EFFECT OF EXTERNAL FORCES
Hydraulic cylinders are extremely powerful, whose specific force generation is practically unique compared to other types of actuators. They provide their performance in the axial direction. This means that it is necessary to calculate the buckling strength and the basic system limits based on the pulling and pushing loads.
At the same time, interaction with the specific application almost always results in side forces. These should be eliminated as much as possible, or should be absorbed using separate (mechanical) construction; this is also required by DIN EN ISO 4413. For example, one good possibility is to use appropriate couplings, like those offered by AHP Merkle. These allow side motions without transferring them to the piston rod.
Alternatively, AHP Merkle has cylinder options that can absorb transverse forces and torques, such as the push units (BSE, ZSE) and core pull units (KZE).
Side forces or torques on hydraulic cylinders lead:
- damaged guides
- damaged piston rods
- damaged running surfaces
- destroyed seals
Use of a coupling to avoid side loads.