Overload elements protect axial actuation

The Mayr EAS axial overload element, when built into a connecting rod or similar, can be preset to limit the axial force, in either tension or compression.

Torque limiters to protect rotating machines and equipment against overload are usually positioned in the drive train someway from where the actual overload occurs.

In machines with linear motion, rotating type torque limiters are not normally suitable and limiting axial movement is not always possible.

The Mayr EAS axial overload element, when built into a connecting rod or similar, can be preset to limit the axial force, in either tension or compression.

In the event of an overload occurring and the preset axial force being exceeded, the EAS element will disengage, the central rod will move relative to the outer sleeve and the integral proximity sensor will signal the drive off.

Re-engagement of the EAS axial overload element once the overload has passed, is automatic by moving the central rod to its original position.

The EAS axial overload element can be positioned directly at the possible trouble spot and therefore will offer optimum overload protection.

In the case of crank mechanisms, the forces in a connecting rod vary and with the higher forces occurring at the top or bottom dead centre of the crank a normal torque limiting clutch may not be suitable.

Using the EAS axial unit guarantees that the axial force acting onto the connecting rod - independent of the crank position - does not exceed a preset value.

EAS axial elements are available in eight basic sizes covering the range 50-300,000N axial disengage force.

They can be supplied complete with extension pieces to suit customer specific connecting rod lengths and an integral proximity sensor can be fitted to signal an overload condition.

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