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1. 发明申请

WO2009036572A1 DIRECTLY ACTUATED VALVE WITH A STRAIN-TYPE ACTUATOR AND A METHOD OF OPERATING SAME 审中-公开
标题翻译：具有应变型致动器的直接致动阀及其操作方法
公开(公告)号：WO2009036572A1
公开(公告)日：2009-03-26
申请号：PCT/CA2008/001659
申请日：2008-09-19
申请人： WESTPORT POWER INC. , MUMFORD, David , WELCH, Alan , TOUCHETTE, Alain , HEBBES, Mike , WING, Richard
发明人： MUMFORD, David , WELCH, Alan , TOUCHETTE, Alain , HEBBES, Mike , WING, Richard
IPC分类号： F16K31/72 , F02M51/06 , F16K31/02
CPC分类号： F16K31/004 , F02D41/20 , F02D41/2096 , F02D2041/2037 , F02M51/0603 , F02M61/10 , F02M61/168 , F02M2200/02 , F02M2200/304 , F02M2200/703
摘要： Disclosed is a method of operating a directly actuated valve that comprises a strain-type actuator to actuate a valve member to travel between a closed position and an open position, the method comprising transmitting displacements from the strain-type actuator to the valve member, maintaining a compressive stress on the actuator that is greater than a predetermined minimum stress by applying a pre-load compressive stress and limiting to less than predetermined limits at least one of: (a) acceleration and deceleration of the valve member when moving between open positions and the closed position; and (b) velocity of said valve member immediately before contacting the valve seat. One of the preferred techniques for limiting the velocity of the valve member while also reducing the amount of fluid that flows through the valve during the closing time, comprises changing the closing rate of the valve member so that the valve member travels most of the closing distance quickly during the beginning of a closing movement, and then slowing down the closing rate of the valve member in a second portion of the closing movement, so that the velocity of the valve member is less than a predetermined limit immediately before contacting the valve seat.
摘要翻译：公开了一种操作直接致动阀的方法，其包括应变型致动器以致动阀构件在关闭位置和打开位置之间行进，所述方法包括将位移从应变型致动器传递到阀构件，保持所述致动器上的压缩应力大于预定的最小应力，通过施加预负荷压缩应力并且限制在小于预定限度以下至少之一中：（a）当在打开位置之间移动时所述阀构件的加速和减速;以及关闭位置; 和（b）在接触阀座之前所述阀构件的速度。用于限制阀构件的速度同时减少在关闭时间期间流过阀的流体的量的优选技术之一包括改变阀构件的关闭速率，使得阀构件行进大部分的闭合距离在关闭运动开始时快速地，然后在关闭运动的第二部分中减慢阀构件的关闭速度，使得阀构件的速度小于在接触阀座之前的预定极限。

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