CN100520668C

CN100520668C - Patulous self-furling memory alloy lock-release device

Info

Publication number: CN100520668C
Application number: CNB200810056504XA
Authority: CN
Inventors: 包锦忠; 姚芳; 常新亚; 冷允激
Original assignee: Aerospace Dongfanghong Satellite Co Ltd
Current assignee: Aerospace Dongfanghong Satellite Co Ltd
Priority date: 2008-01-21
Filing date: 2008-01-21
Publication date: 2009-07-29
Anticipated expiration: 2028-01-21
Also published as: CN101224795A

Abstract

The invention discloses a spreading type self-furling memory alloy unlocking device used for a spacecraft, which consists of an arch locking wire subassembly (1), a stop (2), a lock body (3), a compression spring (4), a lifting arm (8), a connecting rod (9) and a releasing device; the arch bottom of the camber locking wire subassembly (1) is fixed at the front end of the lock body (3), the stop (2) is arranged on the arch locking wire subassembly (1), the connecting rod (9) inserts into an inner cavity at the front end of the lock body (3) after being connected with the stop (2); the connecting rod (9) passes through the rear end of the lock body (3) and is connected with the lifting arm (8), the lifting arm (8) tightly presses the compression spring (4) in the lock body (3); the releasing device is clamped at the rear end of the lock body (3) by a connecting part fixed on the lifting arm (8). The memory alloy locking wire provided by the invention adopts an arch spread mode, thus reducing the diameter and the length of the alloy wire, also the size is small and the unlocking time is short; furthermore, the unlocking purpose can be realized after stretching at any side, the reliability is high and the invention can be used for various spacecrafts.

Description

Patulous self-furling memory alloy lock-release device

Technical field

The present invention relates to the memorial alloy unlocking device that a kind of spacecraft is used, draw the memorial alloy unlocking device certainly in especially for the small sheet open form that the satellite and the rocket, star separate.

Background technology

The space releasing mechanism is that each spacecraft institute is requisite.Firer's cutter that spacecraft is commonly used or blasting bolt etc. can releases in tens of milliseconds, but complex structure, size are big, and shock load 4000g is many, and the static explosion hazard is big, and use has certain limitation.For those occasions that need two or more objects not separated in accurate moment, as the various development mechanisms of spacecraft and some other fine motion element, priming system is not suitable release power source just.

The Ti-Ni marmem has peculiar memory performance and super-elasticity, and its martensitic state is softer, and cold deformation at an easy rate makes it become austenite after the heating, can return to the preceding shape of original cold deformation, and produce restoring force in this course.People utilize this characteristic of memorial alloy to come the space release mechanism is done work.Country such as the U.S., Russia has promptly used the release power source of memorial alloy as satellite, airship, space shuttle and space station in fields such as Aero-Space since last world the eighties.

U.S. Pat Patent 5192147 spacecraft memorial alloy releases use two linear memory alloy wires, and an end is fixed, other end freedom, and sleeve is being overlapped at the silk middle part, and release member is stuck on the sleeve.When the temperature distortion of alloy silk, curvature diminishes, and two flight leads are from widening, and distance widens between the cylindrical sleeve, and releaser is thrown off naturally.The shortcoming of this mechanism is that card is put part and releasing mechanism is connected in one, discharges simultaneously, and mechanism is burdensome relatively, and the curved transition of silk is big, and the alloy silk is longer, and size is bigger.

" maintenance and the releasing mechanism " of Chinese patent CN1320093 with shape memory actuator, adopt long alloy silk to be coiled in the outer end of mechanism, when memory alloy wire adds thermal deformation, from axial dimidiation, the former connected object of the screw thread end that is under the tension force just is released with a female cylinder.The memory alloy wire of this mechanism is longer, and circular coiling causes that easily heating is inhomogeneous and amount of localized heat is too high, necessarily requires d/d object that a tension force is axially being arranged, and the connection of thread mechanism is still one of pattern of this mechanism's catastrophic failure.

The existing memorial alloy release mode of utilizing mainly is out of shape by the memorial alloy axial shrinkage and is come release, owing to require stroke big, axial deformation is big, thus memory alloy wire must be more slightly, longer, thereby, the release size is strengthened, heat time heating time is longer.Simultaneously,, to keep certain interval between alloy silk and the heater block on it, therefore, be increased heat time heating time to guarantee relative motion owing to need the memorial alloy axial shrinkage.Development along with large satellite, moonlet, especially microsatellite, the appearance of star received, satellite weight is in 100kg, 50kg, 10kg level, original release size is too big, weight lays particular stress on, and uses heat time heating time oversize, and the limitation of use is big, when star separates, directly influence the precision of entering the orbit of microsatellite.

Summary of the invention

Technology of the present invention is dealt with problems and is: overcome the deficiency that existing memorial alloy release size is big, weight is bigger, the memorial alloy unlocking device that a kind of size is little, in light weight, the release time is short is provided.

Technical solution of the present invention is: Patulous self-furling memory alloy lock-release device comprises arc lock silk assembly, block, lock body, stage clip, connecting rod, rises arm and releasing means; Arc lock silk assembly middle part is fixed on the front end of lock body, and the block frame is on arc lock silk assembly, and connecting rod inserts lock body front end inner chamber after connecting block, and block can slide in lock body front end inner chamber after breaking away from arc lock silk assembly; Connecting rod passes the lock body rear end and rises arm and be connected, and rises arm rest in the lock body rear end, pushes down the stage clip that is positioned at lock body; Releasing means is fixed on the web member that rises on the arm by it and is stuck in the lock body rear end.

