Construction machinery–
Industry

Steel sheet piles are used, for example, for the temporary securing of construction pits, for the installation of canals, locks and port facilities or as a remaining component for protection against ground or flood water. The most efficient method for installing the sheet pile planks is the vibratory driving method. In this process, the material to be driven is firmly connected to an oscillating gear housing via a clamping jaw and pressed vibratingly into the ground to reduce the driving resistance.

The vibration load on all gear components is enormous; it operates in a frequency range of approx. 30 to 45 Hz and with an amplitude of more than 10 mm. Under these conditions, Hense rotary actuators, which are installed here as rotating shafts, adjust the unbalances against each other and ensure a continuously variable adjustment of the unbalance. According to plan, the rotary actuators are exposed to accelerations of up to about 30 g. In construction site operation, impacts with multiple acceleration are also the order of the day, but the Hense rotary actuators also cope with them without damage.