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发明公开
CN105229314A 弹簧复位致动器 无效 - 撤回

弹簧复位致动器
摘要：
本发明的实施方式的方面涉及一种弹簧复位致动器，其包含：可通过加压流体在第一和第二位置之间移动以移动负载的第一活塞(125A、B)；包含第二活塞(135A、B)的安全系统，第二活塞(135A、B)可由加压流体移动以装备安全系统，并且当停止给3/2导阀供能时或者当加压流体的压力下降到低于安全压力阈值时，将第一活塞从第二位置复位到第一位置；以及用于提供加压流体的差分流体通道(170)，其被配置为使得第一活塞在运转移动负载时基本上保持与已装备的安全系统分离。
摘要（英）：

Aspects of embodiments of the invention relate to a spring-return actuator comprising a first piston (125A, B) movable between a first and a second position by pressurized fluid to move a load; a safety system comprising a second piston (135A, B) movable by the pressurized fluid to arm the safety system and which returns the first piston from the second position to the first position when deenergizing the 3/2 pilot valve or when the pressure of the pressurized fluid drops below a safety pressure threshold; and a differential fluid channel (170) for providing the pressurized fluid and configured so that, the first piston while working to move the load remains substantially disengaged from the safety system being armed.

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