New device avoids damage due to excessive axial forces
Torque limiters protecting rotating machines against overload are usually
positioned in the drive train, some distance from the point of overload.
This type of limiter is not normally suitable for linear motion machines,
and limiting axial movement is not always possible. However, a new
component from Mayr - the EAS axial overload element - when built into a
connecting rod or similar, can be pre-set to limit the axial force in
either tension or compression.
In the event of an overload occurring and the pre-set axial force being
exceeded, the EAS disengages, its central rod moves relative to the outer
sleeve and an integral proximity sensor signals the drive to 'off'. Once
the overload condition has passed, the EAS is re-engaged automatically by
moving the central rod to its original position. It can be positioned
directly at the possible trouble spot to provide optimum protection.
Eight basic sizes cover the range 50 to 300,000N axial disengage force.
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