Single axis vibrator with frequency and amplitude control - uses four synchronised rotating off=centre weights and rugged control

摘要

The amplitude of vertical vibration is controlled by the relative angle, beta, between the offset weight pair (216, 220). Drive motors (270, 272) may be hydraulic or electric and are directly coupled to the rotating weights (214, 220). All components of the system rotate at the same angular velocity. The angle beta is controlled by the torque of one of three synchronised motors (244). USE/ADVANTAGE - Controllability. Rugged design partic. able to withstand high transient torque effects. Relatively constant motor torques. Used for pile drivers and other building equipment.