action of the pre-tightening force and elastic deformation. The upper end surface of the band body 100 is constrained by the capture spring 502 and moves axially with the upper end frame 700 of the payload bracket, away from the lower end frame 600 of the payload. In the radial direction, the band body 100 expands outward, and the hook structure at the end of the capture spring 502 cooperates with the hook structure on the upper end surface of the band body 100. The band body 100 expands outward to collide with the inner wall of the capture bracket 501, which is constrained by the capture bracket 501, and reaches the maximum radial envelope. Considering the deviation of the band body 100 during movement, the band body 100 may collide with the root of the capture spring 502. At this time, the capture pressing plate 503 bears the collision load to ensure that the capture spring 502 does not plastically deform. After the band body 100 collides with the capture bracket 501, it rebounds and moves radially toward the center. The hook structure at the end of the capture spring 502 and the hook structure on the upper end surface of the band body 100 constrain each other to constrain the rebound movement of the band body 100, ensuring that the band body 100 does not collide with the lower end frame of the payload accidentally.

[0063] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A ring-shaped payload separation mechanism with unlock principle redundancy, characterized in that The utility model relates to a kind of elastic banding device, including belt body (100), motor drive unlocking assembly (200), pyrotechnic point type connection separation device (300), capture assembly (500); Belt body (100) is single opening circular arc elastic structural member, in natural state, the diameter of the circular arc of belt body (100) is greater than the diameter of effective payload lower end frame and effective payload support upper end frame (700);Circular arc elastic structural member is designed with V-shaped groove on the inner side facing the center of circle;When installation, the flange of effective payload lower end frame (600), effective payload support upper end frame (700) is embedded in the V-shaped groove of belt body, the outside of the end of belt body (100) is provided with protruding connection structure, connection structure is connected in series using motor drive unlocking assembly (200) and pyrotechnic point type connection separation device (300), stretch belt body and gather the end of belt body (100), belt body (100) is tightened and connects effective payload lower end frame (600), effective payload support upper end frame (700); Motor drive unlocking assembly (200) is unlocked using motor drive to remove mechanical limit principle; Pyrotechnic point type connection separation device (300) is unlocked using pyrotechnic point explosion structure destruction principle;Any one of motor drive unlocking assembly (200), pyrotechnic point type connection separation device (300) is unlocked normally, and belt body (100) is contracted along the ring direction and expands along the radial direction outward, to complete the separation of effective payload lower end frame (600), effective payload support upper end frame (700); The pyrotechnic point type connection separation device (300) is two; Motor drive unlocking assembly (200) is respectively connected with one pyrotechnic point type connection separation device (300) by screw thread at both ends, and the other end of two pyrotechnic point type connection separation devices is connected with the connection structure of the end of belt body, and the separation surface of pyrotechnic point type connection separation device is between motor drive unlocking assembly (200) and the connection structure of the end of belt body;Any one of two pyrotechnic point type connection separation devices can realize the separation of effective payload lower end frame (600), effective payload support upper end frame (700); The motor drive unlocking assembly (200) includes intermediate locking device (201), first screw rod (202), second screw rod (203);First screw rod (202), second screw rod (203) are respectively located on the two sides of intermediate locking device (201), and are connected with intermediate locking device (201) by transmission screw thread, and intermediate locking device (201) is unlocked and separated from first screw rod (202) and second screw rod (203) simultaneously using motor drive to remove mechanical limit principle; The intermediate locking device (201) is connected to effective payload support upper end frame (700) by first fixed shell (204), second fixed shell (205), support cross bar (206), limiting nut (207), unlocking support (208), and moves with effective payload support upper end frame (700) after separation. The first fixed shell (204) clamps the intermediate locking device (201) from both sides through the first screw rod (202), and the second fixed shell (205) clamps the intermediate locking device (201) from both sides through the second screw rod (203), and is clamped and fixed by