关键词: 形状记忆合金, 平面涡卷弹簧, 驱动器, 结构设计

Abstract:

One kind of plane turbination torque output actuator based on Ni-Ti SMA was introduced herein. This device could achieve forward and reverse torque output corresponding to the high and low temperature state with the interaction of the single trip memory effect of NiTi alloy and the recovery spring. First the basic structure and action principle were declared and the design approach and its basic preparation technology of SMA acting part were discussed. Then the principle prototype was designed and manufactured. The input-output characteristic test was processed. Testing results show that, the device could continuously and stably output torques under the condition of temperature state from 10~60℃. The maximum stroke range is as 0~175°, and the maximum torque is 0.33N·m. The results verify the feasibility of the design and preparation process of this device.

Key words: shape memory alloy(SMA), flat spiral spring, actuator, structure design