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    • 2. 发明申请
    • Actuator
    • 执行器
    • US20060012266A1
    • 2006-01-19
    • US10891690
    • 2004-07-15
    • Charles OakleyRick KerrGiulio Ricci-OttatiRussell BoschHermann BreitbachManfred Kolkman
    • Charles OakleyRick KerrGiulio Ricci-OttatiRussell BoschHermann BreitbachManfred Kolkman
    • H01L41/083
    • H01L41/053H01L41/0536H01L41/083
    • An actuator includes a piezoelectric stack within a housing that applies a compressive load to the stack. The housing may include a cylindrical tube closed at one end and may seal the stack against fluid pressure. The housing may be shorter than the length of the piezoelectric stack and may include resilient means for inducing elastic strain in the stack. The resilient means may include one or more slots extending around the circumference of the housing and/or a corrugated region of the housing to form a tension spring at a lower end of the housing. The tension spring may then serve to draw the stack into compression. The stack may include a plurality of layers of piezoelectric or piezoceramic material interspersed with a plurality of layers of electrically conductive material and connecting means for connecting the layers to a source of electrical power.
    • 致动器包括在壳体内的压电叠层,其向堆叠施加压缩载荷。 壳体可以包括在一端封闭的圆柱形管,并且可以将堆叠密封以抵抗流体压力。 壳体可以比压电堆叠的长度短,并且可以包括用于在堆叠中引起弹性应变的弹性装置。 弹性装置可以包括围绕壳体的圆周延伸的一个或多个狭槽和/或壳体的波纹区域,以在壳体的下端形成拉伸弹簧。 拉伸弹簧然后可以用于将叠层拉伸成压缩。 堆叠可以包括散布有多层导电材料的多个压电或压电陶瓷材料层,以及用于将层连接到电力源的连接装置。