fasteners; the first fixed shell (204) extends out a lug with a through hole in the direction perpendicular to the axis of the first screw rod (202), and the second fixed shell (205) extends out a lug with a through hole in the direction perpendicular to the axis of the second screw rod (203); The unlocking bracket (208) is a U-shaped bracket, including a common beam and two legs connected to the common beam, the common beam of the U-shaped bracket is installed on the upper end frame (700) of the payload bracket, and long circular holes are arranged on the two legs, i.e., the first leg and the second leg, of the U-shaped bracket in the radial direction of the belt body; the two bracket cross bars (206) are provided with a nut at one end and are provided with a limiting nut (207) at the other end, and the limiting nut (207) is installed in the long circular hole of the first leg of the unlocking bracket (208) through the lug of the first fixed shell (204), the lug of the second fixed shell (205) and the long circular hole of the first leg of the unlocking bracket (208) in sequence; After the intermediate locking device (201) releases the constraint on the first screw rod (202) and the second screw rod (203), the belt body (100) is contracted in the circumferential direction and is expanded in the radial direction under the action of the pre-tightening force and the elastic deformation, the intermediate locking device (201) and the bracket cross bar (206) move along the long circular hole of the unlocking bracket (208) with the end of the belt body (100), the first screw rod (202) and the second screw rod (203) are pulled out of the intermediate locking device (201), and the motor drives the unlocking assembly (200) to be unlocked; The end connection structure of the belt body (100) is provided with a through hole, the through hole is designed as a tapered hole close to the opening side of the belt body, and the other side is designed as a ball socket; The pyrotechnic point connection and separation device (300) passes through the end connection structure of the belt body (100), one end of the pyrotechnic point connection and separation device (300) is provided with a tapered limiting flange matched with the tapered hole of the connection structure for constraint, and the other end of the pyrotechnic point connection and separation device (300) is connected with a loading nut (210) after being sleeved with a ball pad (209), and the ball pad (209) is matched with the ball socket of the connection structure; N capture assemblies (500) are uniformly distributed around the belt body (100) in the circumferential direction, and jointly constrain the axial and radial dynamic envelopes of the belt body (100) after separation, and N is greater than or equal to 3; The capture assembly (500) includes a capture bracket (501), a capture spring piece (502) and a capture pressing plate (503); The capture bracket (501) is fixedly installed on the upper end frame (700) of the payload bracket, and the capture pressing plate (503) is installed on the capture bracket (501) by fasteners and the root of the capture spring piece (502). The end of the capture spring (502) and the upper end surface of the band (100) are provided with mutually matched hook structures, when installed, the hook structure of the capture spring (502) is pressed against the upper end surface of the band (100), the upper end surface of the band (100) is constrained by the capture spring (502), when the band is separated, the band (100) moves axially with the upper end frame (700) of the payload support and moves away from the lower end frame (600) of the payload, radially, the band expands outward, the hook structure of the end of the capture spring (502) is connected with the hook structure of the upper end surface of the band (100); after the band (100) collides with the capture bracket (501), it rebounds and moves to the center along the radial direction, the hook of the end of the capture spring (502) and the hook structure of the upper end surface of the band (100) restrict each other, constrain the rebound movement of the band (100), and ensure that the band (100) does not collide with the lower end frame (600) of the payload accidentally.

2. A ring-shaped payload separation mechanism of the unlock principle redundancy according to claim 1, characterized in that, The end of the band (100) is integrally formed with the connecting structure.

3. A ring-shaped payload separation mechanism of the unlock principle redundancy according to claim 1, characterized in that, Further comprising a load sensor (400); The load sensor (400) is installed on the pyrotechnic point connection and separation device (300), specifically between the ball pad (209) and the loading nut (210), for measuring the axial load of the pyrotechnic point connection and separation device (300).

4. A ring-shaped payload separation mechanism of the unlock principle redundancy according to claim 1, characterized in that, The end of the band (100) is integrally formed with the connecting structure.

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