Low impact unlocking device based on shape memory alloy spring, and application method thereof

A memory alloy spring and unlocking device technology, applied in the field of spacecraft mechanism, can solve the problems of inconsistent launch state and ground test state, large impact of pyrotechnic release device, etc., achieve high versatility and economy, release impact load small , the effect of reset operation is simple

Active Publication Date: 2013-08-21
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

[0005] In response to the above-mentioned needs, the purpose of the present invention is to design a lo

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  • Low impact unlocking device based on shape memory alloy spring, and application method thereof
  • Low impact unlocking device based on shape memory alloy spring, and application method thereof

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0032] The present invention is achieved through the following technical solutions. A low-impact unlocking device based on a shape memory alloy spring according to the present invention includes a split nut, a large piston spring, a push rod, a push rod spring, a large piston, and a small piston spring , small pistons, small balls, memory alloy springs, shells and other components. Through the heating device, the deformed shape memory alloy acts as an actuator, the small ball acts as an auxiliary ...

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Abstract

The invention discloses a low impact unlocking device based on a shape memory alloy spring and mainly applied to spacecraft. A main structure of the low impact unlocking device can be mounted an effective load to be unlocked and can be used with bolts to connect a spacecraft body with the load. When on-orbit unlocking is needed, the mechanism can be unlocked by heating the shape memory alloy spring of the low impact unlocking device, restraint between the bolts and nuts is unlocked by moving the mechanism, the bolts are separated from the nuts under the action of force, and accordingly two parts are unlocked. The low impact unlocking device has the advantages that such problems that an initiating explosive device widely on spacecraft models is high in impact and nonuniform in launching state and test state are solved; the device is reusable, lightweight, small and the like; and reliability, applicability and economy of the device are guaranteed.

Description

technical field [0001] The invention relates to a mechanism of a spacecraft, in particular to a low-impact unlocking device based on a shape memory alloy spring and its use. Background technique [0002] With the development of aerospace technology, modern spacecraft platforms are developing towards quietness and high precision. At the same time, many payloads on the star need to be connected and unlocked with satellite platforms after they are launched into orbit. High-precision sensitive satellites are due to their The payload equipment on board is a high-precision instrument and is sensitive to the impact force during release, so the requirement for low-impact release is put forward, which is difficult for traditional pyrotechnic release devices. In addition, due to the installed star The pyrotechnic product release device cannot be tested before launch, so its state may be inconsistent with the ground test state, which brings certain hidden dangers. [0003] In response...

Claims

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Application Information

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IPC IPC(8): B64G1/64
Inventor 杜三虎王智磊王萌薛景赛张涛张如变
Owner SHANGHAI SATELLITE ENG INST
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