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    • 50. 发明授权
    • Passively ambient temperature actuated fluid valve
    • 被动环境温度致动流体阀
    • US5613634A
    • 1997-03-25
    • US328188
    • 1994-10-24
    • Luciano VeronesiIan L. W. Wilson
    • Luciano VeronesiIan L. W. Wilson
    • G05D23/02
    • G05D23/026
    • A passively temperature actuated valve has a shape memory alloy (SMA) mechanism connected to a lever arm which engages the valve stem to actuate the valve against the biasing force of a valve stem biasing spring when the ambient temperature rises above the transition temperature of the SMA. The SMA mechanism can include an SMA rod, but preferably has a tube of shape memory alloy supported in couplings which allow ambient fluid to freely pass through the tube. A stack of Bellville springs concentrically mounted over the tube biases the tribe to the elongated condition when below the transition temperature. An optional latch latches the valve in the actuated position if it is required that the valve remain actuated when the ambient temperature falls below the transition temperature and the Bellville springs again elongate the SMA member.
    • 被动温度致动阀具有连接到杠杆臂的形状记忆合金(SMA)机构,其接合阀杆以克服阀杆偏置弹簧的偏置力来致动阀,当环境温度升高到高于SMA的转变温度 。 SMA机构可以包括SMA棒,但是优选地具有支撑在耦合中的形状记忆合金管,其允许环境流体自由地通过管。 同时安装在管上方的一堆贝尔维尔弹簧在部分转变温度以下时会将部落偏移到细长状态。 如果要求当环境温度低于转换温度时阀门保持启动,而Bellville弹簧再次拉伸SMA部件,则可选的闩锁将阀门锁定在致动位置。