Described arc lock silk assembly is made up of arc lock silk, lead, insulation cover and heating wire coil; Arc lock silk respectively twines one group of heating wire coil on two limits, and the heating wire coil connects lead, and heating wire coil overcoat has the insulation cover.

Described arc lock silk assembly is a U-shaped.

The maximum physical dimension of described arc lock silk assembly is less than 25mm, and the maximum physical dimension of memorial alloy unlocking device is less than 80mm.

The present invention's advantage compared with prior art:

1, unlocking device structure of the present invention, the dress arc opened distortion in the axial deformation of memorial alloy changed into, do not need to adopt the big memory alloy wire of size to produce big axial force, overcome the friction force between arc lock silk assembly and block and the lock body when only needing to launch, therefore can reduce diameter of alloy wire and length, size is little, and is in light weight, realized miniaturization, the lightness of product better.

2, any side of arc memorial alloy lock silk assembly is opened and can be made block disengagement, realization release, can replace two rectilinearity memory alloy elements, is Redundancy Design, the reliability height.

When 3, launching owing to arc memorial alloy lock silk assembly, do not need relative motion between alloy silk and the heater strip, therefore heating wire of the present invention can directly be fastened on memory alloy wire, the outer tube insulation is heat insulation again, after the energising of memorial alloy lock silk assembly, open rapidly, the release time shortens greatly.

Description of drawings

Fig. 1 is the synoptic diagram before the Patulous self-furling memory alloy lock-release device release of the present invention;

Fig. 2 is the synoptic diagram after the Patulous self-furling memory alloy lock-release device release of the present invention:

Fig. 3 is the scheme of installation of lock silk assembly and block;

Fig. 4 is the synoptic diagram of lock silk assembly and block after the release.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, Patulous self-furling memory alloy lock-release device by arc lock silk assembly 1, block 2, lock body 3, a stage clip 4, rise arm 8, connecting rod 9 and releasing means and form; The arc middle part of arc lock silk assembly 1 is fixed on the front end of

lock body

3, and 2 of blocks are on arc lock silk assembly 1, and connecting rod 9 connects blocks 2 backs and inserts lock bodies 3 front end inner chambers; Connecting rod 9 passes lock body 3 rear ends and rises arm 8 and be connected, and fixing by nut 10, makes to rise arm 8 and lean against lock body 3 rear ends, pushes down the stage clip 4 that is positioned at lock body 3; Releasing means is positioned at lock body 3 rear end.

Releasing means is made up of stay cord 5, end latch closure 6 and band cross bar 7; Stay cord 5 one ends connect the satellite tripping device that needs release, and the other end is connected on the end latch closure 6 that inserts lock body 3 rear ends; Be fixed on the band cross bar 7 that rises on the arm 8 and insert in the end latch closure 6, end latch closure 6 is stuck in the lock body 3.

As shown in Figure 3, Figure 4, arc lock silk assembly 1 is made up of arc lock silk 11, lead 12, insulation cover 13 and heating wire coil 14; Respectively twine one group of heating wire coil 14 on two limits of arc lock silk 11, heating wire coil 14 connects lead 12, the heating wire coil 14 outer insulation covers 13 that are with.

Arc lock silk 11 in the present embodiment is U-shaped lock silk.The maximum physical dimension of arc lock silk group 1 is 25mm, and the memorial alloy unlocking device is of a size of Φ 36 * 60mm.

During release, open after the 1 energising heating of memorial alloy lock silk assembly, break away from block 2, connecting rod 9 under the promotion of stage clip 4 to outer displacement, block 2 slides in the front end inner chamber slideway of lock body 3, rise arm 8 drive band cross bars 7 and deviate from lock body 3 and end latch closure 6, end latch closure 6 leaves lock body under the pulling force of stay cord 5, thereby finishes the release work of separating mechanism.

Claims

1, Patulous self-furling memory alloy lock-release device is characterized in that: by arc lock silk assembly (1), block (2), lock body (3), a stage clip (4), rise arm (8), connecting rod (9) and releasing means and form; Described arc lock silk assembly (1) is made up of arc lock silk (11), lead (12), insulation cover (13) and heating wire coil (14); Respectively twine one group of heating wire coil (14) on two limits of arc lock silk (11), heating wire coil (14) connects lead (12), the outer insulation cover (13) that is with of heating wire coil (14); The arc middle part of arc lock silk assembly (1) is fixed on the front end of lock body (3), and block (2) frame is on arc lock silk assembly (1), and connecting rod (9) connects block (2) back and inserts lock body (3) front end inner chamber; Block (2) can slide in lock body (3) front end inner chamber after breaking away from arc lock silk assembly (1); Connecting rod (9) passes lock body (3) rear end and rises arm (8) and be connected; Rise arm (8) and lean against lock body (3) rear end, push down the stage clip (4) that is positioned at lock body (3); Releasing means is fixed on the link that rises on the arm (8) by it and is stuck in lock body (3) rear end.

2, according to the Patulous self-furling memory alloy lock-release device of claim 1, it is characterized in that: described arc lock silk assembly (1) is U-shaped.

3, according to the Patulous self-furling memory alloy lock-release device of claim 1 or 2, it is characterized in that: the maximum physical dimension of described arc lock silk assembly (1) is less than 25mm, and the maximum physical dimension of memorial alloy unlocking device is less than 80mm.

4, according to the Patulous self-furling memory alloy lock-release device of claim 1, it is characterized in that: described releasing means is made up of stay cord (5), end latch closure (6) and band cross bar (7); Stay cord (5) one ends are connected on the separating mechanism that needs to discharge, and the other end is connected on the end latch closure (6) that inserts lock body (3) rear end; Be fixed on the band cross bar (7) that rises on the arm (8) and insert in the end latch closure (6), end latch closure (6) is stuck in the lock body (3).